GBT 3mm Receiver
- Block
Diagram
- Amplifier saturation is a concern when the receiver input
temperature is above 150 K or so. To allow observation of planets
(700K) and
other bright sources, we are considering several options including a
configuration having parallel differencing assemblies. A
conceptual schematic using additional magic tees is shown here .
Alternatively, the signal recombination can be implemented using
a 90 degree hybrid coupler after the mix (block diagram is here
). This configuration allows phase switching in the LO path, a
more accurate technique.
- Components
- Specifications
- Simulations
- W-band square-to-rectangular waveguide transition, S11 .
Here is a perspective view
of the physical model.
- System integration
- Reports
- S-parameter measurements of Millitech's prototype full-band
isolator, at temp = 15 Kelvins
- Photos
