Critical phenomena of three waves and the mechanism of homoclinic crossings

Abstract

It is demonstrated that the pulse spectroscopy in combination with piezoelectric resonance makes an ideal nondisturbing tool for the measurement of electric field near an antenna. The dependence of the picked up resonance signal on the amplitude and direction of external electric field was quantitatively evaluated. This new field sensing technique was used to investigate the field of a ring antenna the near field of which is widely used.