Sidelobe level distribution computation for antenna arrays with arbitrary element distributions

2011 ◽  
Author(s):  
Siddhartha Krishnamurthy ◽  
Daniel W. Bliss ◽  
Vahid Tarokh
Keyword(s):  
Antenna Arrays ◽  
Arbitrary Element ◽  
Sidelobe Level

Influence of the Aperture Edge Diffraction Effects on the Mutual Coupling Compensation Technique in Small Planar Antenna Arrays

2011 ◽  
Vol 57 (1) ◽  
pp. 115-120 ◽  
Author(s):  
Mariusz Zamłyński ◽  
Piotr Słobodzian
Keyword(s):  
Antenna Arrays ◽  
Mutual Coupling ◽  
Planar Antenna ◽  
Sidelobe Level ◽  
Edge Diffraction ◽  
Narrow Angle ◽  
Compensation Technique ◽  
Diffraction Effects ◽  
Linear Antenna Arrays

Influence of the Aperture Edge Diffraction Effects on the Mutual Coupling Compensation Technique in Small Planar Antenna Arrays In this paper the quality of a technique to compensate for mutual coupling (and other phenomena) in small linear antenna arrays is investigated. The technique consists in calculation of a coupling matrix, which is than used to determine corrected antenna array excitation coefficients. Although the technique is known for more than 20 years, there is still very little information about how different phenomena existing in a real antenna arrays influence its performance. In this paper two models of antenna arrays are used. In the first model the effect of mutual coupling is separated from the aperture edge diffraction. In the second model antenna both mutual coupling and aperture edge diffraction effects are included. It is shown that mutual coupling itself can be compensated very well and an ultralow sidelobe level (i.e. -50 dB) could be achieved in practice. In the presence of diffraction effects -46.3 dB sidelobe level has been attained, but radiation pattern can be controled only in narrow angle range (i.e. up to ±60°).

scholarly journals Circularly Polarized Dielectric Resonator Antenna Arrays with Fractal Cross-Slot-Coupled DRA Elements

2017 ◽  
Vol 2017 ◽  
pp. 1-11 ◽  
Author(s):  
Jia-Hong Lin ◽  
Wen-Hui Shen ◽  
Zhi-Dong Shi ◽  
Shun-Shi Zhong
Keyword(s):  
Antenna Arrays ◽  
Dielectric Resonator ◽  
Design Procedure ◽  
Axial Ratio ◽  
Array Element ◽  
Dielectric Resonator Antenna ◽  
Sidelobe Level ◽  
Circularly Polarized ◽  
Low Sidelobe

In the design of circularly polarized (CP) dielectric resonator antenna (DRA) arrays, the regular-shaped DRAs with simple feeding configurations are mostly used as array elements to make the design procedure more efficient. However, such array element DRA usually achieves only about 6% axial ratio (AR) bandwidth. In this paper, a CP DRA element coupled by a fractal cross-slot which can radiate efficiently and excite the rectangular DRA simultaneously is considered. By adjusting the dimensions of the fractal cross-slot properly, the resonances of the fractal cross-slot and the dielectric resonator can be merged to obtain a wider AR bandwidth. Based on the proposed fractal cross-slot-coupled CP DRA element, two different CP DRA arrays are designed: a wideband CP DRA array and a low-sidelobe-level (SLL) CP DRA array. The designed DRA arrays are fabricated and measured, and structures and performances of the arrays are presented and discussed.

Circularly Polarized Switched-Beam Antenna Arrays With Reduced Sidelobe Level

2016 ◽  
Vol 15 ◽  
pp. 1213-1216 ◽  
Author(s):  
Izabela Slomian ◽  
Krzysztof Wincza ◽  
Slawomir Gruszczynski
Keyword(s):  
Antenna Arrays ◽  
Sidelobe Level ◽  
Circularly Polarized
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