3 results about "Passive repeater" patented technology

Systems, methods, and computer-readable media are described herein which utilizes and controls an electromagnetic energy beam steering apparatus. The electromagnetic energy beam steering apparatus uses directional properties of a Luneburg lens to receive RF energy from one or more points of the Luneburg lens and re-transmits the RF energy from a different point of the Luneburg lens to focus the RF energy in a desired direction. The electromagnetic energy beam steering apparatus may take a form of a passive repeater, an active repeater, or a multipath active repeater.

The application discloses an optical fiber communication passive relay system and method, belonging to the field of optical fiber communication, comprising a first end station and a second end station located at both ends of a communication link, and a passive gain unit located in the middle of the communication link, wherein the first end station and the passive gain unit are connected in series through anti-resonant hollow optical fibers, and the second end station and the passive gain unit are also connected in series through anti-resonant hollow optical fibers; the passive gain unit comprises a solid doped optical fiber and two mode field adapters arranged at both ends of the solid doped optical fiber and used for connecting the anti-resonant hollow optical fibers; the first end station is used for transmitting signal light and pump light to the passive gain unit through the anti-resonant hollow optical fibers; and the passive gain unit amplifies the signal light by using the received pump light and transmits the amplified signal light to the second end station through the anti-resonant hollow optical fibers. The application can amplify the signal light by using the passive gain unit, does not need power supply, simplifies the structure of a submarine cable, reduces the cost, and improves the single-fiber transmission capacity and distance.

There is provided a water meter system, comprising: a water meter 6 for measuring a consumption of water and for generating consumption data indicative of the consumption of water; a meter box 10 comprising a frame 8 which at least partially surrounds a periphery of the water meter 6 and a cover 9 for covering the frame; and a passive repeater 4 attached to the cover 9 of the meter box 10, wherein the passive repeater comprises a first antenna 1 and a second antenna 2 which are in wired communication with one another, and wherein the passive repeater is configured such that, when the cover covers the frame, the first antenna 1 is located within an interior of the meter box 10 and the second antenna 2 is exposed to an exterior of the meter box 10; wherein the water meter 6 is wirelessly connected through the passive repeater 4 to a recipient device remote from the water meter system, and is configured to transmit data to the recipient device, the transmitted data comprising the consumption data.