End launched microstrip or stripline to waveguide transition wit

Details End launched microstrip or stripline to waveguide transition wit End launched microstrip or stripline to waveguide transition wit

1994-05-23

1998-03-03

Lee, Benny T.

Communications: radio wave antennas

Antennas

With aircraft

343767, 343772, 343789, 333 26, 333 33, H01Q 128, H01P 5107

Patent

active

057240493

ABSTRACT:
A low profile, compact microstrip-to-waveguide transition which utilizes electromagnetic coupling instead of direct coupling. The end of the waveguide is terminated in a cavity backed slot defined in a groundplane formed on a dielectric substrate. The slot is excited by a microstrip line defined on the opposite side of the substrate, offset from the slot centerline. A cavity covers the substrate on the microstrip side, and is sized so that no cavity modes resonate in the frequency band of operation. The transition is matched by appropriate selection of the length of the slot and the length and position of the microstrip.

REFERENCES:
patent: 2877429 (1959-03-01), Sommers et al.
patent: 2885676 (1959-05-01), Baldwin
patent: 3710338 (1973-01-01), Munson
patent: 5337065 (1994-08-01), Bonnet et al.
patent: 5414394 (1995-05-01), Gamand et al.
Breithaupt, Robert W., "Conductance Data for Offset Series Slots in Stripline"; IEEE Transaction on Microwave Theory & Techniques; vol. MTT-16, No. 11; Nov. 1968; pp. 969, 970.

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