Microwaves are electromagnetic waves whose frequencies range from 1 GHz to 1000GHz.micro refers to tinyness,and tinyness referring to the wavelength.
Advantages of microwaves:
Advantages of microwaves:
- Increased bandwidth availability: mucrowaves have large bandwidths compared to common bands like MW SW and UHF waves.The advantage of large bandwidth is the frequency range of information channels will be a small percentage of the carrier frequency and more information can be transmitted in microwave frequency ranges.
- Microwave region is very useful since the lower band of frequency is already crowded.and in present day digital modulation schemes also require higher bandwidth.
- power requirements are low at microwave frequencies compared to other short waves.
- Improved directive properties:as frequency increases,directivity increases and beamwidth decreases hence antenna size is small for microwave frequencies.
- high gain and directive antennas can be designed and fabricated more easily at microwave frequencies.
- less fading effect and hence more reliable.
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