DocumentCode :
2864321
Title :
Four beams helical antenna array for mobile satellite application
Author :
Hassan, S.I.S. ; Ain, M.F. ; Arief, A.R.
Author_Institution :
Sch. of Electr. & Electron. Eng., Universiti Sains Malaysia, Penang, Malaysia
fYear :
2004
fDate :
5-6 Oct. 2004
Firstpage :
53
Lastpage :
55
Abstract :
This paper describes the design and fabrication of an helical array antenna that produces four beams operating at 10 GHz. The antenna consists of 16 helical antennas of axial mode arranged in 4 by 4 array on a PCB. The distance between helices is determined such that the beam is tilted at a certain angle and the 3 dB power is at its normal axis. This is done by feeding the antenna in series via a microstrip line which also acts like a phase shifter. The couplers combine all the feeding microstrip lines into a single SMA connector at each side so that we have 4 output ports. Each port produces one beam at its particular angles. By employing switching, the desired beam can be chosen. In this manner we would be able to track any signal within its coverage without mechanically moving the antenna direction. From the measurement, it is found that the designed antenna is matched to 50 ohms with VSWR less than 1.3 and gain of 10 dB. The measured radiation patterns were also in agreement with the theoretical values.
Keywords :
antenna feeds; antenna radiation patterns; beam steering; helical antennas; impedance matching; microstrip antenna arrays; mobile satellite communication; satellite antennas; PCB; SMA connector; antenna feed; antenna matching; axial mode; beam switching; four-beam helical antenna array; microstrip line; mobile satellite application; radiation patterns; Antenna arrays; Antenna feeds; Antenna measurements; Fabrication; Helical antennas; Microstrip antenna arrays; Microstrip antennas; Mobile antennas; Phase shifters; Satellite antennas;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
RF and Microwave Conference, 2004. RFM 2004. Proceedings
Print_ISBN :
0-7803-8671-X
Type :
conf
DOI :
10.1109/RFM.2004.1411073
Filename :
1411073
Link To Document :
بازگشت