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Computation of mutual coupling between slot-coupled microstrip patches in a finite array

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2 Author(s)
Sheng-Gen Pan ; Dept. of Electr. Eng., Duisburg Univ., Germany ; Wolff, I.

An analytical method is presented for the evaluation of mutual coupling between slot-coupled microstrip patches in a finite array. The approach is a combination of the equivalence principle and the reciprocity theorem and uses the spectral domain Green's functions for a dielectric slab in a moment method solution for the unknown patch and slot current distribution. The excitation mechanism of the patches is taken into account by introducing an N-port equivalent network, and the impedance matrix of an array of N-element slot-coupled patches is evaluated directly from its network voltage and current matrices of order N2. As examples, the mutual impedances and scattering coefficients for two-, four-, and eight-element arrays are evaluated. Results are compared with measured data

Published in:

Antennas and Propagation, IEEE Transactions on  (Volume:40 ,  Issue: 9 )