Performance Of Co-channel Dual Polarized Systems With Modern Antenna Design. Influence Of Antenna-XPD And XPIC-improvement Factor

2005 ◽  
Author(s):  
M. Glauner ◽  
M. Biester
Keyword(s):  
Antenna Design ◽  
Improvement Factor ◽  
Dual Polarized

scholarly journals A 28 GHz 2 × 2 Antenna Array with 10 Beams Using Passive SPDT Switch Beamforming Network

Sensors ◽  
2021 ◽  
Vol 21 (21) ◽  
pp. 7138
Author(s):  
Firas Abdul Abdul Ghani ◽  
Amir Mohsen Ahmadi Najafabadi ◽  
Heba Saleh ◽  
Murat Kaya Kaya Yapici ◽  
Ibrahim Tekin
Keyword(s):  
Antenna Array ◽  
Beam Steering ◽  
Ground Plane ◽  
Antenna Design ◽  
Main Beam ◽  
Impedance Bandwidth ◽  
Side Lobe Level ◽  
Compact Size ◽  
Dual Polarized ◽  
Switched Beams

In this paper, a dual-polarized four-port 2 × 2 series fed antenna array operating at 28 GHz with beam-switching capability is proposed. The antenna array uses a simple passive beamforming network to switch the main beam. The presented antenna design is suitable for 5G user equipment and high data rates applications by which it has a compact size with low cost and complexity. The size of the antenna is 37.2 × 37.2 mm2 including the ground plane, and it produces 10 different switched beams by using only two simple 3 dB/90∘ couplers which create the required amplitudes and phase excitations for the antenna elements. A one-port simple feeding mechanism including Peregrine PE42525 SPDT switch modules and a power divider is used to generate and measure the 10 switched beams. The antenna design is implemented on a two-layer 0.203 mm thick low-loss (tanδ = 0.0027) Rogers 4003C substrate, and it has a measured 10 dB impedance bandwidth of 4 GHz (14.3%, from 26 GHz to 30 GHz) for all ports. Measured peak isolation between any dual-polarized ports of the antenna is better than 30 dB. The antenna has an average measured realized gain of 8.9 dBi and around 10 dB side lobe level (SLL) for all beams. The antenna has 3-dB coverage of 80∘ to 90∘ in 2D space and it has a maximum of ±26∘ beam-steering angle. The antenna is designed and simulated using Ansys HFSS and fabricated using regular PCB processing.

scholarly journals An X-Band Dual-Polarized Vivaldi Antenna with High Isolation

2017 ◽  
Vol 2017 ◽  
pp. 1-9 ◽  
Author(s):  
Denghui Huang ◽  
Hu Yang ◽  
Yuqing Wu ◽  
Fei Zhao
Keyword(s):  
Antenna Design ◽  
High Isolation ◽  
X Band ◽  
Vivaldi Antenna ◽  
The Cross ◽  
Dual Polarized ◽  
Vivaldi Antennas ◽  
Better Than

An X-band dual-polarized Vivaldi antenna with high isolation is proposed. The procedure of this antenna design includes the conventional Vivaldi antenna with regular slot edge (RSE), the dual-polarized Vivaldi antenna with two Vivaldi antennas which have different feeding point positions in a cross-shaped form, and the two Vivaldi antennas with a galvanic contact in soldering point. By applying the RSE, it reduced the dimensions of the Vivaldi antenna and improved its radiation performance. The modified antenna is fabricated and measured. The measured results show that S11<-10 dB at the entire X-band for the two Vivaldi antennas. The isolation (S21) between the two feeding ports, which has been improved by applying the different feeding point positions and the galvanic contact in soldering point, is better than 34 dB at X-band. In addition, the cross-polarized discrimination is better than 21 dB for the two Vivaldi antennas, and the measured results also include the gain of two Vivaldi antennas.

scholarly journals COMPACT DUAL-POLARIZED QUAD-RIDGED UWB HORN ANTENNA DESIGN FOR BREAST IMAGING

2017 ◽  
Vol 72 ◽  
pp. 133-140 ◽  
Author(s):  
Dheyaa T. Al-Zuhairi ◽  
John M. Gahl ◽  
Naz E. Islam
Keyword(s):  
Breast Imaging ◽  
Horn Antenna ◽  
Antenna Design ◽  
Dual Polarized
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