Atmospheric Propagation
Final layer of earths atmosphere.Very thin yet extends approximately halfway to the moon.
What is the Exosphere?
The process where a wave changes its direction because it entered a media that has a different speed of light.
What is Refraction
Ray that is incident along a path parallel to the optic axis and is reflected through the focal point.
What is Parallel Ray
Antenna that can transmit and receive on same device.
What is Monostatic?
Constructed of two insulated conductors twisted together to form a flexible line. Used for low frequency and low power.
What is twisted pair?
Area of space around earth that is controlled by its magnetic field. Prevents most of the particles from the sun, carried in the solar wind, from hitting earth.
What is Magnetosphere?
An imaginary line drawn perpendicular to the surface.
What is the normal?
Ray that passes through the focal point and is reflected parallel to the optic axis.
What is Focal Ray?
The ability of an antenna to be used for transmission and reception.
Antenna Reciprocity?
Two conductors kept the same distance from each other by means of spacers or spreaders. Used for high frequency and power.
What is Open Two-Wire?
Daily Double
5 layers of the Atmosphere.
What is Troposphere, Stratosphere, Mesosphere, Thermosphere, and Exosphere?
Is a measure of the angle of outgoing light with respect to the normal of the surface.
What is Reflected Angle?
Images created when light rays converge and pass through the image point.
What is Real Image?
The travel of electromagnetic waves through a medium.
What is Propagation?
This loss increases with length of the line. Same effect as adding resistors in series.
What is Copper Loss?
Guided by earths magnetic field a doughnut shaped surface generated by a circle rotating around an axis.
What is the Plasma-sphere.
The measure of the angle of incoming light with the respect to the normal of the surface.
What is the Incident Angle
Type of images created by convex Mirrors.
What is Virtual Image.
Waves refracted off the ionosphere back towards earth. Makes round the world communication possible.
What is Sky Waves?
Loss due to a portion of energy being radiated into space. Loss directly proportional to frequency and power.
What is Radiation Loss?
3 Layers of Ionospheric Regions.
D region, E region, and F region
Theory when a wave enters a medium that is more optically dense, it slows, and the wave fronts are bent or refracted.
What is Huygens Principle?
Lens that has concave surface and a convex surface is thinner along its periphery.
What is Convex Meniscus?
Type of antenna that radiates energy in one direction more than another. EX: Flashlight
What is Directional(anisotropic, radiation)?
Loss as heat is dissipated through the insulation of a transmission line.
Dielectric loss(Capacitive)?