Document Type

Conference Paper

Rights

This item is available under a Creative Commons License for non-commercial use only

Publication Details

In IEEE Antennas and Propagation Society International Symposium,San Diego, California, 5-11 July, 2008, pp.1-4. ISBN: 978-1-4244-2041-4 Digital Object Identifier: 10.1109/APS.2008.4619876 Available from Antennas and Propagation Society International Symposium, 2008. AP-S 2008. IEEE Publication Date: 5-11 July 2008 On page(s): 1 - 4 Number of Pages: 1 - 4 Location: San Diego, CA ISBN: 978-1-4244-2041-4 INSPEC Accession Number:10204512 Digital Object Identifier: 10.1109/APS.2008.4619876 http://0-ieeexplore.ieee.org.ditlib.dit.ie/stamp/stamp.jsp?tp=&arnumber=4619876&isnumber=4618896

Abstract

The effects of a Klopfenstein tapered transmission line used to feed a typical planar monopole UWB antenna have been investigated in terms of impedance bandwidth, phase linearity and radiation properties. The analysis shows that the taper allows manipulation of the resonances occurring within the operating bandwidth. A Klopfenstein tapered feedline that matches the 50 Omega input impedance to 30 Omega along 50 mm is able to reduce the maximum group delay variation by 85% with an acceptable variation of the impedance bandwidth and minor changes in the radiation pattern.