US20140347145A1 - High frequency circuit module - Google Patents
High frequency circuit module Download PDFInfo
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- US20140347145A1 US20140347145A1 US14/453,345 US201414453345A US2014347145A1 US 20140347145 A1 US20140347145 A1 US 20140347145A1 US 201414453345 A US201414453345 A US 201414453345A US 2014347145 A1 US2014347145 A1 US 2014347145A1
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- high frequency
- power amplifier
- circuit substrate
- duplexer
- signal
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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
- H03H1/0007—Constructional details of impedance networks whose electrical mode of operation is not specified or applicable to more than one type of network of radio frequency interference filters
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K1/00—Printed circuits
- H05K1/18—Printed circuits structurally associated with non-printed electric components
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L23/00—Details of semiconductor or other solid state devices
- H01L23/34—Arrangements for cooling, heating, ventilating or temperature compensation ; Temperature sensing arrangements
- H01L23/36—Selection of materials, or shaping, to facilitate cooling or heating, e.g. heatsinks
- H01L23/367—Cooling facilitated by shape of device
- H01L23/3677—Wire-like or pin-like cooling fins or heat sinks
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
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- H01L23/00—Details of semiconductor or other solid state devices
- H01L23/34—Arrangements for cooling, heating, ventilating or temperature compensation ; Temperature sensing arrangements
- H01L23/36—Selection of materials, or shaping, to facilitate cooling or heating, e.g. heatsinks
- H01L23/373—Cooling facilitated by selection of materials for the device or materials for thermal expansion adaptation, e.g. carbon
- H01L23/3735—Laminates or multilayers, e.g. direct bond copper ceramic substrates
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- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03H—IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
- H03H11/00—Networks using active elements
- H03H11/02—Multiple-port networks
- H03H11/34—Networks for connecting several sources or loads working on different frequencies or frequency bands, to a common load or source
- H03H11/344—Duplexers
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- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03H—IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
- H03H11/00—Networks using active elements
- H03H11/02—Multiple-port networks
- H03H11/34—Networks for connecting several sources or loads working on different frequencies or frequency bands, to a common load or source
- H03H11/348—Networks for connecting several sources or loads working on different frequencies or frequency bands, to a common load or source particularly adapted as coupling circuit between transmitters and antenna
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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
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- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03H—IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
- H03H9/00—Networks comprising electromechanical or electro-acoustic devices; Electromechanical resonators
- H03H9/02—Details
- H03H9/05—Holders; Supports
- H03H9/08—Holders with means for regulating temperature
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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
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- 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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- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L5/00—Arrangements affording multiple use of the transmission path
- H04L5/14—Two-way operation using the same type of signal, i.e. duplex
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K1/00—Printed circuits
- H05K1/02—Details
- H05K1/0201—Thermal arrangements, e.g. for cooling, heating or preventing overheating
- H05K1/0203—Cooling of mounted components
- H05K1/0204—Cooling of mounted components using means for thermal conduction connection in the thickness direction of the substrate
- H05K1/0206—Cooling of mounted components using means for thermal conduction connection in the thickness direction of the substrate by printed thermal vias
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- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K1/00—Printed circuits
- H05K1/02—Details
- H05K1/0201—Thermal arrangements, e.g. for cooling, heating or preventing overheating
- H05K1/0203—Cooling of mounted components
- H05K1/0207—Cooling of mounted components using internal conductor planes parallel to the surface for thermal conduction, e.g. power planes
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K1/00—Printed circuits
- H05K1/02—Details
- H05K1/0213—Electrical arrangements not otherwise provided for
- H05K1/0216—Reduction of cross-talk, noise or electromagnetic interference
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K1/00—Printed circuits
- H05K1/18—Printed circuits structurally associated with non-printed electric components
- H05K1/182—Printed circuits structurally associated with non-printed electric components associated with components mounted in the printed circuit board, e.g. insert mounted components [IMC]
- H05K1/185—Components encapsulated in the insulating substrate of the printed circuit or incorporated in internal layers of a multilayer circuit
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K3/00—Apparatus or processes for manufacturing printed circuits
- H05K3/46—Manufacturing multilayer circuits
- H05K3/4602—Manufacturing multilayer circuits characterized by a special circuit board as base or central core whereon additional circuit layers are built or additional circuit boards are laminated
- H05K3/4608—Manufacturing multilayer circuits characterized by a special circuit board as base or central core whereon additional circuit layers are built or additional circuit boards are laminated comprising an electrically conductive base or core
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- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L2224/00—Indexing scheme for arrangements for connecting or disconnecting semiconductor or solid-state bodies and methods related thereto as covered by H01L24/00
- H01L2224/01—Means for bonding being attached to, or being formed on, the surface to be connected, e.g. chip-to-package, die-attach, "first-level" interconnects; Manufacturing methods related thereto
- H01L2224/10—Bump connectors; Manufacturing methods related thereto
- H01L2224/15—Structure, shape, material or disposition of the bump connectors after the connecting process
- H01L2224/16—Structure, shape, material or disposition of the bump connectors after the connecting process of an individual bump connector
- H01L2224/161—Disposition
- H01L2224/16151—Disposition the bump connector connecting between a semiconductor or solid-state body and an item not being a semiconductor or solid-state body, e.g. chip-to-substrate, chip-to-passive
- H01L2224/16221—Disposition the bump connector connecting between a semiconductor or solid-state body and an item not being a semiconductor or solid-state body, e.g. chip-to-substrate, chip-to-passive the body and the item being stacked
- H01L2224/16225—Disposition the bump connector connecting between a semiconductor or solid-state body and an item not being a semiconductor or solid-state body, e.g. chip-to-substrate, chip-to-passive the body and the item being stacked the item being non-metallic, e.g. insulating substrate with or without metallisation
- H01L2224/16227—Disposition the bump connector connecting between a semiconductor or solid-state body and an item not being a semiconductor or solid-state body, e.g. chip-to-substrate, chip-to-passive the body and the item being stacked the item being non-metallic, e.g. insulating substrate with or without metallisation the bump connector connecting to a bond pad of the item
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- H01L2924/00—Indexing scheme for arrangements or methods for connecting or disconnecting semiconductor or solid-state bodies as covered by H01L24/00
- H01L2924/0001—Technical content checked by a classifier
- H01L2924/0002—Not covered by any one of groups H01L24/00, H01L24/00 and H01L2224/00
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- H01L2924/00—Indexing scheme for arrangements or methods for connecting or disconnecting semiconductor or solid-state bodies as covered by H01L24/00
- H01L2924/15—Details of package parts other than the semiconductor or other solid state devices to be connected
- H01L2924/151—Die mounting substrate
- H01L2924/1517—Multilayer substrate
- H01L2924/15192—Resurf arrangement of the internal vias
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- H01L2924/00—Indexing scheme for arrangements or methods for connecting or disconnecting semiconductor or solid-state bodies as covered by H01L24/00
- H01L2924/15—Details of package parts other than the semiconductor or other solid state devices to be connected
- H01L2924/151—Die mounting substrate
- H01L2924/153—Connection portion
- H01L2924/1531—Connection portion the connection portion being formed only on the surface of the substrate opposite to the die mounting surface
- H01L2924/15313—Connection portion the connection portion being formed only on the surface of the substrate opposite to the die mounting surface being a land array, e.g. LGA
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- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L2924/00—Indexing scheme for arrangements or methods for connecting or disconnecting semiconductor or solid-state bodies as covered by H01L24/00
- H01L2924/30—Technical effects
- H01L2924/35—Mechanical effects
- H01L2924/351—Thermal stress
- H01L2924/3511—Warping
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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
- H03H9/00—Networks comprising electromechanical or electro-acoustic devices; Electromechanical resonators
- H03H9/02—Details
- H03H9/05—Holders; Supports
- H03H9/0538—Constructional combinations of supports or holders with electromechanical or other electronic elements
- H03H9/0566—Constructional combinations of supports or holders with electromechanical or other electronic elements for duplexers
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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
- H04B1/54—Circuits using the same frequency for two directions of communication
- H04B1/58—Hybrid arrangements, i.e. arrangements for transition from single-path two-direction transmission to single-direction transmission on each of two paths or vice versa
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K1/00—Printed circuits
- H05K1/02—Details
- H05K1/0213—Electrical arrangements not otherwise provided for
- H05K1/0237—High frequency adaptations
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K1/00—Printed circuits
- H05K1/02—Details
- H05K1/0213—Electrical arrangements not otherwise provided for
- H05K1/0237—High frequency adaptations
- H05K1/0243—Printed circuits associated with mounted high frequency components
Definitions
- the present invention relates to a high frequency circuit module in which a high frequency integrated circuit (IC), a power amplifier IC, and a duplexer are mounted on a circuit substrate, and more particularly, to an arrangement of components of a high frequency circuit module.
- IC integrated circuit
- power amplifier IC power amplifier
- duplexer duplexer
- a high frequency circuit module with a circuit substrate having thereon various components for transmitting and receiving a high frequency signal is mounted on a mother board (for example, see Patent Document 1).
- a high frequency integrated circuit (IC) configured to transmit and receive a high frequency signal
- a power amplifier IC configured to amplify a transmission signal
- a transmission filter, a reception filter, a high frequency switch, and the like are mounted on a circuit substrate.
- An output signal of the power amplifier IC passes through, in sequence, a transmission matching circuit, the transmission filter and the high frequency switch, and is then outputted through an antenna.
- a reception signal received through the antenna passes through, in sequence, the high frequency switch, the reception filter and a receiving matching circuit and is then inputted to the high frequency IC.
- a signal wire for transmitting the transmission signal from the high frequency IC to the high frequency switch and a signal wire for transmitting the reception signal from the high frequency switch to the high frequency IC are disposed on the circuit substrate in a manner that these signal wires do not intersect with each other and are not adjacent to each other.
- Patent Document 2 discloses a multi-mode high frequency circuit in which a GSM-based circuit system unrelated to an operation of W-CDMA circuit system is disposed along a shortest path between the circuit system configured to handle a W-CDMA RF transmission signal and a receiving circuit configured to handle a W-CDMA RF reception signal capable of reducing signal interference between a W-CDMA transmission circuit and a W-CDMA receiving circuit.
- the power amplifier IC is disposed immediately adjacent to the high frequency IC such that a signal wire for a reception signal passes through the vicinity of the power amplifier IC due to miniaturization and high density. Thus, noise or a leakage signal generated by the power amplifier IC is likely to enter into a receiving circuit of the high frequency IC.
- a duplexer 100 is distant from the high frequency IC 310 although a W-PA-IC 121 corresponding to the power amplifier IC is spaced apart from a high frequency IC 310 .
- noise or a leakage signal generated by the power amplifier IC is mixed with a reception signal passing through the duplexer 100 in the receiving circuit of the high frequency IC.
- the present invention is made in view of the above-mentioned situation, and an object thereof is to provide a high frequency circuit module having a high installation density.
- a high frequency circuit module includes: a circuit substrate having alternately stacked insulating layers and conductive layers; a high frequency IC that is mounted on the circuit substrate and that performs transmission and reception of a high frequency signal; a power amplifier IC that is mounted on the circuit substrate and that amplifies a transmission signal from the high frequency IC; and a duplexer that separates the transmission signal outputted from the power amplifier IC to the antenna from a reception signal inputted from the antenna to the high frequency IC, wherein either one or both of the high frequency IC and the power amp IC is embedded in the circuit substrate and the duplexer is disposed between the high frequency IC and the power amp IC when viewing through the circuit substrate from the top.
- a signal wire for inputting the reception signal from the duplexer to the high frequency IC need not be disposed near the power amplifier IC, and can be shortened. Such structure facilitates the miniaturization and high density while preventing noise from entering the receiving circuit of the high frequency IC.
- the transmission signal outputted from the high frequency IC passes through the vicinity of the duplexer to be inputted to the power amplifier IC.
- the transmission signal has not been amplified yet, the transmission signal has only a small influence on the duplexer or other circuits. Since the power amplifier IC and the duplexer are disposed adjacent to each other, the length of the signal wire for transmitting the amplified transmission signal can be reduced.
- the signal wire for transmitting the signal amplified by the power amplifier IC to the duplexer can be shorter than the signal wire for transmitting the signal before amplification outputted from the high frequency IC. Accordingly, power loss and noise may be minimized.
- the duplexer may be mounted on or embedded in the circuit substrate.
- a ground electrode is formed on a bottom surface of the circuit substrate, the power amplifier IC is embedded in the circuit substrate, and a heat dissipation electrode of the power amplifier IC is connected to the ground electrode on the bottom surface of the circuit substrate through the via conductor.
- the distance between the heat-dissipating electrode of the power amplifier IC and the ground electrode disposed at a bottom surface of the circuit substrate may be minimized, thereby improving the heat dissipation efficiency.
- a preferred example of the present invention includes a core layer that is a conductive layer having a thickness greater than other conductive layers and that functions as a ground; a ground electrode disposed on a bottom surface, wherein one or both of the high frequency IC and the power amplifier IC is disposed in a penetrating hole or a recess formed in the core layer. According to the present invention, the shielding and heat dissipating properties of high frequency IC and the power amplifier IC are improved due to the core layer.
- a high frequency circuit module includes: a circuit substrate having alternately stacked insulating layers and conductive layers; and a power amplifier IC mounted on one surface of the circuit substrate, wherein the circuit substrate includes: a terminal electrode formed on another surface of the circuit substrate, in a region projected in the thickness direction of a region where the power amplifier IC is formed; a first via conductor for heat dissipation that connects the terminal of the power amplifier IC to a conductive layer in the circuit substrate; and a second via conductor for heat dissipation that connects the conductive layer to a ground electrode.
- the heat generated in the power amplifier IC is transmitted by the first via conductor in the thickness direction of the circuit substrate, and is transmitted in the left and right direction along the conductive layer.
- the heat in the conductive layer is transmitted to the ground electrode of the circuit substrate through the second via conductor, and is dissipated to a mother circuit substrate in which the conductive layer is disposed.
- a high frequency circuit module of the present invention includes: a circuit substrate having stacked insulating layers and conductive layers; a high frequency IC that is mounted on the circuit substrate and that performs transmission and reception of a high frequency signal; a power amplifier IC that is mounted on the circuit substrate and that amplifies a transmission signal from the high frequency IC; and a duplexer having a transmission filter that performs filtering on the transmission signal outputted from the power amplifier IC to the antenna, and a reception filter that performs filtering on a reception signal inputted from the antenna to the high frequency IC, wherein the transmission filter is disposed closer to the power amplifier IC than the reception filter is.
- the present invention it is possible to make the signal line that transmits the transmission signal amplified by the power amplifier IC to the transmission filter of the duplexer short, and thus, it is possible to attain miniaturization and increased density while preventing noise in the reception circuit of the high frequency IC, and to decrease power loss and radiation of noise.
- the signal wire for inputting the reception signal from a duplexer to the high frequency IC need not be disposed adjacent to the power amplifier IC.
- the length of the signal wire for inputting the reception signal from the duplexer to the high frequency IC can be reduced. Such structure facilitates the miniaturization and high density while preventing noise from entering the receiving circuit of the high frequency IC.
- FIG. 1 is a circuit diagram schematically illustrating a high frequency circuit module according to Embodiment 1 of the present invention.
- FIG. 2 is a top view of the high frequency circuit module according to Embodiment 1 of the present invention.
- FIG. 3 is a bottom view of the high frequency circuit module according to Embodiment 1 of the present invention.
- FIG. 4 is a cross-sectional view of the high frequency circuit module according to Embodiment 1 of the present invention.
- FIG. 5 is a top view of a high frequency circuit module according to another example of Embodiment 1 of the present invention.
- FIG. 6 is a top view of a high frequency circuit module according to Embodiment 2 of the present invention.
- FIG. 7 is a bottom view of the high frequency circuit module according to Embodiment 2 of the present invention.
- FIG. 8 is a cross-sectional view of the high frequency circuit module according to Embodiment 2 of the present invention.
- FIG. 1 is a circuit diagram schematically illustrating a high frequency circuit module.
- the description of Embodiment 1 will be focused on the main constitution of the present invention for simplification.
- a high frequency circuit module 100 according to Embodiment 1 is preferably used in mobile phones employing two frequency bands.
- the high frequency circuit module 100 includes a high frequency switch 101 , a first duplexer 110 , a second duplexer 120 , high frequency transmission power amplifiers 151 and 152 for transmission, and a radio-frequency integrated circuit (RFIC) 160 .
- RFIC radio-frequency integrated circuit
- the high frequency circuit module 100 includes a matching circuit, a band pass filter for a transmission signal, and the like for each of frequency bands when implemented as an actual circuit, they are omitted in the present embodiment for simplification.
- the high frequency switch 101 switches between a connection between the first duplexer 110 and an external antenna 10 and a connection between the second duplexer 120 and the external antenna 10 .
- the first duplexer 110 includes a transmission filter 112 and a reception filter 114
- the second duplexer 120 includes a transmission filter 122 and a reception filter 124 .
- Various filters such as a surface acoustic wave (SAW) filter and a bulk acoustic wave (BAW) filter may be used as the transmission filters 112 and 122 and the reception filters 114 and 124 .
- the SAW filter is used.
- the transmission filters 112 and 122 are connected to a transmission port of the RFIC 160 through the high frequency power amplifiers 151 and 152 , respectively.
- the reception filters 114 and 124 are connected to a receiving port of the RFIC 160 .
- the high frequency power amplifiers 151 and 152 are packaged into a single power amplifier IC 155 .
- the RFIC 160 performs transmission processing and reception processing such as modulation/demodulation or multiplexing on a high frequency signal.
- FIG. 2 is a top view of the high frequency circuit module 100 .
- FIG. 3 is a bottom view of the high frequency circuit module 100 .
- FIG. 4 is a cross-sectional view along line A-A of FIG. 2 .
- the RFIC 160 , the first duplexer 110 , the power amplifier IC 155 and the high frequency switch 101 are mounted on a top surface of a circuit substrate 200 in the high frequency circuit module 100 .
- the first transmission filter 112 and the first reception filter 114 are housed in one surface-mount package to constitute the first duplexer 110 .
- the second duplexer 120 is embedded in the circuit substrate 200 .
- the second duplexer 120 has a structure in which elements thereof (the transmission filter 122 , the reception filter 124 , etc.) are individually embedded in the circuit substrate 200 . That is, the elements of the second duplexer 120 are not housed in a single package contrary to the first duplexer 110 .
- the circuit substrate 200 is multilayered and includes alternately stacked insulating layers and conductive layers. As shown in FIG. 4 , the circuit substrate 200 includes a core layer 210 , which is a conductive layer having high conductivity and made of a relatively thick metal, a plurality of insulating layers 221 and a plurality of conductive layers 222 that are disposed on a first main surface, i.e., a top surface, of the core layer 210 and a plurality of insulating layers 231 and a plurality of conductive layers 232 that are disposed on a second main surface, i.e., a bottom surface, of the core layer 210 .
- a core layer 210 which is a conductive layer having high conductivity and made of a relatively thick metal
- a plurality of insulating layers 221 and a plurality of conductive layers 222 that are disposed on a first main surface, i.e., a top surface, of the core layer 210 and a plurality of insulating
- the insulating layers 221 and 231 and the conductive layers 222 and 232 are disposed on the respective main surfaces of the core layer 210 according to a build-up technique.
- two layers among the conductive layers 222 disposed between the first main surface (top surface) of the core layer 210 and the first main surface (top surface) of the circuit substrate 200 and one layer among the conductive layers 232 disposed between the second main surface (bottom surface) of the core layer 210 and the second main surface (top surface) of the circuit substrate 200 serve as ground conductive layers 225 , 226 and 235 of a reference potential (ground).
- the ground conductive layers 225 and 235 are the conductive layers 222 and 232 closest to the core layer 210 , and connected to the core layer 210 through a via conductor 241 .
- the core layer 210 may also serve as a ground conductor.
- the conductive layer 222 is disposed between the two ground conductive layers 225 and 226 and enables a wire formed in the conductive layer 222 to serve as a strip line.
- Conductive lands 201 or wires 202 are disposed on the first main surface (top surface) of the circuit substrate 200 for mounting components thereon.
- a plurality of terminal electrodes 205 are disposed on an edge portion of the second main surface (bottom surface) of the circuit substrate 200 .
- a plurality of ground electrodes 206 that are larger than the plurality of terminal electrodes 205 in area are disposed on a region of the second main surface (bottom surface) of circuit substrate 200 interior to the region where the plurality of terminal electrodes 205 are disposed.
- the RFIC 160 , the first duplexer 110 and the power amplifier IC 155 are soldered to the plurality of lands 201 .
- Penetrating holes 211 for housing components are formed in the core layer 210 .
- the second transmission filter 122 and the second reception filter 124 of the second duplexer 120 are disposed.
- the core layer 210 is preferably thicker than the components embedded therein.
- the core layer 210 is made of a metal plate, and more particularly, a metal plate made of copper or a copper alloy. Spaces between the components housed in the penetrating holes 211 are filled with an insulator such as a resin, such that the insulating layer 221 or 231 is integrally formed with the insulator.
- Terminal electrodes 122 a and 124 a are disposed on a top surface of the second transmission filter 122 and a top surface of the second reception filter 124 , respectively.
- the terminal electrodes 122 a and 124 a are connected to the conductive layers 222 through a via conductor 242 .
- the high frequency circuit module 100 is characterized in that the first duplexer 110 and the second duplexer 120 (i.e., the second transmission filter 122 and the second reception filter 124 ) are disposed between the RFIC 160 and the power amplifier IC 155 as shown in FIG. 2 .
- the first duplexer 110 and the second duplexer 120 i.e., the second transmission filter 122 and the second reception filter 124
- the second duplexer 120 i.e., the second transmission filter 122 and the second reception filter 124
- the reception signal received from the first duplexer 110 is inputted to the RFIC 160 through the signal wire 170 disposed on the top surface of the circuit substrate 200 .
- the transmission signal outputted from the RFIC 160 is inputted to the power amplifier IC 155 through a signal wire 180 disposed on an internal layer of the circuit substrate 200 , and more particularly, on the conductive layers 222 interposed between the two ground conductive layers 225 and 226 .
- An amplified transmission signal outputted from the power amplifier IC is inputted to the first duplexer 110 through a signal wire 185 disposed on the top surface of the circuit substrate 200 .
- the signal wire 185 for transmitting the signal amplified by the power amplifier IC is shorter than the signal wire 180 for transmitting a signal before amplification outputted from the RFIC 160 .
- signal wires through which signals are inputted to and outputted from the second duplexer 120 are omitted for simplification.
- the high frequency circuit module 100 is also characterized in that the power amplifier IC 155 is installed at the edge portion of the circuit substrate 200 as shown in FIGS. 2 and 3 . As shown in FIG. 3 , when viewed from the top of the circuit substrate 200 , the power amplifier IC 155 overlaps a portion of the terminal electrodes 205 . In addition, as shown in FIG. 4 , a ground terminal 155 a of the power amplifier IC 155 is mounted on the lands 201 of the circuit substrate 200 , and the lands 201 are connected to the core layer 210 through a plurality of via conductors 243 for heat dissipation.
- the core layer 210 is connected to the ground electrodes 206 below the core layer 210 through a plurality of conductors 244 for heat dissipation.
- the heat generated from the power amplifier IC 155 is conducted in the vertical direction of the circuit substrate 200 through the via conductors 243 and along the core layer 210 in the horizontal direction.
- the heat generated from the core layer 210 is conducted to the ground electrodes 206 through the conductors 244 , and dissipated to the circuit substrate 200 where the core layer 210 is disposed.
- the signal wire for inputting the reception signal from the duplexer 110 or 120 to the RFIC 160 need not be located near the power amplifier IC 155 .
- the length of the signal wire for inputting the reception signal from the duplexer 110 or 120 to the RFIC 160 can be reduced.
- Such structure facilitates the miniaturization and high density while preventing noise from entering the receiving circuit of the RFIC 160 .
- the transmission signal outputted from the RFIC 160 passes through the vicinity of the duplexers 110 and 120 to be inputted to the power amplifier IC 155 .
- the transmission signal has only a small influence on the duplexers 110 and 120 or other circuits because the transmission signal is not yet amplified. Moreover, since the power amplifier IC 155 and the duplexers 110 and 120 are disposed adjacent to each other, the length of the signal wire transmitting the amplified transmission signal can be reduced. Accordingly, power loss and noise are minimized.
- the heat generated from the power amplifier IC can be dissipated to the circuit substrate 200 through the via conductors 243 and 244 and the core layer 210 even when the power amplifier IC 155 is disposed on the edge portion of the circuit substrate 200 .
- the RFIC 160 can be disposed in the region interior to the edge portion of the circuit substrate 200 . Accordingly, the arrangement of components or the design of circuit pattern, particularly at the vicinity of the RFIC 160 , is facilitated and the length of the signal wires can be reduced, thereby improving the high frequency characteristics of the high frequency circuit module 100 .
- the transmission signal transmitted from the RFIC 160 is inputted to the power amplifier IC 155 through the signal wire 180 disposed on the internal layer of the circuit substrate 200 in accordance with Embodiment 1, the transmission signal may be inputted to the power amplifier IC 155 through the signal wire 181 disposed on the circuit substrate 200 as shown in FIG. 5 .
- a high frequency circuit module according to Embodiment 2 of the present invention will now be described with reference to the accompanying drawings.
- the high frequency circuit module according to Embodiment 2 differs from the high frequency circuit module according to Embodiment 1 in the installation structures of the RFIC and the power amplifier IC.
- Other aspects such as the schematic circuit diagram of the high frequency circuit module, for example, are similar to that of Embodiment 1, and thus, mainly the difference between the embodiments will be described here.
- FIG. 6 is a top view of the high frequency circuit module 300 .
- FIG. 7 is a bottom view of the high frequency circuit module 300 .
- FIG. 8 is a cross-sectional view along the line A-A of FIG. 6 .
- the high frequency circuit module 300 includes a high frequency switch 101 and a first duplexer 110 mounted on a top surface of a circuit substrate 400 .
- the first duplexer 110 is an individual component in which a first transmission filter 112 and a first reception filter 114 are housed in a single package.
- a second duplexer 120 , an RFIC 160 and a power amplifier IC 155 are embedded in the circuit substrate 400 .
- the second duplexer 120 is an individual component in which a second transmission filter 122 and a second reception filter 124 are housed in a single embedded package.
- the circuit substrate 400 is a multilayered substrate including alternately stacked insulating layers and conductive layers. As shown in FIG. 8 , the circuit substrate 400 includes a core layer 410 , which is a conductive layer having high conductivity and made of a relatively thick metal, a plurality of insulating layers 421 and a plurality of conductive layers 422 disposed on a first main surface (top surface) of the core layer 410 , and a plurality of insulating layers 431 and a plurality of conductive layers 432 disposed on a second main surface (bottom surface) of the core layer 410 .
- the insulating layers 421 and 431 and the conductive layers 422 and 432 are disposed on the respective main surfaces of the core layer 410 according to the build-up technique.
- the core layer 410 serves as a ground conductor of a reference potential (ground).
- Conductive lands 401 or wires 402 are disposed on the first main surface (top surface) of the circuit substrate 400 for mounting components thereon.
- a plurality of terminal electrodes 405 are disposed on an edge portion of the second main surface (bottom surface) of the circuit substrate 400 .
- a plurality of ground electrodes 406 that are larger than the plurality of terminal electrodes 405 in area are disposed on a region of the second main surface (bottom surface) of circuit substrate 400 interior to the region where the plurality of terminal electrodes 405 are disposed.
- the high frequency switch 101 and the first duplexer 110 are soldered to the plurality of lands 401 .
- Penetrating holes 411 for housing components are formed in the core layer 410 .
- the RFIC 160 , the second duplexer 120 , and the power amplifier IC 155 are disposed.
- the thickness of the core layer 410 is preferably greater than the heights of the electronic components embedded therein and has a higher refractive index than the electronic components.
- the core layer 410 is made of a conductive material and is electrically grounded.
- the core layer 410 may be regarded as a conductive layer of the multilayered circuit substrate 400 in a broader sense.
- the core layer 410 is made from a metal plate, and more particularly, a metal plate formed of copper or a copper alloy.
- Terminal electrodes 160 a , 120 a and 155 a are disposed on bottom surfaces of the RFIC 160 , the second duplexer 120 , and the power amplifier IC 155 , respectively.
- the terminal electrodes 160 a , 120 a , and 155 a are connected to the conductive layers 432 through a via conductor 442 .
- the high frequency circuit module 300 is characterized in that the first duplexer 110 and the second duplexer 120 are disposed between the RFIC 160 and the power amplifier IC 155 as shown in FIGS. 6 and 7 .
- the length of a signal wire 170 for inputting a reception signal from the first duplexer 110 or the second duplexer 120 to the RFIC 160 can be reduced, and noise can be greatly suppressed from being mixed through the signal wire 170 .
- the reception signal outputted from the first duplexer 110 is inputted to the RFIC 160 through the signal wire 170 disposed on an internal layer of the circuit substrate 400 .
- the transmission signal outputted from the RFIC 160 is inputted to the power amplifier IC 155 through a signal wire 180 disposed on the internal layer of the circuit substrate 400 .
- the transmission signal amplified by the power amplifier IC 155 is inputted to the first duplexer 110 through a signal wire 185 disposed on the internal layer of the circuit substrate 400 .
- the signal wire 185 for transmitting the signal amplified by the power amplifier IC 155 is shorter than the signal wire 180 for transmitting the signal before amplification outputted from the RFIC 160 .
- the signal wires through which signals are inputted to and outputted from the second duplexer 120 are omitted for simplification.
- the RFIC 160 when viewed from the top of the circuit substrate 400 , at least a portion of the RFIC 160 overlaps the high frequency switch 101 in accordance with Embodiment 2. Further, a portion of the first duplexer 110 overlaps the second duplexer 120 . As described above, since components are arranged to overlap with each other, the density of components increases, thereby reducing the size of a high frequency circuit module. In addition, such structure enables the reduction in the length of various signal wires that connect the high frequency switch 101 , the duplexers 110 and 120 , the power amplifier IC 155 and the RFIC 160 . Thus, signal loss, noise penetration or the like can be suppressed.
- the power amplifier IC 155 when viewed from the top of the circuit substrate 400 , overlaps a portion of the ground electrodes 406 .
- a ground terminal 155 b that also serves as a heat-dissipating electrode of the power amplifier IC 155 is connected to the ground electrodes 406 disposed on the bottom surface of the circuit substrate 400 through a plurality of heat-dissipating via conductors 443 .
- the structure described above enables the conduction of the heat generated from the power amplifier IC 155 to the ground electrodes 406 through the via conductors 443 and to the circuit substrate 400 including the power amplifier IC 155 .
- the signal wire for inputting the reception signal from the duplexer 110 or 120 to the RFIC 160 need not be disposed near the power amplifier IC 155 .
- the length of the signal wire for inputting the reception signal from the duplexer 110 or 120 to the RFIC 160 can be reduced.
- Such structure facilitates the miniaturization and high density while preventing noise from entering the receiving circuit of the RFIC 160 .
- the transmission signal outputted from the RFIC 160 passes through the vicinity of the duplexers 110 and 120 to be inputted to the power amplifier IC 155 .
- the transmission signal has only a small influence on the duplexers 110 and 120 , other circuits, or the like because the transmission signal is not yet amplified. Moreover, since the power amplifier IC 155 and the duplexers 110 and 120 are disposed adjacent to one another, the length of the signal wire transmitting the amplified transmission signal can be reduced. Accordingly, power loss and noise are minimized.
- the power amplifier IC 155 is embedded in the circuit substrate 400 , and the distance between the heat-dissipating electrode 155 b of the power amplifier IC 155 and the ground electrodes 406 of the circuit substrate 400 can be reduced. Thus, the heat dissipation efficiency of the power amplifier IC 155 is improved.
- the present invention is not limited to the embodiments of the present invention described above.
- the RFIC 160 and the power amplifier IC 155 are mounted on the circuit substrate 200 in accordance with Embodiment 1
- both of the RFIC 160 and the power amplifier IC 155 are embedded in the circuit substrate 400 in accordance with Embodiment 2
- the RFIC 160 may be mounted on the circuit substrate and the power amplifier IC 155 may be embedded in the circuit substrate the circuit substrate.
- the RFIC 160 may be embedded in the circuit substrate and the power amplifier IC 155 may be mounted on the circuit substrate.
- the duplexers 110 and 120 or the high frequency switch 101 may be either mounted on or embedded in the circuit substrate.
- the structures of the signal wires installed among the RFIC 160 , the power amplifier IC 155 , and the duplexers 110 and 120 in accordance with the embodiments above are merely examples of the present invention.
- the signal wires may be disposed on or in the circuit substrate according to the specifications of the high frequency circuit module.
- the installation structures of the duplexers 110 and 120 are not limited to the embodiments in which the second duplexer 120 is embedded in the circuit substrate 200 such that the filters 122 and 124 thereof, which are individual components, are also embedded in the circuit substrate 200 in accordance with Embodiment 1, and the second duplexer 120 is embedded in the circuit substrate 400 such that the filters 122 and 124 thereof, which are individual components, are packaged in accordance with Embodiment 2.
- the number of amplifier circuits embedded in the power amplifier IC 155 or the number of the power amplifier ICs 155 is not limited.
- two power amplifier ICs corresponding to two high frequency power amplifiers 151 and 152 may be installed on the circuit substrate 200 .
- the two power amplifier ICs may be mounted on or embedded in the circuit substrate 200 .
- one of the two power amplifier ICs may be mounted on the circuit substrate 200 and the other power of the two amplifier ICs may be embedded in the circuit substrate 200 .
- the penetrating holes 211 and 411 are disposed in the respective core layers 210 and 410 and components such as filters, RFICs, and power amplifier ICs are disposed in the penetrating holes 211 and 411 .
- recessed portions may be formed in the core layers 210 and 410 instead of the penetrating holes 211 and 411 , and the components may be disposed in the recessed portions.
- the core layers 210 and 410 made of copper or a copper alloy are exemplified in the embodiments above, the materials of the core layers 210 and 410 are not limited to copper and a copper alloy.
- the core layers 210 and 410 may be made of other metals or alloys, resin, etc.
- the core layers 210 and 410 may or may not be conductive.
- the circuit substrates 200 and 400 include the core layers 210 and 410 that are relatively thick in accordance with the embodiments above, the circuit substrates 200 and 400 may be multilayered without the core layers 210 and 410 .
- circuit substrates 200 and 400 are mounted so as to be exposed on the top surfaces of the circuit substrates 200 and 400 in accordance with the embodiments above, but the circuit substrates 200 and 400 may be housed in a case or sealed with resin, so as to entirely or partially cover the top surfaces of the circuit substrates 200 and 400 .
Abstract
The high frequency circuit module includes an RFIC configured to transmit and receive a high frequency signal, a power amplifier IC configured to amplify a transmission signal outputted from the RFIC, and a duplexers configured to separate the transmission signal outputted from the power amplifier IC and inputted to an antenna and a reception signal from the antenna and inputted to the RFIC from each other, in which at least one of the RFIC and power amplifier IC is embedded in the circuit substrate, and the duplexers are disposed between the RFIC and the power amplifier IC.
Description
- This application claims the benefit of Japanese Application No. 2012-249160, filed in Japan on Nov. 13, 2012, which is hereby incorporated by reference in its entirety.
- 1. Field of the Invention
- The present invention relates to a high frequency circuit module in which a high frequency integrated circuit (IC), a power amplifier IC, and a duplexer are mounted on a circuit substrate, and more particularly, to an arrangement of components of a high frequency circuit module.
- 2. Description of Related Art
- Recently, multi-functional mobile phones having a small size, so-called smart phones, are being developed. In such mobile phones, a high frequency circuit module with a circuit substrate having thereon various components for transmitting and receiving a high frequency signal is mounted on a mother board (for example, see Patent Document 1). In a high frequency circuit module disclosed in
Patent Document 1, a high frequency integrated circuit (IC) configured to transmit and receive a high frequency signal, a power amplifier IC configured to amplify a transmission signal, a transmission filter, a reception filter, a high frequency switch, and the like are mounted on a circuit substrate. An output signal of the power amplifier IC passes through, in sequence, a transmission matching circuit, the transmission filter and the high frequency switch, and is then outputted through an antenna. A reception signal received through the antenna passes through, in sequence, the high frequency switch, the reception filter and a receiving matching circuit and is then inputted to the high frequency IC. Here, a signal wire for transmitting the transmission signal from the high frequency IC to the high frequency switch and a signal wire for transmitting the reception signal from the high frequency switch to the high frequency IC are disposed on the circuit substrate in a manner that these signal wires do not intersect with each other and are not adjacent to each other.Patent Document 2 discloses a multi-mode high frequency circuit in which a GSM-based circuit system unrelated to an operation of W-CDMA circuit system is disposed along a shortest path between the circuit system configured to handle a W-CDMA RF transmission signal and a receiving circuit configured to handle a W-CDMA RF reception signal capable of reducing signal interference between a W-CDMA transmission circuit and a W-CDMA receiving circuit. -
- Patent Document 1: Japanese Patent Application Laid-Open Publication No. 2005-198051
- Patent Document 2: Japanese Patent Application Laid-Open Publication No. 2006-340257
- However, conventional technology is not capable of properly meeting latest demands for smaller and more highly integrated mobile phones. In the high frequency circuit module disclosed in
Patent Document 1, the power amplifier IC is disposed immediately adjacent to the high frequency IC such that a signal wire for a reception signal passes through the vicinity of the power amplifier IC due to miniaturization and high density. Thus, noise or a leakage signal generated by the power amplifier IC is likely to enter into a receiving circuit of the high frequency IC. In the block for W-CDMA of a first communication technique disclosed inPatent Document 2, aduplexer 100 is distant from the high frequency IC 310 although a W-PA-IC 121 corresponding to the power amplifier IC is spaced apart from a high frequency IC 310. Thus, noise or a leakage signal generated by the power amplifier IC is mixed with a reception signal passing through theduplexer 100 in the receiving circuit of the high frequency IC. - The present invention is made in view of the above-mentioned situation, and an object thereof is to provide a high frequency circuit module having a high installation density.
- Additional or separate features and advantages of the invention will be set forth in the descriptions that follow and in part will be apparent from the description, or may be learned by practice of the invention. The objectives and other advantages of the invention will be realized and attained by the structure particularly pointed out in the written description and claims thereof as well as the appended drawings.
- To achieve these and other advantages and in accordance with the purpose of the present invention, as embodied and broadly described, in one aspect, a high frequency circuit module according to the present invention includes: a circuit substrate having alternately stacked insulating layers and conductive layers; a high frequency IC that is mounted on the circuit substrate and that performs transmission and reception of a high frequency signal; a power amplifier IC that is mounted on the circuit substrate and that amplifies a transmission signal from the high frequency IC; and a duplexer that separates the transmission signal outputted from the power amplifier IC to the antenna from a reception signal inputted from the antenna to the high frequency IC, wherein either one or both of the high frequency IC and the power amp IC is embedded in the circuit substrate and the duplexer is disposed between the high frequency IC and the power amp IC when viewing through the circuit substrate from the top.
- According to the present invention, a signal wire for inputting the reception signal from the duplexer to the high frequency IC need not be disposed near the power amplifier IC, and can be shortened. Such structure facilitates the miniaturization and high density while preventing noise from entering the receiving circuit of the high frequency IC. In addition, the transmission signal outputted from the high frequency IC passes through the vicinity of the duplexer to be inputted to the power amplifier IC. However, because the transmission signal has not been amplified yet, the transmission signal has only a small influence on the duplexer or other circuits. Since the power amplifier IC and the duplexer are disposed adjacent to each other, the length of the signal wire for transmitting the amplified transmission signal can be reduced. That is, the signal wire for transmitting the signal amplified by the power amplifier IC to the duplexer can be shorter than the signal wire for transmitting the signal before amplification outputted from the high frequency IC. Accordingly, power loss and noise may be minimized. In addition, the duplexer may be mounted on or embedded in the circuit substrate.
- In a preferred example of the present invention, a ground electrode is formed on a bottom surface of the circuit substrate, the power amplifier IC is embedded in the circuit substrate, and a heat dissipation electrode of the power amplifier IC is connected to the ground electrode on the bottom surface of the circuit substrate through the via conductor. According to the present invention, the distance between the heat-dissipating electrode of the power amplifier IC and the ground electrode disposed at a bottom surface of the circuit substrate may be minimized, thereby improving the heat dissipation efficiency.
- A preferred example of the present invention includes a core layer that is a conductive layer having a thickness greater than other conductive layers and that functions as a ground; a ground electrode disposed on a bottom surface, wherein one or both of the high frequency IC and the power amplifier IC is disposed in a penetrating hole or a recess formed in the core layer. According to the present invention, the shielding and heat dissipating properties of high frequency IC and the power amplifier IC are improved due to the core layer.
- A high frequency circuit module according to the present invention includes: a circuit substrate having alternately stacked insulating layers and conductive layers; and a power amplifier IC mounted on one surface of the circuit substrate, wherein the circuit substrate includes: a terminal electrode formed on another surface of the circuit substrate, in a region projected in the thickness direction of a region where the power amplifier IC is formed; a first via conductor for heat dissipation that connects the terminal of the power amplifier IC to a conductive layer in the circuit substrate; and a second via conductor for heat dissipation that connects the conductive layer to a ground electrode.
- According to the present invention, the heat generated in the power amplifier IC is transmitted by the first via conductor in the thickness direction of the circuit substrate, and is transmitted in the left and right direction along the conductive layer. The heat in the conductive layer is transmitted to the ground electrode of the circuit substrate through the second via conductor, and is dissipated to a mother circuit substrate in which the conductive layer is disposed. As a result, even if the power amplifier IC were disposed in the periphery of the circuit substrate, the heat generated by the power amplifier IC can be dissipated to the mother circuit substrate through the first via conductor and second via conductor for heat dissipation, and through the conductive layer.
- Also, a high frequency circuit module of the present invention includes: a circuit substrate having stacked insulating layers and conductive layers; a high frequency IC that is mounted on the circuit substrate and that performs transmission and reception of a high frequency signal; a power amplifier IC that is mounted on the circuit substrate and that amplifies a transmission signal from the high frequency IC; and a duplexer having a transmission filter that performs filtering on the transmission signal outputted from the power amplifier IC to the antenna, and a reception filter that performs filtering on a reception signal inputted from the antenna to the high frequency IC, wherein the transmission filter is disposed closer to the power amplifier IC than the reception filter is.
- According to the present invention, it is possible to make the signal line that transmits the transmission signal amplified by the power amplifier IC to the transmission filter of the duplexer short, and thus, it is possible to attain miniaturization and increased density while preventing noise in the reception circuit of the high frequency IC, and to decrease power loss and radiation of noise.
- As described above, according to the present invention, the signal wire for inputting the reception signal from a duplexer to the high frequency IC need not be disposed adjacent to the power amplifier IC. In addition, the length of the signal wire for inputting the reception signal from the duplexer to the high frequency IC can be reduced. Such structure facilitates the miniaturization and high density while preventing noise from entering the receiving circuit of the high frequency IC.
- It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory, and are intended to provide further explanation of the invention as claimed.
-
FIG. 1 is a circuit diagram schematically illustrating a high frequency circuit module according toEmbodiment 1 of the present invention. -
FIG. 2 is a top view of the high frequency circuit module according toEmbodiment 1 of the present invention. -
FIG. 3 is a bottom view of the high frequency circuit module according toEmbodiment 1 of the present invention. -
FIG. 4 is a cross-sectional view of the high frequency circuit module according toEmbodiment 1 of the present invention. -
FIG. 5 is a top view of a high frequency circuit module according to another example ofEmbodiment 1 of the present invention. -
FIG. 6 is a top view of a high frequency circuit module according toEmbodiment 2 of the present invention. -
FIG. 7 is a bottom view of the high frequency circuit module according toEmbodiment 2 of the present invention. -
FIG. 8 is a cross-sectional view of the high frequency circuit module according toEmbodiment 2 of the present invention. - A high frequency circuit module according to
Embodiment 1 of the present invention will now be described with reference to accompanying drawings.FIG. 1 is a circuit diagram schematically illustrating a high frequency circuit module. The description ofEmbodiment 1 will be focused on the main constitution of the present invention for simplification. - A high
frequency circuit module 100 according to Embodiment 1 is preferably used in mobile phones employing two frequency bands. As shown inFIG. 1 , the highfrequency circuit module 100 includes ahigh frequency switch 101, afirst duplexer 110, asecond duplexer 120, high frequencytransmission power amplifiers frequency circuit module 100 includes a matching circuit, a band pass filter for a transmission signal, and the like for each of frequency bands when implemented as an actual circuit, they are omitted in the present embodiment for simplification. - The
high frequency switch 101 switches between a connection between thefirst duplexer 110 and anexternal antenna 10 and a connection between thesecond duplexer 120 and theexternal antenna 10. - The
first duplexer 110 includes atransmission filter 112 and areception filter 114, and thesecond duplexer 120 includes atransmission filter 122 and areception filter 124. Various filters such as a surface acoustic wave (SAW) filter and a bulk acoustic wave (BAW) filter may be used as the transmission filters 112 and 122 and the reception filters 114 and 124. InEmbodiment 1, the SAW filter is used. The transmission filters 112 and 122 are connected to a transmission port of theRFIC 160 through the highfrequency power amplifiers RFIC 160. The highfrequency power amplifiers power amplifier IC 155. TheRFIC 160 performs transmission processing and reception processing such as modulation/demodulation or multiplexing on a high frequency signal. - Next, the structure of the high
frequency circuit module 100 will be described with reference toFIGS. 2 to 4 .FIG. 2 is a top view of the highfrequency circuit module 100.FIG. 3 is a bottom view of the highfrequency circuit module 100.FIG. 4 is a cross-sectional view along line A-A ofFIG. 2 . - As shown in
FIG. 2 , theRFIC 160, thefirst duplexer 110, thepower amplifier IC 155 and thehigh frequency switch 101 are mounted on a top surface of acircuit substrate 200 in the highfrequency circuit module 100. Thefirst transmission filter 112 and thefirst reception filter 114 are housed in one surface-mount package to constitute thefirst duplexer 110. Thesecond duplexer 120 is embedded in thecircuit substrate 200. Here, thesecond duplexer 120 has a structure in which elements thereof (thetransmission filter 122, thereception filter 124, etc.) are individually embedded in thecircuit substrate 200. That is, the elements of thesecond duplexer 120 are not housed in a single package contrary to thefirst duplexer 110. - The
circuit substrate 200 is multilayered and includes alternately stacked insulating layers and conductive layers. As shown inFIG. 4 , thecircuit substrate 200 includes acore layer 210, which is a conductive layer having high conductivity and made of a relatively thick metal, a plurality of insulatinglayers 221 and a plurality ofconductive layers 222 that are disposed on a first main surface, i.e., a top surface, of thecore layer 210 and a plurality of insulatinglayers 231 and a plurality ofconductive layers 232 that are disposed on a second main surface, i.e., a bottom surface, of thecore layer 210. The insulatinglayers conductive layers core layer 210 according to a build-up technique. Here, two layers among theconductive layers 222 disposed between the first main surface (top surface) of thecore layer 210 and the first main surface (top surface) of thecircuit substrate 200 and one layer among theconductive layers 232 disposed between the second main surface (bottom surface) of thecore layer 210 and the second main surface (top surface) of thecircuit substrate 200 serve as groundconductive layers conductive layers conductive layers core layer 210, and connected to thecore layer 210 through a viaconductor 241. Thus, thecore layer 210 may also serve as a ground conductor. In addition, theconductive layer 222 is disposed between the two groundconductive layers conductive layer 222 to serve as a strip line.Conductive lands 201 orwires 202 are disposed on the first main surface (top surface) of thecircuit substrate 200 for mounting components thereon. In addition, a plurality ofterminal electrodes 205 are disposed on an edge portion of the second main surface (bottom surface) of thecircuit substrate 200. A plurality ofground electrodes 206 that are larger than the plurality ofterminal electrodes 205 in area are disposed on a region of the second main surface (bottom surface) ofcircuit substrate 200 interior to the region where the plurality ofterminal electrodes 205 are disposed. TheRFIC 160, thefirst duplexer 110 and thepower amplifier IC 155 are soldered to the plurality oflands 201. - Penetrating
holes 211 for housing components are formed in thecore layer 210. In the penetratingholes 211, thesecond transmission filter 122 and thesecond reception filter 124 of thesecond duplexer 120 are disposed. Thus, thecore layer 210 is preferably thicker than the components embedded therein. In the present embodiment, thecore layer 210 is made of a metal plate, and more particularly, a metal plate made of copper or a copper alloy. Spaces between the components housed in the penetratingholes 211 are filled with an insulator such as a resin, such that the insulatinglayer Terminal electrodes second transmission filter 122 and a top surface of thesecond reception filter 124, respectively. Theterminal electrodes conductive layers 222 through a viaconductor 242. - The high
frequency circuit module 100 according to the present invention is characterized in that thefirst duplexer 110 and the second duplexer 120 (i.e., thesecond transmission filter 122 and the second reception filter 124) are disposed between theRFIC 160 and thepower amplifier IC 155 as shown inFIG. 2 . Thus, a length of asignal wire 170 for inputting a reception signal from thefirst duplexer 110 or thesecond duplexer 120 to theRFIC 160 can be reduced, and noise can be greatly suppressed from entering thesignal wire 170. As shown inFIG. 2 , the reception signal received from thefirst duplexer 110 is inputted to theRFIC 160 through thesignal wire 170 disposed on the top surface of thecircuit substrate 200. The transmission signal outputted from theRFIC 160 is inputted to thepower amplifier IC 155 through asignal wire 180 disposed on an internal layer of thecircuit substrate 200, and more particularly, on theconductive layers 222 interposed between the two groundconductive layers first duplexer 110 through asignal wire 185 disposed on the top surface of thecircuit substrate 200. Here, thesignal wire 185 for transmitting the signal amplified by the power amplifier IC is shorter than thesignal wire 180 for transmitting a signal before amplification outputted from theRFIC 160. In addition, inFIG. 2 , signal wires through which signals are inputted to and outputted from thesecond duplexer 120 are omitted for simplification. - The high
frequency circuit module 100 according to the present invention is also characterized in that thepower amplifier IC 155 is installed at the edge portion of thecircuit substrate 200 as shown inFIGS. 2 and 3 . As shown inFIG. 3 , when viewed from the top of thecircuit substrate 200, thepower amplifier IC 155 overlaps a portion of theterminal electrodes 205. In addition, as shown inFIG. 4 , aground terminal 155 a of thepower amplifier IC 155 is mounted on thelands 201 of thecircuit substrate 200, and thelands 201 are connected to thecore layer 210 through a plurality of viaconductors 243 for heat dissipation. In addition, thecore layer 210 is connected to theground electrodes 206 below thecore layer 210 through a plurality ofconductors 244 for heat dissipation. In the structure described above, the heat generated from thepower amplifier IC 155 is conducted in the vertical direction of thecircuit substrate 200 through the viaconductors 243 and along thecore layer 210 in the horizontal direction. The heat generated from thecore layer 210 is conducted to theground electrodes 206 through theconductors 244, and dissipated to thecircuit substrate 200 where thecore layer 210 is disposed. - In the high
frequency circuit module 100 described above, since theduplexers RFIC 160 and thepower amplifier IC 155, the signal wire for inputting the reception signal from theduplexer RFIC 160 need not be located near thepower amplifier IC 155. In addition, the length of the signal wire for inputting the reception signal from theduplexer RFIC 160 can be reduced. Such structure facilitates the miniaturization and high density while preventing noise from entering the receiving circuit of theRFIC 160. In addition, the transmission signal outputted from theRFIC 160 passes through the vicinity of theduplexers power amplifier IC 155. However, the transmission signal has only a small influence on theduplexers power amplifier IC 155 and theduplexers - In addition, in the high
frequency circuit module 100 according to the present embodiment, the heat generated from the power amplifier IC can be dissipated to thecircuit substrate 200 through the viaconductors core layer 210 even when thepower amplifier IC 155 is disposed on the edge portion of thecircuit substrate 200. Thus, theRFIC 160 can be disposed in the region interior to the edge portion of thecircuit substrate 200. Accordingly, the arrangement of components or the design of circuit pattern, particularly at the vicinity of theRFIC 160, is facilitated and the length of the signal wires can be reduced, thereby improving the high frequency characteristics of the highfrequency circuit module 100. - While the transmission signal transmitted from the
RFIC 160 is inputted to thepower amplifier IC 155 through thesignal wire 180 disposed on the internal layer of thecircuit substrate 200 in accordance withEmbodiment 1, the transmission signal may be inputted to thepower amplifier IC 155 through the signal wire 181 disposed on thecircuit substrate 200 as shown inFIG. 5 . - A high frequency circuit module according to
Embodiment 2 of the present invention will now be described with reference to the accompanying drawings. The high frequency circuit module according toEmbodiment 2 differs from the high frequency circuit module according toEmbodiment 1 in the installation structures of the RFIC and the power amplifier IC. Other aspects such as the schematic circuit diagram of the high frequency circuit module, for example, are similar to that ofEmbodiment 1, and thus, mainly the difference between the embodiments will be described here. - The structure of a high
frequency circuit module 300 according toEmbodiment 2 will now be described with reference toFIGS. 6 to 8 .FIG. 6 is a top view of the highfrequency circuit module 300.FIG. 7 is a bottom view of the highfrequency circuit module 300.FIG. 8 is a cross-sectional view along the line A-A ofFIG. 6 . - As shown in
FIG. 6 , in the highfrequency circuit module 300 includes ahigh frequency switch 101 and afirst duplexer 110 mounted on a top surface of acircuit substrate 400. Thefirst duplexer 110 is an individual component in which afirst transmission filter 112 and afirst reception filter 114 are housed in a single package. Asecond duplexer 120, anRFIC 160 and apower amplifier IC 155 are embedded in thecircuit substrate 400. Thesecond duplexer 120 is an individual component in which asecond transmission filter 122 and asecond reception filter 124 are housed in a single embedded package. - The
circuit substrate 400 is a multilayered substrate including alternately stacked insulating layers and conductive layers. As shown inFIG. 8 , thecircuit substrate 400 includes acore layer 410, which is a conductive layer having high conductivity and made of a relatively thick metal, a plurality of insulatinglayers 421 and a plurality ofconductive layers 422 disposed on a first main surface (top surface) of thecore layer 410, and a plurality of insulatinglayers 431 and a plurality ofconductive layers 432 disposed on a second main surface (bottom surface) of thecore layer 410. The insulatinglayers conductive layers core layer 410 according to the build-up technique. Here, thecore layer 410 serves as a ground conductor of a reference potential (ground).Conductive lands 401 orwires 402 are disposed on the first main surface (top surface) of thecircuit substrate 400 for mounting components thereon. In addition, a plurality ofterminal electrodes 405 are disposed on an edge portion of the second main surface (bottom surface) of thecircuit substrate 400. A plurality ofground electrodes 406 that are larger than the plurality ofterminal electrodes 405 in area are disposed on a region of the second main surface (bottom surface) ofcircuit substrate 400 interior to the region where the plurality ofterminal electrodes 405 are disposed. Thehigh frequency switch 101 and thefirst duplexer 110 are soldered to the plurality oflands 401. - Penetrating
holes 411 for housing components are formed in thecore layer 410. In the penetratingholes 411, theRFIC 160, thesecond duplexer 120, and thepower amplifier IC 155 are disposed. Thus, the thickness of thecore layer 410 is preferably greater than the heights of the electronic components embedded therein and has a higher refractive index than the electronic components. In addition, thecore layer 410 is made of a conductive material and is electrically grounded. Thus, thecore layer 410 may be regarded as a conductive layer of themultilayered circuit substrate 400 in a broader sense. InEmbodiment 2, thecore layer 410 is made from a metal plate, and more particularly, a metal plate formed of copper or a copper alloy. Spaces between the components housed in the penetratingholes 411 are filled with an insulator such as a resin, such that the insulatinglayers Terminal electrodes RFIC 160, thesecond duplexer 120, and thepower amplifier IC 155, respectively. Theterminal electrodes conductive layers 432 through a viaconductor 442. - Similar to the high
frequency circuit module 100 according toEmbodiment 1, the highfrequency circuit module 300 is characterized in that thefirst duplexer 110 and thesecond duplexer 120 are disposed between theRFIC 160 and thepower amplifier IC 155 as shown inFIGS. 6 and 7 . Thus, the length of asignal wire 170 for inputting a reception signal from thefirst duplexer 110 or thesecond duplexer 120 to theRFIC 160 can be reduced, and noise can be greatly suppressed from being mixed through thesignal wire 170. As shown inFIG. 6 the reception signal outputted from thefirst duplexer 110 is inputted to theRFIC 160 through thesignal wire 170 disposed on an internal layer of thecircuit substrate 400. The transmission signal outputted from theRFIC 160 is inputted to thepower amplifier IC 155 through asignal wire 180 disposed on the internal layer of thecircuit substrate 400. The transmission signal amplified by thepower amplifier IC 155 is inputted to thefirst duplexer 110 through asignal wire 185 disposed on the internal layer of thecircuit substrate 400. Thesignal wire 185 for transmitting the signal amplified by thepower amplifier IC 155 is shorter than thesignal wire 180 for transmitting the signal before amplification outputted from theRFIC 160. InFIG. 6 , the signal wires through which signals are inputted to and outputted from thesecond duplexer 120 are omitted for simplification. - In addition, as shown in
FIGS. 6 and 7 , when viewed from the top of thecircuit substrate 400, at least a portion of theRFIC 160 overlaps thehigh frequency switch 101 in accordance withEmbodiment 2. Further, a portion of thefirst duplexer 110 overlaps thesecond duplexer 120. As described above, since components are arranged to overlap with each other, the density of components increases, thereby reducing the size of a high frequency circuit module. In addition, such structure enables the reduction in the length of various signal wires that connect thehigh frequency switch 101, theduplexers power amplifier IC 155 and theRFIC 160. Thus, signal loss, noise penetration or the like can be suppressed. - As shown in
FIG. 7 , when viewed from the top of thecircuit substrate 400, thepower amplifier IC 155 overlaps a portion of theground electrodes 406. In addition, as shown inFIG. 8 , aground terminal 155 b that also serves as a heat-dissipating electrode of thepower amplifier IC 155 is connected to theground electrodes 406 disposed on the bottom surface of thecircuit substrate 400 through a plurality of heat-dissipating viaconductors 443. The structure described above enables the conduction of the heat generated from thepower amplifier IC 155 to theground electrodes 406 through the viaconductors 443 and to thecircuit substrate 400 including thepower amplifier IC 155. - In the high
frequency circuit module 300 described above, since theduplexers RFIC 160 and thepower amplifier IC 155, the signal wire for inputting the reception signal from theduplexer RFIC 160 need not be disposed near thepower amplifier IC 155. In addition, the length of the signal wire for inputting the reception signal from theduplexer RFIC 160 can be reduced. Such structure facilitates the miniaturization and high density while preventing noise from entering the receiving circuit of theRFIC 160. In addition, the transmission signal outputted from theRFIC 160 passes through the vicinity of theduplexers power amplifier IC 155. However, the transmission signal has only a small influence on theduplexers power amplifier IC 155 and theduplexers - In addition, in the high
frequency circuit module 300 according toEmbodiment 2, thepower amplifier IC 155 is embedded in thecircuit substrate 400, and the distance between the heat-dissipatingelectrode 155 b of thepower amplifier IC 155 and theground electrodes 406 of thecircuit substrate 400 can be reduced. Thus, the heat dissipation efficiency of thepower amplifier IC 155 is improved. - The present invention is not limited to the embodiments of the present invention described above. For example, while both of the
RFIC 160 and thepower amplifier IC 155 are mounted on thecircuit substrate 200 in accordance withEmbodiment 1, and both of theRFIC 160 and thepower amplifier IC 155 are embedded in thecircuit substrate 400 in accordance withEmbodiment 2, theRFIC 160 may be mounted on the circuit substrate and thepower amplifier IC 155 may be embedded in the circuit substrate the circuit substrate. Alternatively, theRFIC 160 may be embedded in the circuit substrate and thepower amplifier IC 155 may be mounted on the circuit substrate. In addition, in the respective embodiments, theduplexers high frequency switch 101 may be either mounted on or embedded in the circuit substrate. - In addition, the structures of the signal wires installed among the
RFIC 160, thepower amplifier IC 155, and theduplexers - Moreover, the installation structures of the
duplexers second duplexer 120 is embedded in thecircuit substrate 200 such that thefilters circuit substrate 200 in accordance withEmbodiment 1, and thesecond duplexer 120 is embedded in thecircuit substrate 400 such that thefilters Embodiment 2. - While one
power amplifier IC 155 in which the two highfrequency power amplifiers power amplifier IC 155 or the number of thepower amplifier ICs 155 is not limited. In another example of mounting the circuit shown inFIG. 1 , two power amplifier ICs corresponding to two highfrequency power amplifiers circuit substrate 200. In this case, the two power amplifier ICs may be mounted on or embedded in thecircuit substrate 200. Moreover, one of the two power amplifier ICs may be mounted on thecircuit substrate 200 and the other power of the two amplifier ICs may be embedded in thecircuit substrate 200. - In the embodiments above, the penetrating
holes holes holes - In addition, while the core layers 210 and 410 made of copper or a copper alloy are exemplified in the embodiments above, the materials of the core layers 210 and 410 are not limited to copper and a copper alloy. For example, the core layers 210 and 410 may be made of other metals or alloys, resin, etc. In addition, the core layers 210 and 410 may or may not be conductive. Further, while the
circuit substrates circuit substrates - Furthermore, various components are mounted so as to be exposed on the top surfaces of the
circuit substrates circuit substrates circuit substrates - It will be apparent to those skilled in the art that various modifications and variations can be made in the present invention without departing from the spirit or scope of the invention. Thus, it is intended that the present invention cover modifications and variations that come within the scope of the appended claims and their equivalents. In particular, it is explicitly contemplated that any part or whole of any two or more of the embodiments and their modifications described above can be combined and regarded within the scope of the present invention.
Claims (7)
1. A high frequency circuit module, comprising:
a circuit substrate having stacked insulating layers and conductive layers;
a high frequency IC that is mounted on the circuit substrate and that performs transmission and reception of a high frequency signal;
a power amplifier IC that is mounted on the circuit substrate and that amplifies a transmission signal from the high frequency IC; and
a duplexer having a transmission filter that performs filtering on an amplified transmission signal outputted from the power amplifier IC to the antenna, and a reception filter that performs filtering on a reception signal inputted from the antenna to the high frequency IC,
wherein the transmission filter is disposed closer to the power amplifier IC than the reception filter is.
2. The high frequency circuit module according to claim 1 , wherein the circuit substrate includes: a core layer that is a conductive layer having a thickness greater than other conductive layers and that functions as a ground; a ground electrode disposed on a bottom surface of the circuit substrate; a first via conductor for heat dissipation that connects a lower surface of the power amplifier IC to the core layer; and a second via conductor for heat dissipation that connects the ground electrode to the core layer.
3. The high frequency circuit module according to claim 1 , wherein the duplexer is embedded in the circuit substrate.
4. The high frequency circuit module according to claim 2 , wherein the duplexer is embedded in the circuit substrate.
5-6. (canceled)
7. The high frequency circuit module according to claim 1 , wherein the duplexer is mounted on the circuit substrate.
8. The high frequency circuit module according to claim 2 , wherein the duplexer is mounted on the circuit substrate.
Priority Applications (1)
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US14/453,345 US20140347145A1 (en) | 2012-08-21 | 2014-08-06 | High frequency circuit module |
Applications Claiming Priority (5)
Application Number | Priority Date | Filing Date | Title |
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JP2012182286A JP5117632B1 (en) | 2012-08-21 | 2012-08-21 | High frequency circuit module |
JP2012-249160 | 2012-11-13 | ||
JP2012249160A JP5285806B1 (en) | 2012-08-21 | 2012-11-13 | High frequency circuit module |
US14/077,697 US8830010B2 (en) | 2012-08-21 | 2013-11-12 | High frequency circuit module with a filter in a core layer of a circuit substrate |
US14/453,345 US20140347145A1 (en) | 2012-08-21 | 2014-08-06 | High frequency circuit module |
Related Parent Applications (1)
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US14/077,697 Continuation US8830010B2 (en) | 2012-08-21 | 2013-11-12 | High frequency circuit module with a filter in a core layer of a circuit substrate |
Publications (1)
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US20140347145A1 true US20140347145A1 (en) | 2014-11-27 |
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US13/952,509 Active 2034-03-28 US9099979B2 (en) | 2012-08-21 | 2013-07-26 | High-frequency circuit module |
US14/077,697 Expired - Fee Related US8830010B2 (en) | 2012-08-21 | 2013-11-12 | High frequency circuit module with a filter in a core layer of a circuit substrate |
US14/150,599 Active US8872600B2 (en) | 2012-08-21 | 2014-01-08 | High frequency circuit module with a filter disposed in a core layer of a circuit substrate |
US14/453,345 Abandoned US20140347145A1 (en) | 2012-08-21 | 2014-08-06 | High frequency circuit module |
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US13/952,509 Active 2034-03-28 US9099979B2 (en) | 2012-08-21 | 2013-07-26 | High-frequency circuit module |
US14/077,697 Expired - Fee Related US8830010B2 (en) | 2012-08-21 | 2013-11-12 | High frequency circuit module with a filter in a core layer of a circuit substrate |
US14/150,599 Active US8872600B2 (en) | 2012-08-21 | 2014-01-08 | High frequency circuit module with a filter disposed in a core layer of a circuit substrate |
Country Status (5)
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US (4) | US9099979B2 (en) |
JP (1) | JP5285806B1 (en) |
KR (1) | KR101445543B1 (en) |
CN (1) | CN103635021B (en) |
TW (1) | TWI493893B (en) |
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Also Published As
Publication number | Publication date |
---|---|
US8830010B2 (en) | 2014-09-09 |
KR101445543B1 (en) | 2014-09-29 |
US20140133103A1 (en) | 2014-05-15 |
CN103635021A (en) | 2014-03-12 |
CN103635021B (en) | 2016-09-07 |
US9099979B2 (en) | 2015-08-04 |
JP5285806B1 (en) | 2013-09-11 |
US20140055956A1 (en) | 2014-02-27 |
KR20140024802A (en) | 2014-03-03 |
US20140132365A1 (en) | 2014-05-15 |
JP2014099683A (en) | 2014-05-29 |
TW201412036A (en) | 2014-03-16 |
TWI493893B (en) | 2015-07-21 |
US8872600B2 (en) | 2014-10-28 |
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