WIDEBAND QUASI-YAGI ANTENNA FED BY MICROSTRIP-TO-SLOTLINE TRANSITION

초록

This letter presents a wideband quasi-Yagi antenna fed by a microstrip-to-slotline transition. The transition consists of a microstrip radial stub and slot radial stub, both at 90 degrees but with different radii, to achieve wideband impedance matching. The antenna has a measured fractional bandwidth of approximately 46% (4.64-7.42 GHz) for a - 10 dB reflection coefficient and a flat gain of 6.0-6.75 dBi with a front-to-back ratio and cross-polarization level better than 17 and -15 dB, respectively, across the bandwidth. (C) 2011 Wiley Periodicals, Inc. Microwave Opt Technol Lett 54:150-153, 2012; View this article online at wileyonlinelibrary.com. DOI 10.1002/mop.26504

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