The design of slot arrays including internal mutual coupling

2005 ◽  
Author(s):  
R. Elliott ◽  
W. O'Loughlin
Keyword(s):  
Mutual Coupling ◽  
Slot Arrays

scholarly journals Bandwidth Enhancement of Antenna Arrays Utilizing Mutual Coupling between Antenna Elements

2010 ◽  
Vol 2010 ◽  
pp. 1-9 ◽  
Author(s):  
Min Wang ◽  
Wen Wu ◽  
Zhongxiang Shen
Keyword(s):  
Reflection Coefficient ◽  
Antenna Arrays ◽  
Mutual Coupling ◽  
Coupling Effect ◽  
Approximate Expression ◽  
Scattering Parameters ◽  
Linear Superposition ◽  
Bandwidth Enhancement ◽  
Slot Arrays ◽  
Linear Antenna Arrays

The mutual coupling effect between antenna elements on an array's bandwidth is investigated using scattering parameters instead of the mutual impedance. First, an approximate expression is derived for matched voltage standing wave ratio (VSWR) bandwidth of a tuned antenna, which reveals that the bandwidth is inversely proportional to the magnitude|Γ0'(ω0)|of the frequency derivative of the reflection coefficient. Next, considering linear antenna arrays with corporate feed as an example, closed-form expressions of the reflection coefficient are derived at the input port of the feeding network, which shows that the active reflection coefficient of an array is the linear superposition of elements' passive reflection coefficientS11and the mutual coupling coefficientS12from adjacent elements. The VSWR bandwidth expressions for an array imply that bandwidth enhancement of the overall array can be achieved when the element passive reflection coefficientS11and mutual couplingS12are cancelled, as well as the frequency derivativesS11'andS12'also cancel each other. Slot arrays and a two-element Vivaldi array are investigated to verify the validity of our theoretical analysis. Numerical and experimental results are presented to successfully demonstrate the bandwidth enhancement of antenna arrays utilizing mutual coupling effect.

The design of slot arrays including internal mutual coupling

1986 ◽  
Vol 34 (9) ◽  
pp. 1149-1154 ◽  
Author(s):  
R. Elliott ◽  
W. O'Loughlin
Keyword(s):  
Mutual Coupling ◽  
Slot Arrays

scholarly journals Efficient Evaluation of the External Mutual Coupling in Dielectric-Covered Waveguide Slot Arrays

2012 ◽  
Vol 2012 ◽  
pp. 1-7 ◽  
Author(s):  
Zusheng Jin ◽  
Giorgio Montisci ◽  
Giovanni Andrea Casula ◽  
Hu Yang ◽  
Junqi Lu
Keyword(s):  
Mutual Coupling ◽  
Computation Time ◽  
Direct Calculation ◽  
Spatial Domain ◽  
Image Method ◽  
Efficient Procedure ◽  
Planar Arrays ◽  
Complex Image ◽  
Slot Arrays ◽  
Discrete Complex Image Method

An accurate and efficient procedure is devised to evaluate the mutual coupling in dielectric-covered planar arrays of longitudinal slots. This approach takes full advantage of the discrete complex image method to cast the spatial-domain Green's functions into closed forms, and hence a direct calculation of mutual coupling in the spatial-domain is available. The computation time reduces significantly compared to the previous spectral-domain procedure, without any loss in the accuracy, rendering this approach very attractive for the design of large dielectric-covered planar arrays.

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°).

Survey on Mutual Coupling Reduction Techniques for Imaging Radar Application

2014 ◽  
Vol 3 (3) ◽  
pp. 28-32
Author(s):  
C. Mekala ◽  
◽  
P. Saranya ◽  
V. Sathya Narayanan ◽  
◽  
...  
Keyword(s):  
Mutual Coupling ◽  
Imaging Radar ◽  
Reduction Techniques ◽  
Mutual Coupling Reduction

The Complete Mutual Coupling Analysis and Calibration for Conformal Arrays with Nonideal Ports Fed

2014 ◽  
Vol 35 (6) ◽  
pp. 1490-1495
Author(s):  
Fei Zhao ◽  
Sheng-shui Wang ◽  
Shun-lian Chai ◽  
Hui-ying Qi ◽  
Jian-qing Zhu
Keyword(s):  
Mutual Coupling ◽  
Coupling Analysis ◽  
Conformal Arrays
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