scholarly journals A Compact Multifrequency Measurement System Based on an Integrated Frequency-Scanning Generator

2020 ◽  
Vol 10 (23) ◽  
pp. 8571
Author(s):  
Nuannuan Shi ◽  
Tengfei Hao ◽  
Wei Li ◽  
Ming Li
Keyword(s):  
Measurement System ◽  
Measurement Errors ◽  
Microwave Frequency ◽  
Frequency Measurement ◽  
Measurement Range ◽  
Single Frequency ◽  
Laser Array ◽  
Large Bandwidth ◽  
Frequency Scanning ◽  
Mapping Technology

A compact multifrequency measurement system based on frequency-to-time mapping technology is proposed and experimentally demonstrated using an integrated frequency scanning signal generator. The relationship between the input microwave frequency and the time difference of a pair of pulses is established to realize the frequency information mapping to the time information. As a main part in the proposed frequency measurement system, the frequency-scanning signal is generated by heterodyning of two lasers with the monolithic integrated laser array, of which one is modulated on a saw-tooth signal. In the proposed frequency measurement system, it can measure single/multiple frequency microwave signals with a large bandwidth for high resolution and flexible tunable measurement range for multifrequency band. In the experimental demonstration, the single frequency measurement errors are less than 90 MHz within the measurement range from 4 to 12 GHz. For two-tone signal, the measurement resolution reaches about 150 MHz.

Photonic-assisted microwave frequency measurement system based on a silicon ORR

2017 ◽  
Vol 382 ◽  
pp. 366-370 ◽  
Author(s):  
Jianfei Jiang ◽  
Haifeng Shao ◽  
Xia Li ◽  
Yan Li ◽  
Tingge Dai ◽  
...  
Keyword(s):  
Measurement System ◽  
Microwave Frequency ◽  
Frequency Measurement

scholarly journals Photonic Remote Microwave Frequency Measurement With a Tunable Measurement Range Based on Dispersion Compensation Technology

2021 ◽  
Author(s):  
Qingqing Meng ◽  
Zihang Zhu ◽  
Tao Lin ◽  
He Li ◽  
Guodong Wang ◽  
...  
Keyword(s):  
High Frequency ◽  
Dispersion Compensation ◽  
Microwave Frequency ◽  
Frequency Measurement ◽  
Measurement Range ◽  
Processing Unit ◽  
High Frequency Range ◽  
Frequency Range ◽  
Bias Drift ◽  
The Impact

Abstract In this paper, a novel and efficient photonic-assisted remote frequency measurement (RFM) system with a significantly simplified structure and flexible operation range is proposed. By simply changing the dispersion coefficient or length of the dispersion medium in the central station (CS), the microwave frequency measurement range in the remote antenna unit (RAU) can be tuned. In this system, the RAU and the CS is separated to ensure the concealment and safety of the signal processing unit. The measurement range of the RFM system can be tuned easily during the measurement process without system reconstruction, and different RAUs located at different places can be controlled to work at the same measurement range. The simulation results show that a frequency measurement over the high frequency range (>18 GHz) can be achieved with a measurement error better than ±0.2 GHz. Noteworthy, the impact of the non-ideal factors such as bias drift, intensity noise, phase noise, the equivalent deviation of the polarization beam splitter (PBS), and the dispersion value of the single mode fiber (SMF) is also discussed. It has been proved that they have little influence on the system performance over the high frequency range.

scholarly journals Perancangan Perancangan Sistem Pengukuran Kapasitansi Crude Oil Menggunakan Interdigital Capasitors (IDCs) Berbasis Arduino Uno

2019 ◽  
Vol 3 (2) ◽  
pp. 54-61
Author(s):  
Risse Entikaria Rachmanita ◽  
Haerul Ahmadi
Keyword(s):  
Crude Oil ◽  
Measurement System ◽  
Measurement Errors ◽  
Frequency Measurement ◽  
Capacitance Measurement ◽  
Measuring Device ◽  
Heating Systems ◽  
Measurement Results ◽  
Arduino Uno ◽  
Linearity Test

Arduino UNO R3 is one of the cheapest and easiest microcontroller boards that has great potential to be used as a basis for the measurement system. This study aims to develop measurement system of crude oil capacitance by using IDCs(Interdigital Capacitors). By knowing the value of crude oil capacitance, the crude oil permittivity value can be calculated. The crude oil permittivity value data is extremely needed in making crude oil heating systems using microwaves. The study used IDC sprinted on a PCB board with a copper layer as the electrode. Then, the system measurement results were compared with the results of PM 6303 RCL meter Phillip type A frequency measurement of 1 kHz which was used as reference data to determine the extent of measurement errors. From the results obtained, it is known that the error value of the Arduino UNO R3 based capacitance repeatability measurement is 0.47%. While the results of the linearity test measurement of crude oil capacitance measurement of temperature increases using the Arduino Uno-based IDCs sensor, the R2 value is 0.87. Thus it can be seen that the Arduino UNO R3-based capacitance measuring device has quite good sensor characteristics.

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