Agilent 423B, 8470B,
8472B, 8473B/C
Low Barrier Schottky
Diode Detectors
Data Sheet
•
Excellent broadband flatness
•
Low broadband SWR
•
High burnout protection
•
Environmentally rugged
•
Field replaceable diode elements
Agilent 423B
Agilent 8470B
Agilent 8472B
Agilent 8473B
Agilent 8473C
Agilent offers a complete family of high performance
Low Barrier Schottky Diode Detectors which cover the
10 MHz to 26.5 GHz frequency range. These general
purpose components are widely used for CW and pulsed
power detection, leveling of sweepers, and frequencyresponse testing of other microwave components. These
detectors do not require a dc bias and can be used with
common oscilloscopes, thus their simplicity of operation
and excellent broadband performance make them useful
measurement accessories.
These detectors use a Low-Barrier Schottky Diode (LBSD),
specially fabricated with low origin resistance and low
junction capacitance. This results in improved broadband
flatness and SWR over point-contact diode detectors, thus
yielding more accurate measurements. These detectors
also offer very good ruggedness and burnout protection.
As with all Agilent detectors, these models integrate the
diode with the other circuit elements thus minimizing
stray reactances and optimizing broadband performance.
For economical field repair, replaceable detector modules
are available.
Figure 1. Diode V/I characteristics.
2
Field-replaceable detector elements
In the event of diode burnout, field-replaceable detector
elements are available for economical customer repair.
The critical components are supplied (and tested) as
an integrated unit, with the mount playing only a minor
role in determining frequency response and SWR. The
following table lists field-replaceable detector modules
that have been tested to their respective specifications.
Agilent model Agilent replacement part number
423B 00423-60003
8470B 08470-60012
8472B 08470-60012
8473B 08473-80001
Option 8473B–001 08473-80002
Option 8473B–003 08473-80003
8473C 08473-80004
Option 8473C–001 08473-80005
Option 8473C–003 08473-80006
Figure 2. Detector frequency response specifications.
Figure 3. Detector SWR specifications.
Figure 4. Measurement uncertainty due to detector source mismatch.
Figure 5. Drawing dimensions given
in specification table.
Figure 6. Typical detector square-law response.
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