Transmission line attached antenna and method for manufacturing the transmission line attached antenna

Abstract

The present invention provides a transmission line-attached antenna with a thin structure that saves space required when embedded in electronic devices with communication functions, and a structure that significantly improves signal reflection and transmission loss in the high frequency range. The transmission line attached antenna (1) is configured to have a first substrate (11) on which a first conductor (21) is formed, a cover layer (14) covering the first conductor (21), a second substrate (12) on which a second conductor (22) is formed, and a third substrate (13) on which a third conductor (23) is formed, and the second substrate (12), the cover layer (14), the first substrate (11), and the third conductor (23) are heat-compressed, and the first conductor (21) has an antenna conductor (31), a transmission line conductor (32), and a first ground conductor (41), and the second conductor (22) is ultrasonically bonded to the ground portion of the antenna conductor (31), and the second conductor (22) and the third conductor (23) are ultrasonically bonded to each other while surrounding the transmission line conductor (32).

Description

Technology Field

[0001] The present invention relates to a transmission line-attached antenna used in electronic devices. Background Technology

[0002] Conventionally, a wireless card module having an antenna substrate is known (Patent Document 1: Japanese Patent Publication No. 2002-092576). In addition, a transmission line is proposed in which a second conductor and a third conductor are arranged to surround a transmission line conductor and ultrasonically bonded (Patent Document 2: Japanese Patent Publication No. 2021-083040). Prior art literature

[0003] Patent Document 1: Japanese Patent Publication No. 2002-092576 Patent Document 2: Japanese Patent Publication No. 2021-083040 The problem to be solved

[0004] Electronic devices with communication functions, such as laptops, personal computers, and smartphones, are becoming smaller and lighter. However, the wireless card module described in Patent Document 1 is difficult to miniaturize further. Therefore, a coaxial cable integrated module in which a coaxial cable is soldered to an antenna substrate has been proposed and is commercially available. In the coaxial cable integrated module, the outer diameter of the coaxial cable is narrow, so when embedded in an electronic device, it is necessary to secure space for retrieving the coaxial cable. In addition, there is a problem of significant signal reflection or transmission loss because the coaxial cable and the antenna are soldered together. means of solving the problem

[0005] The present invention is made in consideration of the above circumstances and aims to provide a transmission line-attached antenna having a thin structure that saves space required when embedded in an electronic device having communication functions, and a structure that significantly improves signal reflection or transmission loss in the high frequency range.

[0006] In one embodiment, the above problem is solved by a solution means as disclosed below.

[0007] The transmission line attached antenna according to the present invention comprises a first substrate having a first conductor formed thereon, a coverlay covering the first conductor, a second substrate having a second conductor formed thereon, and a third substrate having a third conductor formed thereon, wherein the coverlay is heat-pressed to the first substrate, the second substrate is heat-pressed to the coverlay, and the third substrate is heat-pressed to the first substrate, wherein the first conductor has an antenna conductor, a transmission line conductor connected to the feed portion of the antenna conductor, and a first ground conductor located near the end of the transmission line conductor, wherein the second conductor is ultrasonically bonded to the ground portion of the antenna conductor, and the second conductor and the third conductor are ultrasonically bonded to each other in a state surrounding the transmission line conductor.

[0008] According to this configuration, since the antenna conductor and the transmission line conductor are integrally formed from the same material, signal reflection and transmission loss at the antenna connection part can be significantly improved. In addition, because the first substrate, the coverlay, the second substrate, and the third substrate are laminated to form an integrated structure combining thermal compression and ultrasonic bonding, a thin structure suitable for space saving can be achieved.

[0009] A method for manufacturing a transmission line-attached antenna according to the present invention comprises a first substrate having a first conductor formed thereon, a coverlay covering the first conductor, a second substrate having a second conductor formed thereon, and a third substrate having a third conductor formed thereon, wherein the coverlay is heat-pressed to the first substrate, the second substrate is heat-pressed to the coverlay, and the third substrate is heat-pressed to the first substrate, and the first conductor has an antenna conductor, a transmission line conductor connected to the feed portion of the antenna conductor, and a first ground conductor located near the end of the transmission line conductor, wherein the second conductor is ultrasonically bonded to the ground portion of the antenna conductor, and the second conductor and the third conductor are ultrasonically bonded to each other while surrounding the transmission line conductor.

[0010] According to this configuration, since the antenna conductor and the transmission line conductor are integrally formed from the same material, signal reflection and transmission loss at the antenna connection part can be significantly improved. In addition, by laminating the first substrate, the coverlay, the second substrate, and the third substrate, and forming an integrated structure by combining thermal compression and ultrasonic bonding, it is possible to simultaneously manufacture a thin antenna and a transmission line that are space-saving. Therefore, the number of manufacturing processes can be significantly reduced.

[0011] As an example, the first substrate and the coverlay are composed of fluoropolymer resin. This enables high-speed transmission. As an example, the antenna conductor is configured to have an inverted F-shaped antenna section. This allows the antenna section to be configured to support high-frequency multi-bands. As an example, it is easy to configure the antenna section to support two frequencies, such as the 2.45 GHz band and the 5.2 GHz band.

[0012] As an example, the transmission line conductor has a straight section extending in a straight shape from the end and a curved section extending from the straight section, and is configured such that the curved section and the feed section are connected. This allows the antenna section and the transmission line to be arranged in an intersecting manner, thereby facilitating a reduction in the wiring length. As an example, both the second conductor and the third conductor are configured to have an L-shape in a planar view. This allows the antenna section and the transmission line to be arranged orthogonally, thereby minimizing the wiring length.

[0013] As an example, the second conductor and the third conductor are set to have the same external shape. Since the second conductor and the third conductor, having the same external shape, are positioned on the same front and back, bending of the substrate can be prevented.

[0014] As an example, the first conductor has a second ground conductor adjacent to the transmission line conductor, the second ground conductor is positioned opposite the grounding portion by fitting the transmission line conductor, and the third conductor has a plurality of through holes formed at a position overlapping the grounding portion when viewed from the bottom. That is, since the transmission line conductor at a location connected to the power supply is ultrasonically bonded to each other while the second conductor, the second ground conductor, the grounding portion, and the third conductor surround it, the shielding effect can be further enhanced. In addition, since the second conductor and the third conductor are positioned opposite each other, stress during processing is offset, thereby preventing bending of the substrate.

[0015] As an example, the first conductor has a second ground conductor located near the transmission line conductor, and the second ground conductor is positioned opposite the grounding portion by interlocking the transmission line conductor. The second conductor and the third conductor overlap by interlocking the grounding portion, and an anvil is brought into contact with the second conductor. A horn, having a shaft arranged at a predetermined interval, is thrust from a direction opposite to the anvil to bring into contact with the grounding portion, thereby ultrasonically joining the third conductor and the grounding portion by means of the anvil and the horn. By doing so, the portion where the second conductor, the grounding portion, and the third conductor overlap is restrained by the anvil, thereby preventing the conductor from being dragged during ultrasonic joining. Furthermore, it is possible to prevent the thermoplastic resin from being extruded more than necessary during ultrasonic joining, and at the same time, to mitigate thermal distortion when the thermoplastic resin undergoes thermal shrinkage after ultrasonic joining. Therefore, it is possible to manufacture a transmission line-attached antenna with a thin structure that saves space and significantly improves signal reflection and transmission loss in the high frequency range. Effects of the invention

[0016] According to the transmission line-attached antenna of the present invention, it is possible to realize a transmission line-attached antenna with a structure that is thin enough to save space when embedded in an electronic device having communication functions, and also has a structure that significantly improves signal reflection and transmission loss in the high frequency range. Brief explanation of the drawing

[0017] FIG. 1 is a schematic plan view illustrating an example of a transmission line-attached antenna of the present embodiment. FIG. 2A is a side view of the transmission line-attached antenna shown in FIG. 1, and FIG. 2B is a bottom view of the transmission line-attached antenna shown in FIG. 1. FIG. 3 is a cross-sectional view along line III-III of the transmission line-attached antenna shown in FIG. 1. FIG. 4 is a cross-sectional view along line IV-IV of the transmission line-attached antenna shown in FIG. 1. FIG. 5A is a schematic plan view illustrating an example of a first shield in a transmission line-attached antenna shown in FIG. 1, FIG. 5B is a schematic plan view illustrating an example of a coverlay in a transmission line-attached antenna shown in FIG. 1, FIG. 5C is a schematic plan view illustrating an example of a base in a transmission line-attached antenna shown in FIG. 1, and FIG. 5D is a schematic plan view illustrating an example of a second shield in a transmission line-attached antenna shown in FIG. 1. FIG. 6A is a schematic cross-sectional view illustrating an ultrasonic coupling structure in a transmission line-attached antenna as illustrated in FIG. 1, FIG. 6B is a schematic perspective view illustrating an example of an anvil, and FIG. 6C is a schematic perspective view illustrating an example of a horn. FIG. 7 is a schematic plan view illustrating an example of a case in which a transmission line-attached antenna shown in FIG. 1 is simultaneously integrated into a sheet-shaped workpiece state for manufacturing. FIG. 8 is a schematic rear view illustrating an example of attaching the transmission line-attached antenna shown in FIG. 1 to the rear side of a monitor. FIG. 9 is a frequency characteristic graph illustrating the results of simulating S-parameters in an antenna attached to a transmission line of the present embodiment. FIG. 10 is a flowchart illustrating the manufacturing sequence of a transmission line-attached antenna of the present embodiment. Specific details for implementing the invention

[0018] Embodiments of the present invention will be described in detail below with reference to the drawings. The transmission line attached antenna (1) of this embodiment is composed of a flexible multilayer wiring board, and the antenna conductor (31) and the transmission line conductor (32) are integrally formed from the same material. FIG. 1 is a schematic plan view illustrating an example of the transmission line attached antenna (1), and the area (P4) enclosed by dashed lines shows an enlarged view of the antenna conductor (31) in a plan view. FIG. 2A is a side view of the transmission line attached antenna (1). FIG. 2B is a bottom view of the transmission line attached antenna (1), and the area (P5) enclosed by dashed lines shows an enlarged view of the antenna conductor (31) in a bottom view. FIG. 3 is a cross-sectional view along line III-III of FIG. 1. FIG. 4 is a cross-sectional view along line IV-IV of FIG. 1. In addition, in all drawings for describing embodiments, the same reference numeral is used for members having the same function, and their repeated description may be omitted.

[0019] As illustrated in FIGS. 1 to 4, the transmission line attached antenna (1) comprises a first substrate (11) having a first conductor (21) formed thereon, a cover layer (14) covering the first conductor (21), a second substrate (12) having a second conductor (22) formed thereon, and a third substrate (13) having a third conductor (23) formed thereon. The cover layer (14) is heat-pressed to the first substrate (11), the second substrate (12) is heat-pressed to the cover layer (14), and the third substrate (13) is heat-pressed to the first substrate (11), forming an integrated structure. And, the second conductor (22) is ultrasonically bonded to the ground portion (31c) of the antenna conductor (31), and the second conductor (22) and the third conductor (23) are ultrasonically bonded to each other while surrounding the transmission line conductor (32), and the ground portion (31c) and the transmission line conductor (32) are shielded by the second conductor (22) and the third conductor (23). As an example, a connector (43) is mounted at the input terminal of the transmission line conductor (32) and connected to a control circuit, and the control circuit and the antenna conductor (31) are signal connected.

[0020] FIG. 5A is a schematic plan view illustrating an example of a first shield (35), FIG. 5B is a schematic plan view illustrating an example of a coverlay (14), FIG. 5C is a schematic plan view illustrating an example of a base (30), and FIG. 5D is a schematic plan view illustrating an example of a second shield (36). As shown in FIG. 5C, the first conductor (21) has an antenna conductor (31), a transmission line conductor (32) connected to the feed portion (31a) of the antenna conductor (31), and a first ground conductor (41) located near the end portion (32a) of the transmission line conductor (32). The first conductor (21) has a second ground conductor (42) that is close to the transmission line conductor (32), and the second ground conductor (42) is positioned opposite the grounding portion (31c) by fitting the transmission line conductor (32).

[0021] As an example, the transmission line conductor (32) has a straight section (32b) extending in a straight shape from the end (32a) and a curved section (32c) extending from the straight section (32b), and the curved section (32c) is connected to the feed section (31a). As an example, the antenna section (31b) of the antenna conductor (31) and the straight section (32b) of the transmission line conductor (32) are arranged orthogonally.

[0022] As an example, the first substrate (11) and the coverlay (14) are made of thermoplastic fluoropolymer resin. As an example, the second substrate (12) and the third substrate (13) are made of thermoplastic polyimide resin. As an example, the antenna conductor (31) has an inverted F-shaped antenna portion (31b).

[0023] As shown in FIGS. 5A and 5D, the first shield (35) with the second conductor (22) formed thereon and the second shield (36) with the third conductor (23) formed thereon both exhibit an L-shape in plan view and are set to have the same external size. As shown in FIG. 5A, the first shield (35) has a fifth window (35a) formed therein to expose the end (32a) of the transmission line conductor (32).

[0024] As shown in FIGS. 3, 5B, and 5C, the base (30) has a plurality of first window portions (11a) formed through it to ultrasonically bond the second conductor (22) and the third conductor (23), and the coverlay (14) has a plurality of second window portions (14a) formed through it to ultrasonically bond the second conductor (22) and the third conductor (23). As shown in FIG. 5B, the coverlay (14) has a plurality of third window portions (14b) formed through it to ultrasonically bond the second conductor (22) and the ground portion (31c), and the coverlay (14) has a fourth window portion (14c) formed through it to ultrasonically bond the second conductor (22) and the second ground conductor (42).

[0025] As shown in FIG. 1, the second conductor (22) has a plurality of concave portions (22a) formed at a position overlapping the ground portion (31c) in a planar view.

[0026] As shown in FIG. 7, as an example, the transmission line attached antenna (1) is manufactured by simultaneously integrating it into a sheet-shaped workpiece. The transmission line attached antenna (1) is formed into a first gap (P1) and is divided in the subsequent dividing step to become a single transmission line attached antenna (1).

[0027] FIG. 8 is a schematic rear view illustrating an example of a case where a transmission line attached antenna (1) is attached to the rear side of a monitor (71) in an electronic device having communication functions, such as a laptop personal computer or a smartphone. As an example of an electronic device having communication functions, a flat-shaped monitor (71) consisting of a liquid crystal display or an organic EL display is placed on the rear side of a bezel (70). The transmission line attached antenna (1) has an inverted F-shaped antenna section and is compatible with high frequency multi-bands. As an example, the transmission line attached antenna (1) has an L-shaped form when viewed in a flat state, and its thickness is set to 0.5 mm or less.

[0028] According to the transmission line attached antenna (1) of the present embodiment, a pair can be attached to the back side of the monitor (71), thus allowing for space saving when embedded in an electronic device. In addition, since the outermost layer of the transmission line attached antenna (1) is covered with an insulating resin material, oxidation of the internal conductor can be prevented, and attachment into the electronic device can be facilitated. Furthermore, the above configuration is an example, and the transmission line attached antenna (1) can be set to any shape depending on the shape, size, or arrangement of the monitor. As an example, the transmission line attached antenna (1) can be in an I-shape when in a flat state.

[0029] FIG. 9 is a frequency characteristic graph showing the results of simulating S-parameters in the transmission line-attached antenna (1) of the present embodiment. The vertical axis is the reflected signal level and the horizontal axis is the sweep frequency. From the simulation results, it was confirmed that the transmission line-attached antenna (1) is an antenna section corresponding to two frequencies, a frequency band of 2.45 GHz and a frequency band of 5.2 GHz.

[0030] As an example, the manufacturing device for the transmission line-attached antenna (1) is configured such that, starting from the upstream side, a first conductor forming device, an unnecessary area removal device, a first bonding device, a heat pressing device, a second bonding device, an inspection device, and a split extraction device are arranged in order, and a controller for controlling these is provided.

[0031] Next, a method for manufacturing a transmission line-attached antenna (1) according to the present invention is described below.

[0032] FIG. 10 is a flowchart illustrating the manufacturing sequence of a transmission line attached antenna (1) of the present embodiment. As an example, the transmission line attached antenna (1) is manufactured in the order of a first conductor forming step (S1), an unnecessary area removal step (S2), a first joining step (S3), a second joining step (S4), a heat pressing step (S5), an inspection step (S6), and a splitting step (S7).

[0033] As an example, the first conductor (21), the second conductor (22), and the third conductor (23) are made of copper or a copper alloy. The first conductor forming step (S1) involves performing an etching treatment on a double-sided copper substrate by a subtractive method to form an antenna conductor (31), a transmission line conductor (32), a first ground conductor (41), and a second ground conductor (42) on the first main surface of the first substrate (11), and removing the conductors from the second main surface of the first substrate (11) to form a base (30). By doing this, the base (30) can be made flat by preventing bending. In addition to the above method, pattern plating treatment may be performed on the first main surface of the first substrate (11) by the additive method to form an antenna conductor (31), a transmission line conductor (32), a first ground conductor (41), and a second ground conductor (42) to form a base (30).

[0034] As an example, the first substrate (11) and coverlay (14) are selected from tetrafluoroethylene-perfluoroalkyl vinyl ether copolymer (PFA), tetrafluoroethylene-hexafluoropropylene (FEP), polychlorotrifluoroethylene (PCTFE), tetrafluoroethylene-ethylene copolymer (ETFE), chlorotrifluoroethylene-ethylene copolymer (ECTFE), polyvinylidene fluoride (PVDF), polytetrafluoroethylene (PTFE), and other known thermoplastic fluoropolymers. As an example, the second substrate (12) and the third substrate (13) are made of thermoplastic polyimide resin (PE).

[0035] The unnecessary area removal step (S2) involves forming multiple rectangularly penetrating window portions by using an unnecessary area remover to punch out the unnecessary area while the base (30) and the coverlay (14) are overlapped. The window portions are the first window portion (11a) and the second window portion (14a). Additionally, as an alternative configuration, it is possible to omit the unnecessary area removal step (S2) by punching out the unnecessary area in advance to form rectangularly penetrating window portions.

[0036] The first bonding step (S3) ultrasonically bonds the second conductor (22) to the third conductor (23) at the location where the unnecessary area in the workpiece has been removed using the first bonding machine.

[0037] The second bonding step (S4) ultrasonically bonds the second conductor (22) to the ground portion (31c) at the third window portion (14b) and the fourth window portion (14c) of the work using the second bonding device, and also ultrasonically bonds the second conductor (22) to the second ground conductor (42).

[0038] In addition to the above configurations, the order of the first joining step (S3) and the second joining step (S4) may be swapped, and the first joining step (S3) and the second joining step (S4) may be performed simultaneously in a batch.

[0039] As illustrated in FIGS. 6A to 6C, in ultrasonically bonding the second conductor (22) to the grounding portion (31c), an anvil (51) that contacts the first shield (35) from above and a horn (52) that contacts the grounding portion (31c) from below opposite the anvil (51) are arranged at a predetermined pitch, and the horn (52) is inserted from the direction opposite the anvil (51) to form a through hole (23a) in the third conductor (23), and then the grounding portion (31c) is contacted so that the second conductor (22) and the grounding portion (31c) are ultrasonically bonded by the anvil (51) and the horn (52). As an example, in ultrasonically bonding the second conductor (22) to the second ground conductor (42), an anvil (51) that contacts the first shield (35) from above and a horn (52) that contacts the second ground conductor (42) from below opposite the anvil (51) are arranged at a predetermined pitch, and the horn (52) is inserted from the direction opposite the anvil (51) to form a through hole (23a) in the third conductor (23), and then contacts the second ground conductor (42) and ultrasonically bonds the second conductor (22) and the second ground conductor (42) by means of the anvil (51) and the horn (52).

[0040] As an example, the surface in contact with the first shield (35) in the anvil (51) is arranged in a single row with a pitch of 1.13 mm and a square pyramid with a tip of 0.2 mm × 0.2 mm and a projection angle of 45 degrees. As an example, the horn (52) is arranged in a single row with a pitch of 1.13 mm and a tip of 0.2 mm diameter and a pyramid.

[0041] The heat pressing step (S5) heat-presses the workpiece collectively using a roll press with a heat press machine. By doing so, the coverlay (14) is heat-pressed onto the first substrate (11), the second substrate (12) is heat-pressed onto the coverlay (14), and the third substrate (13) is heat-pressed onto the first substrate (11).

[0042] In the inspection step (S6), as an example, the contact pin of the inspection device is brought into contact with the antenna conductor (31) and the transmission line conductor (32) to conduct current, thereby inspecting whether the antenna conductor (31) and the transmission line conductor (32) are not disconnected and whether the conduction level is within the normal range. In the splitting step (S7), the workpiece is punched along a predetermined cut line by the punching action of the splitting extraction device. In this way, the transmission line attached antenna (1) of the present embodiment is manufactured.

[0043] [Example]

[0044] In the embodiment, the first substrate (11) is made of fluoropolymer (PFA). The coverlay (14) is made of fluoropolymer (PFA). The second substrate (12) is made of polyimide resin (PE). The third substrate (13) is made of polyimide resin (PE). The first conductor (21), the second conductor (22), and the third conductor (23) are made of copper and have a thickness of 12 μm. As an example, the transmission line attached antenna (1) of the embodiment has an overall length of 202 mm and a thickness of 0.348 mm, the length of the antenna conductor (31) is 49 mm, the width of the antenna conductor (31) is 11.0 mm, and the width of the transmission line conductor (32) is 5.0 mm. The characteristics of the prototype of the example were compared with those of a commercially available product consisting of a substrate antenna and a coaxial cable. It was confirmed that the prototype of the example showed significantly improved characteristics compared to the commercially available product, with signal reflection and transmission loss suppressed.

[0045] In the above-described embodiment, PFA was used for the first substrate (11) and the coverlay (14), but the invention is not limited to this example, and known thermoplastic resins may be applied. Although the above-described embodiment was described as a single transmission line attached antenna (1), the invention is not limited to this example. It is also possible to configure the transmission line attached antenna (1) in a multiple arrangement. The transmission line attached antenna (1) can be L-shaped or I-shaped in planar form, and can be set to any shape to match the wiring specifications when embedded in an electronic device. The antenna portion of the transmission line attached antenna (1) can be set to any shape to match a known high frequency band. The present invention is not limited to the above-described embodiment, and various modifications are possible within the scope of the invention without departing from it.

Claims

Claim 1 A transmission line attached antenna comprising a first substrate having a first conductor formed thereon, a coverlay covering the first conductor, a second substrate having a second conductor formed thereon, and a third substrate having a third conductor formed thereon, wherein the coverlay is heat-pressed to the first substrate, the second substrate is heat-pressed to the coverlay, and the third substrate is heat-pressed to the first substrate; wherein the first conductor comprises an antenna conductor, a transmission line conductor connected to a feed portion of the antenna conductor, and a first ground conductor formed on the same surface as the surface on which the transmission line conductor is arranged in the first substrate, separated from the end of the transmission line conductor, and provided at a position adjacent to the transmission line conductor; wherein the second conductor is ultrasonically bonded to the ground portion of the antenna conductor, and the second conductor and the third conductor are ultrasonically bonded to each other in a state surrounding the transmission line conductor. Claim 2 A transmission line attachment antenna according to claim 1, wherein the first conductor is formed on the same surface as the surface on which the transmission line conductor is disposed in the first substrate, is spaced apart from the transmission line conductor, and has a second ground conductor provided at a position adjacent to the transmission line conductor, the transmission line conductor is provided between the second ground conductor and the ground portion, and the third conductor has a plurality of through holes formed at a position overlapping the ground portion in the bottom view. Claim 3 An antenna attached to a transmission line according to claim 1 or 2, wherein the first substrate and the coverlay are made of fluoropolymer, the antenna conductor has an inverted F-shaped antenna portion, the transmission line conductor has a straight portion extending in a straight shape from the end and a curved portion bending from the straight portion, and the curved portion and the feed portion are connected. Claim 4 An antenna attached to a transmission line according to claim 1 or 2, characterized in that the second conductor and the third conductor both exhibit an L-shape in a planar view and have the same external size. Claim 5 A method for manufacturing a transmission line-attached antenna comprising a first substrate having a first conductor formed thereon, a coverlay covering the first conductor, a second substrate having a second conductor formed thereon, and a third substrate having a third conductor formed thereon, wherein the coverlay is heat-pressed to the first substrate, the second substrate is heat-pressed to the coverlay, and the third substrate is heat-pressed to the first substrate, wherein the first conductor comprises an antenna conductor, a transmission line conductor connected to a feed portion of the antenna conductor, and a first ground conductor formed on the same surface as the surface on which the transmission line conductor is arranged in the first substrate, separated from the end of the transmission line conductor, and provided at a position adjacent to the transmission line conductor, wherein the second conductor is ultrasonically bonded to the ground portion of the antenna conductor, and the second conductor and the third conductor are ultrasonically bonded to each other while surrounding the transmission line conductor. Claim 6 A method for manufacturing a transmission line-attached antenna according to claim 5, wherein the first conductor is formed on the same surface as the surface on which the transmission line conductor is disposed in the first substrate, is spaced apart from the transmission line conductor, and has a second ground conductor provided at a position adjacent to the transmission line conductor, wherein the transmission line conductor is provided between the second ground conductor and the ground portion, and the second conductor and the third conductor overlap the ground portion by fitting them together, thereby bringing an anvil into contact with the second conductor, and thrusting a horn, which has a shaft arranged at a predetermined interval, in a direction opposite to the anvil to bring it into contact with the ground portion, and ultrasonically joining the third conductor and the ground portion by the anvil and the horn. Claim 7 A method for manufacturing a transmission line attached antenna according to claim 5 or 6, wherein the first substrate and the coverlay are made of fluoropolymer, the antenna conductor has an inverted F-shaped antenna portion, the transmission line conductor has a straight portion extending in a straight shape from the end and a curved portion bending from the straight portion, and the curved portion and the feed portion are connected.

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