WO2016125721A1 - 高周波スイッチモジュール - Google Patents
高周波スイッチモジュール Download PDFInfo
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- WO2016125721A1 WO2016125721A1 PCT/JP2016/052865 JP2016052865W WO2016125721A1 WO 2016125721 A1 WO2016125721 A1 WO 2016125721A1 JP 2016052865 W JP2016052865 W JP 2016052865W WO 2016125721 A1 WO2016125721 A1 WO 2016125721A1
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
- H04B1/38—Transceivers, i.e. devices in which transmitter and receiver form a structural unit and in which at least one part is used for functions of transmitting and receiving
- H04B1/40—Circuits
- H04B1/44—Transmit/receive switching
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
- H04B1/38—Transceivers, i.e. devices in which transmitter and receiver form a structural unit and in which at least one part is used for functions of transmitting and receiving
- H04B1/40—Circuits
- H04B1/44—Transmit/receive switching
- H04B1/48—Transmit/receive switching in circuits for connecting transmitter and receiver to a common transmission path, e.g. by energy of transmitter
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- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03H—IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
- H03H7/00—Multiple-port networks comprising only passive electrical elements as network components
- H03H7/01—Frequency selective two-port networks
- H03H7/0115—Frequency selective two-port networks comprising only inductors and capacitors
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- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03H—IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
- H03H7/00—Multiple-port networks comprising only passive electrical elements as network components
- H03H7/46—Networks for connecting several sources or loads, working on different frequencies or frequency bands, to a common load or source
- H03H7/463—Duplexers
- H03H7/465—Duplexers having variable circuit topology, e.g. including switches
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
- H04B1/005—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission adapting radio receivers, transmitters andtransceivers for operation on two or more bands, i.e. frequency ranges
- H04B1/0053—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission adapting radio receivers, transmitters andtransceivers for operation on two or more bands, i.e. frequency ranges with common antenna for more than one band
- H04B1/006—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission adapting radio receivers, transmitters andtransceivers for operation on two or more bands, i.e. frequency ranges with common antenna for more than one band using switches for selecting the desired band
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
- H04B1/005—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission adapting radio receivers, transmitters andtransceivers for operation on two or more bands, i.e. frequency ranges
- H04B1/0064—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission adapting radio receivers, transmitters andtransceivers for operation on two or more bands, i.e. frequency ranges with separate antennas for the more than one band
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
- H04B1/02—Transmitters
- H04B1/04—Circuits
- H04B1/0458—Arrangements for matching and coupling between power amplifier and antenna or between amplifying stages
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
- H04B1/06—Receivers
- H04B1/16—Circuits
- H04B1/18—Input circuits, e.g. for coupling to an antenna or a transmission line
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
- H04B1/38—Transceivers, i.e. devices in which transmitter and receiver form a structural unit and in which at least one part is used for functions of transmitting and receiving
- H04B1/40—Circuits
- H04B1/50—Circuits using different frequencies for the two directions of communication
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- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03H—IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
- H03H1/00—Constructional details of impedance networks whose electrical mode of operation is not specified or applicable to more than one type of network
- H03H2001/0021—Constructional details
- H03H2001/0085—Multilayer, e.g. LTCC, HTCC, green sheets
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- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03H—IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
- H03H7/00—Multiple-port networks comprising only passive electrical elements as network components
- H03H7/01—Frequency selective two-port networks
- H03H2007/013—Notch or bandstop filters
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
- H04B1/38—Transceivers, i.e. devices in which transmitter and receiver form a structural unit and in which at least one part is used for functions of transmitting and receiving
- H04B1/40—Circuits
- H04B1/44—Transmit/receive switching
- H04B1/48—Transmit/receive switching in circuits for connecting transmitter and receiver to a common transmission path, e.g. by energy of transmitter
- H04B2001/485—Transmit/receive switching in circuits for connecting transmitter and receiver to a common transmission path, e.g. by energy of transmitter inhibiting unwanted transmission
Definitions
- the present invention relates to a high-frequency switch module used for a front end portion of a wireless communication device.
- wireless communication devices such as mobile phones are equipped with a front-end circuit capable of communicating many communication bands.
- miniaturization is realized by transmitting and receiving transmission signals and reception signals of a plurality of communication bands using an antenna common to these communication bands.
- many switch modules are employ
- the switch module described in Patent Document 1 includes a plurality of communication band transmission / reception circuits and SPnT (n is an integer of 2 or more) switch elements.
- the common terminal of the switch element is connected to the antenna, and the plurality of selected terminals are connected to the transmission / reception circuit of each communication band.
- one of the transmission / reception circuits of a plurality of communication bands is switched to the antenna and connected.
- carrier aggregation for simultaneously transmitting or receiving a plurality of communication bands has been put into practical use.
- a switch module that realizes carrier aggregation, a switch having an antenna connection terminal for Hi band and an antenna connection terminal for Low band is used. This switch switches and connects the Hi-band antenna connection terminal to a plurality of Hi-band selected terminals, and switches the Low-band antenna connection terminal to a plurality of Low-band selected terminals.
- the harmonic frequency of the Low band transmission signal is close to or overlaps with the fundamental frequency of the Hi band reception signal
- the harmonic component of the Low band transmission signal may wrap around the transmission path of the Hi band reception signal. is there. This is because the selected terminal to which the Hi-band reception signal is output and the selected terminal to which the Low-band transmission signal is input are capacitively coupled in the switch. As a result, the reception sensitivity of the reception signal in the Hi band deteriorates.
- An object of the present invention is to provide a small high-frequency switch module in which transmission / reception characteristics of each communication band are not deteriorated even when carrier aggregation is performed.
- the high frequency switch module of the present invention includes a switch element and an inductor.
- the switch element includes a first common terminal connected to the Hi band antenna, a second common terminal connected to the Low band antenna, a plurality of first selected terminals selectively connected to the first common terminal, And a plurality of second selected terminals selectively connected to the second common terminal.
- the inductor is connected between one first selected terminal of the plurality of first selected terminals and one second selected terminal of the plurality of second selected terminals.
- the first selected terminal and the second selected terminal to which the inductor is connected are simultaneous use terminals that use a plurality of communication bands for an electrical path for simultaneous transmission or reception.
- the high frequency switch module of the present invention preferably has the following configuration.
- the high frequency switch module includes a circuit board on which a switch element and an inductor are mounted.
- a first connection conductor that connects the first selected terminal that is the simultaneous use terminal and the inductor, and a second connection conductor that connects the second selected terminal that is the simultaneous use terminal and the inductor are formed on the circuit board.
- the first connection conductor and the second connection conductor are arranged at different positions in the thickness direction of the circuit board.
- the circuit board includes an inner layer ground conductor between the first connection conductor and the second connection conductor.
- the switch element includes a plurality of communication bands used by the simultaneous use terminal between the first selected terminal that is the simultaneous use terminal and the second selected terminal that is the simultaneous use terminal. Includes a third selected terminal that uses a different communication band.
- the high frequency switch module of the present invention may include a capacitor connected in parallel to the inductor.
- the capacitor of the parallel resonant circuit can be increased, and the inductor can be reduced accordingly.
- the high-frequency switch module can be further reduced in size.
- the high frequency switch module of the present invention may have the following configuration.
- the high-frequency switch module includes a first RF terminal to which a first selected terminal that is a simultaneous use terminal is connected, and a first connection conductor that connects the first RF terminal and the first selected terminal that is a simultaneous use terminal.
- a matching inductor is connected between a first selected terminal that is a simultaneous use terminal in the first connection conductor and the inductor.
- the impedance between the circuit element (for example, an elastic wave filter) connected to the first RF terminal and the first selected terminal can be more accurately matched.
- the high frequency switch module of the present invention may have the following configuration.
- the high-frequency switch module includes a second RF terminal to which a second selected terminal that is a simultaneous use terminal is connected, and a second connection conductor that connects the second RF terminal and the second selected terminal that is a simultaneous use terminal.
- a matching inductor is connected between the inductor in the second connection conductor and the second RF terminal.
- the impedance between the circuit element (for example, an elastic wave filter) connected to the second RF terminal and the second selected terminal can be more accurately matched.
- the high frequency switch module of the present invention may have the following configuration.
- the inductor is a spiral conductor pattern formed on the circuit board.
- the ground conductor formed inside the circuit board and close to the inductor has a shape that does not overlap the spiral central opening.
- the present invention it is possible to realize a small high-frequency switch module in which the transmission / reception characteristics of each communication band are not deteriorated even when a communication that simultaneously transmits or receives a plurality of communication bands such as carrier aggregation is performed.
- FIG. 1 is a circuit diagram of a high-frequency switch module according to the first embodiment of the present invention.
- the high frequency switch module 10 includes a switch element 20 and an inductor 30.
- the high frequency switch module 10 includes a first antenna connection terminal Pant1, a second antenna connection terminal Pant2, and a plurality of RF terminals.
- the plurality of RF terminals include a first RF terminal Pfe1 and a second RF terminal Pfe2.
- the switch element 20 includes a first common terminal P10, a second common terminal P20, and selected terminals P11, P12, P13, P14, P21, P22, P23, and P24.
- the switch element 20 is a DPnT switch made of a semiconductor switch. n may be an integer of 4 or more.
- the first common terminal P10 is selectively connected to any one of the selected terminals P11, P12, P13, and P14.
- the second common terminal P20 is selectively connected to any of the selected terminals P21, P22, P23, P24.
- the first common terminal P10 is connected to the first antenna connection terminal Pant1.
- the first antenna connection terminal Pant1 is connected to the Hi-band antenna ANT1.
- the second common terminal P20 is connected to the second antenna connection terminal Pant2.
- the second antenna connection terminal Pant2 is connected to the antenna ANT2 for Low band.
- the selected terminal P14 is connected to the first RF terminal Pfe1.
- the first RF terminal Pfe1 is connected to a filter element, for example, an elastic wave filter such as a SAW filter or an LC filter.
- the selected terminal P21 is connected to the second RF terminal Pfe2.
- the second RF terminal Pfe2 is connected to a filter element, for example, an elastic wave filter such as a SAW filter or an LC filter.
- the inductor 30 is connected between the selected terminal P14 and the selected terminal P21. More specifically, the inductor 30 is connected between a connection conductor 901 that connects the selected terminal P14 and the first RF terminal Pfe1, and a connection conductor 902 that connects the selected terminal P21 and the second RF terminal Pfe2. Yes.
- the high-frequency switch module 10 having such a circuit configuration is used as follows.
- the plurality of selected terminals P11, P12, P13, and P14 are switched according to the communication band to be transmitted / received and connected to the first common terminal P10.
- the plurality of selected terminals P21, P22, P23, and P24 are switched according to the communication band to be transmitted / received and connected to the second common terminal P20.
- the high frequency switch module 10 can simultaneously transmit and receive a Hi band communication signal and a Low band communication signal. That is, the high frequency switch module 10 can perform carrier aggregation communication.
- the concept of simultaneous transmission and reception according to the present embodiment is that both the Hi band and the Low band are transmitted, both the Hi band and the Low band are received, one of the Hi band and the Low band is transmitted, and the other is received. Including.
- a parallel resonant circuit is configured by the capacitor 210 and the inductor 30 generated between the selected terminal P14 and the selected terminal P21 in the switch element 20.
- the resonance frequency of the parallel resonance circuit is a harmonic component of a low-band transmission signal used for carrier aggregation, and is set to a frequency that is close to or overlaps with the basic frequency of the Hi-band reception signal. For example, when transmission of BAND17 and reception of BAND4 are performed simultaneously, the frequency of the third harmonic of BAND17 and the frequency of the fundamental wave of BAND4 are set to overlap.
- the parallel resonance circuit including the inductor 30 and the capacitor 210 can suppress the output of the harmonic component of the low-band transmission signal input from the second RF terminal from the first RF terminal. . In other words, high isolation between the connection conductor 901 and the connection conductor 902 can be ensured.
- the Hi-band received signal is received while transmitting the Low-band transmission signal (Low-band and Hi-band carrier aggregation), and the fundamental frequency of the received signal and the frequency of the harmonic component of the transmitted signal are close or Even if it overlaps, it can suppress that the receiving sensitivity of a received signal deteriorates.
- FIG. 2 is a graph showing pass characteristics (attenuation characteristics) when a parallel resonant circuit used in the high-frequency switch module according to the first embodiment of the present invention is inserted.
- the solid line is the pass characteristic of the configuration of the present application
- the broken line is the pass characteristic of the comparative configuration (a configuration in which a parallel resonant circuit is not inserted).
- FIG. 2 by providing the parallel resonant circuit according to the present embodiment, it is possible to realize an attenuation characteristic having an attenuation pole at a specific frequency. Thereby, it is possible to obtain an attenuation amount of a predetermined amount or more in a wide band with the attenuation pole frequency as the center. Therefore, even if the harmonic frequency (frequency band) of the low-band transmission signal is close to or partially overlaps with the fundamental frequency (frequency band) of the Hi-band reception signal, the harmonic signal can be attenuated. it can.
- FIG. 3 is a graph showing the isolation characteristics of the configuration and comparative configuration of the high-frequency switch module according to the first embodiment of the present invention.
- the comparative configuration is a configuration that does not include the inductor 30.
- the harmonic component of the low-band transmission signal input from the second RF terminal leaks to the first RF terminal and is output. However, this leakage is suppressed by providing the configuration of the present application.
- the configuration of the present embodiment it is possible to prevent the harmonic component of the low-band transmission signal during carrier aggregation from leaking to the output terminal of the Hi-band reception signal. Thereby, the reception sensitivity of the reception signal of Hi band at the time of carrier aggregation can be improved. Furthermore, by using the configuration of the present embodiment, even if the selected terminals that are simultaneously used in carrier aggregation are close to each other, it is possible to ensure high isolation between the connection conductors connected to these selected terminals. . That is, even if carrier aggregation is performed, a small high-frequency switch module that does not deteriorate the transmission / reception characteristics of a communication band that is a target of carrier aggregation can be realized.
- FIG. 4 is a plan view of the high-frequency switch module according to the first embodiment of the present invention. In FIG. 4, only the portions characteristic of the present application in the high-frequency switch module 10 are illustrated.
- the high-frequency switch module 10 includes a laminated body 90, a mounting type switch element 20, and a mounting type inductor 30.
- the laminated body 90 is formed by laminating dielectric substrates having conductor patterns formed at predetermined positions.
- the mounting type switch element 20 and the mounting type inductor 30 are mounted on the surface of the multilayer body 90.
- the land conductor LE301 on which one outer conductor of the inductor 30 is mounted and the land conductor LE14 on which the selected terminal P14 of the switch element 20 is mounted are connected by a connection conductor 901 formed in the multilayer body 90.
- the land conductor LE302 on which the other outer conductor of the inductor 30 is mounted and the land conductor LE21 on which the selected terminal P21 of the switch element 20 is mounted are connected by a connection conductor 902 formed in the multilayer body 90.
- the inductor 30 is mounted in the vicinity of the selected terminals P14 and P21 in the switch element 20.
- the connecting conductors 901 and 902 are formed as short as possible.
- This configuration can suppress capacitive coupling of the connection conductors 901 and 902. As a result, the isolation on the selected terminal side of the switch element 20 can be further improved.
- FIG. 5 is a partial cross-sectional view showing the structure of the high-frequency switch module according to the second embodiment of the present invention.
- the high-frequency switch module 10A of this embodiment is different from the high-frequency switch module 10 of the first embodiment in the structure of the connection conductors 901 and 902.
- connection conductor 901 extending in the direction perpendicular to the stacking direction of the stacked body 90 is disposed at a position corresponding to the dielectric layer Ly01 of the stacked body 90.
- a portion of the connection conductor 902 extending in a direction orthogonal to the stacking direction of the stacked body 90 is disposed at a position corresponding to the dielectric layer Ly02 of the stacked body 90.
- connection conductor 901 a portion extending in the direction orthogonal to the stacking direction of the multilayer body 90 in the connection conductor 901 and a portion extending in the direction orthogonal to the stacking direction of the multilayer body 90 in the connection conductor 902 are obtained when the multilayer body 90 is viewed in plan view. Also, they are arranged at different positions when viewed from the side. Thereby, capacitive coupling between the connection conductor 901 and the connection conductor 902 can be further suppressed. Therefore, the isolation on the selected terminal side of the switch element 20 can be further improved.
- the dielectric layer Ly03 is disposed between the dielectric layer Ly01 where the connection conductor 901 is disposed and the dielectric layer Ly02 where the connection conductor 902 is disposed.
- An inner layer ground conductor 911G is formed on the dielectric layer Ly03.
- FIG. 6 is a plan view showing the structure of the high-frequency switch module according to the third embodiment of the present invention.
- the land conductor LE301 on which one outer conductor of the inductor 30 is mounted and the land conductor LE14B on which the selected terminal P14B of the switch element 20 is mounted are formed in the multilayer body 90. They are connected by a connection conductor 901B.
- the land conductor LE302 on which the other outer conductor of the inductor 30 is mounted and the land conductor LE21 on which the selected terminal P21 of the switch element 20 is mounted are connected by a connection conductor 902 formed in the multilayer body 90.
- a selected terminal that does not perform carrier aggregation is disposed simultaneously with these terminals.
- connection conductor 901B and 902 where leakage of the high-frequency signal is a problem are separated, and other selected terminals are arranged between these selected terminals.
- connection conductor 901B and the connection conductor 902 connected to these terminals are separated from each other. Accordingly, capacitive coupling between the connection conductor 901B and the connection conductor 902 can be suppressed. Therefore, the isolation on the selected terminal side of the switch element 20 can be further improved.
- FIG. 7 is a circuit diagram of a high-frequency switch module according to the fourth embodiment of the present invention.
- the high frequency switch module 10C according to the present embodiment is obtained by adding a capacitor 31 to the high frequency switch module 10 according to the first embodiment.
- the capacitor 31 is connected in parallel to the inductor 30.
- the capacitance constituting the parallel resonant circuit is a combined capacitance of the capacitance of the capacitor 31 and the capacitance formed by capacitive coupling between the connected terminals.
- the capacitance of the parallel resonant circuit can be increased.
- the inductance of the inductor 30 can be reduced.
- the inductor 30 can be formed in a small size. Therefore, the high frequency switch module 10C can be formed in a smaller size.
- FIG. 8 is a circuit diagram of a high-frequency switch module according to the fifth embodiment of the present invention.
- the high-frequency switch module 10D of this embodiment is obtained by adding a matching inductor 51 to the high-frequency switch module 10 of the first embodiment.
- the matching inductor 51 is connected between the selected terminal P14 in the connection conductor 901 and one outer conductor of the inductor 30.
- the impedance of the inductor 30 and the first RF terminal Pfe1 viewed from the switch element 20 can be shifted from capacitive to inductive.
- the impedance viewed from the selected terminal P14 is the same as that viewed from the selected terminal P21. Capacitance is higher than impedance.
- the impedance viewed from the selected terminal P14 and the impedance viewed from the selected terminal P21 at the frequency of the high-frequency signal to be transmitted can be made the same level. it can.
- FIG. 9 is a circuit diagram of a high-frequency switch module according to the sixth embodiment of the present invention.
- the high-frequency switch module 10E of this embodiment is obtained by adding a matching inductor 52 to the high-frequency switch module 10 of the first embodiment.
- the matching inductor 52 is connected between the other outer conductor of the inductor 30 in the connection conductor 902 and the second RF terminal Pfe2.
- impedance when the second RF terminal Pfe2 is viewed from the inductor 30 and the switch element 20 (more specifically, an elastic wave filter connected from the inductor 30 and the switch element 20 to the second RF terminal Pfe2 is provided.
- impedance viewed can be shifted from capacitive to inductive. For example, when the frequency of the high frequency signal transmitted by the SAW filter 42 connected to the second RF terminal Pfe2 is lower than the frequency of the high frequency signal transmitted by the SAW filter 41 connected to the first RF terminal Pfe1, the second RF terminal Pfe2 was viewed. The impedance is more capacitive than the impedance viewed from the first RF terminal Pfe1.
- the impedance viewed from the first RF terminal Pfe1 and the impedance viewed from the second RF terminal Pfe2 at the frequency of the high-frequency signal to be transmitted can be made approximately the same. it can.
- FIG. 10 is a partial cross-sectional view showing the structure of the high-frequency switch module according to the seventh embodiment of the present invention.
- the high-frequency switch module 10F of this embodiment is different from the high-frequency switch module 10 according to the first embodiment in that an inductor 30F is formed in the multilayer body 90.
- the inductor 30 ⁇ / b> F is formed in a spiral shape by a conductor pattern formed in the multilayer body 90. At this time, the winding axis of the inductor 30F is parallel to the stacking direction.
- the internal ground conductor (ground conductor adjacent to the inductor of the present invention) 912G of the multilayer body 90 is formed over substantially the entire surface of the multilayer body 90 in plan view, but includes an opening 911.
- the opening 911 overlaps the spiral central opening of the inductor 30F with the multilayer body 90 being planar.
- the shape of the high-frequency switch module 10F viewed in plan can be made smaller than the shape of the high-frequency switch module 10 viewed in plan. Furthermore, since the magnetic field generated by the inductor 30F is not hindered by the internal ground conductor 910G, deterioration of the Q of the inductor 30F can be suppressed. As a result, the isolation on the selected terminal side of the switch element 20 can be further improved.
- the resonant circuit may be a circuit that connects a plurality of LC parallel resonant circuits in series.
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Abstract
Description
20:スイッチ素子
30,30D,30F:インダクタ
31:キャパシタ
51,52:整合用インダクタ
53:特性調整用インダクタ
90:積層体
901,902,901B:接続導体
911G,912G:内部グランド導体
911:開口部
Claims (8)
- Hiバンド用のアンテナに接続する第1共通端子、Lowバンド用のアンテナに接続する第2共通端子、前記第1共通端子に選択的に接続される複数の第1被選択端子、および第2共通端子に選択的に接続される複数の第2被選択端子を備えるスイッチ素子と、
前記複数の第1被選択端子における1つの第1被選択端子と、前記複数の第2被選択端子における1つの第2被選択端子との間に接続されるインダクタと、
を備える高周波スイッチモジュール。 - 前記インダクタが接続される第1被選択端子と第2被選択端子は、複数の通信バンドを同時送信または同時受信する電気経路に利用する同時利用端子である、
請求項1に記載の高周波スイッチモジュール。 - 前記スイッチ素子と前記インダクタが実装される回路基板を備え、
前記同時利用端子である前記第1被選択端子と前記インダクタを接続する第1接続導体と、前記同時利用端子である前記第2被選択端子と前記インダクタを接続する第2接続導体は、前記回路基板に形成されており、
前記第1接続導体と前記第2接続導体は、前記回路基板の厚み方向に異なる位置に配置されており、
前記回路基板は、
前記第1接続導体と前記第2接続導体との間に内層グランド導体を備える、
請求項2に記載の高周波スイッチモジュール。 - 前記スイッチ素子は、
前記同時利用端子である前記第1被選択端子と前記同時利用端子である前記第2被選択端子の間に、前記同時利用端子が利用する前記複数の通信バンドとは異なる別の通信バンドを利用する第3被選択端子を備える、
請求項2または請求項3に記載の高周波スイッチモジュール。 - 前記インダクタに並列接続するキャパシタを備える、
請求項2乃至請求項4のいずれかに記載の高周波スイッチモジュール。 - 前記同時利用端子である前記第1被選択端子が接続する第1RF端子と、前記第1RF端子と前記同時利用端子である前記第1被選択端子を接続する第1接続導体と、を備え、
前記第1接続導体における前記同時利用端子である前記第1被選択端子と前記インダクタとの間に、整合用インダクタが接続されている、
請求項2乃至請求項5のいずれかに記載の高周波スイッチモジュール。 - 前記同時利用端子である前記第2被選択端子が接続する第2RF端子と、前記第2RF端子と前記同時利用端子である前記第2被選択端子を接続する第2接続導体と、を備え、
前記第2接続導体における前記インダクタと前記第2RF端子との間に、整合用インダクタが接続されている、
請求項2乃至請求項5のいずれかに記載の高周波スイッチモジュール。 - 前記インダクタは、回路基板に形成されたスパイラル形状の導体パターンであり、
前記回路基板の内部に形成され、前記インダクタに近接するグランド導体は、前記スパイラル形状の中央開口部に重ならない形状である、
請求項2乃至請求項7のいずれかに記載の高周波スイッチモジュール。
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