UWB Antenna with Improved Efficiency for Pulse Radiation

One of the most critical hardware components for the performance of the UWB system is the antenna and the resistive loading antenna is one of common antennas used in the system. The author extends Wu-King linear current distribution to the double exponential current distribution and modifies the inaccurate part of the Wu-King loading profile and deduces an improved loading profile with high efficiency. The broadband performance of the improved resistive loading antenna has been studied; the concept of lengthening coefficient is created and the optimum parameter design curve of the antenna is provided. Numerical analysis shows that the improved resistive loading antenna exhibits better bandwidth and efficiency than Wu-King antenna. It can reduce the late-time ringing, enhance the pulse radiation characteristics of UWB antenna. The improved loading profile can be widely applied to other resistive loading antenna for UWB applications