Antenna switching equipment
First Claim
1. An antenna switching equipment for switching between antennas used for a reader/writer in an RFID system, comprising:
- a plurality of antenna ports;
a power supply unit for generating electric power from an RF signal outputted from the reader/writer;
a switching signal generation unit, operating on electric power generated by the power supply unit, for generating a switching signal which specifies an antenna port to be used from among the plurality of antenna ports; and
a switching unit, operating on electric power generated by the power supply unit, for switching a connection between the reader/writer and the plurality of antenna ports based on a switching signal generated by the switching signal generation unit.
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Accused Products
Abstract
Antenna switching equipment switches antennas for a reader/writer. A power generation unit generates electric power from an RF signal outputted from the reader/writer. A switching signal generation unit, operating on electric power generated by the power generation unit, generates a switching signal for specifying an antenna port to be used from among a plurality of antenna ports. A high frequency switch unit, operating on electric power generated by the power generation unit, switches a connection between the reader/writer and one of a plurality of antenna ports based on a switching signal generated by the switching signal generation unit.
20 Citations
7 Claims
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1. An antenna switching equipment for switching between antennas used for a reader/writer in an RFID system, comprising:
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a plurality of antenna ports;
a power supply unit for generating electric power from an RF signal outputted from the reader/writer;
a switching signal generation unit, operating on electric power generated by the power supply unit, for generating a switching signal which specifies an antenna port to be used from among the plurality of antenna ports; and
a switching unit, operating on electric power generated by the power supply unit, for switching a connection between the reader/writer and the plurality of antenna ports based on a switching signal generated by the switching signal generation unit. - View Dependent Claims (2, 3, 4, 5)
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6. An antenna for an RFID reader/writer comprising an antenna switching equipment therein for switching the antenna for the reader/writer in an RFID system, comprising:
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one or more add-on antenna ports for connecting an additional antenna;
a power supply unit for generating electric power from an RF signal outputted from the reader/writer;
a switching signal generation unit, operating on electric power generated by the power supply unit, for generating a switching signal which specifies an antenna port to be used from among the plurality of antenna ports including the add-on antenna port; and
a switching unit, operating on electric power generated by the power supply unit, for switching a connection between the reader/writer and the plurality of antenna ports including the add-on antenna port based on a switching signal generated by the switching signal generation unit.
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7. An antenna for an RFID reader/writer comprising an antenna switching equipment therein for switching the antenna for the reader/writer in an RFID system, comprising:
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a plurality of antenna ports;
a power supply unit for generating electric power from an RF signal outputted from the reader/writer;
a switching signal generation unit, operating on electric power generated by the power supply unit, for generating a switching signal which specifies an antenna port to be used from among the plurality of antenna ports; and
a switching unit, operating on electric power generated by the power supply unit, for switching a connection between the reader/writer and the plurality of antenna ports based on a switching signal generated by the switching signal generation unit, wherein an add-on antenna is connected to at least one of the plurality of antenna ports.
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Specification