Surface mounting antenna and communication apparatus using the same antenna
First Claim
1. A surface mounting antenna comprising:
- a parallelopiped substrate having first and second opposed main surfaces and four side surfaces each connecting the main surfaces;
a ground electrode disposed on substantially the overall area of the first main surface of said substrate;
a stripline radiation electrode having a free end and being disposed at least on the second main surface of said substrate and connected to said ground electrode; and
an excitation electrode disposed on a surface of said substrate and having a forward end;
a gap formed between the free end of said radiation electrode and the forward end of said excitation electrode.
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Accused Products
Abstract
A surface mounting antenna in which non-contact excitation can be achieved via a capacitor, and easy impedance matching can be provided even when the antenna is downsized. A communication apparatus loaded with the above antenna is also disclosed. A radiation electrode is disposed on the obverse surface of a substrate. A ground electrode is formed on substantially the overall area of the reverse surface of the substrate. The radiation electrode is connected at one end to the ground electrode via a first end surface of the substrate, and extends at the other end to the portion adjacent to a second end surface opposedly facing the first end surface so as to form a free end. An excitation electrode is disposed to face the forward end of the free end of the radiation substrate across a gap g and to extend from the obverse surface of the substrate to the reverse surface via the second end surface of the substrate.
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Citations
25 Claims
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1. A surface mounting antenna comprising:
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a parallelopiped substrate having first and second opposed main surfaces and four side surfaces each connecting the main surfaces; a ground electrode disposed on substantially the overall area of the first main surface of said substrate; a stripline radiation electrode having a free end and being disposed at least on the second main surface of said substrate and connected to said ground electrode; and an excitation electrode disposed on a surface of said substrate and having a forward end; a gap formed between the free end of said radiation electrode and the forward end of said excitation electrode. - View Dependent Claims (2, 3, 4)
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5. A surface mounting antenna comprising:
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a parallelopiped substrate having first and second opposed main surfaces and four side surfaces each connecting the main surfaces; a ground electrode disposed on substantially the overall area of the first main surface of said substrate; a stripline radiation electrode disposed on the second main surface of said substrate, and positioned at a first end adjacent to an edge of said substrate so as to form a free end and connected at a second end to said ground electrode; and an excitation electrode disposed near said edge of said substrate, facing said free end of said radiation electrode across a gap, and being disposed on a side surface of said substrate; wherein said excitation electrode and said radiation electrode are electromagnetically coupled to each other through a capacitor generated in said gap. - View Dependent Claims (6, 7, 8, 9)
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10. A surface mounting antenna comprising:
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a parallelopiped substrate having first and second opposed main surfaces and four side surfaces each connecting the main surfaces; a ground electrode disposed on substantially the overall area of the first main surface of said substrate; a stripline radiation electrode disposed on the second main surface of said substrate and extending at a first end to a first side surface of said substrate to form a free end and being connected at a second end to said ground electrode; and an excitation electrode disposed on said first side surface, facing said free end of said radiation electrode across a gap; wherein said excitation electrode and said radiation electrode are electromagnetically coupled to each other through a capacitor generated in said gap. - View Dependent Claims (11, 12)
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13. A communication apparatus provided with a surface mounting antenna, the antenna comprising:
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a parallelopiped substrate having first and second opposed main surfaces and four side surfaces each connecting the main surfaces; a ground electrode disposed on substantially the overall area of the first main surface of said substrate; a stripline radiation electrode having a free end and being disposed at least on the second main surface of said substrate and connected to said ground electrode; and an excitation electrode disposed on a side surface of said substrate and having a forward end; a gap formed between the free end of said radiation electrode and the forward end of said excitation electrode. - View Dependent Claims (14, 15, 16)
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17. A communication apparatus provided with a surface mounting antenna, the antenna comprising:
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a parallelopiped substrate having first and second opposed main surfaces and four side surfaces each connecting the main surfaces; a ground electrode disposed on substantially the overall area of the first main surface of said substrate; a stripline radiation electrode disposed on the second main surface of said substrate, and positioned at a first end adjacent to an edge of said substrate so as to form a free end and connected at a second end to said ground electrode; and an excitation electrode disposed near said edge of said substrate, facing said free end of said radiation electrode across a gap, and being guided to a side surface of said substrate; wherein said excitation electrode and said radiation electrode are electromagnetically coupled to each other through a capacitor generated in said gap. - View Dependent Claims (18, 19, 20, 21)
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22. A communication apparatus loaded with a surface mounting antenna, the antenna comprising:
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a parallelopiped substrate having first and second opposed main surfaces and four side surfaces each connecting the main surfaces; a ground electrode disposed on substantially the overall area of the first main surface of said substrate; a stripline radiation electrode disposed on the second main surface of said substrate and extending at a first end to a first side surface of said substrate to form a free end and being connected at a second end to said ground electrode; and an excitation electrode disposed on said first side surfaces facing said free end of said radiation electrode across a gap; wherein said excitation electrode and said radiation electrode are electromagnetically coupled to each other through a capacitor generated in said gap. - View Dependent Claims (23, 24, 25)
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Specification