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All Schottky Diodes are Zero Bias Detectors - App Note

From Avago Technologies
 

 
Zero bias detectors with higher forward voltage have better voltage sensitivity. For example, the HSCH-3206 with a forward voltage of about 200 millivolts at 0.1 milliampere is better than the HSCH-5019 with a forward voltage of less than 100 millivolts. Application Note 969, "An Optimum Zero Bias Schottky Detector Diode", analyzes this relationship but points out that conventional detector diodes such as the 5082-2755, with even higher forward voltage are not usable at zero bias because of losses in the matching circuit. Recent study has shown that the limitation of these diodes is not matching loss but is related to the load resistance. With proper load resistance voltage sensitivity above 30 millivolts per microwatt was measured at 10 GHz for the 5082-2755 diode at zero bias.
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Topics of Interest
A conventional Schottky diode detector such as the Avago Technologies HSMS-8101 requires no bias for high level input power - above one milliwatt. However, at low levels, a small amount of dc bias is... (Read More)
The zero bias Schottky diode detector is ideal for RF/ID tag applications where it can be used to fabricate a receiver which consumes no primary power. However, its performance is heavily dependent... (Read More)
Conventional Schottky detector diodes are tested and specified with 20 microamperes of DC bias. The bias current reduces the junction resistance so that most of the detected voltage appears across the... (Read More)
This application note has been written to demonstrate how the Avago Technologies EEsof ADS software package can be used to simulate a diode detector circuit reliably against temperature. For this... (Read More)
Diode detectors may be combined in various ways to produce higher output voltages than would be produced by a single diode. This note describes a microwave circuit that combines the detected output of... (Read More)
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