Wi Fi Antennas For Computers Free Shipping On
The J-E4RH (Roof-mount) and J-E4MH (Magnetic-mount) cellular antennas can also be used as high-performance 2.4 GHz Wi-Fi antennas. The yagi wifi antenna design depicted here can be built in just an hour or two, and it works great It is computer designed, made of wood and wire, and provides high gain and directivity. It is directional - favoring wi-fi signals in one direction and rejecting interference from the sides or behind the antenna.Get the best deal for Wireless-Wi-Fi 802.11a USB Wi-Fi Network Antennas from the largest online selection at eBay.com. Browse our daily deals for even more savings Free shipping on many itemsOur range of Wi-Fi antennas is shown below. In cases where Wi-Fi communication occurs between the on-board PC/router and other devices which are inside the same vehicle (such as a router providing Wi-Fi hotspot services to passengers on a bus), direct-connect antennas are normally suitable.Linksys RE6500 AC1200 Dual-Band Wireless Range Extender.
Create a cantenna to drastically extend your Wi-Fi signal! Works great with a router that has external antennas, like the old-school classic WRT54G. Compare Item WiFi 6 Range Extender AX1800 Mesh Repeater and Signal Booster, Wall Plug in, Easy Setup, Smart Home Roaming, Ethernet Port (DAP-X1870)>. Select 2 to compare.TECHTOO WiFi Antenna Dual Band 7dBi 2. Using a USB Wi-Fi adapter with your desktop PC is a great way to connect to the Internet if you have a wireless.However, when Wi-Fi communication occurs between the on-board PC/router and devices which are outside the vehicle (e.g. A router providing a Wi-Fi hotspot to a service engineer's laptop which is outside their van, or a PC connecting to a depot-based Wi-Fi access point) then we recommend using roof-mounted antennas - or, failing that, internal glass-mounted antennas.All our Wi-Fi equipped PCs, and all our Wi-Fi routers except the GX450, require two Wi-Fi antennas, in order to support MIMO technology.
Pigtail) or an N-male to RP-SMA-male cable for connecting to USB adapters RP-TNC-to-N-male cable for connecting to most routers (a.k.a. Empty 1qt baby formula can or other similarly-sized aluminum can A wireless router with external, removable antennas, preferably with custom firmware or a wireless USB dongle with a removable antennta
Fine-tip Sharpie or other utensil to mark the location of the screws Can opener (or something to remove the lid with) Digital (preferred) or analog calipers or just a tape measure Soldering iron (a fine-tip with lower heat works best) 12-gauge copper (if you have scrap cables, you could also unsheath them and see if the copper wire is thick enough to fit into the N connector)
If you can, imagine you can create waves in a small pool. The wavelength of a signal is the velocity of the wave divided by the frequency. Dimensions of the Can MatterEach radio frequency has a different wavelength. Radio waves will be “guided” into the can and interact with the wire element, which sends a signal down the pigtail cable and then to your computer or router. Basic understanding of wireless networking concepts (radios, wavelengths, frequencies, etc.)The aluminum can acts as a medium for the radio waves to be guided through, hence the term waveguide cantenna.
If you can perfectly match the size of your waves to fit inside the can, you will get capture the most water, or in our case, a wireless signal. If you make really large waves in the water but have a really small can, you won’t catch many or they will just break up. The wavelength will be the distance between each wave you produce.Now imagine you want to catch some of those waves in an aluminum can. The frequency is how many waves you can make in x amount of time.
The diameter of the can should be longer than 1/2 of the wavelength The length of the can should be longer than 3/4 of the wavelength This will also help conceptualize what to do when making it or if you are modifying the can for a different frequency. Guidelines to Cantenna DimensionsThere are a few basic guidelines to follow when making a cantenna. In order to find out the right size of the can, we need to do some math.
For f, we need to plug in the Wi-Fi frequency. For the purposes of an easy-to-remember formula, I rounded up and converted meters to Mega meters.Wavelength (mm) ≈ Velocity of wave (Mm/sec) / Frequency (GHz)We know v will be 300 (rounded up based on the speed of light mentioned above). Formula for Calculating the WavelengthFirst, it is important to know that radio waves travel at the speed of light, which is about 300 Mega meters (Mm) per second (the exact speed is 299,792,458 meters/sec). Use this calculator to determine thisThere is an online calculator, which will help you determine the dimensions of your cantenna. The copper element should be x millimeters away from the back of the can (rear standoff)–this is based off the overall diameter of the can.
Or if you are feeling very bold, examine the Radio Frequency Allocation chart, which gives a very broad but complex overview of all the available radio frequencies. Breaking Down 2.4GHz into Smaller PiecesIf you are confused about using 2.437 instead of just 2.4, take a look at the chart below to see how each channel has its own frequency. Solving for w yields ~123mm.Now that we know the wavelength for our radio frequency, we can begin calculating the dimensions of the can based on the guidelines mentioned previously. For channel 6 in the 2.4GHz spectrum, we need to plug in 2.437.
Once you start working with other frequencies, the cantenna might become ridiculously large or impossibly small. Finding the Wavelength of Any Frequency Making cantennas to work with any wireless signal2.4GHz is a common frequency for Wi-Fi and its wavelength makes the canntenna an ideal size–not too big, but not too small. While this may not seem like much, if you have ever changed your wireless routers channel to get a better signal, you know that it does make a difference.
Measure ~63.5cm or ~2.5in from the back of the can (this will be different if you are not using the same can that I did)2. Empty the can by using its contents as intended (give baby formula to a baby drink juice or consume food that the can contains, etc.)1. You should still be able to follow along, but any specific dimension steps will need to be modified to suit your can. If you have a different sized can, you will need to calculate the dimensions based on instructions above in the How the Cantenna Works section. I will be using numbers from the How the Cantenna Works section above to calculate the dimensions.If you were able to find the same can that I used (a 1qt Enfamil baby formula can), then you can simply follow the instructions below. Creating the Cantenna (Step-by-step) Dimensions for the CanThe size of the can will make a difference on the quality of the signal.
Solder the copper element into the N-connectorCaution: Be careful not to melt the plastic contained in the N-connector. If you have never soldered before, learn how, and then cut a few pieces to practice with before working on the actual connector. Solder the Copper Element into the N-connectorOnce you have the copper element cut to size, it needs to be soldered into the connector. I suggest cutting a larger piece, fitting it into the connector, and then trimming it down after it is installed.
The great thing about this router is that you can add DD-WRT firmware, which will give you the ability to choose which antenna is transmit and which is receive. The picture below shows the classic WRT54G being used. The router or dongle needs to have a removable antenna. Screw the N-connector to the can Connect the Cantenna to a Wireless Router or Wireless USB DongleYour cantenna is almost done just connect the pigtail cable from the cantenna into a wireless router or wireless USB dongle. Attach the N-connector to the CanOnce the N-connector is complete, you are ready to mount it to the can using the four screws.1.
Connect your cantenna to a Raspberry Pi and use it as a handlheld router or wardriving machine. Screw the other end into a compatible router or USB dongle What to Do Next Screw one end of the pigtail into the cantenna’s N-connector2.
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