Patent ID: 8687529
Filing Date: 2014-04-01
Classification: H04B

Abstract:
1. A mobile wireless communication device, comprising: a first circulator coupled between a first communications arrangement and a first diplexer, the first diplexer coupled to the first communications arrangement and coupling a first antenna to the first circulator; a first tuning network coupled to a port of the first circulator; a second circulator coupled between a second communications arrangement and a second diplexer, the second diplexer coupled to the second communications arrangement and coupling a second antenna to the second circulator; a second tuning network coupled to a port of the second circulator, wherein the tuning networks are operable to tune the circulators for maximum isolation from cross coupling between power amplifiers of the respective communications arrangements within an operating frequency band of the respective communications arrangements; and an additional diplexer coupled between each circulator and its associated tuning network, wherein the additional diplexer is tuned to an in-band operational frequency and an out-of-band offending frequency.