This is a wire, the positive goes into the negative and stays out, now disconnect the wire,
This becomes a dipole antenna, don’t you think? ok straighten the wire
The magnetic fields at both ends point to infinity, which is a dipole
What? Dual frequency dipole?
Don’t wait long
As for the length, the theory: lambda=c/f, generally take 2×1/4λ
It depends on what frequency band you want, dielectric loss, etc.
Antenna gain refers to the ratio of the power density of the signal generated by the actual antenna and the ideal radiating unit at the same point in space under the condition of equal input power. It quantitatively describes the degree to which an antenna concentrates the input power and radiates it.
Antenna gain is a very important part of the antenna knowledge structure, and of course it is also one of the important parameters for selecting an antenna
The relationship between the size of the general designed antenna and the operating frequency of the antenna is:
Antenna length = C/(2f)
A simple and convenient method of making a radio antenna, the effect is very good, and it is now posted to share with everyone.
Reflectors are widely used to change the lobe pattern of an antenna. Using a sufficiently large flat reflector can eliminate the back radiation of the antenna and significantly increase the antenna gain
The evaluation and production methods of the flat-panel booster antenna are complete. It seems that the finished antenna still has advantages.
Antennas are an essential part of wireless transmission. Except that we use optical fibers, cables, network cables, etc. to transmit wired signals, as long as the signals are transmitted by electromagnetic waves in the air, various forms of antennas are required.
No account yet?
Create an Account
