TY - JOUR
T1 - A circularly polarized pattern diversity antenna for hemispherical coverage
AU - Deng, Changjiang
AU - Li, Yue
AU - Zhang, Zhijun
AU - Feng, Zhenghe
N1 - Publisher Copyright:
© 2014 IEEE.
PY - 2014/10/1
Y1 - 2014/10/1
N2 - In this communication, a circularly polarized (CP) antenna is proposed for satellite communication applications. The proposed antenna consists of two parts. One part is in-phase-fed folded monopoles with omnidirectional CP radiation pattern, and the other part is sequential-fed L-shaped monopoles with broadside CP radiation pattern. By combining the two parts as a pattern diversity antenna, upper hemispherical coverage with left-handed circular polarization (LHCP) is achieved in a small volume of 0.38λ x 0.38λ x 0.071λ (λ is the free-space wavelength). A prototype of the proposed antenna operating at 1.575 GHz has been built and tested. The measured overlapping bandwidth for both the two patterns with -10-dB impedance bandwidth and 3-dB axial-ratio (AR) is 6.7% (1.515-1.62 GHz), also with high port isolation. In addition, the AR and gain coverage over the upper hemisphere is discussed in detail.
AB - In this communication, a circularly polarized (CP) antenna is proposed for satellite communication applications. The proposed antenna consists of two parts. One part is in-phase-fed folded monopoles with omnidirectional CP radiation pattern, and the other part is sequential-fed L-shaped monopoles with broadside CP radiation pattern. By combining the two parts as a pattern diversity antenna, upper hemispherical coverage with left-handed circular polarization (LHCP) is achieved in a small volume of 0.38λ x 0.38λ x 0.071λ (λ is the free-space wavelength). A prototype of the proposed antenna operating at 1.575 GHz has been built and tested. The measured overlapping bandwidth for both the two patterns with -10-dB impedance bandwidth and 3-dB axial-ratio (AR) is 6.7% (1.515-1.62 GHz), also with high port isolation. In addition, the AR and gain coverage over the upper hemisphere is discussed in detail.
KW - Circular polarization
KW - Hemispherical coverage
KW - Pattern diversity antenna
KW - Satellite communications
UR - http://www.scopus.com/inward/record.url?scp=84907992414&partnerID=8YFLogxK
U2 - 10.1109/TAP.2014.2342763
DO - 10.1109/TAP.2014.2342763
M3 - Article
AN - SCOPUS:84907992414
SN - 0018-926X
VL - 62
SP - 5365
EP - 5369
JO - IEEE Transactions on Antennas and Propagation
JF - IEEE Transactions on Antennas and Propagation
IS - 10
M1 - 2342763
ER -