Can a dipole antenna be curved?
Can a dipole antenna be curved?
They can be bent horizontally, drooped downward, or any other imaginable configuration to fit in the space available. If the resonant length doesn’t change much and the impedance remains close to that for a straight dipole, we would expect a dipole with bent legs to work OK.
How do you increase the bandwidth of a dipole antenna?
A standard rule of thumb in antenna design is: an antenna can be made more broadband by increasing the volume it occupies. Hence, a dipole antenna can be made more broadband by increasing the radius A of the dipole.
What angle should an inverted antenna be?
90 degree angle
An inverted vee antenna is a type of antenna similar to a horizontal dipole, but with the two sides bent down towards the ground, typically creating a 120 or 90 degree angle between the dipole legs.
Is dipole antenna vertical or horizontal?
A vertical dipole antenna is simply a dipole antenna that is mounted vertically instead of horizontally. Because of the orientation, it will have some characteristics different than a horizontally mounted dipole.
Do I need to ground a dipole antenna?
Therefore, a dipole antenna requires two parts in order to radiate and the amount of radiation will be proportional to the dipole current. Note also from Figure 2 that, a dipole does not require a “ground” to work. A good analogy is to consider what happens when we clap our hands.
How can the dipole antenna be improved?
In order to increase the gain of an antenna, you need to concentrate its effectiveness in the required direction. Two common methods are to concentrate horizontal beamwidth by adding reflectors and directors, thus creating a Yagi beam.
Does wire thickness affect antenna?
ANTENNA WIRE you get the impression that the thicker the wire is, the better it will be for performance. A thick wire is always better than a thin wire.
What is the advantage of a dipole antenna?
A dipole will provide low take-off angles for good over-the-horizon skip propagation when it is approximately one-half wavelength above the ground. At lower heights the radiation pattern will become more vertically directed and more omnidirectional.
What should the SWR of a dipole dipole be?
Given the extra-long length of wire left on the dipole segments, the SWR should bottom out at a frequency below the desired operating frequency. In our example let’s suppose you measured a minimum SWR of 1.2:1 at 14.100 MHz.
How do you propagate a dipole antenna over the horizon?
Try to keep the dipole away from other conductors, especially long, linear ones like household rain gutters, or at least try to avoid aligning the dipole parallel with such conductors. A dipole will provide low take-off angles for good over-the-horizon skip propagation when it is approximately one-half wavelength above the ground.
What does it mean to trim an antenna?
Trimming a dipole antenna refers to the adjustment of antenna length to operating frequency. The total length of the dipole should be just under one-half wavelength for the operating band. (See Shack Talk, Your First Dipole Antenna for information on calculating approximate dipole lengths.)
