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Method of mode decomposition based on virtual ports for circularly polarized micro‐strip antenna
Author(s) -
Wang Yi,
Su Yan,
Xie ZeMing,
Gao Kun
Publication year - 2019
Publication title -
microwave and optical technology letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.304
H-Index - 76
eISSN - 1098-2760
pISSN - 0895-2477
DOI - 10.1002/mop.31615
Subject(s) - antenna (radio) , coaxial antenna , turnstile antenna , antenna measurement , optics , radiation pattern , patch antenna , helical antenna , antenna efficiency , acoustics , engineering , physics , electrical engineering
A design method of circularly polarized (CP) micro‐strip antenna is proposed. The coefficients of eigen‐mode and the axial ratio (AR) are derived based on the cavity theory. The radiation feature can be estimated from port impedance. The optimal feeding position is found by means of virtual port method. During the derivation, corner truncated patch antenna is used to verify the method. A cross‐slotted CP micro‐strip antenna is designed, which is working at GPS band. Then the fabrication and measurement of the antenna are conducted. Its measured impedance, AR, radiation pattern agreed well with the simulation results, which verify high efficiency of this method for CP micro‐strip antenna design.