Abstract: The present invention concerns signal coupler systems for power grids, in particular novel methods and apparatus to obtain signal isolation as well as methods for exploiting behavior of existing apparatus.

Abstract: The present invention concerns analog signal repeater system solutions of the general kind. It concerns in particular stability with analog signal repeater systems.

Abstract: The present invention concerns a system for high frequency signal transmission in power line networks and also concerns signal hubs and repeaters to be used in such systems. The primary aim of the invention is to provide a communication system of a general type wherein the isolation between high frequency input and output signals is maintained. The hubs and repeaters are designed to be easily installed in the network. Radio and wireless links at subscriber nodes are also parts of the system.

Abstract: Signal repeater system of the general type that facilitates using various standards and various modulation types to improve properties with various infrastructure, in particular power grid systems.

Abstract: The present invention concerns a system for high frequency signal transmission in power line networks and also concerns signal hubs and repeaters to be used in such systems. The primary aim of the invention is to provide a communication system of a general type wherein the isolation between high frequency input and output signals is maintained. The hubs and repeaters are designed to be easily installed in the network. Radio and wireless links at subscriber nodes are also parts of the system.

Abstract: A method of obtaining single wire transmission line (440) wherein the use of short wavelengths yields low radiation losses and wherein transmission line losses are compensated by repeaters (19, 213-219) at required intervals.

Abstract: The present invention concerns a system for high frequency signal transmission in power line networks and also concerns signal hubs and repeaters to be used in such systems. The primary aim of the invention is to provide a communication system of a general type wherein the isolation between high frequency input and output signals is maintained. The hubs and repeaters are designed to be easily installed in the network. Radio and wireless links at subscriber nodes are also parts of the system.

Abstract: Analogue signal repeater system, (1) where frequency converting repeaters (6-9, 10-13) of super-heterodyne or superregenerative type realised with any of discrete semiconductors, MMIC semiconductors, ASIC semiconductors are applied to optimize signal dynamics by avoiding echo between repeaters (6-9, 10-13) and where each information channel (15, 16) in the system only needs two frequency bands, where each second repeater (7, 9, 12, 10) of the signal cascade (2, 14) repeating the signals within the same frequency band to increase isolation against interference between repeaters and against reflections and signal echo.

Abstract: In a transponder (19) for amplification of a received signal (60) into an antenna (1), to a signal (61) for retransmission, and where the retransmitted signal (61) possibly may have information superimposed, a quenched oscillator (5) is incorporated as amplifying element. The oscillator (5) is preferably of superregenerative type and exhibits negative resistance (30) for the received signal (60). Transponders according to the present invention may be introduced as system elements in a wireless or wire based network to work as intelligent or unintelligent connections in the network. The transponders can also be used in positioning systems.

Abstract: In a transponder (19) for amplification of a received signal (60) into an antenna (1), to a signal (61) for retransmission, and where the retransmitted signal (61) possibly may have information superimposed, a quenched oscillator (5) is incorporated as amplifying element. The oscillator (5) is preferably of superregenerative type and exhibits negative resistance (30) for the received signal (60). Transponders according to the present invention may be introduced as system elements in a wireless or wire based network to work as intelligent or unintelligent connections in the network. The transponders can also be used in positioning systems.