A novel reconfigurable impedance matching network using DGS and MEMS switches for millimeter-wave applications

This paper presents a novel approach in order to construct low-loss reconfigurable impedance matching networks and tuners using MEMS series-contact switches and periodic defected-ground-structures (DGSs) implemented on coplanar waveguide (CPW) transmission lines. The application of DGSs results in a...

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Bibliographic Details
Published in2008 IEEE MTT-S International Microwave Symposium Digest pp. 145 - 148
Main Authors Fouladi, S., Akhavan, A., Mansour, R. R.
Format Conference Proceeding
LanguageEnglish
Published IEEE 01.06.2008
Subjects
Coplanar waveguides
defected-ground-structure (DGS)
Impedance
Impedance matching
impedance tuner
Integrated circuit modeling
MEMS series-contact switch
Power transmission lines
Radio frequency
reconfigurable matching network
RF MEMS
Tuners
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Summary:This paper presents a novel approach in order to construct low-loss reconfigurable impedance matching networks and tuners using MEMS series-contact switches and periodic defected-ground-structures (DGSs) implemented on coplanar waveguide (CPW) transmission lines. The application of DGSs results in an improved insertion loss and power handling capability compared to the conventional RF MEMS impedance tuning networks. The proposed structure consists of 12 DGSs and RF MEMS series-contact switches producing 4096 (2 12 ) impedance states. The tunable matching network was fabricated on an alumina substrate and is only 1.3×3.6 mm in size. The measured results demonstrate wide coverage of the Smith chart with a maximum VSWR of 12:1 at 60 GHz. The measured loss of the network when used to match a 10 Ω load to 50 Ω from 22 GHz up to 40 GHz is only 0.5 dB.
ISBN:1424417805
9781424417803
ISSN:0149-645X
2576-7216
DOI:10.1109/MWSYM.2008.4633124