Composite antenna
AssigneeToshiba Tec Kabushiki Kaisha
InventorsNobuo Murofushi, Kouichi Sano, Yasuhito Kiji, Yasuo Matsumoto
Life of this patent
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Abstract
A composite antenna includes a first antenna structure and a second antenna structure integrally combined with the first antenna structure to operate under different frequency bands respectively that are used in different radio transmission systems such that the first antenna structure has a first conductive layer to operate under a first frequency band and the second antenna structure has a second conductive layer a thickness of which is thicker than that of the first conductive layer to operate under a second frequency band lower than the first frequency band.
Claims19
A composite antenna comprising:
- a first conductive layer having a first thickness;
- a first antenna structure, including the first conductive layer, which is operable under a first frequency band;
- a second conductive layer having a second thickness is thicker than the first thickness of the first conductive layer;
- and
- a second antenna structure, including the second conductive layer, which is operable under a second frequency band lower than the first frequency band, the second antenna structure being integrally provided with the first antenna structure, thereby causing electromagnetic waves having frequencies within the second frequency band to travel through the first antenna structure to the second antenna structure,
- the first thickness being smaller than the skin-depth of a current having a frequency within the second frequency band.
A composite antenna comprising:
- a first conductive layer having a first thickness;
- first means including the first conductive layer for conducting a transmission/reception operation under a first frequency band;
- a second conductive layer having a second thickness thicker than the first thickness of the first conductive layer;
- and
- second means including the second conductive layer for conducting a transmission/reception operation under a second frequency band lower than the first frequency band, the first means and the second means being integrally combined with one another, thereby causing electromagnetic waves having frequencies within the second frequency band to travel through the first means to the second means,
- the first thickness of the first conductive layer being smaller than the skin-depth of a current having a frequency within the second frequency band.
A composite antenna comprising:
- a first antenna structure, configured to operate within a first frequency band, the first antenna structure including a first substrate a radiant conductor on one surface of the first substrate, and an earth conductor on another surface of the first substrate, each thickness of the radiant conductor and the earth conductor being smaller than a skin-depth of a current having a frequency within a second frequency band lower than the first frequency band;
- and
- a second antenna structure integrated with the first antenna structure, the second antenna structure configured to operate within the second frequency band, the second antenna structure including a second substrate and a coiled conductor, the thickness of the coiled conductor being thicker than the skin-depth of a current having a frequency within the second frequency band.
Dependencies are inferred from the claim text.