How far apart do HF antennas need to be?
Distances would be between 10-15′ horizontally and 10-15′ vertically.
What are mobile antennas?
Mobile antennas are designed to be used for operation while in motion. Their uses include pedestrian mobile operation while walking, bicycle-mounted antennas for use while riding, and the most common form, automobile-mounted antennas for use while driving.
Is dipole better than vertical?
If cost is your primary consideration, the horizontal dipole is a great choice. All you need is wire, insulators, and some support rope to build this simple antenna. Vertical antennas naturally have a low angle of radiation, meaning you’ll have a good chance of making worldwide contacts.
Do trees interfere with HF antennas?
Trees have little attenuation on HF, and many booming signals on the HF bands come from stations who have antennas in and below tree canopy level. They do start to matter more on VHF, and even more on UHF.
Can antennas be too close together?
Two similar antennas can be ganged together. They must be the same type, same gain and both antenna cables going to the mixer must be the same length. It should give you 3 db of gain extra.
What type of antenna is used in mobile phone?
The most common outer antenna used with mobile phone is helical antenna and the most common used inner antenna type is microstrip patch antenna.
How does a mobile phone antenna work?
An antenna is simply a transducer, typically made of copper, that (when receiving) picks up energy being sent to it and passes that signal on to a radio chipset. That chipset takes this analog signal and turns it into a digital one, which can then be used by the main processor in the device.
Why is there a ball on the end of an antenna?
The ball on the end of an antenna is there to dissipate the static buildup. The air traveling across the ball is at a slightly different speed than the rest of the antenna and that difference of static potential causes the static charge to flow toward the ball where it is dissipated into the airflow.