Radiation of Dipole Antenna inside the Water with Time Gating Technique

Most of the biomedical images are studied with EM (electromagnetic) wave propagating to the tissues which is buried inside the higher dielectric material. In this paper, the dipole antenna is designed for studying the biomedical imaging of tissues which is buried inside the water. Due to the material of the dipole antenna was made from coaxial cable; therefore it has waterproof capability. The scattering parameters (S11, S12) and radiation patterns are measured by the frequency domain VNA (Vector Network Analyzer) and three dimensional microwave biomedical measurement system. The power attenuates largely when the EM wave radiation inside the water. Antenna impedance mismatches in different depths of water, however, by using time gating technique method obtains accurate measured results. The detail discussion of scattering parameters and radiation patterns inside the water will be described in the following section.