Novel DC-biasing circuits with arbitrary harmonics-control capability for compact high-efficiency power amplifiers. Issue 7 (22nd April 2019)

• Record Type: Journal Article
• Authors: Tanaka, Shinichi; Oda, Tomoya; Saiki, Kento
• Editors: Kulpa, Krzysztof; Weinmann, Frank; Boria, Vicente E.; Martín, Teresa; Burgos, Mateo
• Is Part Of: International journal of microwave and wireless technologies. Volume 11:Issue 7(2019)
• Page Start: 618
• Page End: 624
• Publication Date: 2019-04-22
• Subjects: Power amplifiers, -- Class-F amplifiers, -- Power-added efficiency, -- Harmonic tuning techniques, -- Composite right-/left-handed transmission lines, -- DC-biasing circuit, -- Dispersion diagram; Wireless communication systems -- Periodicals; Microwave circuits -- Periodicals; Radio frequency -- Periodicals; 621.381305
• DOI: 10.1017/S1759078719000473
• Languages: English
• ISSNs: 1759-0787

Abstract

Abstract: The next generation mobile communication systems impose challenging performance, size, and cost requirements on the power amplifiers (PAs). This paper presents novel DC-biasing circuits, which are compact and yet can control the harmonics almost arbitrarily. The proposed circuit consists of a composite right-/left-handed (CRLH) transmission line (TL) stub, of which the size and harmonics-control function can be tuned by modifying the dispersion diagram of the stub line. As a proof of concept, a compact 2-GHz 7-W GaN HEMT class-F PA using the versatile CRLH-TL stubs was fabricated, demonstrating 85.8% drain efficiency and 77.3% power-added efficiency.