## ~bfiedler/website

6dc86059326ee7e479bab43fc6319f960077df36 — Ben Fiedler 5 months ago
```feedback from balz
```
```1 files changed, 4 insertions(+), 4 deletions(-)

M content/blog/build-your-own-wi-fi-antenna.md
```
`M content/blog/build-your-own-wi-fi-antenna.md => content/blog/build-your-own-wi-fi-antenna.md +4 -4`
```@@ 27,7 27,7 @@ waves to a single point.

We built a basic parabolic receiving antenna using a 3D printer and a
female-female [N-connector](https://en.wikipedia.org/wiki/N_connector),
-available in any well-stocked electronics store. The most important part is
+available in any well-stocked electronic parts store. The most important part is
the form of the parabola: it is described by the equation \$y = x^2 / 4a\$, where
\$a\$ is the *focal length*, i.e.  the distance from the center of the antenna to
the *focal point*, at which the signal is concentrated. Of course it is

@@ 52,9 52,9 @@ A friend of mine helped us model and print the antenna using
MK3S](https://shop.prusa3d.com/en/3d-printers/181-original-prusa-i3-mk3s-3d-printer.html).
Of course, any decent 3D modeling software and printer will do here.
Unfortunately, the surface of 3D prints commonly has a rough texture, which
-lowers the effectiveness of the antenna. We fixed this by taping sponge rubber
-in the dish and covering the now smoother surface in aluminium tape. Both
-materials can be bought cheaply in a hardware store.
+lowers the effectiveness of the antenna. We fixed this by taping a high-density
+rubber foam sheet in the dish and covering the now smoother surface in aluminium
+tape. Both materials can be bought cheaply in a hardware store.

{{< figure class="resizable" src="/blog/img/antenna-build.png" alt="The finished antenna build" >}}

```