Antenna device and wireless communication apparatus
First Claim
1. An antenna device comprising:
- a first chip antenna including a first radiation electrode and a frequency variable circuit arranged to vary an electrical length of the first radiation electrode provided on a dielectric or magnetic base mounted on an upper side of a non-ground region of a substrate;
at least one antenna element including an additional radiation electrode provided on the base of the first chip antenna and an auxiliary element disposed on the upper side or an underside of the non-ground region and connected to the additional radiation electrode, and having a predetermined electrical length; and
a second chip antenna including a second radiation electrode disposed on the dielectric or magnetic base mounted on the upper side or underside of the non-ground region of the substrate, and having a predetermined electrical length.
1 Assignment
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Accused Products
Abstract
A compact and thin antenna device can be mounted in a small area of a substrate and has a multiband capability adaptable to various applications. The antenna device includes a chip antenna, an antenna element, and a chip antenna. The chip antenna is produced by forming a radiation electrode on the surface of a dielectric base, and mounting a frequency variable circuit on the radiation electrode. Thus, it becomes possible to obtain a resonant frequency f1 of the chip antenna and further to vary the resonant frequency f1. The antenna element is produced by adding an auxiliary element to an additional radiation electrode for the chip antenna. The chip antenna includes a radiation electrode on a dielectric base and a conductive pattern. Thus, a resonant frequency f2 and a resonant frequency f3 of the antenna element and the chip antenna, respectively, can be obtained.
43 Citations
12 Claims
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1. An antenna device comprising:
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a first chip antenna including a first radiation electrode and a frequency variable circuit arranged to vary an electrical length of the first radiation electrode provided on a dielectric or magnetic base mounted on an upper side of a non-ground region of a substrate; at least one antenna element including an additional radiation electrode provided on the base of the first chip antenna and an auxiliary element disposed on the upper side or an underside of the non-ground region and connected to the additional radiation electrode, and having a predetermined electrical length; and a second chip antenna including a second radiation electrode disposed on the dielectric or magnetic base mounted on the upper side or underside of the non-ground region of the substrate, and having a predetermined electrical length. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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Specification