Second harmonic zone injection for amplifier linearisation

T Nesimoglu, RJ Wilkinson, CN Canagarajah, JP McGeehan

Research output: Chapter in Book/Report/Conference proceedingConference Contribution (Conference Proceeding)

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Second harmonic zone (SHZ) injection is a feedback technique for reducing the intermodulation distortion (IMD) at the output of an amplifier, which is based on feeding the SHZ intermodulation products (IMP), back to the amplifier's input. The technique is analyzed theoretically and practical results demonstrate the linearisation performance. Two feedback prototypes were built, one using a frequency doubler and the other using a buffer amplifier as a distorter, where 14 dB and 13 dB improvement was obtained respectively in reducing the third order IMP (IMP3). The performance of the technique with changing frequency and input power level was also investigated.
Translated title of the contributionSecond Harmonic Zone Injection for amplifier linearisation
Original languageEnglish
Title of host publicationProc. IEE Vehicular Technology Conference (VTC), Texas
PublisherInstitute of Electrical and Electronics Engineers (IEEE)
Pages2353 - 2357
ISBN (Print)0780355652
Publication statusPublished - May 1999
Event49th Vehicular Technology Conference 1999 (VTC 1999-Spring) - Houston, United States
Duration: 1 May 1999 → …


Conference49th Vehicular Technology Conference 1999 (VTC 1999-Spring)
CountryUnited States
Period1/05/99 → …

Bibliographical note

Rose publication type: Conference contribution

Sponsorship: The authors would like to thank Lucent Technologies for their financial snpport.

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  • Second Harmonic None (SHZ)
  • feedback amplifiers
  • land mobile radio
  • linearisation techniques

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