Parallel coupled-line bandpass filter with branch-line shape for G-band frequency

Hwang, C.J., Lok, L.B., Thayne, I.G. and Elgaid, K. (2009) Parallel coupled-line bandpass filter with branch-line shape for G-band frequency. Electronics Letters, 45(16), pp. 838-839. (doi:10.1049/el.2009.0716)

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A parallel coupled-line planar bandpass filter (BPF) with branch-line shape using coplanar waveguide technology on GaAs substrate is presented. The unit parallel coupled-line BPF utilises a parallel coupledline resonator with an open-ended stub which has suppression response of spurious band. Four unit parallel coupled-line BPFs are integrated with branch-line shape and open-circuit stubs on input and output ports are also integrated for improvement of rejection performance. The proposed fourth-order filter was fabricated on GaAs substrate with dielectric thickness of 50 mm and gold thickness of 1.2 mu m. The fabricated fourth-order BPF shows a 3 dB bandwidth from 177 to 209 GHz frequency range with insertion loss of 6.5 dB, rejection of 38 dB and return loss better than 12 dB. It has a high resolution fractional bandwidth of 17%.

Item Type:Articles
Keywords:Band, bandpass filter, engineering, england, frequencies, gaas, performance, resolution, substrate, suppression, technologies, technology, thickness
Glasgow Author(s) Enlighten ID:Lok, Dr Lai Bun and Thayne, Professor Iain and Elgaid, Dr Khaled
Authors: Hwang, C.J., Lok, L.B., Thayne, I.G., and Elgaid, K.
College/School:College of Science and Engineering > School of Engineering > Electronics and Nanoscale Engineering
Journal Name:Electronics Letters
Journal Abbr.:Electron. lett.
Publisher:The Institution of Engineering & Technology
ISSN (Online):1350-911X
Published Online:28 July 2009

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Project CodeAward NoProject NamePrincipal InvestigatorFunder's NameFunder RefLead Dept
400041Electronics Design Centre for Heterogeneous SystemsDavid CummingEngineering & Physical Sciences Research Council (EPSRC)EP/D501288/1ENG - ENGINEERING ELECTRONICS & NANO ENG