A novel low loss microwave multiplexer design based on directional filters

Author

Neubauer, Volker ; Mayer, Markus ; Magerl, Gottfried

Author_Institution

Dept. of Meas. Techniques & Circuit Design, Vienna Univ. of Technol., Austria

fYear

2002

fDate

2002

Firstpage

257

Lastpage

260

Abstract

A novel design method for directional filters is presented which reduces transmission loss and insertion loss. The theoretical background of directional filters is given, the frequency characteristics and transmission loss are discussed and parameters responsible for the requirements of a low loss application are worked out. A 50 Ω multiplexer was built to act as a bandpass filter bank to separate the fundamental, second and third harmonic frequencies at the input and at the output of a digital audio broadcast (DAB) power amplifier. Finally, measurement results are compared with simulations and the improvements with respect to multiplexers previously presented are pointed out.

Keywords

channel bank filters; digital audio broadcasting; directional couplers; microwave filters; microwave power amplifiers; mobile radio; multiplexing equipment; DAB power amplifier; bandpass filter bank; digital audio broadcast; directional filters; frequency characteristics; harmonic frequencies; insertion loss; low loss microwave multiplexer; mobile communications; transmission loss; Band pass filters; Design methodology; Filter bank; Frequency; Insertion loss; Microwave filters; Multiplexing; Power harmonic filters; Power system harmonics; Propagation losses;

fLanguage

English

Publisher

ieee

Conference_Titel

Radio and Wireless Conference, 2002. RAWCON 2002. IEEE

Print_ISBN

0-7803-7458-4

Type

conf

DOI

10.1109/RAWCON.2002.1030166

Filename

1030166