Radiation Resistance and Antenna Efficiency

Radiation resistance is instead calculated by computing the __________________ of the antenna, the power flux (Poynting vector) at each angle, for a given antenna current

• far-field radiation pattern

• near-field radiation pattern

From_____________, Radiation Resistance Rr is equal to the total power, Prad, radiated as radio waves by the antenna divided by the square of the rms current I2rms into the antenna terminals

• Joule's Law

• Charle's Law

• Boyle's Law

The radiation resistance Rr can be defined as the value of resistance that would ________ the same amount of power is radiated as radio waves by the antenna with the antenna input current passing through it

• dissipate

• grow

Since Antenna Efficiency is a ratio, the number is between 0 and 1

• True

• false

Radiation resistance depends upon

• Configuration of the antenna

• Ratio of length to diameter of the conductor that is being used in the antenna,

• Point where Radiation resistance is considered,

• Location of antenna with respect to ground and other objects

• Corona Discharge

All of the following are types of Antenna Except

• Loop

• diope

• Stub

• antenna gain

Radiation Resistance is determined by the __________ where loss resistance is primarily determined by the materials that is comprised of.

• geometry of the antenna

• Distance from the ground

• corona discharge

Energy lost by radiation resistance is converted to ___________.

• electromagnetic radiation

• Electric power

A ____________ _____________ will collect electrical signals from a transmission line and converts them into radio waves whereas

• Transmitting Antenna

• Radiating Antenna

A __________ ____________ accepts radio waves from the space and converts them to electrical signals and gives them to a transmission line

• Receiving Antenna

• Transmitting Antenna