Advanced lumped-element trisection filter for digital microwave power amplifiers

Author

Martinez-Mendoza, Monica ; Wentzel, A. ; Heinrich, W. ; Alvarez Melcon, A.

Author_Institution

Ferdinand Braun Inst., Berlin, Germany

fYear

2014

fDate

6-9 Oct. 2014

Firstpage

548

Lastpage

551

Abstract

In this paper, a compact lumped element bandpass reconstruction filter for digital microwave power amplifier applications in the 800 MHz band is presented. The filter, based on the trisection topology, includes a cross coupling which produces a transmission zero for maximum selectivity. In contrast to common filter designs the input impedance characteristic is optimized broadband to values different from 50 Ω, as is required for proper amplifier operation. The filter achieves an insertion loss of 0.8 dB and an equiripple bandwidth of 240 MHz, with improved out-of-band suppression.

Keywords

band-pass filters; coupled circuits; microwave power amplifiers; advanced lumped-element trisection filter; bandwidth 240 MHz; broadband; compact lumped element bandpass reconstruction filter; cross coupling; digital microwave power amplifier; frequency 800 MHz; input impedance characteristic; insertion loss; loss 0.8 dB; maximum selectivity; out-of-band suppression; transmission zero; trisection topology; Band-pass filters; Filtering theory; Impedance; Inverters; Microwave filters; Power amplifiers; Resonator filters; Filters; class D; class S; digital; lumped; power amplifiers;

fLanguage

English

Publisher

ieee

Conference_Titel

Microwave Conference (EuMC), 2014 44th European

Conference_Location

Rome

Type

conf

DOI

10.1109/EuMC.2014.6986492

Filename

6986492