Microwave Forum

richy_64 · Administrator Messages: 198

[Draft !]

Hi,
i started to build a point-to-point wi-fi link, with two old Technisat pfa satellite antenna dishes (1m reflector diameter each).

Pfa means prime focus antenna, like this one:
http://www.satlex.de/de/satcom_pfa-page_1.html
Today, most satellite dishes are offset dishes because they take less place.

Why?
To connect two houses with wi-fi, distance: 1,5km. NO free line of sight. Sharing one DSL broadband connection with two houses to save money.

Inspiration:
http://www.trevormarshall.com/biquad.htm

Unfortuantely, i don´t have the pictures of the whole antennas yet, next week, 17/18 november i can will add them.

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There was one strange thing when i constructed those biquad feeds. I assumed that a bi-loop will work as good as a biquad... i think the loop looks more beautiful... but when i tested them with a network analyser, S11 of the bi-loop was really bad, -5dB return. I can´t imagine what might has been wrong with it... i decided to use the normal biquad, which had good values at the first try (lower than -10dB return).

The biquads are mounted on the original tripod of the satellite dish, where usually the lnb is installed.

kleiner-onkel · Administrator Messages: 412 Location: South-West-G

Hi Richard

Nice article... ,,, send us our results...

OH... I see hot glue is our friend... my too (;->

By the way... does hot glue absorb rf???

greetings Chris

richy_64 · Administrator Messages: 198

Zitat: kleiner-onkel

... does hot glue absorb rf???

Hi, i don´t know if it does, but perhaps i should write a letter to the manufacturer of those glue sticks... "Can you tell me the epsilon eff. of your glue sticks at 2.4GHz?"

Another problem: I bought two multipacks of glue sticks some years ago from Aldi... Should i send THEM my letter? Not?!

richy_64 · Administrator Messages: 198

Some pictures...

richy_64 · Administrator Messages: 198

richy_64 · Administrator Messages: 198

richy_64 · Administrator Messages: 198

I would like to let the dish under the roof... don´t know if this will work... somewhere at the horizon is the target....

kleiner-onkel · Administrator Messages: 412 Location: South-West-G

Hi Richard...

Nice pictrues.... i hope your link work as you inmagin.... and if not... i'm sure you will fix all problems. No... i never seen you befor... .. how are you... in our new firm...?

I'm very busy at the moment... and study is no "pony range (:->)) C-Programming is very hard to me... and lot of work had do be done. Greetings from Offenburg Germany.

Chris