Experimental study of mutual coupling compensation in smart antenna applications

Dandekar, Kapil R.; Líu, Hao; Xu, Guanghan

doi:10.1109/twc.2002.800546

Cited by 129 publications

(74 citation statements)

References 14 publications

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“…The effect of MC is taken into account by using a distortion matrix model [8][9][10][11][12][13][14]. According to this model, we insert a mutual coupling matrix (MCM) C in the data model for the received signal as follows:…”

Section: Performance Analyses Of Array Beamformers With MC Effectsmentioning

confidence: 99%

“…All signals received by an antenna array are affected by MC and the data will be no longer independent. The MC between the array sensors can significantly change an antenna array's behavior and its communication characteristics [9][10][11][12]. The predicted array system performances may not be accurate when we ignore the MC effects.…”

Section: Introductionmentioning

confidence: 99%

“…The predicted array system performances may not be accurate when we ignore the MC effects. Recently, research endeavor has been devoted to tackle the MC effect for improving the performance of an antenna array beamformer [8,10,12,13] and the performance of bearing estimation using a two-dimensional uniform circular array (2-D UCA) [26].…”

Section: Introductionmentioning

confidence: 99%

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Performance Analysis of Antenna Array Beamformers With Mutual Coupling Effects

Lee

Chen²

2011

PIER B

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Abstract-Antenna array beamformers suffer from performance deterioration in the presence of mutual coupling (MC) between array sensors. In this paper, we present a theoretical analysis in terms of the output signal-to-interference-plus-noise ratio (SINR) for the performance of antenna array beamformers under MC effects. Based on the model of a distortion matrix to encapsulate the MC effects, a closed-form expression for the SINR is derived that is shown to accurately predict the SINR obtained in simulations. This theoretical formula is valid for any distortion matrix estimated from collected measurement data. The SINR formulas provide insights into the influence of the MC effects on the performances of the linearly constrained minimum variance (LCMV) beamformer and the eigenspace-based (ESB) beamformer. It is shown that the ESB beamformer outperforms the LCMV beamformer under MC effects. Moreover, we derive the formulas for computing the eigenvalues of signal correlation matrix under MC effects. Simulation results are presented for confirming the validity of the theoretical results.

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Section: Performance Analyses Of Array Beamformers With MC Effectsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Performance Analysis of Antenna Array Beamformers With Mutual Coupling Effects

Lee

Chen²

2011

PIER B

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“…However, microstrip patch antennas in general suffer from surface wave excitation when they are mounted on a non-air substrate. Besides their contribution to power loss and reducing overall efficiency, excitation of surface waves eventually leads to undesired mutual coupling between elements of an array printed on the same substrate [1][2][3][4]. The diffraction of these surface waves at the edge of a finite-size ground plane results in a distorted radiation pattern.…”

Section: Introductionmentioning

confidence: 99%

A Pin-Loaded Microstrip Patch Antenna With the Ability to Suppress Surface Wave Excitation

AlAjmi¹,

Saed²

2016

PIER C

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Abstract-A circular microstrip patch antenna design is proposed for applications that require suppression of surface waves and lateral waves. The proposed design is composed of a circular patch loaded with a single shorting pin on a grounded inhomogeneous dielectric substrate with a desired effective permittivity. The modal equation for the normalized resonance frequency of this design is solved numerically. Simulated and measured radiation patterns show that a good reduction of surface waves and lateral waves is achieved. A comparison between the present work and an alternative design in the literature is presented in this paper. The proposed design could find applications in large patch antenna arrays where mutual coupling needs to be eliminated and in high-precision global positioning system receivers where multipath interfering signals associated with low-angle reflection affect position accuracy.

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“…For receiving antenna arrays, most of the available mutual coupling compensation methods [2,[5][6][7] are only usable over a limited range of frequencies since the accuracy of the coupling matrix varies with the frequency.…”

Section: Introductionmentioning

confidence: 99%

The Multiple Antenna Induced Emf Method for the Precise Calculation of the Coupling Matrix in a Receiving Antenna Array

Henault¹,

Antar²,

Rajan³

et al. 2009

PIER M

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Abstract-Practical antenna array designs generally require that the elements are separated by electrically short distances. The resultant mutual coupling often adversely affects the achievable performance. Various methods are available to quantify the effects of mutual coupling in arrays and improve performance through mutual coupling compensation. Mutual coupling is often described by a coupling matrix that relates the coupled and uncoupled quantities. Unfortunately, the accuracy with which the coupling matrix can be calculated is highly dependent on both the method selected and the frequency. This is a significant limitation for wideband analysis where the coupling matrix needs to be calculated accurately at all frequencies of interest. This paper introduces a novel method for the precise calculation of the coupling matrix at any frequency of interest. It is an extension of the induced EMF method to multiple array elements. The method has the important practical advantage of being independent of the numerical technique used in the analysis. Since the coupling matrix is calculated by exciting the elements in the transmission mode, the method resembles well-known network analysis. However, as outlined in the paper, there are subtle differences between the two approaches, which lead to more accurate results with the new proposed method. It is also demonstrated that antennas with arbitrary geometries and illuminations are handled accurately by the method.Corresponding author: S. Henault (henault@rmc.ca). 104Henault et al.

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Experimental study of mutual coupling compensation in smart antenna applications

Cited by 129 publications

References 14 publications

Performance Analysis of Antenna Array Beamformers With Mutual Coupling Effects

Performance Analysis of Antenna Array Beamformers With Mutual Coupling Effects

A Pin-Loaded Microstrip Patch Antenna With the Ability to Suppress Surface Wave Excitation

The Multiple Antenna Induced Emf Method for the Precise Calculation of the Coupling Matrix in a Receiving Antenna Array

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