An Element of Wide-band and Wide-scan Phased Array Antenna

This paper introduces a Vivaldi-type wide-band and wide-scan all-metal phased array antenna. By using multi-segment feeding structure derived from binomial matching transformer, together with absorbing material impedance loading technology, the bandwidth extends towards low frequency and wide-scan properties is realized. In this paper, theory and design methodology are formulated, and followed by a concise set of design guidelines. A test array of 15*18 elements is fabricated, and the measured results show that the vswr ＜2.5 within 45° scan range from 6.5 to 12GHz is obtained. As seen, the antenna has good wide-band and wide-scan capabilities, along with its good manufacturability and high power withstand, the antenna is potentially suitable for applications in phased array radar field.