Two Types of Trisection Bandpass Filters With Mixed Cross-Coupling

Захаров, А. В.; Rozenko, Sergii; Ilchenko, M. E.

doi:10.1109/lmwc.2018.2837905

Cited by 25 publications

(2 citation statements)

References 5 publications

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“…EM analysis is being used throughout the entire design cycle of microwave devices and systems, starting from topology development [1][2][3][4] through parametric studies [5], to the final refinement of circuit dimensions [6][7][8][9][10][11]. This is primarily because EM analysis is able to accurately account for various phenomena exerting significant effects on circuit responses, such as EM cross-coupling [12][13][14][15][16][17]. Furthermore, the incorporation of size reduction techniques of various kinds (e.g., use of the slow-wave phenomenon [18][19][20][21], transmission line folding [22,23], defected ground structures [24,25], or multi-layer realizations [26][27][28]) makes the topologies of microwave devices increasingly intricate.…”

Section: Introductionmentioning

confidence: 99%

Cost-Efficient Two-Level Modeling of Microwave Passives Using Feature-Based Surrogates and Domain Confinement

Pietrenko-Dabrowska,

Koziel,

Zhang

2023

Electronics

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A variety of surrogate modeling techniques has been utilized in high-frequency design over the last two decades. Yet, the curse of dimensionality still poses a serious challenge in setting up reliable design-ready surrogates of modern microwave components. The difficulty of the modeling task is only aggravated by nonlinearity of circuit responses. Consequently, constructing a practically usable surrogate model, valid across extended ranges of material, geometry, and operational parameters, is far from easy. As a matter of fact, conventional modeling techniques are merely capable of building models for microwave structures featuring a relatively small number of designable parameters within reduced ranges thereof. One possible way of mitigating these obstacles may be the employment of the recently proposed two-stage performance-driven modeling approach. Therein, the surrogate model domain is narrowed down to the section of the space where the vectors of adequate quality are located, thereby permitting significantly reducing the cost of acquiring the training data. Seeking even further cost reduction, this work introduces a novel modeling framework, which exploits problem-specific knowledge extracted from the circuit responses to achieve substantial cost-savings of training data acquisition. In our methodology, the modeling procedure targets response features instead of the complete responses. The response features are the characteristic locations of the circuit response, such as relevant minima or maxima over selected frequency bands. The dependency of the coordinates of the said features on circuit dimensions is considerably less nonlinear than is observed for the complete characteristics, which enables sizable reduction of the data acquisition cost. Numerical validation of our procedure involving three microwave structures corroborates its remarkable efficiency, which allows for setting design-ready surrogates using only a handful of samples.

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Section: Introductionmentioning

confidence: 99%

Cost-Efficient Two-Level Modeling of Microwave Passives Using Feature-Based Surrogates and Domain Confinement

Pietrenko-Dabrowska,

Koziel,

Zhang

2023

Electronics

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“…A new internal bypass metallic loop structure is proposed to introduce transmission-zeros below or above pass band by adjusting the length of this wire [6]. One mixed Cross-Coupling that is carried out in [7] allows to control the number of transmission-zeros. However, all these solutions are restricted with strength of cross coupling or coupling bandwidth between two cavities.…”

Section: Introductionmentioning

confidence: 99%

"A Novel Capacitive Cross - Coupling for Enhancement of Microwave Cavity Filter"

2022

JST: SSAD

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Normally, the microwave cavity filter is cast and gilded, which causes a fixed transmission zero point. Thus, the specifications of the filter cannot be turned during its operation. A novel enhancement capacitive cross-coupling structure is proposed to fabricate a microwave cavity filter with a turnable transmission zero point. This structure is implemented by adding a new tap screw to the center of the supporting Teflon piece of cross-coupling dumbbell resulted in an adjustable capacitor. The capacitive cross-coupling factor is achieved a greater value leading to an improved slope of the cavity filter. The simulation results show that cross-coupling bandwidth can be varied in the range from 35.4 MHz to 40 MHz by changing the screw length from 0 mm to 7 mm, respectively. To verify the efficiency of the novel design, this structure is used to fabricate a microwave cavity filter in eNodeB for Band 3 - Long Term Evolution (LTE) application. The filter is built up of 10 coaxial resonator cavities with two new capacitive cross-couplings. The simulation results of the filter fully meet specification requirements including a band of 1805 to 1880 MHz, return loss below -12.7 dB, passband ripple of 0.1 dB, and insertion loss below 0.2dB. For a bandwidth below 20 MHz, the signal rejection reduces 1 dB by changing the screw length from 0 mm to 6 mm. In addition to Band 3, this structure can be developed for different frequency bands.

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An inline pseudoelliptic self‐packaging substrate integrated suspended line filter with mixed electric and magnetic coupling

Xia

Xie

et al. 2020

Int J RF Microw Comput Aided Eng

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Two Types of Trisection Bandpass Filters With Mixed Cross-Coupling

Cited by 25 publications

References 5 publications

Cost-Efficient Two-Level Modeling of Microwave Passives Using Feature-Based Surrogates and Domain Confinement

Cost-Efficient Two-Level Modeling of Microwave Passives Using Feature-Based Surrogates and Domain Confinement

"A Novel Capacitive Cross - Coupling for Enhancement of Microwave Cavity Filter"

An inline pseudoelliptic self‐packaging substrate integrated suspended line filter with mixed electric and magnetic coupling

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