Novel tunable band reject filter using RF MEMS technology

Author

Pradhan, Buddhadev ; Gupta, Bhaskar

Author_Institution

Dept. of Electron. & Tele-Commun. Eng., Jadavpur Univ., Kolkata, India

fYear

2014

fDate

Feb. 28 2014-March 2 2014

Firstpage

335

Lastpage

340

Abstract

A novel tunable band reject filter is designed and simulated using metamaterials and RF MEMS technology. CSRR on CPW line are used to achieve filter characteristics, while tunability is ensured through incorporation of a MEMS variable capacitor, enabling compatibility with planar IC technology. The CSRRs are etched on both the signal line and ground planes of the CPW with different CSRR structures. Tunability of the band reject filter is achieved by putting the MEMS bridge in either up or down state. The designed band stop filter rejection of stop bands are around -19.87 dB for down state around the centre frequency 29.719GHz and -17.96dB for up state around the centre frequency 33.172GHz. The proposed device structure is simulated using ANSOFT HFSS v13® for RF analysis.

Keywords

band-stop filters; capacitors; coplanar waveguides; metamaterials; micromechanical devices; microwave filters; millimetre wave filters; ANSOFT HFSS v13; CPW line; CSRR structures; MEMS bridge; MEMS variable capacitor; RF MEMS technology; RF analysis; band stop filter rejection; frequency 29.719 GHz; frequency 33.172 GHz; ground planes; metamaterials; planar IC technology; signal line; stop bands; tunable band reject filter; Bridge circuits; Coplanar waveguides; Filtering theory; Micromechanical devices; Microwave filters; Radio frequency; Resonator filters; CSRRs Band Reject Filter; RF MEMS; RF characterization; device structure; equivalent model;

fLanguage

English

Publisher

ieee

Conference_Titel

Students' Technology Symposium (TechSym), 2014 IEEE

Conference_Location

Kharagpur

Print_ISBN

978-1-4799-2607-7

Type

conf

DOI

10.1109/TechSym.2014.6808071

Filename

6808071