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Planar microstrip patch antennas can achieve a wide range of radiation patterns. However, due to surface-wave losses, they have low bandwidth, low gain, and a potential decrease in radiation efficiency. In order to minimize the surface-wave effects, a photonic band gap (PBG) substrate is proposed. The PBG structure significantly diminishes the surface-wave modes and thus improves the gain and far-field radiation pattern and efficiency. Using FDTD, an accurate full wave analysis of surface wave propagation in a rectangular microstrip patch antenna with and without PBG is presented.
Antennas and Propagation Society International Symposium, 2005 IEEE (Volume:1A )
Date of Conference: 3-8 July 2005