Novel Microstrip Hairpinline Narrowband Bandpass Filter Using via Ground Holes

Hasan, Aamir; Nadeem, Ahmed Ejaz

doi:10.2528/pier07091401

Cited by 37 publications

(25 citation statements)

References 23 publications

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“…The choice of the resonator plays an important role for realizing a compact filter. Sub-wavelength structures such as open-loop resonators, splitring resonators (SRRs), miniaturized hair-pin resonators and other microstrip structures have been successfully used to design compact filters at microwave frequencies [5,[13][14][15][16][17][18][19][20][21][22][23], since these resonators can be designed with dimensions much smaller than the signal wavelength at their resonant frequency. Broadside coupled split-ring resonators with cross coupling are chosen to serve the purpose of implementing the multilayer filter compared to the conventional splitring resonators [12] to eliminate the cross-polarization effects [24] and to realize miniaturized structures.…”

Section: Introductionmentioning

confidence: 99%

Compact Two-Layer Microstrip Bandpass Filters Using Broadside-Coupled Resonators

Vegesna¹,

Saed²

2012

PIER B

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Abstract-This paper presents a design methodology for realizing broadside-coupled microstrip bandpass filters on multilayer substrates to reduce the size of the filter. The new filter configuration consists of broadside coupled split-ring resonators on two layers backed by a ground plane. With the proposed new method, miniaturization to a greater extent can be achieved compared to the conventional method of realizing microstrip multilayer filters. In addition, coupling apertures in the ground plane used to achieve coupling among the resonators in conventional multilayer structures are eliminated. The proposed design is more flexible compared to traditional multilayer filters. Layers can be easily added to increase the filter order. To demonstrate the method, a miniaturized two-layered bandpass filter centered at 728 MHz with low insertion loss is implemented and investigated. Miniaturization of more than 25% is achieved compared to the conventional broadside coupled structure and more than 40% miniaturization compared to the edge coupled structure. The new microstrip filter discussed in this paper can be realized using simple fabrication techniques.

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Section: Introductionmentioning

confidence: 99%

Compact Two-Layer Microstrip Bandpass Filters Using Broadside-Coupled Resonators

Vegesna¹,

Saed²

2012

PIER B

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“…The filter consists of two open loop resonators in a C-shape configuration with half-wavelength as in Figure 1(a), which normally exhibits a single passband response at LTE band 750 MHz with size of 20 × 40.2 mm 2 as in [1]. The main C-shape resonator structure has been replaced with spiral-shaped resonator embedded inside the compact size of open loop resonators, the new size is 24.2 mm × 12 mm (0.15λ g × 0.075λ g ) as in Figure 1(b), with 64% size reduction as compared to the same traditional size of 40.2 mm × 20 mm (0.25λ g × 0.125λ g ) at λ g is the guide wavelength at LTE band, with the non-zero feed as shown in Figure 2(a).…”

Section: Structure and Design Considerations Of Microstrip Resonatorsmentioning

confidence: 99%

“…Therefore, the multiband filters have been gaining wide attention in recent years. Dual-band filter is the most common multiband filter, which has been analyzed deeply in many articles with various configurations [1][2][3][4][5][6]. The dual-band filters were reported in [4][5][6] using SLR.…”

Section: Introductionmentioning

confidence: 99%

A Very Compact Novel Multi-Band BPF for Recent Mobile/Satellite Communication Systems

Mohamed¹,

El-Shaarawy²,

Abdallah³

et al. 2014

PIER C

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Abstract-This paper presents a novel compact dual-tri bandpass microstrip filter employing meander and open stub loaded resonators. With the proposed technique, a simple transformation from dual-band to tri-band BPF is realized. A novel structure using embedded resonators is designed to generate multiband response. The main resonators control the low-band resonant frequency, the meander resonators control the two high-band resonant frequency and the open stub resonators control the high-band resonant frequency. The meander/stub resonators are embedded into the main spiral resonators, which makes the filter compact where its size is reduced by 64% compared to traditional filters. Passbands improvements and high selectivity are realized by the short circuit stubs which generate additional transmission zeros. The proposed filter has advantages such as low insertion loss, compact size and high selectivity. The theory is validated using the commercial full-wave solver CST 2012. Finally, the proposed structure is implemented and the measurement results are found to be in good agreement with the simulation results.

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“…In this approach, we have chosen 3rd order Chebyshev filter with 2% bandwidth. The filter can be designed using the following equations [33,34].…”

Section: Chebyshev Filter Theorymentioning

confidence: 99%

A Novel and Accurate Method for Designing Dielectric Resonator Filter

Saliminejad¹,

Fard²

2008

PIER B

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Abstract-The Development of numerical techniques enables us toanalyze a large number of complex structures such as dielectric resonator (DR) filters and planar passive elements for coplanar monolithic microwave integrated circuits.As for DR filters, numerical analysis of these structure is highly intricate mostly because of their non-homogenous composition (dielectric constant of DR is greater than 80, dielectric constant of the maintainer is less than 2 and dielectric constant of the atmosphere is 1). Hence, numerical analysis of such a structure, either in time domain (TLM, FDTD and . . . ) or frequency domain (FE, moment, mode matching, boundary element, FD and . . . ) is both complex and time-consuming. From one hand, the non-homogenous structure and from the other hand, the high frequency of applications, demand high density meshing in order to achieve accurate response [1][2][3].The explained method in this paper enables us to design a Chebyshev band passes filter by coaxially placing high-Q TM 01δ dielectric resonators in a cutoff circular waveguide. In the presented work, discussions are made regarding high-Q resonators and interresonator coupling. It can be used for TE and TM modes of dielectric resonators. The advantages of such a method are simplicity and accuracy. Furthermore, this method is very quick in calculating resonant frequencies of a single dielectric resonator and coupling factor between two dielectric resonators. Compared with HFSS software, the total required time in this method is less than 1 percent. 294 Saliminejad and GhafourifardBased on the presented method, a DR filter is designed, implemented and fabricated and the results are provided. The fabricated filter has an exclusive feature, i.e., it contains no screw for frequency tuning and it gives out the desired result without a need to modification.

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Novel Microstrip Hairpinline Narrowband Bandpass Filter Using via Ground Holes

Cited by 37 publications

References 23 publications

Compact Two-Layer Microstrip Bandpass Filters Using Broadside-Coupled Resonators

Compact Two-Layer Microstrip Bandpass Filters Using Broadside-Coupled Resonators

A Very Compact Novel Multi-Band BPF for Recent Mobile/Satellite Communication Systems

A Novel and Accurate Method for Designing Dielectric Resonator Filter

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