Uncertainty analysis of intermodulation-based antenna measurements

Hannula, Jari-Matti; Viikari, Ville

doi:10.1109/eucap.2016.7481283

Cited by 1 publication

(3 citation statements)

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“…If the angle is larger than 19 mm, the sensor and the readout antenna are approximately uncoupled. In [19], Zierhofer and Hochmair investigated the lateral displacement against the coupling coefficient. We calculate V out from Figure 4.…”

Section: Sensor Rotating Modelmentioning

confidence: 99%

“…Sensor Geometrical and Fabrication. From [19], the working frequency of the sensor is closely related to the geometric size of the sensor. From the simulation, the number of coil turns has significant impact on the coil's own inductance and the sensor's quality factor.…”

Section: Sensor Rotating Modelmentioning

confidence: 99%

“…Nonetheless, the current leaks across the PN-junctions with exponential growth at high temperatures and the chips cannot function [18]. The angle of the antenna pair affects the antenna gain and uncertainty [19].…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Wireless Passive High‐Temperature Sensor Readout System for Rotational‐Speed Measurement

Hong

Jia

Guan³

et al. 2021

Journal of Sensors

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Rotational-speed measurement in harsh environments is an important topic. However, the high rotation results in rapid frequency variations in the signals of a sensor and changes in physical properties under extreme thermal circumstances cause significant difficulties in reading signals. To address this problem, we adopt wireless passive measurement methods to design a special characteristic signal circuit module that achieves precise measurement of rotational speed at high temperatures. The sensor and the readout system include a variable frequency source, a readout antenna, and a radio frequency demodulation circuit. Herein, a demodulation detector of the signal conversion circuit is designed and used in the envelope detection module of the single sideband demodulation method. In addition, a conversion circuit test platform for high-temperature environment sensor signal is developed. From the testing, the output signal demodulation of the sensor was observed under a maximum temperature of 700°C with error less than 0.12%. The new sensor and measurement method do not require physical leads and achieve wireless noncontact accurate measurement of rotational speed at high temperature.

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Section: Sensor Rotating Modelmentioning

confidence: 99%

Section: Sensor Rotating Modelmentioning

confidence: 99%