US 2019/0199348 A1 · High Throw-Count RF Switch

Abstract

A high throw-count multiple-pole FET-based RF switch architecture that provides good RF performance in terms of insertion loss, return loss, isolation, linearity, and power handling. A common port RFC is coupled along a common path to multiple ports RFn. Embodiments introduce additional common RF path branch isolation switches which are controlled by state dependent logic. The branch isolation switches help to isolate the unused branch ports RFn and the unused portion of the common path from the active portion of the common path, and thereby reduce the reactive load attributable to such branches that degrades RF performance of the ports RFn “closer” to the common port RFC. The branch isolation switches can also be used to reconfigure the switch architecture for a multiplex function as well as separate switch path banks for re-configurability of purpose, tuning, or varying switch throw counts and packaging options.

Claims20

Dependent claims

An RF switch including:

(a) at least one common path;
(b) at least one common port coupled to the at least one common path;
(c) a plurality of sections each containing at least one signal port coupled to at least one common path through a series-shunt switching element;
and
(d) at least one isolation switch connected to at least one common path between two adjacent sections, each isolation switch including at least one series switch configured to isolate connected adjacent sections;
wherein when a selected signal port is coupled to at least one common port through at least one common path, any isolation switches between the selected signal port and the at least one common port are configured in a conducting state.

3 more elements

Dependencies are inferred from the claim text.

High Throw-Count RF Switch

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High Throw-Count RF Switch

Life of this patent

Abstract

Claims20