Abstract: An irrigation apparatus comprises an in-line dripper insert having a support for attaching a micro tube to the dripper outlet. A fluid conduit in which the insert is placed has an aperture in line with the support. The support preferably comprises a projection for securing a micro tube thereto, a sleeve for securing a micro tube or a connector thereto, or a shoulder for supporting the attachment of a connector to the fluid conduit at the aperture. The dripper insert is secured to the inner surface of the fluid conduit and is contained entirely therein. After detachment of the micro tubes, the main fluid line may be easily reeled or otherwise handled. The internal dripper provides structural internal support to the main fluid conduit when external pressure is applied to the line, such as when a micro tube or a connector is forced against the fluid line to be connected thereto.

Abstract: A means of connecting a plurality of essentially identical active devices is presented for the purpose of multifunction and multiple function operation. These devices, mounted on a chip, are flip-mounted onto a circuit formed on a base substrate and having large passive elements. Push-pull amplifiers are presented as examples in which the multiple function operation is the combining of amplifiers whose active devices are on a single chip. Electromagnetic coupling, impedance matching and signal transmission are variously provided by the use of strip lines, slotlines, coplanar waveguides, and a slotline converted into a coplanar waveguide.

Abstract: An antenna support structure has a base for mounting on a pole clamp. The position of the pole clamp on a pole is adjusted by use of a removable installation tool. The installation tool comprises front and back tool clamp plates that are frictionally secured about the pole by fasteners. One or more adjustment tools may be mounted on the tool clamp plates and interact with the pole clamp and the antenna support structure so as to effect movement of the pole clamp and the antenna relative to the installation tool and the pole. Movement of the pole clamp and the antenna relative to the pole allows an operator to finely tune the azimuth and/or elevation angles of the antenna which is mounted on the pole clamp.

Abstract: A slot line band reject pass filter including a substrate of insulating material having slot line primary conductors formed thereon. One or more supplemental conductors are preferably coupled to the slot line primary conductors to achieve rejection of a desired frequency. Several embodiments of supplemental conductors are disclosed including substantially closed loop and non loop segments that extend in a range from parallel to perpendicular from the primary conductors. The supplemental conductors may be directly or electromagnetically coupled, or both.

Abstract: A high frequency circuit structure including a base substrate having a planar face, a first base slotline mounted on the base substrate face and consisting of first and second, spaced-apart coplanar base conductors, and a circuit chip flip-mounted on the base substrate. The circuit chip include a chip substrate having a planar face facing the planar face of the base substrate. A slotline resident on the chip is flip mounted onto the base slotline. Input and output connections made according to the invention can be used to provide connections to an intermediate circuit resident on either the chip or the base substrate. A second chip slotline may be electrically in series or parallel with the first chip slotline.

Abstract: First and second spaced-apart planar circuit ground conductors are formed on a base substrate. Multiple stages of an amplifier each have a field effect transistor (FET) flip mounted onto the substrate. A signal-return line couples the sources of the FETs together and functions as a radio frequency (RF) grounds for the amplifier. Direct-current-blocking coplanar couplers couple the amplifier input and output to external circuits. A single voltage supply applies a bias voltage to the drains of the FETs. A source resistance device couples each source terminal to circuit ground. The source resistance devices may be formed of two series-connected resistors. The gate of each FET is coupled to one of the circuit ground conductors through one of the source resistors. The other source resistor thereby provides a gate-to-source voltage for biasing the FET.

Abstract: The preferred embodiment of the present invention is a communications apparatus which includes a first transmitting antenna array (15A) having a transmitting antenna (16) which is dedicated to serve only a first sector (12). Similarly, a second transmitting antenna array (17A) having a transmitting antenna (18) is dedicated to serve only a second sector (14). Each of the transmitting antenna arrays (15A, 17A) have a beamwidth (19) of generally less than fifteen degrees. Both the first and the second transmitting antenna arrays (15A, 17A) emanate shaped beams which are alternately polarized to ensure the isolation of beams that serve adjacent sectors.

Abstract: A trough waveguide antenna that has a septum and opposing bases and side walls. In one embodiment, the bases are undulated and asymmetrically disposed about the septum. The magnitude, periodicity and length, etc., of the undulations may be varied for performance. The configuration of the septum may be similarly varied. Other mechanisms for achieving energy radiation are also disclosed as are cost effective fabrication techniques.

Abstract: A switched mode power supply circuit is provided that converts an input DC or AC voltage to a constant DC output voltage. The circuit uses a combination of a switch and an inductor at the output stage. When the switch is open, a current through the inductor decreases linearly until it reaches zero. Then the switch is closed, and the inductor current increases linearly until it reaches an upper limit, at which time the switch is opened, and the inductor current starts decreasing again. The upper limit of the inductor current is computed by a support circuit, and thus it does not need to be provided by sensing the input voltage independently. The computation uses the durations ratio D of a recent fall time duration of the inductor current divided by a recent rise time duration of the inductor current. The maximum inductor current is computed by multiplying a constant current value by D.times.(1+D). The result is a circuit with resistive only input impedance.

Abstract: A coplanar band pass filter having a centerline formed of at least first and second serially arranged conducting segments which are separated by a gap. The centered segments are flanked by a resonator for coupling return current from the first and second segments. Conducting members that may include conductive strips or conductive planes are respectively provided on opposing sides of the resonator and centerline. Band pass elements may be provided in the conductive strips or planes to reduce or eliminate spurious pass band frequencies.

Abstract: An illumination control system uses two photocells, one directed toward an illuminated lamp and the other directed from the ceiling downwardly into the illuminated zone. A feedback signal is derived from the two photocell signals and a reference intercept signal. The feedback signal and a reference set point signal are input into an error amplifier. The error amplifier generates a control signal for setting the illumination in controlled lamps. The photocell signals are variously scaled to provide balancing between them and matching with the intercept signal. Scaling factors and intercept signal level arc set in a calibration procedure that establishes feedback circuit response consistent with a design set point transfer function.