Abstract:
This paper focuses to design a compact (110mm³)
Ultra-Wide Band (UWB) (3.1GHz to 10.6GHz) antenna,
which covers almost the whole 10dB impedance matching
bandwidth of the UWB range. Two of the main specialties of
this article over other related articles are its antenna’s wider
bandwidth (approx. 7.3GHz) and antenna’s simulation
environment. No other papers consider such a realistic
model to simulate their antenna, before. Due to its wider
bandwidth, this antenna can be employed in the Wireless
Capsule Endoscopy (WCE) system, which mainly requires a
high-speed real-time data transfer-capable antenna. The
antenna was examined inside simplified human
Gastrointestinal (GI) tract phantoms (Colon, Esophagus,
Small Intestine and Stomach) as well as the human Voxel GI
tract model by maintaining proper tissue properties for the
sake of accurate parametric results. Biocompatible material
polyimide was used to construct the capsule wall to fulfill
the system’s biocompatibility. In the result analysis part, the
proposed antenna’s SAR (Specific Absorption Rate) or
electromagnetic energy amount, consumed by near-side
body tissue was considered and found in the acceptable
region, according to Federal Communication Commission
(FCC)’s regulation. Also, other crucial antenna parameters
such as VSWR, reflection coefficient, radiation
characteristics, efficiencies, directivity and surface current
density were adoptable compare to other related articles.
The Finite Integration Technique (FIT) of CST Microwave
Studio Suite 2020 was used to investigate the antenna
parameters.
