Radio Frequency Filter
First Claim
1. A Radio Frequency (RF) filter comprising:
- a coupler for receiving an input signal through a first port, dividing the input signal, outputting the divided signals through second and third ports, combining signals received through the second and third ports according to phases of the signals, and outputting the combined signal through the first port or as an output signal of the RF filter through a fourth port; and
a first filter unit having a first port connected to the second port of the coupler and a second port connected to the third port of the coupler, for having a predetermined frequency filtering characteristic.
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Accused Products
Abstract
A Radio Frequency (RF) filter configured by combining a hybrid coupler with a general filter, for having different characteristics from original characteristics of a general filter is provided, in which a coupler receives an input signal through a first port, divides the input signal, outputs the divided signals through second and third ports, combines signals received through the second and third ports according to phases of the signals, and outputs the combined signal through the first port or as an output signal of the RF filter through a fourth port, and a first filter unit has a first port connected to the second port of the coupler and a second port connected to the third port of the coupler, for having a predetermined frequency filtering characteristic.
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Citations
15 Claims
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1. A Radio Frequency (RF) filter comprising:
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a coupler for receiving an input signal through a first port, dividing the input signal, outputting the divided signals through second and third ports, combining signals received through the second and third ports according to phases of the signals, and outputting the combined signal through the first port or as an output signal of the RF filter through a fourth port; and a first filter unit having a first port connected to the second port of the coupler and a second port connected to the third port of the coupler, for having a predetermined frequency filtering characteristic. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15)
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Specification