Results 241 to 250 of about 66,835 (307)

Thin 3-D Bandpass Frequency-Selective Structure Based on Folded Substrate for Conformal Radome Applications

IEEE Transactions on Antennas and Propagation, 2019
A new design method based on a folded substrate is proposed in this paper to reduce the thickness of 3-D bandpass frequency-selective structure (FSS). A 67% and 79% thickness reduction compared to the basic 3-D bandpass FSS is achieved by employing three-
A. Omar, Zhongxiang Shen
semanticscholar   +1 more source

Direct Synthesis of General Chebyshev Bandpass Filters in the Bandpass Domain

IEEE Transactions on Circuits and Systems I: Regular Papers, 2014
Conventional synthesis technique for general Chebyshev bandpass filters usually derives filtering polynomials from general Chebyshev filtering function. Then, lowpass prototypes or coupling matrices in the lowpass domain are derived and are transformed into the bandpass domain for practical application.
openaire   +1 more source

Multiple-Bandpass and Narrow-Bandpass Surface Waves Filters

1973 Ultrasonics Symposium, 1973
Surface-wave filters having bandwidths of less than 1 per cent have been investigated.on Y-2 lithium niobate. ST and YX quartz at 30 MHz. Filters with Q's up to 600 have been constructed on quartz showing good undis- torted passband characteristics.
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Analytic sampling of bandpass signals

Signal Processing, 1992
Abstract This paper investigates the simultaneous sampling of a bandpass signal and its Hilbert transform. A simultaneous sample of a bandpass signal and its Hilbert transform is equivalent to a complex sample of the analytic signal. Therefore, this type of sampling is called analytic sampling.
S. C. Scoular, William J. Fitzgerald 0001   +1 more
openaire   +2 more sources

Design, Fabrication, and Modulation of THz Bandpass Metamaterials

Laser & Photonics reviews, 2019
Development of terahertz (THz) sources, detectors, and optical components has been an active area of research across the globe. The interest in THz optoelectronics is driven by the various applications they have enabled, such as ultrawide‐band ...
Qinghua Wang, Bingtao Gao, Michaella E Raglione, Huixin Wang, Bao-jia Li, F. Toor, M. Arnold, Hongtao Ding   +7 more
semanticscholar   +1 more source

Compact bandpass Wilkinson power divider with harmonics suppression

, 2020
In this paper, a compact microstrip bandpass Wilkinson Power Divider (WPD) with 8th harmonic suppression is designed. In the designed structure, the quarter-wavelength transmission lines are replaced with a BPF to have a bandpass-shaped WPD and to obtain
H. S. Vaziri, S. Zarghami, F. Shama, A. Kazemi   +3 more
semanticscholar   +1 more source

Hybrid Spoof Surface Plasmon Polariton and Substrate Integrated Waveguide Broadband Bandpass Filter With Wide Out-of-Band Rejection

IEEE Microwave and Wireless Components Letters, 2018
This letter presents a novel hybrid spoof surface plasmon polariton (SSPP) and substrate integrated waveguide (SIW) filter, which has the broadband bandpass and wide out-of-band rejection features.
Peng Chen, Luping Li, Kai-Fu Yang, Qiang Chen   +3 more
semanticscholar   +1 more source

The Design of Multi-bandpass FSS

2015 IEEE 12th Intl Conf on Ubiquitous Intelligence and Computing and 2015 IEEE 12th Intl Conf on Autonomic and Trusted Computing and 2015 IEEE 15th Intl Conf on Scalable Computing and Communications and Its Associated Workshops (UIC-ATC-ScalCom), 2015
This article describes the features of basic frequency selective surfaces technology (FSS), presents the basic principle and essential method for design of double band pass and tri-band pass FSS, and the great performance was achieved by emulation and test results.
Huanqing Wang, Xin Sun, Wei He, Yuwei Wang, Yan Wang   +4 more
openaire   +1 more source

Bandpass grids with annular apertures

IEEE Transactions on Antennas and Propagation, 1987
A rigorous theory is developed for describing the diffraction of a plane wave by a doubly periodic array of annular apertures in a thick, perfectly conducting screen. Coaxial waveguide modes are used to describe the fields within each aperture, while the fields above and below the grid are written as plane wave expansions.
A. Roberts, R. C. McPhedran
openaire   +1 more source

Miniaturized-Element Bandpass FSS by Loading Capacitive Structures

IEEE Transactions on Antennas and Propagation, 2019
A bandpass frequency-selective surface (FSS) element loaded with capacitive structures is proposed to miniaturize FSS unit cell size. In the FSS design, the capacitive structure, implemented by convoluted slot grids (CSGs), is introduced to increase the ...
Peng-Chao Zhao, Z. Zong, Wen Wu, Bo Li, D. Fang   +4 more
semanticscholar   +1 more source