Experimental study of phased antenna array of four knotted antennas in the fifteen-leaf form

The results of a pilot study of the phased antenna array (PAA) consisting of four elements, designed in the form of wire knotted antennas in the form of fifteen-leaves are described in this article. The radio communication system with such transferring and receiving element has abnormally low attenuation on the increase of a communication distance, that is signal attenuation rate is no more than 1,5 dB/octave (octave - increase of communication distance twice), while classical antennas have attenuation rate of 6 dB/octave. The communication system with PAA consisting of these elements don-t find signal attenuation on the increase of a communication distance within an error of measuring equipment, that is the bunch of a knotted electromagnetic wave practically doesn't disperse. For example at a communication distance of 2 meters signal attenuation rate is no more than 0,5 dB/octave.

Measurements were carried out in the multilayered anechoic camera. The anechoic camera consisting of five layers of radio absorber, had reflection suppression of ≥ 100 dB. The communication distance of two PAA in the anechoic camera with the length of 2,5 m was changed in the range from two wave lengths (24 cm) to 15 wave lengths (180 cm). The operating frequency of the communication system is 2,316 GHz.