JP2009094713A - Module and mobile communication terminal using it - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To facilitate the design of a radio signal processing circuit for a mobile communication terminal, to reduce a mounting area and to reduce power consumption. <P>SOLUTION: The output device comprises: a switch for switching a signal route to either one of a transmission route of a first communication system connected to the antenna of the mobile communication terminal, a reception route of the first communication system and a transmission/reception route of a second communication system; a low-pass filter connected to the transmission terminal of the first communication system among the switching terminals of the switch; a first band-pass filter connected to the reception terminal of the first communication system among the switching terminals of the switch; a first low noise amplifier connected to the first band-pass filter for amplifying signals which pass through the band-pass filter; a duplexer connected to the transmission/reception terminal of the second communication system among the switching terminals of the switch; a second low noise amplifier for amplifying the output signals of the duplexer; and a second band-pass filter connected to the second low noise amplifier. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a transmission / reception device, and in particular, a module that facilitates mounting design in a radio signal processing circuit for a mobile communication terminal, reduces the mounting area, and thus contributes to low power consumption, and uses the same. The present invention relates to a mobile communication terminal.

  Conventionally, in the W-CDMA (Wideband-Code Division Multiple Access) system of 3GPP (3rd Generation Partnership Project) standard implemented as a mobile communication service network, six types of communication bands (bands from Band-I to Band-VI) ) And communication in a band suitable for the radio wave usage situation and plan in each country is possible. In this communication method, a transmission / reception duplex method by frequency division is adopted, and a transmission / reception circuit is selected by a duplexer configured by a filter corresponding to each frequency of transmission / reception.

  On the other hand, the pan-European digital mobile telephone system (GSM: Global System for Mobile Communications) is a communication system used in many countries, and is mainly operated in four frequency bands. In this method, a transmission / reception duplex method by time division is adopted, and transmission / reception is selected by an antenna switch that switches a route at each transmission / reception timing.

As such a switch for switching a plurality of bands, for example, Patent Document 1 discloses a module including a switch for switching a plurality of bands in a time division duplex system and a transmission / reception apparatus using the module. Patent Document 2 discloses a technology for modularizing a duplexer, a low-noise amplifier, and an interstage bandpass filter as a composite component for a portable terminal that supports a plurality of bands by a single unit, thereby reducing the mounting area and simplifying the design. It is disclosed.
JP 2006-140863 A JP 2006-166277 A

  However, when considering the correspondence to the multi-mode mobile communication terminal in which the frequency duplex method is added to the time division duplex method, the technology described in Patent Document 1 increases the number of parts almost twice, The wiring length between elements is also almost doubled. As described above, since the wiring is doubled and the redundancy is increased, the reception sensitivity is likely to be deteriorated due to noise mixed from the wiring from the duplexer to the low noise amplifier. There was a problem that it was difficult to cope with a fast product cycle.

  In addition, since a mobile phone terminal has a function corresponding to a plurality of communication methods by one unit, convenience in a scene such as international roaming is improved. The number is increasing. When the technique described in Patent Literature 2 is adopted in a dual mode compatible terminal, an antenna switch for selecting a communication method is required between the module and the antenna, and this switch is provided between the antenna and the low noise amplifier. Insertion in series causes a problem that reception sensitivity is deteriorated due to an increase in loss, and further transmission output is increased. In general, an impedance matching circuit is required between the bandpass filter and the low-noise amplifier, but Patent Document 2 does not have a detailed description of the impedance matching circuit.

  In view of the above problems, the present invention improves the reception performance by preventing loss due to the insertion of components for supporting a plurality of communication systems, and reduces the number of components to achieve downsizing and low power consumption. It is an object of the present invention to provide a mobile communication terminal capable of supporting a fast product cycle by simplifying the design by using the module.

  In order to solve the above problems, the module for a mobile communication terminal according to the present invention operates in both the first communication method based on the time division duplex method and the second communication method based on the frequency division duplex method, 1 or a transmission path of a first communication method used in a mobile communication terminal operating in two or more communication bands having different frequencies and connected to an antenna of the mobile communication terminal, a reception path of a first communication method, or A switch that switches a signal path to the antenna to any one of transmission / reception paths of the second communication method, and a signal to the antenna that is connected to a transmission terminal of the first communication method among the switching terminals of the switch A low-pass filter that passes only the desired band and a receiving terminal of the first communication method among the switching terminals of the switch, and passes only the desired band from the signal from the antenna. A first band-pass filter that is connected to the first band-pass filter, a first low-noise amplifier that is connected to the first band-pass filter, amplifies the signal that has passed through the band-pass filter, and outputs the amplified signal as a balanced signal; Of the switching terminals of the switch, connected to the transmission / reception terminal of the second communication system, connected to the duplexer that passes only a desired band from the antenna or from the signal to the antenna, and connected to the duplexer, the output signal of the duplexer By comprising a second low-noise amplifier that amplifies, and a second band-pass filter that is connected to the second low-noise amplifier and passes only a desired band from the output signal of the low-noise amplifier, The design of the signal processing circuit is simplified, the size is reduced, and the power consumption is reduced.

  Furthermore, by using the module, the design of the mobile communication terminal can be simplified to cope with a fast product cycle.

  Further, the module for a mobile communication terminal according to the present invention includes a transmission path of the first communication scheme, a reception path of the first communication scheme, or a signal path of a transmission / reception path of the second communication scheme. At least one signal path is provided with a plurality of paths corresponding to two or more communication bands, and the output signal of the low noise amplifier is output as a balanced signal, and the signal output is output from a common balanced output terminal. Thus, the reception performance of the mobile communication terminal is improved, the size is reduced, and the power consumption is reduced.

  According to the present invention, a module capable of preventing loss due to insertion of components for supporting a plurality of communication methods, improving reception performance, reducing the number of components, and reducing the size and power consumption. Furthermore, by using the module, it is possible to provide a mobile communication terminal that can simplify the design and cope with a fast product cycle.

  The best mode for carrying out the present invention will be described below with reference to the drawings.

FIG. 1 is a functional block diagram showing a configuration example of a module for a mobile communication terminal according to the present invention. A module (hereinafter also referred to as “this module”) 200 for a mobile communication terminal according to the present invention shown in FIG. 1 is a GSM standard GSM850 band, EGSM (Extended), which is a time division duplex system (first communication system). 4 bands of GSM) band, DCS (Digital Cellular System) band and PCS (Personal Communication System) band, and W-CDMA Band-I, Band-I of 3GPP standard frequency duplex system (second communication system) It is used for mobile communication terminals corresponding to II and Band-V 3 bands.
The module 200 includes an antenna 10, a switch 20, low pass filters 31, 32, band pass filters 41 to 44 (first band pass filters), duplexers 51 to 53, low noise amplifiers 61 to 64 (first low noise amplifiers). ), Low noise amplifiers 71 to 73 (second low noise amplifier), band pass filters 81 to 83 (second band pass filter), and impedance matching circuits 111 to 114, 121 to 123.

  In the above configuration, the switch 20 is connected to the antenna 10, and transmits / receives a radio signal transmitted / received by the antenna 10 to / from each band in the time division duplex system. Select.

  The low-pass filters 31 and 32 are respectively connected to the transmission terminals of the time division duplex method among the switching terminals of the switch 20. The low-pass filter 31 uses GSM850 band and EGSM band transmission bands as pass bands, and the low-pass filter 32 uses DCS band and PCS band transmission bands as pass bands.

  The bandpass filters 41, 42, 43, and 44 are connected to the time division duplex reception terminals among the switching terminals of the switch 20, and pass through the reception bands of the GSM850 band, the EGSM band, the DCS band, and the PCS band, respectively. Band.

  The low noise amplifiers 61, 62, 63, 64 are connected to the bandpass filters 41, 42, 43, 44 through impedance matching circuits 111, 112, 113, 114 for preventing attenuation of the received signals, respectively. The received signals in the GSM850 band, EGSM band, DCS band, and PCS band are amplified.

  The duplexers 51, 52, and 53 are respectively connected to the frequency division duplex transmission / reception terminals among the switching terminals of the switch 20. The duplexers 51, 52 and 53 are combinations of transmission band bandpass filters and reception band bandpass filters corresponding to Band-I, Band-II and Band-V in W-CDMA, respectively. This is to demultiplex.

  Low noise amplifiers 71, 72, 73 are connected to duplexers 51, 52, 53 via impedance matching circuits 121, 122, 123, and receive signals of Band-I, Band-II, and Band-V in W-CDMA, respectively. Is to amplify. The bandpass filters 81, 82, and 83 remove harmonics generated by the low noise amplifiers 71, 72, and 73, respectively. The low noise amplifiers 61 to 64 and 71 to 73 may be either fixed amplification factors or variable amplification factors.

  First, as an example of operation in the GSM standard which is a time division duplex method, an operation example of the module 200 when the GSM850 band is selected will be described below.

When communication using the GSM850 band is selected in the mobile communication terminal, the switch 20 of the module 200 shown in FIG. 1 is connected to the antenna 10 and the low-pass filter 31 only during transmission by the external control signal. Only the path connecting the band-pass filter 41 is controlled to conduct. At the time of transmission, a transmission signal output from a baseband IC 220 that processes transmission data is converted from a low frequency to a high frequency in an RFIC (Radio Frequency Integrated Circuit) 210 and then amplified by a power amplifier 91 and input to the module 200. Is done. The RFIC 210 includes a plurality of functional blocks that constitute a radio signal processing circuit. The harmonics generated by the RFIC 210 and the power amplifier 91 are suppressed as a signal other than the desired band by the low-pass filter 31, and the desired band wave passes through the filter 31 and the switch 20 and is output to the antenna 10.
At the time of reception, the received signal received by the antenna 10 passes through the switch 20, and the band-pass filter 41 suppresses signals other than the desired band, and the desired band wave passes through the band-pass filter 41 and is input to the low noise amplifier 61. And amplified and input to the RFIC 220. Next, in the RFIC 220, the received signal is converted from a high frequency to a low frequency and input to the baseband IC 220 that processes the received data.

  Next, as an example of the operation in each band of the 3GPP standard W-CDMA which is a frequency division duplex method, an operation example of the module 200 when Band-I is selected will be described below.

  Transmission and reception are performed simultaneously because of the frequency division duplex method. In the mobile communication terminal, when Band-I communication is selected, the switch 20 of the module 200 is controlled by an external control signal so that only the path connecting the antenna 10 and the duplexer 51 is conducted during transmission. Transmission data processed by the baseband IC 220 is converted into a high-frequency transmission signal by the RFIC 210 and amplified by the power amplifier 101. Among the amplified transmission signals, harmonics are suppressed by the transmission band-pass filter that constitutes the duplexer 51, and the desired wave passes through the filter and switch and is output to the antenna.

  A reception signal received by the antenna 10 passes through a reception band-pass filter that constitutes the switch 20 and the duplexer 51, is input to the low noise amplifier 71 via the impedance matching circuits 121, 122, 123, and is amplified before being amplified. For wave suppression, the signal passes through the band-pass filter 81, is input to the RFIC 210, is converted to a low frequency, and is input to the baseband IC 220 as reception data.

  For each of the other W-DCMA bands, the antenna 10 is connected to the corresponding duplexer by switching the switch 20, and the same operation is performed.

  In this module 200, the GSM standard communication system 4 band and the W-CDMA communication system 3 band are switched by one switch 20. When using a module for a transmitter / receiver having a configuration example supporting W-CDMA multiple bands in Patent Document 2, it is necessary to insert an antenna switch for switching between the GSM standard communication system between the module and the antenna. To increase. By using the module 200, the switch 20 can be stored in the module 200, so that an increase in insertion loss can be suppressed and reception performance can be improved.

  In addition, noise mixed in the signal path before being amplified by the low noise amplifier directly deteriorates the overall noise figure, and thus has a great influence on reception sensitivity deterioration of the mobile communication terminal. However, according to the configuration of this module 200, the duplexer Since the distances from 51, 52, 53 and the antenna switch 20 to the low noise amplifier can be shortened, the influence of noise is small. Further, impedance matching circuits 111, 112, 113, and 114 are arranged between the bandpass filters 41, 42, 43, and 44 and the low noise amplifiers 61, 62, 63, and 64 to perform impedance matching of the low noise amplifier input section. By commercializing in an optimized state, there is no need for impedance matching for the mobile communication terminal manufacturer who is the user of this module 200, which contributes to shortening the design period and cost of the communication terminal. Similarly, when impedance matching circuits 121, 122, and 123 are arranged between the output portions of the received signals of the duplexers 51, 52, and 53 and the low noise amplifiers 71, 72, and 73, the trouble of impedance matching is eliminated, and the communication terminal Contributes to shortening the design period and reducing costs.

  Note that the number of bands of the time division duplex system and the number of bands of the frequency division duplex system in the first embodiment do not limit the scope of the present invention, and may correspond to a plurality of bands or a single band.

  FIG. 2 is a functional block diagram showing a configuration example of a mobile communication terminal in which an RF circuit and a baseband circuit are integrated on one chip. Reference numeral 230 denotes an integrated circuit in which an RF circuit and a baseband circuit are integrated on one chip, that is, an integrated IC. As shown in FIG. 2, by using this module 200, it is not necessary to integrate a low noise amplifier in the RFIC 210 shown in FIG. 1, and a CMOS (Complementary Metal Oxide Semiconductor) process, which is difficult to reduce noise in the prior art. This makes it possible to manufacture RFICs. Further, if the RFIC manufacturing process is CMOS, it can be integrated on the same chip as the baseband IC that can be manufactured by the CMOS process conventionally. Thereby, it can contribute to size reduction and price reduction of a mobile communication terminal. The mobile communication terminal includes a display unit, an input unit, a control unit, a voice output unit, a power supply unit, and the like (not shown) in addition to the transmission / reception unit including the module 200 and the integrated IC 230 shown in FIG.

  The module for a mobile communication terminal according to the present invention is also used for a mobile communication terminal using a multiple communication technique, that is, a MIMO (Multiple Input Multiple Output) technique.

  FIG. 3 is a functional block diagram showing a configuration example of a module for a mobile communication terminal according to the present invention in MIMO communication. Supports uplink (2x2) and downlink (2x2) MIMO communications that use two paths for both transmission and reception in two communication systems, time division duplex and frequency division duplex. It is an example of a structure of the radio signal processing circuit of a mobile communication terminal. The antenna 10 and the antenna 11 are two independent antennas used for MIMO communication.

  A module 201 for a mobile communication terminal according to the present invention connected to an antenna 10 operates in two communication systems, a time division duplex system and a frequency division duplex system, and a switch 21 for switching antenna connection destinations, a time division A low-pass filter 30 that passes a duplex transmission band, a band-pass filter 40 that passes a reception band of the same system, an impedance matching circuit 110, a low noise amplifier 60 that amplifies the received signal of the same system, and frequency division duplex communication Suppresses unnecessary waves generated by the duplexer 50, the impedance matching circuit 120, the low-noise amplifier 70 that amplifies the received signal of the same system, and the low-noise amplifier 70 that combine two band-pass filters that respectively pass the transmission band and the reception band of the system. The band pass filter 80 is configured. The module 202 for the mobile communication terminal connected to the antenna 11 has the same configuration. The switches 21 and 22 are provided with switch control terminals 400 and 401 so that transmission / reception can be switched by a control unit (not shown) of the mobile communication terminal.

  In MIMO communication, it is desirable that there is little interference between a plurality of transmission / reception paths, and the antenna 10 and the antenna 11 should be installed as far as possible from each other, but the low noise amplifiers 60, 61, 70 are separated from the antennas 10, 11. When the signal lines up to 71 become redundant, noise mixed in the path increases, and good reception sensitivity cannot be obtained. Even in such a case, in the transmission / reception signal processing circuit using the module for the mobile communication terminal according to the present invention, the terminal printed circuit board wirings 301 and 302 with the RFIC 211 are made redundant by increasing the distance between the antennas. , 303, 304, 305, 306, 307, and 308 are downstream of the low noise amplifiers 60, 61, 70, and 71, and have little influence on the above-described total noise figure, so that reception sensitivity does not deteriorate.

  FIG. 4 is a functional block diagram showing another configuration example of a module for a mobile communication terminal according to the present invention in MIMO communication. In two communication systems, time division duplex and frequency division duplex, signals are multiplexed using one path for transmission and three paths for reception, and only downlink corresponds to 3x3 MIMO communication. It is an example of a structure of the radio signal processing circuit of a communication terminal. In a system in which the downlink multiplicity is larger than the uplink as in this configuration example, some of the modules for the mobile communication terminal according to the present invention to be used only receive received signals as in the modules 203 and 204. It becomes the structure of the module to switch. In this case, a duplexer placed on the frequency duplex path is not necessary, and the band-pass filters 51 and 52 are used, thereby reducing power consumption.

  FIG. 5 is a functional block diagram showing another configuration example of a module for a mobile communication terminal according to the present invention in MIMO communication. Radio signal of mobile communication terminal that supports single band only for time division duplex, multiplexes signals using one path for transmission and three paths for reception, and supports 3x3 MIMO communication only for downlink It is a structural example of a processing circuit. When used in a single band of a single communication system, the module 205 includes a switch 25 for switching between transmission and reception, but the modules 206 and 207 do not require the switch 25 and the switch control terminal 400. This avoids complication of signal lines and contributes to reduction of circuit mounting area.

  FIG. 6 is a diagram showing a configuration example of a mobile communication terminal according to the present invention in MIMO communication. It is a structural example of the mobile communication terminal corresponding to MIMO communication using the module for mobile communication terminals according to the present invention. The mobile communication terminal 500 includes a control unit 400, antennas 10, 11, and 12, modules 201, 202, and 207 for mobile communication terminals according to the present invention, power amplifiers 90, 91, 100, and 101, an RFIC 214, a baseband IC 221, and And a display unit, an input unit, an audio output unit, a power supply unit, and the like (not shown). ing. When performing MIMO communication, the control unit 400 controls the operations of the plurality of modules 201 and 202 as shown in FIG. When the module 207 is the single communication system and single band receiving module 207 shown in FIG. 5, the wiring for controlling the switch of the module 207 is unnecessary, avoiding the complexity of the signal line, and the circuit mounting area. Can contribute to the reduction.

  FIG. 7 is a functional block diagram showing a configuration example of a module for a mobile communication terminal according to the present invention when the interstage reception filter is not used. The configuration example of the module 208 when used in a wireless signal processing circuit that does not require an interstage reception filter in the W-CDMA communication system is shown. Some RFICs used in the wireless signal processing circuit do not require the band-pass filters 81, 82, and 83, which are interstage reception filters after the low noise amplifiers 71, 72, and 73 as shown in FIG. When connecting to such an RFIC 215, the module 205 for mobile communication terminals of the present invention does not include the bandpass filters 81, 82, 83, and receives received signals using balanced output low noise amplifiers 76, 77, 78. Is output.

  With such a configuration, it is not necessary to install an unbalanced / balanced converter between the module 205 and the RFIC 215, and the number of parts is reduced. In addition, by designing a balanced line up to the module output in accordance with the performance of the low noise amplifier, it is possible to increase the balance of the module output signal and contribute to the improvement of the reception performance of the mobile communication terminal.

  FIG. 8 is a functional block diagram showing a configuration example of a module for a mobile communication terminal according to the present invention when the common mixer input RFIC is used. In the connection between the balanced output of the low noise amplifiers 61, 62, 63, 64 and the duplexers 81, 82, 83 of this module 209 and the RFIC 216, the parallel outputs of a plurality of bands with different frequencies of the same communication method are combined into one local The input is input to the RFIC 216 using a common mixer. By doing so, one mixer can be used in a plurality of bands having different frequencies of the same communication method, and the reception terminal of the RFIC 216 can be made common to each band. When the output of the module 209 is connected to the RFIC 216 in this way, the number of wirings on the motherboard of the terminal can be reduced by sharing the reception signal output terminal in the module 206 for the mobile communication terminal. This can contribute to improvement in mounting density and reduction in signal interference between lines.

It is a functional block diagram which shows the structural example of the module for mobile communication terminals which becomes this invention. It is a functional block diagram showing a configuration example of a mobile communication terminal according to the present invention in which an RF circuit and a baseband circuit are integrated on one chip. It is a functional block diagram which shows the structural example of the module for mobile communication terminals which becomes this invention in MIMO communication. It is a functional block diagram which shows the other structural example of the module for mobile communication terminals which becomes this invention in MIMO communication. It is a functional block diagram which shows the other structural example of the module for mobile communication terminals which becomes this invention in MIMO communication. It is a figure which shows the structural example of the mobile communication terminal which becomes this invention in MIMO communication. It is a functional block diagram which shows the structural example of the module for mobile communication terminals which becomes this invention when the interstage receiving filter is not used. It is a functional block diagram which shows the structural example of the module for mobile communication terminals which becomes this invention at the time of common mixer input RFIC use.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 ... Antenna 20, 21, 22, 23, 24, 25 ... Switch 30, 31, 32 ... Low pass filter 40, 41, 42, 43, 44 ... Band pass filter (1st)
50, 51, 52, 53 ... Duplexer 60, 61, 62, 63, 64 ... Low noise amplifier (first)
70, 71, 72, 73, 76, 77, 78 ... Low noise amplifier (second)
81, 82, 83 ... band pass filter (second)
90, 91, 92 ... power amplifier 100, 101, 102, 103 ... power amplifier 110, 111, 112, 113, 114 ... impedance matching circuit 120, 121, 122, 123 ... impedance matching circuit 200, 201, 202, 203, 204, 205, 206, 207 ... Modules 210, 211, 212, 213, 214, 215, 216 ... RFIC for mobile communication terminals
220, 221 ... Baseband IC
230 ... RF and baseband integrated IC
400: Control unit 500: Mobile communication terminal.

Claims (11)

Used in mobile communication terminals that operate in both the first communication system based on the time division duplex system and the second communication system based on the frequency division duplex system, each operating in one or two or more communication bands having different frequencies. ,
Signal to the antenna to any one of the transmission path of the first communication system, the reception path of the first communication system, or the transmission / reception path of the second communication system connected to the antenna of the mobile communication terminal A switch for switching the route,
A low-pass filter that is connected to the transmission terminal of the first communication method among the switching terminals of the switch and passes only a desired band from a signal to the antenna;
A first band-pass filter that is connected to a receiving terminal of a first communication method among the switching terminals of the switch, and that passes only a desired band from a signal from the antenna;
A first low noise amplifier connected to the first bandpass filter for amplifying a signal that has passed through the bandpass filter;
A duplexer that is connected to a transmission / reception terminal of a second communication method among the switching terminals of the switch, and that passes only a desired band from the antenna or a signal to the antenna;
A second low noise amplifier connected to the duplexer for amplifying the output signal of the duplexer;
A second band-pass filter connected to the second low-noise amplifier and passing only a desired band from an output signal of the low-noise amplifier;
A module for a mobile communication terminal characterized by comprising: Between the first bandpass filter and the first low noise amplifier;
The module for mobile communication terminals according to claim 1, further comprising an impedance matching circuit in at least one of the duplexer and the second low-noise amplifier. The module for a mobile communication terminal according to claim 1 or 2, further comprising a low-noise amplifier that outputs a balanced signal as the second low-noise amplifier, without the second band-pass filter. . At least one signal path corresponds to two or more communication bands among the transmission path of the first communication system, the reception path of the first communication system, or the signal path of the transmission / reception path of the second communication system. The module for mobile communication terminals according to claim 1, comprising a plurality of routes. When the first low noise amplifier that outputs a balanced signal to the plurality of paths is provided, the signal output of the balanced signal of the low noise amplifier is output from a common balanced output terminal. 4. The module for mobile communication terminals according to 4. The signal output of the balanced signal is output from a common balanced output terminal when the second low noise amplifier that outputs a balanced signal to the plurality of paths is provided. A module for the mobile communication terminal described. The module for a mobile communication terminal according to any one of claims 1 to 6, wherein the signal path of the first communication method is configured only by a transmission path or a reception path. The signal path of the second communication method is composed only of a transmission path or a reception path,
The module for mobile communication terminals according to any one of claims 1 to 8, further comprising a band-pass filter that allows a desired transmission band or reception band to pass in place of the duplexer. A mobile communication terminal that operates in both a first communication system based on a time division duplex system and a second communication system based on a frequency division duplex system, each operating in one or two or more communication bands having different frequencies. ,
Signal to the antenna to any one of the transmission path of the first communication system, the reception path of the first communication system, or the transmission / reception path of the second communication system connected to the antenna of the mobile communication terminal A switch for switching the route,
A low-pass filter that is connected to the transmission terminal of the first communication method among the switching terminals of the switch and passes only a desired band from a signal to the antenna;
A first band-pass filter that is connected to a receiving terminal of a first communication method among the switching terminals of the switch, and that passes only a desired band from a signal from the antenna;
A first low-noise amplifier connected to the first band-pass filter, amplifying the signal passing through the band-pass filter, and outputting the amplified signal as a balanced signal;
A duplexer that is connected to a transmission / reception terminal of a second communication method among the switching terminals of the switch, and that passes only a desired band from the antenna or a signal to the antenna;
A second low noise amplifier connected to the duplexer for amplifying the output signal of the duplexer;
A second band-pass filter connected to the second low-noise amplifier and passing only a desired band from an output signal of the low-noise amplifier;
A mobile communication terminal comprising a module for a mobile communication terminal comprising: The mobile communication terminal according to claim 9, wherein the module is a module for the mobile communication terminal according to any one of claims 2 to 8. The mobile communication terminal according to claim 9 or 10, comprising an integrated circuit in which a circuit for processing a radio signal and a circuit for processing a baseband signal are integrated on a single chip.

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