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Why is the height a vhf radio antenna important?
VHF signals are essentially Line of sight transmissions (LOS). Like all radio waves they are attenuated by objects in their path. Raising the aerial above the level of the interferring objects while still maintaining an integral waveform (Usually using an artificial ground plane or aerials less than 1/2 lambna), reduces the attenuation and prevents distortion of the polarization pattern thus leading to an efficient transmission path.
Why is height of the VHF radio antenna important?
VHF radios work by the line of sight principle
What uses radio waves to transmitt data signals over short distance and is hampered by needing a direct line of sight?
bluetooth
What uses radio waves to transmit data signals over short distances and does not need a direct line of sight?
WiFi modems, highway toll transponders, and Bluetooth® thingies do that.
What uses radio waves to tansmit data signals over short distances and does not need a direct line of sight?
When you ask somebody to pick out the correct answer for you from a list, it would be just plain common courtesy to let him see the list.
Why is the Height of VHF radio important?
Because VHF signals have a line of sight limitation.
Why is the height a vhf radio antenna important?
VHF signals are essentially Line of sight transmissions (LOS). Like all radio waves they are attenuated by objects in their path. Raising the aerial above the level of the interferring objects while still maintaining an integral waveform (Usually using an artificial ground plane or aerials less than 1/2 lambna), reduces the attenuation and prevents distortion of the polarization pattern thus leading to an efficient transmission path.
Why is height of the VHF radio antenna important?
VHF radios work by the line of sight principle
What is an RF remote?
An RF remote is a remote control device that uses radio frequency (RF) signals to communicate with and control electronic devices. RF remotes do not require a direct line of sight to the device being controlled, unlike infrared (IR) remotes which do. They are commonly used in situations where the controlled device is not in the line of sight of the user.
What uses radio waves to transmitt data signals over short distance and is hampered by needing a direct line of sight?
bluetooth
Can Hawaii radio 105.1 be heard on a shortwave radio in California?
No - they're on entirely different wavelengths. 105.1 is VHF radio, which penetrates through the ionosphere, and creates a line-of-sight limitation. Shortwave receives Medium- and High Frequency transmissions from 1.8 to 30 MHz - well below the range of VHF radio.
Why is the heights of a VHF radio antenna important?
VHF signals are essentially Line of sight transmissions (LOS). Like all radio waves they are attenuated by objects in their path. Raising the aerial above the level of the interferring objects while still maintaining an integral waveform (Usually using an artificial ground plane or aerials less than 1/2 lambna), reduces the attenuation and prevents distortion of the polarization pattern thus leading to an efficient transmission path.
Which atmosphere layer contains electrically charged particles that radio waves?
The ionosphere. To clarify, only the low-frequency radio waves incorrectly called "high-frequency" or "HF" of about 50MHz and below are reflected. "Very High Frequency" VHF signals are not reflected, but go straight off into space. For example, in the "AM" commercial broadcast spectrum, the transmission is reflected back to the Earth and is receivable for great distances, a phenomenon that used to be called "skip". AM signals are in the band of 550KHZ to 1.6 MHz. "FM" stations in the band from 88MHz to 108MHz are only received by "Line of sight" transmissions.
What uses radio waves to transmit data signals over short distances and does not need a direct line of sight?
WiFi modems, highway toll transponders, and Bluetooth® thingies do that.
Why is the area of coverage for AM radio greater than FM radio?
The basic reason is that AM radio is broadcast on a lower frequency, while FM is broadcast on a higher frequency. And the lower frequency signals will curve around the earth a bit more than the higher frequency FM signals. FM is considered more "line of sight" than AM, which has that "fat" ground wave that hugs the earth a bit more.
Is sight a voluntary or involuntary system?
Sight is an involuntary system as it does not require conscious effort to function. The eyes automatically process visual information and send signals to the brain without conscious control. However, we can voluntarily choose to focus our attention on specific objects or details in our visual field.
What systems sends out electrical signals in response to sight or sound?
nervous system
