Frequency Reconfiguration of a Dual-Band Phased Array Antenna With Variable-Impedance Matching

In this article, a dual-band phased-array antenna element is presented. The proposed element is particularly designed to possess frequency tuning capabilities by variable-impedance matching. It is demonstrated that the operational frequency band of the antenna shifts from L- to S-band (about 2.5:1 f...

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Bibliographic Details
Published inIEEE transactions on antennas and propagation Vol. 63; no. 8; pp. 3477 - 3485
Main Authors Haider, Nadia, Caratelli, Diego, Yarovoy, Alexander G.
Format Journal Article
LanguageEnglish
Published IEEE 01.08.2015
Subjects
Antenna measurements
frequency agility
Impedance
Impedance matching
Microstrip antennas
reconfigurable antenna
Reflection coefficient
Transmission line antennas
variable impedance
variable impedance
reconfigurable antenna
Frequency agility
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Summary:In this article, a dual-band phased-array antenna element is presented. The proposed element is particularly designed to possess frequency tuning capabilities by variable-impedance matching. It is demonstrated that the operational frequency band of the antenna shifts from L- to S-band (about 2.5:1 frequency ratio) with in-band frequency tuning of about 25%. The compact size and the wide-angle scanning properties, make the antenna element suitable for phased-array application. Other advantages of variable-impedance matching for phased-array systems, such as sustain wider scan angles and minimize unwanted signal interferences, coming from spurious directions, are also discussed.
ISSN:0018-926X
1558-2221
DOI:10.1109/TAP.2015.2441120