Title :
Bi-directional notch and crank-shaped antenna
Author :
Mukaiyama, Tohru ; Arai, Hiroyuki ; Ebine, Yoshio
Author_Institution :
Div. of Electr. & Comput. Eng., Yokohama Nat. Univ., Japan
Abstract :
Bi-directional notch and crank-shaped antennas were proposed to extend the coverage of a relay station in the booster system inside tunnels. To extend the antenna coverage area, we present the crank-shaped antenna with parasitic elements. The crank-shaped antenna with parasitic elements suppresses the cross polarization by 17.6 dB compared with the notch antenna with parasitic elements without changing the principal polarization pattern
Keywords :
antenna radiation patterns; antenna theory; current distribution; electromagnetic wave polarisation; method of moments; microwave antennas; monopole antennas; antenna coverage area extension; bi-directional notch antennas; booster system; crank-shaped antennas; cross polarization supression; parasitic elements; polarization pattern; relay station coverage; tunnels; Antenna radiation patterns; Antennas and propagation; Bidirectional control; Computer networks; Current distribution; Mobile antennas; Mobile communication; Polarization; Probes; Relays;
Conference_Titel :
Microwave Conference Proceedings, 1997. APMC '97, 1997 Asia-Pacific
Print_ISBN :
962-442-117-X
DOI :
10.1109/APMC.1997.659412
