Characteristics of Curved Folded Bow-Tie Antenna with a Reflector

Abstract

Broadband and small antennas have been required for various applications, such as high speed data communication and subsurface radar and so on. Typical broadband antenna is a bowtie antenna, which can achieve the miniaturization of the antenna and the enhancement of the bandwidth by changing the antenna shape. In this report, conventional curved folded bowtie antennas and its bending structure are investigated. The effect of the reflector is examined in the impedance and radiation characteristics. As a result, the broadband characteristics can be maintained when the distance between antenna and reflector becomes 80 mm. In addition, the degradation of an antenna gain is confirmed at 1500 MHz.