System for field testing wireless devices with reduced multipath interference

摘要

A portable test chamber with an open top may serve as a field testing apparatus for wireless testing of electronic devices. A wireless device under test may be mounted within a cavity in the test chamber. The cavity may be surrounded by a dielectric lining of anechoic material. A layer of electromagnetic shielding such as metal foil may cover the outer surfaces of the dielectric lining. The chamber may have a box shape with a rectangular opening at its top. Satellite navigation system signals or other wireless signals may be received through the opening at the top of the test chamber during testing. The electromagnetic shielding may reduce the effects of multipath interference during field tests.

主权项

1. A field test apparatus within which a wireless device under test is tested outdoors, comprising:
a dielectric layer that surrounds a cavity in which the device under test is located; an electromagnetic shielding layer that covers the dielectric layer, wherein the electromagnetic shielding layer and the dielectric layer have an opening through radio-frequency signals pass to reach the device under test during field testing; a control unit; movable structures that are moved to adjust a field test apparatus parameter selected from the group consisting of: angle of acceptance for radio-frequency signals passing through the opening to the device under test, size of the opening, and position of the device under test within the cavity; and at least one actuator that moves the movable structures under control by the control unit to adjust the field test apparatus parameter.