180.degree. Phase shifter for microwaves supplied to a load such

Details 180.degree. Phase shifter for microwaves supplied to a load such 180.degree. Phase shifter for microwaves supplied to a load such

1977-05-23

1979-03-27

Lieberman, Eli

Communications: radio wave antennas

Antennas

With coupling network or impedance in the leadin

333204, H01P 118, H01Q 326

Patent

active

041468961

ABSTRACT:
A microstrip line, formed on a dielectric substrate by a conductor strip and a ground-plane layer or a pair of flanking coplanar layers, is electrically coupled to a slot line on that substrate with the aid of supplemental conductors establishing alternate microwave transmission paths between a terminal portion of the strip and respective slot edges. The supplemental conductors include a pair of diodes which are rendered selectively conductive to unblock one or the other transmission path, thereby enabling a 180.degree. shifting of the phase of oscillations transmitted by the slot line to a load upon energization of the microstrip line by a source of microwaves. The load may be a radiating element of an electronically scanning antenna.

REFERENCES:
patent: 3678395 (1972-07-01), Hunton et al.
patent: 3715692 (1973-02-01), Reuss
patent: 4070639 (1978-01-01), Nemit

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