Radio frequency IC device and method of manufacturing the same
First Claim
1. A radio frequency IC device comprising:
- a radio frequency IC element including an input/output electrode;
a first base including an intermediate electrode; and
a second base including a radiation electrode;
whereinthe intermediate electrode is capacitively coupled to the input/output electrode via a first capacitance having a capacitance value C1;
the radiation electrode is capacitively coupled to the intermediate electrode via a second capacitance having a capacitance value C2;
the first capacitance and the second capacitance are connected in series with one another between the radio frequency IC element and the radiation electrode; and
the capacitance value C2 is greater than the capacitance value C1.
1 Assignment
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Accused Products
Abstract
A radio frequency IC device that prevents variations in the value of capacitive coupling between a radio frequency IC element and a radiation electrode and has good signal transmission efficiency includes a radio frequency IC element including input/output electrodes and, a first base including intermediate electrodes that are capacitively coupled to the input/output electrodes and have capacitance values C1a and C1b, respectively, and a second base including radiation electrodes and that are capacitively coupled to the intermediate electrodes and have capacitance values C2a and C2b, respectively. A capacitance C1 obtained by combining C1a and C1b is smaller than a capacitance C2 obtained by combining C2a and C2b.
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Citations
9 Claims
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1. A radio frequency IC device comprising:
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a radio frequency IC element including an input/output electrode; a first base including an intermediate electrode; and a second base including a radiation electrode;
whereinthe intermediate electrode is capacitively coupled to the input/output electrode via a first capacitance having a capacitance value C1; the radiation electrode is capacitively coupled to the intermediate electrode via a second capacitance having a capacitance value C2; the first capacitance and the second capacitance are connected in series with one another between the radio frequency IC element and the radiation electrode; and the capacitance value C2 is greater than the capacitance value C1. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A radio frequency IC device manufacturing method comprising:
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a step of mounting a radio frequency IC element including an input/output electrode on a first base including an intermediate electrode and capacitively coupling the input/output electrode and the intermediate electrode via a first capacitance having a capacitance value C1; a step of mounting the first base, on which the radio frequency IC element is mounted, on a second base including a radiation electrode and capacitively coupling the intermediate electrode and the radiation electrode via a second capacitance having; a step of connecting the first capacitance and the second capacitance in series with one another between the radio frequency IC element and the radiation electrode; and a step of setting the capacitance value C2 to be greater than the capacitance value C1.
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Specification