- 11 GHz Dicke switch radiometer prototype ( 50k ), resolution ~1 K ( image of the moon )
- 11 GHz Dicke switch radiometer ( 66k ) for radio astronomy, resolution 0.06 K
- 12 GHz total power radiometer for measurement of radio temperatures
- handheld portable 12 GHz radiometer for detecting RF corona, good for demoing RA !!! ( photo, 42k )
- 11 GHz demonstration radio telescope ( can detect moon with 28 cm dish )
- here is a block diagram (9k) of my latest cost effective Dicke switched front end for 10 GHz
- and here is a photograph (44k) of the prototype 11 GHz setup with integrated ambient reference
- latest (18k) prototype of my integrated hot reference load C band Thot/Tcold switcher
- 4 GHz total power/Dicke radiometer for radio astronomy
- a 1.4 GHz downconverter & LNA for SETI League Project Argus and radio astronomy
- an article ( less figures, images and formulae ) from 1996 on a Dicke Radio Telescope design of mine
- some recent circuits I have used: RF detector, high level amp, downconverter using commercial tuners
- photo of the high level IF amp (86k) and the IF AGC (90k) and Detector
- a simple prime focus dish focus, gain and beamwidth calculator for the HP41C
- recent development (2002) covers a 10 GHz comparison polarimeter (20k)
- a typical plot (about 30 minutes) of the drift (5k) of this design at room temperature
- there is only one RF stage per polarisation that is outside the loop, but both are on a common substrate
- recorder output dynamic range is about +- 10 V
- here you may find a zoomed in (7k) view of the residual instability of the polarimeter
- this photo shows the simplicity (44k) of the polarimeter "business end"
- experimenting with the polarimeter in my workshop is very difficult
- fluorescent lighting is very loud and strongly polarised at 10 GHz !
- to help experimenting, I put together a polarisation calibrated test setup
- this setup allows polarised reference (57k) "continuum" noise to be injected from a distance
- the prototype is ready for solar flare detection - only a small tracking dish is needed ;-)
- latest experiment: a dirt cheap C band waveguide load for the T hot reference :-)
