Improved compensation for the mutual coupling effect in a dipole array for direction finding

Hui, Hon Tat

doi:10.1109/tap.2003.816303

Cited by 134 publications

(115 citation statements)

References 10 publications

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“…The current distribution, I(z), is often assumed to be sinusoidal in amplitude and to have a constant phase [10]. Using this assumption, analytical equations can be derived to obtain (6). Unfortunately, the assumption is only valid for an asymptotically thin wire over a limited range of frequencies.…”

Section: The Induced Emf Methodsmentioning

confidence: 99%

“…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%

See 2 more Smart Citations

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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Section: The Induced Emf Methodsmentioning

confidence: 99%

Section: The Multiple Antenna Induced Emf Methodsmentioning

confidence: 99%

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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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“…Numerical values of received mutual coupling of dipole array for DOA estimation are in the literature [16]. The operating environment for [16] is presumably free space.…”

Section: Introductionmentioning

confidence: 99%

“…Numerical values of received mutual coupling of dipole array for DOA estimation are in the literature [16]. The operating environment for [16] is presumably free space. However, the actual-ground or earth has finite values of constituent parameters which are certain to have impact on mutual coupling.…”

Section: Introductionmentioning

confidence: 99%

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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Mutual Coupling in Beamforming and Interferometric Antennas

Lui

Bird²

2021

Mutual Coupling Between Antennas

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Improved compensation for the mutual coupling effect in a dipole array for direction finding

Cited by 134 publications

References 10 publications

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

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

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

Mutual Coupling in Beamforming and Interferometric Antennas

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