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http://dx.doi.org/10.6109/jicce.2016.14.4.222

Compact Microstrip-Fed Square Loop Antenna for DTV Applications  

Yeo, Junho (School of Computer and Communication Engineering/Information and Communication Research Center, Daegu University)
Lee, Jong-Ig (Division of Mechatronics Engineering, Dongseo University)
Abstract
A design method for a compact square loop antenna fed by a microstrip (MS) line for indoor digital television (DTV) applications is proposed. The proposed antenna consists of a square loop, circular sectors, and an MS line. The square loop combined with circular sectors is printed on one side of a substrate, and a $75-{\Omega}$ MS line is printed on the other side. The circular sectors are used as a wideband balun or transition to connect the MS line and the square loop. A prototype of the proposed square loop antenna operating in the DTV band (470-806 MHz) is designed and fabricated on an FR4 substrate. Experimental results show that the proposed antenna has the desired impedance characteristics in the frequency band of 464-1,220 MHz (89.8%) for a voltage standing wave ratio (VSWR) of <2 covering the DTV band, and a broadside gain of 0.8-3.3 dBi in the DTV band.
Keywords
Circular sectors; Compact; Indoor DTV; Microstrip-fed; Square loop;
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