What is a base loaded antenna?
A base loaded antenna has a coil wrapped around the antenna body at the base (bottom). Often all-in-one magnetic mount and room antennas are base loaded. They provide simple mounting and can use thicker coil, which provides a higher Watt capacity.
Are dipole antennas any good?
Dipoles rank among the easiest antennas to build, construct or erect for HF amateur radio bands. Commonly used on bands like 80 meters, 40 meters, 20 meters, 15 meters, and 10 meters, dipoles are very useful and can perform excellently well if erected at a high elevation.
How high does a dipole antenna need to be?
Recommendation. For best results, dipoles should be at least 1/2 wavelength above ground level. For the lower bands, especially 160-40 meters, this can become impractical–place your dipole as high as your situation allows.
What is the use of loading coil in antenna?
A loading coil or load coil is an inductor that is inserted into an electronic circuit to increase its inductance. The term originated in the 19th century for inductors used to prevent signal distortion in long-distance telegraph transmission cables.
Should a dipole antenna be vertical or horizontal?
Dipole antennas are mostly omnidirectional when sending and receiving signals. Dipoles can be hidden in trees, attics, and along roof lines to keep your HOA happy. Though horizontal dipoles are relatively easy to make, they often take some effort to install in trees or on poles and towers.
How do you ground an FM antenna?
Connect the Antenna to Ground To connect the antenna to ground, simply connect the other end of your ground wire to coaxial grounding block. The block will have two female coaxial connectors and a slot to connect your ground wire.
What is the basic design for the FM dipole antenna?
The basic design for the FM dipole antenna is shown below. In the diagram each leg of the dipole antenna is joined to the feeder. This can either be open wire / twin feeder, or coax can be used. Strictly speaking a balun should be used when coax or coaxial cable is used.
Why add inductors to a dipole antenna?
Adding inductors to your dipole makes it possible to reduce the overall length of the antenna. The loaded dipole opens up the options for many armature radio users faced with space constraints.
How to reduce the length of an HF dipole antenna?
However, there is a way to reduce the overall length of an HF dipole through the use of loading coils. Adding inductors to your dipole makes it possible to reduce the overall length of the antenna. The loaded dipole opens up the options for many armature radio users faced with space constraints.
What is a 40 meter loaded dipole?
The loaded dipole opens up the options for many armature radio users faced with space constraints. Below is one example of how to build and mount a 40 meter loaded dipole using basic materials.