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Title: A wideband circularly polarized stacked slotted microstrip patch antenna
Authors: Nasimuddin, N.
Qing, X.
Chen, Z.N. 
Keywords: Circular polarization
microstrip antenna
slotted microstrip patch
stacked microstrip antenna
Issue Date: 2013
Citation: Nasimuddin, N., Qing, X., Chen, Z.N. (2013). A wideband circularly polarized stacked slotted microstrip patch antenna. IEEE Antennas and Propagation Magazine 55 (6) : 84-99. ScholarBank@NUS Repository.
Abstract: A wideband, single-feed, circularly polarized, stacked, square, slotted microstrip patch antenna is proposed for radio-frequency-identification-reader applications. The proposed antenna consists of an upper square asymmetric slotted patch, stacked over a lower square asymmetric slotted radiating patch and a microstrip stub, along with a coaxial feed. The wideband circularly polarized radiation of the antenna is achieved using a microstrip stub in the lower patch and a stacked slotted square patch. The proposed antenna is designed using a combination of low-cost FR4 substrate and foam. The measured 10 dB return-loss bandwidth of the antenna was around 21% (833 MHz to 1033 MHz), and the 3 dB axial-ratio bandwidth of the antenna was around 13.4% (835 MHz to 955 MHz). The gain was around 7.0 dBic over the 3 dB axial-ratio bandwidth. The overall antenna volume was 0.601¿0 × 0.601¿0 × 0.895¿0 (where ¿0 is the free-space wavelength at 900 MHz). © 2013 IEEE.
Source Title: IEEE Antennas and Propagation Magazine
ISSN: 10459243
DOI: 10.1109/MAP.2013.6781708
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