Compact <scp>dual‐band</scp> bandpass filter with high‐passband isolation using coupled lines and open stub

Kishore, Simhadri; Arora, Ayan; Kumar, Kanaparthi V. Phani; Velidi, Vamsi Krishna; Nayak, Chittaranjan; Rao, T. Rama; Rajkumar, R.

doi:10.1002/mop.32940

“…With the rise of new wireless technologies [1][2][3][4][5], compact and low cost high-performance microwave filters are highly recommended. However, dual-band bandpass filters with some or all these characteristics are developed using several design techniques and technologies [6][7][8][9][10][11][12][13][14][15][16][17][18][19]. Based on microstrip technology [6][7][8][9][10][11], dual narrow-passband filters are investigated using parallel stepped impedance open stubs in [6] and grounded stepped impedance resonator in [7].…”

Section: Introductionmentioning

confidence: 99%

“…However, dual-band bandpass filters with some or all these characteristics are developed using several design techniques and technologies [6][7][8][9][10][11][12][13][14][15][16][17][18][19]. Based on microstrip technology [6][7][8][9][10][11], dual narrow-passband filters are investigated using parallel stepped impedance open stubs in [6] and grounded stepped impedance resonator in [7]. Also, a traditional open/short microstrip-stubs are configured to realize dual passband filter with wide bandwidth performance [8].…”

Section: Introductionmentioning

confidence: 99%

Double-Layered T-Shape Loaded Hairpin Resonator for High Performance Characteristic Dual-Band BPF Design

Mohammed,

Hammed

2023

Radioelectron.Commun.Syst.

0

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A simple high performance compact dual band bandpass filter is developed in this paper based on multilayered T-shape loaded hairpin resonator (T-SLHR). The filter circuit is constructed using two substrates. On the first ground plane substrate, two T-SLHRs are analyzed and electrically coupled through a space gap 𝑆 to accomplish the desired dual passbands. To acquire the filtering response, an input/output grounded hairpin-stub is patterned on a second ungrounded-substrate and broadside coupled to the T-SLHRs. To validate the proposed concept, a dual-band BPF is realized for a multi-wireless network system working at 2.4 GHz and 3.5 GHz center frequencies. Indeed, the T-SLHR is analyzed based on odd-even theory to generate the specified frequencies. Furthermore, a block-diagram to explain the coupling mechanism of the expected filtering attitude is suggested. Moreover, the simulated filter is manufactured and its results from measurement and simulation are compared and discussed. The produced filter has quite small area less than 126 mm 2 , high skirt roll-off selectivity and good isolation rejection band.

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“…With the rise of new wireless technologies [1][2][3][4][5], compact and low cost high-performance microwave filters are highly recommended. However, dual-band bandpass filters with some or all these characteristics are developed using several design techniques and technologies [6][7][8][9][10][11][12][13][14][15][16][17][18][19]. Based on microstrip technology [6][7][8][9][10][11], dual narrow-passband filters are investigated using parallel stepped impedance open stubs in [6] and grounded stepped impedance resonator in [7].…”

Section: Introductionmentioning

confidence: 99%

“…However, dual-band bandpass filters with some or all these characteristics are developed using several design techniques and technologies [6][7][8][9][10][11][12][13][14][15][16][17][18][19]. Based on microstrip technology [6][7][8][9][10][11], dual narrow-passband filters are investigated using parallel stepped impedance open stubs in [6] and grounded stepped impedance resonator in [7]. Also, a traditional open/short microstrip-stubs are configured to realize dual passband filter with wide bandwidth performance [8].…”

Section: Introductionmentioning

confidence: 99%

“…In the same fashion, a dual-wide-passband BPF is realized in [9] with pending capability using paper substrate. Following the even-odd method, [10] proposed an open stub loaded coupled lines to develop a multi-band BPF with passband isolation enhancement. In Addition, a parallel coupled stepped-impedance resonator is adopted in [11] to produce a high-selectivity DB bandpass filter.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Double-Layered T-Shape Loaded Hairpin Resonator for High Performance Characteristic Dual Band BPF Design

Mohammed

¹

,

Hammed

²

2022

Preprint

0

View full text Add to dashboard Cite

A simple high performance compact dual band bandpass filter is developed in this paper based on multilayered T-shape loaded hairpin resonator (T-SLHR). The filter circuit is constructed using two substrates. On the first ground plane substrate, two T-SLHRs are analyzed and electrically coupled through a space gap to accomplish the desired dual passbands. To acquire the filtering response, an input/output grounded hairpin-stub is patterned on a second ungrounded-substrate and broadside coupled to the T-SLHRs. To validate the proposed concept, a dual-band BPF is realized for a multi-wireless network system working at 2.4 GHz and 3.5 GHz center frequencies. Indeed, the T-SLHR is analyzed based on odd-even theory to generate the specified frequencies. Furthermore, a block-diagram to explain the coupling mechanism of the expected filtering attitude is suggested. Moreover, the simulated filter is manufactured and its results from measurement and simulation are compared and discussed. The produced filter has quite small area less than 126 mm 2 , high skirt roll-off selectivity and good isolation rejection band.

show abstract

A novel self‐packaged DBBPF with multiple TZs for 5G sub‐6 GHz applications

Zhang

¹

,

Ma

²

,

Zhang

³

et al. 2022

Micro & Optical Tech Letters

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In this article, we proposed a self‐packaged dual‐band bandpass filter (DBBPF) with high isolation and low insertion loss (IL) for 5G sub‐6 GHz applications. To get high stopband suppression, multiple and controllable transmission zeros (TZs) are introduced. A pair of quarter‐wavelength stepped‐impedance resonators (QSIRs) and half‐wavelength hairpin resonators (HWHR) are introduced to form a cross‐coupled five‐star topology to generate two passbands and multiple TZs analyzed by mixed electromagnetic couplings. A pair of U‐shape resonators are designed on G6 to fully excite the resonators and introduce source/load TZs at the same time. The generation of TZs by separate electric and magnetic coupling paths (SEMCP) is discussed. The DBBPF achieves a low IL of 0.85/1.13 dB with fractional bandwidths (FBW) of 11.0%/6.9% at center frequencies of 3.45 and 4.9 GHz for 5G sub‐6 GHz applications, respectively. The total size is only 0.32 λg × 0.45 λg.

show abstract

Compact dual‐band bandpass filter with high‐passband isolation using coupled lines and open stub

Cited by 8 publications

References 12 publications

Double-Layered T-Shape Loaded Hairpin Resonator for High Performance Characteristic Dual-Band BPF Design

Double-Layered T-Shape Loaded Hairpin Resonator for High Performance Characteristic Dual-Band BPF Design

Double-Layered T-Shape Loaded Hairpin Resonator for High Performance Characteristic Dual Band BPF Design

A novel self‐packaged DBBPF with multiple TZs for 5G sub‐6 GHz applications

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