Resources Contact Us Home
Browse by: INVENTOR PATENT HOLDER PATENT NUMBER DATE
 
 
Method and system for equalizing cable losses in a distributed antenna system










Image Number 12 for United States Patent #8121646.

The invention is directed to a method and system for equalizing the signal losses over cable runs in a Distributed Antenna System (DAS). In a DAS, two or more antennae are connected to the system by cable runs that can vary widely in length. As a result, the signal loss over a given cable run can also vary widely which can impact the design and deployment of the DAS and reduce antenna spacing. In addition, for a broadband DAS that supports many frequency bands or ranges using a common antenna unit, the signal losses vary with respect to frequency further making it difficult to equalize the cable losses. According to one embodiment of the invention, the method and system provide for measuring and adjusting the signal losses of each cable run to be a predefined value. According to another embodiment of the invention, the DAS can include a hybrid passive-active antenna unit which includes a frequency multiplexer that separates the signal into frequency bands or ranges that are connected to an antenna element associated with a particular frequency band or range. Where a single frequency band needs to be amplified (or attenuated), a single band amplification block (SBAB) can be inserted in the connection between the frequency multiplexer and the antenna element to amplify (or attenuate) the desired frequency band. Where more than one frequency band need to be amplified (or attenuated), a multiband amplification block (MBAB) can be inserted in the connection between the frequency multiplexer and the appropriate antenna element to amplify (or attenuate) the desired frequency bands.








 
 
  Recently Added Patents
Systems, methods, and devices for dynamic resource monitoring and allocation in a cluster system
Semiconductor device comprising through-electrode interconnect
Ultrasonic device for cutting and coagulating with stepped output
Amorphous electrode active material and lithium secondary battery
Method, system and apparatus of hybrid federated search
Clocking of client signals output from an egress node in a network
Method for data processing in an optical network, optical network component and communication system
  Randomly Featured Patents
Method and apparatus for image processing capable of efficiently performing a gray-scale correction
Multiple socket wrench
Computer-implemented method and system for handling business transactions within an inhomogeneous legal environment
Gun sight
Apparatus and methods for multi-gate silicon-on-insulator transistors
Detecting a short in an apparatus and method for determining the thermal stability of fluids
System, method and device for high bit rate data communication over twisted pair cables
Sub-assembly effecting the elastic return of the position-retention device belonging to a ski binding
Technique for improving uniformity of a ribbon beam
Fluorine-modified silicone, process for preparing the same, and cosmetics containing the same