| Abstract: | A feed network based on substrate integrated waveguide for 38 GHz application is proposed in this article. The network consists of a 90° hybrid, a 180° hybrid, a power divider, and a switchable phase shifter. There are two input ports in the reconfigurable multibeam feed network (RMBFN) and a set of symmetrical radiation pattern will be excited by the two input ports. In addition, the other symmetrical patterns will be obtained by adjusting the different states of the switchable phase shifter. The simulated results show that the S11 and S22 are found to be better than ?13 dB over 37‐40 GHz. Meanwhile, the amplitude of the three output ports is about ?6.6 ± 1 dB, and the phase difference is ±60 ± 10° or ±120 ± 10°. When the proposed RMBFN feeds for an antenna array, four different beams with the main beam pointing to the ±22 ± 3° and ±43 ± 3° are obtained. |
