Over-the-air measurement system

Patent metadata

Field	Value
Publication number	US-12040522-B2
Application number	US-202117505369-A
Country	US
Kind code	B2
Filing date	Oct 19, 2021
Priority date	Oct 19, 2021
Publication date	Jul 16, 2024
Grant date	Jul 16, 2024

Abstract

The present disclosure provides an over-the-air measurement system for testing a device under test. The over-the-air measurement system includes an orthomode transducer (OMT) assembly having several separately formed orthomode transducer components that form at least two orthomode transducers. The orthomode transducer assembly has at least two output interfaces for feed antennas. Each of the at least two output interfaces is connected with one dedicated orthomode transducer. Two input interfaces are associated with each of the orthomode transducers. Each of the input interfaces merge into a corresponding waveguide transition that ends up in the respective orthomode transducer that is associated with the corresponding input interface. The several orthomode transducer components are stacked together linearly.

First claim

The embodiments of the invention in which an exclusive property or privilege is claimed are defined as follows:

1. An over-the-air measurement system for testing a device under test, wherein the over-the-air measurement system comprises an orthomode transducer (OMT) assembly having several separately formed orthomode transducer components that form at least two orthomode transducers, wherein the orthomode transducer assembly has at least two output interfaces for feed antennas, wherein each of the at least two output interfaces is connected with one dedicated orthomode transducer, wherein two input interfaces are associated with each of the orthomode transducers, wherein each of the input interfaces merge into a corresponding waveguide transition that ends up in the respective orthomode transducer that is associated with the corresponding input interface, and wherein the several orthomode transducer components are stacked together linearly,
wherein neighbored orthomode transducer components face each other via corresponding contact sides, and wherein the corresponding contact sides of the neighbored orthomode transducer components have structured sections that together form one of the at least two orthomode transducers, and/or
wherein the orthomode transducer assembly comprises 2×N−(N−1) separately formed orthomode transducer components, wherein N corresponds to the number of orthomode transducers.

2. The over-the-air measurement system according to claim 1 , wherein the several orthomode transducer components are orientated with respect to each other such that two straight waveguide transitions are provided, which both end up in the same orthomode transducer.

3. The over-the-air measurement system according to claim 1 , wherein the several orthomode transducer components are orientated with respect to each other such that one straight waveguide transition and an angled waveguide transition are provided, which both end up in the same orthomode transducer.

4. The over-the-air measurement system according to claim 3 , wherein the angled waveguide transition comprises a section having a 90° angle.

5. The over-the-air measurement system according to claim 1 , wherein at least two feed antennas are provided that are connected with the at least two output interfaces of the orthomode transducer assembly, respectively.

6. The over-the-air measurement system according to claim 1 , wherein at least two waveguides are provided that are connected with the at least two input interfaces of the orthomode transducer assembly, respectively.

7. The over-the-air measurement system according to claim 1 , wherein the over-the-air measurement system comprises at least one reflector.

8. The over-the-air measurement system according to claim 7 , wherein the orthomode transducer assembly is orientated with respect to the at least one reflector such that at least two feed antennas connected with the orthomode transducer assembly are directed towards the at least one reflector.

9. The over-the-air measurement system according to claim 7 , wherein at least two feed antennas are provided that are connected with the at least two output interfaces of the orthomode transducer assembly respectively, and wherein one of the at least two feed antennas is substantially located at the focal point of the at least one reflector.

10. The over-the-air measurement system according to claim 1 , wherein the over-the-air measurement system comprises at least two reflectors, wherein a first reflector of the at least two reflectors is a main reflector established as a paraboloid reflector, and wherein a second reflector of the at least two reflectors is a sub-reflector established as a non-paraboloid reflector.

11. The over-the-air measurement system according to claim 1 , wherein the over-the-air measurement system comprises an RF-shielded chamber that accommodates the orthomode transducer assembly.

12. The over-the-air measurement system according to claim 1 , wherein the over-the-air measurement system comprises a measurement equipment that is connected with the orthomode transducer assembly.

13. The over-the-air measurement system according to claim 1 , wherein the over-the-air measurement system comprises a positioner system for the device under test.

14. The over-the-air measurement system according to claim 1 , wherein the orthomode transducer assembly comprises three orthomode transducers.

15. The over-the-air measurement system according to claim 14 , wherein a first of the three orthomode transducers is assigned to a frequency range from 24 GHz up to 42 GHz, wherein a second of the three orthomode transducers is assigned to a frequency range from 35 GHz up to 60 GHz, and wherein a third of the three orthomode transducers is assigned to a frequency range from 60 GHz up to 90 GHz.

16. An over-the-air measurement system for testing a device under test, wherein the over-the-air measurement system comprises an orthomode transducer assembly having several separately formed orthomode transducer components that form at least two orthomode transducers, wherein the orthomode transducer assembly has at least two output interfaces for feed antennas, wherein each of the at least two output interfaces is connected with one dedicated orthomode transducer, wherein two input interfaces are associated with each of the orthomode transducers, wherein each of the input interfaces merge into a corresponding waveguide transition that ends up in the respective orthomode transducer that is associated with the corresponding input interface, wherein the at least two output interfaces are located at a common side surface of the orthomode transducer assembly, and wherein the common side surface is planar.

17. An over-the-air measurement system for testing a device under test, wherein the over-the-air measurement system comprises an orthomode transducer assembly having several separately formed orthomode transducer components that form at least two orthomode transducers, wherein the orthomode transducer assembly has at least two output interfaces for feed antennas, wherein each of the at least two output interfaces is connected with one dedicated orthomode transducer, wherein two input interfaces are associated with each of the orthomode transducers, wherein each of the input interfaces merge into a corresponding waveguide transition that ends up in the respective orthomode transducer that is associated with the corresponding input interface, and wherein the at least two output interfaces are arranged with respect to each other such that an antenna phase center separation is below 2 centimeters.

Assignees

• Rohde & Schwarz

Inventors

• Raith Andreas
• Uhrmann Andreas
• Rowell Corbett

Classifications

• H01Q19/17

  the primary radiating source comprising two or more radiating elements (H01Q19/15, H01Q25/00 take precedence) · CPC title

• G01R29/105

  using anechoic chambers; Chambers or open field sites used therefor (test sites used for measuring on other objects than aerials G01R29/0828; wave absorbing devices H01Q17/00) · CPC title

• H01P1/161 Primary

  sustaining two independent orthogonal modes, e.g. orthomode transducer {(combining or separating polarisations and frequencies H01P1/2131)} · CPC title

• G01R29/0864 Primary

  characterised by constructional or functional features · CPC title