Microwave transponder
First Claim
1. Radio transponder for reception and retransmission of electromagnetic energy, which transponder comprises:
- an antenna connection,a control circuit for modulation,a detector,a delay element,a first semiconductor switch,a second semiconductor switch, andwherein the control circuit for modulation is arranged to control the first and second semiconductor switches independently in such a way that a signal that comes in via the antenna connection can be caused to be reflected on either side of the delay element or to pass through this to the detector.
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Accused Products
Abstract
The invention relates to a radio transponder (200) for reception and retransmission of electromagnetic energy, particularly in the microwave range. The transponder comprises a connection (210) to an antenna, a control circuit for modulation (260), a detector (250), a delay element (240) and a first semiconductor switch (220). The transponder comprises, in addition, a second semiconductor switch (230), and the control circuit for modulation (260) is arranged to be able to control the semiconductor switches (220, 230) independently in such a way that a signal that comes in via the antenna connection (210) can be caused to be reflected on either side of the delay element (240) or to pass through this to the detector (250). At least one of the semiconductor switches (220, 230) is suitably a diode or a transistor.
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Citations
16 Claims
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1. Radio transponder for reception and retransmission of electromagnetic energy, which transponder comprises:
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an antenna connection, a control circuit for modulation, a detector, a delay element, a first semiconductor switch, a second semiconductor switch, and wherein the control circuit for modulation is arranged to control the first and second semiconductor switches independently in such a way that a signal that comes in via the antenna connection can be caused to be reflected on either side of the delay element or to pass through this to the detector. - View Dependent Claims (2, 3, 4, 5, 6)
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7. Method for receiving radio signals primarily in the microwave range in a radio transponder, comprising:
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utilizing a connection to a single antenna, and controlling a control circuit to bring about one of the following three options for a received signal; direct retransmission, modulated retransmission, detection in a detector. - View Dependent Claims (8, 9, 10)
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11. A method for receiving microwave electromagnetic signals, comprising:
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receiving a signal at a connection to a single antenna; and controlling the path of the signal to either pass through a delay element or bypass the delay element through a first controllable switch and a second controllable switch, wherein controlling includes enabling one of direct retransmission, modulated retransmission, and detection in a detector. - View Dependent Claims (12, 13, 14, 15, 16)
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Specification