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Novel dual band patch antenna With Gap coupled composite right/left-handed transmission line

Published online by Cambridge University Press:  07 August 2018

Z. Ahmed Open the ORCID record for Z. Ahmed [Opens in a new window] ,
M. M. Ahmed ,
M. B. Ihsan ,
A. A. Chaudhary  and
J. K. Arif
Z. Ahmed*
Affiliation:
Capital University of Science and Technology, Islamabad, Pakistan
M. M. Ahmed
Affiliation:
Capital University of Science and Technology, Islamabad, Pakistan
M. B. Ihsan
Affiliation:
National University of Sciences and Technology, Islambad, Pakaistan
A. A. Chaudhary
Affiliation:
National University of Sciences and Technology, Islambad, Pakaistan
J. K. Arif
Affiliation:
National University of Sciences and Technology, Islambad, Pakaistan
*
Author for correspondence: Z. Ahmed, E-mail: [email protected]
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Abstract

A novel low profile dual band patch antenna is presented. It consists of a composite right/left-handed transmission line (CRLH TL) unit cell gap coupled with the radiating edge of a rectangular patch antenna. The dual band behavior is achieved by coupling the zeroth order resonance mode of CRLH TL and TM10 mode of the patch antenna. It is shown that frequency ratio can be changed by varying the gap between the patch and CRLH TL unit cell. The proposed configuration enables frequency reconfigurability by changing the CRLH TL unit cell using a switch. A prototype of the antenna having frequency ratio f2/f1 = 1.08 is designed and fabricated. The proposed antenna shows measured S11 ≤ −10 dB bandwidth of 100 and 50 MHz at resonance frequencies of f1 = 4.84 and f2 = 5.22 GHz, respectively. A 2 × 2 dual band CRLH TL coupled patch array is also presented, showing more than 12.7 dBi gain at both resonance frequencies.

Keywords

Composite right/left-handed transmission linedual bandfrequency reconfigurablegap couplingpatch antenna
Type
Research Papers
Information
International Journal of Microwave and Wireless Technologies , Volume 11 , Issue 1 , February 2019 , pp. 87 - 93
Copyright
Copyright © Cambridge University Press and the European Microwave Association 2018 

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