10dB router orientation antenna production, router antenna
Keywords: 10DB router orientation antenna production
I saw a lot of thousands of monster antenna on the Internet, but it is generally not a non-back-oriented antenna and a full-to-directional antenna. Moreover, it is very small for the prevention accuracy and difficulty. 2.4GHz itself is a high frequency requirement. If you have a bad ability, don't do a lot of netizens to see the online production information to find materials, and then work overtime. Waiting for the antenna discovery, it is not very good, or there is such a problem, it will be willing to sit down and continue to study. In fact, you can study it again, all the paper on the screen, do you know its materials? Because it comes from all over the world. Shorten rate, balance - imbalance conversion, principle, construction, impedance matching, etc. At the very least, I will understand some principles. For example, some netizens have done a diamond shape, I don't want to be a 4 diamond shape, the size and the original result have made the gain without high, and the gain is high There are a lot, because the impedance of the double rhodes and 4 diamonds are different.
The antenna length of the wireless system is usually 1/4, 2.4 GHz using frequency wavelengths due to high frequency, and the wavelength is of course short, so the antenna is naturally short, so use 2.4GHz system, of course, no need for traditional long rod antennas. . Single rhombus four edges: 1/4 wavelength of each side, a single rhombus is 1 wavelength, some people account for shortening the factor (according to the line diameter thickness 0.96-1.05), so there are so many values run out, it is best to calculate it.
The wavelength of the frequency is 2.4 GHz is 12.5cm, 2.4g wavelength = 3 * 108 / 2.4? .... * 109 = 0.125m = 12.5cm, depending on the frequency point. If the wavelength of 2.45 g of the frequency is 12.24 cm, 1.5mm copper wire is reduced by 0.96, then the edge length = wavelength * shortening coefficient / 4=29.39 mm
The width of the reflecting plate should be greater than 12.5cm, and it is also reasonable to take 140mm, but don't be too big, it can have an arc.
In order to reduce clutter interference, a baffle can also be produced in front, and a clutter is filtered out of a wavelength of several tens of millimeters, of course, this process is high, and it is also possible.
The line can be used to use a 50 ohm coaxial cable, and the length calculation should match the impedance. 2.4G high-frequency signal is attenuated, and the feeder is preferably less than 1 meter.
Reflective plate shielding can get a greater gain, double-rib gain 10dB, shield 12dB; four rib gain 13dB, shield 14db
A rhombus standard is 3.15dBi, plus reflecting boards 3dB, diamonds plus 3dB per double, so Double Firi is 3.15 + 3 + 3 = 9.15dbi; four mite 12.15dBi; Mri 15.15dBi; 16 diamonds 18.15dbi; 32 rhombic 21.15dbi; 64 diamond 24.15dBi; 128 diamonds is 27.15dbi; to reach 30DBI gain requires 256 rhombuses! ! !
When the high gain antenna is applied in a short distance, its effect is not necessarily better than the low gain antenna (near distance, the low-gain antenna "equivalent area", sometimes than the high gain antenna, if Plus in indoor use, because the relationship between multiple paths, the effect of high gain antennas is not necessarily better than the low gain antenna.
Below is a foreign website 10DB orientation antenna production process:
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