Load modulation for high power applications based on printed ceramics

Author

Wiens, Andrew ; Arnous, Mhd Tareq ; Maune, Holger ; Sazegar, M. ; Nikfalazar, Mohammad ; Kohler, Christoph ; Binder, Joachim R. ; Boeck, Georg ; Jakoby, Rolf

Author_Institution

Inst. fur Mikrowellentech. und Photonik, Tech. Univ. Darmstadt, Darmstadt, Germany

fYear

2013

fDate

2-7 June 2013

Firstpage

1

Lastpage

4

Abstract

This paper addresses the design and measurement of a low cost tunable impedance matching network (TMN) employing Barium-Strontium-Titanate (BST) for high frequency and high power applications. Based on requirements of a class AB mode high power amplifier, a pi-topology circuit was designed, photo-lithographically processed and measured. The work demonstrates a tunable matching network, transforming low impedance Z_i=(4..13)-(3.5..13)j Ohm to a fixed 50 Ohm load, exhibiting insertion losses of not more than 0.9dB at 2.0 GHz. For initial testing, a tunable PA was designed by implementing the TMN at its output. First system measurements show an output power of 40.5dBm with a drain efficiency of 58% at 2.0 GHz.

Keywords

UHF power amplifiers; barium compounds; ceramics; impedance matching; photolithography; BST; BaSrTiO₃; TMN; barium-strontium-titanate; class AB mode high power amplifier; efficiency 58 percent; frequency 2.0 GHz; insertion losses; load modulation; low cost tunable impedance matching network; photolithography; pi-topology circuit; printed ceramics; resistance 50 ohm; tunable PA; Impedance; Impedance matching; Insertion loss; Microwave circuits; Power measurement; Tuning; Varactors; Ceramics; adaptive matching; ferroelectrics; power amplifiers; tunable components;

fLanguage

English

Publisher

ieee

Conference_Titel

Microwave Symposium Digest (IMS), 2013 IEEE MTT-S International

Conference_Location

Seattle, WA

ISSN

0149-645X

Print_ISBN

978-1-4673-6177-4

Type

conf

DOI

10.1109/MWSYM.2013.6697548

Filename

6697548