Maury Microwave, Inc.

Sathya Padmanabhan

M Tekamül Büber

Gary R Simpson

Byung Dae Lee

Giampiero Esposito

Byung Lee

Steven M Dudkiewicz

Mauro Marchetti

Bruce J Pluth

M Tekamul Buber

M Tekamül BÜBER

A load pull system for making measurements on a DUT at millimeter wave frequencies using active tuning. The system uses phase and amplitude control of each signal at low frequency before being upconverted to the millimeter wave measurement frequencies. The measured signals at the DUT plane may be down-converted for measurement with a low frequency analyzer.

Millimeter wave active load pull using low frequency phase and amplitude tuning

A multi-section probe and a tapered probe for impedance tuners to broaden the band width of the probes and hence the band width of the tuners. The multi-section probe and the tapered probe are configured to transform the characteristic impedance of the tuner transmission line step-by-step or continuously to a target impedance value.

Broadband probes for impedance tuners

A directional coupler operable at microwave and RF frequencies. Embodiments of directional coupler includes a main transmission line supporting transverse electromagnetic (TEM) or quasi-TEM wave mode propagation. A coupled transmission line supports TEM or quasi-TEM wave mode propagation. The coupled transmission line is adjacent to and oriented at an angle with respect to the main transmission line. A coupling hole is formed through conductive shielding between the main and coupled lines, the coupling hole formed at an intersection region between the main and coupled lines. The angle is nominally 60 degrees for optimal directivity and isolation.

Broadband directional couplers for TEM and quasi-TEM mode guides and lines

A load pull system and method for calibrating the system and conducting measurements on a Device Under Test (DUT). The system includes at least one passive tuner; and a modulated signal connected to the DUT input. The passive tuner is calibrated at multiple frequencies within the modulation bandwidth of the modulated signal. The impedance and measured quantities such as power at the DUT reference plane are determined using tuner s-parameters at multiple frequencies within the modulation bandwidth.

Measurement system and calibration method with wideband modulation

A multi-section probe and a tapered probe for impedance tuners to broaden the band width of the probes and hence the band width of the tuners. Each section of the multi-section probe has a nominal length equal to one quarter wavelength at a midpoint of the operating band. The tapered probe has a length equivalent to a plurality of one quarter wavelengths of the frequency midpoint. The multi-section probe and the tapered probe are configured to transform the characteristic impedance of the tuner transmission line step-by-step or continuously to a target impedance value.

Embodiments of a broadband capacitor in a coaxial line are described. A capacitor may be realized in the center conductor of the coaxial line, and this aspect has two different embodiments. One embodiment forms the capacitor between the flat faces of an interrupted inner conductor structure. A second embodiment forms the capacitor between overlapping fingers of the female inner conductor and the male inner conductor, where the fingers can be realized in different ways. In another embodiment, a capacitor is realized in the outer conductor of the coaxial line, between fingers of a female portion of the outer conductor and a male portion of the outer conductor, where the fingers can be realized in different ways.

Broadband RF capacitors for coaxial line

An impedance tuner includes a controller, an RF transmission line, and a movable capacitive object configured for movement commanded by the controller relative to the transmission line to alter impedance. A position sensor is configured to provide feedback position data to the controller indicative of the actual position of the capacitive object after it is moved. The controller is configured to utilize the feedback position data in a closed loop to position the capacitive object at a desired position within a tolerance.

Impedance tuners with position feedback

An impedance tuner having an RF transmission line, with a single lead screw extending along the RF transmission line. A plurality of movable carriages are engaged with the lead screw, wherein each of the plurality of movable carriages is configured for independent movement relative to other carriages. A motorized drive system drives the plurality of movable carriages independently along the lead screw.

Growing community of inventors

Glendora, CA, United States of America

Sathya Padmanabhan