Printed pentagon monopole antenna with a band-notched function

Abstract

In this study, we propose a design to obtain band-notching characteristics in printed planar monopoles. An ultra-wide band was achieved by means of the beveled upper edge of the rectangular patch with dimension as small as 55 mm2. On the other hand, it is necessary to notch certain bands to avoid interference from existing wireless local area network (WLAN), such as the 5.2 GHz band (5150–5350 MHz) and 5.8 GHz band (5725–5875 MHz), in spite of the adoption of the FCC for UWB communication systems operating between 3.1 and 10.6 GHz. This feature can be easily achieved by embedding an inverted-V-shape slot with length about one-half of the guided wavelength of the expected notched frequencies and along the boundary of the beveled radiating patch. This article presents the design of the proposed slotted monopole antenna, demonstrates the UWB operation with a notched frequency band, and analyzes the effects of the dimensions of the inverted-V-shape slot on the notched frequency band. © 2006 Wiley Periodicals, Inc. Microwave Opt Technol Lett 48: 2016–2018, 2006; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.21859