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Abstract:
Requirements exist for high power, low noise Ka band active interceptor seeker transmitters. This technology demonstration program has the goal of demonstrating a Ka band solid state transmitter with 1000 watts peak output power, 10 to 30% duty cycle, 0.05 to 50 microseconds pulse width, 250 cu. in. of volume, and 12.5 lb in weight. These goals represent a factor of four improvement in the power density (W/cm2) compared to the current state of the art long pulse solid state transmitter design. To achieve these program goals, several approaches are being explored to double individual device performance and double the power combining density of the circuits. The more successful approaches will be selected for incorporation into the final transmitter design. In the active solid state device area, two approaches under investigation are (1) development of Indium Phosphide (InP) based IMPATT diodes and (2) reduction of the junction to heat sink thermal resistance by using p-side carbon doping of GaAs devices. In the power combining area, three approaches under investigation are (1) double the power density of the standard resonant module from four to eight devices by incorporating a push pull biasing architecture or a TE10+ mode resonant cavity, (2) power combining two chips per diode package, (3) power combining several chips on waveguide coupled planar microwave substrates.
| Limitations: |
 APPROVED FOR PUBLIC RELEASE |
| Pages: |
16 |
| Report Date: |
1981 |
| Report Number: |
A605653 |
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