The design of a new quadrature VCO (Voltage Controlled oscillator) is obtained through a cross-coupled double LC oscillator, using the coupling coefficient to control oscillation frequency.
The test proves that the caudal fin oscillation frequency, the maximum amplitude of vibration of caudal fin, the caudal fin strikes the water angle influence the fish's speed;
The half-cone-angle has little effect on the oscillation frequency of thrust.
Due to the lasing effect, the peak modulation frequency of extinction ratio and chirp occur at the relaxation oscillation frequency.