A capacitively loaded antenna for use in mobile handsets

Elfergani, I.T.E.; Abd-Alhameed, R.A.; See, C.H.; Child, M.B.; Excell, P.S.

Abstract

A tuneable slotted patch antenna design is presented and verified for use in the DCS, PCS and UMTS bands. The tuning circuit consists of two varactor diodes, with some passive components, and is integrated fully with the radiator patch, with the varactors occupying different locations over the slot. The tuning does not require any further modification to the patch or feed geometry. Good agreement is observed between the predicted and observed impedance bandwidth, return loss, gain and radiation pattern, throughout the range 1.70 GHz-2.05 GHz.

• Presentation Conference Type: Conference Paper (Published)
• Conference Name: 2010 Loughborough Antennas & Propagation Conference (LAPC)
• Start Date: Nov 8, 2010
• End Date: Nov 9, 2010
• Acceptance Date: Sep 20, 2010
• Online Publication Date: Dec 13, 2010
• Publication Date: 2010-11
• Deposit Date: Jun 12, 2019
• Publisher: Institute of Electrical and Electronics Engineers
• Pages: 441-444
• ISBN: 9781424473045
• DOI: https://doi.org/10.1109/lapc.2010.5666208
• Keywords: reconfigurable antennas, slot patch antennas, varactor diode
• Public URL: http://researchrepository.napier.ac.uk/Output/1871383