# CHU–MCLEAN RELATION BY INTEGRATION OF THE FINITE SPHERE

Presented a new method of deriving the well-known relation Chu–McLean binding radius of the sphere around the electrically small antenna and maximum achievable quality factor. A derivation is simple and is based on the calculation of the flow Poynting vector through a sphere of finite radius and the formation of Q-factor, as the ratio of the real and imaginary part.

**Authors:** L. M. Liubina, A. Yu. Odintsov, M. I. Sugak

**Direction:** Radioelectronics and Telecommunications

**Keywords:** Electrically small antennas, Q-factor, unit sphere, ratio of Сhu–McLean

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