scholarly journals Wide-range, high-precision multiple microwave frequency measurement using a chip-based photonic Brillouin filter

Optica ◽  
2016 ◽  
Vol 3 (1) ◽  
pp. 30 ◽  
Author(s):  
Hengyun Jiang ◽  
David Marpaung ◽  
Mattia Pagani ◽  
Khu Vu ◽  
Duk-Yong Choi ◽  
...  
Keyword(s):  
High Precision ◽  
Microwave Frequency ◽  
Frequency Measurement ◽  
Wide Range

Photonic scanning receiver for wide-range microwave frequency measurement by photonic frequency octupling and in-phase and quadrature mixing

2020 ◽  
Vol 45 (19) ◽  
pp. 5381
Author(s):  
Jingzhan Shi ◽  
Fangzheng Zhang ◽  
Yuewen Zhou ◽  
Shilong Pan ◽  
Yiping Wang ◽  
...  
Keyword(s):  
Microwave Frequency ◽  
Frequency Measurement ◽  
Wide Range ◽  
Frequency Octupling

scholarly journals Aspects of modernization of UA Ч3-101 frequency meter

2020 ◽  
pp. 3-7
Author(s):  
I. I. Krival’ ◽  
A. I. Skripnyuk ◽  
A. V. Rudkovskiy ◽  
V. A. Protsenko ◽  
O. A. Prisyazhnyuk
Keyword(s):  
Frequency Converter ◽  
Reducing Power ◽  
Microwave Frequency ◽  
Frequency Measurement ◽  
Technical Solution ◽  
Reference Frequency ◽  
Similar Frequency ◽  
Wide Range ◽  
Frequency Meter ◽  
Labor Consuming

JSC «Meridian» n. a. S. P. Korolyov at one point developed and mass-produced a wide-range microwave frequency meter of the 8-mm wavelength range UA Ч3-101. Over time, however, the device has become obsolete for a number of reasons, and the question arose of the need to replace it. Since the cost of foreign models of frequency meters with similar parameters available on the market is quite high, the enterprise’s capabilities in solving this issue were considered. The analysis showed that the development of a new similar frequency meter will also be quite expensive, but the modernization of the existing one might be much cheaper, since the enterprise has all the infrastructure for serial production of the upgraded frequency meter. This article describes technical solutions for the replacement of labor-consuming microwave components of the UA Ч3-101 frequency meter, such as microstrip and waveguide input microwave converters, as well as optimization of the frequency measuring process of the input signal, which allowed us to upgrade the device according to the requirements. The use of the developed broadband small-sized frequency converter in the modernized UA Ч3-101A frequency meter made it possible to simplify the circuit and the frequency measurement process as much as possible, to use only one input microwave converter, to significantly reduce the weight and size of the device, to abandon the labor-consuming and expensive waveguide components of the device, and to double the sensitivity upgraded frequency meter. The proposed technical solution allowed simplifying the production process of the frequency meter, making the device more convenient to use. In addition, due to the optimization of circuit and design solutions in the upgraded frequency meter, it was possible to combine the counter and the gate driver on the same board, combine the reference frequency block with a 100 MHz tunable generator, abandon the switch, which allowed reducing power consumption and increasing the reliability of the device.

Instantaneous Microwave Frequency Measurement with Ultra-wide Range and High-resolution Based on Stimulated Brillouin Scattering

2017 ◽  
Vol 46 (12) ◽  
pp. 1226001
Author(s):  
潘林兵 PAN Lin-bing ◽  
姜凌珂 JIANG Ling-ke ◽  
王悦 WANG Yue ◽  
董玮 DONG Wei ◽  
张歆东 ZHANG Xin-dong ◽  
...  
Keyword(s):  
High Resolution ◽  
Brillouin Scattering ◽  
Stimulated Brillouin Scattering ◽  
Microwave Frequency ◽  
Frequency Measurement ◽  
Wide Range ◽  
Stimulated Brillouin

scholarly journals A High-Precision and Wideband Fundamental Frequency Measurement Method for Synchronous Sampling Used in the Power Analyzer

2021 ◽  
Vol 9 ◽  
Author(s):  
Yifan Wang ◽  
Kai Chen ◽  
Xuan Gou ◽  
Renjun He ◽  
Wenjian Zhou ◽  
...  
Keyword(s):  
Fourier Transform ◽  
Fundamental Frequency ◽  
High Precision ◽  
Frequency Measurement ◽  
Optimization Method ◽  
Measurement Range ◽  
Synchronous Sampling ◽  
Wide Range ◽  
High Measurement ◽  
Point Fast Fourier Transform

In the dedicated high-precision power quality analyzer, synchronous sampling is required to reduce the effect of spectrum leakage produced by the discrete Fourier transform process. Thus, accurate fundamental frequency measurement is urgently needed. However, due to the harmonics and noise in the power signal, it is difficult to achieve the accurate fundamental frequency measurement. Moreover, with the wide application of high-frequency programmable power supply, the fundamental frequency is gradually increasing, which requires power analyzers to have the abilities of both high precision and a wide range of the fundamental frequency measurement. To solve these issues, a new fundamental frequency measurement architecture used in synchronous sampling is proposed. This architecture consists of a small-point fast Fourier transform module, spectrum refinement algorithm, and a multimodal optimization method to calculate the accurate fundamental frequency under large harmonic conditions. In the practical hardware platform results, this architecture has a large fundamental frequency measurement range from 20 Hz to 200 kHz with a relative error which is <0.004%. The wideband fundamental frequency measurement structure proposed in this article achieves high measurement accuracy.

Wide-range, high-accuracy multiple microwave frequency measurement by frequency-to-phase-slope mapping

2020 ◽  
Vol 123 ◽  
pp. 105895
Author(s):  
Di Wang ◽  
Cong Du ◽  
Yuchen Yang ◽  
Weinan Zhou ◽  
Tong Meng ◽  
...  
Keyword(s):  
Microwave Frequency ◽  
Frequency Measurement ◽  
High Accuracy ◽  
Phase Slope ◽  
Wide Range

scholarly journals Separate Universe calibration of the dependence of halo bias on cosmic web anisotropy

2020 ◽  
Vol 499 (3) ◽  
pp. 4418-4431 ◽  
Author(s):  
Sujatha Ramakrishnan ◽  
Aseem Paranjape
Keyword(s):  
Dark Matter ◽  
High Precision ◽  
Gaussian Distribution ◽  
Initial Perturbation ◽  
Analytical Framework ◽  
Web Environment ◽  
Wide Range ◽  
Galaxy Assembly ◽  
Very High ◽  
Good Agreement

ABSTRACT We use the Separate Universe technique to calibrate the dependence of linear and quadratic halo bias b1 and b2 on the local cosmic web environment of dark matter haloes. We do this by measuring the response of halo abundances at fixed mass and cosmic web tidal anisotropy α to an infinite wavelength initial perturbation. We augment our measurements with an analytical framework developed in earlier work that exploits the near-lognormal shape of the distribution of α and results in very high precision calibrations. We present convenient fitting functions for the dependence of b1 and b2 on α over a wide range of halo mass for redshifts 0 ≤ z ≤ 1. Our calibration of b2(α) is the first demonstration to date of the dependence of non-linear bias on the local web environment. Motivated by previous results that showed that α is the primary indicator of halo assembly bias for a number of halo properties beyond halo mass, we then extend our analytical framework to accommodate the dependence of b1 and b2 on any such secondary property that has, or can be monotonically transformed to have, a Gaussian distribution. We demonstrate this technique for the specific case of halo concentration, finding good agreement with previous results. Our calibrations will be useful for a variety of halo model analyses focusing on galaxy assembly bias, as well as analytical forecasts of the potential for using α as a segregating variable in multitracer analyses.

scholarly journals Optical whispering-gallery mode barcodes for high-precision and wide-range temperature measurements

2021 ◽  
Vol 10 (1) ◽  
Author(s):  
Jie Liao ◽  
Lan Yang
Keyword(s):  
High Precision ◽  
Dynamic Range ◽  
Single Mode ◽  
Whispering Gallery Mode ◽  
Temperature Measurements ◽  
Laser Source ◽  
Multiple Modes ◽  
Whispering Gallery ◽  
Wide Range ◽  
Thermal Sensing

AbstractTemperature is one of the most fundamental physical properties to characterize various physical, chemical, and biological processes. Even a slight change in temperature could have an impact on the status or dynamics of a system. Thus, there is a great need for high-precision and large-dynamic-range temperature measurements. Conventional temperature sensors encounter difficulties in high-precision thermal sensing on the submicron scale. Recently, optical whispering-gallery mode (WGM) sensors have shown promise for many sensing applications, such as thermal sensing, magnetic detection, and biosensing. However, despite their superior sensitivity, the conventional sensing method for WGM resonators relies on tracking the changes in a single mode, which limits the dynamic range constrained by the laser source that has to be fine-tuned in a timely manner to follow the selected mode during the measurement. Moreover, we cannot derive the actual temperature from the spectrum directly but rather derive a relative temperature change. Here, we demonstrate an optical WGM barcode technique involving simultaneous monitoring of the patterns of multiple modes that can provide a direct temperature readout from the spectrum. The measurement relies on the patterns of multiple modes in the WGM spectrum instead of the changes of a particular mode. It can provide us with more information than the single-mode spectrum, such as the precise measurement of actual temperatures. Leveraging the high sensitivity of WGMs and eliminating the need to monitor particular modes, this work lays the foundation for developing a high-performance temperature sensor with not only superior sensitivity but also a broad dynamic range.

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