Abstract:

The resonance perturbation theory is extended in this paper, and the result could be deduced that the antenna performance in the free space and the resonance frequency of the cavity and antenna system (the antenna is placed in the cavity) are correlative. A new experimentation is designed to verify the correlation between the antenna resonance frequency of antenna and the cavity-antenna system. Experimental results show the correlation coefficient is above 0.93, which proves that the deduced theory is correct. Based on such a theory, a measurement system for terminal antenna quality conformability is developed. The terminal antenna which is produced by the industrialization process could be measured quickly and accurately with this system, and the duration of measurement is less than 10s. So the measurement efficiency could be improved greatly. Besides the small antenna conformability, this system could be used to measure the specification of other small samples such as cable connector.

Key words: perturbation theory, resonance cavity, antenna measurement, quality conformability