On‐chip miniaturised wideband rat‐race coupler using integrated passive device technology | Zendy

Tseng YingCheng | Zendy; Ma TzyhGhuang | Zendy

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On‐chip miniaturised wideband rat‐race coupler using integrated passive device technology

Author(s) -

Tseng YingCheng,

Ma TzyhGhuang

Publication year - 2014

Publication title -

iet microwaves, antennas and propagation

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.555

H-Index - 69

eISSN - 1751-8733

pISSN - 1751-8725

DOI - 10.1049/iet-map.2013.0446

Subject(s) - rat race coupler , wideband , chip , hybrid coupler , electronic engineering , electrical engineering , materials science , engineering , power dividers and directional couplers

In this study, a miniaturised wideband rat‐race coupler using glass integrated passive device (GIPD) technology is studied. The circuit miniaturisation is achieved using slow‐wave synthesised coplanar waveguides (CPWs). For wideband operation, a compact CPW phase inverter is developed and integrated. At the centre frequency, 12 GHz, the proposed rat‐race coupler is only 6.5% the size of a conventional 1.5‐λ g ring coupler with the same GIPD technology; the fractional bandwidths, on the other hand, reach 65 and 32%, respectively, at the sum and difference ports. The coupler shows good amplitude and phase balances, with the transmission loss around 0.7–1.1 dB at the centre frequency.

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