RF phase shift apparatus having an electrically coupled path separated from an electromagnetically coupled path to provide a substantially constant phase difference therebetween

摘要

Circuitry for shifting a phase of a radio frequency (RF) signal. Mutually dissimilar and electrically coupled portions of an electromagnetic transmission line pattern on one side of a substrate interact with another electromagnetic transmission line pattern on the opposing substrate side to convey a RF signal with a phase shift that is determined by the RF signal frequency and respective dimensions of the electromagnetic transmission line patterns and is substantially constant over a wide bandwidth. With multiple implementations of such opposing electromagnetic transmission line patterns having different pattern dimensions and coupled between RF signal switches, multiple phase shifts can be selectively provided.

主权项

1. An apparatus including circuitry for shifting a phase of a radio frequency (RF) signal, comprising:
a substrate formed of an electrical insulator and having mutually opposed first and second sides; first, second, third and fourth electrical signal terminals disposed on said substrate; a first electrically conductive layer disposed on said first side and including a first electromagnetic transmission line pattern with mutually dissimilar and electrically separate first and second pattern portions, wherein
said first pattern portion electrically couples said first and second electrical signal terminals, andsaid second pattern portion electromagnetically couples said third and fourth electrical signal terminals; and a second electrically conductive layer disposed on said second side and including a second electromagnetic transmission line pattern for electromagnetic communication with said second pattern portion.