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Wireless communications device
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一种无线通信、天线的技术，应用在无线通信机领域，能够解决功率效率降低、高频放大器111困难等问题
Inactive Publication Date: 2006-11-22
PANASONIC CORP
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Problems solved by technology
When setting the optimum size of the high-frequency amplifier 111 in consideration of the attenuation of the transmission signal in the duplexer 133, there is a problem that the power efficiency is lowered in the digital mode without the attenuation of the transmission signal by the duplexer 133.
[0016] Furthermore, in the digital mode in which the transmission signal includes an amplitude modulation component, since the linearity of the high-frequency amplifier 111 is important in terms of the characteristics of the modulation method, it is necessary to place the high-frequency amplifier 111 at a position slightly below the saturation power point. Area action, there is a problem of further reduction in power efficiency
[0017] In addition, not only when the analog mode and the digital mode are mixed, but also between the digital modes, there is a problem that the required transmission power and the like are different, and it is difficult to operate the high-frequency amplifier 111 with the maximum efficiency in all the modes. very difficult
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no. 1 approach
[0048] A radio communication device according to a first embodiment of the present invention will be described with reference to the drawings. figure 1 The block configuration of the wireless communication device according to the first embodiment is shown.
[0049] Such as figure 1 As shown, the wireless communication device of this embodiment is a dual-mode wireless communication device corresponding to two different communication methods. Although the two communication formats can be arbitrary, for the convenience of explanation, the case corresponding to the GSM mode which is a kind of TDMA method and the UMTS mode which is a kind of CDMA method will be described.
[0050] The wireless communication device of this embodiment includes: a frequency generator 11 that generates an oscillation signal of a predetermined frequency; a modulation unit 12 that modulates the oscillation signal generated by the frequency generator 11; A preamplifier 13 for amplifying the frequency ...
no. 2 approach
[0063] Hereinafter, a radio communication device according to a second embodiment of the present invention will be described with reference to the drawings. figure 2 The block configuration of the wireless communication device according to the second embodiment is shown. exist figure 2 , by pairing with figure 1 The same configurations are assigned the same symbols and descriptions thereof are omitted.
[0064] In the wireless communication device of the present embodiment, the output terminal of the GSM signal path 20 and the output terminal of the UMTS signal path 30 are connected to the input / output terminals of the antenna selector switch 41 , respectively. The common antenna 42 is connected to the antenna terminal of the antenna selector switch 41, and one antenna is switched between the GSM mode and the UMTS mode.
[0065]The antenna selector switch 41 is controlled by the controller 15 similarly to the path selection switch 14 , and is configured so that the signa...
no. 3 approach
[0068] Hereinafter, a radio communication device according to a third embodiment of the present invention will be described with reference to the drawings. image 3 The block configuration is shown for a part of the wireless communication device according to the third embodiment. exist image 3 , by pairing with figure 1 The same configurations are assigned the same symbols and descriptions thereof are omitted.
[0069] In the wireless communication device of this embodiment, instead of the path selection switch 14, the GSM signal path and the UMTS signal path are switched by two resonant lines.
[0070] The output line from the common preamplifier 13 used in the GSM mode and the UMTS mode is divided into two at the branch point 51, and one side of the branch is inserted into the first resonant line 52 and connected to the input of the GSM power amplifier 21 provided on the GSM signal path 20. terminal connection. The other branch is inserted into the second resonant line...
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Abstract
A wireless communication machine includes: a modulation unit (12), which modulates a signal generated by a frequency generator (11), to generate a high-frequency signal in a GSM mode and a high-frequency signal in a UMTS mode; a GSM signal path (20), corresponding to A power amplifier (21) for GSM is provided for the high-frequency signal generated in the modulation unit; a path selection switch (14) is provided for switching the UMTS signal path (30) provided with the power amplifier (31) for UMTS. The power amplifier for GSM exhibits the maximum power efficiency at the transmission power required by the GSM mode. The power amplifier for UMTS is set to have the maximum power efficiency at the transmission power required in the UMTS mode. Therefore, it is possible to realize a wireless communication device in which two or more communication methods with different operating characteristics and transmission power of the required amplifier can be realized, and the amplifier can operate under the condition of maximum power efficiency regardless of the communication method. .
Description
technical field [0001] The present invention relates to a wireless communication device that can be commonly used by different communication methods. Background technique [0002] In recent years, in mobile communications typified by mobile phones, various communication methods are used. For example, in Japan, a Personal Digital Cellular (PDC) system and a Code Division Multiple Access (CDMA) system using Time Division Multiple Access (TDMA) are mainly used. On the other hand, in foreign countries, the GSM (Global System for Mobile Communications) system using TDMA or the UMTS (Universal Mobile Telecommunications System) system using CDMA is used. Various techniques have been proposed in order to take into account such mixed and different communication methods. [0003] In the past, in a dual-mode communicator or transmitter that can be used in common for two different communication methods, generally when one of the communication methods is selected, the other communicati...
Claims
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Application Information
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