Printed Frequency Beam-Scanning Antenna With Flat Gain and Low Sidelobe Levels

Author

Cui, Lan ; Wu, Wenchuan ; Fang, Da-Gang

Author_Institution

Ministerial Key Laboratory of JGMT, Nanjing University of Science and Technology, Nanjing, China

Volume

12

fYear

2013

fDate

2013

Firstpage

292

Lastpage

295

Abstract

A frequency beam-scanning antenna with backfire-to-endfire beam-steering capability is proposed and investigated. This antenna is with printed planar structure that consists of a low-loss slow-wave printed meander line based on the even-mode bilateral broadside-coupled suspended microstrip line (BSML). The propagation properties of the meander-line unit and its principles for frequency-scanning applications are studied extensively. This printed antenna achieves the measured beam scanning of ${-}$ 27.5 $^{\\circ}$ to 46 $^{\\circ}$ with the frequency sensitivity of 43.24 $^{\\circ}$ /GHz and a maximum gain of 15.5 dBi. The antenna exhibits flat gain of more than 13 dBi in the whole frequency range from 8.9 to 10.6 GHz. The sidelobe levels are near 20 dB. The design flexibility of this kind of antenna is shown.

Keywords

Arrays; Frequency measurement; Gain; Microstrip; Microstrip antennas; Substrates; Broadside-coupled suspended microstrip line (BSML); frequency-scanning antenna; printed planar structure; slow-wave meander line;

fLanguage

English

Journal_Title

Antennas and Wireless Propagation Letters, IEEE

Publisher

ieee

ISSN

1536-1225

Type

jour

DOI

10.1109/LAWP.2013.2248696

Filename

6469158