Method and an apparatus for measuring the performance of antennas, mobile phones and other wireless terminals

A portable apparatus for measuring the total radiated power of at least one of mobile and wireless terminals, the terminals including at least both a transmitter and an antenna, the apparatus comprising:

• a chamber, adapted to enclose a terminal to be tested (TUT) and including walls of an inwardly reflective material, adapted to render the walls reflective to electromagnetic waves, thereby simulating a multi-path environment, and including means for obtaining a multitude of mode distributions;
• and
• at least one additional second antenna (SA) arranged in the chamber, and a measuring instrument connected to the SA for measuring the received power at the SA.

A portable apparatus, comprising:

• a chamber, adapted to enclose an antenna to be tested (AUT) and including walls of an inwardly reflective material, adapted to render the walls reflective to electromagnetic waves, thereby simulating a multi-path environment, and including means for obtaining a multitude of mode distributions, wherein the walls include sidewalls, ceiling and floor;
• and
• at least one movable object arranged in the chamber.

A portable apparatus for measuring the radiation efficiency of antennas, comprising:

• a chamber, adapted to enclose an antenna to be tested (AUT) and including walls of an inwardly reflective material, adapted to render the walls reflective to electromagnetic waves, thereby simulating a multi-path environment, and including means for obtaining a multitude of mode distributions;
• and
• at least two movable objects arranged in the chamber, said objects being sequentially movable.

A portable apparatus for measuring the radiation efficiency of antennas, comprising:

• a chamber, adapted to enclose an antenna to be tested (AUT) and including walls of an inwardly reflective material, adapted to render the walls reflective to electromagnetic waves, thereby simulating a multi-path environment, and including means for obtaining a multitude of mode distributions;
• wherein
• the chamber further contains objects for simulating a typical near-in environment for the AUT.

A portable apparatus for measuring the radiation efficiency of antennas, comprising:

• a chamber, adapted to enclose an antenna to be tested (AUT) and including walls of an inwardly reflective material, adapted to render the walls reflective to electromagnetic waves, thereby simulating a multi-path environment, and including means for obtaining a multitude of mode distributions;
• wherein
• the chamber is large enough to provide at least thirty resonant cavity modes inside it within a frequency band of interest.

An apparatus comprising:

• a chamber, adapted to enclose an antenna to be tested (AUT) and including walls of an inwardly reflective material, adapted to render the walls reflective to electromagnetic waves, thereby simulating a multi-path environment, and including means for obtaining a multitude of mode distributions, wherein the walls include sidewalls, ceiling and floor;
• wherein the chamber comprises a window for visual inspection of the interior of the chamber during measurements, the window being made reflective for electromagnetic waves of the measurement frequencies by a grid of conducting wires, where at least two wires run in approximately orthogonal directions.

An apparatus comprising:

• a chamber, adapted to enclose an antenna to be tested (AUT) and including walls of an inwardly reflective material, adapted to render the walls reflective to electromagnetic waves, thereby simulating a multi-path environment, and including means for obtaining a multitude of mode distributions, wherein the walls include sidewalls, ceiling and floor;
• wherein the chamber comprises at least one of a rotate-able and displaceable device to carry the AUT during measurements, so as to move it relative to the multipath waves within the chamber.

An apparatus comprising:

• a chamber, adapted to enclose an antenna to be tested (AUT) and including walls of an inwardly reflective material, adapted to render the walls reflective to electromagnetic waves, thereby simulating a multi-path environment, and including means for obtaining a multitude of mode distributions, wherein the walls include sidewalls, ceiling and floor;
• wherein at least one of the AUT is an adaptive antenna and a TUT is a type of adaptive antenna comprising two uncoupled antenna elements, designed to work together in such a way that the antenna system, in which the adaptive antenna is to be used, combines the signal on the two antennas in an optimum way.

An apparatus for estimating the absorption of electromagnetic radiation in bodies, comprising:

• a chamber, adapted to enclose an antenna to be tested (AUT) and including walls of an inwardly reflective material, adapted to render the walls reflective to electromagnetic waves, thereby simulating a multi-path environment, and including means for obtaining a multitude of mode distributions, wherein the walls include sidewalls, ceiling and floor;
• and
• an apparatus for measuring at least one of the radiation efficiency of antennas and the communication power of at least one of mobile and wireless terminals.

A portable apparatus for measuring the total radiated power of at least one of mobile and wireless terminals, the terminals including at least both a transmitter and an antenna, the apparatus comprising:

• a chamber, adapted to enclose a terminal to be tested (TUT) and including walls of an inwardly reflective material, adapted to render the walls reflective to electromagnetic waves, thereby simulating a multi-path environment, and including means for obtaining a multitude of mode distributions;
• wherein
• the chamber further contains objects for simulating a typical near-in environment for the TUT.