A compact dual‐band bandstop filter using a circular, folded, symmetric, meandered‐line, stepped‐impedance resonator

Dhakal, Rajendra

doi:10.1002/mop.28579

Cited by 16 publications

(18 citation statements)

References 13 publications

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“…The Q ext of the WBBS filter is characterized by (4). The calculated Q ext for the proposed structure closely resembles the wideband bandstop filter and confirms the wideness of the response [15,16]. Thus, the exploration of Q ext helps in determining the characteristics of the WBBS filter.…”

Section: Optimization Of Capacitance and Derived Parameterssupporting

confidence: 66%

Miniaturized wideband bandstop filter using an air‐bridge capacitor via gallium‐arsenide based integrated passive device technology

Dhakal

2016

Micro & Optical Tech Letters

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the presence of the human sitting in his car. We locate the human models inside a car model as shown in Figure 13, and position it 25 cm from the left and 35 cm from the top of the car model. The SAR value within the human body when it exists in a car is listed in Table 4.This, in turn, leads us to conclude that the EM environment of the car has very little effect on the estimated SAR values. CONCLUSIONA new compact planar antenna design with the handset modeling that supports all of the operating mobile services, ISM applications, and wireless communication services is introduced. The use of the EBG structure miniaturizes the antenna size, widens the bands, and reduces the SAR values within the human body.The SAR values of the antenna satisfy the standard safety guidelines in free space, talking position, browsing mode, and when the human model in the car. The effect of the human body on the antenna performance was also taken into consideration. The antenna is tested in the recommended CTIA test position where good performances are noticed in the recommended four test cases. Thus, one can conclude that the antenna passes most of the possible tests that could face any mobile hand set antenna and hence it is considered suitable for commercial use. (2010) ABSTRACT: This letter reports a new implementation of miniaturized wideband bandstop (WBBS) filter using a gallium-arsenide (GaAs)-based integrated passive device technology (IPD). The implementation of an air-bridge capacitor explores the possibility of frequency selectivity from

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Section: Optimization Of Capacitance and Derived Parameterssupporting

confidence: 66%

Miniaturized wideband bandstop filter using an air‐bridge capacitor via gallium‐arsenide based integrated passive device technology

Dhakal

2016

Micro & Optical Tech Letters

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“…A general bandstop filter is formed by a transmission line loaded with one or multiple resonators. The loaded resonators are shunt-connected with the transmission line through tapped lines [2][3][4][5][6] or coupling lines [7][8][9][10]. For the transmission line, the loaded resonator forms the equivalent short-or open-circuited points at the resonant frequencies.…”

Section: Introductionmentioning

confidence: 99%

A Novel Quad-Band Bandstop Filter Based on Coupled-Line and Shorted Stub-Loaded Half-Wavelength Microstrip Resonator

Yan¹,

Cao²,

Zhou³

2018

PIER Letters

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This letter presents a novel quad-band bandstop filter. It is formed by loading a microstrip line with two special resonators. The special resonator can be seen as a coupled-line and shorted stubloaded half-wavelength microstrip resonator (CSSHMR). The resonator can resonate at four frequencies, which forms the corresponding equivalent shorted points at the microstrip line. Therefore, signals are rejected at these equivalent short-circuited points, which realizes the quad-band bandstop responses. The four resonant frequencies can be separately adjusted in a limited range. The gap coupling between the resonators can be introduced to adjust the performance. A transmission line model is built to analyze the quad-band bandstop filter. A prototype quad-band bandstop filter is designed, fabricated and measured. The measured and simulated results have a good agreement.

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“…The resonator property of DSIR is studied and compared with microstrip SIR. Besides, stepped-impedance resonators are utilized to realize the dual-band bandstop filter [3], and a meandered-line stepped-impedance resonator [4] is used in the design of dual-band bandstop filter. In [5], a bandpass filter with two transmission poles in passband using a single ring resonator is designed.…”

Section: Introductionmentioning

confidence: 99%

Design of Bandpass Filter with High Selectivity Using Stepped Impedance Resonator

Min¹,

Hou²,

Zhong³

et al. 2017

Proceedings of the 3rd International Conference on Wireless Communication and Sensor Networks (WCSN 2016)

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Abstract-In this paper, a novel bandpass filter (BPF) with high selectivity and great out-of band suppression is proposed by using stepped impedance resonators (SIR) and defected ground structure. The measured 3-dB bandwidth of the proposed BPF is 2.62-2.72GHz; the maximum simulated insertion loss is 0.4 dB within passband. Besides, there are four transmission zeros located at 2.12, 2.54, 2.84, and 3.80 GHz, the out-of band suppression is better than 20 dB, indicating that the proposed BPF has great suppression. Moreover, the measured and simulated filter characteristics are in agreement, which means that this design is effective. The characteristic of high selectivity is meaningful in wireless communication.

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A compact dual‐band bandstop filter using a circular, folded, symmetric, meandered‐line, stepped‐impedance resonator

Cited by 16 publications

References 13 publications

Miniaturized wideband bandstop filter using an air‐bridge capacitor via gallium‐arsenide based integrated passive device technology

Miniaturized wideband bandstop filter using an air‐bridge capacitor via gallium‐arsenide based integrated passive device technology

A Novel Quad-Band Bandstop Filter Based on Coupled-Line and Shorted Stub-Loaded Half-Wavelength Microstrip Resonator

Design of Bandpass Filter with High Selectivity Using Stepped Impedance Resonator

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