A Compact Wideband Dual-Polarized Antenna with Harmonic Suppression Using Nonuniform Defected Ground Structure

Abstract EN

A wideband dual-polarized coplanar waveguide (CPW) fed antenna integrating a wide stop-band filter is presented.

The designed filter is based on a nonuniform defected ground structure (DGS) in order to obtain a wide stop-band and a compact size.

This filter is used to reject harmonics and spurious radiation arising from the RF front end.

The complete structure (antenna and filter) has been optimized to have a compact size of 0.6 × 0.6 λ 0 2 ( λ 0 being the free-space wavelength at the lowest operating frequency).

The realized antenna operates in the frequency range between 2.7 GHz and 5.9 GHz (bandwidth of about 74%).

The isolation between feeding ports is more than 18 dB.

The complete structure has a wide stop-band characteristic (103%) for harmonic rejection.

The simulated numerical results have been confirmed with measurements.