A novel microstrip power division duplexer

The invention discloses a novel microstrip power dividing duplexer, comprising a polygonal dielectric substrate with a metal ground plane on a lower surface, an input port feed line, a first to fourthoutput port feed lines and a first to fourth output coupling lines on an upper surface of the polygonal dielectric substrate. Between that fee line of the first output port and the feed line of the second output port and the feed line of the input port, the same first and second E-type two-mode resonators are respectively arranged, and between the feed line of the third and fourth output port andthe feed line of the input port, the same third and fourth E-type two-mode resonators are respectively arranged. The first and second E-type two-mode resonators are respectively arranged between thefeeder line of the first output port and the feeder line of the input port. A first isolation resistor is provided between the first and second E-type dual-mode resonators, and a second isolation resistor is provided between th