Curve Broadband Wire Antenna Numerical Method

The thesis focus on the numerical analytical method of curved broadband wire antennas. First, the paper introduced the development of broadband antennas, the common measures to broaden antennas' bandwidth and the study on curved antennas. Second, the generalized Halen integral equation (Mei's equation) was derived based on the three basic equations of wire antennas by two means and its numerical solution method was discussed. Since complicated differential and integral operations were involved in the kernel of the integral equation, we simplified the equation and got the Nakano equation. As instances, the planar Archimedean spiral antenna, the planar equiangular spiral antenna, the monofilar helical antenna, the conical helical antenna with fixed ascending angle and the conical equiangular-spiral antenna were analyzed through the moment method. All of the results matched fairly well with the references and experiment results. To prove the program was correct, the straight wire antenna was analyzed. The method proved to be efficient for the analysis of arbitrary wire antennas.