Abstract: A heating element includes a flexible substrate, a layer of adhesive disposed on a surface of the substrate, and a continuous strand of electrically conductive wire disposed on the adhesive in a pattern of coil structures. Each coil structure includes a first coiled part and a second coiled part. The wire in the first coiled part forms a counterclockwise pattern from an outermost turn to an innermost turn of the first coiled part, and the second coiled part has an innermost turn beginning at an end of the innermost turn of the first coiled part. The wire in the second coiled part forms a clockwise pattern from the innermost turn of the second coiled part to an outermost turn. A connector segment of wire connects outermost turns of adjacent ones of the coil structures.

Abstract: There is presented a gully sensor for deployment within, and detecting the presence of matter contained in, a gully. The gully sensor may be arranged to detect when the gully has become blocked, and may further be arranged to notify an external party of such an event. The gully sensor may comprise an elongate body, the body further comprising a first portion which accommodates a light source and a second portion which accommodates a light detector for detecting light emitted from the light source along a light path towards the detector. The gully sensor may further comprise a cross section that is orientated along at least a portion of the light path shaped to allow the matter to intersect at least a portion of the light path, and which joins the first and second portions via the elongate body.

Abstract: A circuit and computer implemented method tunes an RF switching power amplifier circuit for an antenna by receiving a measurement of reflected RF signal from the antenna, receiving a measurement of current provided to the circuit from a power source, receiving a measurement of RF power provided to the antenna, adjusting a tunable antenna circuit responsive to the measurement of reflected RF signal, and adjusting a first capacitor capacitance value and a second capacitor capacitance value of a waveform shaping circuit in response to the received measurement of current and RF power.

Abstract: A method of attaching wire to an exposed surface of an adhesive layer includes guiding wire from a wire source through a payout head and through a foot of a write head. A first portion of the wire extends from the foot toward the adhesive layer. The write head is positioned such that a gap between the foot and the exposed surface of the adhesive layer is greater than a diameter of the wire. The write head is moved in a motion parallel to the adhesive layer, and the first portion of the wire adheres to the adhesive layer. Wire is pulled from the wire source by the payout head as the write head is moving in order to maintain slack in a second portion of the wire between the payout head and the write head as the wire is attached to the exposed surface of the adhesive layer.

Abstract: A module for radio frequency signal circuits includes an electrically conductive housing. Coax connectors are secured to the rear face of the housing. A circuit board is contained within the interior spaced between sidewalls of the housing. A ground side of the circuit board includes a layer of electrically conductive material which is electrically connected to the housing. Coax cables extend within the interior of the housing from the coax connectors and between the ground side of the circuit board and an opposing sidewall. An opposite side of the circuit board contains circuit components interconnected with one another through a plurality of circuit paths.

Abstract: A racetrack designed to accommodate various types of auto racing class including Indy, CART, Formula 1 etc. is disclosed. The race track of the present invention is a continuous closed circuit track with at least two loops which loop about a common center area and with track passing over itself at least once by a nonlevel crossing such as an overpass so that the track does not have a level crossover and thereby allowing a vehicle making an entire circuit of the track the option of only making turns in one direction and not passing over any portion of the track more than once is a single circuit of the track.

Abstract: A module for radio frequency signal circuits includes an electrically conductive housing. Coax connectors are secured to the rear face of the housing. A circuit board is contained within the interior spaced between sidewalls of the housing. A ground side of the circuit board includes a layer of electrically conductive material which is electrically connected to the housing. Coax cables extend within the interior of the housing from the coax connectors and between the ground side of the circuit board and an opposing sidewall. An opposite side of the circuit board contains circuit components inter-connected with one another through a plurality of circuit paths.

Abstract: A module for radio frequency signal circuits includes an electrically conductive housing. Coax connectors are secured to the rear face of the housing. A circuit board is contained within the interior spaced between sidewalls of the housing. A ground side of the circuit board includes a layer of electrically conductive material which is electrically connected to the housing. Coax cables extend within the interior of the housing from the coax connectors and between the ground side of the circuit board and an opposing sidewall. An opposite side of the circuit board contains circuit components inter-connected with one another through a plurality of circuit paths.

Abstract: A racetrack designed to accommodate various types of auto racing class including Indy, CART, Formula 1 etc. is disclosed. The race track of the present invention is a continuous closed circuit track with at least two loops which loop about a common center area and with track passing over itself at least once by a nonlevel crossing such as an overpass so that the track does not have a level crossover and thereby allowing a vehicle making an entire circuit of the track the option of only making turns in one direction and not passing over any portion of the track more than once is a single circuit of the track.

Abstract: A module for radio frequency signal circuits includes an electrically conductive housing. Coax connectors are secured to the rear face of the housing. A circuit board is contained within the interior spaced between sidewalls of the housing. A ground side of the circuit board includes a layer of electrically conductive material which is electrically connected to the housing. Coax cables extend within the interior of the housing from the coax connectors and between the ground side of the circuit board and an opposing sidewall. An opposite side of the circuit board contains circuit components interconnected with one another through a plurality of circuit paths.

Abstract: A module for radio frequency signal circuits includes an electrically conductive housing. Coax connectors are secured to the rear face of the housing. A circuit board is contained within the interior spaced between sidewalls of the housing. A ground side of the circuit board includes a layer of electrically conductive material which is electrically connected to the housing. Coax cables extend within the interior of the housing from the coax connectors and between the ground side of the circuit board and an opposing sidewall. An opposite side of the circuit board contains circuit components inter-connected with one another through a plurality of circuit paths.

Abstract: A module for radio frequency signal circuits includes an electrically conductive housing. Coax connectors are secured to the rear face of the housing. A circuit board is contained within the interior spaced between sidewalls of the housing. A ground side of the circuit board includes a layer of electrically conductive material which is electrically connected to the housing. Coax cables extend within the interior of the housing from the coax connectors and between the ground side of the circuit board and an opposing sidewall. An opposite side of the circuit board contains circuit components interconnected with one another through a plurality of circuit paths.

Abstract: A module for radio frequency signal circuits includes an electrically conductive housing. Coax connectors are secured to the rear face of the housing. A circuit board is contained within the interior spaced between sidewalls of the housing. A ground side of the circuit board includes a layer of electrically conductive material which is electrically connected to the housing. Coax cables extend within the interior of the housing from the coax connectors and between the ground side of the circuit board and an opposing sidewall. An opposite side of the circuit board contains circuit components interconnected with one another through a plurality of circuit paths.

Abstract: A module for radio frequency signal circuits includes an electrically conductive housing. Coax connectors are secured to the rear face of the housing. A circuit board is contained within the interior spaced between sidewalls of the housing. A ground side of the circuit board includes a layer of electrically conductive material which is electrically connected to the housing. Coax cables extend within the interior of the housing from the coax connectors and between the ground side of the circuit board and an opposing sidewall. An opposite side of the circuit board contains circuit components inner connected with one another through a plurality of circuit paths. The components include directional couplers connected in series to combine branch circuits with each branch circuit having a separate attenuator.

Abstract: A splitter/combiner module for radio frequency signal circuits includes an electrically conductive housing. Coax connectors are secured to the rear face of the housing. A circuit board is contained within the interior spaced between sidewalls of the housing. A ground side of the circuit board includes a layer of electrically conductive material which is electrically connected to the housing. Components on the circuit board include splitter/combiners for splitting a signal into a plurality of branch signals each having an individual attenuator component.

Abstract: A module for radio frequency signal circuits includes an electrically conductive housing. Coax connectors are secured to the rear face of the housing. A circuit board is contained within the interior spaced between sidewalls of the housing. A ground side of the circuit board includes a layer of electrically conductive material which is electrically connected to the housing. Coax cables extend within the interior of the housing from the coax connectors and between the ground side of the circuit board and an opposing sidewall. An opposite side of the circuit board contains circuit components inner connected with one another through a plurality of circuit paths. The circuit components include an equalizer removable through the forward face of the housing to equalize an RF attenuation across a broad band.