Prodyn free space electric field (D-DOT) sensors

Prodyn free space electric field (D-DOT) sensors


PRODYN’s AD Model electric field (D-DOT) sensors are small to medium, free-space, high frequency sensors that measure time rate of change of electric displacement. Being differential, they have two asymptotic sensing elements accurately positioned on opposite sides of a common ground plate and have a radial output direction. Testing has shown the asymptotic design to have less capacitance and higher upper frequency characteristics, compared to the AFWL HSD design.

The sensors are passive devices, therefore, an external power source is not required.

AD20R to AD100R D-dot sensors

The Model AD-20 39.4 cm output length can be increased to 1 meter maximum with SMA connectors. Model AD-40 and AD-100 are equipped with a 100 ohm twinaxial GR connector and with gas pressurization fittings. Length of output, output style, and connector type may be modified.

Equivalent Area (Aeq)1 x 10-4m21 x 10-2m23 x 10-31 x 10-3m23 x 10-41 x 10-1m2
Freq. Resp.(3 db pt.)>10 GHz>1 GHz>2 GHz>3.5 GHz>5.5 GHz>350 MHz
Risetime (tr 10-90)<.029 ns<.29 ns<.17 ns<.11 ns<.064 ns<1.1 ns
Maximum output (peak)+ 150 V+ 4 kV+ 1.5 kV+ 1 kV+ 1 kV+ 5 kV
Output connector(s)SMA(Male)GR-TCC*SMA(Male)SMA(Male)SMA(Male)GR-TCC*
A (cm) - see outline39.447.536.3538.5817.7861.6
B (cm) - see outline2.541410.167.65.0828.26
C (cm) - see outline1.09105.663.311.9531.12
D (cm) - see outline0.160.510.48.320.320.64

Prodyn free-field electric field sensors - AD20-AD100


AD65R D-dot Sensor

Equivalent Area (Aeq)1m2
Freq. Resp.(3 db pt.)>51MHz
Risetime (tr 10-90)6.8 ns
Maximum output (peak)+/- 5kV
Output connector(s)Twinaxial GR standard
Optional 2 type 'N' / 2 type SMA
Prodyn AD65R D-dot dimensions



Prodyn AD20R-AD100R Datasheet


Prodyn AD65R Datasheet