Results 241 to 250 of about 351,550 (291)

Broadband Oscillation Monitoring Using Interpolation FFT

2023 8th Asia Conference on Power and Electrical Engineering (ACPEE), 2023
Deyu Cai, Yongqi Li
exaly   +2 more sources

Detecting nonlinear oscillations in broadband signals

Chaos: An Interdisciplinary Journal of Nonlinear Science, 2009
A framework for detecting nonlinear oscillatory activity in broadband time series is presented. First, a narrow-band oscillatory mode is extracted from a broadband background. Second, it is tested whether the extracted mode is significantly different from linearly filtered noise, modeled as a linear stochastic process possibly passed through a static ...
Vejmelka, Martin, Palus, Milan
openaire   +2 more sources

Broadband RC chaotic oscillators

ICCSC'02. 1st IEEE International Conference on Circuits and Systems for Communications. Proceedings (IEEE Cat. No.02EX605), 2003
Recent investigations show that wireless communication systems are a very promising application area of chaotic dynamics. At the same time synthesis of chaotic oscillators suitable for IC implementation and producing chaotic oscillations in the specified frequency band is a problem.
E.V. Efremova, L.V. Kuzmin
openaire   +1 more source

Broadband YIG Tuned FET Oscillators

8th European Microwave Conference, 1978, 1978
The association of a Ga As Field Effect Transistors (FET) and a Single Crystal Ferrimagnetic Garnets (YIG) has brought about the realization of oscillators electronically tunable in very broad bands. This paper presents the theoretical conception and the first experimental results of two types of FET-YIG oscillators.
Y. Le Tron, S. Barvet, J. Obregon
openaire   +1 more source

GaAs Bipolar Broadband Oscillators

1991 21st European Microwave Conference, 1991
The GaAs heterojunction bipolar transistor (HBT) has been investigated for use in oscillators due to its combination of low flicker noise and high frequency performance. The HBT characteristics in oscillators have been assessed by constructing both varactor tuned oscillators (VTO) and, for the first time, YIG tuned oscillators (YTO).
P J Topham, A Dearn, G Parkinson
openaire   +1 more source

Broadband Negative Resistance Oscillator Circuits

1969 G-MTT International Microwave Symposium, 1969
Negative resistance oscillators can perform various functions other than just fixed frequency oscillations. For example, the electronic tuning effect is commonly used to generate FM signals and the injection locking phenomenon can be utilized for FM amplification, limiting and demodulation.
K. Kurokawa, J.P. Beccone, N.D. Kenyon
openaire   +1 more source

Study on broadband millimeter wave oscillators

[Conference Digest] International Conference on Millimeter Wave and Far-Infrared Technology: ICMWFT '90, 1989
In this paper, the calculation of external circuit impedances looking outside from the active device in a millimeter wave oscillator cavity, as well as the optimal design of the bias coaxial-line filter, have been studied. Based on the theoretical study, Ka-band oscillators have been developed.
Wei Hong, null Sifan Li
openaire   +1 more source

Broadband Chaotic Oscillations in a Weakly Coupled Ensemble of Self-Sustained Oscillators

Technical Physics Letters, 2019
An ensemble of van der Pol oscillators coupled in a ring has been numerically simulated. Peculiarities of chaotic dynamics have been studied by analysis of Fourier spectra and Lyapunov exponents. It is established that chaotic dynamics appearing upon the breakup of multifrequency tori is characterized by a broadband spectrum.
N. V. Stankevich, E. S. Popova, A. P. Kuznetsov, E. P. Seleznev   +3 more
openaire   +1 more source

A novel tunable optical oscillator for broadband signals

Optics & Laser Technology, 2012
Abstract A tunable optical oscillator that generates signals at the micro- to millimeter-wave band for wireless communication applications is suggested. It uses directly modulated semiconductor lasers, in which sideband modes and four-wave mixing (FWM) conjugate modes are injection locked by the simple control of the applied modulation power.
Ajung Kim, Y.K. Suh
openaire   +1 more source

High-frequency broadband transducers of ultrasonic oscillations

Acoustical Physics, 2009
The amplitude-frequency responses (AFRs) of ultrasonic oscillation transducers based on piezoelectric lithium iodate crystals of hexagonal modification and on magnetic soft ferrite powders are experimentally studied. The possibility to control the efficiency of magnetostriction powder transducers (MPTs) by variation in the value and orientation of the ...
V. M. Sarnatskii, A. I. Nedbai, V. V. Sarnatskii   +2 more
openaire   +1 more source