Microstrip Dual-Band Bandpass Filter Using U-Shaped Resonators

Ogbodo, Eugene A.; Wang, Yi; Yeo, Kenneth Siok Kiam

doi:10.2528/pierl15072303

Cited by 15 publications

(5 citation statements)

References 11 publications

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“…The first resonator was set to operate in a threeresonance mode [39], its structure is shown in Figure 1. Such a U-shaped resonator is a very simple construction which is one of the most widely used in various microwave devices including sensors [3,[59][60][61][62]. Depending on the dimensions, such devices have various AFCs and purposes.…”

Section: Microstrip Microwave Resonatorsmentioning

confidence: 99%

“…The following parameters of the resonator are shown in Figure 1: G x = 35 mm, G yl = 20 mm, G yt = 28 mm, x h = 13.25 mm, y h = 174.16 mm, x s = 0.61, y s = 0.325, y p = 0.019. Depending on the ratio of these parameters, devices with completely different amplitude-frequency characteristics and purposes can be obtained [3,60,62]. Figure 2 shows the results of the AFC measurement performed using the electrodynamic numerical analysis for the resonator presented in Figure 1.…”

Section: Microstrip Microwave Resonatorsmentioning

confidence: 99%

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The Automatic Design of Multimode Resonator Topology with Evolutionary Algorithms

Stanovov

Khodenkov²,

Popov³

et al. 2022

Sensors

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Microwave electromagnetic devices have been used for many applications in tropospheric communication, navigation, radar systems, and measurement. The development of the signal preprocessing units including frequency-selective devices (bandpass filters) determines the reliability and usability of such systems. In wireless sensor network nodes, filters with microstrip resonators are widely used to improve the out-of-band suppression and frequency selectivity. Filters based on multimode microstrip resonators have an order that determines their frequency-selective properties, which is a multiple of the number of resonators. That enables us to reduce the size of systems without deteriorating their selective properties. Various microstrip multimode resonator topologies can be used for both filters and microwave sensors, however, the quality criteria for them may differ. The development of every resonator topology is time consuming. We propose a technique for the automatic generation of the resonator topology with required frequency characteristics based on the use of evolutionary algorithms. The topology is encoded into a set of real valued parameters, which are varied to achieve the desired features. The differential evolution algorithm and the genetic algorithm with simulated binary crossover and polynomial mutation are applied to solve the formulated problem using the dynamic penalties method. The experimental results show that our technique enables us to find microstrip resonator topologies with desired amplitude-frequency characteristics automatically, and manufactured devices demonstrate characteristics very close to the results of the algorithm. The proposed algorithmic approach may be used for automatically exploring the new perspective topologies of resonators used in microwave filters, radar antennas or sensors, in accordance with the defined criteria and constraints.

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Section: Microstrip Microwave Resonatorsmentioning

confidence: 99%

Section: Microstrip Microwave Resonatorsmentioning

confidence: 99%

The Automatic Design of Multimode Resonator Topology with Evolutionary Algorithms

Stanovov

Khodenkov²,

Popov³

et al. 2022

Sensors

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“…Jin et al used OSLSSIR resonators which included a two‐end‐shorted three‐section SIR with two identical open stubs loaded at its impedance junctions and led to the design of one‐, two‐, three‐ and four‐band filters 6,7 . The U‐shaped resonators have also been designed to form the DB‐BPFs 8 . However, the DB‐BPF exhibits large size and relatively high insertion losses in the passbands as well.…”

Section: Introductionmentioning

confidence: 99%

“…6,7 The U-shaped resonators have also been designed to form the DB-BPFs. 8 However, the DB-BPF exhibits large size and relatively high insertion losses in the passbands as well. Some DB-BPFs based on the unit wavelength resonators have been studied.…”

Section: Introductionmentioning

confidence: 99%

A new compact microstrip dual bandpass filter using stepped impedance and λ /2 bended resonators

Moattari

Bijari

Razavi

2021

Int J RF Mic Comp-Aid Eng

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In this paper, a compact dual‐band bandpass filter (DB‐BPF) is implemented by using a pair of coupled stepped impedance resonators (SIRs) and a pair of λ/2 bended resonators for the modern wireless communication systems such as WiMAX and WLAN (3.4 and 5.4‐GHz). The physical layout is presented and explained the establishment of an LC equivalent circuit. Moreover, the second passband of the proposed dual‐band bandpass filter can be independently controlled by inserting the open‐circuited stubs at the end of the λ/2 bended resonators without increasing the circuit size. Simulation results show that the second passband can be ranged from 5.6 to 4.8‐GHz with the bandwidth of 400 ± 96‐MHz, whereas the first passband is fixed with the bandwidth of 280 ± 8.5‐MHz. The measured results exhibit the insertion losses (S21) lower than 1.2 and 1.4 dB, and the return losses (S11) of −23 and −32 dB at the first and second passbands, respectively, which show a good agreement with simulation results. The dual‐band microstrip filter is fabricated on RT/Rogers 4003 substrate with a compact size of 0.24λg × 0.25λg.

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“…Some authors have proposed to design dual-/triple-band filters using asymmetrical CLs [9] or using CLs and grounded stepped impedance resonators (SIRs) [10]. Recently, the dual-band BPFs with high selectivity have been introduced using two different resonators [11], and U-shaped resonators [12]. Composite coupling structure for coplanar waveguide/microstrip [13] and complementary split-ring resonators with complementary spiral resonator [14] have been adopted in the development of dual-band BPFs.…”

Section: Introductionmentioning

confidence: 99%

Compact Dual-Band Bandpass Filter Using U-Shaped Stepped-Impedance Resonators with Parallel Coupled Structures

Sung

2018

J Electromagn Eng Sci

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This paper proposes a dual-band bandpass filter using stepped-impedance resonators (SIRs) with parallel coupled structures. The proposed filter adopts U-shaped SIRs with parallel coupled lines (PCLs) that have interdigital and comb-line shorted ends. The central PCLs build an upper passband and a transmission zero, and the two U-shaped SIRs build a lower passband. Four resonators and coupling structures are theoretically analyzed to derive its scattering parameters. A novel dual-band bandpass filter is designed and fabricated using the induced scattering characteristics. The measured results show that the fabricated dual-band bandpass filter has an insertion loss of less than 1.02 dB in the lower band of 2.45 GHz and of 3.01 dB in the upper band of 3.42 GHz, and a band-to-band isolation of more than 40 dB, from 3.14 to 3.2 GHz. This is an Open-Access article distributed under the terms of the Creative Commons Attribution Non-Commercial License (http://creativecommons.org/licenses/by-nc/4.0) which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited. ⓒ

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Microstrip Dual-Band Bandpass Filter Using U-Shaped Resonators

Cited by 15 publications

References 11 publications

The Automatic Design of Multimode Resonator Topology with Evolutionary Algorithms

The Automatic Design of Multimode Resonator Topology with Evolutionary Algorithms

A new compact microstrip dual bandpass filter using stepped impedance and λ /2 bended resonators

Compact Dual-Band Bandpass Filter Using U-Shaped Stepped-Impedance Resonators with Parallel Coupled Structures

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