A high linearity and efficiency UHF RF power amplifier with Cartesian feedback for digital modulation

M. F. Ain, Mandeep Singh Jit Singh, S. I S Hassan, K. Narendra

Research output: Contribution to journalArticle

Abstract

An adaptive bias technique is proposed to meet the high linearity requirements of the high linearity requirements of the degree digital modulation standard. The adaptive bias technique is investigated to improve both linearity and amplifier. The optimal device loading impedances and the design of the matching networks and studied for bandwidth applications. This technique allows the change of the quiescent current of a device with respect to the input power level. This means that a low quiescent current at low output power level and an increasing quiescent current at high output power can be achieved. This technique simultaneously provides both the linearity and efficiency characteristics over a broad range of power levels. Similar technique can can be employed for each stage of the amplifier, for multistage amplifiers. The inherent bandwidth (BW) is the bandwidth obtained under conjugate matching conditions, where the matching loads terminate the two-port device.

Original languageEnglish
Pages (from-to)120-126
Number of pages7
JournalMicrowave Journal
Volume51
Issue number3
Publication statusPublished - Mar 2008
Externally publishedYes

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Power amplifiers
Modulation
Feedback
Bandwidth

ASJC Scopus subject areas

  • Electrical and Electronic Engineering
  • Computer Networks and Communications

Cite this

A high linearity and efficiency UHF RF power amplifier with Cartesian feedback for digital modulation. / Ain, M. F.; Jit Singh, Mandeep Singh; Hassan, S. I S; Narendra, K.

In: Microwave Journal, Vol. 51, No. 3, 03.2008, p. 120-126.

Research output: Contribution to journalArticle

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