Title :
Vivaldi antenna with improved directivity for medical applications
Author :
Kowalewski, Jerzy ; Dey, Utpal ; Mahler, Tobias ; Zwick, Thomas
Author_Institution :
Inst. fur Hochfrequenztech. und Elektron. (IHE), Karlsruhe Inst. of Technol. (KIT), Karlsruhe, Germany
Abstract :
This paper presents a compact balanced antipodal Vivaldi antenna for medical microwave imaging applications. The antenna is supposed to operate in a matching liquid with a high dielectric permittivity. The proposed antenna covers the frequency range from 0.5 GHz to over 3 GHz. In the presented design, the substrate between the tapered radiating parts of the antenna is removed and as a result the matching liquid fills the resulting cavity. Thus higher directivity and narrower beam in the E-plane are obtained. The results of the simulation are verified with the measurement of the fabricated prototype.
Keywords :
UHF antennas; antenna radiation patterns; biomedical equipment; biomedical imaging; microwave imaging; wearable antennas; compact balanced antipodal Vivaldi antenna; fabricated prototype; frequency 0.5 GHz; high dielectric permittivity; medical applications; microwave imaging applications; tapered radiating parts; Antenna measurements; Antenna radiation patterns; Liquids; Microwave antennas; Microwave imaging; Substrates;
Conference_Titel :
Microwave Conference (GeMiC), 2015 German
Conference_Location :
Nuremberg
DOI :
10.1109/GEMIC.2015.7107768
