Research on Radiation Characteristics of Acoustic Excited Miniaturized Antenna Based on Lithium Niobate Piezoelectric Crystal

The size of the antenna is a major factor limiting radio equipment downsizing. However, the size of a traditional antenna is restricted by the wavelength of an electromagnetic wave, making it difficult to minimize the size of the antenna by an order of magnitude. The proposed mechanical antenna based on acoustic excitation has been predicted to deal with this problem in recent years. This paper explains research on the radiation characteristics of an acoustic excited antenna based on a piezoelectric crystal made of lithium niobite (LN). Resonant frequency, voltage linearity, and radiation intensity in the near-field have all been studied. Finally, the calculated radiation efficiency of the LN piezoelectric antenna would be around 3×10
^-10
.