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A rigorous analysis of an aperture-coupled stacked microstrip antenna is described. Developed from a coupled integral equation set employing spectral-domain Green's functions, the analysis includes all coupling, radiation and surface-wave effects. Optimization of the patch dimensions yielded VSWR bandwidths of greater than 20%. Theoretical and measured responses exhibited excellent agreement.
This paper is dedicated to the design of circularly polarized dual off-center aperture-coupled Microstrip antenna for GPS application. First, the dimensions of the apertures and the square patch antenna are optimized. The global performance is then investigated after integrating a hybrid directional coupler. The return loss is better than 10 dB for a wide-band of 0.28 GHz whereas the realized gain...
A dual-band single-feed circularly polarized, S-shaped slotted patch antenna with a small frequency-ratio is proposed for GPS applications. An S-shaped slot is cut at the centre of a square patch radiator for dual-band operation. A single microstrip feed-line is underneath the center of the coupling aperture ground-plane. The frequency-ratio of the antenna can be controlled by adjusting the S-shaped...
Improvement in ellipticity bandwidth with an equilateral triangular shaped microstrip patch antenna is analyzed in this paper. The triangular patch is electromagnetically coupled using two orthogonally oriented bow tie shaped apertures fed by a 3dB 90deg hybrid for dual polarization operation. The radiating triangular patch has an optimized side length of 52.0 mm. The antenna is designed to transmit...
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