Planar Wideband Differential-Mode Bandpass Filter With Common-Mode Noise Absorption

Zhang, Weiwei; Wu, Yongle; Liu, Yuanan; Chen, Yu; Hasan, Abul; Ghannouchi, Fadhel M.

doi:10.1109/lmwc.2017.2690839

Cited by 36 publications

(21 citation statements)

References 8 publications

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“…Hence, in the passband of this differential filter, both the transmission coefficient and reflection coefficient under the CM operation (i.e., S cc21 and S cc11 ) have low values. More specifically, as reported in [13], the measured |S cc11 | in the passband is about −25.38 dB, while the measured |S cc21 | in the passband is slightly lower than the |S cc11 |. Meanwhile, the measured insertion loss under the DM operation is as small as 0.29 dB.…”

Section: Balanced Bandpass Filters With Source-load-coupled Spurlinessupporting

confidence: 53%

“…As compared with the works reported in [11,13] and [15], the proposed one has similar insertion loss and the largest number of TZs, which means the proposed one exhibits better Table 1 summarizes the comparison between the proposed balanced filter and some similar reported works. As compared with the works reported in [11,13,15], the proposed one has similar insertion loss and the largest number of TZs, which means the proposed one exhibits better selectivity performance. Moreover, the proposed balanced filter has wider a stopband, with about 20 dB out-of-band rejection as well.…”

Section: Balanced Bandpass Filters With Source-load-coupled Spurlinesmentioning

confidence: 73%

“…For instance, compared with the balanced filter reported in [15], the proposed one achieves an electrical size reduction of approximately half. In addition, the differential filter reported in [13] is very unique since it utilizes lumped resistors in the filter to absorb CM noise. Hence, in the passband of this differential filter, both the transmission coefficient and reflection coefficient under the CM operation (i.e., S cc21 and S cc11 ) have low values.…”

Section: Balanced Bandpass Filters With Source-load-coupled Spurlinesmentioning

confidence: 99%

“…Here, it is essential to declare that the CMRR in this work is defined as usual, as CMRR = |S dd21 |/|S cc21 |. On the other hand, the matrix transformation method is employed to synthesize the balanced filter with common mode (CM) noise absorption, which seems to be an effective strategy [13]. On the other hand, selectivity and stopband performance of the synthesized filter are not good owing to its impedance-transformation-based structure.…”

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Transversely Compact Single-Ended and Balanced Bandpass Filters with Source–Load-Coupled Spurlines

Yan

Huang

et al. 2019

Electronics

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Multi-function wireless systems demand multi-channel transmit/receive (TR) modules, particularly as multiple functions are required to operate simultaneously. In each channel, passive components, including bandpass filters, must be compact, or at least transversely compact; thus, the entire circuitry of the channel will be slender, and consequently multiple channels can be parallel-arranged conveniently. In this work, single-ended and balanced bandpass filters for multi-channel applications are presented. As a unique resonator, the U-shaped stepped impedance resonator (USIR) can achieve size miniaturization compared with its corresponding uniform impedance resonator (UIR) counterpart. Hence, with the utilization of USIRs, the proposed bandpass filters are able to acquire compact transverse sizes. Moreover, by using the source-load coupling scheme, two transmission zeros (TZs) are respectively generated at the lower and upper sides of the passbands, which is useful for improvement of the selectivity performance. In addition, spurlines are introduced at the input and output ports to produce another TZ to further enhance the stopband performance, which cannot be acquired by the UIR or stepped impedance resonator (SIR). To verify the aforementioned idea, one single-ended and one balanced bandpass filter are implemented, with experimental results in good agreement with the corresponding simulations. Meanwhile, as compared with some similar works, the proposed balanced filter achieves compact transverse size, sharp selectivity skirt, and wide stopbands up to the fourth-order harmonic with suppression over 20 dB, which illustrates its suitability for differential signal transmission application in microwave circuits and systems.

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Section: Balanced Bandpass Filters With Source-load-coupled Spurlinessupporting

confidence: 53%

Section: Balanced Bandpass Filters With Source-load-coupled Spurlinesmentioning

confidence: 73%

Section: Balanced Bandpass Filters With Source-load-coupled Spurlinesmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Transversely Compact Single-Ended and Balanced Bandpass Filters with Source–Load-Coupled Spurlines

Yan

Huang

et al. 2019

Electronics

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show abstract

“…As shown in Figure 7, we presented a four-port broadband bandpass filter, the dimensions are L 1 = 18.86 mm, L 2 = 2.87 mm, L 3 = 0.82 mm, W 1 = 43.0 mm, W 2 = 1.72 mm, and W 3 = 16.5 mm. 22 The dielectric constant and thickness of the substrate are 3.48 and 0.762 mm, respectively. The cell dimensions of the problem space are Δx = 0.43 mm, Δy = 0.41 mm, and Δz = 0.254 mm.…”

Section: Simulation Of the Broadband Bandpass Filtermentioning

confidence: 99%

Applications of anisotropic one‐step leapfrog HIE‐FDTD method in microwave circuit and antenna

Zhang

Wang

et al. 2020

Int J RF Microw Comput Aided Eng

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To verify the effect of artificial anisotropy parameters in one‐step leapfrog hybrid implicit‐explicit finite‐difference time‐domain (FDTD) method, we calculated several microwave components with different characteristics. Introduced auxiliary field variable can reduce the program difficulty and improve the computational efficiency without additional computational time and memory cost. Analyses of the numerical results are proved that the calculation time is reduced to about one‐sixth compared to the traditional FDTD method for the same example simulated. The memory cost and relative error are remained at a good level. The numerical experiments for microwave circuit and antenna have been well demonstrated the method available.

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A highly selective balanced wideband bandpass filter based on nested split‐ring resonators

Wang

Wei

et al. 2019

Int J RF Microw Comput Aided Eng

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A balanced wideband bandpass filter (BPF) with a high frequency selectivity, controllable bandwidth, and good common‐mode (CM) suppression based on nested split‐ring resonators (SRRs) is proposed in this article. The proposed nested SRRs are applied to form three transmission poles (TPs) that can achieve a wide differential‐mode (DM) passband centered at 3.0 GHz. Meanwhile, two transmission zeros (TZs) are generated to realize a high frequency selectivity of the DM passband. Moreover, TPs and TZs can be quasi‐independently controlled by changing the physical lengths of SRRs and the gaps between them, which can greatly improve the flexibility and practicality of the design. The proposed balanced BPF is fed by balanced microstrip‐slotline (BMS) transition structures. For the CM signals, the BMS transition structures can achieve a good wideband CM suppression without affecting the DM ones, thereby simplifying the design procedure. In order to validate its practicability, a balanced wideband BPF is fabricated and a good agreement between the simulated and measured results is obtained.

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Planar Wideband Differential-Mode Bandpass Filter With Common-Mode Noise Absorption

Cited by 36 publications

References 8 publications

Transversely Compact Single-Ended and Balanced Bandpass Filters with Source–Load-Coupled Spurlines

Transversely Compact Single-Ended and Balanced Bandpass Filters with Source–Load-Coupled Spurlines

Applications of anisotropic one‐step leapfrog HIE‐FDTD method in microwave circuit and antenna

A highly selective balanced wideband bandpass filter based on nested split‐ring resonators

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