Title :
A wideband compact parallel-strip 180/spl deg/ Wilkinson power divider for push-pull circuitries
Author :
Chiu, L. ; Yum, T.Y. ; Xue, Q. ; Chan, C.H.
Author_Institution :
Wireless Commun. Res. Centre, City Univ. of Hong Kong, Kowloon
Abstract :
A Wilkinson power divider with a differential output implemented in parallel-strip-line (PSL) is proposed. Taking full advantages of the PSL technology and a three-stage cascaded design, more than 170% impedance and isolation bandwidths are obtained. Inherent to the PSL structure, the 180deg differential output is frequency-independent. A class-B push-pull power amplifier employing the devised concept is designed, showing a peak efficiency of 44% over a 4-GHz bandwidth. Without exploiting any extra and external low-pass filters, the proposed design can produce startling second-harmonic suppressions (more than 50dB) over the whole working dynamics and operated bandwidth
Keywords :
cascade networks; differential amplifiers; power amplifiers; power dividers; strip line circuits; wideband amplifiers; 4 GHz; 44 percent; class-B push-pull power amplifier; differential output; impedance bandwidth; isolation bandwidth; parallel strip line technology; push-pull circuits; second-harmonic suppression; three-stage cascaded design; wideband compact parallel-strip 180deg Wilkinson power divider; Bandwidth; Broadband amplifiers; Coupling circuits; Frequency; Impedance; Isolation technology; Microwave devices; Power amplifiers; Power dividers; Wideband; Harmonic suppression; parallel-strip line (PSL); push–pull amplifier; wideband Wilkinson power divider;
Journal_Title :
Microwave and Wireless Components Letters, IEEE
DOI :
10.1109/LMWC.2005.859972
