ETS-Lindgren HI-4457 Isotropic Magnetic Field Probe (Archived) - Manual (Page 6)

HI n 4457 Manual Page — 1
1.0 DESCRIPTION
Introduction
The HI-4457 RF Magnetic Field probe is a broadband
isotropic sensor suitable for a wide range of
RF/microwave measurements. The high frequency
response of this probe makes it well suited for near field
measurements in the higher frequency bands approaching
1,000 MHz.
Applications include health and safety monitoring. The HI-
4457 probe is optically isolated to minimize field
perturbation during measurements.
The HI-4457 probe assembly consists of a conical 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-4457 sensor consists of three mutually orthogonal
(perpendicular) magnetic field sensors. The magnetic
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-4413P RS-232 Computer
Interface).
The frequency response of the HI-4457 extends from 10
MHz to 1 GHz. The dynamic range of the probe extends
from 0.3 mW/cm 2 to 265 mW/cm 2 .
Archived 4/2/10