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US 12,451,856 B2Granted
Branching filter
AssigneeTDK Corporation
InventorToshiyuki Takami
Life of this patent
Estimating the term…
Abstract
A branching filter includes a first diplexer, a second diplexer, and a third diplexer. An input end of the first diplexer is connected to an input port. An input end of the second diplexer and an input end of the third diplexer are connected to two output ends of the first diplexer, respectively. Two output ends of the second diplexer are connected to first and second output ports, respectively. Two output ends of the third diplexer are connected to third and fourth output ports, respectively.
Claims9
A branching filter comprising:
- an input port;
- a first output port;
- a second output port;
- a third output port;
- a fourth output port;
- a first diplexer including a first input end connected to the input port, a first output end, and a second output end;
- a second diplexer including a second input end directly connected to the first output end, a third output end directly connected to the first output port, and a fourth output end directly connected to the second output port;
- and
- a third diplexer including a third input end directly connected to the second output end, a fifth output end directly connected to the third output port, and a sixth output end directly connected to the fourth output port, wherein
- the first output port is a port that selectively passes a signal of a frequency within a first passband toward an outside of the branching filter,
- the second output port is a port that selectively passes a signal of a frequency within a second passband higher than the first passband toward the outside of the branching filter,
- the third output port is a port that selectively passes a signal of a frequency within a third passband higher than the second passband toward the outside of the branching filter, and
- the fourth output port is a port that selectively passes a signal of a frequency within a fourth passband higher than the third passband toward the outside of the branching filter.
10 more elements
A branching filter comprising:
- an input port;
- a first output port;
- a second output port;
- a third output port;
- a fourth output port;
- a first diplexer including a first input end connected to the input port, a first output end, and a second output end;
- a second diplexer including a second input end connected to the first output end, a third output end directly connected to the first output port, and a fourth output end directly connected to the second output port;
- and
- a third diplexer including a third input end connected to the second output end,
- a fifth output end directly connected to the third output port, and a sixth output end directly connected to the fourth output port, wherein
- a first filter is formed between the input port and the first output port,
- a second filter is formed between the input port and the second output port,
- a third filter is formed between the input port and the third output port,
- a fourth filter is formed between the input port and the fourth output port, and
- when a filter with a largest number of stages is used as a first specific filter and a filter with a smallest number of stages is used as a second specific filter, among the first filter, the second filter, the third filter, and the fourth filter, a difference between the number of stages of the first specific filter and the number of stages of the second specific filter is five.
12 more elements
Dependencies are inferred from the claim text.