Design of a Low Insertion Loss and High Selectivity Bandpass Filter at the Terahertz Band

AbstractA compact dual-wideband (DWB) bandpass filter utilizing open-shorted coupled lines (OSCL) is proposed in this paper. The introduction of the folded structure not only reduces the overall size but also contribute to the split of the transmission zero (TZ), which improves the selectivity effectively. Six transmission poles and five TZs are realized utilizing the shorted-circuit stub and OSCL. The characteristic of the flexible adjustment method of TZs guarantees an independently wide adjustable range of the bandwidth. For demonstration, a DWB filter (3 dB bandwidth 120 and 28%, respectively) is designed and fabricated. The filter is compact and has the characteristics of extraordinary wide bandwidth, low insertion loss, as well as high selectivity.

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Low Insertion-Loss MMIC Bandpass Filter Using Lumped-Distributed Parameters for 5G Millimeter-Wave Application

IEEE Transactions on Components Packaging and Manufacturing Technology ◽

10.1109/tcpmt.2020.3039987 ◽

2020 ◽

pp. 1-1

Author(s):

Guangxu Shen ◽

Wenquan Che ◽

Wenjie Feng ◽

Yongrong Shi ◽

Yiming Shen

Keyword(s):

Millimeter Wave ◽

Insertion Loss ◽

Bandpass Filter ◽

Distributed Parameters ◽

Low Insertion Loss

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Dual band Stepped Impedance Interdigital Microstrip Filter for LTE Bands

European Journal of Engineering Research and Science ◽

10.24018/ejers.2019.4.7.1407 ◽

2019 ◽

Vol 4 (7) ◽

pp. 28-30

Author(s):

William Johnson ◽

Cavin Roger Nunes ◽

Savio Sebastian Dias ◽

Siddhi Suresh Parab ◽

Varsha Shantaram Hatkar

Keyword(s):

Insertion Loss ◽

Bandpass Filter ◽

Dual Band ◽

Band Pass Filter ◽

Coupled Resonators ◽

Microstrip Filter ◽

Resonant Frequencies ◽

Pass Filter ◽

Band Pass ◽

Low Insertion Loss

In this paper, a dual band microstrip bandpass filter has been proposed utilizing three edge coupled resonators, interdigital stubs and DGS technique. To enhance the coupling degree, two interdigital coupled feed lines are employed in this filter. The suppressing cell consists of stepped impedance ladder type resonators, which provides a wide stopband. The proposed suppressing cell has clear advantages like low insertion loss in the passband and suitable roll off. The frequency response of the filter looks like a standard dual band band-pass filter. The filter exhibits a dual passband with resonant frequencies at 2.2GHz and 3.45GHz covers LTE1 and LTE22 bands.

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Miniaturized Dual-Band Bandpass Filter Using Embedded Dual-Mode Resonator with Controllable Bandwidths

Frequenz ◽

10.1515/freq-2015-0195 ◽

2016 ◽

Vol 70 (9-10) ◽

Author(s):

Chuanming Zhu ◽

Jin Xu ◽

Wei Kang ◽

Zhenxin Hu ◽

Wen Wu

Keyword(s):

Insertion Loss ◽

Degrees Of Freedom ◽

Bandpass Filter ◽

The Other ◽

Dual Band ◽

Dual Mode ◽

Transmission Zeros ◽

Low Insertion Loss ◽

Multiple Transmission ◽

Mode Resonator

AbstractIn this paper, a miniaturized dual-band bandpass filter (DB-BPF) using embedded dual-mode resonator (DMR) with controllable bandwidths is proposed. Two passbands are generated by two sets of resonators operating at two different frequencies. One set of resonators is utilized not only as the resonant elements that yield the lower passband, but also as the feeding structures with source-load coupling to excite the other to produce the upper passband. Sufficient degrees of freedom are achieved to control the center frequencies and bandwidths of two passbands. Moreover, multiple transmission zeros (TZs) are created to improve the passband selectivity of the filter. The design of the filter has been demonstrated by the measurement. The filter features not only miniaturized circuit sizes, low insertion loss, independently controllable central frequencies, but also controllable bandwidths and TZs.

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