Final rept. 13 Jun 1977-13 Sep 1978
NORTHROP RESEARCH AND TECHNOLOGY CENTER PALOS VERDES PENINSULA CA
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An experimental phase-locked phase shifter was designed and tested. This phase shifter is intended for use as the local oscillator for a mixer, shifting the phase of a signal as it passes through. The output frequency was 915 MHz, though results are independent of frequency down to 12.8 MHz and up to at least 2 GHz. This makes phase shifter performance independent of signal bandwidth. This phase shifter is linear and stable over a or - 600 degree range. Maximum error from best straight line was 2.3 and - 9.4 degrees, limited phase detector linearity. Settling time to within 10 was 1.6 microseconds. Circuit description, schematic and performance curves are contained in the report. A dual element conical monopole antenna was interfaced with the phase shifter and a phase reference oscillator. Antenna patterns for this combination were recorded for frequencies from 7 to 15 GHz. These patterns are contained in Appendixes A through H. Omnidirectional beam steering was demonstrated and octave bandwidth was easily obtained.
- Electrical and Electronic Equipment