Antenna device with a first and second antenna
First Claim
1. An antenna device comprising:
- a first antenna which is matched with first, second, and third frequency bands;
a second antenna which is matched with the third frequency band;
a diplexer which distributes signals received from the first antenna into signals of the first frequency band and signals of the second and third frequency band;
a first switch unit which selects a first transmitter for transmitting signals of the first frequency band or a first receiver for receiving signals of the first frequency band, and connects the selected one to the diplexer;
a second switch unit which selects a second receiver for receiving signals of the second frequency band or a second transmitter for transmitting signals of the second frequency band, and connects the selected one to the diplexer; and
a third switch unit which selects the second antenna or diplexer, and connects the selected one to a transmitter/receiver for transmitting and receiving signals of the third frequency band.
1 Assignment
0 Petitions
Accused Products
Abstract
An antenna device corresponds to a plurality of radio communications systems and frequency bands, can simultaneously carry out a reception and a transmission of different radio communications systems, and is capable of using antenna diversity by a simple construction. An antenna device comprises a first antenna matching with first, second, and third frequency bands, a second antenna matching with the third frequency band, a diplexer and the like. For signals of the first frequency band, a high-frequency switch circuit connects a transmitter or a receiver to the diplexer by switching. For signals of the second frequency band, an additional high-frequency switch connects a receiver or a transmitter to the diplexer by switching. For signals of the third frequency band, the additional high-frequency switch circuit and a further additional high-frequency switch circuit connect the second antenna or diplexer to a transmitter/receiver by switching.
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Citations
10 Claims
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1. An antenna device comprising:
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a first antenna which is matched with first, second, and third frequency bands; a second antenna which is matched with the third frequency band; a diplexer which distributes signals received from the first antenna into signals of the first frequency band and signals of the second and third frequency band; a first switch unit which selects a first transmitter for transmitting signals of the first frequency band or a first receiver for receiving signals of the first frequency band, and connects the selected one to the diplexer; a second switch unit which selects a second receiver for receiving signals of the second frequency band or a second transmitter for transmitting signals of the second frequency band, and connects the selected one to the diplexer; and a third switch unit which selects the second antenna or diplexer, and connects the selected one to a transmitter/receiver for transmitting and receiving signals of the third frequency band. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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Specification