TY - JOUR
T1 - Dual CP Polarization Diversity and Space Diversity Antennas Enabled by a Compact T-Shaped Feed Structure
AU - Geng, Junping
AU - Ziolkowski, Richard W.
AU - Wang, Kun
AU - Zhao, Xiaonlan
AU - Zhou, Han
AU - Chenhu, Guanshen
AU - Liang, Xianling
AU - Jin, Ronghong
N1 - Funding Information:
This work was supported in part by the National Natural Science Foundation under Grant 61571289, Grant 61571298, and Grant 61701303, in part by the Natural Science Foundation of Shanghai under Grant 17ZR1414300, and in part by the Shanghai Pujiang Program under Grant 17PJ1404100.
Publisher Copyright:
© 2013 IEEE.
PY - 2019
Y1 - 2019
N2 - A compact T-shaped feed structure (TFS) is reported that enables the realization of two types of diversity antennas: a polarization diversity antenna (PDA) and a spatial diversity antenna (SDA). Both systems have a high potential for mobile wireless communication applications. The TFS includes four ports and two independent coaxial channels with effective isolation between them all. The PDA is a dual CP omnidirectional antenna. Its optimized prototype achieves measured impedance bandwidths of 16.4% and 15.28% in its LHCP and RHCP states, respectively, and realized gains in both between 4.8 and 6.46 dBic. The inner thin coaxial cable (ITCC) of the TFS directly drives its LHCP subsystem, facilitating its improved omnidirectional performance. This ITCC is also used to directly feed the SDA's low-profile directional planar equiangular spiral antenna and its side port drives its omnidirectional RHCP antenna. Good hemispherical coverage is realized with a measured common impedance bandwidth larger than 14.35% with more than 40-dB isolation between its two ports. The corresponding measured realized gain of the SDA is between 4 and 7.8 dBic. The measured results for both optimized prototypes confirm their simulated performance characteristics.
AB - A compact T-shaped feed structure (TFS) is reported that enables the realization of two types of diversity antennas: a polarization diversity antenna (PDA) and a spatial diversity antenna (SDA). Both systems have a high potential for mobile wireless communication applications. The TFS includes four ports and two independent coaxial channels with effective isolation between them all. The PDA is a dual CP omnidirectional antenna. Its optimized prototype achieves measured impedance bandwidths of 16.4% and 15.28% in its LHCP and RHCP states, respectively, and realized gains in both between 4.8 and 6.46 dBic. The inner thin coaxial cable (ITCC) of the TFS directly drives its LHCP subsystem, facilitating its improved omnidirectional performance. This ITCC is also used to directly feed the SDA's low-profile directional planar equiangular spiral antenna and its side port drives its omnidirectional RHCP antenna. Good hemispherical coverage is realized with a measured common impedance bandwidth larger than 14.35% with more than 40-dB isolation between its two ports. The corresponding measured realized gain of the SDA is between 4 and 7.8 dBic. The measured results for both optimized prototypes confirm their simulated performance characteristics.
KW - Dual CP omnidirectional antenna (DCPOA)
KW - T-shaped feed structure (TFS)
KW - internal thin coaxial cable (ITCC)
KW - omnidirectional CP slot array antenna (OCPSA)
KW - polarization diversity antenna (PDA)
KW - spatial diversity antenna (SDA)
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U2 - 10.1109/ACCESS.2019.2925396
DO - 10.1109/ACCESS.2019.2925396
M3 - Article
AN - SCOPUS:85070303899
SN - 2169-3536
VL - 7
SP - 96284
EP - 96296
JO - IEEE Access
JF - IEEE Access
M1 - 8747352
ER -