About the Beam Cosines and the Radiation Efficiency of a Multiport Antenna Array

2018 ◽  
Author(s):  
F. Broyde ◽  
E. Clavelier
Keyword(s):  
Antenna Array ◽  
Radiation Efficiency

Leaky-Wave Antenna Array With a Power-Recycling Feeding Network for Radiation Efficiency Improvement

2017 ◽  
Vol 65 (5) ◽  
pp. 2689-2694 ◽  
Author(s):  
Yunjie Geng ◽  
Junhong Wang ◽  
Yujian Li ◽  
Zheng Li ◽  
Meie Chen ◽  
...  
Keyword(s):  
Antenna Array ◽  
Radiation Efficiency ◽  
Efficiency Improvement ◽  
Leaky Wave ◽  
Leaky Wave Antenna ◽  
Wave Antenna

scholarly journals Design of Arbitrarily Shaped Planar Microstrip Antenna Arrays with Improved Efficiency

2013 ◽  
Vol 2013 ◽  
pp. 1-10 ◽  
Author(s):  
Sheng Ye ◽  
Xianling Liang ◽  
Wenzhi Wang ◽  
Junping Geng ◽  
Ronghong Jin ◽  
...  
Keyword(s):  
Antenna Array ◽  
Antenna Arrays ◽  
Microstrip Antenna ◽  
Radiation Efficiency ◽  
Circular Array ◽  
Design Technique ◽  
Antenna Aperture ◽  
Microstrip Antenna Array ◽  
Microstrip Array

A design technique is described for an arbitrarily shaped planar microstrip antenna array with improved radiation efficiency. In order to fully utilize the limited antenna aperture, several basic modules are proposed from which we construct the array. A consideration of the aperture shape shows that with several practical examples a proper combination of these basic modules not only allows the convenient design of arbitrarily-shaped microstrip array, but also helps to improve the aperture radiation efficiency. To confirm the feasibility of the approach, a circular array with 256 elements was constructed and fabricated. Both computed and measured aperture radiation results are compared and these demonstrate that the design technique is effective for arbitrarily-shaped planar microstrip arrays.

scholarly journals A Low VSWR and High Efficiency Waveguide Feed Antenna Array

2018 ◽  
Vol 2018 ◽  
pp. 1-7 ◽  
Author(s):  
Zhao Xiao-Fang ◽  
Liu Hua-Zhu ◽  
Li Yi ◽  
Zhou Shi-Gang ◽  
Chow-Yen-Desmond Sim
Keyword(s):  
Antenna Array ◽  
High Efficiency ◽  
Satellite Communications ◽  
Radiation Efficiency ◽  
Plane Waveguide ◽  
Antenna Gain ◽  
High Radiation ◽  
Milling Method ◽  
Array Fabrication ◽  
Ku Band

A low VSWR and high efficiency antenna array operating in the Ku band for satellite communications is presented in this paper. To achieve high radiation efficiency and broad enough bandwidth, all-metal radiation elements and full-corporate waveguide feeding network are employed. As the general milling method is used in the multilayer antenna array fabrication, the E-plane waveguide feeding network is adopted here to suppress the wave leakage caused by the imperfect connectivity between adjacent layers. A 4 × 8 elements array prototype was fabricated and tested for verification. The measured results of proposed antenna array show bandwidth of 6.9% (13.9–14.8 GHz) for VSWR < 1.5. Furthermore, antenna gain and efficiency of higher than 22.2 dBi and 80% are also exhibited, respectively.

scholarly journals Radiation Efficiency Improvement Method for Multifeed Circular Polarization Antenna Array with Mutual Coupling Effect

2014 ◽  
Vol 2014 ◽  
pp. 1-10 ◽  
Author(s):  
Zijian Xing ◽  
Ling Wang ◽  
Jianying Li ◽  
Kun Wei
Keyword(s):  
Circular Polarization ◽  
Antenna Array ◽  
Mutual Coupling ◽  
Coupling Effect ◽  
Design Method ◽  
Axial Ratio ◽  
Radiation Efficiency ◽  
Single Antenna ◽  
Negative Effect ◽  
Low Efficiency

In the circular polarization antenna array, the input impedance, axial ratio, and radiation pattern of antenna patch will be changed. Compared with the performances of single antenna, the mutual coupling also led to the low efficiency of all antennas. A novel radiation efficiency elevation method of multifeed circular polarization (CP) antenna array is demonstrated in this paper, in order to solve the problem. To prove the concept of novel method, dual-feed antenna with stubs is developed and fabricated. According to the measured results, each antenna would increase in efficiency by approximate 1dB by applying this novel design method. Therefore, this paper provides dramatically useful results of lessening the negative effect resulting in mutual coupling.

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