A Novel Printed Monopole UWB Filtenna Using Semi-Circles and Square Patch

This article’s objective is to introduce a new ultra-wideband filtenna for wireless communication systems. It consists of a UWB filter and antenna. The UWB filter is constructed using a rectangular multimode resonator with two identical triangular rings, open stubs, a rectangular defect ground structure (DGS), and a monopole radiating antenna designed with a square patch and two small semi-circles at the outer edges of the patch. The system is made more compact by the suggested antenna, which eliminates the need for an additional 50 Ω microstrip line to be cascaded between the designed antenna and filter sections. The filtenna is designed on a Rogers RO4003C substrate with a dielectric constant of 3.55 and a loss tangent of 0.001. The filtenna has a size of 30 × 55 mm
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and other characteristics such as average gain 3.07 dBi with peek gain of 4.93 dBi and efficiencies 99.6%. According to the simulation results, the impedance bandwidth is 6.72 GHz, and the fractional bandwidth is 109%.