The symmetric semicircle dipole sensor’s coupling property is better than that of asymmetric semicircle dipole sensor.
The symmetric semicircle dipole sensor ‘s radius, the feeder pole position and the height of the feeder pole are affect the sensitivity of the sensor characteristics.
With the increase of radius of semi-circle plate, the peak of the sensor sensitivity moves to the lower frequency band.
For symmetrical dipole senor, when center feeding, its sensitivity curve peak is almost four times higher than that of noncentral feeding.
Visible, for the symmetrical semicircle dipole inner sensor, when the radius of semi-circle plate for 90 mm, using center feeding and when the height of the feeder pole is 20 mm, the sensitivity of the sensor characteristics is the best.