A High-Performance Microstrip Triplexer With Compact Size, Flat Channels and Low Losses for 5G Applications

A new microstrip triplexer with a compact size of 0.007 A,g2 is proposed in this work, where designing a microstrip triplexer with a size less than 0.01 A,(2)(g) is a big challenge. In addition to the compact size, it shows a high performance i.e. its channels are wide with low insertion losses. Moreover, the channels are flat with three low group delays (GDs) of 0.65, 0.95 and 1.17 ns, while most of the previously reported triplexers have not considered this important parameter. The proposed resonator is mathematically analyzed to find a method to get rid of harmonics and tune the resonance frequency. Meanwhile, the 1(st), 2(nd), 3(rd) and 4th harmonics are suppressed above the first channel. The designed triplexer is suitable for 5G mid-band applications. The proposed triplexer is exactly fabricated and then measured to confirm the designing method and simulation results. The obtained results show that all the simulation, mathematical analysis and experimental results are in good agreement. Therefore, the proposed triplexer can be easily used in designing high-performance RF communication systems.

Automated summary

A new microstrip triplexer with a compact size of 0.007 A,g2 is proposed in this work, offering high performance in terms of wide channels, low insertion losses, and flat channels with low group delays. Mathematical analysis is carried out to eliminate harmonics and tune the resonance frequency, resulting in the suppression of harmonics above the first channel. The fabricated triplexer is suitable for 5G mid-band applications and can be used in designing high-performance RF communication systems.