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The
Satenna (29 dBi)
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The Satenna is a complete unit: 65cm satellite TV dish, plus
SatCap. The combined gain is 29 dBi.
You can make your own Satenna by simply buying or building a
SatCap, and combining with a locally purchased satellite
TV dish. Search
your local 'Yellow Pages' for satellite TV installers for good prices on dishes
and roof mounts.
You can buy a complete Satenna or SatCap
here
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Pictures show the Satenna with the feed oriented for a Horizontally
polarized signal.
Click
images to enlarge |
This NetStumbler file shows two sections:
 | First = Modified Galaxy 24dBi antenna
(with no
extra cable) |
| Second = Satenna (65 cm dish + SatCap) and
extension Coax with 1.4 dB loss. |
The test setup was:
| AP |
30mW radio connected to a 180-degree waveguide
(See BICTON-AP for details) |
| Distance |
870m |
| Test End |
30mW RoamAboutDS PCMCIA card, 200mm pigtail,
plus
antenna under test. |
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Click image to see
full scale
Download
file |
Because of the high gain offered by this dish, you must attenuate the signal to
remain within the maximum 4W/36 dBm EIRP permitted in Australia. The table below
shows the configurations that meet the requirements.
EIRP (dBm) = TX Power (dBm) + Antenna Gain (dBi) - Cable Loss (dB)
| Transmitter Power |
Antenna Gain
dBi |
Cable Loss
dB |
Total EIRP
dBm |
| mW |
dBm |
| 30 |
15 |
29 |
8 |
36 |
| 60 |
18 |
29 |
11 |
36 |
| 100 |
20 |
29 |
13 |
36 |
Because of the wind loading with a solid dish, you can not mount up a mast. You
must mount with a dish mount, which you can get from your local satellite TV
installer - check your local Yellow Pages.
Satellite dish mounts come in a variety of standard types:
| Gutter Mount: For tiled roofs, with dish located above the gutter |
| Pole mount: For Tiled roofs, located higher up the roof |
| Tin Roof: For (you guessed it) metal roofs |
| Universal Mount: For mounting on the side of a solid
(brick/Concrete) wall, and a variety of internal roof mounts. |
Price
See Prices
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