English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Global: Zendy Plus annual

Presents the access of premium content as premium feature

Premium Content

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Global: Zendy Tools annual

Global: Zendy Free Plan

Global: Zendy Tools monthly

Global: Zendy Plus monthly

This paper presents a compact K-band Doppler radar sensor for human vital signal detection that uses a radar configuration with only single coupler. The proposed radar front-end configuration can reduce the chip size and the additional RF power loss. The radar front-end IC is composed of a Lange coupler, VCO, and single balanced mixer. The oscillation frequency of the VCO is from 27.3 to 27.8 GHz. The phase noise of the VCO is ?91.2 dBc/Hz at a 1 MHz offset frequency, and the output power is ?4.8 dBm. The conversion gain of the mixer is about 11 dB. The chip size is 0.89×1.47 ㎟. The compact Ka-band Doppler radar system was developed in order to demonstrate remote human vital signal detection. The radar system consists of a Ka-band Doppler radar module with a 2×2 patch array antenna, baseband signal conditioning block, DAQ system, and signal processing program. The front-end module size is 2.5×2.5 ㎠. The proposed radar sensor can properly capture a human heartbeat and respiration rate at the distance of 50 cm.

A Compact Ka-Band Doppler Radar Sensor for Remote Human Vital Signal Detection