Design of a dual‐polarised wideband short backfire antenna with high gain. Issue 9 (1st June 2013)

• Record Type: Journal Article
• Authors: Juan, Lei; Guang, Fu; Lin, Yang
• Is Part Of: IET microwaves, antennas & propagation. Volume 7:Issue 9(2013)
• Page Start: 735
• Page End: 740
• Publication Date: 2013-06-01
• Subjects: antenna radiation patterns -- aperture antennas -- broadband antennas -- electromagnetic wave polarisation -- microwave antennas -- reflector antennas -- satellite antennas -- transducers -- waveguides; dual‐polarised wideband short backfire antenna -- mobile satellite communications -- mobile satellite tracking -- telemetry -- wireless local‐area network applications -- dual‐polarised wideband SBA -- waveguide -- ortho‐mode transducer -- antenna bandwidth widening -- second resonance point -- parasitic reflector -- conical subreflector -- aperture radiation efficiency -- primary reshaping -- antenna design -- L‐band -- voltage standing wave ratio -- radiation efficiency -- compact construction -- simple construction -- mechanical characteristics -- electrical characteristics -- satellite communication application -- practical engineering design; Microwaves -- Periodicals; Microwave antennas -- Periodicals; Antennas (Electronics) -- Periodicals; Radio wave propagation -- Periodicals; Microwave communication systems -- Periodicals; 621.381305
• DOI: 10.1049/iet-map.2012.0513
• Languages: English
• ISSNs: 1751-8725

Abstract

Abstract : The short backfire antenna (SBA) has been widely used for mobile satellite communications, tracking, telemetry and wireless local‐area network applications. A dual‐polarised wideband SBA excited by a hybrid configuration of waveguide and ortho‐mode transducer is described here. The bandwidth widening of the antenna is achieved by the appearance of the second resonance point, owing to the parasitic reflector suspended on the conical sub‐reflector. The aperture radiation efficiency is improved according to the reshaping of primary and sub‐reflector, as well as the choke device added to the primary reflector. The antenna is designed to operate within the L‐band. It has a frequency bandwidth for voltage standing wave ratio ≤ 1.5 of about 8% and a maximum gain of 20 dB. Within the antenna bandwidth, the gain and the radiation efficiency have values more than 19.5 dB and 76%, respectively. The designed antenna has a simple and compact construction and high mechanical and electrical characteristics; hence, it is appropriate for the satellite communication application. The operating mechanism is investigated to explain why the SBA can obtain good impedance and radiation characteristics. A parametric study is conducted for the use of practical engineering design.