Compact microstrip diplexer design using new octagonal resonators for 5G and Wi-Fi applications

Abstract

The present paper sheds light on designing a new and high performance microstrip diplexer. The latter is based on new octagonal meandrous resonators combined with the connected common port, without adding any transmission line junction, in order to get a miniaturized structure. The suggested compact resonator is formed through combining the octagonal meandrous lines and coupled lines, which create a bandpass filter. These filters operate at 3.5 GHz and 5 GHz which make them suitable for 5G and Wi-Fi applications. Accordingly, an approximated equivalent LC model of the presented octagonal meandrous resonator is suggested and analyzed so as to validate the simulation results. On top of that, the suggested diplexer is compact, as it occupies only 0.0768 λ g × 0.024 λ g. Thus, it attained excellent performance in terms of S-Parameters as the transmission coefficients are about -1 dB and the reflection coefficient is about -20 dB at both channels, whereas the isolation is about -25 dB. Hence, the validation of theoretical and simulated results is carried out through measurements of the manufactured prototype.

Design of a Miniaturized Microstrip Diplexer Based on Hairpin and Short Stub for 5G and Wi-Fi Communications

“…2 compares our designed diplexer to other diplexers mentioned in the literature. As seen, the presented diplexer has low insertion losses in both channels compared to [5,10,13,20,21,24] and high isolation compared to [6,10,13,22,23]. Furthermore, compared to [5] and [20], the proposed diplexer has a smaller size of 30 × 25 mm 2 .…”

“…Mobile communication is advancing at a rapid speed due to the increased demand for cell phones. Indeed, several high-performance passive microwave components such as antennas, filters, and diplexers are required to fulfill this demand [1][2][3][4][5][6]. Diplexer is a three-port component that combines or separates multiple signals at different frequency bands, allowing them to share the same transmission path.…”