RF signal amplifier with combined active and passive port
The present invention is directed to a bi-directional RF signal amplifier that includes both an active communications path and a passive communications path. The circuitry is simplified and the housing size is reduced by having one port which functions as part of the active communications path when the bi-directional RF signal amplifier is powered, and that functions as part of the passive communications path when the bi-directional RF signal amplifier is unpowered.
1. A bi-directional RF signal amplifier comprising:
a RF input port;
a power divider network having at least one power divider leading to a plurality of outputs from said power divider network;
a plurality of RF output ports, each RF output port coupled to a respective one of said plurality of outputs from said power divider network;
an active communications path connecting said RF input port to said power divider network, said active communications path including a power amplifier;
a switch located between said RF input port and said active communications path, said switch having a first terminal coupled to said RF input port, a second terminal coupled to said active communications path, and a third terminal;
a passive communications path connecting said third terminal of said switch to one of said plurality of RF output ports, wherein said passive communications path does not pass through said power divider network, wherein when power is supplied to said switch, said first terminal of said switch is connected to said second terminal of said switch and when power is not supplied to said switch said first terminal of said switch is connected to said third terminal of said switch; and
a filter functioning as a MoCA rejection filter and coupled between said power divider network and said RF input port.
2. The bi-directional RF signal amplifier according to claim 1 , wherein said switch is a first switch and further comprising:
a second switch located between said passive communications path and said one of said plurality of RF output ports, said second switch having a first terminal coupled to said one of said plurality of RF output ports, a second terminal coupled to an output of said power divider network and a third terminal coupled to said passive communications path, wherein when power is supplied to said second switch, said first terminal of said second switch is connected to said second terminal of said second switch, and when power is not supplied to said second switch, said first terminal of said second switch is connected to said third terminal of said second switch.
3. The bi-directional RF signal amplifier according to claim 2 , wherein said active communications path further includes a first diplexer and a second diplexer, and wherein said power amplifier is located between said first diplexer and said second diplexer.
4. The bi-directional RF signal amplifier according to claim 3 , wherein said first diplexer has a common port, a high frequency port and a low frequency port, and wherein said second terminal of said switch is directly coupled to said common port of said first diplexer without any intervening circuit element.
5. The bi-directional RF signal amplifier according to claim 4 , wherein said second diplexer has a common port, a high frequency port and a low frequency port, and wherein an input to said power amplifier is directly coupled to said high frequency port of said first diplexer and an output of said power amplifier is directly coupled to said high frequency port of said second diplexer.
6. The bi-directional RF signal amplifier according to claim 1 , wherein said plurality of RF output ports are formed as female coaxial ports.
7. The bi-directional RF signal amplifier according to claim 2 , wherein said filter is coupled between said power divider network and said active communications path.
8. The bi-directional RF signal amplifier according to claim 7 , wherein said filter is a first filter, and further comprising:
a second filter functioning as a MoCA rejection filter coupled between said third terminal of said second switch and said third terminal of said first switch.
9. The bi-directional RF signal amplifier according to claim 1 , wherein said filter is coupled between said first terminal of said first switch and said RF input port.
10. A bi-directional RF signal amplifier comprising:
a RF input port;
a power divider network having at least one power divider leading to a plurality of outputs from said power divider network;
a plurality of RF output ports, each RF output port coupled to a respective one of said plurality of outputs from said power divider network;
an active communications path connecting said RF input port to said power divider network, said active communications path including a power amplifier;
a switch located between said RF input port and said active communications path, said switch having a first terminal coupled to said RF input port, a second terminal coupled to said active communications path, and a third terminal; and
a passive communications path connecting said RF input port to one of said plurality of RF output ports, wherein when power is supplied to said switch, said first terminal of said switch is connected to said second terminal of said switch and when power is not supplied to said switch, said first terminal of said switch is connected to said third terminal of said switch and said third terminal of said switch is connected to a resistor which is in turn connected to ground.
11. The bi-directional RF signal amplifier according to claim 10 , further comprising:
a directional coupler having first, second and third terminals, said first terminal of said directional coupler being connected to said RF input port, said second terminal of said directional coupler being connected to said first terminal of said switch and said third terminal of said directional coupler being connected to said passive communications path.
12. The bi-directional RF signal amplifier according to claim 11 , wherein said switch is a first switch and further comprising:
a second switch located between said passive communications path and said one of said plurality of RF output ports, said second switch having a first terminal coupled to said one of said plurality of RF output ports, a second terminal coupled to an output of said power divider network and a third terminal coupled to said passive communications path, wherein when power is supplied to said second switch, said first terminal of said second switch is connected to said second terminal of said second switch, and when power is not supplied to said second switch, said first terminal of said second switch is connected to said third terminal of said second switch.
13. The bi-directional RF signal amplifier according to claim 12 , wherein said active communications path further includes a first diplexer and a second diplexer, wherein said first diplexer has a common port, a high frequency port and a low frequency port, wherein said second terminal of said switch is directly coupled to a common port of said first diplexer without any intervening circuit element, wherein said second diplexer has a common port, a high frequency port and a low frequency port, and wherein an input to said power amplifier is directly coupled to said high frequency port of said first diplexer and an output of said power amplifier is directly coupled to said high frequency port of said second diplexer.
14. The bi-directional RF signal amplifier according to claim 12 , further comprising:
a filter functioning as a MoCA rejection filter and coupled between said power divider network and said RF input port.
15. The bi-directional RF signal amplifier according to claim 14 , wherein said filter is a first filter, wherein said first filter is coupled between said power divider network and said active communications path, and further comprising:
a second filter functioning as a MoCA rejection filter coupled between said third terminal of said second switch and said third terminal of said first switch.
16. The bi-directional RF signal amplifier according to claim 14 , wherein said filter is coupled between said first terminal of said first switch and said RF input port.
17. A bi-directional RF signal amplifier comprising:
a RF input port;
a power divider network having at least one power divider leading to a plurality of outputs from said power divider network;
a plurality of RF output ports, each RF output port coupled to a respective one of said plurality of outputs from said power divider network;
an active communications path connecting said RF input port to said power divider network, said active communications path including a power amplifier;
a passive communications path connecting said RF input port to one of said plurality of RF output ports;
a switch located between said one of said RF output ports and said passive communications path, said switch having a first terminal coupled to said one of said RF output ports, a second terminal coupled to one of said outputs from said power divider network, and a third terminal coupled to said passive communications path, wherein when power is supplied to said switch, said first terminal of said switch is connected to said second terminal of said switch and when power is not supplied to said switch, said first terminal of said switch is connected to said third terminal of said switch; and
a directional coupler having first, second and third terminals, said first terminal of said directional coupler being connected to said RF input port, said second terminal of said directional coupler being connected to said active communications path, and said third terminal of said directional coupler being connected to said passive communications path.
18. The bi-directional RF signal amplifier according to claim 17 , further comprising:
a first filter, functioning as a MoCA rejection filter, located between said active communications path and said power divider network; and
a second filter, functioning as a MoCA rejection filter, located between said third terminal of said directional coupler and said third terminal of said switch.
19. The bi-directional RF signal amplifier according to claim 17 , further comprising:
a filter located between said RF input port and said directional coupler, and filter functioning as a MoCA rejection filter.