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

Moattari, Azita M.; Bijari, Abolfazl; Razavi, Seyyed Mohammad

doi:10.1002/mmce.22568

Cited by 10 publications

(7 citation statements)

References 39 publications

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“…In addition, the band‐to‐band suppression is considered, and S BB presents the suppression level between the passbands. To evaluate the performance of the proposed filter, a figure of merit (FoM) in both bands is defined as follows 5 :

{italicFoM}_{i} = 10 \log (\frac{10^{\frac{{italicRL}_{i} [dB]}{20}} \times {RoR}_{i} ([], \frac{dB}{GHz}) \times {BW}_{i} ([], GHz) \times f_{i} ([], GHz)}{10^{\frac{{italicIL}_{i} [dB]}{20}} \times Size ([], {mm}^{2})})

…”

Section: Simulation and Resultsmentioning

confidence: 99%

“…In recent years, modern microwave filters have played a vital role in developing radio frequency (RF) and microwave systems. [1][2][3][4][5][6] The rapid recent developments of wireless communications and widely using multi-band and multistandard systems make new challenges for RF front ends in the advanced transceivers. In the multi-band RF front end, compact microwave filters which operate at two (dual-band) or three (tri-band) frequency bands are required.…”

Section: Introductionmentioning

confidence: 99%

“…In recent years, modern microwave filters have played a vital role in developing radio frequency (RF) and microwave systems 1–6 . The rapid recent developments of wireless communications and widely using multi‐band and multi‐standard systems make new challenges for RF front ends in the advanced transceivers.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

A new compact, wide bandwidthdual‐passbandmicrostrip filter based ondual‐mode stepped‐impedance‐resonators

Moattari

Bijari

Razavi

2022

Int J RF Mic Comp-Aid Eng

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In this article, a new compact, wide bandwidth dual-band bandpass filter (DB-BPF) with four transmission zeros (TZs) is proposed. A dual-path configuration is realized by cascading different dual-mode resonators. The novel dualmode resonators are based on stepped impedance resonators (SIRs) that generate the TZs owing to their intrinsic characteristics. The proposed DB-BPF can fulfill simultaneous independent control of the external and internal-resonator coupling. The design procedure based on the cascaded dual-mode resonators and frequency transformation is also introduced. The surface current distributions are simulated to verify the performance of the proposed filter. The measured results show 2.14/4.33 GHz DB-BPF with 3-dB fractional bandwidth (FBW) of 0.27/0.15, respectively, which is suitable for WLAN applications. The return and insertion losses of the passband are better than 15/15-dB and less than 0.8/1.3-dB, respectively. The overall physical size of the fabricated DB-BPF is 20.4 mm Â 20.4 mm, equivalent to 0.23λ g Â 0.23λ g , where λ g is the guided wavelength at 2.14 GHz.The simulation results are in good agreement with the measurement results.

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{italicFoM}_{i} = 10 \log (\frac{10^{\frac{{italicRL}_{i} [dB]}{20}} \times {RoR}_{i} ([], \frac{dB}{GHz}) \times {BW}_{i} ([], GHz) \times f_{i} ([], GHz)}{10^{\frac{{italicIL}_{i} [dB]}{20}} \times Size ([], {mm}^{2})})

…”

Section: Simulation and Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

A new compact, wide bandwidthdual‐passbandmicrostrip filter based ondual‐mode stepped‐impedance‐resonators

Moattari

Bijari

Razavi

2022

Int J RF Mic Comp-Aid Eng

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“…Some of the most important objectives in the design of the resonator are low cost, easy fabrication, and miniaturization [44, 45]. Generally, microstrip resonators possess a light cost and compact structure in comparison with other resonators.…”

Section: Microstrip Resonator Designmentioning

confidence: 99%

A modified Jerusalem microstrip filter and its complementary for low phase noise X-band oscillator

Varcheh

Rezaei

Kiani

2023

Int. J. Microw. Wireless Technol.

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This article shows the design of two different low phase noise (LPN) planar X-band frequency oscillators using two various microstrip filters (MFs). These two MFs act as a frequency stabilization part in the loop of the microwave oscillator. The first one, the modified Jerusalem MF (MJ-MF), is based on the Jerusalem scheme. The second one, the complementary modified Jerusalem MF (CMJ-MF), is complementary of the MJ-MF. Finally, by employing the branchline coupler, the LPN MF oscillator is achieved. The MJ-MF (narrowband filter) LPN X-band oscillator operates at 8.17 GHz and denotes a phase noise (PN) of −161 dBc/Hz at 1-MHz frequency offset. The CMJ-MF (wideband filter) LPN X-band oscillator operates at 8.14 GHz and mentions a PN of −157 dBc/Hz at 1-MHz frequency offset.

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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%

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

Cited by 10 publications

References 39 publications

A new compact, wide bandwidthdual‐passbandmicrostrip filter based ondual‐mode stepped‐impedance‐resonators

A new compact, wide bandwidthdual‐passbandmicrostrip filter based ondual‐mode stepped‐impedance‐resonators

A modified Jerusalem microstrip filter and its complementary for low phase noise X-band oscillator

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

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