CATV face plate device and method with extended frequency range
A face plate for cable-TV networks, the face plate adapted to operate in frequencies as high as 1.8 GHz. The face plate comprising terminals, electronic circuitry, impedance matching units and a disturbances suppressor. The disturbances suppressor is designed to suppress the parasitic resonance of the transmission line that appears inside the extended operational frequency band of 1000 to 1800 MHz. The impedance matching units are adapted to match the impedance of the terminal with that of electronic circuitry.
1. A face plate comprising:
two terminals;
electronic circuitry;
two impedance matching units, each connected to one of said terminals and to said electronic circuitry, said impedance matching units to match the impedance of said terminals with that of said electronic circuitry; and
a disturbances suppressor mounted on said face plate, said disturbances suppressor to suppress parasitic resonance of a transmission line mounted on a distribution box,
wherein said face plate adopted to be installed onto said distribution box.
2. The face plate of claim 1 , wherein said disturbances suppressor to suppress parasitic resonance of a transmission line mounted on a distribution box, said parasitic resonance appears in frequency band of 1000 to 1800 MHz.
3. The face plate of claim 1 , wherein said disturbances suppressor is a “U” shape ferrite material body.
4. The face plate of claim 3 , wherein said transmission line comprises a main body and wherein said disturbances suppressor is placed adjacent to and covering said main body.
5. The face plate of claim 1 , wherein said impedance matching units are L-C networks.
6. The face plate of claim 5 , wherein said L-C networks comprise:
two inductors in series to the RF signal;
at least one capacitor connecting to a ground line; and
a stub to provide additional capacitance reactivity.
7. The face plate of claim 6 , wherein said stub dimensions are 1×12 mm and wherein said stub is located in a distance of 1.6 mm from a parallel ground layer.