Summary
International Symposium on Antennas and Propagation
2009
Session Number:1C2
Session:
Number:1C2-1
A phased array of switched-beam elements for angle-of-arrival measurement
Jukkrit Tagapanij, Monai Krairiksh,
pp.117-120
Publication Date:2009/10/21
Online ISSN:2188-5079
Summary:
Angle-of-arrival (AoA) is important in identifying the direction of radio signal to the receiving system in modern wireless communications. It enables the optimization of an adaptive antenna, locate and track the target, etc. [1]-[2]. The conventional AoA schemes are MUSIC [3] and ESPRIT [4] which are based on digital signal processing. Recently, Kamarudin et al. [5] proposed the use of switchedbeam antennas to measure AoA. It accomplished the satisfactory results at the expense of less accuracy comparing with MUSIC and ESPRIT. It is suitable for a mobile unit which computation intensive is avoided. In such system, four beams were used and it is anticipated that the accuracy can be improved by using more number of antenna beams. Nevertheless, to obtain more number of antenna beams the more sophisticated feeding system and number of array elements must be increased. Ngamjanyaporn et al. [6] proposed the so called phased array of switched-beam elements (PASE) that provided a number of beams using only four array elements with four one-bit phase shifters. Therefore, it is a potential receiving antenna for a mobile unit. This paper proposes PASE for AoA measurement in a mobile unit.