Radio frequency bands pdf
Radio frequency bands are the specific ranges of frequencies that are used for radio communication. Different bands have different purposes, and different countries use different bands for their own radio communication.
The electromagnetic spectrum is the range of all possible frequencies of electromagnetic radiation. The lower end of the spectrum is composed of radio frequencies, while the higher end of the spectrum is composed of light frequencies.
Radio frequency bands are divided into a number of different categories, based on their purpose. The most common categories are broadcast, military, cellular, and satellite.
Broadcast frequencies are used for communicating with the public, and can be used for both radio and television. The frequencies in this band range from about 3 MHz to 30 MHz.
Military frequencies are used by the military for communication purposes. This band ranges from about 30 MHz to 300 MHz.
Cellular frequencies are used for cellular communication, and range from about 700 MHz to 2.6 GHz.
Satellite frequencies are used for satellite communication, and range from about 1.5 GHz to 30 GHz.
Each country has its own set of frequencies that it uses for radio communication. In the United States, the Federal Communications Commission (FCC) regulates the use of radio frequencies.
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How many radio frequency bands are there?
There are a lot of different radio frequency bands out there, and it can be hard to keep track of them all. In the United States, there are three bands that are most commonly used: the AM band, the FM band, and the digital TV band.
The AM band is the oldest type of radio band, and it was first used back in the 1920s. It’s used for transmitting audio signals, and the frequency range is typically between 540 kHz and 1.6 MHz.
The FM band is used for transmitting audio and video signals, and it was first used in the 1940s. The frequency range is typically between 88 MHz and 108 MHz.
The digital TV band is used for transmitting digital TV signals, and it was first used in the 1990s. The frequency range is typically between 174 MHz and 216 MHz.
What is FCC frequency?
The Federal Communications Commission (FCC) is an independent agency of the United States government created by statute in 1934. The FCC is responsible for regulating interstate and international communications by radio, television, wire, satellite, and cable. The FCC’s jurisdiction covers the 50 states, the District of Columbia, and U.S. possessions and territories.
The FCC assigns frequencies and regulates their use in the United States. The FCC also licenses and regulates commercial radio and television stations, cable TV systems, satellite TV services, and wireless microphone operations.
The FCC’s primary mission is to “promote the deployment of broadband to all Americans and to preserve a free and open internet.”
The FCC’s frequency allocation chart is a public document that shows the specific frequencies and bandwidths that have been allocated for specific uses.
The FCC’s rules for using specific frequencies are published in Title 47 of the Code of Federal Regulations (CFR).
Some of the most common FCC frequencies are:
– MHz: This is the frequency range for FM radio.
– kHz: This is the frequency range for AM radio.
– GHz: This is the frequency range for cellular phones, wireless networks, and satellite communications.
– kHz: This is the frequency range for submarine communications.
– kHz: This is the frequency range for air traffic control.
– kHz: This is the frequency range for maritime communications.
What band is 300 MHz?
300 MHz is a frequency band used for various purposes including radio and television broadcasting, wireless communication, and radar. The 300 MHz band is in the VHF range of frequencies, which means it is located below the frequencies used for cell phones and other wireless devices.
The 300 MHz band is divided into several segments, each of which is used for different purposes. The 300-308 MHz segment is used for FM radio broadcasting, while the 309-316 MHz segment is used for digital audio broadcasting. The 317-331 MHz segment is used for television broadcasting, and the 332-348 MHz segment is used for wireless communication. The 349-366 MHz segment is used for radar, and the 367-374 MHz segment is used for satellite communication.
The 300 MHz band is generally not used for cell phone service, as the frequencies are too low for good coverage. However, there are a few exceptions, as some cell phone providers have started using the 300 MHz band in certain areas.
300 MHz is a relatively low frequency, and as a result, it has a number of advantages over higher frequency bands. First, it travels further and can penetrate buildings and other obstacles better than higher frequency bands. Second, it has a larger coverage area than higher frequency bands. Third, it is less affected by interference than higher frequency bands.
Overall, the 300 MHz band is a useful frequency range for a variety of purposes. It has good range and coverage, and is less affected by interference than other frequencies.
How are frequency bands allocated?
How are frequency bands allocated?
Radio frequency bands are allocated by the Federal Communications Commission (FCC) in the United States and similar agencies in other countries. The FCC divides the radio spectrum into frequency bands and assigns different uses to each band.
The bands are allocated to different services based on the needs of those services. For example, the FCC has allocated the Very High Frequency (VHF) band to broadcast television, while the Ultra High Frequency (UHF) band is allocated to cellular telephone service.
The FCC also assigns different frequencies within each band to different users. For example, the VHF band is allocated from 54 MHz to 216 MHz, and the FCC has assigned frequencies of 54 MHz, 88 MHz, and 108 MHz to broadcast television, while frequencies of 174 MHz and 220 MHz are allocated to cellular telephone service.
The FCC also regulates the power levels and other technical parameters of the different services to ensure that they do not interfere with each other.
How are radio bands calculated?
Radio frequency bands are calculated in terms of hertz or kilohertz. A hertz is a unit of frequency equal to one cycle per second, while a kilohertz is 1,000 hertz. The higher the hertz number, the higher the frequency of the radio wave.
The three main bands used for radio transmissions are the AM band, the FM band and the shortwave band. The AM band is from 530 kHz to 1,710 kHz, the FM band is from 88 MHz to 108 MHz, and the shortwave band is from 2.3 MHz to 26.1 MHz.
There are other bands used for specific purposes, such as the VHF band (very high frequency), which is from 30 MHz to 300 MHz, and the UHF band (ultra high frequency), which is from 300 MHz to 3,000 MHz.
The frequency of a radio wave is what determines its band. Radio waves with a frequency of 530 kHz to 1,710 kHz are in the AM band, radio waves with a frequency of 88 MHz to 108 MHz are in the FM band, and radio waves with a frequency of 2.3 MHz to 26.1 MHz are in the shortwave band.
What are common radio frequencies?
There are many different radio frequencies that are used for a variety of reasons. Understanding the different frequencies and what they are used for can be helpful for radio enthusiasts and those who work with radios on a regular basis.
The most common radio frequency is the AM frequency. This frequency is used for broadcasting and is found in the AM band on the radio spectrum. The AM frequency is between 540 kHz and 1,600 kHz.
Another common radio frequency is the FM frequency. This frequency is used for broadcasting and is found in the FM band on the radio spectrum. The FM frequency is between 88 MHz and 108 MHz.
There are also a variety of military frequencies that are used for communication purposes. Some of these frequencies include the HF frequency, the VHF frequency, and the UHF frequency.
The HF frequency is the frequency range between 3 MHz and 30 MHz. This frequency is used for long-range communication and is often used by the military.
The VHF frequency is the frequency range between 30 MHz and 300 MHz. This frequency is used for short-range communication and is often used by the military.
The UHF frequency is the frequency range between 300 MHz and 3 GHz. This frequency is used for short-range communication and is often used by the military.
There are also a variety of other frequencies that are used for various purposes. These frequencies include the CB frequency, the satellite frequency, and the GPS frequency.
The CB frequency is the frequency range between 27 MHz and 28 MHz. This frequency is used for communication purposes and is often used by truckers and motorists.
The satellite frequency is the frequency range between 2 GHz and 2.5 GHz. This frequency is used for communication purposes and is often used by satellite companies.
The GPS frequency is the frequency range between 1575.42 MHz and 1592.58 MHz. This frequency is used for communication purposes and is often used by GPS companies.
What is C band used for?
What is C band used for?
C band is used for satellite communications, including satellite television, satellite radio, and satellite Internet service.
C band is in the microwave part of the electromagnetic spectrum. It has a frequency range of 3.7 to 7.3 gigahertz. This makes it a good choice for satellite communications, because the higher frequencies can travel through the atmosphere better than lower frequencies.
C band is also used for terrestrial microwave communications. This is a type of wireless communication that uses high-frequency radio waves to provide voice, data, and video signals over a wide area.