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Multi-Wideband Bandpass Filter Using Meandered Stub-Stepped Impedance Resonators for Multiband Application

Teguh Firmansyah(1*), Herudin Herudin(2), Cindy Chairunissa(3), Mudrik Alaydrus(4), Gunawan Wibisono(5)

(1) Department of Electrical Engineering, University of Sultan Ageng Tirtayasa, Indonesia
(2) Department of Electrical Engineering, University of Sultan Ageng Tirtayasa, Indonesia
(3) School of Engineering - Electronics, University of Edinburgh, United Kingdom
(4) Department of Electrical Engineering, Universitas Mercu Buana, Indonesia
(5) Department of Electrical Engineering, Universitas Indonesia, Indonesia
(*) Corresponding author



This paper proposes a multi-wideband bandpass filter (MW-BPF) using meandered stub-stepped impedance resonators (MS-SIR). This research shows that MS-SIR resonator can not only generate five-pass bands, but it also yields wide-fractional bandwidth, good transmission coefficients, and ease of fabrication. A transmission line analysis was used to design and to investigate the filter structure. Furthermore, this filter was fabricated on a FR4 substrate having a  size of 0.08 (G × 0.14 (G, with (G as the wavelength at the first resonant frequency. The MW-BPF achieves the following transmission coefficients/ fractional bandwidth: -0.84 dB / 42.5 %, -1.36 dB / 21.49 %, -1.85 dB / 14.95 %, -2.12 dB / 10.69 %, and -2.11 dB / 6.02%, at 0.44 GHz, 0.88 GHz, 1.30 GHz, 1.77 GHz, and 2.15 GHz, respectively. This filter can be applied to DVB-T400, GSM800/GSM900, GPS1200, WCDMA1800, and LTE2100. The validity of the proposed design has been shown by the good agreement between the simulation and measurement results.
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Bandpass Filter; Meandered; Stepped Impedance Resonators; Wideband

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