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 10-4m2||1 x 10-2m2||3 x 10-3||1 x 10-3m2||3 x 10-4||1 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|
|A (cm) - see outline||39.4||47.5||36.35||38.58||17.78||61.6|
|B (cm) - see outline||2.54||14||10.16||7.6||5.08||28.26|
|C (cm) - see outline||1.09||10||5.66||3.31||1.95||31.12|
|D (cm) - see outline||0.16||0.51||0.48||.32||0.32||0.64|
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