An Integrated Wideband Power Amplifier for Cognitive Radio

Author

Chen, Yi-Jan Emery ; Yang, Li-Yuan ; Yeh, Wei-Chih

Author_Institution

Nat. Taiwan Univ., Taipei

Volume

55

Issue

10

fYear

2007

Firstpage

2053

Lastpage

2058

Abstract

This paper presents the development of the wideband power amplifier (PA) for application to intelligent cognitive radios. The load-tracking based on the frequency-varied load-pull technique is proposed for the PA design. The load impedance tracking is realized by filter network synthesis. A 3-7.5-GHz broadband PA is demonstrated in 0.15-mum InGaAs pseudomorphic HEMT technology. Operated at 3.5 V, the P₁ _dB and power-added efficiency of the PA are better than 21.4 dBm and 20%, respectively.

Keywords

cognitive radio; network synthesis; power HEMT; power amplifiers; wideband amplifiers; cognitive radio; filter network synthesis; frequency 3 GHz to 7.5 GHz; frequency-varied load-pull technique; integrated wideband power amplifier; load impedance tracking; pseudomorphic HEMT; size 0.15 mum; Broadband amplifiers; Cognitive radio; Filters; Frequency; Impedance; Indium gallium arsenide; Network synthesis; PHEMTs; Power amplifiers; Radiofrequency amplifiers; Cognitive radio (CR); frequency agile; load-tracking; power amplifier (PA); pseudomorphic HEMT (pHEMT); software-defined radio (SDR); wideband;

fLanguage

English

Journal_Title

Microwave Theory and Techniques, IEEE Transactions on

Publisher

ieee

ISSN

0018-9480

Type

jour

DOI

10.1109/TMTT.2007.906497

Filename

4339637