Results 161 to 170 of about 145,024 (206)

Zolotarev bandpass filters

IEEE Transactions on Microwave Theory and Techniques, 2001
Zolotarev rational functions may be used in certain bandpass filter applications for which two narrower passbands are required. Coupled-resonator low-pass prototypes for narrow bandpass filters based on even- and odd-degree Zolotarev functions are synthesized using a transformed variable.
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Narrow-Bandpass Waveguide Filters

IEEE Transactions on Microwave Theory and Techniques, 1972
A procedure is described whereby narrow-bandpass waveguide filters having ripple in both the passbands and stopbands can be synthesized in the form of coupled waveguide cavities. Orthogonal modes in square or circular waveguides are employed to enable negative coupling elements to be realized.
A.E. Atia, A.E. Williams
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Bandpass filtering with lowpass filters

Journal of the Franklin Institute, 1963
Abstract Lowpass filters may achieve the effects of bandpass filtering by heterodyning the bandpass wave to obtain the “in-phase” and “quadrature” components and filtering these with suitable lowpass filters. The impulse responses for the lowpass filters are determined in a simple way from the desired bandpass impulse response.
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Optimal Conjunctive Granulometric Bandpass Filters

Journal of Mathematical Imaging and Vision, 2001
zbMATH Open Web Interface contents unavailable due to conflicting licenses.
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Compact wideband bandpass filter

IEEE Microwave and Wireless Components Letters, 2006
Designing wideband bandpass filters (BPF) with parallel-coupled microstrip lines requires tight coupling resulting in close separation between the lines and difficulty of fabrication. Here, it is shown that the etched slots in the ground plane of the parallel coupled lines can significantly increase the coupling.
M.K. Mandal, S. Sanyal
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Bandpass filtering in BaTiO3

Annual Meeting Optical Society of America, 1988
White light images are used to perform real-time spatial filtering in BaTiO3 in two different geometries. White light images act as spatial filters by erasing certain frequency components of photorefractive Fourier transform holograms. As a result, these frequency components are suppressed in the reconstructed holographic images.
Lenore Pugliese, G. Michael Morris
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Voltage tunable bandpass filter

2015 Signal Processing Symposium (SPSympo), 2015
A voltage tunable bandpass filter is presented. The filter is realized in microstrip technology using two stepped-impedance resonators. The voltage tuning is provided by means of varactor diodes. The filter has fixed absolute bandwidth of 30 MHz in the frequency range from 375 MHz to 915 MHz. The insertion loss is lower than 5 dB and return loss better
Arkadiusz Golaszewski, Adam Abramowicz
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SWITCHABLE BANDPASS FILTER

2011
The invention relates to a switchable bandpass filter (3). In particular, the invention relates to a narrow-band bandpass filter (3) which can be switched over a broad frequency band and has two filter elements (22, 24) designed with microstrip line technology, which filter is suitable for use as a cosite filter in a compact design which is ...
ROHDE & SCHWARZ, SCHICK MICHAEL, KASTE NORBERT   +2 more
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Gradient Index Bandpass Filters

Optical Interference Coatings, 1992
The performance of filters having sinusoidal refractive index profiles have been published by various authors1. In general, these filters have a strong reflection at the design wavelength and offer the promise of no harmonics at any wavelength2. Further, these refractive index profiles may be superimposed with each other creating multiple stopbands ...
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Bandpass Filters for Communications

Optical Interference Coatings, 1995
There is considerable interest today for filters for fiber optics telecommunications are in the Near Infra-red spectral area. Activity is centered about 1550 nm. Components for Wavelength Division Multiplexer filters used with fiber amplifiers require very high transmission of certain selected wavelengths with very low transmission of an adjacent ...
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