NDLI: High dynamic range microwave power sensor with thermopile and curled cantilever beam

Content Provider	IET Digital Library
Author	Yan, Jiabin Liao, Xiaoping Yi, Zhenxiang
Abstract	A high dynamic range microwave power sensor compatible with the gallium arsenide monolithic microwave integrated circuit process is presented. The power sensor consists of a thermoelectric power sensor and a capacitive power sensor for low and high power detection, respectively. To improve the dynamic range and optimise the impedance matching characteristic, the curled cantilever beam is utilised and the slot width of the coplanar waveguide transmission line is modified. The measured return loss is lower than –25.5 dB at 8–12 GHz. The output of the power sensor shows good linearity with the incident radio frequency power. For the incident power from 0.1 to 100 mW, the obtained sensitivities by a thermoelectric power sensor are about 0.0842, 0.0752 and 0.0701 mV/mW at 8, 10 and 12 GHz, respectively. For the incident power from 100 to 400 mW, the measured sensitivities by the capacitive power senor are about 0.0400, 0.0301 and 0.199 fF/mW at 8, 10 and 12 GHz, respectively.
Starting Page	1341
Ending Page	1343
Page Count	3
ISSN	00135194
Volume Number	51
e-ISSN	1350911X
Issue Number	Issue 17, Aug (2015)
Alternate Webpage(s)	https://digital-library.theiet.org/content/journals/el/51/17
Alternate Webpage(s)	https://digital-library.theiet.org/content/journals/10.1049/el.2015.1665
Journal	Electronics Letters
Publisher Date	2015-07-28
Access Restriction	Open
Rights Holder	© The Institution of Engineering and Technology
Subject Keyword	Cantilevers Capacitive Power Sensor Capacitive Sensor Curled Cantilever Beam Electrical Instruments And Technique Frequency 8 GHz to 12 GHz High Dynamic Range Microwave Power Sensor Microwave Detector Microwave Measurement Technique Monolithic Microwave Integrated Circuit Process Power 100 MW to 400 MW Sensing And Detecting Device Sensing Device And Transducers Thermal Instrument And Technique Thermal Variables Measurement Thermoelectric Power Sensor Thermopile Thermopiles
Content Type	Text
Resource Type	Article
Subject	Electrical and Electronic Engineering

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