Patent Application
20100257574
1. Field of the Invention
This invention relates to a multimedia network splitter, particularly to a novel multimedia network splitter having better flatness in higher frequency extension during duplex signal transmission such that the insertion loss can be adjusted according to demand, and better return loss feature can be obtained so as to reach more stable signal distribution and anti-interference characteristics, hence the convenience in its total practical application is enhanced when the multimedia network splitter is used to connect with a plurality of televisions or a variety of digital multimedia equipments.
2. Brief Description of Prior Art
The development of combining digital product with digital multimedia equipment is becoming the future trend of home networking. In addition to the WLAN (wireless local area network), the home network connection technology under developing comprises networking technologies of ultra wide band (UWB), HomePlug and MoCA (Multimedia over Coax Alliance) etc. Among those technologies mentioned above, the networking technology of MoCA is a technology alliance founded by a plurality of cable TV companies, satellite TV companies, network equipment suppliers on January 2004. The MoCA is active to facilitate and promote home networking by coaxial cable for home-use so as to connect TV, digital multimedia equipments together for duplex multimedia file transmission and application services. The goal is to integrate telephone, network, CATV, SMATV (Satellite Master Antenna Television System), and WLAN etc. into a coaxial cable through the networking technologies developed by MoCA so as to further upgrade practical application convenience and effectiveness in daily life of human.
The above networking technology developed by MoCA can reach expected effectiveness of integrating telephone, network, CATV, SMATV (Satellite Master Antenna Television System), and WLAN etc. into a coaxial cable, however it is found in practical application that various signals transmitted through coaxial cable have selective attenuation in the frequency of its return signal during the duplex signal transmission process, after various signals are inputted into a plurality of televisions or a variety of multimedia equipments connected to the multimedia broadband splitter of user end. In other words, the attenuation value is not the same for different frequency such that the flatness of frequency extending to higher frequency is not that good. This will result in instability of signal distribution and liability to interference. Instability of signal distribution and interference become more apparent especially in mansion where a mass of residents exists and a huge amount of televisions and various digital multimedia equipments are connected therein. Consequently, the application of MoCA is still unsatisfactory and hence improvements are anxiously expected.
In view of the above facts, inventor of the present invention provides a novel multimedia network splitter according to the improvement conducted on defects of the existing structure based on his abundant experience of R&D and manufacturing in relevant field so as to attain better performance in practical application.
In order to achieve the above object, this invention provides a multimedia network splitter in which a plurality of connection terminals are provided at the outer edge of the housing and a circuit board is provided in the interior; corresponding to the connection terminals on the housing, a plurality of radially spaced attenuation circuits being provided on the circuit board, which is composed of a first resistor and a second resistor parallelly connected together, and each attenuation circuit being suitably matched on the circuit board. With this structure, after the connection terminals are connected with a plurality of televisions or a variety of digital multimedia equipments by coaxial cables, better flatness of frequency bandwidth and wider extended bandwidth can be obtained during transmission of various signals in upload or download condition such that the signals can be evenly distributed among the networks linked between the terminals in use. Furthermore, the insertion loss, i.e., the attenuation value can be adjusted according to demand, and better return loss feature is obtained so as to reach more stable signal distribution and anti-interference characteristic. Therefore, the convenience in its total practical application is enhanced.
The present invention will be better understood by referring to the accompanying drawings, wherein:
The objects, the technical contents and the expected effectiveness of the present invention will become more apparent from the detailed description of the preferred embodiment in conjunction with the accompanying drawings.
With this structure, after the connection terminals (11) are connected by coaxial cables to a plurality of televisions or a variety of digital multimedia equipments, the signal characteristic measured by each connection terminal (11) is inspected by RF Network Analyzer. As shown in
Further, referring to
The abovementioned embodiment and drawings are not used to limit of the scope of the present invention. Equivalent variations and modifications made by the person skilled in the art without departing from the spirit and scope of the present invention are still considered to be further embodiments of the present invention.
Based on the foregoing, the multimedia network splitter of the present invention has the following advantages when comparing with the structure of conventional stuff.
Summing up above, the embodiment of the multimedia network splitter of this invention can reach expected effectiveness, and the specific configurations disclosed herein have yet not seen in the prior art of the same category of product, even has not been opened to the public before application.
