Yes. A small 1420 MHz test transmitter can be a useful way of checking a two-dish interferometer, but there is one important complication: if you walk close to the dishes,…
No. Side lobes and interferometry fringes are different things, although both arise from interference/diffraction effects. There is an important connection: the observed response of a two-dish interferometer is essentially the…
Yes. Pointing accuracy still matters in interferometry, even if the timing between the two receivers is perfect. The important distinction is: TIMING Determines whether the signals from the two dishes…
A tuned Yagi can be used as the feed for a parabolic dish, including at 1420 MHz, but it is usually not the best choice. The important point is that…
INTERFEROMETRY - WHAT HAPPENS IF THE DISHES ARE MOVED CLOSER TOGETHER? DISH 1 DISH 2 \ / \ / \ / \ / |<------ BASELINE ---->| MOVE DISHES CLOSER TOGETHER…
The new setup is the pair of dishes on wooden mount on right hand side of photograph below:
Voltages measured have changed to these new values: 2.865 V unlocked 0.264 V locked (Previously were 3.8 V and 1.001 V with 4k7 resistor)
If you mean a metal cantenna/waveguide assembled from several separate sheets or pieces, then yes—the electrical connection between the pieces is quite important, especially as frequency increases. The reason is…
Yes—but the terminology is a little confusing. Aluminium foil itself is always electrically conductive. What you can buy is aluminium tape with a non-conductive adhesive. In that case: If you…
That completes the picture very nicely. The 30-minute run looks highly repeatable and stable. The important observations are: So your measured sequence is approximately: The particularly convincing result Your Pin-3…
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