Results 11 to 20 of about 19,862 (222)
High-gain erbium-doped fiber amplifier incorporating a double-pass amplification technique as a preamplifier [PDF]
, 2008 We present a high-gain erbium-doped fiber amplifier to be utilized as a preamplifier. A double-pass amplification technique is used in the first-stage amplifier together with a tunable bandpass filter.
Abdullah, Mohamad Khazani +2 more
core +1 more source
TTF: a flexible approach to narrowband imaging [PDF]
, 1997 The Taurus Tunable Filter (TTF) is a tunable narrowband interference filter covering wavelengths from 6300 A to the sensitivity drop-off of conventional CCDs (9600 A), although a blue `arm' (3700-6500 A) is to be added by the end of 1997.
Bland-Hawthorn, J., Jones, D. H.
core +3 more sources
All-Fiber Acousto-Optic Tunable Bandpass Filter Based on a Lateral Offset Fiber Splicing Structure
IEEE Photonics Journal, 2015 An all-fiber acousto-optic tunable bandpass filter has been proposed and experimentally demonstrated by fabricating a lateral offset fiber splicing structure between the lead-in single-mode fiber and acoustic fiber grating.
Hao Zhang +4 more
doaj +1 more source
IEEE Access, 2020 A semi-lumped reconfigurable on-chip bandpass filter with GaAs pHEMT technology is presented in this paper. Three order tunable bandpass filter is designed with serial lumped capacitors, parallel resonators, and reconfigurable components.
Hao-Ran Zhu +3 more
doaj +1 more source
Frequency-Tunable and Pattern Diversity Antennas for Cognitive Radio Applications
International Journal of Antennas and Propagation, 2014 Frequency-tunable microstrip antennas, for cognitive radio applications, are proposed herein. The approach is based on tuning the operating frequency of a bandpass filter that is incorporated into a wideband antenna.
A. H. Ramadan +4 more
doaj +1 more source
Tunable n-path notch filters for blocker suppression: modeling and verification [PDF]
, 2013 N-path switched-RC circuits can realize filters with very high linearity and compression point while they are tunable by a clock frequency. In this paper, both differential and single-ended N-path notch filters are modeled and analyzed.
Ghaffari, A. +2 more
core +2 more sources
Versatile Tunable Voltage-Mode Biquadratic Filter and Its Application in Quadrature Oscillator
Sensors, 2019 This paper presents a versatile tunable voltage-mode biquadratic filter with five inputs and three outputs. The proposed filter enjoys five single-ended output operational transconductance amplifiers (OTAs) and two grounded capacitors.
San-Fu Wang +3 more
doaj +1 more source
IEEE Access, 2020 This paper presents a miniaturized RF MEMS tunable bandpass filter design developed by application of folded ridged quarter-mode substrate integrated waveguide cavity.
Thomas R. Jones, Mojgan Daneshmand
doaj +1 more source
Angularly tunable bandpass filter: design, fabrication and characterization [PDF]
Optical Interference Coatings Conference (OIC) 2019, 2019 We present a thorough study of a bandpass filter for the near-infrared (IR) region, with bandwidth below 20 nm, high transmission, and a broad rejection band [350-1100] nm. This filter is angularly tunable between 0 and 50° and shows a shift of the central wavelength from 970 nm down to 880 nm, without major changes in its bandwidth and spectral shape ...
Lumeau, Julien +4 more
openaire +3 more sources
High Selectivity Dual-Band Bandpass Filter with Tunable Lower Passband
International Journal of Antennas and Propagation, 2015 This paper presents a novel method to design dual-band bandpass filters with tunable lower passband and fixed upper passband. It utilizes a trimode resonator with three controllable resonant modes. Discriminating coupling is used to suppress the unwanted
Wei-Qiang Pan +3 more
doaj +1 more source