Compact Six-Port Network Using Lange Coupler For Sub-6 GHz Fifth Generation Communication

Abstract

This paper presents a wide band six port network (SPN) with two input ports and four out ports. The designed network consists of conventional wideband Lange couplers and a Wilkinson power divider having features of out of band harmonic suppression over a wide frequency. Operation band of the SPN extends from 2.3 - 4.0 GHz covering IEEE 802.11 WLAN band at 2.4 GHz and sub-6 GHz band from 3.3 - 3.8 GHz for 5G application. A good matching at the input ports are achieved with return loss of better than 20 dB for the entire frequency range with minimum isolation between the ports is 12 dB. At frequency 3.5 GHz the output powers at the four ports are -5.56 dB, -5.47 dB, -7.07 dB, -7.16 dB with input at port-1 and the powers are -6.05 dB, -7.8 dB, -5.02 dB, -6.56 dB with input at port-2. Differential phase between two adjacent output ports are ± 90 degree.