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
Semiconductor device and method for manufacturing the same
Method and apparatus for charging a power pack of a portable electronic device
Method and apparatus for managing backup channel in multi-channel environment
Method for manufacturing non-volatile memory device, non-volatile memory element, and non-volatile memory device
Method and system for accomplishing user equipment purge
Tactile output device for computing device notifications
Vehicle drive control system
  Randomly Featured Patents
Method for making a collapsible funnel
Authentication and access control device
Method and apparatus for treating wastes by gasification
Display device and driving method of display device
Amphiphile prodrugs
Embedding material and process for the production thereof
Discharge lamp lighting apparatus
Pointing device for a computer system with automatic detection of lifting, and relative control method
Electrographic writing system with diode switching assembly
Refrigerator lighting