Title :
Variable beam tilt microstrip array for 5 GHz wireless access system
Author :
Hamamoto, Kozue ; ARAI, HIROWKI ; Yonezawa, Kenya ; Maeyama, Toshiyuki
Author_Institution :
Fac. of Eng., Yokohama Nat. Univ., Japan
Abstract :
This paper presents a variable beam tilt array using electromagnetically coupled patch elements. Two antenna elements are excited with the phase difference of 90° and the spacing is adjusted around quarter wavelength to change the beam tilt. The antenna element is coupled electromagnetically to the feeding stub, which is easy to move for variable beam tilt. Numerical simulation shows the beam tilt angle is adjusted from 30 to 60°. This variable beam tilt is effective in changing the coverage area of indoor base station antennas for 5 GHz wireless access systems
Keywords :
antenna radiation patterns; electromagnetic coupling; microstrip antenna arrays; multibeam antennas; radio access networks; 5 GHz; 5 GHz wireless access system; Multimedia Mobile Access Communications; antenna element excitation; beam tilt angle; coverage area; electromagnetic coupling; electromagnetically coupled patch elements; feeding stub; indoor base station antenna; multi beam antenna; numerical simulation; phase difference; quarter wavelength; radiation pattern; spacing adjustment; variable beam tilt microstrip array; Antenna radiation patterns; Beams; Directional antennas; Electromagnetic coupling; Feeds; Interference; Microstrip antenna arrays; OFDM; Optical coupling; Phased arrays;
Conference_Titel :
Microwave Conference, 2001. APMC 2001. 2001 Asia-Pacific
Conference_Location :
Taipei
Print_ISBN :
0-7803-7138-0
DOI :
10.1109/APMC.2001.985601
