Application of a Stub-Loaded Square Ring Resonator for Wideband Bandpass Filter Design

Zhang, Ping; Liu, Liqin; Chen, De-Li; Weng, Min‐Hang; Yang, Ru‐Yuan

doi:10.3390/electronics9010176

Cited by 20 publications

(12 citation statements)

References 18 publications

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“…Figure 7 shows the insertion loss variations (S21) as the values of W 1 , W 2 , W 3 , and W 4 are changed. Since a small value of W 1 could result in an increased inductance of the associated transmission line as well as a large value of W 2 and W 3 , the corresponded transmission zero will be decreased according to Equation (2), which is also proven by the simulation in Figure 7. Besides, a wide W 4 indicates an enhanced fringed capacitance, which further decreases the transmission zero frequency.…”

Section: Case Studies Of the Designed Bpfmentioning

confidence: 60%

“…There is an immense amount of research carried out to achieve TZs in a small area. The conventional method is to use transmission lines based resonators such as stub-loaded resonators [1,2] or stepped-impedance resonators [3][4][5] at the cost of large areas. In [6][7][8][9], the folded micro-strip lines are utilized, which bend the overall length in a small area to form the resonators.…”

Section: Introductionmentioning

confidence: 99%

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Design of a Ka-Band U-Shaped Bandpass Filter with 20-GHz Bandwidth in 0.13-μm BiCMOS Technology

2020

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In this work, the design of a novel Ka-band miniaturized bandpass filter with broad bandwidth is demonstrated by using inversely coupled U-shaped transmission lines. In the proposed filter, two transmission zeros can be generated within a cascaded U-shaped structure and it can also be proven that, by inversely coupling two stacked U-shaped transmission lines, the notch frequency at the upper stopband can be shifted to a lower frequency, which results in a smaller chip size. The key parameters affecting the performance of the proposed filter are investigated in detail with the effective lumped-element circuit illustrated. Fabricated in a 0.13-μm SiGe BiCMOS process, the proposed filter achieves an insertion loss of 3.6 dB at a frequency of 28.75 GHz and the measured bandwidth is from 20.75 GHz to 41 GHz. The return loss is better than −10 dB from 20.5 GHz to 39 GHz. The lower transmission zero is located at 11.75 GHz with a suppression of 54 dB while the upper transmission zero is around 67 GHz with an attenuation of 34.6 dB. The measurement agrees very well with the simulation results and the overall chip size of the proposed filter is 176 × 269 μm2.

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Section: Case Studies Of the Designed Bpfmentioning

confidence: 60%

Section: Introductionmentioning

confidence: 99%

Design of a Ka-Band U-Shaped Bandpass Filter with 20-GHz Bandwidth in 0.13-μm BiCMOS Technology

2020

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“…The proposed filter performance was compared with some related published works using Table 2. The comparison with [17,20,25] clearly shows that the proposed BPF is of compact size, with a good insertion loss. The minimum return loss is excellent at 25 dB.…”

mentioning

confidence: 91%

Circuit Modelling of Bandpass/Channel Filter with Microstrip Implementation

Nwajana

2020

IJEEI

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This paper presents a step-by-step approach to the design of bandpass/channel filters. A 3-pole Chebyshev bandpass filter (BPF) with centre frequency of 2.6 GHz, fractional bandwidth of 3%, passband ripple of 0.04321 dB and return loss of 20 dB has been designed, implemented, and simulated. The designed filter implementation is based on the Rogers RT/Duroid 6010LM substrate with a 10.7 dielectric constant and 1.27 mm thickness. The BPF was also fabricated using the same substrate material used for the design simulation. The circuit model and microstrip layout results of the BPF are presented and show good agreement. The microstrip layout simulation results show that a less than 1.8 dB minimum insertion loss and a greater than 25 dB in-band return loss were achieved. The overall device size of the BPF is 18.0 mm by 10.7 mm, which is equivalent to 0.16λg x 0.09λg, where λg is the guided wavelength of the 50 Ohm microstrip line at the filter centre frequency.

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“…The real challenge that the researchers now face is thus obtaining bandpass filters that are characterized by their excellent matching level, low insertion loss, small size, and ease of fabrication. For this, several research works have proposed techniques to reduce filter size while keeping good performances, such as open-loop ring resonators [3][4][5][6], parallel-coupled lines [7][8][9][10][11], stepped-impedance resonator (SIR) [12,13] and defected ground structure (DGS) [14][15][16][17].…”

Section: Introductionmentioning

confidence: 99%

Design of compact microstrip bandpass filter using square DMS slots for Wi-Fi and bluetooth applications

et al. 2021

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This paper presents the design of a compact bandpass filter based on two identical rectangular resonators and is implemented on microstrip technology for Wi-Fi and bluetoothapplications. To reduce the size of the filter, the defected microstrip structure (DMS) technique is proposed. This technique consists of etching slots in the rectangular resonator, which results in a change in the line properties and increase of the effective inductance and capacitance. This feature is used for miniaturization. The designed filter has a compact size (6.82x8.3) mm² with a low insertion loss of -0.1 dB and a good return loss of -36 dB. The simulation results are realized using the (computer simulation technology) CST Microwave software.

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Application of a Stub-Loaded Square Ring Resonator for Wideband Bandpass Filter Design

Cited by 20 publications

References 18 publications

Design of a Ka-Band U-Shaped Bandpass Filter with 20-GHz Bandwidth in 0.13-μm BiCMOS Technology

Design of a Ka-Band U-Shaped Bandpass Filter with 20-GHz Bandwidth in 0.13-μm BiCMOS Technology

Circuit Modelling of Bandpass/Channel Filter with Microstrip Implementation

Design of compact microstrip bandpass filter using square DMS slots for Wi-Fi and bluetooth applications

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