Test systems with multiple antennas for characterizing over-the-air path loss
First Claim
1. A method for performing wireless testing with a test station during manufacturing, wherein the test station includes a test chamber having a plurality of test chamber antennas, a test unit, and radio-frequency cables that connect the test chamber antennas to the test unit, the method comprising:
- with the test station, testing a device under test by passing radio-frequency signals between a selected one of the test chamber antennas and the device under test while preventing radio-frequency signals from passing between the test chamber antennas other than the selected one of the test chamber antennas and the device under test.
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Accused Products
Abstract
Calibration equipment for calibrating multiple test stations in a test system is provided. Each test station may include a test unit, a test chamber with multiple antennas, and radio-frequency (RF) cables that connect the test unit to the multiple antennas within the test chamber. Reference devices under test (DUTs) may be used to calibrate the OTA path loss of each test station while switching one of the multiple antennas into use one at a time at desired frequencies. A preferred antenna list indicating the preferred antenna that provides the optimal path loss for each desired frequency may be generated. Once calibrated, the test stations may be used during product testing to test factory DUTs to determine whether a particular production DUT satisfies pass/fail criteria. During product testing, a selected one of the multiple antennas is enabled based on the preferred antenna list to perform desired measurements.
8 Citations
24 Claims
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1. A method for performing wireless testing with a test station during manufacturing, wherein the test station includes a test chamber having a plurality of test chamber antennas, a test unit, and radio-frequency cables that connect the test chamber antennas to the test unit, the method comprising:
with the test station, testing a device under test by passing radio-frequency signals between a selected one of the test chamber antennas and the device under test while preventing radio-frequency signals from passing between the test chamber antennas other than the selected one of the test chamber antennas and the device under test. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. A test system that includes a test station, wherein the test station comprises:
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a test host; a test unit that has multiple ports and that is connected to the test host; and a test chamber having a plurality of antennas, wherein the antennas are connected to the test unit and wherein during product testing, the test host directs the test unit to pass radio-frequency signals through a selected one of the multiple ports in the test unit while preventing radio-frequency signals from passing through the ports other than the selected one of the multiple ports in the test unit. - View Dependent Claims (13, 14, 15, 16)
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17. A test system for making wireless measurements on devices under test, wherein the test system includes a wireless test station and wherein the wireless test station comprises:
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a test unit; a test chamber having a plurality of antennas within the test chamber; at least one antenna with which the wireless measurements on the devices under test are made; and a multiplexer circuit coupled between the test unit and the test chamber. - View Dependent Claims (18, 19, 20, 21)
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22. A method of calibrating wireless test equipment that includes a test chamber having a plurality of antennas for wirelessly testing devices under test during manufacturing to determine whether the devices under test are performing satisfactorily, comprising:
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gathering over-the-air path loss measurements for the plurality of antennas at each of a plurality of frequencies by making wireless measurements with the antennas in the test chamber; and determining, for each of the plurality of frequencies, which of the antennas to use in wirelessly testing the devices under test during manufacturing based on the over-the-air path loss measurements. - View Dependent Claims (23)
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24. A method of using wireless test equipment that includes a test chamber having a plurality of antennas to wirelessly test devices under test during manufacturing to determine whether the devices under test are performing satisfactorily, comprising:
with the wireless test equipment, testing the wireless devices under test at each of a plurality of radio-frequency test frequencies by using, for each of the plurality of radio-frequency test frequencies, a selected one of the plurality of antennas based on a preferred antenna list.
Specification