RF diversity antenna coupling structure

Details RF diversity antenna coupling structure RF diversity antenna coupling structure

2007-01-30

2007-01-30

Phan, Tho (Department: 2821)

Communications: radio wave antennas

Antennas

With coupling network or impedance in the leadin

C343S7000MS, C343S749000, C455S078000, C455S101000

Reexamination Certificate

active

11120859

ABSTRACT:
AN RF diversity antenna coupling structure includes a differential low noise amplifier, a differential power amplifier, a first switch coupled to a first antenna, a second switch coupled to a second antenna, a first transformer, a second transformer, a transformer balun. The first transformer includes a primary winding and a secondary winding, wherein the primary winding of the first transformer is operably coupled to a differential output of the power amplifier, and wherein the secondary winding of the first transformer has a desired output impedance. The second transformer includes a primary winding and a secondary winding, wherein the primary winding of the second transformer is operably coupled to a differential input of the low noise amplifier, and wherein the secondary winding of the second transformer has a desired output impedance. The transformer balun includes a first winding and a second winding, wherein the first winding is operably coupled to the secondary windings of the first and second transformers, one node of the second winding is operably coupled to the first antenna and a second node of the second winding is operably coupled to the second antenna.

REFERENCES:
patent: 2003/0107441 (2003-06-01), Grasset et al.

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