Electromagnetic Field Theory
The transmitting antennas for lower frequencies (below 500 kHz) are generally

Horizontal suspended wire type
Parabolic reflector type
Vertical grounded wire type
Any of the above

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Electromagnetic Field Theory
In microwave communication links, when fading due to rain attenuation occurs then technique adopted for solving the problem would include

Amplitude timing and phase correction
Antenna replacement and feed correction
Polarization shifting and code diversity
Path diversity and frequency diversity

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