System and Method for a Directional Coupler
First Claim
1. A method of operating a directional coupler, the method comprising:
- determining a coupled power variation byapplying an input signal at an input port of the directional coupler,applying a first impedance at a transmitted port of the directional coupler,measuring a first coupled power at a coupled port of the directional coupler after applying the first impedance,applying a second impedance at the transmitted port of the directional coupler,measuring a second coupled power after applying the second impedance, anddetermining a difference between the first coupled power and the second coupled power to form the coupled power variation.
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Accused Products
Abstract
In accordance with an embodiment, a method of operating a directional coupler includes determining a coupled power variation by applying an input signal at an input port of the directional coupler, applying a first impedance at a transmitted port of the directional coupler, measuring a first coupled power at a coupled port of the directional coupler after applying the first impedance, applying a second impedance at the transmitted port of the directional coupler, measuring a second coupled power after applying the second impedance, and determining a difference between the first coupled power and the second coupled power to form the coupled power variation.
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Citations
29 Claims
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1. A method of operating a directional coupler, the method comprising:
determining a coupled power variation by applying an input signal at an input port of the directional coupler, applying a first impedance at a transmitted port of the directional coupler, measuring a first coupled power at a coupled port of the directional coupler after applying the first impedance, applying a second impedance at the transmitted port of the directional coupler, measuring a second coupled power after applying the second impedance, and determining a difference between the first coupled power and the second coupled power to form the coupled power variation. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15)
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16. A directional coupler system comprising:
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a directional coupler; a power detector coupled to a coupled port of the directional coupler; and a switchable impedance circuit coupled to a transmitted port of the directional coupler, the switchable impedance circuit configured to switchably apply a first impedance to the transmitted port and a second impedance to the transmitted port according to a control input. - View Dependent Claims (17, 18, 19, 20, 21, 22, 23, 24)
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25. A circuit comprising:
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a first directional coupler comprising a first input port, a first transmitted port, a first isolated port and a first coupled port; and a second directional coupler comprising a second input port coupled to the first transmitted port of the first directional coupler, a second transmitted port, a second isolated port and a second coupled port; a switchable impedance circuit coupled to the second transmitted port of the second directional coupler, the switchable impedance circuit configured to switchably apply a first impedance to the second transmitted port and a second impedance to the second transmitted port; a switching network configured to route one of the first isolated port, the first coupled port, the second isolated port and the second coupled port to an output of the switching network; a power detector coupled to the output of the switching network; and a bypass switch configured to route one of the output of the switching network and the output of the power detector to an output pin. - View Dependent Claims (26, 27, 28, 29)
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Specification