期刊名称：International Journal of Antennas and Propagation
印刷版ISSN：1687-5869
电子版ISSN：1687-5877
出版年度：2007
卷号：2007
DOI：10.1155/2007/76793
出版社：Hindawi Publishing Corporation
摘要：A broadband circularly polarized stacked probe-fed
antenna suitable for UHF RFID applications is presented and studied. The
proposed antenna is fed by two probes which are connected to a hybrid coupler.
Two parasitic patches are stacked above a primary probe-fed patch to enhance the
bandwidth of the antenna. The optimized antenna prototype achieves gain of more
than 6.5 dBic, axial ratio of less than 3.0 dB, and return loss of less than −15 dB
over the UHF band of 820–980 MHz (17.7%). Parametric studies are carried out
to demonstrate the effects of antenna geometry parameters on the performance.
The proposed antenna can be a good candidate for UHF RFID applications.
