Reliable and integrated technique for determining resonant frequency in radio frequency resonators. Application to a high-precision resonant cavity-based displacement sensor

2015 ◽  
Vol 86 (3) ◽  
pp. 034709 ◽  
Author(s):  
Rigoberto Jauregui ◽  
Estibaliz Asua ◽  
Joaquin Portilla ◽  
Victor Etxebarria
Keyword(s):  
Resonant Frequency ◽  
Radio Frequency ◽  
High Precision ◽  
Resonant Cavity ◽  
Displacement Sensor ◽  
Integrated Technique

High-precision time-grating displacement sensor based on harmonic wave correcting method

2005 ◽  
Author(s):  
Yang Wei ◽  
Donglin Peng ◽  
Xiaokang Liu ◽  
Xinghong Zhang
Keyword(s):  
High Precision ◽  
Harmonic Wave ◽  
Displacement Sensor ◽  
Precision Time

scholarly journals UWB fastly-tunable 0.5-50 GHz RF transmitter based on integrated photonics

2021 ◽  
Author(s):  
Fabio Falconi ◽  
Claudio Porzi ◽  
Filippo Scotti ◽  
Giovanni Serafino ◽  
Antonio Malacarne ◽  
...  
Keyword(s):  
Power Consumption ◽  
Radio Frequency ◽  
High Precision ◽  
Life Style ◽  
State Of The Art ◽  
Ultra Wideband ◽  
Robot Localization ◽  
Rf Transmitter ◽  
And Control ◽  
Large Tunability

Abstract In the last decade, the interest in software-defined ultra-wideband (UWB) and tunable radio frequency (RF) apparatuses with low size, weight, and power consumption (SWaP), has grown dramatically, pushed by the new 6G vision where, RF equipment shall enable a large number of fundamental applications as UWB communications, robot localization mapping and control and high precision radars, all of them contributing in revolutionizing our life style. Unfortunately, the coexistence of ultra-wideband and software-defined operation, tunability and low SWaP represents a big issue in the current RF technologies. In this article, to the best of our knowledge, the first example of a complete tunable software-defined RF transmitter with low footprint (i.e. on photonic chip) is presented exceeding the state-of-the-art for the extremely large tunability range of 0.5-50 GHz without any parallelization of narrower-band components and with fast tuning (<200micros). This first implementation, represents a breakthrough in microwave photonics.

A Fiber-Optic Displacement Sensor Based on High-Precision Differential Phase Measurement

2018 ◽  
Vol 36 (18) ◽  
pp. 4046-4050 ◽  
Author(s):  
Ke Chen ◽  
Min Guo ◽  
Yang Yang ◽  
Kang Liu ◽  
Wanjin Cai ◽  
...  
Keyword(s):  
High Precision ◽  
Fiber Optic ◽  
Phase Measurement ◽  
Displacement Sensor ◽  
Differential Phase

scholarly journals High precision machining of a displacement sensor for helicoidal motions

2021 ◽  
Author(s):  
Zeina ELRAWASHDEH ◽  
Philippe REVEL ◽  
Christine PRELLE ◽  
Frédéric LAMARQUE
Keyword(s):  
High Precision ◽  
Fiber Optic ◽  
Geometric Model ◽  
Translational Motion ◽  
Surface Characteristics ◽  
Measurement Range ◽  
Linear Displacement ◽  
Displacement Sensor ◽  
Fiber Optic Probes

Abstract This research study presents the design and the high precision manufacture procedure of a fiber-optic displacement sensor. It is composed of two fiber-optic probes associated with a structure of a cones’ grating. The sensor is characterized by its ability to measure the linear displacement for an axis performing a helicoidal motion. This motion has been demonstrated on a high precision lathe; where the spindle provided the rotational motion, associated to a translational motion on the linear stage. This allowed to obtain the two simultaneous motions. The displacement of the translational stage is measured by the sensor in real time.Firstly, a highly precise geometric model of the reflector part for the sensor was developed. This model provided a specific geometry for the cones-assembled grating, which has been precisely manufactured. The geometric parameters and the surface characteristics of each step in the fabricated grating were both identified in situ on the lathe. The agreement between simulation and experimental results is excellent. The performances of the fiber-optic displacement sensor were identified in-situ on the lathe. The analysis of the voltage output signals from the two fiber-optic probes is used to measure the grating displacement. The unbalanced rotation due to non-centered axes was also characterized. The sensor provided a micrometric resolution, on a measurement range of more than one centimeter.

Resonant frequency analysis of reentrant resonant cavity applicator by using FEM and FD-TD method

2000 ◽  
Vol 36 (4) ◽  
pp. 1750-1753 ◽  
Author(s):  
T. Kashiwa ◽  
M. Miyakawa ◽  
T. Tsukamoto ◽  
Y. Kanai
Keyword(s):  
Resonant Frequency ◽  
Frequency Analysis ◽  
Resonant Cavity

Design and Implementation of High Precision Online Thickness Gauge by Laser Displacement Sensor

2014 ◽  
Vol 568-570 ◽  
pp. 331-335
Author(s):  
Ping He ◽  
Meng Wang ◽  
Chao Liu ◽  
Ying Li
Keyword(s):  
High Precision ◽  
Steel Industry ◽  
High Reliability ◽  
Displacement Sensor ◽  
Laser Sensor ◽  
Thickness Gauge ◽  
Laser Displacement Sensor ◽  
Steel Rolling ◽  
X Ray ◽  
Ultrasonic Thickness

Steel rolling occupies a very important position in the iron and steel industry. The thickness of the steel plate is a crucial index of the quality, so the automatic detection system for high-precision thickness of the steel industry has a vital significance. The traditional thickness instruments have X-ray thickness gauge and ultrasonic thickness meter while the X-ray thickness gauge has radiation which is harmful to human body and ultrasonic thickness has a lower precision. For these shortcomings, a high precision thickness gauge by laser sensor was designed. Presented the differential measurement method based on laser displacement sensor. Then using TMS320F2812 as main control chip designed the hardware of the system. Finally, software programming was completed based on the hardware design. By experiment research, the results show that the laser thickness gauge has advantages of high precision and high reliability. It has a high practical value.

scholarly journals A Capacitively-Fed Inverted-F Antenna for Displacement Detection in Structural Health Monitoring

Sensors ◽  
2020 ◽  
Vol 20 (18) ◽  
pp. 5310
Author(s):  
Songtao Xue ◽  
Zhiquan Zheng ◽  
Shuai Guan ◽  
Liyu Xie ◽  
Guochun Wan ◽  
...  
Keyword(s):  
Numerical Simulation ◽  
Resonant Frequency ◽  
Current Distribution ◽  
Health Monitoring ◽  
High Frequency ◽  
Relative Displacement ◽  
Displacement Sensor ◽  
First Order ◽  
High Frequency Structure Simulator ◽  
Dimensional Parameters

This paper presents a capacitive displacement sensor based on a capacitively fed inverted-F antenna (CFIFA) for displacement detection. The sensor is composed of a grounded L-shape patch and a rectangular upper patch, forming a capacitor between them. The asymmetric dipole model is adopted to explain the frequency shift and current distribution of the proposed antenna sensor at its first-order resonance. The numerical simulation of the CFIFA using the Ansoft high-frequency structure simulator (HFSS) software is carried out to optimize the dimensional parameters, allowing the antenna to perform better. Two sets of CFIFAs are fabricated and tested for verification. Results show that the CFIFA has a good linear relationship between its first resonant frequency and the relative displacement, and is capable of a long range of displacement measuring.

scholarly journals Resonant-frequency discharge in a multi-cell radio frequency cavity

2014 ◽  
Vol 116 (17) ◽  
pp. 173301
Author(s):  
S. Popović ◽  
J. Upadhyay ◽  
J. Mammosser ◽  
M. Nikolić ◽  
L. Vušković
Keyword(s):  
Resonant Frequency ◽  
Radio Frequency
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