ETS-Lindgren HI-4456 Isotropic Electric Field Probe (Archived) - Manual (Page 6)

HI n 4456 Manual Page — 1
1.0 DESCRIPTION
Introduction
The HI-4456 RF Electric Field probe is a broadband
isotropic sensor suitable for a wide range of
RF/microwave measurements. While the HI-4456 is
suited for many types of measurements within its
frequency range, it is primarily designed for measuring
pulsed fields such as are found in radar applications. The
thermal sensor elements respond accurately to a wide
range of signal waveforms, providing a true RMS
representation of the field waveform.
Applications include: health and safety monitoring, radar
transmitting antennas, and measuring any type of RF
pulsed radiation. The HI-4456 probe is optically isolated
to minimize field perturbation during measurements.
The HI-4456 probe assembly consists of a spherical
casing, containing the sensor, which is mounted on one
end of a shaft; the other end of the shaft is attached to
an extrusion which houses the electronics (Figure 1 n 1).
The sensor and electronics housing operate - and are
calibrated - as a unit.
The HI-4456 sensor consists of three mutually orthogonal
(perpendicular) electric field sensors. The electric field
components in each of these directions are summed as
vectors and the resultant field value (magnitude)
transmitted via the fiber optic cable to the receiver (HI-
4416 System Readout or HI-4413G RS-232 Computer
Interface).
The frequency response of the HI-4456 extends from
300 MHz to 18 GHz. Extended frequency calibration
points are available up to 40 GHz.. The dynamic range
Archived 4/2/10