Title :
Circularly Polarized Shorted Patch Antenna on High Permittivity Substrate With Wideband
Author :
Xihui Tang ; Wong, Hang ; Yunliang Long ; Quan Xue ; Lau, K.L.
Author_Institution :
Dept. of Electron. & Commun. Eng., Sun Yat-Sen Univ., Guangzhou, China
fDate :
3/1/2012 12:00:00 AM
Abstract :
A wideband coaxial feed shorted patch antenna for circular polarization on high permittivity substrate is designed, fabricated and measured. This antenna is implemented by dividing the slotted patch into two parts (excited shorted part and coupled part) at the center. With adding different arms at the diagonal corners, each part can generate a proper circularly polarized (CP) resonance such that a wideband axial ratio (AR) bandwidth is obtained. Measured results show that the proposed antenna has an axial ratio bandwidth (AR ≤ 3 dB) of 3.7% (2.563-2.660 GHz), an impedance bandwidth (reflection coefficient, S11 ≤ -10 dB) of 6.9% (2.49-2.67 GHz) and a peak gain of 4 dBic.
Keywords :
antenna feeds; broadband antennas; electromagnetic wave polarisation; microstrip antennas; permittivity; slot antennas; CP resonance; antenna design; antenna fabrication; antenna measurement; bandwidth 2.49 GHz to 2.67 GHz; circularly-polarized-shorted patch antenna; impedance bandwidth; permittivity substrate; reflection coefficient; slotted patch; wideband AR bandwidth; wideband axial ratio bandwidth; wideband coaxial feed; Antenna measurements; Bandwidth; Microstrip antennas; Patch antennas; Permittivity; Substrates; Circular polarization; high permittivity substrate; patch antenna; shorted; wideband;
Journal_Title :
Antennas and Propagation, IEEE Transactions on
DOI :
10.1109/TAP.2011.2180307
