Title :
Improvement of broadband feedforward amplifier using photonic bandgap
Author :
Yoon, Jinho ; Seo, Chulhun
Author_Institution :
Sch. of Electron. Eng., Soongsil Univ., Seoul, South Korea
Abstract :
In this paper, the photonic bandgap, the predistortion, and the secondary harmonic tuning are simultaneously employed in a feedforward amplifier to maximize the power added efficiency (PAE) and the operating bandwidth for in IMT-2000 band. In this case, the secondary harmonic tuning and the predistortion linearizer can cancel the second and the third harmonics, respectively. The PBG prevented any more harmonics appearing over 6 GHz. The feedforward amplifier was improved by 4%, and 15 dBc in the PAE and the IMD (intermodulation distortion), respectively. The operation bandwidth achieved was twice as wide as the conventional feedforward amplifier.
Keywords :
circuit tuning; feedforward; intermodulation distortion; microwave circuits; microwave photonics; microwave power amplifiers; wideband amplifiers; IMT-2000 band; broadband feedforward amplifier; harmonic tuning; intermodulation distortion; microwave power amplifiers; operating bandwidth; photonic bandgap; power added efficiency; predistortion; predistortion linearizer; secondary harmonic tuning; Bandwidth; Broadband amplifiers; Manufacturing; Optical amplifiers; Optical filters; Periodic structures; Photonic band gap; Power amplifiers; Power harmonic filters; Predistortion;
Journal_Title :
Microwave and Wireless Components Letters, IEEE
DOI :
10.1109/7260.966038
