A novel compact ultra-wideband dual-notch microstrip antenna

摘要

This article presents the results of a novel and compact ultra-wideband dual-notch microstrip antenna excited using a coplanar waveguide feed. The antenna is comprised of two circular radiation patches with a rectangular slot to enhance its impedance bandwidth and two open-circuit stubs that generate high attenuation notches at the desired frequencies. The notch frequency can be controlled by changing the length of the stubs. The proposed antenna exhibits an impedance bandwidth of 123% from 2.45 to 10.3 GHz, significantly satisfying the Federal Communication Commission's ultra-wideband frequency range, while showing the band rejection performance in the frequency bands of 3.3 to 3.8 GHz and 5 to 5.9 GHz. The antenna was fabricated on a standard dielectric substrate, and its measured results are used to verify the simulated performance. The empirical results indicate that the proposed antenna is well suited to be integrated within various portable devices for ultra-wideband operation.