A conductive line radar comprising at least one signal surface wave launcher, which comprises a signal surface wave transceiver, which is physically attached to a power line. The signal surface wave transceiver transmits a wave signal along the power line with another signal radiating from the wave signal in a plurality of directions along the power line. The at least one signal surface wave transceiver receives reflected signals from a target within a distance of the power line. The at least one signal surface wave launcher includes at least one RF communications transceiver and can be inductively powered from the power line.

Conductive line communication apparatus and conductive line radar system and method

Disclosed is a system for power transmission. The system includes a receiver having a receiver antenna. An RF power transmitter includes a transmitter antenna. The RF power transmitter transmits RF power. The RF power includes multiple polarization components. The receiver converts the RF power to direct current. Also disclosed is an antenna for an RF power transmission system. The antenna includes at least two antenna elements. Alternating the radiation between the at least two antenna elements produces a power transmission having components in two polarizations. Additionally disclosed is a transmitter, a receiver and a method for power transmission.

Wireless power transmission

A programming-on-demand cable system is provided which allows any one of a plurality of individual users to request anyone of a plurality of video programs they wish to view from a library of programs, and permits the requested program to be available for viewing on a conventional television set at the user's location following a request initiated by the user. Each program is preprogrammed in a memory device selectable by a host computer at a central data station in response to an address signal transmitted from the user. The host computer in conjunction with other electronics transmits the video program at a high non-real-time rate over a fiber optic line network to a data receiving station at the user's location. The data receiving station then converts the received optical data back to electrical data and stores it for subsequent real-time transmission to the user's television set. The system permits the user to view any one of a number of programs transmitted on a non-real-time basis, and also allows the user to store the transmitted program at his data receiving station for an indefinite period of time for viewing at a later date. A method is also provided for transmitting the programs on a non-real-time basis.

Programming-on-demand cable system and method

An apparatus (20) for launching a surfacewave onto a single conductor transmission line (21) provides a launch including a flared, continuous curving cone (22); a coaxial adapter portion (24); a wire adapter portion (26) for contacting the wire conductor (21) which allows for a multiplicity of wire dimensions for either insulated or uninsulated wire, or a triaxial wire adapter device enabling non-contacting coupling to a wire; and a longitudinal slot is aded to the flared cone.

Method and apparatus for launching a surfacewave onto a single conductor transmission line

An intrusion detection system and method are provided that can utilize impulse radio technology to detect when an intruder has entered a protection zone. In addition, the intrusion detection system and method can utilize impulse radio technology to determine a location of the intruder within the protection zone and also track the movement of the intruder within the protection zone. Moreover, the intrusion detection system and method can utilize impulse radio technology to create a specially shaped protection zone before trying to detect when and where the intruder has penetrated and moved within the protection zone.

System and method for detecting an intruder using impulse radio technology

A CW radar transmitter is simultaneously frequency modulated with a sinusal wave and phase-modulated with a pseudorandom binary code. Both the frequency of the FM signal and the bits and bit duration in the binary code can be varied to change the resolution and range of the system.

Continuous wave correlation radar system

A range-gated radar system which includes a phase modulator that modulatesn r.f. generator with a signal which may be binary coded. In a preferred embodiment, the binary signal is a periodic signal of 2 N -1 bits per period. Starting at some arbitrary point in the sequence, K contiguous bits are transmitted then M contiguous bits are passed over, then K more bits are transmitted, and so on. The quantities M+K and 2 N -1 have no primary factors in common. The radar system may be a doppler radar system using balanced digital processing which involves separating the upper and lower sideband components of modulation that exist in the return radar signal as a result of the motion of scatterers and subtracting them.

Range-gated pulse doppler radar system

The electronic time compressor or expander includes a memory for storing a plurality of samples from a predetermined portion of an input signal occuring over a first time period. The samples contained in the memory are presented at an output over a second time period which is either greater or less than the first time period. In this way, the frequency of the input information will have been translated either up or down. Several modifications showing various arrangements of memory elements and controls are shown. One modification shows a simple memory in the form of a shift register through which the samples of the input information are shifted. As the samples are shifted through the shift register, a clock and several down counters control gating devices which insert new samples of the input signal into the register at one rate and reads the stored samples from the register at a second rate. Another modification shows a static, rather than dynamic, memory in the form of a bank of analog storage elements such as capacitors into which input samples are stored at one rate through low impedance gates and out of which these samples are read at a second rate through high impedance devices. Other modifications include dynamic memories in the form of shift registers combined with gating systems for writing and/or reading samples into or out of the registers at selective locations and at different rates.

Electronic time compressor or expander

Steerable phased array antennas of the tapered type in which the antenna ment power is maximum at the center of the array and tapers off on either side thereof. The phase shifters of each antenna element are of the binary digital type with the number of stages and hence the phase accuracy being maximum for the high power center antenna elements and tapering off on either side thereof. Redundant stages for the binary phase shifters can be provided to increase reliability.

Phased array antennas with binary phase shifters

An electronic detection system for detecting intruders employs a transmission line as a sensing element. The transmission line is positioned about the perimeter of the area to be protected. An antenna applies pulsed RF energy to the line. An intruder in the field of the line causes an RF reflection back toward the source, which reflection may be detected by Doppler range-gating techniques.

Otto E. Rittenbach

Papers

Continuous wave correlation radar system

Range-gated pulse doppler radar system

Electronic time compressor or expander

Phased array antennas with binary phase shifters

Electronic intruder detection system