Increasing the radiation efficiency and matching stability of in-body capsule antennas

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F49777513%3A23220%2F16%3A43928815" target="_blank" >RIV/49777513:23220/16:43928815 - isvavai.cz</a>

Výsledek na webu

<a href="http://ieeexplore.ieee.org/stamp/stamp.jsp?arnumber=7481314" target="_blank" >http://ieeexplore.ieee.org/stamp/stamp.jsp?arnumber=7481314</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1109/EuCAP.2016.7481314" target="_blank" >10.1109/EuCAP.2016.7481314</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Increasing the radiation efficiency and matching stability of in-body capsule antennas

Popis výsledku v původním jazyce

We propose an approach to increase the operating range and matching stability of in-body ingestible or implantable capsule antennas. It involves using high permittivity biocompatible superstrate on a high-Q narrowband microstrip antenna. In this way, the antenna–body coupling can be significantly reduced, resulting in improved detuning immunity, increased radiation efficiency, and reduced power absorption inside the body. To demonstrate the feasibility of the proposed approach, we designed a mid-ISM band (433 to 434.8) MHz low-profile (85 µm) conformal microstrip antenna loaded with high permittivity ceramic superstrate. We achieved a simulated gain of –20.4 dBi. The radiation efficiency reaches 0.6%, which exceeds the counterparts operating within the same band by at least 3.5 times. The bandwidth is 26 MHz (6%), while the antenna remains matched (S11 &lt; –10 dB) at 434 MHz within a wide range of tissue-equivalent phantoms. To validate the numerical results, we manufactured an antenna prototype and characterized it in terms of reflection coefficient S11.

Název v anglickém jazyce

Increasing the radiation efficiency and matching stability of in-body capsule antennas

Popis výsledku anglicky

We propose an approach to increase the operating range and matching stability of in-body ingestible or implantable capsule antennas. It involves using high permittivity biocompatible superstrate on a high-Q narrowband microstrip antenna. In this way, the antenna–body coupling can be significantly reduced, resulting in improved detuning immunity, increased radiation efficiency, and reduced power absorption inside the body. To demonstrate the feasibility of the proposed approach, we designed a mid-ISM band (433 to 434.8) MHz low-profile (85 µm) conformal microstrip antenna loaded with high permittivity ceramic superstrate. We achieved a simulated gain of –20.4 dBi. The radiation efficiency reaches 0.6%, which exceeds the counterparts operating within the same band by at least 3.5 times. The bandwidth is 26 MHz (6%), while the antenna remains matched (S11 &lt; –10 dB) at 434 MHz within a wide range of tissue-equivalent phantoms. To validate the numerical results, we manufactured an antenna prototype and characterized it in terms of reflection coefficient S11.

Druh

D - Stať ve sborníku

CEP obor

—

OECD FORD obor

20201 - Electrical and electronic engineering

Projekt

<a href="/cs/project/GAP102%2F11%2F0498" target="_blank" >GAP102/11/0498: Nové adaptivní monolitické metody vyšších řádů pro numerické řešení evolučních multifyzikálních problémů v elektrotechnice</a><br>

Návaznosti

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Rok uplatnění

2016

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název statě ve sborníku

10th European Conference on Antennas and Propagation (EuCAP 2016) : proceedings

ISBN

978-88-907018-6-3

ISSN

—

e-ISSN

neuvedeno

Počet stran výsledku

5

Strana od-do

1-5

Název nakladatele

IEEE

Místo vydání

Piscataway

Místo konání akce

Davos, Switzerland

Datum konání akce

10. 4. 2016

Typ akce podle státní příslušnosti

WRD - Celosvětová akce

Kód UT WoS článku

000400784900217