TY - JOUR
T1 - A wide-band circularly polarized L-probe coupled patch antenna for dual-band operation
AU - Lau, Ka-Leung
AU - Luk, Kwai-Man
PY - 2005/8
Y1 - 2005/8
N2 - This paper presents the design and testing of a dual-band circularly polarized patch antenna. The portion of the antenna for upper band operation consists of two stacked circular patches which are supported by the plastic posts in the air. The patches are excited by four L-probes which are located sequentially under the circumference of the lower patch. The distance between the upper patch and the ground plane is about 0.1 free space wavelength at 2.492 GHz. This upper band portion possesses an impedance bandwidth of 54.9% (SWR ≤ 2) anda 3-dB axial ratio bandwidth of 47.7%. The antenna peak gain is 8 dBi. For dual-band operation, a larger circular patch for lower band operation is added below the upper band patches. The lower band patch is also coupled by four L-probes sequentially. The integrated antenna has an impedance bandwidth of 43.9% (SWR ≤ 2) and a 3-dB axial ratio bandwidth of 33% for the lower band, while an impedance bandwidth of 55.2% (SWR ≤ 2) anda 3-dB axial ratio bandwidth of 44.7% can be obtained for the upper band. Both bands have a peak gain of around 7.8 dBi. © 2005 IEEE.
AB - This paper presents the design and testing of a dual-band circularly polarized patch antenna. The portion of the antenna for upper band operation consists of two stacked circular patches which are supported by the plastic posts in the air. The patches are excited by four L-probes which are located sequentially under the circumference of the lower patch. The distance between the upper patch and the ground plane is about 0.1 free space wavelength at 2.492 GHz. This upper band portion possesses an impedance bandwidth of 54.9% (SWR ≤ 2) anda 3-dB axial ratio bandwidth of 47.7%. The antenna peak gain is 8 dBi. For dual-band operation, a larger circular patch for lower band operation is added below the upper band patches. The lower band patch is also coupled by four L-probes sequentially. The integrated antenna has an impedance bandwidth of 43.9% (SWR ≤ 2) and a 3-dB axial ratio bandwidth of 33% for the lower band, while an impedance bandwidth of 55.2% (SWR ≤ 2) anda 3-dB axial ratio bandwidth of 44.7% can be obtained for the upper band. Both bands have a peak gain of around 7.8 dBi. © 2005 IEEE.
KW - Broadband operation
KW - Circular polarization
KW - Patch antenna
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U2 - 10.1109/TAP.2005.851818
DO - 10.1109/TAP.2005.851818
M3 - RGC 21 - Publication in refereed journal
SN - 0018-926X
VL - 53
SP - 2636
EP - 2644
JO - IEEE Transactions on Antennas and Propagation
JF - IEEE Transactions on Antennas and Propagation
IS - 8 II
ER -