Tunable microstrip and T-junction

摘要

A tunable microstrip having removable contactless tuning stubs is used in the fabrication of a tunable T-junction circuit. Arrays of tuning stubs are formed in proximity to both sides of a microstrip signal trace. Each array of tuning stubs has a shared grounding bus connected by multiple vias to the ground plane. The sinusoidally patterned shape of the tuning stubs and their proximity to the signal trace provides a minimum breakdown voltage of 1.3 kV and a tuning sensitivity of approximately 0.01 dB to 0.02 dB.

主权项

1. A tunable microstrip comprising:
a microstrip having a signal trace, a ground plane and a dielectric layer intermediate said signal trace and said ground plane; a plurality of grounded tuning stubs in proximity to at least one side of said signal trace; said plurality of tuning stubs being electrically connected to at least one grounding bus; and said grounding bus being electrically connected to said ground plane through said dielectric layer by a plurality of vias.