A structure is provided. The structure includes a signal retrieval circuit formed within a disk located within a coaxial cable connector. The signal retrieval circuit is located in a position that is external to a signal path of an electrical signal flowing through the coaxial cable connector. The signal retrieval circuit is configured to extract an energy signal from the electrical signal flowing through the coaxial cable connector. The energy signal is configured to apply power to an electrical device located within the coaxial cable connector. The sensing circuit is configured to sense physical parameter such as condition of the RF electrical signal flowing through the connector or presence of moisture in the connector. The structure may include an integrated circuit configured to convert the parameter signal into a data acquisition signal readable by the integrated circuit.

Internal coaxial cable connector integrated circuit and method of use thereof

The present invention provides an autombile antenna system for detecting surface currents induced on the vehicle body by radio waves. The antenna system includes an electrostatic shielding case mounted on the vehicle body and having an opening formed therein. The opening in the case faces a metallic plate in the vehicle body and a loop antenna is housed within the case and disposed in close proximity to the opening thereof. The loop antenna has a plane of the loop positioned relative to the surface of the metallic vehicle plate at an angle in the range of 90 degrees to 135 degrees or 225 degrees to 270 degrees, whereby the antenna system can more efficiently detect the surface currents induced on the vehicle body by radio waves and can be miniaturized and improved in performance without any externally protruding member.

Automobile antenna system

A wide-band loop antenna consists of a main loop antenna conductor and a sub-loop antenna conductor. The main loop antenna conductor is provided on a dielectric plate to extend from one terminal of a pair of feed terminals to another one of the terminals so as to form a one-turn open loop. The loop antenna conductor is provided on the dielectric plate so as to extend along the main antenna conductor to provide a one-turn open loop and is connected to the pair of feed terminals to constitute a synthesized antenna together with the main antenna conductor. Short-circuting conductors are provided to connect the main antenna conductor with the sub-antenna conductor for shifting a resonance frequency of the synthesized antenna outside the operating band to obtain a wide-band frequency characteristic. In a modification, the sub-antenna conductor forms a closed loop serving as a parasitic antenna which improves an impedance characteristic of the main antenna conductor.

Wide-band loop antenna with outer and inner loop conductors

A DC-to-DC converter for high current outputs is provided having an input side circuit, including two converter bridges, and an output side circuit, including two diode rectifier configurations. The input and output circuits are preferably connected by a co-axial winding transformer (CWT). Switches in the input side bridges alternately connect and disconnect a DC input voltage to and from the primary side of the transformer. The waveform appearing on the secondary of the transformer is rectified by the output side rectifier configurations. A switched-in bias voltage in each input side converter bridge provides for reversal of the current in the bridge after the bridge is switched off, and before the other bridge is switched on. This current reversal allows a current in one of the rectifier configurations of the output side circuit to be brought softly to zero before being reversed biased by the switching on of the other converter bridge. Thus, a reverse recovery spike in the output circuit is avoided. For high current outputs, the CWT is preferably constructed of a copper tube secondary winding enclosing the primary windings. The rectifier configurations include multiple diodes arranged in symmetrical configurations for optimal sharing of the high output currents. Air and water cooling of the diode configurations and output bus bars is provided. The output side circuit assembly can be provided as an integrated unit which is attached between the CWT and the load attached to the converter output.

DC-to-DC power conversion with high current output

An antenna for generating radiation includes a primary E-field generating circuit and a secondary E-field generating circuit. The primary E-field generating circuit generates a primary E-field in response to a source RF signal being applied to the antenna. The secondary E-field generating circuit generates a secondary E-Field, disposed apart from the primary E-field, in response to the source RF signal and develops an H-field that is in time phase with the primary E-field. This causes the antenna to develop a radiation resistance as an indication of radiation.

Coaxial inductor and dipole EH antenna

An improved antenna system for the transmission and/or reception of electromagnetic signals is described which utilizes a region or regions of natural current concentration within the conductive portion or portions of fixed or mobile structures for the extraction or insertion of electromagnetic energy.

Antenna system utilizing currents in conductive body

An antenna system responsive to both the E and H fields in a radiated electromagnetic signal relies upon the placement within the influence of a conductive edge formed by an opening in a closed conductive body of an element having an effective electrical length which approximates a resonant length in free space in the intended range of operating frequencies for the antenna.

Windshield antenna system with resonant element and cooperating resonant conductive edge

An improved radio-frequency transformer, particularly useful in conductive-body antenna systems, is provided in which telescoping of two or more portions of the primary of the transformer results in increased compactness, high effeciency and decreased cost.

Radio frequency transformer

A conductive body having an opening therein, the edge of opening having a length which is less than a resonant length at AM broadcast band frequencies and greater than a resonant length at FM broadcast band frequencies, is caused to operate as an effective antenna over the FM band or over both the FM and AM bands by electrically shortening the length of the edge of such opening at FM frequencies without physically shortening the perimeter of such opening or electrically shortening the edge of such opening at AM frequencies, a common cable or cables being utilized to couple both AM and FM signals to external circuits, switching at the conductive edge thus being eliminated.

FM-AM windshield antenna

An improved remotely tuned conductive-body antenna system is provided which gives superior signal coupling between the low impedance conductive body and the associated radio-frequency circuits with minimum loss of selectivity or ''''Q'''' in those circuits by increasing the inductive reactance of the coupling means insofar as the associated radio-frequency circuits are concerned without mis-matching the input to the coupling means and the low impedance conductive-body signal source.

Ross Alan Davis

Papers

Antenna system utilizing currents in conductive body

Windshield antenna system with resonant element and cooperating resonant conductive edge

Radio frequency transformer

FM-AM windshield antenna

Remotely tuned conductive-body antenna system