Antenna Sensor for Radio-wave-type Endoscope in Real Scale Mode

Authors have proposed an antenna sensor for radio-wave-type endoscope. The antenna sensor consists of one transmitting antenna and one receiving antenna. In authors’ previous research, a 2.5-times scale model of the proposed sensor was examined. In this paper, the proposed sensor is investigated by the simulation and measurement in real scale model. Microstrip antenna is used as antenna element. Phantoms of fat and blood vessel and antenna sensor are fabricated for the measurement. In both the simulation and the measurement, it is confirmed that a blood vessel of 4 mm diameter can be detected at a distance of 2 mm from the top surface of the fatty tissue. Moreover, the effectiveness of differential signal processing is shown as approach to achieve more reliable detection of blood vessel.