| A TUNNEL-DIODE HARMONIC-MODE MIXER. |
APR 1968 |
|
| Authors:
Barbara A. Miller; STANFORD UNIV CALIF STANFORD ELECTRONICS LABS
|
 | The report describes the theoretical and experimental investigation of a tunnel-diode harmonic-mode mixer, which has an IF frequency given by the difference between the RF signal and the second harmonic of the local oscillator frequency. This harmonic mode of operation would allow use of a local oscillator at a subharmonic rather than at the fundamental frequency in conventional superheterodyne receivers. The experimental S-band mixer built employs two directional filters, which ... |
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| STUDY OF TRANSVERSE WAVE INTERACTIONS. |
APR 1968 |
|
| Authors:
K. I. Talbot; C. H. Durney; R. W. Grow; UTAH UNIV SALT LAKE CITY MICROWAVE DEVICE AND PHYSICAL ELECTRONICS LAB
|
| The purpose of this project is to evaluate analytically and experimentally the interaction of waves in a wave guide with waves on a rotating electron beam. The methods of analysis include use of a general coupled-mode theory, a ballistic computer program, and an experimental evaluation. It has been found that the previous power saturation criteria are invalid because they were based on a one- and two-dimensional model. A possible criterion ... |
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| STUDY OF EMISSION SPECTRA BY PHASE-DISCRIMINATION METHODS. |
APR 1968 |
|
| Authors:
Fred P. Dickey; William H. Rogge; Herman E. Scott; John R. Yane; John T. White; OHIO STATE UNIV RESEARCH FOUNDATION COLUMBUS
|
| A detailed report is given of the analysis of the emission spectrum of the OH radical in the regions of the fundamental and first overtone vibration-rotation bands. The observations were made with a high-resolution prism-grating vacuum spectrometer. Reports are also included on work completed on pulsed argon lasers, the emission spectrum of CN obtained by using microwave excitation, and the results of experiments carried out with a selective-frequency CO2 laser. ... |
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| CARRIER WAVES IN TWO-COMPONENT SEMICONDUCTOR PLASMAS, |
MAR 1968 |
|
| Authors:
Reidar Kuvas; NORGES TEKNISKE HOEGSKOLE TRONDHEIM DIV OF PHYSICAL ELECTRONICS
|
| The report deals with propagation of plane microwaves in an infinite semiconductor plasma having two types of carriers. The dispersion relations are established from Maxwell's equations and the continuity equations for each of the two types of carriers. The dispersion relations for carrier waves are solved in the special cases of an electron-hole plasma and a two-valley semiconductor. In the electron-hole plasma an almost unattenuated mode of propagation is found, ... |
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| POLYURETHANE COATINGS FOR RAIN EROSION PROTECTION. |
MAR 1968 |
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| Authors:
George F. Schmitt Jr; AIR FORCE MATERIALS LAB WRIGHT-PATTERSON AFB OHIO
|
| Advancements in polyurethane coatings for subsonic rain erosion protection of metallic and plastic laminate substrates are described. Polyurethane coatings have been developed which offer protection for up to two hours at 500 MPH in two inches per hour simulated rainfall on a whirling arm apparatus; by comparison the specification neoprene coating lasts five to eight minutes under the same conditions. Flight tests on an F-100 aircraft and a UH-1 helicopter ... |
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| OBSERVATION AND FORECASTING OF SOLAR PROTON EVENTS. |
MAR 1968 |
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| Authors:
John P. Castelli; AIR FORCE CAMBRIDGE RESEARCH LABS L G HANSCOM FIELD MASS
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| Solar burst characteristics in the radio microwave region are used to differentiate between large flares that might produce proton events and those that might not. Proton events produce high-level absorption, disrupt polar communications, and can be dangerous to man and equipment in space. They may precede the auroral and magnetic storms that disturb many radiowave propagation systems. The probability of a proton event can now be predicted, an AFCRL study ... |
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| TABULATIONS OF PROPAGATION DATA OVER IRREGULAR TERRAIN IN THE 230- TO 9200-MHZ FREQUENCY RANGE. PART 1: GUNBARREL HILL RECEIVER SITE |
MAR 1968 |
343 pages |
| Authors:
P. L. McQuate; J. M. Harman; A. P. Barsis; INSTITUTE FOR TELECOMMUNICATION SCIENCES BOULDER CO
|
 | This four-part report contains tabulations and graphs of transmission loss data resulting from propagation experiments in the 230- to 9200-MHz range conducted over irregular terrain in Colorado. Each part of the report deals with data obtained at a single common receiver site over a large number of propagation paths varying in length from 0.5 to 120 km. |
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| MICROWAVE SOLID-STATE DEVICE STUDIES. |
MAR 1968 |
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| Authors:
J. E. Rowe; MICHIGAN UNIV ANN ARBOR ELECTRON PHYSICS LAB
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| The objectives are to investigate theoretically and experimentally new solid state phenomena and techniques having application to microwave generation, amplification, and control. Current tasks under this program include: Microwave noise emission from InSb; Instabilities in germanium; Equivalent circuits for solid-state devices; Gun effect amplifiers; Transverse and magnetic field effects in semiconductors; Avalanche-diode devices; Structures for microwave integrated circuits; Helicon waves in semiconductors; Analysis of dispersion relations; Solid-state device construction. (Author) ... |
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| ELECTROACOUSTIC DELAY LINES FOR MICROWAVE FREQUENCIES, |
MAR 1968 |
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| Authors:
Frank Reggia; Ting H. Mak; HARRY DIAMOND LABS WASHINGTON D C
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| The paper describes techniques for the generation and propagation of elastic waves in the frequency range 1 to 3 GHz. These techniques include the design, fabrication, and evaluation of microwave acoustic delay lines consisting of highly oriented electroacoustic CdS transducers vacuum deposited on single-crystal sapphire propagating media. Typical electrical characteristics at 2 GHz of these thin-film (approximately one micron) transducers and delay media combination, in both coaxial and strip transmission ... |
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| HYDROGEN DOPING AND PARAMAGNETIC PROPERTIES OF IONIC CRYSTALS AT HIGH TEMPERATURES, |
MAR 1968 |
|
| Authors:
Raymond A. Serway; Reagen Zogby; ROME AIR DEVELOPMENT CENTER GRIFFISS AFB N Y
|
| This report describes the results of a two-phase solid state research program. The first phase was an effort to dope single crystals of the alkaline earth fluorides with hydrogen by diffusion techniques at high temperatures. The techniques used to successfully dope calcium fluoride with hydrogen and the difficulties encountered with cadmium fluoride are described. The second phase of the program was concerned with the measurement of the paramagnetic properties of ... |
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| RESEARCH INVESTIGATION OF LASER LINE PROFILES. |
28 FEB 1968 |
|
| Authors:
A. J. DeMaria; N. J. Brienza; W. H. Glenn Jr.; G. L. Lamb Jr.; M. E. Mack; UNITED AIRCRAFT CORP EAST HARTFORD CONN RESEARCH LABS
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| The report covers work performed under Contract N00014-66-C0344 for the period 1 August 1967 through 31 January 1968. Experimental results are presented on the mode-locking of an organic dye laser, the optical rectification of mode-locked laser pulses, the measurement of nanosecond fluorescent decay times, the observation of light amplification in saturable absorbers, and the generation of a 60 MHz frequency-swept, Q-switched CO2 laser pulse. An analytical solution for 2 pi ... |
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| PASSIVE MICROWAVE MEASUREMENTS OF SNOW, SOILS, AND SNOW-ICE-WATER SYSTEMS. |
15 FEB 1968 |
|
| Authors:
A. T. Edgerton; R. M. Mandl; G. A. Poe; J. E. Jenkins; F. Soltis; AEROJET-GENERAL CORP EL MONTE CALIF SPACE DIV
|
| The report summarizes field and laboratory investigations conducted to determine the microwave emission characteristics of a number of natural materials. These experiments demonstrate a useful relationship between the microwave brightness temperature and moisture content of soils and sediments. Small changes in soil moisture content can be measured by means of microwave radiometry. Other experiments have shown that multifrequency microwave measurements can provide an indication of the particle or fragment size ... |
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| CONFERENCE ON HIGH FREQUENCY GENERATION AND AMPLIFICATION, 29-31 AUGUST 1967. |
15 FEB 1968 |
|
| Authors:
Herbert J. Carlin; CORNELL UNIV ITHACA N Y SCHOOL OF ELECTRICAL ENGINEERING
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| The Conference on High Frequency Generation and Amplification is the first of a series of biennial conferences on Engineering Application of Electronic Phenomena to be offered by the School of Electrical Engineering, Cornell University. Nearly four hundred participants attended the sessions. Thirty nine scientific papers were presented. These papers encompassed fundamental physics of the Gunn effect, LSA mode, avalanche phenomena, surface recombination effects, acoustoelectric interactions in semi-conductors, and quantum electronics, ... |
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| INTEGRATED SOLID STATE TIME DELAY AMPLIFIER. |
FEB 1968 |
|
| Authors:
Herman VAN DE Vaart; SPERRY RAND RESEARCH CENTER SUDBURY MA
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| This report describes the results achieved as part of a research and development program that will lead to devices that provide a dispersionless, lossless, electronically controllable real time delay of microwave signals. The delay mechanism involves the conversion of the electromagnetic energy to be delayed into magnetoelastic energy, since this is the only method known to date which can provide dispersionless variable delay in a relatively small package. The shape ... |
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| LOW MAGNETIC SATURATION GARNETS. |
FEB 1968 |
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| Authors:
L. R. Hodges Jr.; G. P. Rodrigue; G. R. Harrison; SPERRY RAND CORP CLEARWATER FLA SPERRY MICROWAVE ELECTRONICS DIV
|
| The substitution of gallium from 0 to 6 percent for iron in single crystal BiCaVIG was completed. The magnetization was observed to increase with initial gallium substitution then drop rapidly for gallium substitution greater than approximately 4 percent. The anisotropy field (2 K sub 1/M sub s) versus temperature is reported for an aluminum and a gallium substituted BiCaVIG. The room temperature anisotropy fields for these two materials are -35 ... |
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| DEVELOPMENT OF A 1-WATT, 2 GHZ SILICON UHF POWER TRANSISTOR. |
FEB 1968 |
|
| Authors:
P. L. McGeough; H. C. Lee; RADIO CORP OF AMERICA SOMERVILLE NJ ELECTRONIC COMPONENTS AND DEVICES
|
| A 1-watt, 2-gigahertz device, coaxial transistor, having 6- to 7-dB power gain and 30- to 40-percent collector efficiency was developed in this program. This significant increase in UHF device performance is the result of technology developed during shallow diffusion and epitaxial material studies. The transistor is enclosed in a hermetic coaxial package, developed during the package study phase of this program. (Author) |
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| ATTACHMENT AND RECOMBINATION PROCESSES IN ATMOSPHERIC GASES. |
FEB 1968 |
|
| Authors:
M. E. Wyatt; R. Denson; GENERAL DYNAMICS SAN DIEGO CA GENERAL ATOMIC DIV
|
| Experiments were performed to measure the coefficients for electron attachment and electron-ion recombination in important atmospheric gases and atmospheric impurities in the temperature range of 180 to 700K. These experiments were performed using microwave transmission techniques on an afterglow produced by relativistic electrons traversing the gas sample. A mass spectrometer was used to identify the ions present in the afterglow. Electron thermalization and collision frequency for momentum transfer were also ... |
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| VOLUNERABILITY EFFECTS IN BULK-SOLIDS. VOLUME II. OPERATION OF GUNN DEVICES IN A SERIES D-C BIAS CONFIGURATION. |
JAN 1968 |
|
| Authors:
John William Monroe; CORNELL UNIV ITHACA N Y SCHOOL OF ELECTRICAL ENGINEERING
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| Operation of Gunn devices in a series d-c arrangement is discussed. Theoretical arguments show that series operation, if attainable, can result in higher-quality microwave output signals and greater efficiency of operation resulting from an increase in r-f output power available from the series device. Three different experimental circuits were employed in the effort to obtain series device operation. The most successful circuit turned out to be a strip-line resonator with ... |
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| VULNERABILITY EFFECTS IN BULK-SOLIDS. VOLUME III. AN AVALANCHE DIODE ACTIVE MICROWAVE MIXER. |
JAN 1968 |
|
| Authors:
A. Sweet; CORNELL UNIV ITHACA N Y SCHOOL OF ELECTRICAL ENGINEERING
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| An avalanche diode is proposed as a microwave mixer. In addition to providing its own local oscillator, the diode may amplify the input signal, and the I.F. output. These amplifications could result in conversion gain. Best experimental result was 4 db conversion loss and a noise figure of 65 db at I.F. = 40 MHz. The diode was operated in a standard medium Q microwave circuit. A special high Q ... |
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| SATELLITES AND TECHNOLOGY FOR COMMUNICATIONS: SHAPING THE FUTURE, |
JAN 1968 |
|
| Authors:
J. L. Hult; RAND CORP SANTA MONICA CALIF
|
| An outline of some technological possibilities and alternatives for communications, emphasizing the use of satellites. This involves estimating capabilities that are technologically feasible together with the comparative costs for acquiring them. The objective is to expose interesting possibilities in the field of communications and to stimulate consideration of the social changes that may accompany the acceptance of various alternatives. (Author) |
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| VULNERABILITY EFFECTS IN BULK-SOLIDS. VOLUME I. |
JAN 1968 |
|
| Authors:
L. F. Eastman; L. A. MacKenzie; J. BAUKUS; J. Ballantyne; R. E. Hayes; CORNELL UNIV ITHACA N Y SCHOOL OF ELECTRICAL ENGINEERING
|
| Intrinsic characteristics of Gunn diodes, avalanche diodes, and bulk effects in magnetized InSb were studied for methods and techniques of enhancing electromagnetic compatibility in applications of these devices. Gunn domain mode oscillators were studied for their harmonic outputs and spectral content. 15 GHz oscillators were found to have high harmonic content even to the tenth harmonic, and heat sinking of the diodes was undertaken to allow measurements over a range ... |
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| MICROWAVE OSCILLATIONS IN BULK SEMICONDUCTORS. |
JAN 1968 |
|
| Authors:
N. Braslau; H. M. Woodall; C. Lanza; A. E. Blakeslee; IBM THOMAS J WATSON RESEARCH CENTER YORKTOWN HEIGHTS NY
|
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| LOW TEMPERATURE SYNTHESIS OF FLUORINE-CONTAINING SPECIES. |
JAN 1968 |
|
| Authors:
Gleb Mamantov; TENNESSEE UNIV KNOXVILLE DEPT OF CHEMISTRY
|
| A modified rotating cryostat and its use for in situ infrared studies are described. This device has been used to study reactions involving nitrogen oxides, tetrafluorohydrazine, oxygen difluoride, chlorine fluorides and elemental fluorine at 77K. (Author) |
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| MICROWAVE PROPERTIES OF PARTIALLY MAGNETIZED FERRITES. |
JAN 1968 |
|
| Authors:
Jerome J. Green; Carl A. Patton; Frank Sandy; RAYTHEON CO WALTHAM MA RESEARCH DIV
|
| Measurements of mu' and kappa' as a function of gamma 4 pi M sub s/omega and gamma 4 pi M/omega have been made on two common, commercially available, polycrystalline ferrites, G-113, a yttrium iron garnet, and TT1-390, a magnesium manganese spinel. The corresponding absorption components of the tensor permeability have also been measured on G-113 at room temperature. mu double prime-kappa double prime shows a peak at negative fields. A ... |
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| A STUDY OF SOLAR RADIO BURSTS IN THE 3.4 TO 50 CM RANGE AND THEIR CORRELATION TO SCNA EVENTS. |
JAN 1968 |
|
| Authors:
Federico M. Strauss; Michael D. Papagiannis; BOSTON UNIV MASS
|
| We have conducted a statistical study of the correlation between solar radio bursts and sudden cosmic noise absorption events. Our main purpose was to study the relative effectiveness of the different microwave frequencies in detecting the radio bursts that are associated with X-ray emission from the Sun. In the frequency range covered (606 to 8800 MHz), it was found that the higher the monitoring frequency, the better the correlation with ... |
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| Ocular Effects of Microwave Radiation. |
1968 |
|
| Authors:
Milton M. Zaret; ZARET FOUNDATION INC SCARSDALE N Y
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| ADVANCED TECHNIQUES FOR AEROSPACE SURVEILLANCE. |
1968 |
|
| Authors:
W. T. Blackband; ADVISORY GROUP FOR AEROSPACE RESEARCH AND DEVELOPMENT PARIS (FRANCE)
|
| Contents include: Effects of atmospheric turbulence on the polarisation of a laser beam at 6328A; Passive microwave sensing of the atmosphere and earth surface environments; Spectral characteristics of ground objects and backgrounds with reference to ground surveillance; Some results of passive microwave groundmapping; Next generation digitally controlled microwave surveillance receiver systems; A continuously calibrated microwave radiometer; Receiving and recording the wide dynamic range of signals of a side-looking radar system; ... |
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| MAGNETIC Q-FACTORS OF PARAMAGNETIC MASER CRYSTALS (DOBROC MAGNETYCZNA MASEROWYCH KRYSTALOW PARAMAGNETYCZNYCH), |
01 DEC 1967 |
|
| Authors:
M. Herman; FOREIGN TECHNOLOGY DIV WRIGHT-PATTERSON AFB OH
|
| Calculations of the magnetic quality factor of paramagnetic maser crystals were carried out. The results show that the magnitude of this factor depends on many other factors and, consequently, is affected in various ways. Maser crystals with the least possible quality factor value can be obtained by increasing the capacity duty factor, by increasing the pumping frequency, or by increasing the spin-spin relaxation time. The quality factor values obtained in ... |
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| HIGH-FREQUENCY BREAKDOWN OF NONUNIFORM GASES IN SPATIALLY VARYING FIELDS, |
NOV 1967 |
|
| Authors:
Melvin Epstein; AEROSPACE CORP EL SEGUNDO CALIF LAB OPERATIONS
|
| A method is described for predicting the field strength required to produce cw breakdown of gases with spatially varying properties subjected to electric fields of nonuniform intensity. The proposed method is based on a variational principle derived from the electron continuity equation. A Ritz method is used to generate solutions of the variational problem. The approximate solutions are evaluated by comparing them with several exact solutions which are also developed ... |
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| MICROWAVE DEVICE TECHNIQUES FOR AEROSPACE SURVEILLANCE. |
NOV 1967 |
|
| Authors:
STANFORD UNIV CALIF MICROWAVE LAB
|
| The objectives of the contract are: to conduct a theoretical and experimental investigation of microwave techniques with a view toward development of devices applicable to surveillance systems. The emphasis shall be primarily directed toward requirements of phased array radar systems. The investigation presently includes the following projects: Thin film transducers; Acoustic parametric amplification; Domain fields in gunn oscillators; Periodic ferrite devices; Adiabatic magnetoelastic conversion in the time domain; Gunn effect ... |
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| MICROWAVE NETWORKS WITH CONSTANT DELAY. |
OCT 1967 |
|
| Authors:
J. O. Scanlan; J. D. Rhodes; LEEDS UNIV (ENGLAND)
|
| A general class of transfer functions whose delay is constant at all frequencies, and capable of realization by commensurate TEM microwave networks is presented. Examples of this class where the transducer power gain has equiripple behaviour in the passband, the stopband or both are given, and forms suitable for lowpass or bandpass filters, or broadband matching transformers are derived. The synthesis of networks to realize all of these functions is ... |
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| MICROWAVE DIODE RESEARCH. |
OCT 1967 |
|
| Authors:
D. F. Ciccolella; B. C. De Loach Jr.; L. P. Marinaccio; T. Misawa; K. D. Smith; WESTERN ELECTRIC CO INC NEW YORK
|
| The work described in this report is part of a broad program of continuing theoretical and experimental studies to achieve improved microwave semiconductor diodes and combination microwave devices. Of immediate particular interest is the research and development effort directed toward clarifying the relationship between structure and behavior of avalanche transit-time diode oscillators and improving their microwave performance. Chapter 1 describes experimental work performed in an effort to obtain maximum microwave ... |
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| EXPERIMENTAL STUDY OF VOLTAGE BREAKDOWN CHARACTERISTICS OF TRANSMITTING ANTENNAS. |
SEP 1967 |
|
| Authors:
Richard C. Warder Jr.; Richard M. Rosen; Alan S. Penfold; Gerald R. Seemann; LITTON SYSTEMS INC BEVERLY HILLS CA SPACE SCIENCES LABS
|
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| MICROWAVE NANOSECOND PULSE-GENERATOR STUDY. |
SEP 1967 |
|
| Authors:
Marshall C. Pease; Arthur Karp; STANFORD RESEARCH INST MENLO PARK CA
|
| The possibility of generating very short pulses of microwave energy at very high power levels by the use of a spark gap was studied. In Task I of the program the use of solid dielectric, in the form of a disposable tape, was studied as a means of increasing the voltage hold-off of a given gap and so increasing the output power. It was shown that this is indeed an ... |
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| MICROWAVE PROPERTIES OF SINGLE-CRYSTAL NICKEL-ZINC FERRITES. |
SEP 1967 |
|
| Authors:
Samuel Dixon Jr.; Joseph W. McGowan; ARMY ELECTRONICS COMMAND FORT MONMOUTH N J
|
| Data are given on ferrimagnetic resonance properties in annealed (1000C) single-crystal, nickel-zinc ferrite spheres taken at 9.3 GHz and between 4.2K and room temperature. Because of the high saturation magnetization, 4 pi M sub s = 5000 plus or minus 100 gauss, the dc magnetic field for subsidiary ferrimagnetic resonance is coincident with the field for uniform precessional resonance for f < or = 9.5 GHz. At 4.2K, Delta H(111) ... |
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| A SIMPLIFIED METHOD OF DESIGN FOR A CLASS OF HIGH-POWER MICROWAVE FILTERS, |
31 AUG 1967 |
|
| Authors:
Lin Kang; FOREIGN TECHNOLOGY DIV WRIGHT-PATTERSON AFB OHIO
|
| A simple equivalent circuit is established for the taper section of a class of a high-power microwave filter consisting of taper sections of radial lines and sections of uniform line. A simplified design of this class of filter was developed by making use of the equivalent circuit. |
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| NEGATIVE CYCLOTRON RESONANCE ABSORPTION. |
25 AUG 1967 |
|
| Authors:
Jonathan M. Wachtel; YALE UNIV NEW HAVEN CONN DEPT OF ENGINEERING AND APPLIED SCIENCE
|
| The kinetic theory of waves in an infinite plasma in a uniform, constant magnetic field predicts that radiation near the cyclotron frequency in a sufficiently non-thermal plasma may grow in time. One effect which can cause such growth or negative cyclotron resonance absorption of radiation which propagates perpendicular to the magnetic field direction is the relativistic energy dependence of the electron's mass. Another is the energy dependence of the electron-atom ... |
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| MICROWAVE ASSEMBLY FOR THE HELCAR III RADAR SET. |
07 AUG 1967 |
|
| Authors:
Frank E. Hasseld Jr; NAVAL AVIONICS FACILITY INDIANAPOLIS IND
|
| The microwave assembly was designed and developed for the HELCAR III Radar, which is a pulsed system operating between the frequencies of 9.6 and 10.0 GHz. This system was designed for use in helicopters to aid in collision avoidance, station keeping, navigation, and ASW tactical operations. (Author) |
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| ELECTROMAGNETIC INTERFERENCE MEASUREMENT METHODS-SHIELDED ENCLOSURE. |
AUG 1967 |
|
| Authors:
W. R. Free; C. H. Bonham; R. E. Gibson; B. M. Jenkins; GEORGIA INST OF TECH ATLANTA ENGINEERING EXPERIMENT STATION
|
| Investigation of techniques and procedures for making radiated measurements in shielded enclosures, which can be correlated with measurements made in the open-field, have continued. A microwave hooded antenna for use over the 1 to 12 GHz frequency range was evaluated after a modification to integrate a series injection calibration network into the antenna structure. The results of this evaluation indicate that the characteristics of the probe antenna are acceptable. An ... |
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| MICROWAVE TRANSISTOR INTERMEDIATE-FREQUENCY AMPLIFIER (2 GHZ). |
JUL 1967 |
|
| Authors:
Vladimir Gelnovatch; Ivan L. Chase; Thomas F. Burke; ARMY ELECTRONICS COMMAND FORT MONMOUTH N J
|
| A method of designing microstrip amplifiers is presented. Transmission line measurements for the transistors are converted to obtain the Z, Y, h, etc., parameters, and maximum available gain at the frequency of interest is then determined. Coupling networks are computed in the form of simple series L- and C-type structures, and width over height (W/h) as a function of frequency is determined. Using these techniques, the fabrication of two amplifiers ... |
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| MICROWAVE SOLID-STATE DEVICES AND CIRCUITS. |
JUL 1967 |
|
| Authors:
Frank A. Brand; Vladimir Gelnovatch; ARMY ELECTRONICS COMMAND FORT MONMOUTH N J
|
| The progress and state-of-the-art in the areas of microwave solid-state devices and circuits are presented. Treated specifically is the performance of most solid-state devices, both available and predicted. The microwave aspects of integrated circuits are examined tutorially and a number of examples presented. (Author) |
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| BROADBAND LATCHING SWITCHES AND CIRCULATORS. |
JUL 1967 |
|
| Authors:
J. W. Simon; W. K. Alverson; J. E. Pippin; SCIENTIFIC-ATLANTA INC GA
|
| This report describes the development of TEM junction circulators having very thin center conductors and ground planes for the frequency bands 1 to 2 GHz and 2 to 4 GHz. It is pointed out that the achievement of such designs (for very thin center conductors and ground planes) is a necessary prelude to constructing external return path latching circulators, since very thin conductors are necessary to minimize eddy current losses ... |
|
| MICROWAVE MONITORING OF SEA WATER CONTAMINATION OF NAVY FUEL OILS, |
21 JUN 1967 |
|
| Authors:
Dean D. Howard; Nathaniel A. Thomas; Michael C. Licitra; Robert M. Roe; NAVAL RESEARCH LAB WASHINGTON D C
|
| Studies of microwave monitoring techniques have resulted in a potential method of monitoring of the percentage of sea water contamination to an accuracy of 0.25%. Investigation was made of both the dielectric constant and the dissipation (microwave energy loss) characteristics of contaminated fuel. The dissipation measurement gave the greater accuracy which improved with increasing microwave frequency. The dissipation measured for all samples of uncontaminated fuels was very small compared to ... |
|
| FOUNDATIONAL RESEARCH PROJECTS, JANUARY-MARCH 1967. |
15 JUN 1967 |
|
| Authors:
H. H. Caspers; C. F. Cook; G. E. Everett; T. Hadeishi; S. A. Miller; NAVAL ORDNANCE LAB CORONA CALIF
|
| Contents: Microwave photon interaction with superconducting tunneling currents; Phenomenon of spin exchange collisions between ions and neutral atoms in a plasma; Two-phonon matrix elements and absorption for crystal models with zinc blende structure, part III; Energy transfer between Nd(3+) and Yb(3+) in LaF3. |
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| THE MICROWAVE SURFACE RESISTANCE OF SUPERCONDUCTING LEAD, TRAPPED MAGNETIC FLUX, AND A NEW MAGNETOMETER USING SUPERCONDUCTIVITY. |
JUN 1967 |
|
| Authors:
John Morley Pierce; STANFORD UNIV CALIF HIGH ENERGY PHYSICS LAB
|
| An investigation has been made into the causes of the residual surface resistance which is always observed in superconductors at microwave frequencies. A new and extremely sensitive magnetometer has been developed which uses unique properties of superconductivity. Calculations and measurements indicate that this magnetometer can detect a field change of 3 x 10 to the minus 10th power gauss in a loop with 1 cm radius. The magnetometer uses a ... |
|
| RESEARCH ON RELAXATION PROCESSES IN MAGNETIC MATERIALS. |
JUN 1967 |
|
| Authors:
E. Schloemann; T. Kohane; J. J. Green; RAYTHEON CO WALTHAM MA RESEARCH DIV
|
| The influence of magnetic inhomogeneity (spatial variation of the local saturation magnetization) upon the properties of magnetic materials has been investigated. Measurements were carried out on polycrystalline yttrium iron garnets of varying, and generally fairly large, porosity. Data are presented concerning the static magnetization as a function of dc field-strength, the differential susceptibilities at microwave frequencies with rf field applied either parallel or perpendicular to the dc field ('longitudinal' and ... |
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| MICROWAVE RADIOMETER FOR MISSILE GUIDANCE. |
JUN 1967 |
|
| Authors:
SPACE-GENERAL EL MONTE CA
|
| The report examines a passive microwave tracking radiometer system which can be applied to surface-to-air and air-to-air terminal guidance technology. |
|
| PROPOSED BARIUM OXIDE MOLECULAR BEAM FREQUENCY STANDARD. |
JUN 1967 |
|
| Authors:
Helmut Hellwig; ARMY ELECTRONICS COMMAND FORT MONMOUTH NJ
|
| A proposed molecular beam tube is described, utilizing the lowest rotational transition in barium oxide (Ba(138)O(16)) at 18.7 GHz. The choice of this special molecule is discussed. Special features of this new molecular beam tube will be the absence of sensitivity to external magnetic fields, very low microwave driving power, and small size and light weight. The frequency of the proposed beam tube is expected to be subject to only ... |
|
| STUDY OF NOISE IN SEMICONDUCTOR DEVICES. |
JUN 1967 |
|
| Authors:
A. VAN DER Ziel; MINNESOTA UNIV MINNEAPOLIS DEPT OF ELECTRICAL ENGINEERING
|
| The existing transistor noise theory was further tested. It is shown that the theory is adequate, even at high injection levels, except for the fact that it cannot explain the correlation between the emitter noise emf e and the collector noise current generator i. The experiments clearly indicate that this is a high level injection effect and give the most prominent features of this correlation effect. Noise measurements are reported ... |
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| ELECTRONICALLY TUNABLE ZNY FILTERS. |
JUN 1967 |
|
| Authors:
R. Grossbach; LORAL ELECTRONIC SYSTEMS BRONX NY
|
| The report details the work done to date on ZnY filters in the 26-40 GHz band. An equivalent circuit for planar ferrite resonators was derived, materials were fabricated and tested, and coupling geometries were considered. A particular geometry, using a magic T, was found to offer several advantages over the standard orthogonal configurations. A theoretical study of the use of dielectrics to increase coupling revealed a fundamental limitation of this ... |
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Reports by Keyword(s)
MICROWAVE FREQUENCY
