As the frequency or the size is increased , a standing wave starts to develop in the current , and the antenna starts to acquire some of the characteristics of a resonant loop ( but is n't resonant ) ; these intermediate cases thus can not be analyzed using the concepts developed for the small and resonant loop antennas described below .
As the frequency or the size is increased , a standing wave starts to develop in the current , and the antenna starts to acquire some of the characteristics of a resonant loop ( but is n't resonant ) ; for this reason , these intermediate cases can not be analyzed using the concepts developed for the small and resonant loop antennas described below .