Frequency-selectable dual-band Wilkinson divider/combiner

Author

Chongcheawchamnan, Mitchai ; Julrat, Sakol ; Shafique, Muhammad Farhan ; Robertson, Ian D.

Author_Institution

Comput. Eng. Dept., Prince of Songkla Univ., Songkhla, Thailand

Volume

7

Issue

10

fYear

2013

fDate

July 16 2013

Firstpage

836

Lastpage

842

Abstract

A technique for realising a compact frequency-selectable dual-band Wilkinson divider/combiner is presented in this study. To provide a frequency-selection function, the band-pass transmission-line transformer (TLT) in a dual-band device is replaced with a tuneable band-reject TLT. To realise this tuneable device, a variable capacitively loaded spur-line filter is proposed for its compact size. The theory based on an ideal transmission-line circuit is developed to provide a design procedure. The proposed circuits are demonstrated with simulated and measured results of a Wilkinson divider/combiner fabricated on FR4 substrate.

Keywords

band-pass filters; frequency dividers; transformers; transmission lines; FR4 substrate; band-pass transmission-line transformer; design procedure; dual-band device; frequency-selectable dual-band Wilkinson divider-combiner; ideal transmission-line circuit; tuneable band-reject TLT; variable capacitively loaded spur-line filter;

fLanguage

English

Journal_Title

Microwaves, Antennas & Propagation, IET

Publisher

iet

ISSN

1751-8725

Type

jour

DOI

10.1049/iet-map.2013.0113

Filename

6576957