A novel single-layer wideband filter-integrated feeding network with quadruple outputs

A wideband filter-integrated feeding network is proposed in this paper. It consists of a single-layer wideband balun over 1–8 GHz and two compact wideband filter-integrated coupled-line couplers. Two feeding networks operating at 1.7–2.7 GHz and 2.9–4.2 GHz are simulated. Both the simulated results show that the feeding network has high frequency selectivity, wideband characteristic, and equal power division with flat 90-degree phase difference between four outputs.