Antenna apparatus and a portable wireless communication apparatus using the same
AssigneeSony Corporation
InventorOsamu Kozakai
Life of this patent
Estimating the term…
Abstract
An antenna apparatus featuring a simple configuration and operability at a plurality of frequencies which are relatively proximate is provided. Phase shift circuits are connected respectively between feed points of a pair of antenna elements having different resonant frequencies and a radio circuit so as to shift phase of the radio waves and to increase an impedance of one of the antenna elements when the one of the antenna elements is used at the resonant frequency of the other one of the antenna elements.
Claims10
An antenna apparatus for receiving or transmitting radio waves at two different frequencies, comprising:
- a pair of antenna elements having different resonant frequencies, and
- a pair of phase shift circuits for shifting phase of said radio waves, wherein
- feed points of said pair of antenna elements are connected to a radio circuit via said pair of phase shift circuits, respectively.
An antenna apparatus for receiving or transmitting radio waves at a plurality of frequencies, comprising:
- a plurality of antenna elements having different resonant frequencies;
- and
- a plurality of phase shift circuits for shifting phase of said radio waves, wherein
- feed points of said plurality of antenna elements are connected to a radio circuit via said plurality of phase shift circuits, respectively.
A portable wireless communication apparatus having an antenna apparatus for receiving or transmitting radio waves at a plurality of frequencies, said antenna apparatus comprising:
- a plurality of antenna elements having different resonant frequencies;
- and
- a plurality of phase shift circuits for shifting phase of said radio waves, wherein
- feed points of said plurality of antenna elements are connected to a radio circuit via said plurality of phase shift circuits, respectively.
Dependencies are inferred from the claim text.