scholarly journals Microwave Magnetoelectric Devices

2012 ◽  
Vol 2012 ◽  
pp. 1-10 ◽  
Author(s):  
A. S. Tatarenko ◽  
M. I. Bichurin
Keyword(s):  
Phase Shift ◽  
Phase Shifter ◽  
Tuning Range ◽  
Frequency Region ◽  
Band Pass Filter ◽  
Maximum Phase ◽  
Pass Filter ◽  
Band Pass ◽  
Insertion Losses ◽  
Theory And Experiment

Tunable microwave magnetoelectric devices based on layered ferrite-ferroelectric structures are described. The theory and experiment for attenuator, band-pass filter and phase shifter are presented. Tunability of the ME devices characteristics can be executed by application of an electric field. This electric tuning is relatively fast and is not power-consuming. The attenuator insertion losses vary from 26 dB to 2 dB at frequency 7251 MHz. The tuning range of 25 MHz of band-pass filter at frequency 7360 MHz was obtained. A maximum phase shift of 30–40 degree at the frequency region 6–9 GHz was obtained.

scholarly journals DEVELOPMENT OF A REPEATER FOR A DEVICE FOR MONITORING CHANGES IN THE COMPOSITION OF THE AIR ENVIRONMENT

2021 ◽  
pp. 71-82
Author(s):  
I.B. Shirokov ◽  
◽  
P.A. Evdokimov ◽  
E.I. Shirokova ◽  
◽  
...  
Keyword(s):  
Phase Shifter ◽  
Experimental Studies ◽  
Band Pass Filter ◽  
Pass Filter ◽  
Measuring Device ◽  
Electronic Part ◽  
Microwave Amplifiers ◽  
Band Pass

This work is part of a project to create a device for monitoring changes in the composition of the air environment. The article describes the main elements of the repeater unit included in the measuring device. The results of modeling the developed band-pass filter, which is part of the waveguide path of the repeater, are presented. Experimental studies of the filter and circulator parameters are also carried out. The technical capabilities of the electronic part of the repeater unit, namely microwave amplifiers and a controlled phase shifter, are described.

scholarly journals Spatial Qualification Tests for Highly Selective Compact Micromachined Band Pass Planar Filters

2012 ◽  
Vol 2012 ◽  
pp. 1-4
Author(s):  
Raghida Hajj ◽  
Matthieu Chatras ◽  
Pierre Blondy ◽  
Olivier Vendier ◽  
Wolfgang Tschanum ◽  
...  
Keyword(s):  
Center Frequency ◽  
Band Pass Filter ◽  
Storage Test ◽  
Pass Filter ◽  
Small Influence ◽  
High Temperature Storage ◽  
Radiation Test ◽  
Band Pass ◽  
Insertion Losses ◽  
Temperature Storage

A highly selective planar band pass filter is proposed for satellite receivers to suppress intermodulation components. The 4-pole filter has a center frequency of 19.825 GHz with a bandwidth of 240 MHz. The measured quality factor is over 600 and the insertion losses are 4.1 dB. The micromachining technological process is used to fabricate this filter. A BCB (benzocyclobutene) thin layer is used as an electrical and mechanical support for the filter. The compatibility of the BCB with the spatial constraints was tested. Various tests were accomplished for this purpose and the results of all these tests are presented in the paper. The tests showed a very small influence of the temperature variation and high temperature storage test and practically no influence of the radiation test on the circuit.

Research on Processing Techniques of Logging-While-Drilling Signal Based on BPSK Continuous Wave

2011 ◽  
Vol 88-89 ◽  
pp. 688-694 ◽  
Author(s):  
Fang Yuan ◽  
Xian Feng Gong
Keyword(s):  
Horizontal Well ◽  
Continuous Wave ◽  
Filter Method ◽  
Band Pass Filter ◽  
Pass Filter ◽  
Difference Filter ◽  
Band Pass ◽  
Logging While Drilling ◽  
Processing Techniques ◽  
Theory And Experiment

The system of Logging-While-Drilling based on BPSK continuous wave is important for horizontal well prospecting. In this paper, the processing techniques of BPSK signal received on the ground have been studied. However, it is difficult to acquire the useful signals, since including most of reflective and mud pump noises. Based on the signal’s characteristic of sine, a new difference filter method, which is in the time field, is put forward. The method combines with the band-pass filter, which is in the frequency field, to reject the noises. Costas phase-locked loop technology and number control oscillator have been used in decoding technology, which can demodulate phase information and decode the BPSK signal. By the analyses in theory and experiment, the signal can be correctly decoded.

scholarly journals Estimation of Ferroelectric Material Properties and Phase-Shifter Design Key Parameters Influence on Its Figure of Merit for Optimization of Development Process

Crystals ◽  
2021 ◽  
Vol 11 (5) ◽  
pp. 538
Author(s):  
Alexander Gagarin ◽  
Roman Platonov ◽  
Tatiana Legkova ◽  
Andrey Altynnikov
Keyword(s):  
Material Properties ◽  
Figure Of Merit ◽  
Development Process ◽  
Phase Shifter ◽  
Ferroelectric Phase ◽  
Ferroelectric Material ◽  
Design Parameters ◽  
Band Pass Filter ◽  
Pass Filter ◽  
Band Pass

A model of the estimation of the ferroelectric-based phase-shifter figure of merit concerning the material properties and phase-shifter design parameters is presented. The influence of ferroelectric material tunability and losses on phase-shifter characteristics are analyzed. Two approaches to phase-shifter design (transmission line and band-pass filter) are considered. The review of the published results on the ferroelectric phase-shifter design was performed to approve the method proposed. Recommendations to optimize the phase-shifter development process are suggested on the basis of the elaborated model and analysis performed.

scholarly journals A Dual-Band Band-Pass Filter with Overlap Step-Impedance and Capacitively Loaded Hairpin Resonators for Wireless LAN Systems

2011 ◽  
Vol 2011 ◽  
pp. 1-9 ◽  
Author(s):  
P. Chomtong ◽  
C. Mahatthanajatuphat ◽  
P. Akkaraekthalin
Keyword(s):  
Fundamental Frequency ◽  
Wireless Lan ◽  
Cross Coupling ◽  
Dual Band ◽  
Band Pass Filter ◽  
Harmonic Frequency ◽  
Pass Filter ◽  
Band Pass ◽  
Insertion Losses ◽  
Better Than

This paper presents a dual-band band-pass filter using modified cross-coupled step-impedance and capacitively loaded hairpin resonators for WLAN systems. The proposed filter has been designed to operate at a fundamental frequency of 2.4 GHz and the first harmonics frequency of 5.2 GHz. The techniques of step impedance and load capacitor are combined in the design of the proposed filter. In particular, the techniques of modified cross-coupling and overlap resonators are applied to improve the response of insertion losses at the first harmonic frequency of 5.2 GHz. The simulated and experimental results of insertion losses and return losses are better than 3 dB and 20 dB, respectively, at the operating frequencies.

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