An Extension of the Transmission Line Model for the Characterization of Microstrip-Microslot Applicator

In this paper, we present a new approach for the modelisation of the microstrip-microslot applicator used for biomedical applications. This device offers a lot of advantages for these applications but its modelisation is very complicated because of the various discontinuities on the microstrip lines and the coupling of the microslot with mediums of complex permittivity. Our usual models are improved by using the spectral domain approach in order to characterize the microstrip line with tuning septums, which constitutes the transmission line. The model used is based on the extension of the transmission line model of the radiating antennas. The validity of our approach is confirmed by comparison with experimental results.