Broadband Coupling Filter
AssigneeRalink Technology Corporation
InventorMin-Chung Wu
Life of this patent
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Abstract
A broadband coupling filter for generating a notch filtering effect is disclosed. In the broadband coupling filter, a substrate includes a first layer, a second layer and a third layer. A first signal terminal, a second signal terminal, and a block transmission line are formed in the first layer, wherein the first signal terminal is used for receiving a signal, and the second signal terminal is used for outputting a filtering result of the signal. A grounding plate is formed in the second layer, having a hole. A third signal terminal, a forth signal terminal and a second block transmission line are formed in the third layer. A connection unit is further formed in the third layer, for connecting the third signal terminal and the forth signal terminal.
Claims6
A broadband coupling filter, comprising:
- a substrate, comprising a first layer, a second layer and a third layer, wherein the second layer is between the first layer and the third layer;
- a first signal terminal, formed in the first layer of the substrate;
- a second signal terminal, formed in the first layer of the substrate;
- a third signal terminal, formed in the third layer of the substrate;
- a fourth signal terminal, formed in the third layer of the substrate;
- a grounding plate, formed in the second layer of the substrate, and having a hole;
- a first block transmission line, formed at a position corresponding to the hole in the first layer of the substrate, and coupled to the first signal terminal and the second signal terminal;
- a second block transmission line, formed at a position corresponding to the hole in the third layer of the substrate, and coupled to the third signal terminal and the fourth signal terminal, and having a shape identical to a shape of the first block transmission line;
- and
- a connection unit, formed in the third layer of the substrate, for connecting the third signal terminal and the fourth signal terminal;
- wherein the first signal terminal is utilized for receiving a signal, and the second signal terminal is utilized for outputting a filtering result of the signal.
Dependencies are inferred from the claim text.