Efficient computation of sleeve monopole antennas using Z matrix interpolation
SUN Bao hua,LIU Qi zhong,ZHANG Hou,JIAO Yong chang,YIN Ying zeng (Research Inst. of Antennas and EM Scattering, Xidian Univ., Xi′an 710071, China)
The analysis of antennas over a wide frequency range often requires the computation of the impedance matrix Z at each new frequency using the method of moment. This paper describes a method of Z matrix interpolation, which can approximately reduce the computing time by 10 times and lead to a very small error. Finally, using the Z interpolation method incorporated into an optimization technique, a practical sleeve monopole antenna, with the VSWR of less than 2 6 and the gain of more than 5 1 dB in the 200～ 700 MHz frerquency band, is designed. The calculated results are in good agreement with the experimental results.