scholarly journals Mutual Coupling Effect in Unequally - Spaced Linear Antenna Array Performance

2020 ◽  
Vol 18 (12.2) ◽  
pp. 19
Author(s):  
Nguyen Thanh Binh ◽  
Nguyen Quoc Dinh ◽  
Yosihide Yamada
Keyword(s):  
Antenna Array ◽  
Mutual Coupling ◽  
Coupling Effect ◽  
Dipole Antenna ◽  
Field Calculation ◽  
Array Design ◽  
Unequally Spaced ◽  
Grating Lobe ◽  
Excitation Coefficient ◽  
Array Performance

Unequally-spaced arrays can offer some advantages over equally-spaced arrays as follows: reducing the side-lobed level for the broadband array with an identical excitation coefficient. However, array design techniques do not take into account the mutual coupling effect among elements. In this article, the effect of mutual coupling on the array radiation pattern is investigated and discussed through studying the input impedance of the elements. Next, a technique for reducingmutual coupling based on radiation patterns of elements is presented. In this technique, the log-periodic dipole antenna with a frequency ranging from 900 MHz to 2500 MHz is selected as an array element. The results based on the FEKO magnetic field calculation program have shown that at 900 MHz, the proposed antenna array reaches a side-lobed level of -17.4 dB. At frequencies of 1500 MHz, 2000 MHz, 2500 MHz, the grating lobe levels of this antenna array are lower than 6.7 dB, 9.5 dBand 8.3 dB compared to those of the equally - spaced antenna array.

scholarly journals PENGARUH MUTUAL COUPLING PADA BEAMFORMING ANTENA ARRAY

2020 ◽  
Vol 5 (1) ◽  
pp. 6
Author(s):  
Naufal Widya Gaspura ◽  
Dharu Arseno ◽  
Alloysius Adya Pramudita
Keyword(s):  
Antenna Array ◽  
Radiation Pattern ◽  
Mutual Coupling ◽  
Coupling Effect ◽  
Beam Direction ◽  
Antenna Radiation ◽  
Antenna Radiation Pattern ◽  
Grating Lobe

In the antenna array there is a mutual coupling effect. Mutual coupling causes a decrease in the characteristics of the antenna parameters. In this study, an analysis of the effect of mutual coupling on beamforming results was carried out. In this study, it was concluded that the effect of mutual coupling depends on the distance between the antenna elements. In the simulation for the beam pointing to 60 degrees, at a distance of lambda the resulting beam is shifted by 70%. Distance of 12 lambda, beam shifted 25% to 45 degrees. At 3 4 lambda distance, the beam is close to the desired result direction, 64 degrees to be precise, at the lambda distance there is a grating lobe effect. In the end, it was found that mutual coupling affects the beam direction which causes the antenna radiation pattern to change.

Optimal Antenna Matching and Mutual Coupling Effect of Antenna Array in MIMO Receiver

2007 ◽  
Vol E90-B (4) ◽  
pp. 960-967 ◽  
Author(s):  
H. IURA ◽  
H. YAMADA ◽  
Y. OGAWA ◽  
Y. YAMAGUCHI
Keyword(s):  
Antenna Array ◽  
Mutual Coupling ◽  
Coupling Effect

scholarly journals Mutual Coupling in Phased Arrays: A Review

2013 ◽  
Vol 2013 ◽  
pp. 1-23 ◽  
Author(s):  
Hema Singh ◽  
H. L. Sneha ◽  
R. M. Jha
Keyword(s):  
Mutual Coupling ◽  
Phased Arrays ◽  
Coupling Effect ◽  
Doa Estimation ◽  
Interference Rejection ◽  
Radiation Characteristics ◽  
Resolution Capability ◽  
Different Types ◽  
Signal Environment ◽  
Array Performance

The mutual coupling between antenna elements affects the antenna parameters like terminal impedances, reflection coefficients and hence the antenna array performance in terms of radiation characteristics, output signal-to-interference noise ratio (SINR), and radar cross section (RCS). This coupling effect is also known to directly or indirectly influence the steady state and transient response, the resolution capability, interference rejection, and direction-of-arrival (DOA) estimation competence of the array. Researchers have proposed several techniques and designs for optimal performance of phased array in a given signal environment, counteracting the coupling effect. This paper presents a comprehensive review of the methods that model and mitigate the mutual coupling effect for different types of arrays. The parameters that get affected due to the presence of coupling thereby degrading the array performance are discussed. The techniques for optimization of the antenna characteristics in the presence of coupling are also included.

MISC Array: A New Sparse Array Design Achieving Increased Degrees of Freedom and Reduced Mutual Coupling Effect

2019 ◽  
Vol 67 (7) ◽  
pp. 1728-1741 ◽  
Author(s):  
Zhi Zheng ◽  
Wen-Qin Wang ◽  
Yangyang Kong ◽  
Yimin D. Zhang
Keyword(s):  
Degrees Of Freedom ◽  
Mutual Coupling ◽  
Coupling Effect ◽  
Array Design ◽  
Sparse Array

scholarly journals Application of Novel Printed Dipole Antenna to Design Broadband Planar Phased Array

2014 ◽  
Vol 2014 ◽  
pp. 1-5 ◽  
Author(s):  
Jie Xu ◽  
Wenbin Dou
Keyword(s):  
Mutual Coupling ◽  
Phased Array ◽  
Coupling Effect ◽  
Dipole Antenna ◽  
Coaxial Cable ◽  
Impedance Bandwidth ◽  
Frequency Range ◽  
Dipole Antennas ◽  
Outer Conductor ◽  
Ground Plate

A broadband planar phased array consisting of 22 linear printed dipole antennas (PDA) is presented in this paper. The element is designed by a coax probe feeding mechanism with a ground plate configuration. The PDA with two arms placed on both sides of a substrate is realized. The inner conductor of the coaxial cable is connected to the PDA’s upper arm, and the outer conductor is connected to the PDA’s lower arm, so it eliminates the balun. The impedance bandwidth of the PDA array can be improved by increasing mutual coupling effect between the adjacent array elements. A dielectric layer, which is integrated on the surface of the antenna, is designed and fabricated to improve the impedance bandwidth and to shield the array. The measured results indicate the active VSWR is less than 3 over the frequency range of 4–20 GHz.

scholarly journals MUTUAL COUPLING EFFECT ON MIMO ANTENNA

2014 ◽  
pp. 247-250
Author(s):  
BHUSHAN R. KALAMKAR ◽  
SACHIN S. KHADE ◽  
B.L. BADJATE
Keyword(s):  
Antenna Array ◽  
Mutual Coupling ◽  
Mimo Systems ◽  
Coupling Effect ◽  
Ground Plane ◽  
Multiple Input Multiple Output ◽  
Correlation Coefficients ◽  
Mimo Antenna ◽  
Input Multiple Output ◽  
Plate Antenna

To reduce mutual coupling effect on MIMO Antenna this paper presents the analysis of bent ground plane antennas for multiple-input-multiple-output (MIMO). First, the three plate antenna array patterns of the envelope correlation coefficients are proposed to evaluate the diversity performance of antennas in MIMO systems. Following this, a compact three-element suspended plate antenna array with a bent ground plane is presented. The diversity performance of the design is experimentally and numerically analysed.

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