Amateur Radio Stack Exchange
Amateur Radio Stack Exchange

Questions tagged [wifi]

51 questions
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5 answers

How to operate IEEE 802.11 WiFi AP within the amateur radio service?

How can I properly use my ham radio license to operate an IEEE 802.11 WiFi access point within the US amateur radio service, rather than the US "part 15" regulations for unlicensed transmissions?
David Anastasio
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8
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5 answers

How far can a 2.4 GHz, 1 watt signal go in a rural area?

What's the approximate range achievable by a 2.4 GHz signal of 1 watt in semi-urban areas? I can see 2 km from our rooftop. Will a 2.4 GHz signal go that far, i.e. if I send WiFi signals from our rooftop is it possible to catch them on my phone 2…
user40713
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1 answer

Is there a practical way for hams to participate in cellular-related technology advances?

My understanding is that there used to be more timely overlap between commercial and amateur radio technology — e.g. helping study ionospheric propagation, relatively early adoption of SSB technology, up through re-purposing business equipment for…
natevw - AF7TB
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7
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3 answers

How does Wi-Fi antenna work?

Since I'm working with wireless communications, I decided it would be good to educate myself a little and at least get a basic understanding how does a Wi-Fi antenna work. My first question is about the most basic 2.4Ghz antenna that is usually…
xba
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7
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3 answers

Broadcasting a WiFi SSID long-distance

Which equipment would be good for broadcasting a WiFi SSID the longest possible range? We're making an orienteering race in a forest and would place a sender somewhere high over the trees, transmitting a WiFi signal into the forest. The SSID should…
sune
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7
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5 answers

Wifi passive repeater (antenna to antenna connection)

I have two buildings. Building A has wifi (2.4GHz) infrastructure, Building B doesn't. One side of building B can pick up the wifi signal from building A. I want to passively extend the signal through to the rest of building B, using two antennas…
askvictor
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6
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1 answer

Can tropospheric scatter effect be used by 802.11 links?

What are the lowest EIRP and antenna gain requirements that make possible use of troposcatter at the distances of 100 to 150 kilometers assuming conventional WiFi (6 Mbit/s data rate with OFDM/BPSK modulation)? While this is unlikely to work in…
Deer Hunter
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5
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2 answers

Theoretical Wifi antenna not working for the expected range

You buy a "20dBi omni" Wifi antenna, operating in the 2.4-2.5GHz band. You note that the expected range is not achieved from this 300mm long antenna. What could be wrong? Can someone please tell me whether may approach is correct λ(min) = 300/2500 =…
HappyFeet
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5
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2 answers

Yagi vs Parabolic Dish for 2.4GHz Campus Wifi from 1,800ft away?

My apt balcony is 1,812 feet exactly from my campus's Wifi access point behind a triple pane, brick, 4th floor building window. There is a clear line of sight. I was interested in seeing if I could use a Yagi or a Dish to connect to it. I ran this…
Gabriel Fair
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4
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1 answer

Can a WLAN device be used with GNU Radio?

Can I use my wireless ethernet card with GNU Radio? I have a Broadcom BCM4311 mini PCIe, and Debian / Kali 2.0 Linux.
motoku
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4
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1 answer

How does tuning in 2.4 GHz Wifi radios work?

I'm working with a Wifi chipset that has very poor documentation and I was wondering whether I should wait a bit after switching the channel or if I can send a Wifi frame right away. That's when I realized that I have no idea how tuning in Wifi…
AndreKR
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1 answer

What is the average fade margin required for proper operation at 2.4 GHz?

I have two radios. Sensitivity is -84 dBm and transmitting EIRP is +30 dBm. How much distance should I expect? I want it to be somewhere near about 2-3 km. Is it possible?
user40713
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4
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4 answers

My radio in the garage is temporarily shutting down the wifi when I key up

I have a Yaesu FT-101EE, D-104 Mike, MFJ-929 Antenna Tuner, 80-10 OCF Dipole Antenna with a MFJ balun. When ever I key up for more than a few seconds, the wifi network goes down for a couple of minutes disconnecting any attached devices. A couple…
Roy Kees
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4
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3 answers

What effect will placing two receiving antennas next to one another be on the received signals

I'm planning on using 2 receivers that operate on the same frequency. So there's no confusion I'm talking about WiFi signals (but I'm trying to do some cool amateur radio stuff with it!) so the frequency is 2.4GHz. One of the main things I'm working…
FraserOfSmeg
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3
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1 answer

Measuring energy density of 2.4 GHz and 5.0 GHz signals

I'm a math and computer science student, starting to mess around with using amplifiers and antennas to build long-range wifi hardware in my spare time. Calculating the expected power density of a system is easy enough, but--I'd like to measure power…
StudentsTea
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