Switch filter having selectively interconnected filter stages and ports
First Claim
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1. A switch filter comprising:
- a plurality of filter stages connected between a plurality of ports of said switch filter, anda plurality of switches configured to selectively interconnect said plurality of filter stages, wherein said plurality of switches are connected internally to said plurality of filter stages and are configured to selectively interconnect said plurality of ports of said switch filter.
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Abstract
A switch filter is disclosed wherein switches are incorporated into the filter and divide the filter into various half-filters. The switch filter includes parallel and series LC circuits, switches, two input ports and two output ports where the input and output ports can be selectively coupled to each other. The switches are diodes or FETs, for example, that are switched via the presence or absence of control signals, such as a logic high or a logic low.
86 Citations
20 Claims
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1. A switch filter comprising:
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a plurality of filter stages connected between a plurality of ports of said switch filter, and a plurality of switches configured to selectively interconnect said plurality of filter stages, wherein said plurality of switches are connected internally to said plurality of filter stages and are configured to selectively interconnect said plurality of ports of said switch filter. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15)
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16. A switch filter comprising:
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a plurality of ports, a plurality of switches, wherein each one of said plurality of switches has a first terminal connected together, and a plurality of filter stages, wherein a first terminal of each one of said plurality of filter stages is connected to one of said plurality of ports, and wherein a second terminal of each of said plurality of filter stages is connected to a second terminal of said plurality of switches, wherein said plurality of switches selectively interconnect said plurality of ports of said switch filter.
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17. A switch filter comprising:
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a plurality of ports, a plurality of switches, wherein each one of said plurality of switches has a first terminal connected together, and a plurality of filter stages, wherein a first terminal of each one of said plurality of filter stages is connected to one of said plurality of ports, and wherein a second terminal of each of said plurality of filter stages is connected to a second terminal of said plurality of switches, wherein said plurality of switches are configured to selectively interconnect said plurality of filter stages in a manner to selectively connect said ports of said switch filter.
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18. A switch filter for a communication system, comprising:
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a plurality of switches, a first half filter connected between a first port of said switch filter and a first terminal of a first switch of said plurality of switches, a second half filter connected between a second port of said switch filter and a first terminal of a second switch of said plurality of switches, a third half filter connected between a third port of said switch filter and a first terminal of a third switch of said plurality of switches, a fourth half filter connected between a fourth port of said switch filter and a first terminal of a fourth switch of said plurality of switches, wherein second terminals of said first, second, third and fourth switches are connected together.
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19. A switch filter comprising:
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a plurality of input and output ports, a first plurality of half-filters, including one first half-filter connected to each input port, a second plurality of half-filters, including one second half-filter connected to each output port, and a switch for selectively connecting one of said first half-filters to one of said second half-filters.
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20. A transceiver comprising:
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first and second antennas, a receiver, a transmitter, and a switch filter for selectively interconnecting said receiver and said transmitter to said first and second antennas, said switch filter comprising; a first plurality of half-filters, including one first half-filter connected to said transmitter and one first half-filter connected to said receiver, a second plurality of half-filters, including one second half-filter connected to said first antenna and one second half-filter connected to said second antenna, and a switch for selectively connecting one of said first half-filters to one of said second half-filters.
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Specification
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Current AssigneeIndustrial Technology Research Institute
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Original AssigneeIndustrial Technology Research Institute
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InventorsJou, Chewnpu
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Primary Examiner(s)Eisenzopf, Reinhard J.
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Assistant Examiner(s)BANKS HAROLD, MARSHA DENISE
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Application NumberUS08/407,897Time in Patent Office770 DaysField of Search455/78, 455/79, 455/80, 455/82, 455/83, 333/167, 333/168, 333/174, 333/101, 333/175, 333/103, 333/104, 333/126, 333/129, 333/132, 333/134, 333/202, 333/205, 333/207, 333/209, 381/100US Class Current455/78CPC Class CodesH04B 1/44 Transmit/receive switchingH04B 1/52 Hybrid arrangements, i.e. a...
