	US 12,113,583 B2
	Beamforming device testing
Dennis Rosenauer, Tigard, OR (US); Roger Hayward, Beaverton, OR (US); and Roy Swart, Hillsboro, OR (US)
Assigned to FormFactor, Inc., Livermore, CA (US)
Filed by FormFactor, Inc., Livermore, CA (US)
Filed on Jan. 7, 2021, as Appl. No. 17/143,850.
Claims priority of provisional application 62/958,546, filed on Jan. 8, 2020.
Prior Publication US 2021/0211210 A1, Jul. 8, 2021
Int. Cl. H04B 17/12 (2015.01); H04B 17/16 (2015.01); H04B 17/19 (2015.01); H04B 7/06 (2006.01)

CPC H04B 17/12 (2015.01) [H04B 17/16 (2015.01); H04B 17/19 (2015.01); H04B 7/0617 (2013.01)]

12 Claims

1. An apparatus for electrically testing an electrical device under test, wherein the electrical device under test has N ports, the apparatus comprising:

an N:1 electrical signal network configured to be directly connected to the N ports of the electrical device under test and to provide a single electrical test port;

a test controller configured to control at least the electrical device under test to provide characterization of the electrical device under test;

wherein the characterization uses the single electrical test port as a test input and/or output instead of individually using the N ports of the electrical device under test as test inputs and/or outputs;

wherein the electrical device under test is a beamforming transmitter, and wherein the N:1 electrical signal network is configured as a virtual antenna range such that the single electrical test port provides an output signal from the electrical device under test at a selected far field direction.