Investigation of reduced height dual-polarized Archimedean spiral antennas with unidirectional radiation patterns

2015 ◽  
Author(s):  
A. M. Mehrabani ◽  
Lotfollah Shafai
Keyword(s):  
Radiation Patterns ◽  
Archimedean Spiral ◽  
Spiral Antennas ◽  
Reduced Height ◽  
Dual Polarized

scholarly journals A Compact Dual-Polarized 3:1 Bandwidth Omnidirectional Array of Spiral Antennas

2016 ◽  
Vol 15 ◽  
pp. 1909-1912 ◽  
Author(s):  
Regis Guinvarc'h ◽  
Mohammed Serhir ◽  
Fabrice Boust
Keyword(s):  
Spiral Antennas ◽  
Dual Polarized

Optical resonant Archimedean spiral antennas

2011 ◽  
Vol 5 (1) ◽  
pp. 053523 ◽  
Author(s):  
Hanqing Wen
Keyword(s):  
Archimedean Spiral ◽  
Spiral Antennas

scholarly journals A Broadband Differential-Fed Dual-Polarized Hollow Cylindrical Dielectric Resonator Antenna for 5G Communications

Sensors ◽  
2020 ◽  
Vol 20 (22) ◽  
pp. 6448
Author(s):  
Xiaosheng Fang ◽  
Kangping Shi ◽  
Yuxiang Sun
Keyword(s):  
Dielectric Resonator ◽  
Impedance Bandwidth ◽  
Antenna Gain ◽  
Dielectric Resonator Antenna ◽  
Radiation Patterns ◽  
Higher Order Modes ◽  
Dual Polarized ◽  
Broadside Radiation ◽  
K9 Glass ◽  
Better Than

A broadband differential-fed dual-polarized hollow cylindrical dielectric resonator antenna (DRA) is proposed in this article. It makes use of the HEM111, HEM113, and HEM115 modes of the cylindrical hollow DRA. The proposed DRA is simply fed by two pairs of conducting strips and each pair of strips is provided with the out-of-phase signals. After introducing four disconnected air holes into the DRA, a broadband characteristic is achieved, with little effect on the antenna gain of its higher-order modes. To verify this idea, frosted K9-glass is applied to fabricate the hollow cylindrical DRA. The differential S-parameters, radiation patterns, and antenna gain of the DRA are studied. It is found that the proposed differential-fed dual-polarized DRA is able to provide a broad differential impedance bandwidth of ~68% and a high differential-port isolation better than ~46 dB. Moreover, symmetrical broadside radiation patterns are observed across the whole operating band. The proposed DRA covers the frequency bands including the 5G-n77 (3.4–4.2 GHz), 5G-n79 (4.4–5.0 GHz), WLAN-5.2 GHz (5.15–5.35 GHz), and WLAN-5.8 GHz (5.725–5.825 GHz), which can be used for 5G communications.

scholarly journals Magnetoelectric Dipole Antenna with Dual Polarization and High Isolation

2018 ◽  
Vol 2018 ◽  
pp. 1-7
Author(s):  
Xujun Yang ◽  
Lei Ge ◽  
Dengguo Zhang ◽  
Chow-Yen-Desmond Sim
Keyword(s):  
Transmission Lines ◽  
Dipole Antenna ◽  
Cross Polarization ◽  
Radiation Patterns ◽  
Dual Polarization ◽  
High Isolation ◽  
Microstrip Lines ◽  
Directional Radiation ◽  
Dual Polarized ◽  
Coaxial Lines

A dual-polarized aperture-coupled magnetoelectric (ME) dipole antenna is presented in this paper. The feeding network is based on substrate-integrated coaxial lines (SICLs). To describe the effect of the SICL on improving the isolation, the ME dipole with another two different feeding configurations, microstrip lines and striplines, respectively, is compared. As such, the coupling between the transmission lines is tremendously reduced and the isolation between the two input ports of different polarization is enhanced. An antenna prototype is fabricated and tested, exhibiting good performances, including an isolation level of higher than 30 dB between the two input ports and gains of more than 9.5 dBi. Besides, the proposed design is capable of achieving stable directional radiation patterns with cross-polarization levels lower than −22 dB and back radiation levels lower than −24 dB.

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