The Sun as a 2.4 GHz source, redux.

I previously wrote an entry about how you can see the Sun interfering with the weather radar at sunrise and sunset, seen here. The weather radar uses radio waves at about 3 GHz. Seen linked at Hackaday is a 2.4GHZ field strength meter using a microwave diode, a few capacitors and a simple "quad" antenna and measured using a digital multimeter. They report that the Sun generates a reading on their device!