Directional coupler assembly
AssigneeMiniRF, Inc.
InventorRudolph J. Menna
Life of this patent
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Abstract
An apparatus includes a plurality of ports, a directional coupler transformer and an impedance circuit. The directional coupler transformer may be configured to (i) receive a forward input signal from a first port of the plurality of ports, (ii) generate a coupled signal at a second port of the plurality of ports, (iii) generate a forward output signal and receive a return signal at a third port of the plurality of ports and (iv) generate an internal signal at an internal node. The impedance circuit may be directly connected to the internal node and configured to direct the internal signal to a signal ground to control an isolation between the forward input signal and the return input signal. The isolation is controlled by an impedance of the impedance circuit.
Claims20
A method for directional coupling, comprising the steps of:
- receiving a forward input signal at a first port;
- generating a coupled signal at a second port;
- generating a forward output signal at a third port;
- receiving a return input signal at said third port;
- generating an internal signal at an internal node using a directional coupler transformer;
- and
- directing said internal signal to a signal ground through an impedance using an impedance circuit directly connected to said internal node to control an isolation between said forward input signal and said return input signal, wherein (i) said isolation is controlled by said impedance of said impedance circuit and (ii) said impedance of said impedance circuit is greater than or less than an input impedance at each of said first port, said second port and said third port.
An apparatus comprising:
- a plurality of ports;
- a directional coupler transformer configured to (i) receive a forward input signal from a first port of said plurality of ports, (ii) generate a coupled signal at a second port of said plurality of ports, (iii) generate a forward output signal and receive a return input signal at a third port of said plurality of ports and (iv) generate an internal signal at an internal node;
- and
- an impedance circuit directly connected to said internal node and configured to direct said internal signal to a signal ground to control an isolation between said forward input signal and said return input signal, wherein (i) said isolation is controlled by an impedance of said impedance circuit and (ii) said impedance of said impedance circuit is greater than or less than an input impedance of said apparatus at each of said first port, said second port and said third port.
An apparatus comprising:
- a plurality of ports;
- a directional coupler transformer configured to (i) receive a forward input signal from a first port of said plurality of ports, (ii) generate a coupled signal at a second port of said plurality of ports, (iii) generate a forward output signal and receive a return input signal at a third port of said plurality of ports and (iv) generate an internal signal at an internal node;
- an impedance circuit directly connected to said internal node and configured to direct said internal signal to a signal ground to control an isolation between said forward input signal and said return input signal;
- and
- a second impedance circuit directly connected between said second port and said signal ground, wherein (i) said isolation is controlled by an impedance of said impedance circuit and (ii) said second impedance circuit comprises a low-pass filter circuit.
An apparatus comprising:
- a plurality of ports;
- a directional coupler transformer configured to (i) receive a forward input signal from a first port of said plurality of ports, (ii) generate a coupled signal at a second port of said plurality of ports, (iii) generate a forward output signal and receive a return input signal at a third port of said plurality of ports and (iv) generate an internal signal at an internal node;
- and
- an impedance circuit directly connected to said internal node and configured to (i) direct said internal signal to a signal ground to control an isolation between said forward input signal and said return input signal and (ii) generate an isolation signal at a fourth port of said plurality of ports directly connected to said impedance circuit, wherein (a) said isolation is controlled by an impedance of said impedance circuit and (b) said impedance circuit comprises a transformer connected to said internal node, said fourth port and said signal ground.
Dependencies are inferred from the claim text.