J4 ›› 2009, Vol. 36 ›› Issue (5): 951-956.

• Original Articles • Previous Articles    

Method for a linear array beam focusing in the near field based on amplitude weighting

ZHONG Lan-xiang1;LI Hong-hong1;ZHANG Zhi-yong1;SONG Yong-ming2   

  1. (1. School of Info. Science and Tech., Northwest Univ., Xi'an  710069, China;
    2. Physical adn Chemical Geological Prospecting Party of the Shaanxi Geology Bureau, Xi'an  710055, China)
  • Received:2008-12-16 Online:2009-10-20 Published:2009-11-30
  • Contact: ZHONG Lan-xiang E-mail:lanx@nwu.edu.cn

Abstract:

Based on amplitude weighting, an approaching-to-function method for a linear array beam formed in the near field is proposed in order to reduce the complexity and cost of the phase shifter and controller in the phased array. By assuming that the amplitude distribution function in space to be δ(r-r0),  in which r0 is the vector of focus, the value of every element radiation amplitude can be calculated. The validity of the method is also illustrated with examples. Moreover, this method can be extended to the planar array or other array elements with different polarization directions.

Key words: phased array, amplitude weighting, beam focusing, simulation experiment

CLC Number: 

  • TB553