scholarly journals High-Isolation Diplexer With High Frequency Selectivity Using Substrate Integrate Waveguide Dual-Mode Resonator

IEEE Access ◽  
2019 ◽  
Vol 7 ◽  
pp. 116676-116683 ◽  
Author(s):  
Kaijun Song ◽  
Yedi Zhou ◽  
Yuxuan Chen ◽  
Abdiqani Mohamed Iman ◽  
Shema Richard Patience ◽  
...  
Keyword(s):  
High Frequency ◽  
Frequency Selectivity ◽  
Dual Mode ◽  
High Isolation ◽  
Mode Resonator

Compact bandpass-filtering response power divider with high-frequency selectivity and high isolation

2019 ◽  
Vol 11 (08) ◽  
pp. 755-760
Author(s):  
Jiawei Li ◽  
Kaijun Song ◽  
Fei Xia ◽  
Shema Richard Patience ◽  
Song Guo ◽  
...  
Keyword(s):  
Slow Wave ◽  
High Frequency ◽  
Reasonable Agreement ◽  
Frequency Selectivity ◽  
Power Divider ◽  
Dual Mode ◽  
High Isolation ◽  
Wave Characteristics ◽  
Capacitive Load

AbstractA compact high-isolation power divider with bandpass response and high-frequency selectivity is presented in this letter. Two dual-mode resonators are used to realize filtering response. The circuit size of the proposed power divider can be reduced by using dual-mode capacitance loaded square meander loop resonators. Due to capacitive load, the resonator can exhibit slow-wave characteristics, which can be utilized to suppress harmonics and reduce size. The simulated and measured results show reasonable agreement.

Compact Bandpass-Filtering Response Power Dividers with High Isolation and High Frequency Selectivity

2017 ◽  
Vol 37 (1) ◽  
pp. 73-79 ◽  
Author(s):  
Kaijun Song ◽  
Fan Zhang ◽  
Yu Zhu ◽  
Maoyu Fan ◽  
Yong Fan
Keyword(s):  
High Frequency ◽  
Frequency Selectivity ◽  
Power Dividers ◽  
High Isolation

High-isolation diplexer based on dual-mode substrate integrated waveguide resonator

2019 ◽  
Vol 12 (4) ◽  
pp. 288-292
Author(s):  
Kaijun Song ◽  
Mou Luo ◽  
Cuilin Zhong ◽  
Yuxuan Chen
Keyword(s):  
Fourth Order ◽  
Equivalent Circuits ◽  
Substrate Integrated Waveguide ◽  
Waveguide Resonator ◽  
Dual Mode ◽  
Third Order ◽  
High Isolation ◽  
Operating Modes ◽  
Mode Resonator

AbstractA high-isolation diplexer based on a dual-mode substrate integrated waveguide (SIW) resonator is proposed in this paper. Based on the theory of the dual-mode resonator, the miniaturized diplexers are designed by using the SIW dual-mode resonators. The superior isolation of the diplexers is obtained because the two operating modes of the dual-mode SIW resonators are not directly coupled and there is no interference with each other. In order to further improve the isolation of the circuit, the number of the order of the diplexer is added. Equivalent circuits are given to analyze and design the dual-mode high-isolation diplexers. Detailed analyses are given according to the equivalent circuits. The dual-mode third-order and fourth-order diplexers are designed and fabricated. The measured results agree well with the simulated ones. The total sizes of the fabricated third-order and fourth-order diplexers are 1.78λg × 2.64λg and 1.79λg × 3.63λg, respectively.

High-isolation diplexing power divider with high-frequency selectivity

2020 ◽  
Vol 40 (3) ◽  
pp. 217-225
Author(s):  
Yuchen Yan ◽  
Kaijun Song ◽  
Yuxuan Chen
Keyword(s):  
High Frequency ◽  
Frequency Selectivity ◽  
Power Divider ◽  
High Isolation

scholarly journals A Compact Four-Port Coplanar Antenna Based on an Excitation Switching Reconfigurable Mechanism for Cognitive Radio Applications

2019 ◽  
Vol 9 (15) ◽  
pp. 3157 ◽  
Author(s):  
O ◽  
Jin ◽  
Choi
Keyword(s):  
Cognitive Radio ◽  
High Frequency ◽  
Coplanar Waveguide ◽  
Low Frequency ◽  
Loop Antenna ◽  
Ultra Wideband ◽  
Frequency Range ◽  
Uwb Antenna ◽  
High Isolation ◽  
Loop Antennas

In this paper, we propose a compact four-port coplanar antenna for cognitive radio applications. The proposed antenna consists of a coplanar waveguide (CPW)-fed ultra-wideband (UWB) antenna and three inner rectangular loop antennas. The dimensions of the proposed antenna are 42 mm × 50 mm × 0.8 mm. The UWB antenna is used for spectrum sensing and fully covers the UWB spectrum of 3.1–10.6 GHz. The three loop antennas cover the UWB frequency band partially for communication purposes. The first loop antenna for the low frequency range operates from 2.96 GHz to 5.38 GHz. The second loop antenna is in charge of the mid band from 5.31 GHz to 8.62 GHz. The third antenna operates from 8.48 GHz to 11.02 GHz, which is the high-frequency range. A high isolation level (greater than 17.3 dB) is realized among the UWB antenna and three loop antennas without applying any additional decoupling structures. The realized gains of the UWB antenna and three loop antennas are greater than 2.7 dBi and 1.38 dBi, respectively.

Design of fourth-order dual-band superconducting filter using dual-mode resonator

2017 ◽  
Author(s):  
Baoping Ren ◽  
Haiwen Liu ◽  
Pin Wen ◽  
Xuehui Guan ◽  
Zhewang Ma
Keyword(s):  
Fourth Order ◽  
Dual Band ◽  
Dual Mode ◽  
Mode Resonator
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