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A 24-GHz Front-End Integrated on a Multilayer Cellulose-Based Substrate for Doppler Radar Sensors
- Source :
- Sensors; Volume 17; Issue 9; Pages: 2090, Sensors (Basel, Switzerland), Sensors, Vol 17, Iss 9, p 2090 (2017)
- Publication Year :
- 2017
- Publisher :
- MDPI AG, 2017.
-
Abstract
- This paper presents a miniaturized Doppler radar that can be used as a motion sensor for low-cost Internet of things (IoT) applications. For the first time, a radar front-end and its antenna are integrated on a multilayer cellulose-based substrate, built-up by alternating paper, glue and metal layers. The circuit exploits a distributed microstrip structure that is realized using a copper adhesive laminate, so as to obtain a low-loss conductor. The radar operates at 24 GHz and transmits 5 mW of power. The antenna has a gain of 7.4 dBi and features a half power beam-width of 48 degrees. The sensor, that is just the size of a stamp, is able to detect the movement of a walking person up to 10 m in distance, while a minimum speed of 50 mm/s up to 3 m is clearly measured. Beyond this specific result, the present paper demonstrates that the attractive features of cellulose, including ultra-low cost and eco-friendliness (i.e., recyclability and biodegradability), can even be exploited for the realization of future high-frequency hardware. This opens opens the door to the implementation on cellulose of devices and systems which make up the “sensing layer” at the base of the IoT ecosystem.
- Subjects :
- Engineering
Doppler radar
circuits on cellulose
0211 other engineering and technologies
flexible substrates
02 engineering and technology
Substrate (printing)
lcsh:Chemical technology
all-natural electronic
Biochemistry
Article
Microstrip
Analytical Chemistry
law.invention
Front and back ends
All-natural electronic
Circuits on cellulose
Doppler radar sensors
Flexible substrates
Green electronics
Internet of things (IoT)
Paper-based substrates
Substrate integrated circuits
Atomic and Molecular Physics, and Optics
Electrical and Electronic Engineering
law
Atomic and Molecular Physics
0202 electrical engineering, electronic engineering, information engineering
Electronic engineering
lcsh:TP1-1185
green electronics
paper-based substrates
substrate integrated circuits
Radar
Instrumentation
021101 geological & geomatics engineering
business.industry
Electrical engineering
020206 networking & telecommunications
Conductor
and Optics
Antenna (radio)
business
Realization (systems)
Subjects
Details
- ISSN :
- 14248220
- Volume :
- 17
- Database :
- OpenAIRE
- Journal :
- Sensors
- Accession number :
- edsair.doi.dedup.....0d1092a22a9bd335d3416b706e90ce5a