FREQUENCY CONVERTER UNITS FOR L-BAND, S-BAND, C-BAND, AND X-BAND.
Interim development rept. no. 12, 1-30 Jun 64,
ELECTROMAGNETIC TECHNOLOGY CORP PALO ALTO CALIF
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Twenty D5253 mixer diodes were received and tests have shown that the impedances are improved, the conversion loss is good, and the high-power properties are similar to the 1N53. An L-band converter, using D5253 crystals, was fabricated and tested with an actual conversion loss of 12 db and a match that nearly meets the specification at the L-band port. Work on the doublebalanced converter hardware for the 1N53 and the adaption thereof for the D5253 was terminated with the fabrication of improved hardware specifically designed for the D5253 see, e. g., AD-432 394. Apparatus for launching the local oscillator and Ka-band signals was fabricated and tested. An improved single-crystal holder for testing the D5253 diode was fabricated, tested and is working satisfactorily. An improved high-pass filter was fabricated, tested and is being used. Some environmental and stability tests on the local oscillator were carried out. The resistive loss study was de-emphasized after the successful testing of the D5253 diode mixer hardware. Author