Transmission Line Analysis of Slot Coupled Patch Antennas of Reduced Size

Mohamed HIMDI  Jean Pierre DANIEL  

IEICE TRANSACTIONS on Communications   Vol.E78-B    No.6    pp.932-934
Publication Date: 1995/06/25
Online ISSN: 
Print ISSN: 0916-8516
Type of Manuscript: LETTER
Category: Communication Networks and Service
microstrip antennas,  size reduction,  

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Recent works have shown that the size reduction of printed dipole antennas was possible thanks to a proper shaping of the radiating element. Following the same idea (choice of suitable shape), a shortened slot fed patch antenna exhibiting two step discontinuities, is described, analysed and optimized with a simple transmission line model. The shortening ratio (ρ) can reach 80% for matched antenna, printed on a substrate with a low dielectric constant (εr=2.2). The calculated results of input impedance are validated by experiment.