Patent ID: 8405560

Claim:
An antenna evaluation apparatus including at least one receiving antenna to be evaluated and a plurality of scatterer antennas surrounding the receiving antenna, the antenna evaluation apparatus comprising: a signal generator for generating a radio frequency signal; a divider for dividing the generated radio frequency signal; a phase-shift circuit for adjusting phases of respective distributed radio frequency signals; and a controller for controlling the phase-shift circuit, so as to create a set of multipath waves around the receiving antenna when the adjusted radio frequency signals is respectively radiated from the scatterer antennas, wherein the controller: generates a first set of initial phases and a second set of initial phases, such that a set of multipath waves to be created around the receiving antenna by the radiated radio frequency signals, whose phases are adjusted by the phase-shift circuit to have corresponding initial phases in the first set of initial phases, is different from another set of multipath waves to be created around the receiving antenna by the radiated radio frequency signals, whose phases are adjusted by the phase-shift circuit to have corresponding initial phases in the second set of initial phases; determines a third set of initial phases including arbitrary initial phases, each arbitrary initial phase between a pair of corresponding initial phases in the first set of initial phases and in the second set of initial phases; and adjusts the phases of the radio frequency signals using the phase-shift circuit such that the phases of the radio frequency signals have corresponding initial phases in the third set of initial phases, and makes the adjusted radio frequency signals radiate.