Microwave Radio Communications and System Gain
MICROWAVE RADIO COMMUNICATIONS AND SYSTEM GAIN (c22 Tomasi)
CHAPTER 24
MICROWAVE RADIO COMMUNICATIONS AND SYSTEM GAIN
1)Electromagnetic waves with frequencies that range from approximately 500 MHz to 300 GHz or more.
Microwaves
2)The wavelengths for microwave frequencies, which is than infrared energy.
1 cm and 60 cm slightly longer
3)The name given to microwave signals, because of their inherently high frequencies, have short wavelengths.
“Microwave” waves
4)Each frequency is divided in half with the lower half identified as the low band and the upper half as narrow band.
Full-Duplex (Two-way)
5)Communications system used to carry information for relatively short distances such as between cities with the same state.
Short Haul
6)Microwave systems that is used to carry information for relatively long distances, such as interstate and backbone route applications.
Long Haul
7)It propagate signals through Earth’s atmosphere between transmitters and receivers often located on top of tower spaced about 15 miles to 30 miles apart.
Microwave Radios
Advantages of Microwave Radio: Radio systems do not require a right-of way acquisition between stations. Each station requires the purchase or lease ofonly a small area of land. Because of their high operating frequencies, microwave radio systems can carry large quantities of information. High frequencies mean short wavelengths, which require relatively small antennas. Radio signals are more easily propagated around physical obstacles such as water and high mountains Fewer repeaters are necessary for amplification. Distances between switching centers are less. Underground facilities are minimized. Minimum delays are introduced. Minimal crosstalk exists between voice channels. Increased reliability and less maintenance are important factors.
Disadvantages of Microwave Radio: It is more difficult to analyze and design circuits at microwave frequencies. Measuring
CHAPTER 24
MICROWAVE RADIO COMMUNICATIONS AND SYSTEM GAIN
1)Electromagnetic waves with frequencies that range from approximately 500 MHz to 300 GHz or more.
Microwaves
2)The wavelengths for microwave frequencies, which is than infrared energy.
1 cm and 60 cm slightly longer
3)The name given to microwave signals, because of their inherently high frequencies, have short wavelengths.
“Microwave” waves
4)Each frequency is divided in half with the lower half identified as the low band and the upper half as narrow band.
Full-Duplex (Two-way)
5)Communications system used to carry information for relatively short distances such as between cities with the same state.
Short Haul
6)Microwave systems that is used to carry information for relatively long distances, such as interstate and backbone route applications.
Long Haul
7)It propagate signals through Earth’s atmosphere between transmitters and receivers often located on top of tower spaced about 15 miles to 30 miles apart.
Microwave Radios
Advantages of Microwave Radio: Radio systems do not require a right-of way acquisition between stations. Each station requires the purchase or lease ofonly a small area of land. Because of their high operating frequencies, microwave radio systems can carry large quantities of information. High frequencies mean short wavelengths, which require relatively small antennas. Radio signals are more easily propagated around physical obstacles such as water and high mountains Fewer repeaters are necessary for amplification. Distances between switching centers are less. Underground facilities are minimized. Minimum delays are introduced. Minimal crosstalk exists between voice channels. Increased reliability and less maintenance are important factors.
Disadvantages of Microwave Radio: It is more difficult to analyze and design circuits at microwave frequencies. Measuring