Microwave Forum

richy_64 · Administrator Beiträge: 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.