Abstract: An electromagnet structure comprises a magnetic shell having a cavity, a magnetic pole located within the cavity and having a magnetic gap for focusing a magnetic field on a magnetically tunable filter, a conductive coil located within the cavity of the magnetic shell and forming multiple turns around the magnetic pole, and a heater located within the cavity of the magnetic shell and configured to maintain the conductive coil at a substantially constant temperature when the magnetically tunable filter is tuned to different frequencies.

Abstract: An electromagnet structure comprises a magnetic shell having a cavity, a magnetic pole located within the cavity and having a magnetic gap for focusing a magnetic field on a magnetically tunable filter, a conductive coil located within the cavity of the magnetic shell and forming multiple turns around the magnetic pole, and a heater located within the cavity of the magnetic shell and configured to maintain the conductive coil at a substantially constant temperature when the magnetically tunable filter is tuned to different frequencies.

Abstract: A shielded high-frequency circuit module includes a conductive frame electrically coupled to a top surface of a printed circuit board and a lid. The conductive frame includes inner walls, which define a circuit region, at least a portion of which includes a circuit on the top surface of the printed circuit board. The shielded high-frequency circuit module also includes a connector for interfacing the circuit region with high-frequency signals outside the conductive frame, at least a portion of the connector being electrically coupled to the conductive frame. The inner walls of the conductive frame, the top surface of the printed circuit board and the lid define a shield surrounding the circuit region.

Abstract: A shield for an electronic circuit for controlling electromagnetic radiation. The circuit is constructed on a PCB having a minimum of three metal layers. The PCB includes SMT shield connectors for carrying signals to the circuit. The shield includes a metal wall portion mounted to the PCB and a removable metal lid mounted to the wall portion. The PCB, connectors, wall portion and lid together form a continuous electromagnetic barrier around the circuit.

Abstract: An adaptor includes a connector interface having a first coaxial structure with a first center pin configured to be coupled to a first center conductor of a first coaxial transmission line and a second coaxial structure with a second center pin configured to be coupled to a second center conductor of a second coaxial transmission line. A nut surrounds the first coaxial structure and the second coaxial structure.

Abstract: A coaxial connector including an outer conductor, a glass to metal seal (GMS) assembly, and a center conductor, is disclosed. The outer conductor has a tubular shape and defines longitudinal axis. Here, the center conductor and the GMS assembly are coupled before they are placed within the outer conductor. When the GMS assembly is coaxially placed within the outer conductor, the GMS assembly and the outer conductor define a variable gap enclosure. Fusing agent such as solder is placed within the variable gap enclosure. A bead is inserted into the outer conductor surrounding the center conductor and engaging the center conductor at a circumferential slot. The slide-on dielectric bead provides support for the center conductor and maintains the center conductor's position within the outer conductor and its characteristic impedance throughout.

Abstract: Testing is performed on a device under test. A first port of a first calibration module is connected to the device under test. A second port of the first calibration module is connected to a network analyzer. A first port of a second calibration module is connected to the device under test. A second port of the second calibration module is connected to the network analyzer. A measurement calibration and testing are performed without disconnecting the first port and the second port of the first calibration module and without disconnecting the first port and the second port of the second calibration module.

Abstract: A connector interface provides high-frequency differential connection to a balanced cable or balanced electronic device, such as a balanced probe. The connector interface includes two coaxial structures in a single connector. When the connector interface is used in a package launch, the closeness of the center pins of the two coaxial structures facilitate connection to a balanced circuit. When used in conjunction with a balanced vector network analyzer, the connector interface can simplify calibration and testing of devices by reducing the number of connections to the calibration standards or devices being tested, and provide improved measurement accuracy.

Abstract: A connector interface provides high-frequency differential connection to a balanced cable or balanced electronic device, such as a balanced probe. The connector interface includes two coaxial structures in a single connector. When the connector interface is used in a package launch, the closeness of the center pins of the two coaxial structures facilitate connection to a balanced circuit. When used in conjunction with a balanced vector network analyzer, the connector interface can simplify calibration and testing of devices by reducing the number of connections to the calibration standards or devices being tested, and provide improved measurement accuracy.