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GC4741

Microsemi Corporation
Part Number GC4741
Manufacturer Microsemi Corporation
Description LIMITER DIODES
Published Mar 23, 2005
Detailed Description ____________________________________ GC4701 – GC4750 CONTROL DEVICES – LIMITER DIODES RoHS Compliant ___________________...
Datasheet PDF File GC4741 PDF File

GC4741
GC4741


Overview
____________________________________ GC4701 – GC4750 CONTROL DEVICES – LIMITER DIODES RoHS Compliant ____________________________________ GENERAL DESCRIPTION The GC4700 series diodes are specially processed PIN diodes designed for use in passive or active limiters at frequencies through Ku band.
Thirteen categories of devices are offered for flexibility in design of low, medium and high power limiters.
Low VB limiters have thinner I regions for faster turnon time and better flat leakage.
Microsemi also manufactures “gold doped” limiters for fastest turn on time.
In addition, we manufacture high voltage dual junction limiters for superior peak and CW power handling.
This series of diodes meets RoHS requirements per EU Directive 2002/95/EC.
KEY FEATURES  Available as packaged devices or as chips for hybrid applications.
 Low Loss  Suitable for applications to 18 GHz.
 Excellent flat leakage performance.
 Low 1 dB compression point.
 Gold Doped Diodes for Fast Turn On.
APPLICATIONS A diode limiter is a power-sensitive variable attenuator that uses the non-linear properties of the diode to provide an impedance mismatch when sufficient amounts of RF power are incident on the device.
The output power is reduced to a level that will not overdrive a receiver, burn out a mixer, etc.
For varying input power levels in excess of the diode’s threshold level, the limiter’s output power tends to remain constant.
A passive limiter is one in which the limiter diodes are “turned on” by the RF signal itself.
An active limiter is one in which the limiter diodes are “turned on” primarily by an external bias current typically supplied by a Schottky detector diode which senses the incident signal.
Since limiter diodes are not designed to dissipate large amounts of power, the limiter must reflect or divert the excess incident power back to the source or to another load (i.
e.
via a circulator, hybrid coupler, etc.
).
Limiter diodes may be used in wave guides, coax, microstrip, strip...


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