1、WAVE PROPAGATION
Transverse waves
Terms used in wave motion
Characteristics of wave motion
Refraction
Sound waves
Elasticity and density and velocity of transmission
Light waves
Speed of Light
Electric Field
Combined Electric and Magnetic Fields
Summary
Answers
2、Radio wave propagation
Radio Waves
Polarization
The effect of the earth's atmosphere on radio waves
Sky Wave
Refraction in the ionosphere
Skip Distance/Skip Zone
Transmission Losses
Variations in the Ionosphere
Frequency selection considerations
Weather versus propagation
Tropospheric propagation
Summary
Answers
3、Principles of transmission lines
Types of transmission mediums
Losses in transmission lines
Length of a transmission line
Leakage Current
Characteristic Impedance and the Infinite Line
Voltage change along a transmission line
Velocity of wave propagation
Reflections on a transmission line
Reflections of AC voltage from a short circuit
Terminating a transmission line
Standing waves on a transmission line
Summary
Answers
4、Antennas
Radiation of electromagnetic energy
Antenna characteristics
Polarization Requirements for Various Frequencies
Radiation resistance
Polar-coordinate graph for anisotropic radiator
Methods of Feeding Energy to an Antenna
Folded dipole
Array antennas
Directional arrays
Broadside arrays
End-Fire arrays
Parasitic arrays
Multielement Parasitic Array
Special Antennas
Rhombic antennas
RF safety precautions
RF Burns
Summary
Answers
【文件名】:061022@52RD_Introduction.rar
【格 式】:rar
【大 小】:1433K
【简 介】:
【目 录】:
[UseMoney=1]
[/UseMoney]
[此贴子已经被作者于2006-10-22 14:02:43编辑过] |