Wideband dual-polarized omnidirectional antenna with very high isolation across 1.65–2.7 GHz

2014 ◽  
Author(s):  
Ersin Yetisir ◽  
Chi-Chih Chen ◽  
John L. Volakis
Keyword(s):  
High Isolation ◽  
Omnidirectional Antenna ◽  
Dual Polarized ◽  
Very High

scholarly journals Wideband Dual-Polarized Quasi-Omnidirectional Antenna with High Isolation for Mobile Applications in High-Speed Vehicles

2019 ◽  
Vol 2019 ◽  
pp. 1-8
Author(s):  
Peng Luo ◽  
Chengguo Nie ◽  
Qing Gong ◽  
Yuehui Cui
Keyword(s):  
Mobile Applications ◽  
High Speed ◽  
Impedance Bandwidth ◽  
Horizontal Polarization ◽  
Vertical Polarization ◽  
High Isolation ◽  
Omnidirectional Antenna ◽  
Vertical Slot ◽  
Dual Polarized ◽  
Very High

A new wideband dual-polarized (DP) quasi-omnidirectional antenna is proposed. The DP antenna consists of a vertical slot for horizontal polarization (HP) and a folded horizontal slot for vertical polarization (VP). A tapered strip is employed to coupling feed the vertical slot while a straight strip is used to excite the horizontal slot. Due to the coupling feed and the orthogonality between the vertical and horizontal slots, the DP antenna features a wide bandwidth and a very high isolation. The simulated isolation is higher than 70 dB, although the measured isolation is about 50 dB. As experimental results indicate, the DP antenna realizes an impedance bandwidth (BW) of 45% (1.7–2.73 GHz) with quasi-omnidirectional radiation patterns for both HP and VP. The DP quasi-omnidirectional antenna may be packaged into a radome with a shape of a blade for mobile applications in high-speed vehicles.

scholarly journals Dual-Polarized Omnidirectional Antenna With High Isolation Based on the Theory of Characteristic Modes

IEEE Access ◽  
2018 ◽  
Vol 6 ◽  
pp. 73416-73422
Author(s):  
Xi Wang Dai ◽  
Guo Qing Luo ◽  
Ya Hui Qian ◽  
Xiao Hong Zhang ◽  
Hua Yan Jin ◽  
...  
Keyword(s):  
High Isolation ◽  
Omnidirectional Antenna ◽  
Characteristic Modes ◽  
Dual Polarized

scholarly journals DESIGN AND ANALYSIS OF A BROADBAND HIGH ISOLATION DUAL-POLARIZED OMNIDIRECTIONAL ANTENNA

2019 ◽  
Vol 85 ◽  
pp. 65-83
Author(s):  
Yuwei Zhang ◽  
Shu Lin ◽  
Shang Yu ◽  
Shoulan Liu ◽  
Guanjun Liu ◽  
...  
Keyword(s):  
High Isolation ◽  
Omnidirectional Antenna ◽  
Dual Polarized

scholarly journals WIDEBAND DUAL-POLARIZED OMNIDIRECTIONAL ANTENNA WITH HIGH ISOLATION FOR INDOOR DAS APPLICATIONS

2016 ◽  
Vol 61 ◽  
pp. 105-113 ◽  
Author(s):  
Lei Zhou ◽  
Yong-Chang Jiao ◽  
Zi-Bin Weng ◽  
Yihong Qi ◽  
Tao Ni
Keyword(s):  
High Isolation ◽  
Omnidirectional Antenna ◽  
Dual Polarized

Dual-polarized slot-coupled microstrip antenna with very high isolation

2005 ◽  
Vol 9 (4) ◽  
pp. 336-338 ◽  
Author(s):  
Shun-shi Zhong ◽  
Xian-ling Liang ◽  
Wei Wang
Keyword(s):  
Microstrip Antenna ◽  
High Isolation ◽  
Dual Polarized ◽  
Very High

Review on Switches for Power Applications: Macro to Micro

2019 ◽  
Vol 12 (3) ◽  
pp. 200-209
Author(s):  
Femi Robert
Keyword(s):  
Leakage Current ◽  
Power Loss ◽  
Low Cost ◽  
Electrical System ◽  
High Isolation ◽  
Fast Switching ◽  
Environmental Friendly ◽  
State Resistance ◽  
Very High ◽  
Bulk Production

Background: Switches are important component in electrical system. The switches needs to have the advantages of low ON-state resistance, very high OFF-state resistance, high isolation, no leakage current, less power loss, fast switching, high linearity, small size, arcless and low cost in bulk production. Also these switches have to be reliable and environmental friendly. Methods: In this paper, macro and microswitches for power applications are extensively reviewed and summarized. Various types of switches such as mechanical, solid-state, hybrid and micromechanical switches have been used for power applications are reviewed. The importance and challenge in achieving arcless switching is presented. Results: The use of micromechanical switches for power applications, actuation techniques, switching modes, reliability and lifetime are also reviewed. The modeling and design challenges are also reviewed. Conclusion: The applications of micromechanical switches shows that the switches can reduce the leakage current in battery operated systems and reduce the size of the system considerably.

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