Compact LTCC dual‐band bandpass filter with high selectivity using the vertically S‐shaped short‐ended SIR

Chen, Jianxin; Ge, Yong; Tang, Hui; Zhou, Li‐Heng; Shi, Jin; Bao, Zhihua

doi:10.1002/mop.27539

Cited by 5 publications

(5 citation statements)

References 9 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…For example, Rothermel model is a fire propagation model based on the energy conservation law [35], and it is relatively universal and easy to be generalized. However, since it is a physical model based on the idealized conditions, there are massive difficulties in determining the factors and usefulness of the model in the context of power system alarming [36]. Another approach, namely McArthur model, could forecast fire weather and certain fire behavior parameters, which is helpful for firefighting deployment.…”

Section: A Simulation Of the Spatiotemporal Propagation Of Wildfiresmentioning

confidence: 99%

Integrating Wildfires Propagation Prediction Into Early Warning of Electrical Transmission Line Outages

Dian

Cheng

et al. 2019

IEEE Access

View full text Add to dashboard Cite

Wildfires could pose a significant danger to electrical transmission lines and cause considerable losses to the power grids and residents nearby. Previous studies of preventing wildfire damages to electrical transmission lines mostly analyze wildfire and power system security independently due to their differences in disciplines and cannot satisfy the requirement of the power grid for active and timely responses. In this paper, we have designed an integrated wildfire early warning system framework for power grids, taking prediction of wildfires and early warning of line outage probability together. First, the proposed model simulates the spatiotemporal process of wildfires via a geography cellular automata model and predicts when and where wildfires initially get into the security buffer of an electrical transmission line. It is developed in the context of electrical transmission line operating with various situations of topography, vegetation, wind and, especially, multiple ignition points. Second, we have proposed a line outage model (LOM), based on wildfire prediction and breakdown mechanisms of the air gap, to predict the breakdown probability varying with time and the most vulnerable poles at the holistic line scale. Finally, to illustrate the validation and rationality of our proposed system, a case study for a 500-kV transmission line near Miyi county, China, is presented, and the results under various wildfire situations are studied and compared. By integrating wildfire prediction into the LOM and alarming the holistic line breakdown probability along time, this paper makes a significant contribution in the early warning system to prevent transmission lines to be damaged by wildfires, illustrating the related breakdown mechanisms at the line operation level rather than laboratory experiments only. Meanwhile, the implementation of cellular automata model under comprehensive environmental conditions and simulation of the breakdown probability for the 500-kV transmission line could serve as references for other studies in the community. INDEX TERMS Cellular automata, electrical transmission lines, earning warning, wildfire.

show abstract

Section: A Simulation Of the Spatiotemporal Propagation Of Wildfiresmentioning

confidence: 99%

Integrating Wildfires Propagation Prediction Into Early Warning of Electrical Transmission Line Outages

Dian

Cheng

et al. 2019

IEEE Access

View full text Add to dashboard Cite

show abstract

“…To provide transmission zeros at outside of the second passband, the LC resonator 1 (TL03, C3) and 2 (TL04, C4) are implemented in the circuit symmetrically to introduce the transmission zero at the high side of the second passband [12,13]. The transmission zeros of resonator 1 and 2 are given by (7) f c 5 1 2p…”

Section: Circuit Of Dual-band Bandpass Filtermentioning

confidence: 99%

“…ffiffiffiffiffiffiffiffiffi ffi L c C c p (7) where f c is the frequency of transmission zero at out bands for the second passband. The frequencies for rejection zeros are designed based on the layout of TL03, C3, TL04, and C4.…”

Section: Circuit Of Dual-band Bandpass Filtermentioning

confidence: 99%

See 1 more Smart Citation

A compact multilayer dual‐band bandpass filter using shunt architecture by ltcc process for global WLAN applications

Chen

Lin

2016

Micro & Optical Tech Letters

View full text Add to dashboard Cite

This investigation proposes a compact multilayer dualband bandpass filter design with shunt architecture. The proposed dualband filter has dual passband to meet the requirement of different operating frequencies. The first (I) and second (II) passbands with small insertion loss have bandwidths of around 380 and 1350 MHz to cover all IEEE 802.11 bands in different regions of the world. This dual-band filter has multiple transmission zeros to provide high rejection level as well. The presented filter was fabricated by technology of low temperature co-fired ceramic (LTCC), resulting in a miniaturized dimension of only 2.5 mm (L) 3 2.0 mm (W) 3 0.7 mm (H). Finally, the measured results are in a good agreement with the simulated ones.

show abstract

“…Many reported planar switchable BPFs were realized by using the printed circuit board technology, but suffered from large circuit area. Recently, the technology of low‐temperature cofired ceramic (LTCC) has been widely utilized for size reduction because of its three‐dimensional (3D) circuit layout . However, very little research on LTCC reconfigurable circuit has been done so far .…”

Section: Introductionmentioning

confidence: 99%

Novel LTCC switchable bandpass filter using vertically short-ended sir

Tang

Chen

et al. 2014

Microw. Opt. Technol. Lett.

Self Cite

View full text Add to dashboard Cite

A novel compact low‐temperature cofired ceramic (LTCC) centrally loaded short‐ended stepped‐impedance resonator (SIR) is constructed in three‐dimensional (3D) environment and investigated to design a switchable bandpass filter (BPF). The size of the proposed SIR can be miniaturized greatly, because it is vertically folded in LTCC. The switchable passband of the BPF can be achieved by mounting PIN diodes on the surface of LTCC substrate. The simulated and measured results of the demonstration compact BPF are presented and show good switchable passband performance. © 2014 Wiley Periodicals, Inc. Microwave Opt Technol Lett 56:999–1002, 2014

show abstract

Compact LTCC dual‐band bandpass filter with high selectivity using the vertically S‐shaped short‐ended SIR

Cited by 5 publications

References 9 publications

Integrating Wildfires Propagation Prediction Into Early Warning of Electrical Transmission Line Outages

Integrating Wildfires Propagation Prediction Into Early Warning of Electrical Transmission Line Outages

A compact multilayer dual‐band bandpass filter using shunt architecture by ltcc process for global WLAN applications

Novel LTCC switchable bandpass filter using vertically short-ended sir

Contact Info

Product

Resources

About