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

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.

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 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

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.

Analysis and implementation of 3D bandpass frequency selective structure with high frequency selectivity

2017 ◽  
Vol 53 (5) ◽  
pp. 324-326 ◽  
Author(s):  
Keya Tao ◽  
Bo Li ◽  
Yiming Tang ◽  
Ming Zhang ◽  
Yaming Bo
Keyword(s):  
High Frequency ◽  
Frequency Selectivity ◽  
Frequency Selective

Design of filtering power divider with high frequency selectivity

2018 ◽  
Vol 60 (7) ◽  
pp. 1649-1653 ◽  
Author(s):  
Kai‐Da Xu ◽  
Yecheng Bai ◽  
Chunhui Zhu ◽  
Yanhui Liu
Keyword(s):  
High Frequency ◽  
Frequency Selectivity ◽  
Power Divider

Capacitive and ohmic RF NEMS switches based on vertical carbon nanotubes

2010 ◽  
Vol 2 (5) ◽  
pp. 433-440 ◽  
Author(s):  
A. Ziaei ◽  
M. Charles ◽  
M. Le Baillif ◽  
S. Xavier ◽  
A. Caillard ◽  
...  
Keyword(s):  
Ohmic Contact ◽  
High Frequency ◽  
Simulation Software ◽  
Operating Voltage ◽  
60 Ghz ◽  
Deposition Method ◽  
Rf Switch ◽  
High Isolation ◽  
Contact Switch ◽  
Walled Cnts

The objective is to demonstrate a reproducible carbon nanotube (CNT)-based technology for radio frequency (RF) switch working in the range of 40–60 GHz and fulfilling the specifications: low losses, high isolation, and an operating voltage below 30 V. The first processed component had an operating voltage of 14 V for an ohmic contact in a Nano-Electro Mechanical System (NEMS) tweezer design. This result is confirmed by theory with an operating voltage of 13 V. A capacitive-contact NEMS is also developed using multi-walled CNTs (MWCNTs) coated with a SiO2 dielectric layer deposited by electron beam induced deposition method (EBID). High Frequency Simulation Software (HFSS) RF-simulation on an innovative NEMS geometry shows encouraging results with transmission ratios between “on” state and “off” state up to 34% for ohmic-contact switch and 25% for a capacitive-contact switch.

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