Design and Investigation of Polyamide Substrate Built Two‐Port Printed UWB Flexible Antenna With High Isolation and Triple Band Notched Features

In this communication, a UWB printed antenna over polyamide dielectric base is planned and examined. Three main features of the designed multi‐port radiator are: (i) the circular base, along with the notched ground, provides the UWB features (2.8–11.2 GHz) for the proposed antenna; (ii) the neutralization line and ring‐formed defects on the ground plane improve the separation level to above 25 dB within the entire ultra‐wide bandwidth; and (iii) two metallic rings located at the printed lines reject the three different frequency bands, i.e., 3.9–4.8, 5.8–6.4, and 7.3–8.2 GHz, respectively. Experimental testing of the designed aerial confirms its applicability in four different bands, i.e., 3.24–3.64, 4.92–5.09, 7.16–7.45, and 8.92–10.44 GHz, with a separation level around 25 dB. Stable gain/radiation features, along with diversity features, help the proposed design be suitable for UWB applications.