Title :
Novel Feed Network for Circular Polarization Antenna Diversity
Author :
Jung-Hoon Han ; Noh-Hoon Myung
Author_Institution :
Dept. of Electr. Eng., Korea Adv. Inst. of Sci. & Technol., Daejeon, South Korea
Abstract :
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.
Keywords :
antenna feeds; diversity reception; electromagnetic metamaterials; electromagnetic wave polarisation; impedance matching; microstrip antennas; reverberation chambers; LHCP; RHCP; antenna distance; circular polarization antenna diversity; dual polarization diversity; feed network; impedance matching; left-hand circular polarization; linear polarization diversity system; orthogonal polarization radiation; patch antennas; port isolation characteristics; reverberation chamber; right-hand circular polarization; Antenna feeds; Antenna measurements; Diversity reception; Polarization; Ports (Computers); Circular polarization; diversity; feed network; multiple-input–multiple-output (MIMO);
Journal_Title :
Antennas and Wireless Propagation Letters, IEEE
DOI :
10.1109/LAWP.2014.2323399
