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Effect of a Finite Substrate on the Mutual Coupling of a Pair of Microstrip Patch Antennas along the H-plane  

Kim, Gun-Su (Soongsil University)
Kim, Tae-Young (Soongsil University)
Kim, Boo-Gyoun (Soongsil University)
Publication Information
Abstract
In this paper, the effect of a finite substrate on the mutual coupling of a pair of microstrip patch antennas along the H -plane is investigated. The mutual coupling of a pair of microstrip patch antennas can be reduced using the interference effect due to the phase difference by a variety of routes of the surface wave. In the case of the substrate with $\varepsilon_r$=10 and thickness of 3.2 mm, the mutual coupling is reduced by 4.85 dB on the substrate size with the strong mutual coupling, while the mutual coupling is reduced by 34.28 dB on the substrate size with the weak mutual coupling when the distance between the antenna centers is varied from 0.5 $\lambda_0$ to 1.0 $\lambda_0$. In the case of optimization substrate size, the decreasing rate of the mutual coupling with the increase of the distance between the antenna centers is very large. Good agreements between the image method and full wave simulation results are obtained.
Keywords
Microstrip patch antennas; Phased array antenna; Mutual coupling; Image method; Finite grounded substrate;
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Times Cited By KSCI : 1  (Citation Analysis)
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