Analysis and optimisation of super-wideband monopole antenna with tri-band notch using a transmission line model

摘要

A study of monopole antenna for super-wideband applications is presented. A compact patch antenna is suggested to enhance the overall covered bandwidth (BW), where a major improvement of the BW obtained in the range 2.6-23 GHz (BW of 20.4 GHz). Also, by creating slots in the patch and in the feed line; three band-notches are created to reject different narrowband applications. The different antenna parameters are studied using a high-frequency structure simulator (HFSS). The measured data of the fabricated antenna shows good agreement with the simulated results with a slight shift at the lower and upper edges of the frequency range. A transmission line model of the proposed antenna is presented based on the effect of each element on the antenna behaviour. Advanced design system is used to construct and optimise the equivalent circuit model of the designed antenna. Results of the antenna behaviour obtained using the resistor-inductor-capacitor model compare favourably with the simulated results obtained using the HFSS both in the pass and rejection bands, with a small error at high frequencies.