Title :
A notch-wire composite antenna for polarization diversity reception
Author :
Kuga, Nobuhiro ; Arai, Hiroyuki ; Goto, Naohisa
Author_Institution :
Div. of Optoelectron. Syst. Lab., Hitachi Cable Ltd, Hirachi, Japan
fDate :
6/1/1998 12:00:00 AM
Abstract :
This paper presents a notch-wire composite antenna for polarization diversity reception in an indoor base-station system. A three-notched disk antenna and a wire antenna are proposed as component antennas for the horizontal and the vertical polarization, respectively. These component antennas are unified as a single composite diversity antenna by mounting the wire antenna on the notched disk. Antenna characteristics are calculated using the method of moments (MoM), with wire grid models and examined in terms of component arrangement, and terminal isolation. It is found that maximum isolation is obtained when the current path of the wire antenna is where the current exciting the H-pol element is cancelled. Consequently, both component antennas may work independently even in the composite form. The quasi-monopole pattern is also confirmed for each polarization
Keywords :
antenna radiation patterns; diversity reception; electromagnetic wave polarisation; indoor radio; land mobile radio; loop antennas; method of moments; wire antennas; H-pol element; component arrangement; composite diversity antenna; current path; horizontal polarization; indoor base-station system; method of moments; notch-wire composite antenna; polarization diversity reception; quasi-monopole pattern; terminal isolation; three-notched disk antenna; vertical polarization; wire antenna; wire grid models; Antenna accessories; Antenna feeds; Associate members; Diversity reception; Loaded antennas; Moment methods; Polarization; Rayleigh channels; Wire; Wireless networks;
Journal_Title :
Antennas and Propagation, IEEE Transactions on
