Microstrip to waveguide transition

Details Microstrip to waveguide transition Microstrip to waveguide transition

1981-11-02

1984-06-05

Gensler, Paul L.

Wave transmission lines and networks

Coupling networks

Balanced to unbalanced circuits

333 33, H01P 5107

Patent

active

044531427

ABSTRACT:
A microstrip to waveguide transition is achieved by passing a portion of a microstrip circuit through an aperture in a transverse wall of a waveguide. The aperture is dimensioned and positioned so as not to significantly disturb propagation in the waveguide. A tab of the microstrip substrate extends through the aperture and into the waveguide, where a probe disposed on the tab couples to energy in the waveguide. The probe is connected to the microstrip circuit by means of a transition section on the tab within the aperture. The transition section is as narrow as possible to minimize capacitive coupling to the waveguide wall and is an integral multiple of one-half wavelength for a smooth impedance match from the probe to the microstrip.

REFERENCES:
patent: 2825876 (1958-03-01), Le Vine et al.
patent: 2829348 (1958-04-01), Kostriza et al.
patent: 3579149 (1971-05-01), Ramsey
patent: 3715635 (1973-02-01), Michel et al.
patent: 4006425 (1977-02-01), Chang et al.
Karapetyan et al., Waveguide-Microstrip Transition with Low Losses for the 3 Cm Range, Instr. & Exper. Tech., vol. 19, No. 3, Pt. 2, May-Jun. '76, (USSR), 333-26.

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