Microwave landing system

Details Microwave landing system Microwave landing system

1988-12-30

1989-12-26

Blum, Theodore M.

Communications: directive radio wave systems and devices (e.g.,

Aircraft landing system

Microwave landing system

342408, 342374, G01S 1300

Patent

active

048901105

ABSTRACT:
A microwave landing system in which a beam scanning antenna is provided with an amplifying function to constitute an active array, a traditional power amplifier and the like are omitted to enhance the reliability of operation. The outputs of phase shifters each being associated with a respective one of radiating elements are connected to 1/2 dividers each having p-i-n diodes at opposite output terminals thereof, and the p-i-n diodes of each 1/2 divider are turned on and off alternately. Output signals are fed to radiating elements and a multiplexer with a minimum of loss.

REFERENCES:
patent: 4837580 (1989-06-01), Frazita

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