Radio communication device

• US 20050085196A1
• Filed: 10/14/2004
• Published: 04/21/2005
• Est. Priority Date: 10/15/2003
• Status: Active Grant

• Current Assignee: Sharp Kabushiki Kaisha (Hon Hai Precision Industry Co., Ltd.)
• Original Assignee: Sharp Kabushiki Kaisha (Hon Hai Precision Industry Co., Ltd.)
• Inventors: Amano, Yoshihisa
• Granted Patent: US 7,366,480 B2
• Time in Patent Office: Days
• US Class Current: 455/101
• CPC Class Codes: H04B 7/0805 with single receiver and antenna switching H04B7/0822 takes precedence
• CPC Class Codes: H04B 7/10 Polarisation diversity; Directional diversity
• CPC Class Codes: Y02D 30/70 in wireless communication networks

Abstract

In the radio communication device of the present invention, a first carrier transmission modulation wave outputted from a first signal generator 101 is amplified by a first power amplifier 103 and transmitted from a first antenna element 107 through a first duplexer 105. A second carrier transmission modulation wave outputted from a second signal generator 102 is amplified by a second power amplifier 104 and transmitted from a second antenna element 108 through a second duplexer 106. Then, transmission modulation waves with the first and second carriers are subjected to spatial power combining after being transmitted from the two antenna elements 107 and 108 that permit diversity reception. As a result, the radio communication device, which uses two or more carriers (carrier waves), can achieve highly efficient power amplification with a small-sized low-cost circuit means.

Claims

1. A radio communication device having M (M:

natural number being not smaller than two) antenna elements, M signal generators, M power amplifiers and M duplexers, adopting a frequency division duplex operation system and using a multi-carrier signal that uses M carriers of different center frequencies as a transmission modulation wave, wherein

a transmission modulation wave with an N-th (N=1, . . . , M) carrier outputted from the N-th signal generator is amplified by the N-th power amplifier and transmitted from the N-th antenna element through the N-th duplexer, whereby transmission modulation waves with a total of M carriers including the first through M-th carriers are outputted from the respective M antenna elements.

3. The radio communication device as claimed in claim 1, wherein

the M antenna elements have planes of polarization in directions mutually shifted roughly at 90 degrees.

5. The radio communication device as claimed in claim 1, wherein

diversity reception is carried out by the M antenna elements.

7. The radio communication device as claimed in claim 3, wherein

diversity reception is carried out by the M antenna elements.

2. A radio communication device having M (M:

natural number being not smaller than two) antenna elements, M signal generators, M power amplifiers and M transmission/reception changeover switch circuits, adopting a time-sharing duplex operation system and using a multi-carrier signal that uses M carriers of different center frequencies as a transmission modulation wave, wherein

a transmission modulation wave with an N-th (N=1, . . . , M) carrier outputted from the N-th signal generator is amplified by the N-th power amplifier and transmitted from the N-th antenna element through the N-th transmission/reception changeover switch circuit, whereby transmission modulation waves with a total of M carriers including the first through M-th carriers are outputted from the respective M antenna elements.

4. The radio communication device as claimed in claim 2, wherein

the M antenna elements have planes of polarization in directions mutually shifted roughly at 90 degrees.

6. The radio communication device as claimed in claim 2, wherein

diversity reception is carried out by the M antenna elements.

8. The radio communication device as claimed in claim 4, wherein

diversity reception is carried out by the M antenna elements.