Novel Feed Network for Circular Polarization Antenna Diversity

In this letter, we propose a novel feed network for circular polarization (CP) diversity antennas to enhance communications performances. The previous CP diversity systems adopted dual polarization diversity using right-hand circular polarization (RHCP) and left-hand circular polarization (LHCP) wit...

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Bibliographic Details
Published in:IEEE antennas and wireless propagation letters 2014, Vol.13, p.979-982
Main Authors: Han, Jung-Hoon, Myung, Noh-Hoon
Format: Article
Language:English
Subjects:
Antenna feeds
Antenna measurements
Circular polarization
diversity
Diversity reception
feed network
multiple-input-multiple-output (MIMO)
Polarization
Ports (Computers)
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Summary:In this letter, we propose a novel feed network for circular polarization (CP) diversity antennas to enhance communications performances. The previous CP diversity systems adopted dual polarization diversity using right-hand circular polarization (RHCP) and left-hand circular polarization (LHCP) within a small space. However, the same rotational CPs need further antenna distance. To overcome the space limitation for the same CP diversity antenna, we propose a feed network for CP antenna using conventional CP with orthogonal polarization radiation characteristics of a linear polarization (LP) diversity system without additional antennas. The port isolation characteristics and impedance matching conditions are numerically verified for the diversity system and antenna characteristics. The proposed feed network with CP patch antennas is fabricated and measured in a reverberation chamber for diversity performances, and their validity is verified.
ISSN:1536-1225
1548-5757
DOI:10.1109/LAWP.2014.2323399