Analytic Method of High-order Mutual Coupling Effect of Antenna Array Based on Infinitesimal Dipole Model

An analytic method of high-order mutual coupling effect of an antenna array based on infinitesimal dipole model, characterized by comprising the following specific steps:

• step 1, calculating a mutual admittance between radiating elements, constructing a mathematical relation of first-order and high-order mutual coupling effects, and obtaining a high-order mutual admittance relation between arbitrary two radiating elements m and n:
• and step 2, according to first-order mutual coupling effect between the arbitrary two radiating elements m and n, calculating a port induced current Imn and a port induced current Inm of the arbitrary two radiating elements m and n respectively, deriving a total port current Imm and a total port current Inm of the arbitrary two radiating elements m and n respectively by considering high-order mutual coupling effect, hence obtaining a self-admittance parameter ymm of the radiating element m, a mutual admittance parameter ynm of the radiating element m, a self-admittance parameter ynn of the radiating element n, and a mutual admittance parameter ymn of the radiating element n, obtaining a relation between self-admittance and mutual admittance of the arbitrary two radiating elements m and n by calculation, and then establishing an admittance expression considering high-order mutual coupling effect of an N-element array.