A Compact Printed Triangular Monopole Antenna for Ultrawideband Applications

In this article, a printed triangular-shaped monopole antenna is proposed for emerging ultrawideband application. The proposed antenna uses a triangular radiating patch which is directly fed by a 50-X microstrip feed line. To improve the impedance bandwidth, a round-corner ground plane has been used. To further improve the impedance bandwidth for the entire band, a microstrip transition (near the antenna front end) has been introduced between the microstrip feed line and the triangular radiator that provides a wide impedance bandwidth from 1.8 to 15.0 GHz for jS11j 210 dB. The proposed antenna has been realized using the FR-4 printed circuit board substrate and occupies a small size of about 24 3 30 3 1.6 mm compared to conventional antenna structures. The proposed antenna has nearly omnidirectional radiation pattern and moderate gain throughout the operating frequency region. VC 2014 Wiley Periodicals, Inc. Microwave Opt Technol Lett 56:1155–1159, 2014; View this article online at wileyonlinelibrary.com. DOI 10.1002/mop.28290