engleski

Ultra Wideband Antenna of Two Bow-tie Unipoles

In this paper novel ultra wideband (UWB) antenna designs suitable for ceiling-mount base station and small terminal applications are presented. Two different designs of antenna arrays employing two triangular radiators above a ground plane have been investigated. In the first design, triangular unipoles are settled parallel one to each other at the distance of a half wavelength at the 3 GHz. In the second design the same radiators are tilted to form a conical like structure. The in-phase excitation of the unipoles was performed by a section of the microstrip line which is centrally fed by a coaxial probe from the opposite side of the ground plane. The input impedance and radiation patterns of both antennas are simulated and measured. In the frequency range 0.8– 5 GHz the VSWR was less than 2.

antenna; wideband antenna; UWB; self-complementary antenna

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