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For satellite communication the frequency should be less than critical frequency?
For satllite communication the frequency should not be less than the critical frequency because in satellite communicaton high frequency is needed which is reflected by satellite but not by the ionosphere.
Is microwave media is faster than satellite?
Your communications with a satellite are by the use of microwaves. High frequency em waves.The distance to your local transmitter will most likely be much less than to a satellite, and transit delays will be shorter.The speed of the comms media is essentially at the speed of light - the only difference is the distance.
What are the properties of microwaves that allow them to be used for satellite communications?
Microwaves have properties such as high frequency and short wavelength, which allow them to carry large amounts of data efficiently. Their ability to penetrate the atmosphere with minimal attenuation makes them ideal for long-distance communication, as they are less affected by weather conditions compared to lower-frequency signals. Additionally, microwaves can be easily focused into narrow beams, enabling precise targeting of satellite signals to specific areas on Earth. These characteristics make microwaves highly suitable for satellite communications.
What is local UFH channels?
It means "ultra high frequency" and is a analog channel. It's what you watched on TV before cable or satellite. The other type was vhf or "very high frequency".
What frequency range is from 3 GHz to 30 GHz?
The frequency range from 3 GHz to 30 GHz is classified as the Super High Frequency (SHF) band in the electromagnetic spectrum. This range is commonly used for various applications, including radar, satellite communications, and some wireless communication technologies. It is also part of the microwave range, which is crucial for both commercial and military telecommunications.
What is the down link frequency to earth?
The downlink frequency to Earth, in the context of communication satellites or spacecraft, refers to the frequency at which data is transmitted from the satellite to Earth. The specific frequency used can vary depending on the satellite system and the communication protocol being employed. Generally, downlink frequencies for satellite communication are in the microwave frequency range, typically between 1 to 50 GHz. The choice of downlink frequency is influenced by factors such as transmission range, atmospheric absorption, and regulatory requirements.
Why high frequency is used in communication than low frequency?
High frequency is used because of the the size of antennas used to transmit and receive the communications signal. The higher the frequency the smaller the antenna.
What is up converter in satellite communication?
Every information sent and received through satellite communication has to have an address to enable the communication process of signal delivery and reception. This naming of the signal is made in the form of a specific frequency. For example each TV channel operates on a unique frequency of it's own. When that frequency is called (tuned technically) out of a spectrum in that band, the chosen frequency gets selected. Since satellite transponders operate at very high frequency, modulation of the signal on to the carrier is difficult. Hence modulation is carried out at a much lower frequency. Such modulated signal is raised to the required frequency( name or address as stated above) that supports the satellite band and the transponder. The equipment used to elevate the frequency of the low frequency carrier (known as Intermediate Frequency) to the satellite transponder frequency is UP CONVERTER C.K.Vasudeva Bangalore
Applications of tunnel diode?
Applications: They are used in low power amplifiers DLVA, microwave and RF power monitors, high-frequency triggers, ALC loops, zero bias detectors, ACP tunnel diode circuits, etc. Since they are more resistant to nuclear radiation, tunnel diodes are used in space applications like amplifiers for satellite communications.
What are the military cb's?
CBs, or Citizen's Band radios, are two-way radios that operate on a specific set of frequencies designated for civilian use. They are commonly used by truckers, off-road enthusiasts, and emergency services for communication over short distances. Military entities may also use CB radios for non-sensitive communications in certain situations.
Why must a satellite have a distinct up link and down link frequencies?
These are frequencies used for satellite communications. Usually in the Gigahertz bands. Uplink is on a differenct channel to downlink, to avoid interferece. The Uplink, is the signal sent to the satellite, via a dish antenna, which focuses the signal in the direction of the satellite. On board the satellite, this signal is changed and re-transmitted, on a different frequency (Downlink), and beamed back to earth. This way huge distances can be covered on earth, despite the curvature and with minimal power.
How many frequency bands does the military use?
The military typically uses several frequency bands for various communication, radar, and navigation purposes. These bands can be broadly categorized into low frequency (LF), high frequency (HF), very high frequency (VHF), ultra high frequency (UHF), super high frequency (SHF), and extremely high frequency (EHF). Each band serves different operational needs, with some dedicated to secure communications, while others are used for surveillance and targeting. The exact number of frequency bands may vary based on specific military applications and technology advancements.
