A study of Antenna System for Radio Wave Type Laparoscope

Abstract

In this paper, an antenna system for a radio wave type laparoscope is proposed. The antenna system consists of one transmitting antenna and four receiving antennas. The diameter of the practical laparoscope is usually 10mm and microwave in the frequency of 20GHz is used. In this study, however, a system with a 2.5-times scale model (a diameter of 25mm, the frequency of 8GHz) is investigated in order to facilitate of the measurement. In the analytical model, the antenna system is faced to fat. The differences between the transmission coefficients and reflection coefficient (in the frequency domain and the time domain ) in the cases with and without the blood vessel are observed.