Patent ID: 7538634
Filing Date: 2009-05-26
Classification: H01P

Abstract:
1. A frequency diplexer with an input port and a first and a second output ports, said frequency diplexer entailing on the first output port a first frequency response over a first frequency range and on the second output port another frequency response over a second frequency range complementary of the first frequency range, said frequency diplexer comprising: two directional couplers, one being upstream, the other being downstream, each of which has one input port, a coupled output port, an isolated output port and a through output port, the input port of the upstream directional coupler acting as the input port of the diplexer, the isolated output port of the upstream directional coupler acting as the second output port of the diplexer, the through output port of the downstream directional coupler being supplied by a short-circuited adapting impedance and the coupled output port acting as the first output port of the diplexer, characterized in that it further comprises: an unique filter that entails either the first or the second frequency response, and a first and a second T splitters each having an input port, an output port and a third port, the through output port and the coupled output port of the upstream directional coupler being respectively connected to the two ports of the first T splitter the third port of which is connected to the output port of the filter the input port of which is connected to a first port of the second T splitter, the two ports of the second T splitter being respectively connected to the input port and to the isolated output port of the downstream coupler.