Objects that either reflect or diffuse light that falls
A transmission line that has no standing waves of
current or voltage.
The imaginary line perpendicular to the point at which
the incident wave strikes the reflecting surface. Also
called the perpendicular.
On a polar-coordinate graph, the area that represents
Transmitting in all directions.
A type of substance that does not transmit any light
A transmission line that has an infinitely large
The most practical operating frequency that can be used
with the least amount of problems; roughly 85 percent
of the maximum usable frequency.
The point on a graph where the vertical and horizontal
axes cross each other.
The end of a transmission line that is opposite the
transmission line and its source.
A type of transmission line consisting of two parallel
An array that has one or more parasitic elements.
The passive element of an antenna array that is
connected to neither the transmission line nor the
The amount of time required for completion of one full
A term used to describe the frequency of a sound heard
by the human ear.