US 12,259,426 B2
Over the air test chamber with optimized air circulation
Ralf Meissner, Gilching (DE); Markus Herbrig, Grafing b. München (DE); Stefan Schoetz, Kollnburg (DE); Constantin Sinn, Munich (DE); and Christian Aichinger, St. Englmar (DE)
Assigned to Rohde & Schwarz GmbH & Co. KG, Munich (DE)
Filed by Rohde & Schwarz GmbH & Co. KG, Munich (DE)
Filed on Feb. 22, 2022, as Appl. No. 17/677,928.
Prior Publication US 2023/0266383 A1, Aug. 24, 2023
Int. Cl. G01R 31/28 (2006.01); G01R 29/10 (2006.01); G01R 31/302 (2006.01)
CPC G01R 31/2874 (2013.01) [G01R 29/105 (2013.01); G01R 31/3025 (2013.01)] 20 Claims
OG exemplary drawing
 
1. An over the air, OTA, test chamber for testing at least one device under test, DUT, provided within the OTA test chamber which includes a thermal bubble component adapted to receive the device under test, DUT, wherein the thermal bubble component comprises:
an air inlet adapted to supply air into the thermal bubble component,
an air outlet adapted to remove air from the thermal bubble component and
an airstream diffusor provided at the air inlet and adapted to diffuse an airstream supplied by the air inlet within the thermal bubble component, wherein a rotatable hollow cable mast is attached to a rotatable DUT positioner housed by a bottom shell of the thermal bubble and is used to conduct cables through the hollow cable mast to provide an RF connection between the device under test, DUT, held by the DUT positioner and external measurement instruments, wherein the hollow cable mast can be rotated during a testing procedure.