A Practical Approach to Compensate for the Mutual Coupling Effect in an Adaptive Dipole Array

Hui, Hon Tat

doi:10.1109/tap.2004.827502

Cited by 105 publications

(77 citation statements)

References 12 publications

(27 reference statements)

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“…Case #1 shows the RMSE when the antenna is at h = 10λ, and we remove mutual coupling effects by using mutual impedance matrix measured over the same height. The RMSE is fairly low, which supports the applicability of the method presented in [21]. The critical situation is tested when the antenna is placed at h = 0.25λ, and the mutual impedance matrix is pre-estimated over h = 10λ, but surprisingly RMSE remains unchanged.…”

Section: Effects On Doa Estimationsupporting

confidence: 57%

Effects of Ground on Antenna Mutual Impedance for Doa Estimation Using Dipole Arrays

Ahmed¹,

Perger²

2014

PIER C

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Abstract-This paper investigates the effects on received mutual coupling of λ/2 dipole arrays placed near real-earth. As a rule of thumb, estimation of mutual coupling can be divided in two regions of antenna height that is very near ground 0 < h < λ and fairly freespace region h ≥ λ. The receiving antenna mutual coupling remains fairly unaffected from ground conductivity, when antenna height h ≥ λ. Both vertical and horizontal polarization cases showed the same trend. Investigation of effects of nearness of good-ground to the array on DOA estimation revealed that for azimuth DOA estimation, the proposed method of removing mutual coupling works well even for near ground.

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Section: Effects On Doa Estimationsupporting

confidence: 57%

Effects of Ground on Antenna Mutual Impedance for Doa Estimation Using Dipole Arrays

Ahmed¹,

Perger²

2014

PIER C

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“…By definition, the conventional mutual impedance is the ratio of the induced open-circuit voltage of one antenna to the exciting terminal current of the other antenna [1]- [3]. However, some recent studies [4]- [6] have shown that the conventional definition of mutual impedance cannot accurately measure the mutual coupling effect. One of the deficiencies of the conventional mutual impedance lies in its failure to take into account the direction information of the receiving signals because of the requirement of one of the antenna elements in the transmitting mode whereas in a receiving array, all antenna elements are in the receiving mode, being excited by external source(s).…”

Section: Introductionmentioning

confidence: 99%

A new definition of mutual impedance for application in dipole receiving antenna arrays

2004

Antennas Wirel. Propag. Lett.

103

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Abstract-A new definition of mutual impedance for two dipole antennas is introduced to characterize the mutual coupling effect between two dipole antennas in a more accurate manner. The calculation method and the measurement procedure for the new mutual impedance are given. Measurement and theoretical results on two monopole antennas were obtained as an example. The successful applications of the new mutual impedance in the compensation of mutual coupling effect in direction finding and adaptive interference suppression with significantly improved results showed the importance of the new mutual impedance.

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“…These three major differences substantiate the important extension to Carter's theory introduced in this paper. As already pointed out in [1,4] and [6][7][8], the concept of mutual impedances is inaccurate in estimating and compensating the effects of mutual coupling in receiving antenna arrays. The proposed MAIEM is therefore expected to yield superior performance to that of the open-circuit voltage method.…”

Section: The Multiple Antenna Induced Emf Methodsmentioning

confidence: 99%

“…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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A Practical Approach to Compensate for the Mutual Coupling Effect in an Adaptive Dipole Array

Cited by 105 publications

References 12 publications

Effects of Ground on Antenna Mutual Impedance for Doa Estimation Using Dipole Arrays

Effects of Ground on Antenna Mutual Impedance for Doa Estimation Using Dipole Arrays

A new definition of mutual impedance for application in dipole receiving antenna arrays

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

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