ASI Point Contact Mixer Diodes are designed for applications from UHF through 26 GHz.
The overall noise figure is expressed by the following relationship:
NF0 = Lc(NR0 + NFIF - 1)
NF0 = overall receiver noise figure
NR0 = output noise temperature ratio of the mixer diode
NFIF = noise figure of the I.F. amplifier (1.5dB)
Lc = conversion loss of the mixer diode 
They feature high burnout resistance, low noise figure and are hermetically sealed. The are available in
DO-7, DO-22, DO-23 and DO-37 package styles which make them suitable for use in Coaxial, Waveguide and
Stripline applications.
These diodes are available as matched pairs and are supplied in either forward pairs (M) or
forward/reverse pairs (MR). The matching criteria for these mixer diodes is:
- Conversion Loss-DLc = 0.3dB maximum
- IF Impedance-DZIF = 25 OHMS maximum
These mixer diodes are categorized by noise figure at the designated test frequencies from UHF to 26Ghz.
| BAND |
FREQUENCY (GHz) |
| UHF |
Up to 1 |
| L |
1 to 2 |
| S |
2 to 4 |
| C |
4 to 8 |
| X |
8 to 12.4 |
| Kµ |
12.4 to 18.0 |
| K |
18.0 to 26.5 |
All of the point contact mixer diodes meet or exceed the environmental specifications of MIL-S-19500,
MIL-STD-202 and methods from MIL-STD-750 that specify mechanical, electrical, thermal and environmental tests.
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