A study of matching capacitor´s influence on power amplifier performance

Author

Fan, Derui ; Chen, Zhang ; Li, Zhuang

Author_Institution

Nanjing Telecommun. Inst., Nanjing, China

fYear

2009

fDate

27-29 Oct. 2009

Firstpage

1006

Lastpage

1008

Abstract

In the design of a 15 W power amplifier from 600 MHz to 1000 MHz, we analyze and compare the characteristics of the capacitors used in the matching circuits. We build a surface-mount capacitor model and put it into the amplifier simulation. By this way, we study the matching capacitor´s influence on the amplifier performance. The simulation result illustrates that there are great difference between using ideal capacitors and using actual capacitors. General purpose capacitors are not qualified for matching completely. RF ceramic surface-mount capacitors may also worsen the amplifier performance such as power out, gain and efficiency. The worsening degree increases evidently along with the working frequency.

Keywords

UHF power amplifiers; ceramic capacitors; surface mount technology; RF ceramic surface-mount capacitors; frequency 600 MHz to 1000 MHz; matching capacitor; matching circuits; power 15 W; power amplifier performance; Capacitors; Ceramics; Circuit simulation; Dielectric substrates; Performance analysis; Power amplifiers; Power generation; Radio frequency; Radiofrequency amplifiers; Surface resistance; RF ceramic capacitor; equivalent serial resistance (ESR); parasitic effect; power dissipation; power-added efficiency (PAE);

fLanguage

English

Publisher

ieee

Conference_Titel

Microwave, Antenna, Propagation and EMC Technologies for Wireless Communications, 2009 3rd IEEE International Symposium on

Conference_Location

Beijing

Print_ISBN

978-1-4244-4076-4

Type

conf

DOI

10.1109/MAPE.2009.5355848

Filename

5355848