Table_Top H Line Radio Telescope

[Alex P]

A number of people are building larger and larger antennas. I  thought I'd see how a minimalist version of my Student Edition Circular Patch Feed Yagi ( Enhanced Version )

would function 

"Minimalist" meaning  3 Elements Reflector Feed Director

It performed okay, but as the beam-width is Huge ( 56 degrees ) details in  angular resolution are not the best ..

However, the max Hline <> Cold_Sky delta of 0.87 dB exceeds some small systems.

Alex Pettit

[JERRY TAYLOR]

Hi Alex,

Those are great results from such a compact antenna!

Do you think a small array of these could make meaningful measurements in smaller observation areas? I would be interested to hear your thoughts on whether that configuration could improve resolution for those with limited space.

Best regards,
JERRY TAYLOR

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[b alex pettit jr]

If it is possible, I think the effort would be dozens of times more complex than just narrowing the beamwidth with additional directors.

It was  an experiment in making a small antenna rather than it being useful beyond that.

===========================

[JERRY TAYLOR]

Did you just follow the design of your previous antennas for the tabletop version?

Jerry

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[b alex pettit jr]

Yes, I just used the lower 3 parts .. the new design builds the antenna with the lower 3 elements connected

by conductive aluminum spacers on a metal threaded rod to hold them tightly in contact with each other :

the balance of the directors are on a wood or fiberglass rod with plastic spacers.

THIS is the new design .. notice the transition