Referenced Items are not available for this document.
A method is presented to enhance the flat-gain, the return-loss, and the axial-ratio bandwidths of a probe-fed circularly polarized (CP) microstrip patch antenna. The antenna occupies a volume of 124 × 117 × 33.2 mm3 (the ground plane is excluded). Bandwidths are widened by making use of an opposite shift on the inner and outer contours of a stacked ring, at an equal distance relative to the patch's boundary. The antenna is implemented in the ultrahigh frequency band for the radio frequency identification (RFID) system. The measured 10-dB return-loss bandwidth is 16.4% (835-975 MHz), and the 3-dB axial-ratio bandwidth is 7.7% (870-940 MHz). The gain is about 7 dBic within the overlapped bandwidth.
Published in:
Antennas and Wireless Propagation Letters, IEEE
(Volume:11
)
Date of Publication: 2012
- Page(s):
- 26 - 29
- ISSN :
- 1536-1225
- INSPEC Accession Number:
- 12615354
- Digital Object Identifier :
- 10.1109/LAWP.2011.2182174
- Product Type:
- Journals & Magazines
- Date of Publication :
- 30 December 2011
- Date of Current Version :
- 19 March 2012
- Issue Date :
- 2012
- Sponsored by :
- IEEE Antennas and Propagation Society
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