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 Dual Polarized Dual Fed Vivaldi Antenna for Cellular Base Station Operating at 1.7–2.7 GHz

2017 ◽  
Vol 2017 ◽  
pp. 1-8
Author(s):  
Marko Sonkki ◽  
Sami Myllymäki ◽  
Jussi Putaala ◽  
Eero Heikkinen ◽  
Tomi Haapala ◽  
...  
Keyword(s):  
Base Station ◽  
Performance Criteria ◽  
Impedance Bandwidth ◽  
Total Efficiency ◽  
Antenna Structure ◽  
Radiating Element ◽  
Vivaldi Antenna ◽  
Dual Polarized ◽  
Vivaldi Antennas ◽  
Better Than

The paper presents a novel dual polarized dual fed Vivaldi antenna structure for 1.7–2.7 GHz cellular bands. The radiating element is designed for a base station antenna array with high antenna performance criteria. One radiating element contains two parallel dual fed Vivaldi antennas for one polarization with 65 mm separation. Both Vivaldi antennas for one polarization are excited symmetrically. This means that the amplitudes for both antennas are equal, and the phase difference is zero. The orthogonal polarization is implemented in the same way. The dual polarized dual fed Vivaldi is positioned 15 mm ahead from the reflector to improve directivity. The antenna is designed for -14 dB impedance bandwidth (1.7–2.7 GHz) with better than 25 dB isolation between the antenna ports. The measured total efficiency is better than -0.625 dB (87%) and the antenna presents a flat, approximately 8.5 dB, gain in the direction of boresight over the operating bandwidth whose characteristics promote it among the best antennas in the field. Additionally, the measured cross polarization discrimination (XPD) is between 15 and 30 dB and the 3 dB beamwidth varies between 68° and 75° depending on the studied frequency.

scholarly journals Broadband Dual-Polarized Multidipole Antenna for Base Station Applications

2021 ◽  
Vol 2021 ◽  
pp. 1-8
Author(s):  
Yuxuan Huang ◽  
Zeqi Zhu ◽  
Shuting Cai ◽  
Xiaoming Xiong ◽  
Yuan Liu
Keyword(s):  
Radiation Pattern ◽  
Base Station ◽  
Impedance Bandwidth ◽  
Frequency Bandwidth ◽  
Frequency Range ◽  
High Isolation ◽  
Small Rectangle ◽  
Additional Resonance ◽  
Dual Polarized ◽  
Better Than

A wideband dual-polarized multidipole antenna for base station applications is proposed. It consists of a pair of large square-shaped loop dipoles and a pair of small rectangle loop dipoles as radiation elements. A pair of small rectangle loop dipoles is fed by T-shaped feed structure which is in the large square-shaped loop dipoles radiating arm so that the antenna generates an additional resonance and obtains a wider bandwidth. The proposed antenna was fabricated and measured, and the results show that the antenna achieves a wide impedance bandwidth of 63.7 % with VSWR<1.5 covering the frequency range from 1.55 to 3 GHz. A high isolation is better than 29 dB within the operating frequency bandwidth. Moreover, an average gain 8 dBi and a stable radiation pattern with 3 dB beamwidth of 69° ± 4° at H-plane are obtained.

scholarly journals Ladder Arrangement Method for Stealth Design of Vivaldi Antenna Array

2013 ◽  
Vol 2013 ◽  
pp. 1-7 ◽  
Author(s):  
XiaoXiang He ◽  
SaiSai Huang ◽  
Teng Chen ◽  
Yang Yang
Keyword(s):  
Antenna Array ◽  
Antenna Arrays ◽  
Design Method ◽  
Radiation Patterns ◽  
X Band ◽  
S Parameters ◽  
Vivaldi Antenna ◽  
Element Array ◽  
Vivaldi Antennas ◽  
Radiation Direction

A novel stealth design method for X-band Vivaldi antenna arrays is proposed in this paper by ladder arrangement along radiation direction. Two-element array, eight-element array, and 3 × 7-element array are investigated in this paper. S parameters, RCSs, and radiation patterns are studied, respectively. According to the ladder arrangement of Vivaldi antennas presented, 16.3 dBsm maximal RCS reduction is achieved with satisfied radiation performance. As simulated and measured, results demonstrate that the effectiveness of the presented low RCS design method is validated.

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