Antenna-in-Package Design and Robust Test for the Link Between Wireless Ingestible Capsule and Smart Phone

An antenna-in-package is proposed for a wireless ingestible capsule operated at ISM (2.4-2.48 GHz) band and also experimentally tested in a system level. The proposed antenna is designed for data transmission between the ingestible capsule and a smart phone using Bluetooth. A modified planar inverte...

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Bibliographic Details
Published inIEEE access Vol. 7; pp. 35231 - 35241
Main Authors Chu, Hui, Wang, Pei-Juan, Zhu, Xiao-Hua, Hong, Hong
Format Journal Article
LanguageEnglish
Published Piscataway IEEE 2019
The Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subjects
Antenna design
Antenna-in-package
Antennas
Bluetooth
Data transmission
Design modifications
Design optimization
frequency tuning
ingestible capsule
Muscles
Organs
Polarization
polarization diversity
Pork
Smart phones
Smartphones
Substrates
Temperature measurement
Temperature sensors
Torso
Transmitting antennas
Wireless communication
Wireless sensor networks
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Summary:An antenna-in-package is proposed for a wireless ingestible capsule operated at ISM (2.4-2.48 GHz) band and also experimentally tested in a system level. The proposed antenna is designed for data transmission between the ingestible capsule and a smart phone using Bluetooth. A modified planar inverted-F structure is proposed for the antenna design, whose end section is bent to be vertical with respect to the substrate, mainly for the considerations of frequency tuning, size reduction, and polarization diversity. First, a one-layer cube muscle phantom model is used for initial design and optimization. Then, a comprehensive evaluation method, with considerations of the polarization mismatch loss, is proposed to analyze the radiation performance using a CST human body model. The evaluated results indicate that the proposed design can ensure enough margins for the link budget despite the relative position between the capsule and the smart phone. In addition to the advantages stated above, the proposed antenna is not sensitive to different digestive organs. Reflection measurement is presented using a muscle-mimicking phantom. Radiation characteristics are presented using a simple human torso model filled with pork by measuring the received power in a system. Successful data transmission, between a transmitter using the proposed antenna and a receiver using a smart phone, is performed in a temperature monitoring system.
ISSN:2169-3536
2169-3536
DOI:10.1109/ACCESS.2019.2891880