A mismatch detector for adaptive antenna impedance matching

F. Meng, A. Bezooijen, van, R. Mahmoudi

Onderzoeksoutput: Hoofdstuk in Boek/Rapport/CongresprocedureConferentiebijdrageAcademicpeer review

21 Citaten (Scopus)


The efficiency of a mobile phone's power amplifier suffers from the antenna impedance mismatch caused by the body-effect of its user. A mismatch detector used for an innovative antenna matching algorithm which is based on adaptive correction of the reactive part of the antenna impedance mismatch has been designed, implemented and measured. The mismatch detector which consists of a wideband 90deg phase shifter, a limiter and a Gilbert-cell multiplier detects the phase of the reflection coefficient. The dynamic range of the mismatch detector is up to 142deg at the standard GSM frequencies (900MHz, 1800MHz and 1900MHz) for input power not less than -20dBm. This mismatch detector fulfills the function of determining the mismatch property according to the presented adaptive antenna impedance matching algorithm
Originele taal-2Engels
TitelProceedings of the 36th European Microwave Conference 2006, 10-15 September 2006, Manchester, United Kingdom
Plaats van productiePicataway
UitgeverijInstitute of Electrical and Electronics Engineers
ISBN van geprinte versie2-9600551-6-0
StatusGepubliceerd - 2006
Evenement36th European Microwave Conference (EuMC 2006) - Manchester, Verenigd Koninkrijk
Duur: 10 sep 200615 sep 2006
Congresnummer: 36


Congres36th European Microwave Conference (EuMC 2006)
Verkorte titelEuMC 2006
Land/RegioVerenigd Koninkrijk
AnderIEEE 36th European Microwave Conference


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