A study of waveguide power combiner allowing for the variable number of input ports

Akimichi Hirota; Yukihiro Tahara; Tetsu Owada; Yoshinori Yasunaga; Yuji Sakai; Moriyasu Miyazaki; Hiroaki Miyashita

A study of waveguide power combiner allowing for the variable number of input ports

Akimichi Hirota, Yukihiro Tahara, Tetsu Owada, Yoshinori Yasunaga, Yuji Sakai, Moriyasu Miyazaki, Hiroaki Miyashita

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

Abstract

A high power transmitter frequently consists of two or more SSPAs (Solid State Power Amplifier), and outputs of the power amplifiers are combined by a power combiner. However, when some power amplifiers fail, a power loss in the power combiner increases because the number of the input powers vary. In this paper, a waveguide power combiner allowing for the variable number of input ports is presented. The proposed power combiner is a tournament-shaped combiner in which lengths of lines between T junctions are an odd multiple of a 1/4 wavelength. When some amplifier stops, the powers of each amplifier can be combined with low loss in the proposed combiner, because the lines between the T junctions operate as impedance transformers. The proposed 8-way combiner is simulated and experimentally demonstrated in S-band. The power loss at six amplifiers is 0.25 dB in the experiments.

Original language	English
Title of host publication	2014 Asia-Pacific Microwave Conference Proceedings, APMC 2014
Publisher	Institute of Electrical and Electronics Engineers Inc.
Pages	256-258
Number of pages	3
ISBN (Electronic)	9784902339314
Publication status	Published - 2014 Mar 25
Externally published	Yes
Event	2014 Asia-Pacific Microwave Conference, APMC 2014 - Sendai, Japan Duration: 2014 Nov 4 → 2014 Nov 7

Publication series

Name	2014 Asia-Pacific Microwave Conference Proceedings, APMC 2014

Other

Other	2014 Asia-Pacific Microwave Conference, APMC 2014
Country/Territory	Japan
City	Sendai
Period	14/11/4 → 14/11/7

Keywords

Amplifier
Power combiner
Waveguide

ASJC Scopus subject areas

Computer Networks and Communications
Hardware and Architecture
Electrical and Electronic Engineering

Cite this

Hirota, A., Tahara, Y., Owada, T., Yasunaga, Y., Sakai, Y., Miyazaki, M., & Miyashita, H. (2014). A study of waveguide power combiner allowing for the variable number of input ports. In 2014 Asia-Pacific Microwave Conference Proceedings, APMC 2014 (pp. 256-258). [7067988] (2014 Asia-Pacific Microwave Conference Proceedings, APMC 2014). Institute of Electrical and Electronics Engineers Inc..

A study of waveguide power combiner allowing for the variable number of input ports. / Hirota, Akimichi; Tahara, Yukihiro; Owada, Tetsu et al.

2014 Asia-Pacific Microwave Conference Proceedings, APMC 2014. Institute of Electrical and Electronics Engineers Inc., 2014. p. 256-258 7067988 (2014 Asia-Pacific Microwave Conference Proceedings, APMC 2014).

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

Hirota, A, Tahara, Y, Owada, T, Yasunaga, Y, Sakai, Y, Miyazaki, M & Miyashita, H 2014, A study of waveguide power combiner allowing for the variable number of input ports. in 2014 Asia-Pacific Microwave Conference Proceedings, APMC 2014., 7067988, 2014 Asia-Pacific Microwave Conference Proceedings, APMC 2014, Institute of Electrical and Electronics Engineers Inc., pp. 256-258, 2014 Asia-Pacific Microwave Conference, APMC 2014, Sendai, Japan, 14/11/4.

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AU - Sakai, Yuji

AU - Miyazaki, Moriyasu

AU - Miyashita, Hiroaki

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AB - A high power transmitter frequently consists of two or more SSPAs (Solid State Power Amplifier), and outputs of the power amplifiers are combined by a power combiner. However, when some power amplifiers fail, a power loss in the power combiner increases because the number of the input powers vary. In this paper, a waveguide power combiner allowing for the variable number of input ports is presented. The proposed power combiner is a tournament-shaped combiner in which lengths of lines between T junctions are an odd multiple of a 1/4 wavelength. When some amplifier stops, the powers of each amplifier can be combined with low loss in the proposed combiner, because the lines between the T junctions operate as impedance transformers. The proposed 8-way combiner is simulated and experimentally demonstrated in S-band. The power loss at six amplifiers is 0.25 dB in the experiments.

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A study of waveguide power combiner allowing for the variable number of input ports

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Keywords

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