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Video Analysis of Half-Wave Dipole Antennas. In this video, we go over the short-dipole antenna, the half-wave dipole antenna and the general dipole antenna. The idea is to give an intuitive overview of the first 3 antennas we've discussed.
- Broadband Dipoles
A standard rule of thumb in antenna design is: an antenna...
- Antennas List
A list of different antennas (antenna types) with links to...
- HPBW
In addition to directivity, the radiation patterns of...
- The Dipole Antenna
The dipole antenna is symmetric when viewed azimuthally...
- Broadband Dipoles
The dipole antenna is symmetric when viewed azimuthally (around the long axis of the dipole); as a result the radiation pattern is not a function of the azimuthal angle . Hence, the dipole antenna is an example of an omnidirectional antenna.
Antenna Theory - Half-Wave Dipole - The dipole antenna is cut and bent for effective radiation. The length of the total wire, which is being used as a dipole, equals half of the wavelength (i.e., l = λ/2). Such an antenna is called as half-wave dipole antenna.
A more practical dipole is the half-wave dipole (referring to the fact that it is =2 long). The main reason for this, as we will see, is that the half-wave dipole has a real input impedance at resonance which is close to common system impedances.
18 sie 2023 · The half wave dipole is not only one of the most simple and common antennas, but it also forms a basic building block for many other types. This is a common drawing of one: But that really isn’t too practical – you can’t get it perfectly horizontal when supported by ropes on the ends, as the weight of the wire and feedline will make it ...
A dipole is omnidirectional in the plane perpendicular to the wire axis, with the radiation falling to zero on the axis (off the ends of the antenna). In a half-wave dipole, the radiation is maximum perpendicular to the antenna, declining as sin θ to zero on the axis.
Using the basic expressions for radiation derived in Section 10.1, simple short dipole antennas are shown in Section 10.2 to have stable directional properties far from the antenna (the antenna far field), and different directional properties closer than ~/2λπ (the antenna near field).
