Compact wide stopband microstrip diplexer with flat channels for WiMAX and wireless applications

A New Design Approach for a Compact Microstrip Diplexer with Good Passband Characteristics

“…In the comparison table, the data of these works: (Hussein, Mezaal and Alameri, 2021), (Yahya, Rezaei and Nouri, 2020), (Tahmasbi, Razaghian and Roshani, 2021), , (Shirkhar and Roshani, 2021), ), (Fernandez-Prieto, et al, 2018, and (Noori and Rezaei, 2017) are based on simulation results and the others are based on the measured results. As shown in Table I, our diplexer has low loss, compact size, good harmonic attenuation, and reasonable isolation.…”

“…As shown in Table I, our diplexer has low loss, compact size, good harmonic attenuation, and reasonable isolation. (Yahya, Rezaei and Nouri, 2020) 0.12, 0.18 21, 17 3.5, 5 0.037 12 f o1 20 (Lu, et al, 2020) 0.8, 1.1 ---0.755, 1.056 0.040 2.1 f o1 24 (Su, et al, 2020) 2.62, 2.34 ---9.55, 10.61 3.56 2.1 f o1 45 (Tahmasbi, Razaghian and Roshani, 2021) 0.05, 0.08 26.9, 23.5 1.5, 2.1 0.030 3.3 f o1 19 0…”

“…It could better suppress harmonics but the problem of high losses at both channels is remained. The proposed diplexer in (Yahya, Rezaei and Nouri, 2020) could improve the simulated insertion losses at both channels while it could suppress the harmonics very well. However, it has two high common port return losses at both channels.…”

“…Each channel is used for receiving or sending signals from an antenna (Majdi and Mezaal, 2022). Several types of microstrip diplexer are introduced in (Hussein, Mezaal and Alameri, 2021;Chen, et al, 2021;Yahya, Rezaei and Nouri, 2020;Lu, et al, 2020;Su, et al, 2020;Tahmasbi, Razaghian and Roshani, 2021;Shirkhar and Roshani, 2021;Zhanga, Zhu and Li, 2018;Rezaei, Yahya, Noori and Jamaluddin, 2019;Dembele, et al, 2019;Yousif and Ezzulddin, 2020;Fernandez-Prieto, et al, 2018;Guan, et al, 2019;Guan, et al, 2014;Noori and Rezaei, 2017). However, all of them occupy large area.…”

A Review on the Structure, Application and Performance of the Passive Microstrip Devices

“…M odern wireless communication systems widely need to microstrip passive devices such as filters, [1][2][3][4][5][6] diplexers, [7][8][9][10][11][12][13][14][15][16][17][18][19][20][21][22] multiplexers (triplexers [23][24][25][26][27][28][29][30] and quadruplexers, [31][32][33][34][35][36][37] five-channel multiplexer [38] ), and couplers. [39][40][41][42][43][44][45][46][47][48][49] For all of these passive devices, it is very necessary to have small dimensions, low insertion loss (IL), low return loss (RL), suppressed undesired harmonics, sharp roll-off at the edge of passbands (high frequency selectivity), etc.…”