A Trisection Filter Design With Negative Slope of Frequency-Dependent Crosscoupling Implemented in Substrate Integrated Waveguide (SIW)

Szydlowski, Lukasz; Jedrzejewski, A.; Mrozowski, Michał

doi:10.1109/lmwc.2013.2272611

Cited by 48 publications

(16 citation statements)

References 17 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…where Mf = (fmaxfmin)/∆f + 1 is the number of frequency points and Δf = 0.05 GHz is a frequency increment. The Fourier coefficients, an, that result in an optimum bandpass filtering response are found by minimizing (14). The genetic algorithm (GA) is used in this context for its applications in microwave and millimeter-wave front-ends design and optimizations [27]- [30].…”

Section: A Filter Design Without Matching Networkmentioning

confidence: 99%

See 1 more Smart Citation

Substrate Integrated Waveguide Bandpass Filtering With Fourier-Varying Via-Hole Walling

et al. 2020

View full text Add to dashboard Cite

In this paper, an optimization-driven methodology is proposed for the design of substrate integrated waveguide (SIW) bandpass filters (BPFs) with predefined passbands. The width between the metallic walls of via-holes is governed by a truncated Fourier series to achieve the desired filtering performance. The theory of rectangular waveguide is used to establish the optimization framework and obtain the series coefficients under predefined physical constraints. Two types of end-terminations are studied; specifically, with and without SIW-to-microstrip transitions. To validate the proposed methodology, two Ku-band BPF prototypes with 2.5% and 5.8% 15-dB fractional bandwidth (FBW) are designed, simulated, and measured. Furthermore, the half-mode SIW (HMSIW) concept is incorporated in one prototype to facilitate a miniaturized physical structure. Simulations and measurements are in close proximity with passband matching and transmission losses better than-15 dB and-2.5 dB, respectively. The proposed methodology allows for designing BPFs with predefined wideband or narrowband FBW by modifying the underlying physical constraints and optimization parameters. The resulting filters are planar, compact, and have wide stopband rejection. In addition, a derivation for the characteristic impedance of the SIW line is provided, which can be used to find the optimum SIW-to-microstrip transition without performing a parametric study. INDEX TERMS Bandpass filter (BPF), half-mode substrate integrated waveguide (HMSIW), SIW-tomicrostrip transition, narrowband, rectangular waveguide, substrate integrated waveguide (SIW), wideband.

show abstract

Section: A Filter Design Without Matching Networkmentioning

confidence: 99%

“…Nevertheless, the resulting physical area, high insertion losses and/or poor stopband rejection were major drawbacks. A trisection filter with a frequency-dependent cross-coupling was proposed in [14]. However, frequency matching was achieved at the expense of the stopband rejection level and passband insertion loss.…”

Section: Introductionmentioning

confidence: 99%

Substrate Integrated Waveguide Bandpass Filtering With Fourier-Varying Via-Hole Walling

et al. 2020

View full text Add to dashboard Cite

show abstract

“…Based on the strong dispersive coupling, some SIW filters are proposed and designed [14,15,[19][20][21][22]. In line SIW filters with quasi-elliptic response are analysed and designed using the concept of MEMC in main coupling paths in [15].…”

Section: Introductionmentioning

confidence: 99%

“…Using H-plane stub or Tjunction for strong dispersive coupling in main coupling paths, multiple FTZs are also achieved in [19]. When the strong dispersive coupling is realised in cross-coupling path, an additional FTZ can be achieved; and SIW filters in trisection and quadruplet schemes with frequency-dependent cross-coupling path are realised [14,20,21]. A SIW BPF with one frequency-dependent main coupling path in box-section scheme is proposed, and a four-pole generalised Chebyshev filtering function with two FTZs is implemented [22].…”

Section: Introductionmentioning

confidence: 99%

SIW bandpass filters in modified box‐section scheme with bypass/constant/frequency‐dependent coupling in diagonal cross‐coupling path

Liu¹,

Zhou²,

Zhang³

et al. 2019

IET Microwaves, Antennas & Propagation

View full text Add to dashboard Cite

Here, three fourth‐order bandpass filters (BPFs) in modified box‐section schemes using substrate integrated waveguide (SIW) are proposed and researched. The proposed filters are based on a conventional box‐section structure with considering bypass/constant/frequency‐dependent coupling (FDC) in the diagonal cross‐coupling path to construct new filtering responses. Based on the different type of the cross‐coupling path, the frequency response of each proposed structure is analysed and presented, which indicates that the proposed filters have flexible response in terms of finite transmission zeros (FTZs). The proposed filters can realise generalised Chebyshev responses with one/two/three FTZs at arbitrary positions. Moreover, one FTZ may be produced by using bypass coupling and direct inductive coupling window to improve lower stopband performance, which is verified by a coupling matrix. For the demonstration, three quasi‐elliptic response filters were designed, fabricated, and measured. Good agreement is achieved between simulated and measured results.

show abstract

“…Moreover, the structure formed by stub and two SIW cavity resonators generates new resonant frequency in the lower stopband to deteriorate the stopband response. Another method is to etch lines on the upper face of H-plane iris which can introduce the electric coupling, such as the shortended strip line [2], inter-digital slot-line (ISL) [9], meander line [10] and GCPW line [3,11]. The etched line has no increase in circuit size, but the filter exhibits a poor stopband response due to the spurious passband generated by the etched line resonator.…”

Section: Introductionmentioning

confidence: 99%

Compact in-line triplet SIW bandpass filter using etched GCPW line resonator

Ding

Tao

2016

IEICE Electron. Express

View full text Add to dashboard Cite

This paper presents a novel compact in-line triplet substrate integrated waveguide (SIW) bandpass filter. The filter is composed of two SIW cavity resonators and an etched one-half wavelength grounded coplanar waveguide (GCPW) line resonator. The GCPW line resonator is etched between two SIW cavity resonators to obtain more compact size. A transmission zero on the upper stopband is created by the cross coupling, which allows the filter implementation in in-line with sharp upper cut-off skirts. Finally, a compact third-order 15 dB return loss filter with a fractional bandwidth (FBW) of 7% at 5.5 GHz is designed, fabricated and measured. The experimental results show good agreement between the simulated and measured results. Keywords: etched GCPW line resonator, in-line, triplet, cross coupling, substrate integrated waveguide (SIW) Classification: Microwave and millimeter wave devices, circuits, and systems References

show abstract

A Trisection Filter Design With Negative Slope of Frequency-Dependent Crosscoupling Implemented in Substrate Integrated Waveguide (SIW)

Cited by 48 publications

References 17 publications

Substrate Integrated Waveguide Bandpass Filtering With Fourier-Varying Via-Hole Walling

Substrate Integrated Waveguide Bandpass Filtering With Fourier-Varying Via-Hole Walling

SIW bandpass filters in modified box‐section scheme with bypass/constant/frequency‐dependent coupling in diagonal cross‐coupling path

Compact in-line triplet SIW bandpass filter using etched GCPW line resonator

Contact Info

Product

Resources

About