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Wideband epidermal antenna for medical radiometry

Abstract: Microwave thermometry is a noninvasive and passive technique for measuring internal body temperature. Wearable compact antennas, matched to the specific body area, are required for this method. We present a new epidermal wideband antenna for medical radiometry. The double asymmetric H-shaped slot antenna was designed to be matched to different parts of the body without fat layers. The slots are fed by a short-circuited microstrip line in order to decrease size and back radiation, thus reducing potential interferences. In this way, contribution to radiometric temperature due to back radiation is lower than 4%, versus the 20% of the volume under investigation, over the whole operating frequency band. The designed prototype was manufactured on a flexible substrate. The antenna is a very small size, to make it comfortable and suitable for being used by patients with different body mass indexes. The double H-shaped antenna shows good wideband matching results from around 1.5 GHz up to 5 GHz, in different body locations such as the neck, foot instep and foot sole.

 Fuente: Sensors, 2020, 20(7), 1987

 Publisher: MDPI

 Publication date: 02/04/2020

 No. of pages: 10

 Publication type: Article

 DOI: 10.3390/s20071987

 ISSN: 1424-8220

 Spanish project: TEC2017-86619-R

Authorship

GERMAN LEON FERNANDEZ

LUIS FERNANDO HERRAN ONTAÑON

MATEOS MARTÍN, IGNACIO

RUIZ ALZOLA, JUAN