Abstract:
A measuring instrument for detection of electrical properties in a liquid includes a main body configured to hold a tester, a first pole extending from the main body, and a second pole extending from the main body that is spaced apart from the first pole. The first pole carries a positive probe for attachment to the tester, and the second pole carries a negative probe for attachment to the tester. When the probes are placed in the liquid, electrical properties in the liquid are detected by the tester.
Abstract:
A microstrip probe that can be inserted into the mouth or radiating portion of a thick flared notch or open ridged waveguide radiator element within an array antenna aperture and coupled to the TEM feed circuit transition of that element. The probe can then be used to extract performance diagnostic data of the circuitry behind the array aperture without removing the aperture itself. The probe bypasses the radiating portion of the array element and the effects of mutual coupling associated with the array. The probe is a printed circuit board whose thickness matches the gap dimension of the flared notch feed circuit transition line at its feed launch point. A coaxial connector at one end provides a connection to a microstrip line formed on the circuit board. The ground plane of the microstrip narrows to transform the microstrip line into a broadside coupled strip transmission line, which runs to the insertion end of the probe. The strips are shorted together at the insertion end. A slot is formed at the insertion end which is one quarter wavelength in length to encourage coupling from the feed circuit into the probe.
Abstract:
A capacitively coupled inductive shunt current sensor which utilizes capacitive coupling between flanges having an annular inductive channel formed therein. A voltage dividing capacitor is connected between the coupling capacitor and ground to provide immediate capacitive division of the output signal so as to provide a high frequency response of the current pulse to be detected. The present invention can be used in any desired outer conductor such as the outer conductor of a coaxial transmission line, the outer conductor of an electron beam transmission line, etc.
Abstract:
Coaxial line apparatus forming a termination and detector for high frequency signals. An input coaxial transmission line has an inner conductor and an outer conductor. The input coaxial transmission line is branched into a load transmission line and a parallel video transmission line. The load transmission line has inner and outer conductors and a matching impedance connected between the inner and outer conductors for terminating the load transmission line. The parallel transmission line has a separate outer conductor and inner conductive means. The inner conductive means include a crystal diode mounted at an angle with respect to the axis of the parallel transmission line outer conductor. The parallel transmission line outer conductor has an apertured portion substantially aligned with the crystal diode so that the crystal diode can be inserted or removed through the apertured portion. The parallel transmission line also includes additional impedances for attenuating relatively high frequency signals.
Abstract:
A current sensor comprises a current carrying trace located within a substrate; and a sensing trace located within the substrate proximate to the current carrying trace; wherein the sensing trace detects an electromagnetic force (emf) generated by magnetic flux inductively coupled from the current carrying trace for transmitting to a current sensing device.
Abstract:
An RF sensor having a novel current sensing probe and a voltage sensing probe to measure voltage and current. The current sensor is disposed in a transmission line to link all of the flux generated by the flowing current in order to obtain an accurate measurement. The voltage sensor is a flat plate which operates as a capacitive plate to sense voltage on a center conductor of the transmission line, in which the measured voltage is obtained across a resistance leg of a R-C differentiator circuit formed by the characteristic impedance of a connecting transmission line and a capacitance of the plate, which is positioned proximal to the center conductor.