JP2008124790A - Antenna switch module - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an antenna switch module which allows a plurality of antennas to be used while suppressing the increase of a mounting space. <P>SOLUTION: The antenna switch module is formed in a multilayer substrate having a plurality of insulating layers and a plurality of conductor layers alternately laminated, and includes a plurality of antenna terminals which are provided on a terminal surface of the multilayer substrate, and connected to respective antennas different in pass band, and a mixing/branching circuit connected to the plurality of antenna terminals. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to an antenna switch module that is used in, for example, a cellular phone and switches a plurality of transmission signals and reception signals having different frequency bands.

  As an antenna switch module, for example, as in an example described in Patent Document 1 below, a first demultiplexing circuit that is connected to an antenna terminal and demultiplexes at least a received signal into a low frequency band and a high frequency band, and A device is known that includes a plurality of switching circuits that are connected to a first demultiplexing circuit, switch a reception signal and a transmission signal, and demultiplex the reception signal into a finer frequency band.

  In the conventional antenna switch module described above, signals are transmitted and received in all of a plurality of frequency bands covering a wide band from a low frequency band to a high frequency band with a common antenna.

  However, it is difficult to transmit and receive all signals of a plurality of communication systems over a wide band as described above with a common antenna without any loss. To compensate for this loss, it is necessary to increase the signal output. there were. In the conventional antenna switch module, the signal received by the common antenna is demultiplexed into the low frequency side signal and the high frequency side signal by the first demultiplexing circuit. A wideband signal received by an antenna is merely demultiplexed by an electric circuit, and isolation between a low frequency signal and a high frequency signal may be insufficient.

  Thus, as a method for solving the above problems, it is conceivable to provide a plurality of antennas. However, when a plurality of antennas are provided, problems described below occur.

  For example, in a mobile phone, in order to inspect and evaluate the performance of a mobile phone, instead of receiving a signal from an antenna or transmitting a signal from an antenna, a reception signal is input from an RF connector provided on a mounting board, The transmission signal is output.

  For this reason, when a plurality of antennas are provided to solve the above problem, the number of RF connectors corresponding to the number of antennas provided is simply provided on the mounting substrate, so that the mounting space increases. There is a problem that.

JP 2000-165274 A

  Accordingly, an object of the present invention is to provide an antenna switch module that can solve the above-described problems of the prior art and can use a plurality of antennas while suppressing an increase in mounting space.

In order to achieve at least a part of the above object, a first antenna switch module of the present invention is an antenna switch module formed on a multilayer substrate in which a plurality of insulating layers and a plurality of conductor layers are alternately laminated. Because
A plurality of antenna terminals provided on the terminal surface of the multilayer substrate and connected to antennas having different passbands;
A mixing / demultiplexing circuit connected to the plurality of antenna terminals;
It is characterized by providing.

  According to the first antenna switch module having the above configuration, signals of all of a plurality of communication systems over a wide band are not transmitted and received by a common antenna as in the prior art, but each communication system among the plurality of antennas is used. Can be transmitted and received using an antenna having a passband corresponding to the frequency band of the transmitted and received signals. As a result, compared to the case where a common antenna is used as in the prior art, the loss in the antenna can be reduced, and thus the power can be reduced, and the signals of a plurality of frequency bands to be transmitted and received can be isolated. Can be improved.

In the first antenna switch module of the present invention,
It is preferable that a first connector terminal provided on the terminal surface and connected to the mixing / demultiplexing circuit is provided.

  According to the first antenna switch module having the above configuration, a plurality of antennas can be supported by connecting one predetermined connector, for example, an RF connector, to the first connector terminal. In addition, since a test signal in the same frequency band as the reception signal or transmission signal of the communication system to be used can be input or output from one connector, a plurality of antennas can be used while suppressing an increase in mounting space. An antenna switch module can be provided.

In the first antenna switch module of the present invention,
A second connector terminal provided on the terminal surface;
A transmission / reception switch circuit that is connected to the second connector terminal and switches a signal path between a transmission circuit and a reception circuit corresponding to each of a plurality of different communication systems and the second connector terminal;
It is preferable to further comprise.

  According to the first antenna switch module having the above-described configuration, the first connector terminal is connected to the first connector terminal and the second connector terminal by connecting a predetermined connector, for example, an RF connector, to the first connector terminal from the mixing / demultiplexing circuit. The reception signal output via the first connector terminal can be input to the switching circuit via the second connector terminal, and the transmission signal output from the switching circuit via the second connector terminal can be input to the first connector terminal. To the mixing / demultiplexing circuit.

The second antenna switch module of the present invention is an antenna switch module formed on a multilayer substrate in which a plurality of insulating layers and a plurality of conductor layers are alternately laminated,
A plurality of antenna terminals provided on the terminal surface of the multilayer substrate and connected to antennas having different passbands;
A first switching circuit connected to the plurality of antenna terminals;
It is characterized by providing.

  Even in the second antenna switch module having the above-described configuration, signals of all of a plurality of communication systems over a wide band are not transmitted and received by a common antenna as in the related art. Transmission and reception can be performed using an antenna having a pass band corresponding to the frequency band of signals to be transmitted and received. As a result, compared to the case where a common antenna is used as in the prior art, loss in the antenna can be reduced, and thus power can be reduced, and signals in a plurality of frequency bands to be transmitted and received are transmitted. It is possible to improve the isolation.

In the second antenna switch module of the present invention,
Preferably, a first connector terminal provided on the terminal surface and connected to the first switching circuit is provided.

  The second antenna switch module having the above configuration also supports a plurality of antennas by connecting one predetermined connector, for example, an RF connector, to the first connector terminal. Since a test signal in the same frequency band as the reception signal or transmission signal of the communication system to be used can be input or output from one connector, a plurality of antennas can be used while suppressing an increase in mounting space. An antenna switch module can be provided.

In the second antenna switch module of the present invention,
A second connector terminal provided on the terminal surface;
A transmission / reception switch circuit that is connected to the second connector terminal and switches a signal path between a transmission circuit and a reception circuit corresponding to each of a plurality of different communication systems and the second connector terminal;
It is preferable to further comprise.

  Also in the second antenna switch module having the above configuration, the first connector terminal is connected to the first connector terminal and the second connector terminal by connecting a predetermined connector, for example, an RF connector, from the first switching circuit. The reception signal output via the second connector terminal can be input to the second switching circuit, and the transmission signal output from the second switching circuit via the second connector terminal can be It can be input to the first switching circuit via the first connector terminal.

In the first or second antenna switch module of the present invention,
It is preferable that the first and second connector terminals are arranged adjacent to each other on the terminal surface or arranged with a ground terminal interposed therebetween.

  As described above, the first and second connector terminals are arranged adjacent to each other, which is convenient for component arrangement and wiring layout. In addition, since the connector terminals are arranged with the ground terminal interposed therebetween, signal leakage between the connector terminals can be suppressed, so that the performance of the antenna switch module can be improved.

In the first or second antenna switch module of the present invention,
It is preferable that the at least one antenna terminal and the at least one connector terminal are arranged adjacent to each other on the terminal surface or arranged with a ground terminal interposed therebetween.

  As described above, the antenna terminal and the connector terminal are arranged adjacent to each other, which is convenient for the arrangement of components connected to the antenna switch module and the layout of the wiring connecting the two.

In the first or second antenna switch module of the present invention,
The plurality of antenna terminals are arranged side by side on the terminal surface,
The antenna terminals are preferably arranged adjacent to each other or with a ground terminal interposed therebetween.

  Thus, a plurality of antenna terminals are arranged in order on the terminal surface, and the antenna terminals are arranged adjacent to each other, which is convenient for antenna arrangement and wiring layout for connecting the antenna and the antenna switch module. . In addition, since signal leakage from the antenna terminal to other terminals can be suppressed, the performance of the antenna switch module can be improved. Furthermore, since the antenna terminals are arranged with the ground terminal interposed therebetween, signal leakage between the antenna terminals can be suppressed, so that the performance of the antenna switch module can be improved.

In the first or second antenna switch module of the present invention,
The plurality of terminals include a plurality of reception signal output terminals,
The plurality of reception signal output terminals are arranged side by side on the terminal surface,
It is also preferable that the reception signal output terminals are arranged adjacent to each other or arranged with a ground terminal interposed therebetween.

  It is also preferable that all the reception signal output terminals are arranged adjacent to each other.

  In this way, a plurality of reception signal output terminals are arranged side by side on the terminal surface, and in particular, when the reception terminals are all arranged adjacent to each other, the arrangement of components connected to the antenna switch module and the connection between the two are connected. This is convenient for the layout of wiring. In addition, since leakage of signals from the reception signal output terminal to other terminals can be suppressed, the performance of the antenna switch module can be improved. In addition, since the reception signal output terminals are arranged with the ground terminal interposed therebetween, signal leakage between the reception signal output terminals can be suppressed, so that the performance of the antenna switch module can be improved.

In the first or second antenna switch module of the present invention,
The plurality of terminals include a plurality of reception signal output terminals,
When the reception signal output terminal and the connector terminal are arranged side by side, it is preferable that a ground terminal is arranged between the reception signal output terminal and the connector terminal.

  Since the reception signal output terminal and the connector terminal are arranged with the ground terminal sandwiched therebetween, signal leakage between the terminals can be suppressed, so that the performance of the antenna switch module can be improved.

In the first or second antenna switch module of the present invention,
The plurality of terminals include a plurality of reception signal output terminals,
When the reception signal output terminal and the antenna terminal are arranged side by side, it is preferable that a ground terminal is arranged between the reception signal output terminal and the antenna terminal.

  Since the reception signal output terminal and the antenna terminal are arranged with the ground terminal sandwiched therebetween, signal leakage between the terminals can be suppressed, so that the performance of the antenna switch module can be improved.

In the first or second antenna switch module of the present invention,
The plurality of terminals include a plurality of transmission signal input terminals,
The plurality of transmission signal input terminals are arranged side by side on the terminal surface,
The transmission signal input terminals are preferably arranged adjacent to each other or arranged with a ground terminal interposed therebetween.

  Arranging a plurality of transmission signal input terminals side by side on the terminal surface in this way is convenient for the arrangement of components connected to the antenna switch module and the layout of the wiring connecting the two. In addition, since leakage of signals from the transmission signal input terminal to other terminals can be suppressed, the performance of the antenna switch module can be improved. In addition, since the transmission signal input terminals are arranged with the ground terminal interposed therebetween, it is possible to suppress signal leakage between the transmission signal input terminals, so that the performance of the antenna switch module can be improved.

In the first or second antenna switch module of the present invention,
The plurality of terminals include a plurality of transmission signal input terminals,
When the transmission signal input terminal and the connector terminal are arranged side by side, a ground terminal is preferably arranged between the transmission signal input terminal and the connector terminal.

  Thus, when the connector terminal and the transmission signal input terminal are arranged side by side, by arranging the ground terminal between the connector terminal and the transmission signal input terminal, the connection between the connector terminal and the transmission input terminal is achieved. Since signal leakage can be suppressed, the performance of the antenna switch module can be improved.

In the first or second antenna switch module of the present invention,
The plurality of terminals include a plurality of transmission signal input terminals,
When the antenna terminal and the transmission signal input terminal are arranged side by side, it is also preferable that a ground terminal is arranged between the antenna terminal and the transmission signal input terminal.

  As described above, when the antenna terminal and the transmission signal input terminal are arranged side by side, by arranging the ground terminal between the antenna terminal and the transmission signal input terminal, the antenna terminal and the transmission input terminal are arranged. Since signal leakage can be suppressed, the performance of the antenna switch module can be improved.

In the first or second antenna switch module of the present invention,
The plurality of terminals include a plurality of transmission signal input terminals and a plurality of reception signal input terminals,
When the transmission signal input terminal and the reception signal output terminal are arranged side by side, it is also preferable that a ground terminal is arranged between the transmission signal input terminal and the reception signal output terminal.

  In this way, when the transmission signal input terminal and the reception signal output terminal are arranged side by side, the ground terminal is arranged between the transmission signal input terminal and the reception signal output terminal, thereby receiving from the transmission signal input terminal. Since signal leakage to the signal output terminal can be suppressed, the performance of the antenna switch module can be improved.

  The present invention is not limited to the above-described aspect of the antenna switch module, but can also be realized in the form of an antenna switch device.

Hereinafter, embodiments of the present invention will be described in the following order based on examples.
A. First embodiment:
B. Second embodiment:
C. Variation:

A. First embodiment:
FIG. 1 is a circuit diagram of an antenna switch module as a first embodiment of the present invention, and FIG. 2 is a perspective view showing an appearance of the antenna switch module of FIG.

  As shown in FIG. 1, the antenna switch module 100A of the present embodiment includes an antenna terminal ANT / Lo for a low frequency band, an antenna terminal ANT / Hi for a high frequency band, and a first RF connector connection terminal RFC1. The first mixing / demultiplexing circuit 102 connected, the second mixing / demultiplexing circuit 104 connected to the second RF connector connection terminal RFC2, and the second mixing / demultiplexing circuit 104 are connected to each other. Transmission / reception switch circuits 106, 108, a demultiplexing circuit 110 and a low-pass filter 112 connected to the transmission / reception switch circuit 106, respectively, and a demultiplexing circuit 114 and a low-pass filter 116 connected to the transmission / reception switch circuit 108, respectively. Yes. The antenna terminal ANT / Lo for low frequency band is connected to an antenna for low frequency band (not shown), and the antenna terminal ANT / Hi for high frequency band is connected to an antenna for high frequency band (not shown). The first RF connector connection terminal RFC1 is connected to one of two terminals (not shown) of the RF connector, and the second RF connector connection terminal RFC2 is connected to the other of the two terminals (not shown) of the RF connector. The first RF connector connection terminal RFC1 corresponds to the first connector terminal in the claims, and the second RF connector connection terminal RFC2 corresponds to the second connector terminal in the claims.

  As shown in FIG. 2, the antenna switch module 100A includes a multilayer body 94 composed of a multilayer substrate 92 composed of ceramic and conductor layers, which are insulating layers, and is made of metal on the multilayer substrate 92 (laminate body 94). A cap 98 is attached. Among the elements constituting each of the above circuits, some of the elements are mounted as chip components 96 on the surface layer (mounting surface), and the remaining elements are housed in the laminate 94 as conductor layers. The antenna terminal, transmission signal input terminal, reception signal output terminal, control terminal, and RF connector connection terminal are formed on the back layer (terminal surface) of the laminate (not shown).

This antenna switch module 100A is an antenna switch device mounted on a mobile phone, and corresponds to four communication systems of GSM850 and GSM900 divided into low frequency bands and DCS and PCS divided into high frequency bands. Yes. The frequency bands of the transmission signal and the reception signal of each communication system are as shown in Table 1.

  In FIG. 1, an antenna terminal ANT / Lo for a low frequency band inputs a received signal from an antenna (not shown) for a low frequency band and outputs a transmission signal to the antenna. The antenna terminal ANT / Hi for the high frequency band inputs a reception signal from an antenna (not shown) for the high frequency band and outputs a transmission signal to the antenna.

  The first mixing / demultiplexing circuit 102 includes a low-pass filter 102a that passes low frequency signals (GSM850 and GSM900 signals) and a high-pass filter 102b that passes high frequency signals (DCS and PCS signals). ing. When a low frequency signal (GSM850, GSM900 signal) is transmitted or received, the signal passes through the low-pass filter 102a, and the high-pass filter 102b side from the branch point 102c has good isolation with respect to the low-frequency signal. Therefore, the signal does not leak to the high pass filter 102b side. When a high frequency signal (DCS or PCS signal) is transmitted or received, the signal passes through the high-pass filter 102b, and the low-pass filter 102a side from the branch point 102c provides good isolation with respect to the high frequency. The signal does not leak to the low-pass filter 102a side. That is, the first mixing / demultiplexing circuit 102 has a function of demultiplexing a low-frequency signal and a high-frequency signal when transmitting a signal. On the other hand, when receiving the signal, the first mixing / demultiplexing circuit 102 mixes the low-frequency signal that has passed through the low-pass filter 102a and the high-frequency signal that has passed through the high-pass filter 102b at the branch point 102c. It has a function.

  In the RF connector, when a cable is connected to a connector terminal (not shown), the first RF connector connection terminal RFC1 and the second RF connector connection terminal RFC2 become non-conductive, and the cable is connected to the connector terminal. If not, the connector becomes conductive. In the normal operation state, the state is equivalent to the case where there is no RF connector.

  Similarly to the first mixing / demultiplexing circuit 102, the second mixing / demultiplexing circuit 104 includes a low-pass filter 104a that passes a low frequency signal (GSM850, GSM900 signal) and a high frequency signal (DCS, PCS). Signal) and a high-pass filter 104b. The second mixing / demultiplexing circuit 104 is also simply referred to as a diplexer (demultiplexing circuit). When a low frequency signal (GSM850, GSM900 signal) is transmitted or received, the signal passes through the low-pass filter 104a, and the high-pass filter 104b side from the branch point 104c has good isolation with respect to the low-frequency signal. Therefore, the signal does not leak to the high pass filter 102b side. When a high frequency signal (DCS or PCS signal) is transmitted or received, the signal passes through the high pass filter 104b, and good isolation is obtained for the high frequency from the branch point 104c to the low pass filter 104a. Therefore, the signal does not leak to the low-pass filter 104a side. That is, the second mixing / demultiplexing circuit 102 has a function of demultiplexing a low frequency signal and a high frequency signal when receiving a signal. On the other hand, when transmitting a signal, the first mixing / demultiplexing circuit 102 demultiplexes the low-frequency signal that has passed through the low-pass filter 102a and the high-frequency signal that has passed through the high-pass filter 102b at the branch point 102c. It has a function to do.

  The transmission / reception switch circuit 106 is a circuit for switching a signal path between the GSM850 reception signal and the GSM900 reception signal or the GSM850 transmission signal and the GSM900 transmission signal and RFC2. When a DC voltage is not applied to the control terminal VC1, the two diodes 106a and 106b in the transmission / reception switch circuit 106 are in an off state, so that the low-pass filter 112 is effectively opened. As a result, a low-frequency reception signal (GSM850, GSM900 reception signal) obtained from the antenna via the first mixing / demultiplexing circuit 102 and the second mixing / demultiplexing circuit 104 is separated by the transmission / reception switch circuit 106. To the wave circuit 110. When a DC voltage is applied to the control terminal VC1, the two diodes 106a and 106b in the transmission / reception switch circuit 106 are turned on, so that the branching circuit 110 is effectively opened. Accordingly, a low-frequency transmission signal (GSM850, GSM900 transmission signal) input from the transmission signal input terminal TX_1 / GSM850 / 900 via the low-pass filter 112 is transmitted by the transmission / reception switch circuit 106 to the first mixing / demultiplexing. The signal is sent to the antenna for the low frequency band through the circuit 102 and the second mixing / demultiplexing circuit 104. The low-pass filter 112 is a filter that allows signals in the frequency bands of GSM850 and GM900 to pass and blocks signals in the frequency bands higher than that.

  The transmission / reception switch circuit 108 is a switching circuit for switching a signal path between the DCS reception signal and the PCS reception signal or the DCS transmission signal and the PCS transmission signal and the RFC 2. When a DC voltage is not applied to the control terminal VC2, the two diodes 108a and 108b in the transmission / reception switch circuit 108 are in an off state, so that the low pass filter 116 is effectively opened. Thus, a high frequency reception signal (DCS and PCS reception signals) obtained from the antenna via the first mixing / demultiplexing circuit 102 and the second mixing / demultiplexing circuit 104 is demultiplexed by the transmission / reception switch circuit 108. Sent to circuit 114. When a DC voltage is applied to the control terminal VC2, the two diodes 108a and 108b in the transmission / reception switch circuit 108 are turned on, so that the branching circuit 114 is effectively opened. As a result, a high-frequency transmission signal (DCS and PCS transmission signals) input from the transmission signal input terminal TX_2 / DCS / PCS via the low-pass filter 116 is first mixed / demultiplexed by the transmission / reception switch circuit 108. The signal is sent to the antenna for the high frequency band via the circuit 102 and the second mixing / demultiplexing circuit 104. The low-pass filter 116 is a filter that allows signals in the DCS and PCS frequency bands to pass and blocks signals in the higher and lower frequency bands.

  The demultiplexing circuit 110 includes one matching circuit 110a and two SAW filters 110c and 110d. In the demultiplexing circuit 110, the signal line from the transmission / reception switch circuit 106 is connected to the matching circuit 110a, and the signal line from the matching circuit 110a is branched into two at the branch point 110b, and the SAW filters 110c and 110d are respectively provided. It is connected to the. One set of signal lines from the SAW filter 110c is connected to one set of reception signal output terminals RX_1 / GSM850, and one set of signal lines from the SAW filter 110d is connected to one set of reception signal output terminals RX_2 / GSM900. Yes.

  Therefore, as described above, in the transmission / reception switch circuit 106, when the DC voltage is not applied to the control terminal VC1, the first mixing / demultiplexing circuit 102 and the second mixing / demultiplexing are performed from the antenna for the low frequency band. When a low frequency reception signal (GSM850, GSM900 reception signal) obtained through the circuit 104 is sent to the branching circuit 110 by the transmission / reception switch circuit 106, the reception signal is branched after passing through the matching circuit 110a. The data is branched into two at point 110d and input to SAW filters 110c and 110d, respectively. The matching circuit 110a performs impedance matching on the received signals of GSM850 and GSM900 so that signal leakage is reduced.

  The SAW filter 110c is a filter that uses the frequency band of the GSM850 received signal as a passband, and allows only the GSM850 received signal among the GSM850 and GSM900 received signals to pass through and is output from the received signal output terminal RX_1 / GSM850. The SAW filter 110d is a filter whose pass band is the frequency band of the received signal of GSM900. Among the received signals of GSM850 and GSM900, only the received signal of GSM900 is passed and output from the received signal output terminal RX_2 / GSM900. Let

  Similarly, the branching circuit 114 includes one matching circuit 114a and two SAW filters 114c and 114d. In this branching circuit 114, the signal line from the transmission / reception switch circuit 108 is connected to the matching circuit 114a, and the signal line from the matching circuit 114a is branched into two at the branch point 110b, and connected to the SAW filters 114c and 114d, respectively. Has been. One set of signal lines from the SAW filter 114c is connected to one set of reception signal output terminals RX_3 / DCS, and one set of signal lines from the SAW filter 114d is connected to one set of reception signal output terminals RX_4 / PCS. Yes.

  Therefore, as described above, in the transmission / reception switch circuit 108, when no DC voltage is applied to the control terminal VC2, the first mixing / demultiplexing circuit 102 and the second mixing / demultiplexing circuit are connected to the high frequency band antenna. When a high-frequency reception signal (DCS or PCS reception signal) obtained through 104 is sent to the demultiplexing circuit 114 by the transmission / reception switch circuit 108, the reception signal passes through the matching circuit 114a, and then a branch point. Two branches at 114b and input to SAW filters 114c and 114d, respectively. The matching circuit 114a performs impedance matching on the DCS and PCS received signals so that signal leakage is reduced.

  The SAW filter 114c is a filter whose pass band is the frequency band of the DCS received signal, and passes only the DCS received signal among the DCS and PCS received signals, and outputs it from the received signal output terminal RX_3 / DCS. The SAW filter 114d is a filter whose pass band is the frequency band of the PCS received signal, and passes only the PCS received signal out of the DCS and PCS received signals, and is output from the received signal output terminal RX_4 / PCS. Let

  As the two diodes 106a and 106b of the transmission / reception switch circuit 106 and the two diodes 108a and 108b of the transmission / reception switch circuit 108, various diodes such as a PIN diode can be used.

  The antenna switch module 100A described above does not transmit and receive the signals of the four communication systems GSM850, GSM900, DCS, and PCS in the frequency band over a wide band as in the prior art, but on the low frequency band side. Signals of the communication systems GSM850 and GSM900 may be transmitted and received using the antenna for the low frequency band, and signals of the communication systems DCS and PCS on the high frequency band side may be transmitted and received using the antenna for the high frequency band. it can. As a result, it is possible to reduce the power loss by reducing the loss in the antenna, which has occurred when a single antenna is used as in the prior art, and the high frequency band side signal and the low frequency band side signal can be reduced. It is possible to improve isolation from the signal.

  The antenna switch module 100A uses the first mixing / demultiplexing circuit 102 to mix the signal received using the antenna for the low frequency band and the signal received using the antenna for the high frequency band. The second mixing / demultiplexing circuit 104 outputs from the first RF connector connection terminal RFC1 and again from the second RF connector connection terminal RFC2 via the RF connector connected to the first RF connector RFC1. The second mixing / demultiplexing circuit 104 can demultiplex the received signal into a high frequency received signal and a low frequency received signal.

  Further, the low-frequency transmission signal output from the transmission / reception switch circuit 106 and the high-frequency transmission signal output from the transmission / reception switch circuit 108 are mixed by the second mixing / demultiplexing circuit 104, and the second The signal is output once from the RF connector connection terminal RFC2, and then input again from the first RF connector connection terminal RFC1 to the first mixing / demultiplexing circuit 102 via the RF connector connected to the second RF connector RFC2. The first mixing / demultiplexing circuit 102 can demultiplex a high-frequency transmission signal and a low-frequency transmission signal.

  Therefore, since the antenna switch module 100A can be configured to use only one RF connector even though the antenna switch module 100A is configured to use two antennas, an increase in mounting space for the RF connector is suppressed. Meanwhile, an antenna switch module capable of using two antennas can be provided.

  The antenna switch module 100A has a low-pass filter 102a for low frequency signals (GSM800 and GSM900 signals) as compared to a conventional antenna switch module that does not have the first mixing / demultiplexing circuit 102. Since this configuration is added, it is advantageous in terms of noise reduction in low frequency signals.

  The antenna switch module 100A has been described by way of example using two antennas, but it is also possible to use three or more antennas. However, in this case, as the first mixing / demultiplexing circuit and the second mixing / demultiplexing circuit, signals of three or more different frequency bands are mixed into one signal, and the mixed signal is mixed with three or more. A mixing / demultiplexing circuit configured to demultiplex signals of different frequency bands is used.

  The antenna switch module 100A has been described by way of example of a case where a branching circuit is configured using two SAW filters. However, three or more antenna switch modules 100A may be received according to the number of communication systems.

  FIG. 3 is an explanatory view showing an example of terminal arrangement on the back layer (terminal surface) of the laminate 94 shown in FIG.

  In FIG. 3, terminals with terminal numbers (1) to (22) are arranged at the periphery of the terminal surface, and two large terminals with terminal numbers (23) and (24) are at the center of the terminal surface. Is arranged.

  Terminal numbers (1) to (8) are reception signal output terminals, and terminal numbers (1) and (2) are reception signal output terminals RX_1 / GSM850 (RX_1 (1) / GSM850, RX_1 (2) of a pair of GSM850. ) / GSM850), terminal numbers (3) and (4) are a pair of GSM900 reception signal output terminals RX_2 / GSM900 (RX_2 (1) / GSM900, RX_2 (2) / GSM900) and terminal numbers (5). , (6) is a reception signal output terminal RX_3 / DCS (RX_3 (1) / DCS, RX_3 (2) / DCS) of a pair of DCS, and terminal numbers (7) and (8) are reception of a pair of PCS. Assigned to the signal output terminal RX_4 / PCS (RX_4 (1) / PCS, RX_4 (2) / PCS). Terminal numbers (10) and (11) are antenna terminals, terminal number (10) is the antenna terminal ANT / Lo for the low frequency band, and terminal number (11) is the antenna terminal ANT / Hi for the high frequency band. Assigned. Terminal numbers (12) and (13) are RF connector connection terminals, terminal number (12) is assigned to the first RF connector connection terminal RFC1, and terminal number (13) is assigned to the second RF connector connection terminal. Yes. Terminal numbers (15) and (17) are transmission signal input terminals, and terminal number (15) is connected to a transmission signal input terminal TX_2 / DCS / PCS of high frequency band side signals (DCS and PCS signals). The number (17) is assigned to the transmission signal input terminal TX_1 / GSM850 / GSM900 of the low frequency band side signal (GSM850, GSM900 signal). Terminal numbers (18) and (19) are control terminals, terminal number (18) is the control terminal VC1 of the transmission / reception switch circuit 106 for the low frequency band, and terminal number (19) is the transmission / reception switch circuit for the high frequency band. 108 is assigned to the control terminal VC2. Terminal numbers (9), (14), (16), (20) to (24) are assigned to ground (GND) terminals. In the following description, when there is no need to distinguish between signal terminals, the RF connector connection terminal is represented as “RF connector connection terminal RFC”, the reception signal output terminal is represented as “reception signal output terminal RX”, and transmission is performed. The signal input terminal is represented as “transmission signal input terminal TX”, the antenna terminal is represented as “antenna terminal ANT”, and the control terminal is represented as “control terminal VC”.

  Here, the above-described terminal arrangement has the characteristics described below, and the effects described below are provided by these characteristics.

  The two RF connector connection terminals RFC having terminal numbers (12) and (13) are arranged adjacent to each other. The “adjacent arrangement” includes an arrangement adjacent to each other with the corner portion of the terminal surface interposed therebetween. Since the two RF connector connection terminals RFC are both terminals connected to the RF connector, if they are arranged adjacent to each other as in the embodiment, it is convenient for mounting the RF connector and wiring layout. The two RF connector connection terminals RFC may be arranged with a ground terminal interposed therebetween. In this way, signal leakage between the two terminals can be suppressed. The number of GND terminals arranged between the two RF connector connection terminals RFC is not limited to one, and two or more GND terminals are arranged between the two RF connector connection terminals RFC. May be. That is, the two RF connector connection terminals RFC may be arranged adjacent to each other or arranged with one or more GND terminals interposed therebetween.

  The two antenna terminals ANT having the terminal numbers (10) and (11) are arranged adjacent to each other. In general, the two antennas are preferably mounted and arranged in the same direction with respect to the antenna switch module from the viewpoints of space saving, mounting, and wiring layout. Therefore, if the two antenna terminals ANT are arranged adjacent to each other as in the embodiment, it is convenient for antenna arrangement and wiring layout. The two antenna terminals ANT may be arranged adjacent to each other with the GND terminal interposed therebetween. In this case, the isolation effect between the antenna terminals ANT can be further enhanced, and the signal between the antenna terminals ANT can be increased. The influence of leakage can be suppressed. Note that the number of GND terminals arranged between the antenna terminals ANT is not limited to one, and two or more GND terminals may be arranged between the antenna terminals ANT. That is, the antenna terminals ANT may be arranged adjacent to each other or arranged with one or more GND terminals interposed therebetween.

  The antenna terminal ANT having the terminal number (11) and the connector connection terminal RFC having the terminal number (12) are disposed adjacent to each other. Since the antenna terminal ANT / Hi of the terminal number (11) and the RF connector RFC1 of the terminal number (11) are terminals connected to the first mixing / demultiplexing circuit 102, as in the embodiment, the antenna terminal ANT If the RF connector connection terminals RFC are arranged adjacent to each other, it is convenient in terms of layout. The antenna terminal ANT and the RF connector connection terminal RFC may be disposed adjacent to each other across the GND terminal. In this case, the isolation effect between the antenna terminal ANT and the RF connector connection terminal RFC is provided. And the influence of signal leakage between the antenna terminal ANT and the RF connector connection terminal RFC can be suppressed. Further, the number of GND terminals arranged between the antenna terminal ANT and the RF connector connection terminal RFC is not limited to one, and two or more GND terminals are connected between the antenna terminal ANT and the RF connector connection terminal RFC. It may be arranged between them. That is, the antenna terminal ANT and the RF connector connection terminal RFC may be arranged adjacent to each other or arranged with one or more GND terminals interposed therebetween.

  All the reception signal output terminals RX of the terminal numbers (1) to (8) are arranged adjacent to each other. In general, the components constituting the receiving circuit to which the reception signal output terminal RX is connected are preferably mounted and arranged in the same direction with respect to the antenna switch module in terms of space saving, mounting, and wiring layout. Therefore, as in the embodiment, if all of the reception signal output terminals RX are arranged adjacent to each other, it is convenient for the arrangement of components connected to the antenna switch module and the layout of the wiring connecting the two.

  Also, if different types of terminals such as transmission signal input terminal, antenna terminal, control terminal, etc. are placed adjacent to the reception signal output terminal RX, signal leakage may occur between signals transmitted through the terminals, which may have adverse effects. There is sex. However, as in the embodiment, if all the reception signal output terminals RX are arranged adjacent to each other, different types of signal leakage may occur and affect the reception signal, or the reception signal may be of a different type. It is possible to suppress the influence on the signal.

  Note that signal leakage between the reception signal output terminals RX can be removed by a filter provided for each signal, and its influence is relatively small. Therefore, basically, there is a gap between the reception signal output terminals RX. The necessity to arrange the GND terminal is low. However, since signal leakage does not occur, a GND terminal may be disposed between the reception signal output terminals RX to suppress signal leakage between the reception signal output terminals RX. Note that the number of GND terminals arranged between the reception signal output terminals RX is not limited to one, and two or more GND terminals may be arranged between the reception signal output terminals RX.

  As described above, the reception signal output terminals RX may be arranged adjacent to each other or arranged with one or more GND terminals interposed therebetween.

  Further, the reception signal output terminals RX arranged side by side, such as the reception signal output terminals RX of the terminal numbers (1) and (8) arranged at the ends, of the terminal numbers (20) and (9). If the GND terminals are arranged adjacent to each other, signal leakage from different types of terminals to the reception signal output terminal RX can be suppressed, or signal leakage from the reception signal output terminal RX to different types of terminals can be suppressed. It becomes.

  In particular, since the GND terminal having the terminal number (9) is disposed between the reception signal output terminal RX having the terminal number (8) and the antenna terminal ANT having the terminal number (10), the antenna terminal ANT and the reception signal output are provided. Signal leakage with the terminal RX can be suppressed. The number of GND terminals arranged between the antenna terminal ANT and the reception signal output terminal RX is not limited to one, and two or more GND terminals are connected between the antenna terminal ANT and the reception signal output terminal RX. It may be arranged between them. That is, the antenna terminal ANT and the reception signal output terminal RX may be arranged with one or more GND terminals interposed therebetween.

  The two transmission signal input terminals TX with terminal numbers (15) and (17) are arranged adjacent to each other with the GND terminal with terminal number (16) in between. In general, the components constituting the transmission circuit to which the transmission signal input terminal TX is connected are preferably mounted and arranged in the same direction with respect to the antenna switch module in terms of space saving, mounting, and wiring layout. Therefore, it is more convenient for the arrangement of the components connected to the antenna switch module and the layout of the wiring connecting the two to be arranged so that all the transmission signal input terminals TX are adjacent to each other as in the embodiment. Further, if one or more GND terminals are arranged between the two transmission signal input terminals TX, signal leakage between the transmission signal input terminals TX can be suppressed. That is, the transmission signal input terminals TX may be arranged adjacent to each other or arranged with one or more GND terminals interposed therebetween.

  Considering the magnitude of the output of the transmission signal, the influence of signal leakage to other terminals is greatly generated, and there is a high possibility that the signal transmitted through the terminal will be affected. However, as in the embodiment, if two transmission signal input terminals TX are arranged adjacent to each other or sandwiched between the GND terminals, different types of signal terminals are not sandwiched between the two transmission signal input terminals TX. Therefore, it is possible to suppress the influence due to the signal leakage of the transmission signal.

  For example, the transmission signal input terminal TX having the terminal number (15) and the connector connection terminal RFC having the terminal number (13) are arranged adjacent to each other with the GND terminal having the terminal number (14) interposed therebetween. In this way, the influence of signal leakage between the transmission signal input terminal TX and the RF connector connection terminal RFC can be suppressed. Note that the number of GND terminals is not limited to one, and two or more GND terminals may be arranged.

  In the terminal arrangement of this embodiment, the transmission signal input terminal TX and the reception signal output terminal RX are arranged adjacent to each other, or the transmission signal input terminal TX and the antenna terminal ANT are arranged adjacent to each other. Although there is no state in which the reception signal output terminal RX and the RF connector connection terminal RFC are disposed adjacent to each other, the reception signal output terminal RX and the transmission signal input terminal TX are disposed adjacent to each other. When the transmission signal input terminal TX and the antenna terminal ANT are arranged adjacent to each other, or when the reception signal output terminal RX and the RF connector connection terminal RFC are arranged adjacent to each other, the reception signal output is performed. As in the case where the GND terminal is arranged between the terminal RX and the antenna terminal ANT, at least one or more between the two terminals so as not to be arranged adjacent to each other. By placing the GND terminal, it is preferable to suppress the influence of signal leakage between terminals.

  Note that since the control terminal VC is a terminal to which a DC power supply is applied when a transmission signal is transmitted from the antenna, it can be said that the influence of signal leakage between the transmission signal input terminal TX and the control terminal VC is small. Therefore, there is no problem even if the transmission signal input terminal TX with the terminal number (17) and the control terminal VC with the terminal number (18) are arranged adjacent to each other. However, one or more GND terminals may be arranged between the transmission signal input terminal TX and the control terminal VC.

  Note that a GND terminal may be arranged between the signal terminals to suppress the influence of signal leakage between the signal terminals.

  FIG. 4 is an explanatory diagram showing the eighth layer of the multilayer substrate 92 composed of ten conductor layers, and FIG. 5 is an explanatory diagram showing the seventh layer of the multilayer substrate 92 composed of ten conductor layers. FIG. 6 is an explanatory diagram showing the sixth layer of the multilayer substrate 92 composed of ten conductor layers, and FIG. 7 is an explanation showing the third layer of the multilayer substrate 92 composed of ten conductor layers. FIG. The ten conductor layers are a back layer (terminal surface) assigned as the 01st layer, a reverse body layer assigned as the first layer, a surface layer (mounting surface) assigned as the ninth layer, Between the first layer and the ninth layer, there are seven conductor layers of second to eighth layers configured with an insulating layer interposed therebetween.

  The high-pass filter 102b included in the first mixing / demultiplexing circuit 102 in FIG. 1 and the high-pass filter 104b included in the second mixing / demultiplexing circuit 104 have conductor layers (conductor patterns) having the same shape. ing. The high-pass filter 102b of the first mixing / demultiplexing circuit 102 includes three capacitors 102d to 102f, and the high-pass filter 104b of the second mixing / demultiplexing circuit 104 includes three capacitors 102d to 102f of the high-pass filter 102b. Have three capacitors 104d to 104f, respectively.

  Of the electrodes TA1, TB1, TC1, and TD1 constituting the capacitors 102d to 102f of the high-pass filter 102b, the electrode TA1 of the capacitor 102d is provided in the sixth layer (FIG. 6), and the electrode TB1 of the capacitors 102d and 102e is the seventh layer. The electrode TC1 of the capacitor 102e is provided on the eighth layer (FIG. 4), and the electrode TD1 of the capacitor 102f is provided on the third layer (FIG. 7).

  On the other hand, of the electrodes TA2, TB2, TC2, and TD2 constituting the capacitors 104d to 104f of the high-pass filter 104b respectively corresponding to the capacitors 102d to 102f of the high-pass filter 102b, the electrode TA2 of the capacitor 104d and the electrode TA1 of the corresponding capacitor 102d The capacitor 104d and the electrode TB2 of the capacitor 104e are also provided in the same seventh layer as the corresponding electrode TB1 of the capacitor 102d and the capacitor 102e, and the electrode TC2 of the capacitor 104d is also provided with the corresponding electrode TC1 of the capacitor 102e. The electrode TD2 of the capacitor 104f is also provided in the same third layer as the corresponding electrode TD1 of the capacitor 102f.

  As described above, the electrodes of the three capacitors 102d to 102f constituting the high-pass filter 102b of the first mixing / demultiplexing circuit 102 and the three capacitors constituting the high-pass filter 104b of the second mixing / demultiplexing circuit 104 are as described above. By providing the electrodes 104d to 104f on the same layer with the corresponding electrodes, the conductor layers of the multilayer substrate can be provided separately from the case where the conductor layers for providing the capacitor electrode layers are separately prepared. Since the number can be reduced, the thickness of the multilayer substrate can be suppressed.

  In the above embodiment, the electrodes of the three capacitors 102d to 102f constituting the high-pass filter 102b of the first mixing / demultiplexing circuit 102 and 3 constituting the high-pass filter 104b of the second mixing / demultiplexing circuit 104 are used. The electrodes of the two capacitors 104d to 104f are provided in the same layer with the corresponding electrodes, but the present invention is not limited to this, and different electrodes are provided in the same layer instead of the corresponding electrodes. You may do it. Further, instead of providing all of the corresponding electrodes in the same layer, some of the electrodes may be provided in the same layer. In short, it suffices if the layer on which the electrodes constituting the capacitor are provided can be shared to reduce the total number of multilayer substrates.

B. Second embodiment:
FIG. 8 is a circuit diagram of an antenna switch module as a second embodiment of the present invention.

  The antenna switch module 100B of this embodiment is different from the antenna switch module 100A of the first embodiment shown in FIG. 1 in terms of the configuration. As shown in FIG. Instead, a semiconductor switch 102B (first switching circuit) is provided. The other components are the same as those of the first embodiment shown in FIG.

  In the present embodiment, similarly to the antenna switch module 100A of the first embodiment, although it is configured to use two antennas, it can be configured to use only one RF connector. Thus, it is possible to provide an antenna switch module that can use two antennas while suppressing an increase in mounting space.

  In this embodiment, the case where the semiconductor switch 102B is provided instead of the first mixing / demultiplexing circuit 102 has been described as an example. However, a diode switch circuit similar to the transmission / reception switch circuits 106 and 108 is provided. Also good.

C. Variation:
The present invention is not limited to the above-described examples and embodiments, and can be implemented in various modes without departing from the scope of the invention.

  In the above-described embodiments, the antenna switch module has been described as being mounted on a mobile phone, but the present invention is not limited to this, and may be mounted on another communication device.

It is a circuit diagram of the antenna switch module as the 1st example of the present invention. It is a perspective view which shows the external appearance of the antenna switch module of FIG. It is explanatory drawing which showed an example of arrangement | positioning of the terminal in the back layer (terminal surface) of the laminated body 94 shown in FIG. It is explanatory drawing which shows the 8th layer of the multilayer substrate 92 comprised by 10 conductor layers. It is explanatory drawing which shows the 7th layer of the multilayer substrate 92 comprised by 10 conductor layers. It is explanatory drawing which shows the 6th layer of the multilayer substrate 92 comprised by 10 conductor layers. It is explanatory drawing which shows the 3rd layer of the multilayer substrate 92 comprised by 10 conductor layers. It is a circuit diagram of the antenna switch module as the 2nd example of the present invention.

Explanation of symbols

92 ... multilayer substrate 94 ... laminated body 96 ... chip component 98 ... metal cap 100A ... antenna switch module 100B ... antenna switch module 102 ... first mixing / demultiplexing circuit 102a ... low pass filter 102b ... high pass filter 102c ... branch point 102d DESCRIPTION OF SYMBOLS 102-2 ... Capacitor 102B ... Semiconductor switch 104 ... 2nd mixing / demultiplexing circuit 104a ... Low pass filter 104b ... High pass filter 104c ... Branch point 104d-104f ... Capacitor 106 ... Transmission / reception switch circuit 106a, 106b ... Diode 108 ... Transmission / reception switch circuit 108a, 108b ... Diode 110 ... Demultiplexing circuit 110a ... Matching circuit 110b ... Branch point 110c, 110d ... SAW filter 112 ... Low pass filter 114 ... Demultiplexing circuit 11 a ... matching circuit 114b ... branch point 114c, 114d ... SAW filter 116 ... low pass filter 110a ... matching circuit 114a ... matching circuit ANT / Lo ... antenna terminal ANT / Hi ... antenna terminal RFC1 ... RF connector connection terminal RFC2 ... RF connector connection terminal VC1, VC2 ... Control terminals

Claims (17)

An antenna switch module formed on a multilayer substrate in which a plurality of insulating layers and a plurality of conductor layers are alternately laminated,
A plurality of antenna terminals provided on the terminal surface of the multilayer substrate and connected to antennas having different passbands;
A mixing / demultiplexing circuit connected to the plurality of antenna terminals;
An antenna switch module comprising: The antenna switch module according to claim 1, wherein
An antenna switch module comprising: a first connector terminal provided on the terminal surface and connected to the mixing / demultiplexing circuit. The antenna switch module according to claim 1 or 2,
A second connector terminal provided on the terminal surface;
A transmission / reception switch circuit that is connected to the second connector terminal and switches a signal path between a transmission circuit and a reception circuit corresponding to each of a plurality of different communication systems and the second connector terminal;
An antenna switch module further comprising: An antenna switch module formed on a multilayer substrate in which a plurality of insulating layers and a plurality of conductor layers are alternately laminated,
A plurality of antenna terminals provided on the terminal surface of the multilayer substrate and connected to antennas having different passbands;
A first switching circuit connected to the plurality of antenna terminals;
An antenna switch module comprising: The antenna switch module according to claim 4, wherein
An antenna switch module comprising: a first connector terminal provided on the terminal surface and connected to the first switching circuit. In the antenna switch module according to claim 4 or 5,
A second connector terminal provided on the terminal surface;
A transmission / reception switch circuit that is connected to the second connector terminal and switches a signal path between a transmission circuit and a reception circuit corresponding to each of a plurality of different communication systems and the second connector terminal;
An antenna switch module further comprising: The antenna switch module according to claim 3 or 6,
The antenna switch module according to claim 1, wherein the first and second connector terminals are arranged adjacent to each other on the terminal surface, or arranged with a ground terminal interposed therebetween. The antenna switch module according to claim 3 or 6,
At least one antenna terminal and at least one connector terminal are disposed adjacent to each other on the terminal surface, or are disposed with a ground terminal interposed therebetween. The antenna switch module according to any one of claims 1 to 6,
The plurality of antenna terminals are arranged side by side on the terminal surface,
The antenna switch module is characterized in that the antenna terminals are arranged adjacent to each other, or arranged with a ground terminal interposed therebetween. The antenna switch module according to any one of claims 1 to 6,
The plurality of terminals include a plurality of reception signal output terminals,
The plurality of reception signal output terminals are arranged side by side on the terminal surface,
The received signal output terminals are arranged adjacent to each other or arranged with a ground terminal interposed therebetween. The antenna switch module according to claim 10, wherein
The antenna switch module, wherein the reception signal output terminals are all arranged adjacent to each other. The antenna switch module according to any one of claims 1 to 6,
The plurality of terminals include a plurality of reception signal output terminals,
When the received signal output terminal and the connector terminal are arranged side by side, a ground terminal is arranged between the received signal output terminal and the connector terminal. The antenna switch module according to any one of claims 1 to 6,
The plurality of terminals include a plurality of reception signal output terminals,
When the received signal output terminal and the antenna terminal are arranged side by side, a ground terminal is arranged between the received signal output terminal and the antenna terminal. The antenna switch module according to any one of claims 1 to 6,
The plurality of terminals include a plurality of transmission signal input terminals,
The plurality of transmission signal input terminals are arranged side by side on the terminal surface,
The transmission signal input terminals are arranged adjacent to each other, or arranged with a ground terminal interposed therebetween. The antenna switch module according to any one of claims 1 to 6,
The plurality of terminals include a plurality of transmission signal input terminals,
When the transmission signal input terminal and the connector terminal are arranged side by side, a ground terminal is arranged between the transmission signal input terminal and the connector terminal. The antenna switch module according to any one of claims 1 to 6,
The plurality of terminals include a plurality of transmission signal input terminals,
When the transmission signal input terminal and the antenna terminal are arranged side by side, a ground terminal is arranged between the transmission signal input terminal and the antenna terminal. The antenna switch module according to any one of claims 1 to 6,
The plurality of terminals include a plurality of transmission signal input terminals and a plurality of reception signal output terminals,
When the transmission signal input terminal and the reception signal output terminal are arranged side by side, a ground terminal is arranged between the transmission signal input terminal and the reception signal output terminal. module.

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