SELF AND MUTUAL ADMITTANCE OF SLOT ANTENNAS ON A DIELECTRIC HALF-SPACE

In this paper, an efficient implementation of the spectral domain moment technique is presented for computing the self and mutual coupling between slot antennas on a dielectric half-space. It is demonstrated that by the proper selection of the weighting functions in the method of moments, the analytic evaluation or simplification of the transverse moment integrals is enabled. This results into a significant reduction of the required computational labor. The method is then utilized in order to provide design data for the self and mutual admittances between two slot antennas on a dielectric substrate lens in the case of fused quartz (epsilon(r) = 3.80), crystal quartz (epsilon(r) = 4.53), silicon (epsilon(r) = 11.9) and GaAs (epsilon(r) = 12.8). The presented technique and associated results are useful when designing twin slot quasi-optical receivers, imaging arrays, phased arrays or power-combining arrays of slot elements at millimeter-wave frequencies.