If you want to extend your wifi coverage just watch this video and follow the steps and if you have any problem post a comment and i'll answer it as soon as possible
i hope you enjoy the video and learn new things
Today we will learn how to install a satellite dish so, we will watch this video and follow the steps.
In this video you will see and recognize the Array Antenna Fundamentals.
So as not to linger on you, leave you to watch the video, and in case of any queries you have, you can comment the end of the matter, let us watch the video.
This video demonstrates how to build a home radio tri-band 6 meter, 2 meter
& 70 cm yagi beam antenna using an old TV antenna for parts.
A simple design using dipole driven elements
In this lecture, we'll show some pictures with explanations about monopole antenna.
A monopole antenna is a radio antenna that is one half of a dipole antenna combined with a right-angle ground plane of considerable length in place of its other half.
A dipole antenna has two halves, while a monopole antenna replaces one of the halves with an electrically conductive surface known as a ground plane, which behaves like the other half of a dipole antenna.
With a large enough ground plane, the monopole antenna can be as strong as a dipole antenna. Automobile antennas are a common example of a monopole antenna, with the metal of the automobile itself forming the ground plane.
A cross-sectional view of the antenna, clearly showing the upper frequency notches (side) and lower fequency notch (centre).
A coax of 75 Ohms is used to feed the antenna. The behaviour of the antenna can be easily investigated using CST MWS. Three configurations were simulated; With all notches present, with only the centre notch and with only the side notches.
The S-parameters for the 3 aforementioned cases are shown in this Figure .
As expected, the side notches contribute a high frequency mode with a low frequency mode results from the central notch.
The combined effect is shown in complete all-notches configuration.
The 3D Farfield plots at 4GHz and 4.78 GHz are shown in this Figure with the polar forms in Figure 5.
These results correspond to those presented in [1] where simulated results were compared to measurements for a wide-range of antenna configurations.
In this topic, we'll show some pictures with explanations about small loop antenna.
The small loop antenna is a closed loop. These antennas have low radiation resistance and high reactance, so that theirtg impedance is difficult to match to a transmitter. As a result, these antennas are most often used as receive antennas, where impedance mismatch loss can be tolerated.
Loop-stick antenna
Ferrite core and multiple turns
Large radiation resistance
AM receiver
Crystal loop antenna
Efficient antenna: multiple turns
Direction of current, feeding point
There are many websites detailing the construction of cantennas, all of them referring to a pigtail. A pigtail connects the antenna to the WiFi adaptor. However, any length of cable induces signal loss through impedance of the electromagnetic wave.
This cantenna design does away with the pigtail by using an n-type to reverse polarity male SMA adaptor. This adaptor connects your cantenna directly to a WiFi adaptor without need for a pigtail.
The microwave signal is processed in the adaptor so you can then use a long USB cable to connect from the WiFi adaptor to your computer without signal loss.
The cantenna is directional so you will need something like a tripod to direct and hold the cantenna in place. Expect about a 3dB improvement of the signal, which is roughly a doubling in power, and hopefully many more access points being revealed.
I won't go into detail about the construction of a cantenna but point you towards
http://www.saunalahti.fi/elepal/antenna2.html for detailed measurements.
However, do look at the slide show to see the subtle difference that obviates the need for a pigtail.
Parts List:
High power WiFi USB adaptor with SMA connection for antenna ( I use an ALFA AWUS036H)
Can - over 76mm in diameter (Long and thin is better than short and fat)
N-type female chassis connector
N-type male to RPM SMA adaptor
Some thick unsheathed copper wire (about 1 to 1.5mm diameter mains wire is best)
Solder
Four small nuts and bolts to attach N-type female to can
Tools:
Drill and bits (cone bit to make hole for n-type chassis connector)
Soldering iron
Screwdriver
Wire cutters
You can see other self-reliant things I make and do at
http://www.ecopunk.org.ukreference:
http://www.instructables.com/id/WiFi-Cantenna-without-pigtail/