Radio frequency IC device and radio communication system
First Claim
1. A radio frequency IC device comprising:
- a radio IC;
an annular electrode coupled to the radio IC and including at least a pair of end portions; and
a dipole radiation plate coupled to the annular electrode;
whereina resonant frequency of the annular electrode is lower than a resonant frequency of the dipole radiation plate;
both of the annular electrode and the dipole radiation plate define antenna elements;
the annular electrode is a magnetic-field antenna element that communicates data of the radio IC using the lower resonant frequency; and
the dipole radiation plate is an electric-field antenna element that communicates data of the radio IC using the higher resonant frequency.
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Accused Products
Abstract
A radio frequency IC device achieves impedance matching between a radio IC chip and a radiation plate in a wide frequency band, and achieves desired radiation characteristics over a wide range of frequencies. A radio frequency IC device and a radio communication system allow both long-distance and short-distance communication and, in particular, allow short-distance communication using a small amount of energy. The radio frequency IC device includes an electromagnetic coupling module including a radio IC chip and a feed circuit board, and a radiation plate. An annular electrode is arranged to be coupled to both a feed circuit of the electromagnetic coupling module and the radiation plate. The radiation plate defines an electric-field radiation plate for long-distance communication, while the annular electrode defines a magnetic-field radiation plate for short-distance communication. The feed circuit board may be removed, so that the radio IC chip is coupled to the annular electrode directly or with an interposer disposed therebetween.
202 Citations
32 Claims
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1. A radio frequency IC device comprising:
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a radio IC; an annular electrode coupled to the radio IC and including at least a pair of end portions; and a dipole radiation plate coupled to the annular electrode;
whereina resonant frequency of the annular electrode is lower than a resonant frequency of the dipole radiation plate; both of the annular electrode and the dipole radiation plate define antenna elements; the annular electrode is a magnetic-field antenna element that communicates data of the radio IC using the lower resonant frequency; and the dipole radiation plate is an electric-field antenna element that communicates data of the radio IC using the higher resonant frequency. - View Dependent Claims (5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 32)
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2. A radio frequency IC device comprising:
- a radio IC;
an interposer coupled to the radio IC and including a line electrode located on at least one principal surface of a base and/or inside the base; an annular electrode including at least a pair of end portions; and
a dipole radiation plate coupled to the annular electrode;
whereinthe line electrode is coupled to at least one of the annular electrode and the radiation plate; a resonant frequency of the annular electrode is lower than a resonant frequency of the dipole radiation plate; both of the annular electrode and the dipole radiation plate define antenna elements; the annular electrode is a magnetic-field antenna element that communicates data of the radio IC using the lower resonant frequency; and the dipole radiation plate is an electric-field antenna element that communicates data of the radio IC using the higher resonant frequency.
- a radio IC;
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3. A radio frequency IC device comprising:
- a radio IC;
a feed circuit coupled to the radio IC, and including a resonant circuit including an inductance element and having a predetermined resonant frequency; an annular electrode including at least a pair of end portions and electromagnetically coupled to the feed circuit at the pair of end portions; and a dipole radiation plate coupled to the annular electrode;
whereina resonant frequency of the annular electrode is lower than a resonant frequency of the dipole radiation plate; both of the annular electrode and the dipole radiation plate define antenna elements; the annular electrode is a magnetic-field antenna element that communicates data of the radio IC using the lower resonant frequency; and the dipole radiation plate is an electric-field antenna element that communicates data of the radio IC using the higher resonant frequency. - View Dependent Claims (4, 15)
- a radio IC;
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16. A radio frequency IC device comprising:
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a radio IC; a magnetic-field radiation plate coupled to the radio IC and including at least a pair of end portions, the magnetic-field radiation plate communicates data of the radio IC using a resonant frequency of the magnetic-field radiation plate; and an electric-field radiation plate coupled to the magnetic-field radiation plate, the electric-field radiation plate communicates data of the radio IC using a resonant frequency of the electric-field radiation plate;
whereinthe resonant frequency of the magnetic-field radiation plate is lower than the resonant frequency of the electric-field radiation plate. - View Dependent Claims (20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30)
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17. A radio frequency IC device comprising:
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a radio IC; an interposer coupled to the radio IC and including a line electrode located on at least one principal surface of a base and/or inside the base; a magnetic-field radiation plate including at least a pair of end portions, the magnetic-field radiation plate communicates data of the radio IC using a resonant frequency of the magnetic-field radiation plate; and an electric-field radiation plate coupled to the magnetic-field radiation plate, the electric-field radiation plate communicates data of the radio IC using a resonant frequency of the electric-field radiation plate;
whereinthe line electrode is coupled to at least one of the magnetic-field radiation plate and the electric-field radiation plate;
whereinthe resonant frequency of the magnetic-field radiation plate is lower than the resonant frequency of the electric-field radiation plate.
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18. A radio frequency IC device comprising:
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a radio IC; a feed circuit coupled to the radio IC, and including a resonant circuit including an inductance element and having a predetermined resonant frequency; a magnetic-field radiation plate including at least a pair of end portions and electromagnetically coupled to the feed circuit at the pair of end portions, the magnetic-field radiation plate communicates data of the radio IC using a resonant frequency of the magnetic-field radiation plate; and an electric-field radiation plate coupled to the magnetic-field radiation plate, the electric-field radiation plate communicates data of the radio IC using a resonant frequency of the electric-field radiation plate;
whereinthe resonant frequency of the magnetic-field radiation plate is lower than the resonant frequency of the electric-field radiation plate. - View Dependent Claims (19, 31)
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Specification