Wang, Yi, Ke, Maolong, Lancaster, M.J. and Huang, F. (2009) Micromachined millimeter-wave rectangular-coaxial branch-line coupler with enhanced bandwidth. IEEE Transactions on Microwave Theory and Techniques, 57 (7). pp. 1655-1660. ISSN 0018-9480 (doi:https://doi.org/10.1109/TMTT.2009.2021872)

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Abstract

Wideband millimeter-wave branch-line couplers have been demonstrated using micromachined air-filled rectangular-coaxial lines supported by quarter-wavelength stubs. The coaxial lines are constructed by bonding five layers of gold-plated silicon or SU8 slices. The measured coupler shows an insertion loss of 3.2-4.0 dB in the coupled and thru ports between the frequencies 31.3-47.6 GHz. The isolation is better than 12.8 dB, and the return loss less than -10 dB. In addition to providing support, the stubs enhance bandwidth when properly placed.

Item Type:	Article
Additional Information:	[1] Date of Publication : 26 May 2009. Date of Current Version : 10 July 2009. Issue Date : July 2009.
Uncontrolled Keywords:	couplers, micromachining, millimeter-wave devices
Subjects:	T Technology > TK Electrical engineering. Electronics Nuclear engineering
Pre-2014 Departments:	School of Engineering School of Engineering > Department of Computer & Communications Engineering School of Engineering > Mobile & Wireless Communications Research Laboratory
Related URLs:	Publisher Organisation
Last Modified:	14 Oct 2016 09:21
URI:	http://gala.gre.ac.uk/id/eprint/8452

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