Title :
PBG-assisted gain enhancement of patch antennas on high-dielectric constant substrate
Author :
Yang, F.R. ; Coccioli, R. ; Qian, Y. ; Itoh, T.
Author_Institution :
Dept. of Electr. Eng., California Univ., Los Angeles, CA, USA
Abstract :
The previously developed uniplanar compact PBG (UC-PBG) substrate is successfully used to reduce surface wave losses of a patch antenna on a high-dielectric constant substrate. The surface wave dispersion diagram of the UC-PBG substrate has been numerically computed and found to have a complete bandgap in the range of frequency 10.9-13.5 GHz. This feature is exploited to enhance both bandwidth and broadside gain of a patch antenna working at the frequency 11.5 GHz in the forbidden bandgap. Measured results show a 2.8 dB higher radiation in the broadside direction than that of a standard patch antenna built on the same high-permittivity grounded dielectric slab.
Keywords :
dispersion (wave); microstrip antennas; microwave antennas; permittivity; photonic band gap; 10.9 to 13.5 GHz; PBG-assisted gain enhancement; SHF; UC-PBG substrate; bandwidth; broadside gain; forbidden bandgap; high-dielectric constant substrate; high-permittivity grounded dielectric slab; measured results; patch antennas; photonic band gap; surface wave dispersion diagram; surface wave losses reduction; uniplanar compact PBG; Antenna measurements; Bandwidth; Dielectric measurements; Dielectric substrates; Frequency; Measurement standards; Patch antennas; Photonic band gap; Slabs; Surface waves;
Conference_Titel :
Antennas and Propagation Society International Symposium, 1999. IEEE
Conference_Location :
Orlando, FL, USA
Print_ISBN :
0-7803-5639-x
DOI :
10.1109/APS.1999.788333
