Importance

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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.

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First Claim