Antenna
AssigneeCasio Computer Co., Ltd.
InventorsYutaka Aoki, Kazuhiko Honjo, Akira Saitou
Life of this patent
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Abstract
A miniature variable-beam microwave antenna (1) comprises antenna conductors (100a, 100b), an EBG conductor (120), a variable reactance element (130), and an adjusting part (150). The EBG conductor (120) is connected to a grounded part (160) through the variable reactance element (130). The adjusting part (150) changes the apparent reactance of the EBG conductor (120) by changing the capacity of the variable reactance element (130). As the apparent reactance of the EBG conductor (120) changes, the directivity of the miniature variable-beam microwave antenna (1) also changes.
Claims12
An antenna comprising:
- an antenna conductor;
- an electromagnetic-band-gap conductor which blocks off and reflects a radio wave emitted by the antenna conductor;
- a variable reactance element which connects the electromagnetic-band-gap conductor and a reference potential part together;
- and
- an adjust circuit which adjusts a reactance of the variable reactance element.
Dependencies are inferred from the claim text.