Monopole antennas for microwave catheter ablation

Author

Labonté, Sylvain ; Blais, Angeline ; Legault, Stéphane R. ; Ali, Hassan O. ; Roy, Langis

Author_Institution

Dept. of Electr. Eng., Ottawa Univ., Ont., Canada

Volume

44

Issue

10

fYear

1996

fDate

10/1/1996 12:00:00 AM

Firstpage

1832

Lastpage

1840

Abstract

We study the characteristics of various monopole antennas for microwave catheter ablation of the endocardium. The investigation is done with a computer model based on the finite-element method in the frequency domain. Three monopole geometries are considered: open-tip, dielectric-tip, and metal-tip. Calculations are made for the magnetic field, the reflection coefficient and the power deposition pattern of the antennas immersed in normal saline. The theoretical results are compared with measurements performed on prototypes and good agreement Is obtained. The antenna characteristics suggest that the metal-tip monopole best fulfils the requirements of catheter ablation. The computer model is then used to compare metal-tip monopoles of different dimensions and to determine design trade-offs

Keywords

antenna radiation patterns; cardiology; electromagnetic wave reflection; finite element analysis; frequency-domain analysis; hyperthermia; microwave antennas; microwave heating; monopole antennas; 2.45 GHz; antenna characteristics; computer model; design trade-offs; dielectric-tip; dimensions; endocardium; finite-element method; frequency domain; magnetic field; metal-tip; microwave catheter ablation; monopole antennas; monopole geometries; normal saline; open-tip; power deposition pattern; reflection coefficient; Antenna measurements; Catheters; Dielectrics; Finite element methods; Frequency domain analysis; Geometry; Magnetic field measurement; Microwave antennas; Reflection; Reflector antennas;

fLanguage

English

Journal_Title

Microwave Theory and Techniques, IEEE Transactions on

Publisher

ieee

ISSN

0018-9480

Type

jour

DOI

10.1109/22.539941

Filename

539941