Linear Pattern Correction in a Small Microstrip Antenna Array

Salonen, Ilkka; Toropainen, A.P.; Vainikainen, P.

doi:10.1109/tap.2004.823996

Cited by 21 publications

(17 citation statements)

References 27 publications

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“…A parallel resonator model has been used to explain the behavior of microstrip antenna elements [15][16][17][18]. The correction results in [3] using (1) are in accordance with the parallel model. In Fig.…”

Section: Resultsmentioning

confidence: 93%

“…3 we see the measured resonators, when the scattering matrix reference point is at the beginning of the feed probe of a coaxial SMA connector. In the correction done in [3] the reference point is shifted from the level presented in Fig. 3 further 23° towards the array resulting in a 45° shift on the Smith diagram.…”

Section: Resultsmentioning

confidence: 99%

“…4 and the element values for the three cases are given in Table I. The resulting pattern corrections in these cases are about the same as those in [3] and [4], where the reference plane was redefined and only a scattering matrix or its eigenstructure was used. In the cases A, B and C the resonance circles are moved to the location of the ideal resonance circle.…”

Section: Resultsmentioning

confidence: 99%

“…A matrix method can be used for the correction of the array inputs/outputs [1,2]. In addition to mutual coupling also the ground plane edge effect should be included in the correction of a microstrip array [3,4]. If the antenna elements in an array are purely voltage or current driven, the array pattern correction can be done with the impedance or admittance matrix [1,4].…”

Section: Introductionmentioning

confidence: 99%

“…If the antenna elements in an array are purely voltage or current driven, the array pattern correction can be done with the impedance or admittance matrix [1,4]. A circuit model for an antenna array is of interest for mutual coupling compensation [3]. When only the measured scattering matrix is known, it is a reverse problem.…”

Section: Introductionmentioning

confidence: 99%

See 4 more Smart Citations

Microstrip antenna circuit model and linear pattern correction

Salonen¹,

Icheln²,

Vainikainen³

2005

11th International Symposium on Antenna Technology and Applied Electromagnetics [ANTEM 2005]

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Abstract-Mutual coupling, among other effects, causes the element patterns in an antenna array to be different. In the practical adaptive use of the array identical element patterns are usually expected. Linear pattern correction with matrix multiplication can be used to correct the array element inputs/outputs. In this paper, a multiport model for a microstrip array and a method to find the input circuit for its ports is presented for use in the array correction.

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Section: Resultsmentioning

confidence: 93%

Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Microstrip antenna circuit model and linear pattern correction

Salonen¹,

Icheln²,

Vainikainen³

2005

11th International Symposium on Antenna Technology and Applied Electromagnetics [ANTEM 2005]

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Mutual coupling compensation of linear antenna array using evolutionary optimization technique

Dhali

Chakraborty²,

Ram

et al. 2022

Int J Communication

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This paper presents an optimization-based approach to compensate for the mutual coupling effect and to reduce the sidelobe level (SLL) of the normalized radiation pattern by optimizing the current excitation amplitude of the antenna array elements. Due to the mutual coupling effect, the SLL of the radiation pattern is increased, and thereby, the field pattern of the antenna array is severely degraded. This causes interference with other communication systems working at the same frequency. Toward the compensation of the mutual coupling effect and reduction of SLL, the Cat swarm optimization (CSO) algorithm is employed, and the excitation amplitudes of the antenna elements are optimized. In this regard, optimizing the cost function is defined by introducing the impedance factor (IF), calculated by using the self-impedance and mutual impedance of the antenna elements. The proposed method for the synthesis of a mutually coupled linear antenna array is less expensive, simpler to use, and more effective. Array sets of 4, 6, 8, and 10 elements are considered for optimization. K E Y W O R D Simpedance factor (IF), linear antenna array (LAA), mutual coupling, mutual impedance, sidelobe level (SLL)

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Antenna array pattern correlation and input type

2005

Self Cite

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When mutual coupling is present in an antenna array, the radiation patterns of the active elements as well as the pattern correlations depend on the representation of the input signal in terms of the input type. The pattern correlation is presented for different input types, i.e. for voltages, currents and voltage waves. It is shown for a microstrip array that a suitable choice of the reference plane of input voltages and currents can lead to a lower pattern correlation than for voltage waves.

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Linear Pattern Correction in a Small Microstrip Antenna Array

Cited by 21 publications

References 27 publications

Microstrip antenna circuit model and linear pattern correction

Microstrip antenna circuit model and linear pattern correction

Mutual coupling compensation of linear antenna array using evolutionary optimization technique

Antenna array pattern correlation and input type

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