June 22, 2024
Abbas Rezaei

Abbas Rezaei

Academic rank: Assistant professor
Education: Ph.D in Electrical engineering
Phone: 083-38305001
Faculty: Faculty ofٍٍ Electrical Engineering


Microstrip lowpass-bandpass triplexer with flat channels and low insertion losses: Design and fabrication for multi-service wireless communication systems
Type Article
Triplexer; Microstrip; Lowpass-bandpass; Group delay; Insertion loss
Researchers Leila Nouri، Salah I. Yahya، Abbas Rezaei، Fawwaz Hazzazi، Muhammad Akmal Chaudhary، Maher Assaad، B.N. Nhu


In this work, a new basic microstrip structure is proposed and analyzed to obtain a lowpass-bandpass triplexer without any extra matching networks. This is despite the fact that the number of literature on lowpass-bandpass triplexers that have been introduced so far is very low. The lowpass channel cut-off frequency is tuned at 1.85 GHz which makes it appropriate for mid-band 5G and GSM applications. The bandpass channels work at 3.25 GHz and 6.65 GHz for S-band, 5G, WiMAX and C-band applications. The designed triplexer occupies a compact area of 0.021 λg2. In comparison with the previously reported triplexers, the presented triplexer has three low insertion losses of 0.54 dB, 0.16 dB and 0.55 dB. Also, all its channels are flat with three low group delays of 0.79 ns, 0.98 ns and 0.85 ns. For verifying the designing technique and simulation results, we fabricated and measured our triplexer, where all the obtained results are close to each other.