A novel series diode linearizer for mobile radio power amplifiers

• Published in: 1996 IEEE MTT-S International Microwave Symposium Digest Vol. 2; pp. 831 - 834 vol.2
• Main Authors: Yamauchi, K., Mori, K., Nakayama, M., Itoh, Y., Mitsui, Y., Ishida, O.
• Format: Conference Proceeding
• Language: English
• Published: IEEE 1996
• Subjects: Capacitance; Capacitors; Diodes; Equivalent circuits; Fourier transforms; Impedance; Land mobile radio; Microwave Theory and Techniques Society; Phase measurement; Power amplifiers
• ISBN: 0780332466; 9780780332461
• ISSN: 0149-645X; 2576-7216
• DOI: 10.1109/MWSYM.1996.511066

A novel series diode linearizer has been developed for mobile radio power amplifiers. It is composed of a series diode with a parallel capacitor, which provides positive amplitude and negative phase deviations with the increase of input power, and can compensate AM-AM and AM-PM distortions of power amplifiers. Applying this linearizer to 1.9 GHz MMIC power amplifier for the Japanese Personal Handy-phone System (PHS), an improvement of adjacent channel leakage power (ACP) up to 5 dB has been achieved for the /spl pi//4-shifted QPSK modulated signal.