Travelling Is Education in Itself.
MICROWAVE COMMUNICATION-overview
STRUCTURE
1.1 INTRODUCTION
1.2 Objective
1.3 Classification of Electromagnetics wave
1.4 MICROWAVE
1.5 6 GHz Digital M/W SYSTEM
1.6 Summary
1.7 REFERENCES AND SUGGESTED FURTHER READINGS
1 INTRODUCTION
We use the radio portion of the electromagnetic spectrum for many things, including television and radio broadcasting, telephones and other wireless communications, navigation and radar for a variety of measurements including police speed traps, and even microwave cooking ovens.
2 Objective
After reading this unit, you should be able to understand: • Microwave Frequencies • Microwave link Properties • Microwave radio relay • Different Digital radio systems
3 Classification of Electromagnetics wave
Electromagnetic waves can be broadly classified in terms of frequencies along with their uses as follows in Table-1:
Table-1
|RANGE |NAME |WAVELENGTH |USES |
|0–30 KHz |V.L.F. |Up to 10 km. |Used for long communication. Has limited information. Bandwidth |
| | | |requires very high power. |
|30–300 KHz |L.F. |10 km to 1 km | |
|0.3–3 MHz |M.F. |1 km to 100 m |Radio Broadcast, Marine Power in KW, ground wave propagation, i.e. |
| | | |follows the curvature of the Earth. |
|3–30 MHz |H.F. |100 m to 10 m |Long haul point to point communication. Propagation is by one or more|
| | | |reflections
STRUCTURE
1.1 INTRODUCTION
1.2 Objective
1.3 Classification of Electromagnetics wave
1.4 MICROWAVE
1.5 6 GHz Digital M/W SYSTEM
1.6 Summary
1.7 REFERENCES AND SUGGESTED FURTHER READINGS
1 INTRODUCTION
We use the radio portion of the electromagnetic spectrum for many things, including television and radio broadcasting, telephones and other wireless communications, navigation and radar for a variety of measurements including police speed traps, and even microwave cooking ovens.
2 Objective
After reading this unit, you should be able to understand: • Microwave Frequencies • Microwave link Properties • Microwave radio relay • Different Digital radio systems
3 Classification of Electromagnetics wave
Electromagnetic waves can be broadly classified in terms of frequencies along with their uses as follows in Table-1:
Table-1
|RANGE |NAME |WAVELENGTH |USES |
|0–30 KHz |V.L.F. |Up to 10 km. |Used for long communication. Has limited information. Bandwidth |
| | | |requires very high power. |
|30–300 KHz |L.F. |10 km to 1 km | |
|0.3–3 MHz |M.F. |1 km to 100 m |Radio Broadcast, Marine Power in KW, ground wave propagation, i.e. |
| | | |follows the curvature of the Earth. |
|3–30 MHz |H.F. |100 m to 10 m |Long haul point to point communication. Propagation is by one or more|
| | | |reflections
References: AND SUGGESTED FURTHER READINGS • http://en.wikipedia.org/wiki/Microwave • www.eogogics.com/talkgogics/.../microwave-line-of-sight-systems • www.isd.mel.nist.gov/meso_micro/SPIE_Paper_4821-26.pdf • Microwave engineering - David M. Pozar