scholarly journals Латеральный спин-волновой транспорт в системе неидентичных магнонно-кристаллических микроволноводов

2021 ◽  
Vol 63 (9) ◽  
pp. 1330
Author(s):  
В.А. Губанов ◽  
С.Е. Шешукова ◽  
А.В. Садовников
Keyword(s):  
Signal Processing ◽  
Bragg Resonance ◽  
Brillouin Spectroscopy ◽  
Power Dividers ◽  
Frequency Selection ◽  
Waveguide Modes ◽  
Micromagnetic Modeling ◽  
Magnonic Crystals ◽  
Magnonic Crystal ◽  
Selection Of

The control regimes of dipole coupling in the lateral system of non-identical magnonic crystals are investigated by the method of Mandelstam-Brillouin spectroscopy and by the method of micromagnetic modeling. The modes of spatial and frequency selection of the spin-wave signal near the frequency of the band gap zone of the magnonic crystal are revealed. The influence of changes in geometric parameters on the properties of waveguide modes near the frequency of the Bragg resonance is investigated. The results obtained can be used to create microwave signal processing devices, such as demultiplexers, power dividers, couplers.

scholarly journals Simulation of an Adaptive Method of Improving the Accuracy and Extending the Range of Frequency Signal Processing in a Frequency-to-Code Converter

2021 ◽  
Vol 11 (21) ◽  
pp. 10341
Author(s):  
Piotr Warda
Keyword(s):  
Signal Processing ◽  
Adaptive Method ◽  
Variable Frequency ◽  
Frequency Change ◽  
Clock Signal ◽  
Frequency Signal ◽  
Frequency Selection ◽  
Processing Error ◽  
Simulation Results ◽  
Selection Of

The article discusses the modification of one of the basic methods of converting successive periods of a variable frequency signal into numerical values representing them. The method performs the adaptive frequency selection of the clock signal in the system processing the consecutive periods of input signal. The signal processing error is analyzed on an ongoing basis, and the frequency change factor is selected. Algorithms describing the operation of the method are included. The program of the simulator of the measurement channel operation with a frequency carrier of information is described, which allows for the verification of the proposed method. Examples of the simulation results are included.

Spatial–frequency selection of magnetostatic waves in a two-dimensional magnonic crystal lattice

JETP Letters ◽  
2016 ◽  
Vol 104 (8) ◽  
pp. 563-567 ◽  
Author(s):  
S. A. Odintsov ◽  
A. V. Sadovnikov ◽  
A. A. Grachev ◽  
E. N. Beginin ◽  
Yu. P. Sharaevskii ◽  
...  
Keyword(s):  
Spatial Frequency ◽  
Crystal Lattice ◽  
Two Dimensional ◽  
Frequency Selection ◽  
Magnetostatic Waves ◽  
Magnonic Crystal ◽  
Selection Of

Irreducible first Brillouin zone for two-dimensional magnonic crystals with asymmetric complex lattices

2021 ◽  
pp. 2150170
Author(s):  
Hui Yang ◽  
Guo-Hong Yun ◽  
Yong-Jun Cao
Keyword(s):  
Brillouin Zone ◽  
Unit Cell ◽  
Square Lattice ◽  
Two Dimensional ◽  
Area Formula ◽  
Irreducible Part ◽  
Full Band ◽  
Magnonic Crystals ◽  
Magnonic Crystal ◽  
Complex Basis

Two-dimensional (2D) magnonic crystal (MC) with an asymmetric complex basis is proposed in this paper, and its band structures are calculated in the whole area of the first Brillouin zone (BZ). This kind of MCs is composed of two different atoms in the unit cell, and the symmetry of the unit cell is broken due to changes in the position of the second atom, so the irreducible part of the BZ is no longer the small area [Formula: see text] for square lattice, and it must be expanded to the whole first BZ. Only by investigating the whole first BZ, can we get the true full band-gap for this kind of MCs.

A Skywave OTHR Adaptive Frequency Selection Method Based on Preliminary Criterion and Weighted Criterion

2014 ◽  
Vol 1061-1062 ◽  
pp. 974-977
Author(s):  
Shi Hua Liu ◽  
Xian Gang Liu ◽  
Zhi Jian Sun
Keyword(s):  
Selection Criterion ◽  
Selection Method ◽  
Frequency Selection ◽  
Selection Of

A skywave radar adaptive frequency selection method based on the preliminary criterion and the weighted criterion is presented. In this method, according to the various operational tasks, the frequency selection criterion is divided into the preliminary criterion and the weighted criterion based on the characteristic of the targets. The adaptive frequency selection of the skywave radar is achieved by the weighted computed of the frequency selection criterion. The feasibility and availability is demonstrated by an example.

Observations of Meteors using an over-the-horizon Radar

1989 ◽  
Vol 8 (1) ◽  
pp. 88-93 ◽  
Author(s):  
R. M. Thomas ◽  
D. J. Netherway
Keyword(s):  
Signal Processing ◽  
High Frequency ◽  
Meteor Shower ◽  
Upper Atmosphere ◽  
High Frequency Band ◽  
Meteor Detection ◽  
Signal Environment ◽  
Frequency Management ◽  
Sporadic Meteors ◽  
Selection Of

AbstractWhen metre wavelength radars were first operated in the 1940s, echoes were obtained which could be attributed to backscatter from ionised trains produced by the ablation of meteroids in the upper atmosphere at altitudes near 100 km. Modern over-the-horizon skywave radars operating in the HF (High Frequency) band employ digital techniques for both radar control and signal processing and are aided by frequency management subsystems for the selection of appropriate frequencies for meteor detection based on real-time monitoring of the HF signal environment.This paper describes the results of using such a radar for meteor observations. We report the detection of the Eta Aquarid meteor shower and demonstrate that a large increase in the echo rate due to sporadic meteors is obtained as frequencies are reduced below 15 MHz and the underdense echo ceiling rises in altitude. Finally, we present preliminary observations of highly Doppler shifted echoes which travel at meteoric velocities and which we identify as meteor ‘head echoes’.

The Dynamic Magnonic Crystal: New Horizons in Artificial Crystal Based Signal Processing

2012 ◽  
pp. 243-257 ◽  
Author(s):  
Andrii V. Chumak ◽  
Alexy D. Karenowska ◽  
Alexander A. Serga ◽  
Burkard Hillebrands
Keyword(s):  
Signal Processing ◽  
New Horizons ◽  
Magnonic Crystal
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