Calibration system and interfacing method with a port calibration unit for each port
A calibration system for a measurement application device is described where the calibration system includes a port calibration unit for each one of at least two ports of the measurement application device, and a central switching unit that includes an input port for each one of the port calibration units and controllably couples at least two of the input ports to each other in pairs. Moreover, each one of the port calibration units includes a device coupling port for coupling the respective port calibration unit to the respective port of the measurement application device, and a central coupling port for coupling the respective port calibration unit to the respective input port of the central switching unit. Also, each one of the port calibration units includes a calibration section, and a switching section. The present disclosure further provides a respective method.
1 . A calibration system for a measurement application device, the calibration system comprising:
a port calibration unit for each one of at least two ports of the measurement application device; and
a central switching unit that comprises an input port for each one of the port calibration units and controllably couples at least two of the input ports to each other;
wherein each one of the port calibration units comprises a device coupling port for coupling the respective port calibration unit to the respective port of the measurement application device, and a central coupling port for coupling the respective port calibration unit to the respective input port of the central switching unit; and
wherein each one of the port calibration units comprises a calibration section that comprises at least three calibration standards, and a switching section for controllably coupling the device coupling port of the respective port calibration unit or the central coupling port of the respective port calibration unit to one of the at least three calibration standards, or for coupling the device coupling port of the respective port calibration unit to the central coupling port of the respective port calibration unit.
2 . The calibration system according to claim 1 , wherein the central switching unit comprises a ring structure with a port coupling for each one of the input ports, wherein each one of the input ports is coupled to a respective one of the port couplings of the ring structure.
3 . The calibration system according to claim 2 , wherein the ring structure comprises a ring switching element between each two of the port couplings for controllably closing or opening the ring structure between the respective port couplings.
4 . The calibration system according to claim 2 , wherein the central switching unit comprises a port switching element between each one of the port couplings and the respective input port for controllably coupling the respective input port to the respective port coupling or decoupling the respective input port from the respective port coupling.
5 . The calibration system according to claim 1 , wherein the port calibration units and the central switching unit are provided as dedicated circuit elements at least one of on separate substrates and coupled to each other by cables, or on the same substrate and coupled to each other by traces provided on the substrate.
6 . The calibration system according to claim 1 , wherein the port calibration units and the central switching unit are provided in a single element.
7 . The calibration system according to claim 6 , wherein the single element comprises a Monolithic Microwave Integrated Circuit.
8 . The calibration system according to claim 7 , wherein the Monolithic Microwave Integrated Circuit comprises a rectangular shape, and wherein the central switching unit is provided in a center of the rectangular shape, and wherein the port calibration units are provided in corners of the rectangular shape or on sides of the rectangular shape.
9 . The calibration system according to claim 1 , wherein the at least three calibration standards comprise at least one of an open calibration standard, a short calibration standard, a match calibration standard, or a high reflection calibration standard.
10 . The calibration system according to claim 1 , further comprising a controller that controls at least one of the port calibration units, and the central switching unit.
11 . An interfacing method for a measurement application device, the interfacing method comprising:
coupling a dedicated port calibration unit to each one of at least two ports of the measurement application device; and
controllably coupling two port calibration units to each other via a central switching unit that comprises an input port for each one of the port calibration units,
wherein each one of the port calibration units comprises a device coupling port that couples the respective port calibration unit to the respective port of the measurement application device, and a central coupling port that couples the respective port calibration unit to the respective input port of the central switching unit, and
wherein each one of the port calibration units comprises a calibration section that comprises at least three calibration standards, and a switching section that controllably couples the device coupling port of the respective port calibration unit or the central coupling port of the respective port calibration unit to one of the at least three calibration standards, or that couples the device coupling port of the respective port calibration unit to the central coupling port of the respective port calibration unit.
12 . The interfacing method according to claim 11 , wherein controllably coupling at least two of the input ports to each other is performed with a ring structure in the central switching unit, wherein the ring structure comprises a port coupling for each one of the input ports.
13 . The interfacing method according to claim 12 , wherein for controllably coupling ring switching elements between each two of the port couplings are provided and controlled to close or open the ring structure between the respective port couplings.
14 . The interfacing method according to claim 12 , wherein for controllably coupling a port switching element between each one of the port couplings and the respective input ports of the central switching unit is controlled to couple the respective one of the input ports to the respective port coupling or decouple the respective input port from the respective port coupling.
15 . The interfacing method according to claim 11 , wherein the at least three calibration standards comprise at least one of an open calibration standard, a short calibration standard, a match calibration standard, or a high reflection calibration standard.
16 . The interfacing method according to claim 11 , further comprising controlling at least one of the port calibration units, and the central switching unit via a controller.