Resonant frequency tunable dual-band monopole antenna with the ground shorted inset sleeve.

The simple printed monopole antenna for dual-band operation with tunability is proposed. It uses the ground shorted inset sleeve of which the length is controlled. This type of antenna can easily produce dual-band characteristics without any additional metal strips or radiating elements. The omni-directional radiation patterns at both design frequencies are similar to those of a conventional monopole. Details of the proposed monopole design and experimental results are demonstrated in this letter. © 2010 Wiley Periodicals, Inc. Microwave Opt Technol Lett 52: 1731–1733, 2010; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.25308 [ABSTRACT FROM AUTHOR]