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Dual-band feedforward linear power amplifier using equal group delay signal canceller

Choi, Heungjae, Jeong, Yongchae and Kenney, J. Stevenson 2007. Dual-band feedforward linear power amplifier using equal group delay signal canceller. Presented at: 2007 Asia Pacific Microwave Conference, Bangkok, Thailand, 11-14 Dec 2007. 2007 Asia Pacific Microwave Conference. Picastaway, NJ: IEEE, pp. 1-4. 10.1109/APMC.2007.4555143

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Abstract

In this paper, the design of a novel dual-band feedforward linear power amplifier (FFW LPA) is presented. The frequencies of operation of the implemented dual-band FFW LPA are the digital cellular (f0=880 MHz) band, and the IMT- 2000 (f0=2.14 GHz) band, which are separated about 1.26 GHz. Using high power amplifiers (120 W PEP) for commercial base- station application, the IMD cancellation loop shows 20.45 dB and 25.04 dB suppression for the cellular and IMT-2000 bands, respectively, over a correction bandwidth of 100 MHz. From the adjacent channel leakage ratio (ACLR) measurement with CDMA IS-95A 4FA and WCDMA 4FA signal, we obtained 16.5 dB improvement at the average output power of 41.5 dBm for digital cellular band, and 18.6 dB improvement at the average output power of 40 dBm for IMT-2000 band under simultaneous operation.

Item Type: Conference or Workshop Item (Paper)
Date Type: Publication
Status: Published
Schools: Engineering
Subjects: T Technology > TA Engineering (General). Civil engineering (General)
Publisher: IEEE
ISBN: 9781424407484
Last Modified: 04 Jun 2017 07:52
URI: http://orca.cf.ac.uk/id/eprint/69005

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