WIRELESS UNIT ANTENNA APPARATUS AND MOBILE WIRELESS UNIT
First Claim
1. An antenna apparatus for a wireless unit, which transmits and receives an electromagnetic wave in each of frequency bands, and comprises:
- a ground plate;
a first antenna element for transmitting and receiving an electromagnetic wave in a first frequency band;
a first feeder provided on said ground plate and feeding said first antenna element;
a second antenna element for transmitting and receiving an electromagnetic wave in a second frequency band; and
a second feeder provided separately from said first feeder on said ground plate and feeding said second antenna element, whereinsaid first antenna element is designed to extend from said first feeder to the outside of said ground plate,said second antenna element is designed to extend from said second feeder,the total of an electrical length of said first antenna element, an electrical length of said second antenna element, and an electrical length between said first and second feeders is larger than a half wavelength of said first frequency band and equal to or smaller than one wavelength of said first frequency band.
2 Assignments
0 Petitions
Accused Products
Abstract
The present invention provides an antenna apparatus for a wireless unit, the antenna apparatus exhibiting a reduced specific absorption rate (SAR) without an additional component for reducing the SAR, which is the amount of energy of an electromagnetic wave absorbed by a human body. The antenna apparatus comprises a board 114 serving as a ground plate of an antenna, a first antenna element 102 transmitting and receiving an electromagnetic wave in a first frequency band and provided on the board 114 through the first feeder 107, and a second antenna element 110 transmitting and receiving an electromagnetic wave in a second frequency band and provided on the board 114 through the first feeder 111, wherein the total of an electrical length between the first and second feeders 107 and 111, an electrical length of the first antenna element 102, and an electrical length of the second antenna element 110 is larger than a half wavelength of the first frequency band and equal to or smaller than one wavelength of the first frequency band.
43 Citations
11 Claims
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1. An antenna apparatus for a wireless unit, which transmits and receives an electromagnetic wave in each of frequency bands, and comprises:
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a ground plate; a first antenna element for transmitting and receiving an electromagnetic wave in a first frequency band; a first feeder provided on said ground plate and feeding said first antenna element; a second antenna element for transmitting and receiving an electromagnetic wave in a second frequency band; and a second feeder provided separately from said first feeder on said ground plate and feeding said second antenna element, wherein said first antenna element is designed to extend from said first feeder to the outside of said ground plate, said second antenna element is designed to extend from said second feeder, the total of an electrical length of said first antenna element, an electrical length of said second antenna element, and an electrical length between said first and second feeders is larger than a half wavelength of said first frequency band and equal to or smaller than one wavelength of said first frequency band. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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Specification