Antenna apparatus and measurement method
AssigneeAnritsu Corporation
InventorsTomohiko Maruo, Aya Yamamoto
Life of this patent
Estimating the term…
Abstract
An measurement apparatus (antenna apparatus) 1 includes: an OTA chamber 50 having an internal space 51 that is not influenced by the surrounding radio wave environment; a reflector 7 that is housed in the internal space 51, radio signals transmitted or received by an antenna 110 of a DUT 100 being reflected through a paraboloid of revolution; a plurality of test antennas 6 that use radio signals in a plurality of measurement target frequency bands for measuring the transmission and reception characteristics of the DUT 100; and automatic antenna arrangement means 60 for sequentially arranging each of the test antennas 6 at a focal position F, which is determined from the paraboloid of revolution, according to the measurement target frequency bands.
Claims20
An antenna apparatus, comprising:
- an anechoic box having an internal space that is not influenced by a surrounding radio wave environment;
- a reflector that is housed in the internal space and has a predetermined paraboloid of revolution, radio signals transmitted or received by an antenna to be tested of a device under test being reflected through the paraboloid of revolution;
- a plurality of antennas corresponding to radio signals in a plurality of measurement target frequency bands for measuring transmission and reception characteristics of the device under test;
- and
- antenna arrangement means configured to sequentially change an arrangement of the plurality of antennas at a focal position, which is determined from the paraboloid of revolution, according to the measurement target frequency bands.
A measurement method using an antenna apparatus that includes an anechoic box having an internal space that is not influenced by a surrounding radio wave environment, a reflector that is housed in the internal space and has a predetermined paraboloid of revolution, radio signals transmitted or received by an antenna to be tested of a device under test being reflected through the paraboloid of revolution, a plurality of antennas corresponding to radio signals in a plurality of measurement target frequency bands for measuring transmission and reception characteristics of the device under test, and antenna arrangement means for sequentially arranging the plurality of antennas at a focal position, which is determined from the paraboloid of revolution, according to the measurement target frequency bands, the method comprising:
- a holding step of holding the device under test in a device under test holding unit in the anechoic box;
- an antenna arrangement step of sequentially arranging the plurality of antennas at the focal position according to the measurement target frequency bands based on a predetermined measurement start command;
- a test signal output step of causing a simulation measurement device to output a test signal to the device under test through the antenna arranged at the focal position;
- a signal receiving step of receiving a measurement target signal, which is output from the device under test to which the test signal has been input, through the antenna arranged at the focal position;
- and
- a measurement step of measuring transmission and reception characteristics of the device under test for a radio signal in the measurement target frequency band, which is used by the antenna arranged at the focal position, based on the measurement target signal received in the signal receiving step.
Dependencies are inferred from the claim text.