High Selectivity Wideband Bandpass Filter Based on Transversal Signal-Interaction Concepts Loaded With Open and Shorted Stubs

Cui, Liwei; Wang, Weimin; Zhuang, Zheng; Li, Shulan; Wu, Yongle; Liu, and Yuan'an

doi:10.2528/pierl16101502

Cited by 11 publications

(7 citation statements)

References 14 publications

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“…Bandpass filters are mainly transmission line-based passive devices that are used in many RF/microwave circuits and wireless communication and radar systems. They are essential front-end components that can pass signals within a certain frequency range and reject unwanted out-of-band signals [ 1 , 2 , 3 , 4 , 5 , 6 , 7 , 8 , 9 , 10 , 11 , 12 , 13 , 14 , 15 , 16 , 17 , 18 , 19 , 20 , 21 , 22 , 23 , 24 , 25 , 26 , 27 , 28 , 29 , 30 , 31 , 32 , 33 , 34 ]. There are many parameters to be considered in the design and implementation of a bandpass filter, such as the design structure, size, passband frequency bandwidth, insertion loss, selectivity, roll-off rate, isolation, and stopband rejection.…”

Section: Introductionmentioning

confidence: 99%

“…This type of filter is excellent for multiple frequency systems such as carrier aggregation or wireless local area network (WLAN) bands. Another method for obtaining a wideband response is by modifying the filter structure or attaching other elements to increase the bandwidth—such a method works well for wideband applications [ 19 , 20 , 21 , 22 , 23 , 24 , 25 , 26 , 27 , 28 , 29 , 30 , 31 , 32 ].…”

Section: Introductionmentioning

confidence: 99%

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Dual-Band and Wideband Bandpass Filters Using Coupled Lines and Tri-Stepped Impedance Stubs

Alazemi

2023

Micromachines

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In this paper, two bandpass filters—one with a dual-band response and the other with a wideband response—were designed, implemented, and experimented with. The filters are based on the novel combination of series coupled lines and tri-stepped impedance stubs. However, coupled lines along with tri-stepped impedance open stubs (TSIOSs) give a third-order dual passband response. The advantage of dual-band filters using coupled lines and TSIOSs is that they have wide passbands that are close together and separated by a single transmission zero. In contrast, the inclusion of tri-stepped impedance short-circuited stubs (TSISSs) instead of TSIOSs provides a fifth-order wide passband response. The advantage of wideband bandpass filters using coupled lines and TSISSs is that they have a very good selectivity factor. Theoretical analysis was carried out to validate both filter configurations. The tested bandpass filter using coupled lines and TSIOS units had two close wide passbands operating at 0.92 and 1.52 GHz center frequencies, respectively. The dual-band bandpass filter was implemented to operate in GSM and GPS applications. The first passband had a 3 dB fractional bandwidth (FBW) of 38.04%, while the second passband had a 3 dB FBW of 22.36%. The experimental result of the wideband bandpass filter (with coupled lines and TSISS units) had a center frequency of 1.51 GHz with a 3 dB fractional bandwidth of 62.91% and a selectivity factor of 0.90. A good congruence was demonstrated between the full-wave simulated and tested results for both filters.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Dual-Band and Wideband Bandpass Filters Using Coupled Lines and Tri-Stepped Impedance Stubs

Alazemi

2023

Micromachines

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“…In modern broadband wireless communication systems, there is an urgent need for microwave circuits, which can provide high data rate and high transmission capacity. Recently, various high‐performance wideband bandpass filters (WBBPFs) have been proposed 1‐12 . As a straightforward method, cascading lowpass filter and highpass filter is a practical approach for WBBPF design, 1,2 but it usually suffers from larger circuit dimensions.…”

Section: Introductionmentioning

confidence: 99%

“…However, the fabrication of DGS filter is complicated, and it is difficult to integrate with planar circuits. In References 7‐9, transversal signal interaction concept is introduced to design WBBPF with high selectivity, but the design procedures are tedious and complex. In References 10 and 11, the method of harmonics staggered is introduced in WBBPF and lowpass filter design to obtain wide stopband suppression.…”

Section: Introductionmentioning

confidence: 99%

Design of wideband bandpass filter with high and wide stopband rejection using asymmetrical‐loaded stepped ‐impedance resonator

Xiong¹,

Wang

2020

Int J RF Microw Comput Aided Eng

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This study presents a wideband bandpass filter (WBBPF) with wide and high stopband suppression by loading a stepped-impedance resonator (SIR). The prototype of WBBPF is composed of an inverted π-shaped resonator with T-shaped resonator and open stub loaded, centrally. Odd-/even-mode analysis technique is employed to characterize the resonant properties of this prototype. Then, a SIR is loaded to this filter, asymmetrically, to improve the out-of-band performance. For experimental validation, a WBBPF is designed, fabricated, and tested. The measurement results show that the center frequency of WBBPF is located at 5.095 GHz, and the 3-dB fraction bandwidth is about 71%. Plus, the out-of-band suppression with 30-dB rejection level can be extended to 18.17 GHz.

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“…The design of the BPFs is indispensable to meet the specific demands of consumer electronics and industrial applications. Recently, many planar BPFs with low insertion losses in the passbands and high out-of-band rejections have been reported using signal-interference techniques [7], stub loaded techniques, and so on. Additionally, balanced BPFs have more advantages of noise immunity and low electromagnetic interference in wireless communication systems compared with their single-ended counterparts [8].…”

Section: Introductionmentioning

confidence: 99%

Left-handed metamaterial bandpass filter for GPS, Earth Exploration-Satellite and WiMAX frequency sensing applications

et al. 2019

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Interferences and accuracy problem are one of the most talked issues in today’s world for sensor technology. To deal with this contention, a microstrip framework consisting of a dual mode double negative (DNG) metamaterial based bandpass filter is presented in this article. To obtain the ultimate noise reduction bandpass filter, the proposed structure has to go through a series of development process, where the characteristics of the structure are tested to the limit. This filter is built on Rogers RT-5880 substrate with a 50Ω microstrip line. To pursue the elementary mode of resonant frequency, the ground layer of the structure is kept partially filled and a gradual analysis is executed on the prospective metamaterial (resonator) unit cell. Depending on the developed unit cell, the filter is constructed and fabricated to verify the concept, concentrating on GPS (1.55GHz), Earth Exploration-Satellite (2.70GHz) and WiMAX (3.60GHz) bands of frequencies. Moreover, the structure is investigated using Nicolson–Ross–Weir (NRW) approach to justify the metamaterial characteristics, and also tested on S-parameters, current distribution, electric and magnetic fields and quality factor. Having a propitious architecture and DNG characteristics, the proposed structure is suitable for bandpass filter for GPS, Earth Exploration-Satellite and WiMAX frequency sensing applications.

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High Selectivity Wideband Bandpass Filter Based on Transversal Signal-Interaction Concepts Loaded With Open and Shorted Stubs

Cited by 11 publications

References 14 publications

Dual-Band and Wideband Bandpass Filters Using Coupled Lines and Tri-Stepped Impedance Stubs

Dual-Band and Wideband Bandpass Filters Using Coupled Lines and Tri-Stepped Impedance Stubs

Design of wideband bandpass filter with high and wide stopband rejection using asymmetrical‐loaded stepped ‐impedance resonator

Left-handed metamaterial bandpass filter for GPS, Earth Exploration-Satellite and WiMAX frequency sensing applications

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