Design of sharp-rejection, compact, wideband bandstop filters

Mandal, Mrinal Kanti; Mondal, Priyanka

doi:10.1049/iet-map:20070212

Cited by 68 publications

(52 citation statements)

References 6 publications

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“…Based on the lossless transmission line models, when the TTLWEC are terminated the load impedance Z L as shown in Figure 2, the input impedance can be calculated as follows [19] …”

Section: Even-mode Analysismentioning

confidence: 99%

“…For obtaining excellent suppression performances and keeping the area as compact as possible, the values θ 1 = π and θ 2 = 2π at f 2 are chosen [19]. The electrical lengths at f 0 give (4) and (5), the input impedance at f 0 can be obtained as follows,…”

Section: Even-mode Analysismentioning

confidence: 99%

“…Based on the wideband bandstop filters demonstrated in [19], we propose a new configuration for designing WPD with harmonics suppression. The design equations of the proposed WPD are deduced based on the odd-and even-mode theory.…”

Section: Introductionmentioning

confidence: 99%

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A Modified Microstrip Wilkinson Power Divider With High Order Harmonics Suppression

Peng

Zhang²,

Leng³

et al. 2013

PIER C

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Abstract-In this paper, a modified Wilkinson power divider structure with three order harmonics suppression is presented. The quarter-wavelength microstrip lines in the traditional Wilkinson power divider (WPD) are replaced by two transmission line segments with ends connected (TTLWEC). The TTLWEC performs the functions of impedance transformation and three order harmonics suppression. The design equations are deduced by odd-and even-mode theory. An example of power divider operating at 1 GHz is designed and fabricated based on the printed circuit board technology. The measured results of 3.13 dB insert loss (IL) and 35 dB return loss (RL) are obtained at the operating frequency, and the first, second and third harmonic harmonics suppressions are −38 dB, −44 dB and −39 dB, respectively, which agree well with the simulated results and validate the availability of the proposed structure.

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“…Based on the lossless transmission line models, when the TTLWEC are terminated the load impedance Z L as shown in Figure 2, the input impedance can be calculated as follows [19] …”

Section: Even-mode Analysismentioning

confidence: 99%

Section: Even-mode Analysismentioning

confidence: 99%

See 1 more Smart Citation

A Modified Microstrip Wilkinson Power Divider With High Order Harmonics Suppression

Peng

Zhang²,

Leng³

et al. 2013

PIER C

View full text Add to dashboard Cite

show abstract

“…There exists variety of techniques to design microstrip BSFs. One of which is to employ shunt open-circuited resonators that are quarterwavelength long, which fits more to filter out narrowband signals [1]. However, other techniques, like the use of periodic structures, defected ground plane structure are more desirable for wideband communication systems [2]- [5].…”

Section: Introductionmentioning

confidence: 99%

Miniaturized Bandstop Filters Using Slotted-Complementary Resonators

Bait-Suwailam

2014

IJDIWC

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This paper presents a technique to miniaturize bandstop filters applicable for radiofrequency/microwave applications. The technique comprises the use of small resonant inclusions bridged with a slot, etched from the metallic ground plane underneath the filter's microstrip line segment. Unlike artificial magnetic materials, for instance split-ring resonators (SRRs) that respond to vertical magnetic field, complementary SRRs (CSRRs) resonate upon an excitation of an axial time-varying electric field. Numerical full-wave studies are presented here to validate and proof the proposed concepts. It is found that high miniaturization factors can be achieved for the filters loaded with the proposed slotted complementary resonators in comparison to nonslotted resonators. Furthermore, sensitivity analysis is conducted to study the effect of geometrical parameters of the proposed slotted resonators as well as the effect of the choice of host media on the suppression bandwidth and rejection level of such filters. Miniaturized bandstop filters based on developed slotted-complementary spiral resonators are also proposed and numerically evaluated.

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“…In [3], a filter is described that is based on a conventional prototype such as Butterworth or Chebyshev, and to which additional transmission zeros are introduced by coupling the input and output lines. The split impedance ring filter of [4] contributes two additional zeros, while [5] describes a split impedance ring with three additional stubs. The physical structure of the filter in [6] resembles that of a third order elliptic function filter.…”

mentioning

confidence: 99%

Double resonant stub bandstop filter with pseudo-elliptic response

Malherbe¹,

Reid²

2010

Electron. Lett.

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A simple wideband bandstop filter that yields equal ripples in both the pass and stop bands, is described. The filter comprises only of two resonant stubs and a connecting transmission line and has a transmission response almost identical to that of a third order elliptic function filter. The practical bandwidth is limited to 130-160%.Introduction: High rates of cutoff for wideband bandstop fitters are achieved if the filter prototype has a transfer function contributing transmission zeros at real frequencies away from the filter centre frequency, such as the elliptic function (Cauer) filters. The design procedures for transmission line filters employing elliptic function prototypes are widely described, and various forms of realization of such filters are available [1]. A number of authors have proposed and developed realizations of wideband bandstop filters that either realize true elliptic function responses, or pseudo-elliptic function responses by realizing additional transmission zeros at real frequencies.

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Design of sharp-rejection, compact, wideband bandstop filters

Cited by 68 publications

References 6 publications

A Modified Microstrip Wilkinson Power Divider With High Order Harmonics Suppression

A Modified Microstrip Wilkinson Power Divider With High Order Harmonics Suppression

Miniaturized Bandstop Filters Using Slotted-Complementary Resonators

Double resonant stub bandstop filter with pseudo-elliptic response

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