DocumentCode :
470707
Title :
Orthogonally-Arranged Center-Feed Single-Layer Slotted Waveguide Array Antennas for Polarization Division Duplex
Author :
Tsunemitsu, Y. ; Kojima, Keisuke ; Yoshida, Gaku ; Nagayasu, M. ; Naohisa, G. ; Hirokawa, Jiro ; Ando, Makoto
Author_Institution :
Japan Radio Co., Ltd., Tokyo
fYear :
2007
fDate :
11-16 Nov. 2007
Firstpage :
1
Lastpage :
5
Abstract :
Fixed wireless access (FWA) systems in the 26 GHz band have been commercialized in Japan for high-speed Internet connections between subscribers and base stations. Compact and low-cost user terminals are realized by adopting alternating-phase fed, single-layer waveguide slot arrays. This unique antenna consists of two parts: a slot plate and a base plate with corrugations. The two plates are screwed to each other, which dispenses with electrical contact in the strict sense. To double the frequency efficiency, we propose a system that utilizes orthogonal polarization. This system is called Polarization Division Duplex (PDD). The challenge is for full frequency reuses based upon high isolation between the Tx and Rx antennas, which is inherent to planar slotted waveguide arrays. Orthogonal arrangement of two arrays has almost 70 to 80 dB of inherent isolation. The communication test uses QPSK modulation and with a 20 MHz bandwidth in the 26 GHz band. For measurements, the two wireless station´s distance is almost 300 m. The results of the field test show same time transmission available using same frequency band.
Keywords :
antenna feeds; electromagnetic wave polarisation; quadrature phase shift keying; radio access networks; receiving antennas; slot antenna arrays; transmitting antennas; Japan; QPSK modulation; Rx antennas; Tx antennas; bandwidth 20 MHz; distance 300 m; fixed wireless access systems; frequency 26 GHz; frequency reuses; high-speed Internet connections; orthogonal polarization; orthogonally-arranged center-feed antennas; planar slotted waveguide arrays; polarization division duplex; single-layer slotted waveguide array antennas; slot arrays; time transmission; Fixed Wireless Access; Polarization Division Duplex; center-feed; single-layer waveguide slot array antenna;
fLanguage :
English
Publisher :
iet
Conference_Titel :
Antennas and Propagation, 2007. EuCAP 2007. The Second European Conference on
Conference_Location :
Edinburgh
Print_ISBN :
978-0-86341-842-6
Type :
conf
Filename :
4458389
Link To Document :
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