A Compact Bandpass Filter Using A T-Shaped Loaded Open-ended Stub Resonator

This paper proposes a compact bandpass filter using a loaded open-ended T-shaped stub. The open-ended T-shaped stub is loaded with vertical resonators placed across. The key advantage of using vertical resonators in the design is the simplicity and low insertion loss it provides. The structure used is an open-ended stub attached on one end to the transmission line (λ/2) to form a T-shaped resonator (λ/4) having vertical resonators placed across. The vertical resonator position alters the position at which the transmission zero occurs. A pair of the T-shaped resonator is placed on parallel sides of the feed line. The proposed filter is designed with the aid of Computer Simulation Technology Microwave Studio Software. The proposed concept is verified by designing filters with four different vertical resonator positions. The filter possesses a good rejection and low insertion loss of < 2dB with Chebyshev response. This filter is suited for modern-day communication applications since it shows good rejection of out of band signals.

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A CRLH TL Transmission Line Structure and its Application to Bandpass Filter Design

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.446-447.865 ◽

2013 ◽

Vol 446-447 ◽

pp. 865-868

Author(s):

Ya Lin Guan ◽

Xin Kun Tang ◽

Shi Lei Zhou

Keyword(s):

Transmission Line ◽

Insertion Loss ◽

Bandpass Filter ◽

Filter Design ◽

Left Handed ◽

Relative Bandwidth ◽

Low Pass ◽

Band Pass ◽

Low Insertion Loss ◽

High Pass

In this paper, a novel bandpass filter (BPF) using the composite right/left-handed transmission line (CRLH-TL) theory is presented.The composite right/left-handed TL with the high-pass characters of left-handed transmission line (LH-TL) and the low-pass characters of right-handed transmission line (RH-TL) are used to construct the bandpass filter.Using this theory,we design a bandpass filter which have an obvious band pass response with a wide passband range from 5.1to 12.9GHz and a low insertion loss of less than 3.1dB. The relative bandwidth is close to 110%. Simulation using ADS demonstrated the viability of the approach.

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A dual-wideband bandpass filter using open/shorted coupled lines

International Journal of Microwave and Wireless Technologies ◽

10.1017/s1759078718001253 ◽

2018 ◽

Vol 10 (10) ◽

pp. 1113-1117

Author(s):

Xiao-Le Bo ◽

Yong-Hong Zhang ◽

Xiao-Kun Li ◽

Yang Yang ◽

Yin Tian ◽

...

Keyword(s):

Insertion Loss ◽

High Selectivity ◽

Bandpass Filter ◽

Wide Bandwidth ◽

Adjustment Method ◽

Transmission Zero ◽

Folded Structure ◽

Coupled Lines ◽

Low Insertion Loss ◽

Adjustable Range

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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