摘要:
A microwave interconnect for integrated or hybrid circuits includes a flexible sheet bearing a flexible conductor which is divided into a plurality of insulated conductive lines, at least some of which make contact with the integrated or hybrid circuit, as well as with a second circuit to which the first is thereby connected. The flexible sheet is backed by a body of elastomeric material and a compression bar which assures good electrical contact of the flexible conductor with the circuits when the compression bar is tightened down on the circuits. The construction allows some degree of misregistration of parts while providing circuit coupling operative at high frequencies.
摘要:
A capacitive tuning screw comprises a threaded portion with a longitudinal cavity for slidably receiving a plunger shaft. If the capacitive element on the tip of the plunger shaft contacts the corresponding capacitive element on the surface of an electrical circuit board or substrate, further turning of the screw will cause the shaft to slide into the cavity and prevent crushing the circuit board or substrate. A shoulder on the screw stops rotation and longitudinal movement of the screw before the entire length of the plunger shaft slides into the cavity.
摘要:
An adapter, having a dielectric substrate upon which are mounted an array of uniformly-spaced, coplanar conductive strips and impedance standards having similarly spaced coplanar leads, facilitates planar transmission line probe measurements of the high-speed electrical characteristics of a package or other interconnect structure for a high-speed integrated circuit. The conductive strips of the adapter are connected to the terminals of the package so as to simulate the integrated circuit connection, that is, with substantially identical length and spacing of bond wires. The planar probe, by contacting the conductive strips of the adapter, is able to measure the electrical characteristics of the package including the bond wires, thereby providing realistic measurements of the integrated circuit's environment. The impedance standards on the adapter are specially designed to enable the effects of the adapter to be removed from the measurements by calibration.
摘要:
A broadband, monolithic integrated-circuit power divider/combiner circuit utilizing gallium arsenide field-effect transistors configured as distributed amplifiers. Two distributed amplifiers include a common merged transmission line element which divides/combines the input signal(s).
摘要:
A high-frequency probe comprising a semirigid coaxial line which terminates in an active circuit assembly. The coaxial line's outer conductor is connected to a box while its inner conductor is connected to an active circuit chip. A signal contact needle is attached to the active circuit chip and extends linearly with the coaxial line. The signal needle is held in place with a mass of epoxy filled with silica microballoons, providing a low-capacitance mount. A ground contact needle is connected to a wiper which contacts the box, thus providing a direct, and short, path between the coaxial line's outer conductor and the ground contact needle.
摘要:
A system for calibrating vector corrected electrical measurements to adjust for distortion due to reactance in the measuring circuit, particularly that caused by variable positioning of a circuit element, such as probe or coupling. Initial error factors for directivity, source match, and frequency response, respectively, normally calculated from assumed reflection coefficients of respective primary impedance standards, are adjusted to correct for such reactance. Reflection coefficient measurements (magnitude and phase) of a further impedance standard, different from the primary standards, are obtained at multiple frequencies and corrected by the initial error factors. The corrected magnitude and phase measurements of the further impedance standard are compared with theoretical magnitude and phase values which very linearly with frequency, and the initial error factors are adjusted so as to minimize any deviation of the corrected measurements from the linear values. Thereafter, by positioning the probe or other circuit element relative to a device under test substantially identically to its previous placement relative to the further impedance standard, the adjusted error factors can be used to obtain corrected measurements with minimized magnitude and phase errors due to reactance.
摘要:
A surface mountable microwave IC package uses printed transmission lines on a printed circuit board in lieu of plumbing between milled packages. A backside co-planar waveguide is connected to a topside microstrip line by a through-hole in a carrier substrate. To compensate for inductance added by the hole and transmission line ends, a gap is adjusted to provide compensation capacitance. Hermetic sealing of the package is assured by brazing a lead frame over the through-hole and using a solder sealed lid. The lid provides both a hermetic seal and shielding.
摘要:
A waveguide configuration have a longitudinal ridge directly opposing a longitudinal trough. The ridge provides broadband signal transmission characteristics of ridge waveguides and may extend within the trough to result in a virtually horizontal electric field configuration.
摘要:
A test fixture for testing microstrip assemblies and similar electronic circuit components and assemblies under application of high-frequency signals introduced through launchers whose positions are adjustable in the test fixture to accommodate circuit assemblies of different sizes and different geometry. An easily operated rapid connector positioning mechanism moves connectors which complete electrical connection between outer conductors of the launchers and a ground plane conductor of a microstrip assembly. The connectors also lift the microstrip assembly and support it while electrical connection is completed, without the need for a carrier beneath the test assembly. A lid is moved in coordination with operation of the connector positioning mechanism to provide electrical contact to a third point on the upper face of a circuit assembly to be tested.
摘要:
An interface structure, for connecting a pair of coplanar transmission lines in end-to-end overlapping relation to each other, employs dissimilarly-shaped overlapping end portions of the respective signal and/or ground lines of the transmission lines. The dissimilarly-shaped end portions are effective to minimize variations in the impedance of the interface structure due to variations in transverse and/or longitudinal alignment of the overlapping end portions of the respective transmission lines, thereby making the interface tolerant to misalignments.