WO2014002758A1 - 伝送線路 - Google Patents
伝送線路 Download PDFInfo
- Publication number
- WO2014002758A1 WO2014002758A1 PCT/JP2013/066147 JP2013066147W WO2014002758A1 WO 2014002758 A1 WO2014002758 A1 WO 2014002758A1 JP 2013066147 W JP2013066147 W JP 2013066147W WO 2014002758 A1 WO2014002758 A1 WO 2014002758A1
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- WIPO (PCT)
- Prior art keywords
- conductor
- dielectric
- main surface
- transmission line
- film
- Prior art date
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Classifications
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01P—WAVEGUIDES; RESONATORS, LINES, OR OTHER DEVICES OF THE WAVEGUIDE TYPE
- H01P3/00—Waveguides; Transmission lines of the waveguide type
- H01P3/02—Waveguides; Transmission lines of the waveguide type with two longitudinal conductors
- H01P3/08—Microstrips; Strip lines
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01P—WAVEGUIDES; RESONATORS, LINES, OR OTHER DEVICES OF THE WAVEGUIDE TYPE
- H01P3/00—Waveguides; Transmission lines of the waveguide type
- H01P3/02—Waveguides; Transmission lines of the waveguide type with two longitudinal conductors
- H01P3/06—Coaxial lines
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B1/00—Conductors or conductive bodies characterised by the conductive materials; Selection of materials as conductors
- H01B1/02—Conductors or conductive bodies characterised by the conductive materials; Selection of materials as conductors mainly consisting of metals or alloys
- H01B1/026—Alloys based on copper
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B3/00—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties
- H01B3/18—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties mainly consisting of organic substances
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B7/00—Insulated conductors or cables characterised by their form
- H01B7/02—Disposition of insulation
- H01B7/0275—Disposition of insulation comprising one or more extruded layers of insulation
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01P—WAVEGUIDES; RESONATORS, LINES, OR OTHER DEVICES OF THE WAVEGUIDE TYPE
- H01P1/00—Auxiliary devices
- H01P1/04—Fixed joints
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01P—WAVEGUIDES; RESONATORS, LINES, OR OTHER DEVICES OF THE WAVEGUIDE TYPE
- H01P3/00—Waveguides; Transmission lines of the waveguide type
- H01P3/02—Waveguides; Transmission lines of the waveguide type with two longitudinal conductors
- H01P3/08—Microstrips; Strip lines
- H01P3/085—Triplate lines
Definitions
- the present invention relates to a transmission line, and more particularly to a transmission line for transmitting a high-frequency signal.
- a coaxial cable is typically used as a transmission line for transmitting high-frequency signals by connecting high-frequency circuits and high-frequency elements to each other.
- This coaxial cable is composed of a central conductor for transmitting a high-frequency signal and a shield conductor provided concentrically around the central conductor.
- the coaxial cable is used in various high-frequency devices because of its excellent shielding performance and low cost. .
- portable devices become smaller and thinner, there is a need for thinner cables built into the devices.
- Patent Document 1 proposes a triplate type transmission line that is thinner than a coaxial cable and suitable for incorporation in a portable device.
- a flexible resin base material for the transmission line having such a configuration the vertical flexibility is improved, and the transmission line can be arranged in a thin gap along the curved surface in the casing of the portable terminal. .
- Patent Document 1 since the upper and lower ground conductors are connected by via-hole conductors, there is a problem that the burden on the production of the transmission line is large.
- the ground conductor is usually made by joining different materials such as copper foil and conductive paste.
- the transmission line is bent and used, if there is a via near the bent portion, stress may be applied to the interface between the via and the copper foil, and the via may be broken due to breakage.
- the via is too close to the side surface of the base material, the base material may be cracked due to stress when cutting and separating the aggregate base material, so it is necessary to provide a certain margin from the side to the inside is there. For this reason, the burden on production of a transmission line becomes large, for example, the width of the line has to be increased more than required by the characteristics.
- a main object of the present invention is to provide a transmission line that can suppress a burden on manufacturing.
- the transmission line according to the present invention includes a signal line conductor extending in the signal propagation direction, a signal line conductor extending in the signal propagation direction so as to embed the signal line conductor, one main surface and the other main surface facing the one main surface, one main surface and the other
- a dielectric element body having a side surface continuous with the main surface, and when viewed in plan, a one-side main body of the dielectric element body is formed so that a conductor non-formation portion overlapping the signal line conductor is formed along the signal line conductor.
- a transmission line including a ground conductor disposed on the surface and a bridge conductor disposed on one main surface of the dielectric body so as to straddle the conductor non-forming portion and to be electrically connected to the ground conductor.
- the bridge conductor is formed on a film wound around the dielectric body.
- the ground conductor is formed on a film wound around a dielectric body.
- the bridge conductor and the ground conductor are formed on the same film.
- the ground conductor is formed on the first film wound around the dielectric body, and the bridge conductor is formed on the second film wound on the first film.
- the length of the bridge conductor is longer than the length of the outer periphery of the dielectric body.
- the film has heat shrinkability.
- the transmission line according to the present invention includes a signal line conductor extending in the signal propagation direction, a signal line conductor extending in the signal propagation direction so as to embed the signal line conductor, one main surface and the other main surface facing the one main surface, one main surface and the other
- a dielectric element body having a side surface continuous with the main surface, and when viewed in plan, a one-side main body of the dielectric element body is formed so that a conductor non-formation portion overlapping the signal line conductor is formed along the signal line conductor.
- a transmission line including a ground conductor disposed on the surface and a bridge conductor disposed on one main surface of the dielectric body so as to straddle the conductor non-forming portion and to be electrically connected to the ground conductor.
- the bridge conductor is formed by winding a linear conductor around a dielectric body.
- the bridge conductor is wound around the dielectric body so as to be spiral with the signal propagation direction as the winding axis.
- FIG. 1 It is a perspective view which shows the transmission member applied to one Example of this invention. It is a perspective view which shows an example of the film member wound around the transmission member shown in FIG. It is a perspective view which shows an example of the other film member wound around the transmission member shown in FIG. It is a perspective view which shows the state which wound the film member shown in FIG. 2 around the transmission member shown in FIG. It is a perspective view which shows the high frequency transmission line completed by further winding the film member shown in FIG. It is an illustration figure which shows the cross section orthogonal to the X-axis of the high frequency transmission line shown in FIG. It is a perspective view which shows an example of the state which attached the connector to the both ends of the high frequency transmission line shown in FIG.
- FIG. 1 It is an illustration figure which shows the cross section orthogonal to the Y-axis of the connector attachment part shown in FIG. It is a perspective view which shows the transmission member applied to another Example. It is a perspective view which shows an example of the film member wound around the transmission member shown in FIG. It is a perspective view which shows the high frequency transmission line completed by winding the film member shown in FIG. It is an illustration figure which shows the cross section orthogonal to the X-axis of the high frequency transmission line shown in FIG. It is a perspective view which shows the state which wound the insulating protective layer around the high frequency transmission line shown in FIG. It is a perspective view which shows the transmission member applied to another Example. It is a perspective view which shows an example of the film member wound around the transmission member shown in FIG.
- FIG. It is a perspective view which shows the high frequency transmission line completed by winding the film member shown in FIG. It is a perspective view which shows the state which wound the insulating protective layer around the high frequency transmission line shown in FIG. Furthermore, it is a perspective view which shows the transmission member applied to another Example. It is a perspective view which shows the state which formed the ground layer in the transmission member shown in FIG. It is a perspective view which shows the high frequency transmission line completed by winding a strip
- (A) is sectional drawing which shows the state which shifted the position of the signal line conductor which appeared in the cross section shown in FIG. 6 to the Z-axis direction
- (B) is the electroconductivity formed in the corner
- a transmission member 10 of this embodiment includes a dielectric 12 formed in a prismatic shape by a dielectric material such as Teflon (registered trademark), PET, polyimide or the like.
- the dielectric 12 is integrally formed by extruding a single material.
- the length of the dielectric 12 extends along the X axis, the width of the dielectric 12 extends along the Y axis, and the thickness of the dielectric 12 extends along the Z axis. The length is arbitrarily adjusted, and the width and thickness are adjusted to a uniform size over the entire length.
- a dielectric 12 is embedded with a signal line conductor 14 extending along the X axis.
- the signal line conductor 14 is made of a metal material whose main component is silver or copper and has a small specific resistance, and is embedded in the center of the cross section of the dielectric 12 that is orthogonal to the X-axis direction.
- the high frequency signal propagates through the signal line conductor 14 in the X-axis direction.
- a film member 16 is made of a dielectric film 20 formed of a dielectric and heat-shrinkable material such as Teflon (registered trademark), PET, polyimide, etc., and an aluminum foil as a dielectric.
- the conductive film 18a to 18e printed on the main surface of the film 20 is formed.
- the main surface of the dielectric film 20 is rectangular, and the length, width and thickness of the rectangle extend along the X, Y and Z axes.
- the length of the dielectric film 20 substantially matches the length of the dielectric 12, and the width of the dielectric film 20 substantially matches the length of the outer periphery of the dielectric 12 in the direction around the X axis.
- the lengths of the conductive films 18a to 18e are almost the same as the length of the dielectric film 20.
- the width of each of the conductive films 18a and 18e is slightly smaller than 1 ⁇ 2 of the width of the dielectric 12
- the width of each of the conductive films 18b and 18d is slightly smaller than the thickness of the dielectric 12
- the conductive The width of the film 18 c is slightly smaller than the width of the dielectric 12.
- the conductive films 18a to 18e are printed on the lower surface of the dielectric film 20 (main surface facing the negative side in the Z-axis direction) so as to be arranged in this order and in a non-contact manner toward the negative side in the Y-axis direction. Is done.
- film member 22 is made of a dielectric film 24 formed of a dielectric and heat-shrinkable material such as Teflon (registered trademark), PET, polyimide, and the like, and an aluminum foil as a dielectric.
- a plurality of conductive films 26, 26,... Printed on the main surface of the film 24 are formed.
- the main surface of the dielectric film 24 is also rectangular, and the length, width, and thickness of the rectangle also extend along the X, Y, and Z axes.
- the length of the dielectric film 24 substantially matches the length of the dielectric 12
- the width of the dielectric film 24 substantially matches the length of the outer periphery of the dielectric 12 in the direction around the X axis.
- Each of the conductive films 26, 26,... Is formed so that the main surface is rectangular.
- the length of the rectangle is slightly shorter than the width of the dielectric film 24.
- the conductive films 26, 26,... Extend in the Y-axis and are arranged at equal intervals in the X-axis direction, with the lower surface of the dielectric film 24 (mainly facing the negative side in the Z-axis direction). Printed on the surface).
- the film member 16 shown in FIG. 2 is wound around the transmission member 10 in the manner shown in FIG. Specifically, the film member 16 is wound around the X axis with the lower surface of the dielectric film 20 facing the main surface or side surface of the transmission member 10.
- the main surfaces of the conductive films 18a and 18e are exposed on the positive side in the Z-axis direction
- the main surface of the conductive film 18b is exposed on the positive side in the Y-axis direction
- the main surface of the conductive film 18c is in the Y-axis direction.
- the main surface of the conductive film 18d is exposed on the negative side in the Y-axis direction.
- the conductive films 18a to 18e attached to the transmission member 10 function as ground conductors.
- the conductive films 18a to 18e form a triplate structure together with the signal line conductor 14, and a slit extending along the X axis is provided between the conductive films 18a and 18e.
- the film member 22 shown in FIG. 3 is wound around the outer side of the film member 16 wound as shown in FIG. 4 as shown in FIGS. Specifically, the film member is wound around the X axis with the lower surface of the dielectric film 22 facing the conductive films 18a to 18e.
- each of the conductive films 26, 26,... Is in contact with the conductive films 18a to 18e. That is, the conductive films 26, 26,... Function as bridge conductors.
- the conductive films 18a to 18e are electrically connected at equal intervals in the X-axis direction, and the ground potential is stabilized. In other words, it is possible to suppress a large standing wave from being generated between both ends of the slit in the X-axis direction and the occurrence of unnecessary radiation to the outside due to this standing wave.
- the high-frequency transmission line 30 thus produced is used to connect a high-frequency device such as an antenna element and a high-frequency device such as an RF circuit in a high-frequency device such as a mobile communication terminal.
- a coaxial connector 32 is attached to both ends in the length direction of the high-frequency transmission line 30 as shown in FIG. 7, and the high-frequency transmission line 30 is connected to the high-frequency device via the coaxial connector 32.
- the dielectric 38 is housed in a metal jacket 36, and the central conductor 40 is embedded in the dielectric 38.
- the jacket 36 is provided with an outer conductor 34.
- the coaxial connector 32 is caulked with the high-frequency transmission line 30 by the outer conductor 34. At this time, the outer conductor 34 is connected to the conductive films 18a to 18e, and the center conductor 40 is connected to the signal line conductor 14.
- the signal line conductor 14 extends in the signal propagation direction (X-axis direction), and the dielectric 12 also surrounds the signal line conductor 14 and extends in the signal propagation direction.
- the conductive films 18a to 18e functioning as ground conductors extend on the side surfaces of the dielectric 12 in the signal propagation direction.
- the conductive films 26, 26,... Functioning as bridge conductors extend the side surfaces of the dielectric 12 in a direction crossing the signal propagation direction, and connect the conductive films 18a to 18e to each other.
- the distance between the conductive films 26, 26,... is desirably 1 ⁇ 2 or less of the wavelength corresponding to the maximum frequency of the high-frequency signal to be transmitted.
- the characteristic impedance is lowered when the capacitance value of the signal line conductor 14 and the ground conductor is increased by the bridge conductor.
- the slit width may be changed periodically or the width of the center conductor may be changed in order to generate an impedance discontinuity.
- the dielectric 12 is made of a flexible material (Teflon (registered trademark), PET, polyimide, etc.), the thickness of the conductive films 18a to 18e, 26, 26,. The bendability and springback property of the track 30 can be controlled.
- a transmission member 50 includes a dielectric 52 formed in a prismatic shape by a dielectric material such as Teflon (registered trademark), PET, or polyimide.
- the dielectric 52 is integrally formed by extruding a single material.
- the length of the dielectric 52 extends along the X axis, the width of the dielectric 52 extends along the Y axis, and the thickness of the dielectric 52 extends along the Z axis. The length is arbitrarily adjusted, and the width and thickness are adjusted to a uniform size over the entire length.
- a signal line conductor 54 extending along the X axis is embedded in the dielectric 52.
- the signal line conductor 54 is made of a metal material having a small specific resistance mainly composed of silver or copper, and is embedded in the center of the cross section of the dielectric 52 perpendicular to the X-axis direction.
- the high-frequency signal propagates through the signal line conductor 54 in the X-axis direction.
- film member 56 is made of a dielectric film 62 formed of a dielectric and heat-shrinkable material such as Teflon (registered trademark), PET, polyimide, and the like, and an aluminum foil as a dielectric.
- the conductive film 58a to 58e, 60, 60,... Printed on the main surface of the film 62 is formed.
- the main surface of the dielectric film 62 is rectangular, and the length, width and thickness of the rectangle extend along the X axis, Y axis and Z axis.
- the length of the dielectric film 62 substantially matches the length of the dielectric 52, and the width of the dielectric film 62 is slightly longer than the length of the outer periphery of the dielectric 52 in the direction around the X axis.
- the lengths of the conductive films 58a to 58e are almost the same as the length of the dielectric film 62.
- the width of each of the conductive films 58a and 58b is slightly smaller than 1 ⁇ 2 of the width of the dielectric 12
- the width of each of the conductive films 58c and 58e is slightly smaller than the thickness of the dielectric 52
- the conductive The width of the film 58d is slightly smaller than the width of the dielectric 52.
- the conductive films 58a to 58e are printed on the lower surface of the dielectric film 62 (main surface facing the negative side in the Z-axis direction) so as to be arranged in this order and in a non-contact manner toward the negative side in the Y-axis direction. Is done.
- each of the conductive films 60, 60,... Is formed such that the main surface is rectangular.
- the length of the rectangle is slightly longer than the length of the outer periphery of the dielectric 52 and slightly shorter than the width of the dielectric film 62.
- the conductive films 60, 60,... Extend in the Y axis and are arranged at equal intervals in the X axis direction, with the lower surface of the dielectric film 62 (mainly facing the negative side in the Z axis direction). Printed on the surface).
- the conductive films 58a to 58e are electrically coupled by the printed conductive films 60, 60,.
- the film member 56 is wound around the transmission member 50 in the manner shown in FIGS. Specifically, the film member 56 is wound around the X axis with the lower surface of the dielectric film 62 facing the main surface or side surface of the transmission member 50. In the wound state, the conductive films 58a to 58e extend along the signal propagation direction, and the conductive films 60, 60,... Extend in a direction crossing the signal propagation direction.
- the main surfaces of the conductive films 58a and 58b are exposed on the positive side in the Z-axis direction, the main surface of the conductive film 58c is exposed on the positive side in the Y-axis direction, and the main surface of the conductive film 58d is negative in the Z-axis direction. Exposed to the side. However, the main surface of the conductive film 58 e is almost covered with the film member 56. On the other hand, the main surfaces of the conductive films 60, 60,... Are almost exposed to the outside. At this time, both ends of each of the conductive films 60, 60,... Partially overlap in the direction around the X axis, and are capacitively coupled. Thereby, regarding the high frequency signal, both ends of the conductive film 60 are considered to be connected to each other.
- the conductive films 58a to 58e attached to the transmission member 50 function as ground conductors.
- the conductive films 58a to 58e form a triplate structure together with the signal line conductor 54, and a slit extending along the X axis is provided between the conductive films 58a and 58b.
- the conductive films 60, 60,... Function as bridge conductors.
- the conductive films 58a to 58e are electrically connected at equal intervals in the X-axis direction, and the ground potential is stabilized.
- the high-frequency transmission line 64 can be manufactured more easily than in the above-described embodiment, and the thickness of the high-frequency transmission line 64 can be reduced.
- the high-frequency transmission line 64 thus produced is also used to connect a high-frequency device such as an antenna element and a high-frequency device such as an RF circuit in a high-frequency device such as a mobile communication terminal.
- the high-frequency transmission line 64 is connected to the high-frequency device via the coaxial connector 32.
- FIG. from the viewpoint of reducing the thickness of the high-frequency transmission line 64, it is preferable to provide the overlapping portion on the side surface.
- an insulating protective layer 66 may be provided on the outer periphery of the high-frequency transmission line 64 as shown in FIG.
- a transmission member 70 includes a dielectric 72 formed in a long shape from a dielectric material such as Teflon (registered trademark), PET, polyimide, or the like.
- the dielectric 72 is integrally formed by extruding a single material.
- the length of the dielectric 72 extends along the X axis, the width of the dielectric 72 extends along the Y axis, and the thickness of the dielectric 72 extends along the Z axis. The length is arbitrarily adjusted, and the width and thickness are adjusted to a uniform size over the entire length.
- the cross section of the dielectric 72 orthogonal to the X axis forms an octagon.
- two surfaces facing the Z-axis direction form a main surface
- two surfaces facing the Y-axis direction form side surfaces.
- the four corners formed by the main surface and the side surfaces in contact with each other are chamfered, thereby forming four inclined surfaces.
- a plate-like signal line conductor 74 extending along the X axis is embedded in the dielectric 72.
- the signal line conductor 74 is made of a metal material whose main component is silver or copper and has a small specific resistance, and is embedded in the center of the cross section of the dielectric 72 perpendicular to the X-axis direction.
- the high-frequency signal propagates through the signal line conductor 74 in the X-axis direction.
- a film member 76 is made of a dielectric film 82 formed of a dielectric and heat-shrinkable material such as Teflon (registered trademark), PET, polyimide, etc., and an aluminum foil as a dielectric material.
- the conductive film 78a to 78c, 80, 80,... Printed on the main surface of the film 82 is formed.
- the main surface of the dielectric film 82 is rectangular, and the length, width, and thickness of the rectangle extend along the X, Y, and Z axes.
- the length of the dielectric film 82 substantially matches the length of the dielectric 72, and the width of the dielectric film 82 is slightly longer than the length of the outer periphery of the dielectric 72 in the direction around the X axis.
- Each of the conductive films 80, 80,... Is formed so that the main surface is rectangular.
- the length of the rectangle is slightly longer than the length of the outer periphery of the dielectric 82 and slightly shorter than the width of the dielectric film 82.
- the conductive films 80, 80,... Have a length extending along the Y-axis and arranged at equal intervals in the X-axis direction, and the upper surface of the dielectric film 82 (the upper surface facing the negative side in the Z-axis direction). ) Is printed.
- the lengths of the conductive films 78a to 78c are almost the same as the length of the dielectric film 82.
- the width of each of the conductive films 78 a and 78 b is slightly smaller than 1 ⁇ 2 of the width of the main surface of the dielectric 72
- the width of the conductive film 78 c is slightly smaller than the width of the main surface of the dielectric 72.
- the conductive films 78a to 78c are printed on the upper surface of the dielectric film 82 (the main surface facing the positive side in the Z-axis direction) so as to be arranged in this order and in a non-contact manner toward the negative side in the Y-axis direction. Is done.
- the conductive films 78a to 78c are electrically coupled by conductive films 80, 80,.
- the film member 76 is wound around the transmission member 70 in the manner shown in FIG. Specifically, the film member 76 is wound around the X-axis with the lower surface of the dielectric film 82 facing the main surface, side surface, or slope of the transmission member 70. In the wound state, the conductive films 78a to 78c extend along the signal propagation direction, and the conductive films 80, 80,... Extend in a direction crossing the signal propagation direction.
- the main surfaces of the conductive films 78a and 88b are exposed on the positive side in the Z-axis direction, and the main surface of the conductive film 78c is exposed on the negative side in the Z-axis direction.
- the main surfaces of the conductive films 80, 80,... are almost exposed to the outside.
- both ends of each of the conductive films 80, 80,... Partially overlap in the direction around the X axis. As a result, for the high-frequency signal, both ends of the conductive film 80 are considered to be connected to each other.
- the conductive films 78a to 78c attached to the transmission member 70 function as ground conductors.
- the conductive films 78a to 78c form a triplate structure together with the signal line conductor 74, and a slit extending along the X axis is provided between the conductive films 78a and 78b.
- the conductive films 80, 80,... Function as bridge conductors.
- the conductive films 78a to 78c are electrically connected at equal intervals in the X-axis direction, and the ground potential is stabilized. In other words, it is possible to suppress the occurrence of a large standing wave at the end of the slit in the X-axis direction and the occurrence of unnecessary radiation to the outside due to this standing wave.
- the high-frequency transmission line 84 can be manufactured more simply than in the above-described embodiment, and the thickness of the high-frequency transmission line 84 can be reduced.
- the conductive film is formed when the high-frequency transmission line 84 is bent as compared with the above-described embodiment.
- the stress applied to the 80 corners can be further relaxed. That is, the flexibility of the high-frequency transmission line 84 is further improved.
- the high-frequency transmission line 84 thus produced is also used to connect a high-frequency device such as an antenna element and a high-frequency device such as an RF circuit in a high-frequency device such as a mobile communication terminal.
- the high frequency transmission line 84 is connected to the high frequency device via the coaxial connector 32.
- FIG. from the viewpoint of reducing the thickness of the high-frequency transmission line 84, it is preferable to provide the overlapping portion on the side surface.
- an insulating protective layer 86 may be provided on the outer periphery of the high-frequency transmission line 84 as shown in FIG.
- the cross section of the dielectric 72 is formed in a polygonal shape, but the cross section may be formed in a circular shape (including an ellipse).
- the transmission member 90 of this embodiment includes a dielectric 92 formed in a prismatic shape by a dielectric material such as Teflon (registered trademark), PET, polyimide, or the like.
- the dielectric 92 is integrally formed by extruding a single material.
- the length of the dielectric 92 extends along the X axis, the width of the dielectric 92 extends along the Y axis, and the thickness of the dielectric 92 extends along the Z axis. The length is arbitrarily adjusted, and the width and thickness are adjusted to a uniform size over the entire length.
- a signal line conductor 94 extending along the X axis is embedded in the dielectric 92.
- the signal line conductor 94 is made of a metal material having a small specific resistance mainly composed of silver or copper, and is embedded in the center of the cross section of the dielectric 92 perpendicular to the X-axis direction.
- the high-frequency signal propagates through the signal line conductor 94 in the X-axis direction.
- Conductive films 96a and 96b made of copper foil are attached to one main surface (main surface facing the positive side in the Z-axis direction) of the dielectric 94 by thermocompression bonding or the like.
- a conductive film 96c made of copper foil is attached to the other main surface of the dielectric 92 (main surface facing the negative side in the Z-axis direction) by thermocompression bonding or the like. Specifically, all of the conductive films 96a to 96c are formed by pressure bonding a roll-shaped copper foil after the dielectric 92 is extruded.
- the lengths of the conductive films 96a to 96c are almost the same as the length of the dielectric 92. Further, the width of the conductive film 96 c substantially matches the width of the dielectric 92. However, the width of each of the conductive films 96 a and 96 b is slightly smaller than 1 ⁇ 2 of the width of the dielectric 92. Further, the Y-axis direction negative side end portion of the conductive film 96 a is in contact with the Y-axis direction negative side end portion of one main surface of the dielectric 92, and the Y-axis direction positive side end portion of the conductive film 96 b is the one main surface of the dielectric 92. It is in contact with the Y axis direction positive end of the surface.
- a ribbon-shaped conductor 98 is spirally wound around the transmission member 90 as shown in FIGS.
- the main surface of the conductor 98 is in contact with the main surfaces of the conductive films 96a to 96c, whereby the conductive films 96a to 96c are electrically connected through the conductor 98.
- the interval between adjacent spirals be 1 ⁇ 2 or less of the wavelength corresponding to the maximum frequency of the high-frequency signal to be transmitted. Thereby, unnecessary radiation from the slit formed between the conductors 96a and 96b and the side surface of the dielectric 92 can be suppressed.
- the high-frequency transmission line 100 thus produced is also used to connect a high-frequency device such as an antenna element and a high-frequency device such as an RF circuit in a high-frequency device such as a mobile communication terminal. As described above, the high-frequency transmission line 100 is connected to the high-frequency device via the coaxial connector 32. Note that an insulating protective layer 102 may be provided on the outer periphery of the high-frequency transmission line 100 as shown in FIG.
- protrusions may be provided on the back surfaces of the conductive films 96a to 96c, and further, small holes are continuously provided in the conductive films 96a to 96c, so that the dielectric 92 You may make it enter into this hole.
- the dielectric 12, 52, 72, or 92 is manufactured by extrusion molding.
- the dielectric 12, 52, 72, or 92 is manufactured by stacking a plurality of dielectric substrates. May be.
- the film member 16 is wound around the transmission member 10, but the transmission member 10 may be inserted into a patterned cylindrical film.
- the signal line conductor 14 is embedded in the center of the cross section of the dielectric 12 orthogonal to the X-axis direction.
- the signal line conductor 14 may be embedded at a position shifted in the Y-axis direction and / or the Z-axis direction from the center of the cross section of the dielectric 12 orthogonal to the X-axis direction, and further, the dielectric along the X-axis.
- a part of the signal line conductor 14 may be exposed on the side surface of the body 12.
- the cross section of the high-frequency transmission line 30 orthogonal to the X-axis is configured as shown in FIG.
- the five conductive films 18a to 18e are formed so that the conductor slits are formed at the corners of the transmission member 10 when the film member 16 is wound around the transmission member 10. Is printed on the main surface of the dielectric film 20. However, if it is not necessary to form a slit, a single conductive film having approximately the same size as the main surface of the dielectric film 20 may be printed on the main surface of the dielectric film 20. In this case, the cross section of the high-frequency transmission line 30 orthogonal to the X axis is configured as shown in FIG.
- each of the conductive films 60, 60,... Is partially overlapped in the direction around the X axis so that both ends of each conductive film 60 are capacitively coupled. Yes.
- both ends of each conductive film 60 may be directly connected by forming a through-hole or via-hole conductor that penetrates the conductive film 62 at the overlapping portion of each conductive film 60.
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- Coils Or Transformers For Communication (AREA)
Abstract
Description
14,54,74,94 …信号線路導体
12,20,24,52,62,72,82,92 …誘電体
18a~18e,58a~58e,78a~78c,96a~96c …グランド導体
26,60,80,98 …ブリッジ導体
Claims (8)
- 信号伝搬方向に延びる信号線路導体、
前記信号線路導体を埋設するように前記信号伝搬方向に延び、一方主面と前記一方主面に対向する他方主面と、前記一方主面と前記他方主面とに連なる側面と、を有する誘電体素体、
平面視したときに、前記信号線路導体に沿って前記信号線路導体と重なる導体非形成部が形成されるように、前記誘電体素体の一方主面上に配置されたグランド導体、および
前記導体非形成部に跨るように、かつ前記グランド導体と電気的に接続するように、前記誘電体素体の一方主面上に配置されたブリッジ導体を備える伝送線路であって、
前記ブリッジ導体は、前記誘電体素体に巻き付けられたフィルム上に形成されている、伝送線路。 - 前記グランド導体は、前記誘電体素体に巻き付けられたフィルム上に形成されている、請求項1記載の伝送線路。
- 前記ブリッジ導体および前記グランド導体は、同一のフィルム上に形成されている、請求項1または2記載の伝送線路。
- 前記グランド導体は、前記誘電体素体に巻き付けられた第1フィルム上に形成されており、前記ブリッジ導体は、前記第1フィルム上に巻き付けられた第2フィルム上に形成されている、請求項1または2記載の伝送線路。
- 前記ブリッジ導体の長さは、前記誘電体素体の外周の長さより長い、請求項1から4いずれかに記載の伝送線路。
- 前記フィルムは、熱収縮性を有する、請求項1から5いずれかに記載の伝送線路。
- 信号伝搬方向に延びる信号線路導体、
前記信号線路導体を埋設するように前記信号伝搬方向に延び、一方主面と前記一方主面に対向する他方主面と、前記一方主面と前記他方主面とに連なる側面と、を有する誘電体素体、
平面視したときに、前記信号線路導体に沿って前記信号線路導体と重なる導体非形成部が形成されるように、前記誘電体素体の一方主面上に配置されたグランド導体、および
前記導体非形成部に跨るように、かつ前記グランド導体と電気的に接続するように、前記誘電体素体の一方主面上に配置されたブリッジ導体を備える伝送線路であって、
前記ブリッジ導体は、線状導体を誘電体素体に巻き付けて形成されている、伝送線路。 - 前記ブリッジ導体は、前記信号伝搬方向を巻回軸とする螺旋状となるように、前記誘電体素体に巻き付けられている、請求項7記載の伝送線路。
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CN201390000367.2U CN204424414U (zh) | 2012-06-29 | 2013-06-12 | 传输线路 |
JP2014522523A JP5674076B2 (ja) | 2012-06-29 | 2013-06-12 | 伝送線路 |
US14/509,299 US9553347B2 (en) | 2012-06-29 | 2014-10-08 | Transmission line |
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JP2012147100 | 2012-06-29 | ||
JP2012-147100 | 2012-06-29 |
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US14/509,299 Continuation US9553347B2 (en) | 2012-06-29 | 2014-10-08 | Transmission line |
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WO2014002758A1 true WO2014002758A1 (ja) | 2014-01-03 |
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PCT/JP2013/066147 WO2014002758A1 (ja) | 2012-06-29 | 2013-06-12 | 伝送線路 |
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US (1) | US9553347B2 (ja) |
JP (1) | JP5674076B2 (ja) |
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JP6070908B2 (ja) * | 2014-12-01 | 2017-02-01 | 株式会社村田製作所 | 電子機器 |
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CN106471401B (zh) * | 2014-04-16 | 2020-01-21 | 日东电工株式会社 | 相位差膜、圆偏振片及图像显示装置 |
CN105140609B (zh) * | 2015-07-13 | 2019-05-24 | 上海安费诺永亿通讯电子有限公司 | 一种低损耗扁平传输线 |
Citations (3)
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JPS493182A (ja) * | 1972-04-26 | 1974-01-11 | ||
WO2004077600A1 (ja) * | 2003-02-25 | 2004-09-10 | Fujitsu Limited | 超伝導体伝送線路 |
JP2011181352A (ja) * | 2010-03-01 | 2011-09-15 | Yoshinokawa Electric Wire & Cable Co Ltd | 超極細同軸ケーブル及びその製造方法 |
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US3225351A (en) * | 1962-03-09 | 1965-12-21 | Maurice G Chatelain | Vertically polarized microstrip antenna for glide path system |
US3961296A (en) * | 1975-03-06 | 1976-06-01 | Motorola, Inc. | Slotted strip-line |
JP3173143U (ja) * | 2010-12-03 | 2012-01-26 | 株式会社村田製作所 | 高周波信号線路 |
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2013
- 2013-06-12 CN CN201390000367.2U patent/CN204424414U/zh not_active Expired - Lifetime
- 2013-06-12 JP JP2014522523A patent/JP5674076B2/ja active Active
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Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
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JPS493182A (ja) * | 1972-04-26 | 1974-01-11 | ||
WO2004077600A1 (ja) * | 2003-02-25 | 2004-09-10 | Fujitsu Limited | 超伝導体伝送線路 |
JP2011181352A (ja) * | 2010-03-01 | 2011-09-15 | Yoshinokawa Electric Wire & Cable Co Ltd | 超極細同軸ケーブル及びその製造方法 |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP6070908B2 (ja) * | 2014-12-01 | 2017-02-01 | 株式会社村田製作所 | 電子機器 |
JP6070909B2 (ja) * | 2014-12-01 | 2017-02-01 | 株式会社村田製作所 | 電子機器、電気素子および電気素子用トレイ |
JPWO2016088592A1 (ja) * | 2014-12-01 | 2017-04-27 | 株式会社村田製作所 | 電子機器、電気素子および電気素子用トレイ |
JPWO2016088693A1 (ja) * | 2014-12-01 | 2017-04-27 | 株式会社村田製作所 | 電子機器 |
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US20150024700A1 (en) | 2015-01-22 |
CN204424414U (zh) | 2015-06-24 |
JP5674076B2 (ja) | 2015-02-25 |
US9553347B2 (en) | 2017-01-24 |
JPWO2014002758A1 (ja) | 2016-05-30 |
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