Tailgate and rear window glass

Abstract

At the same time, the receiving sensitivity in the area where the antenna conductor is arranged and in the AM broadcast frequency band area is ensured. A rear trunk door, which has a resin outer panel formed with an opening, a resin inner panel, a metal reinforcing material arranged between the outer panel and the inner panel, and a rear window glass covering the opening, the rear window glass having a first antenna conductor capable of receiving radio waves in the frequency band of AM broadcast waves, the first antenna conductor having a first feeder, and a first antenna element connected to the first feeder and having a total length of 100 mm to 1800 mm, the first antenna element extending along the first outer edge at a spacing of 3 mm to 60 mm relative to the first outer edge of the upper, lower, left, and right outer edges of a defogger, the first antenna element being located at a position at a spacing of more than 10 mm from the reinforcing material, or located on the side of the rear window glass where the reinforcing material does not exist relative to the first outer edge in a top view.

Description

Technical Field

[0001] The invention relates to a rear trunk door and a rear window glass. Background Art

[0002] Various functional components such as a defogger and an antenna are arranged in the rear window of a vehicle on the premise that the field of vision can be ensured. However, in a vehicle (e.g., a hatchback) with a relatively narrow size (area) of the rear window, if an area for arranging the defogger is ensured, it is difficult to ensure an area for arranging the antenna for the AM broadcast band area. Therefore, in the arrangement of the antenna for the AM broadcast band area, it is necessary to study the relationship with the arrangement of the defogger. As such an antenna for the AM broadcast band area, an antenna is disclosed which is provided in the rear window of a resin tailgate mounted with a metal reinforcement material and has a conductor along at least three of the four sides of the defogger (e.g., refer to Patent Document 1).

[0003] Prior art literature

[0004] Patent Literature

[0005] Patent Document 1: Japanese Patent Application Publication No. 2015-056716 Summary of the invention

[0006] Technical problem to be solved by the invention

[0007] However, the reception sensitivity in the AM broadcast band area may decrease due to the positional relationship between the defogger, the antenna conductor, and the reinforcement material. In addition, the size and shape of the rear window glass of the vehicle vary depending on the type of vehicle. Therefore, ensuring the configuration area of ​​the antenna conductor and ensuring the reception sensitivity in the specified AM broadcast band area are often in a contradictory relationship.

[0008] Therefore, the present disclosure provides a tailgate and a rear window glass capable of simultaneously ensuring reception sensitivity in the arrangement region of the antenna conductor and in the AM broadcast frequency band region.

[0009] Technical solutions adopted to solve technical problems

[0010] The present invention provides a rear trunk door having

[0011] a resin outer plate having an opening formed therein, and

[0012] Resin inner panels, and

[0013] a metal reinforcement material disposed between the outer plate and the inner plate, and

[0014] A rear window glass covering the opening,

[0015] The rear window glass includes a defogger and a first antenna conductor capable of receiving radio waves in a frequency band of AM broadcast waves.

[0016] The first antenna conductor includes a first power feeder and a first antenna element connected to the first power feeder and having a total length of 100 mm to 1800 mm.

[0017] The first antenna element has a first proximity portion extending along the first outer edge at a distance of 3 mm to 60 mm from the first outer edge of the upper, lower, left, and right outer edges of the defogger.

[0018] The first antenna element is located at a position spaced 10 mm or more from the reinforcing material, or is located on a side of the first outer edge where the reinforcing material does not exist in a plan view of the rear window glass.

[0019] In addition, the present disclosure provides a rear window glass,

[0020] The invention relates to a rear window glass that can be mounted on a rear trunk door made of resin and having a metal reinforcement material so as to cover an opening portion formed in the rear trunk door.

[0021] A defogger and a first antenna conductor capable of receiving radio waves in the frequency band of AM broadcast waves,

[0022] The first antenna conductor includes a first power feeder and a first antenna element connected to the first power feeder and having a total length of 100 mm to 1800 mm.

[0023] The first antenna element has a first proximity portion extending along the first outer edge at a distance of 3 mm to 60 mm from the first outer edge of the upper, lower, left, and right outer edges of the defogger.

[0024] When mounted on the rear trunk door, the first antenna element is located at a position spaced 10 mm or more from the reinforcing material, or is located on a side of the first outer edge where the reinforcing material does not exist in a plan view of the rear window glass.

[0025] Effects of the Invention

[0026] According to the technology disclosed in the present invention, it is possible to provide a tailgate and a rear window glass capable of ensuring reception sensitivity in both the arrangement area of ​​the antenna conductor and the AM broadcast frequency band area. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is a plan view showing a first configuration example of the rear trunk door.

[0028] Figure 2 It is a plan view schematically showing a first configuration example of a rear trunk door.

[0029] Figure 3 It is a plan view schematically showing a second configuration example of the rear trunk door.

[0030] Figure 4 It is a plan view schematically showing a third configuration example of the rear trunk door.

[0031] Figure 5 It is a plan view schematically showing a fourth configuration example of the rear trunk door.

[0032] Fig. 6A It is a plan view schematically showing various configuration examples of the antenna conductor.

[0033] Figure 6B It is a plan view schematically showing various configuration examples of the antenna conductor.

[0034] Figure 6C It is a plan view schematically showing various configuration examples of the antenna conductor.

[0035] Fig. 7A It is a plan view schematically showing various configuration examples of the antenna conductor.

[0036] Figure 7B It is a plan view schematically showing various configuration examples of the antenna conductor.

[0037] Fig. 8A It is a plan view schematically showing various configuration examples of the antenna conductor.

[0038] Figure 8B It is a plan view schematically showing various configuration examples of the antenna conductor.

[0039] Fig. 9 It is a plan view schematically showing a fifth configuration example of the rear trunk door.

[0040] Fig. 10A It is a plan view schematically showing a sixth configuration example of the rear trunk door.

[0041] Fig. 10B It shows that the horizontally polarized wave Fig. 10A A diagram showing an example of the measurement results of the FM gain in the configuration example shown.

[0042] Fig. 10C It shows that the vertically polarized wave Fig. 10A A diagram showing an example of the measurement results of the FM gain in the configuration example shown.

[0043] Fig.11 It is a plan view schematically showing a seventh configuration example of the rear trunk door.

[0044] Fig.12 It is a plan view schematically showing an eighth configuration example of the rear trunk door.

[0045] Fig.13 It is a plan view schematically showing a ninth configuration example of the rear trunk door.

[0046] Fig.14 It is a plan view schematically showing a tenth configuration example of the rear trunk door.

[0047] Fig.15 It is a plan view schematically showing an eleventh configuration example of the rear trunk door.

[0048] Fig.16 It is a plan view schematically showing a twelfth configuration example of the rear trunk door.

[0049] Fig.17 It is a plan view schematically showing a thirteenth configuration example of the rear trunk door.

[0050] Fig.18 It is a plan view schematically showing a fourteenth configuration example of the rear trunk door. DETAILED DESCRIPTION

[0051] Hereinafter, the embodiments of the present disclosure will be described with reference to the accompanying drawings. In addition, deviations that do not impair the effects of the present invention are allowed in parallel, right angles, horizontal, vertical, orthogonal, up and down, left and right directions. In addition, the X-axis direction, the Y-axis direction, and the Z-axis direction respectively represent the direction parallel to the X-axis, the direction parallel to the Y-axis, and the direction parallel to the Z-axis. The X-axis direction, the Y-axis direction, and the Z-axis direction are perpendicular to each other. The XY plane, the YZ plane, and the ZX plane respectively represent an imaginary plane parallel to the X-axis direction and the Y-axis direction, an imaginary plane parallel to the Y-axis direction and the Z-axis direction, and an imaginary plane parallel to the Z-axis direction and the X-axis direction.

[0052] Figure 1 It is a plan view showing a first configuration example of the rear trunk door. Figure 1 The rear trunk door 100 shown is a resin opening and closing body installed at the rear of the vehicle in an openable and closable manner. The rear trunk door 100 has a resin outer panel 12, a resin inner panel 13, a metal reinforcing material 14 arranged between the outer panel 12 and the inner panel 13, and a rear window glass 15. The outer panel 12 and the inner panel 13 are formed of synthetic resin such as polypropylene.

[0053] in addition, Figure 1 The plan view of the rear trunk door 100 with the inner panel 13 removed is shown from the viewpoint of the vehicle interior. Figure 1 The shapes of the parts shown are just examples, and the technology disclosed herein is not limited to the shapes shown in the figures.

[0054] The outer panel 12 has an opening 11 covered by a rear window glass 15. The rear window glass 15 is mounted on a window frame 16 formed on the outer panel 12. The window frame 16 is also called a flange and can be reinforced with metal. The outer panel 12 is composed of one or more outer panel parts. Figure 1 In the example shown, the outer plate 12 is composed of an upper outer plate portion and a lower outer plate portion. The upper outer plate portion and the lower outer plate portion are connected by a reinforcing material 14, whereby the opening portion 11 is formed in the outer plate 12. The opening portion 11 formed in the outer plate 12 is not limited to the form in which the entire periphery thereof is surrounded by the outer plate 12, and may also be Figure 1 As shown, a portion of the surrounding area is open.

[0055] The reinforcing material 14 is a metal member for reinforcing the outer plate 12, and is fixed to the outer plate 12 in a manner of surrounding a part or the whole of the opening 11 from the periphery. The reinforcing material 14 is composed of one or more members. Figure 1 In the example shown, it is composed of a plurality of members (left reinforcing material and right reinforcing material) separated to the left and right (in the vehicle width direction). The left reinforcing material has a left reinforcing material part 14A extending in the vertical direction in the left region of the opening 11, and a left upper reinforcing material part 14Ca extending in the right direction from the upper end of the left reinforcing material part in the upper region of the opening 11. The right reinforcing material has a right reinforcing material part 14B extending in the vertical direction in the right region of the opening 11, and a right upper reinforcing material part 14Cb extending in the left direction from the upper end of the right reinforcing material part in the upper region of the opening 11.

[0056] exist Figure 1 In the example shown, the left reinforcing material portion 14A and the upper left reinforcing material portion 14Ca are formed by the same member, but they may be formed by connecting two or more members, for example. However, when the outer plate 12 is not composed of the upper outer plate portion and the lower outer plate portion, for example, it is a form composed of a continuous panel portion, the left reinforcing material portion 14A and the upper left reinforcing material portion 14Ca may be separated. In addition, the left reinforcing material portion 14A overlaps with the rear window glass 15 and the opening portion 11 in a top view of the rear window glass 15, but it may be arranged in a manner not to overlap with the rear window glass 15 or the opening portion 11.

[0057] Similarly, in Figure 1In the example shown, the right reinforcing material portion 14B and the upper right reinforcing material portion 14Cb are formed by the same member, but they may be formed by connecting two or more members, for example. However, when the outer plate 12 is not composed of the upper outer plate portion and the lower outer plate portion, for example, it is a form composed of a continuous panel portion, the right reinforcing material portion 14B and the upper right reinforcing material portion 14Cb may be separated. In addition, the right reinforcing material portion 14B overlaps with the rear window glass 15 and the opening portion 11 in the top view of the rear window glass 15, but it may be arranged in a manner not to overlap with the rear window glass 15 or the opening portion 11.

[0058] The inner panel 13 is fixed to at least one of the outer panel 12 and the reinforcing material 14 so as to cover the reinforcing material 14. The inner panel 13 is formed so as not to block the field of vision through the rear window glass 11.

[0059] The rear window glass 15 is a window glass attached to the rear trunk door 100 so as to cover the opening 11 formed in the rear trunk door 100 made of resin. Figure 1 In the example shown, the defogger 20 and the first antenna conductor 30 are provided.

[0060] The defogger 20 is an electrically heated conductor pattern for removing fog from the rear window glass 15. The defogger 20 includes a plurality of heating wires extending in the left-right direction (horizontal direction) of the rear window glass 15 and a plurality of bus bars for supplying power to the plurality of heating wires. Figure 1 In the example shown, the rear window glass 15 is provided with a plurality of heating wires extending in parallel in the left-right direction (horizontal direction) of the rear window glass 15, and a pair of wide bus bars connecting the two sides of the plurality of heating wires. If a voltage is applied between the pair of bus bars, the plurality of heating wires are energized and generate heat, thereby removing the mist from the rear window glass 15. In addition, the defogger 20 is not limited to the case where a plurality of heating wires extending in the horizontal direction are used. For example, the defogger 20 may also be provided with heating wires located on the upper and lower sides of the defogger 20, located between a pair of (laterally longer) bus bars extending in the horizontal direction, and extending in the upper and lower directions (vertical directions) on the surface of the rear window glass 15. Furthermore, the defogger 20 may also be coated with a transparent or translucent conductive film between the pair of bus bars.

[0061] The shape and size of the first antenna conductor 30 are designed to be able to receive at least the radio waves of the frequency band of AM broadcast waves (for example, 500 kHz to 1800 kHz). If the first antenna conductor 30 is formed so as to receive at least the radio waves of the frequency band of AM broadcast waves (AM broadcast frequency band area), its shape and size are not affected by the above. Figure 1 Limited by the form.

[0062] For example, the first antenna conductor 30 is formed in a manner suitable for receiving radio waves in the MF (Medium Frequency) band, which is a frequency band including AM broadcast waves. Alternatively, the first antenna conductor 30 may be formed as a common antenna unit for receiving radio waves in both the MF band and the HF (High Frequency) band. In addition, the MF band represents a frequency band between 300kHz and 3MHz. The HF band represents a frequency band between 3MHz and 30MHz, also known as the SW (Short Wave) band.

[0063] In addition, a light-shielding film 17 for shielding visible light may also be formed in the outer peripheral edge of the rear window glass 15. As a specific example of the light-shielding film 17, ceramics such as black ceramic films may be cited. By providing the light-shielding film 17, the portion hidden by the light-shielding film 17 in the top view from the outside of the vehicle of the rear window glass 15 is not easily observed from the outside of the vehicle, and the design of the rear window glass 15 and the vehicle is improved. For example, the rear window glass 15 has a light-shielding film 17 that hides a portion of the reinforcing material 14 and the window frame 16 in the top view from the outside of the vehicle of the rear window glass 15. In the top view from the outside of the vehicle of the rear window glass 15, a portion or all of the antenna conductors such as the first antenna conductor 30 can be concealed by overlapping with the light-shielding film 17, and a portion of the defogger can be concealed by overlapping with the light-shielding film 17.

[0064] Figure 2 The first configuration example of the rear trunk door is schematically shown in a plan view from the viewpoint of the vehicle interior, with the inner panel 13 removed. Figure 2 In the figure, the outer edge of the rear window glass 15 is omitted, and the film edge of the light shielding film 17 is shown. The defogger 20 has upper, lower, left, and right outer edges (upper edge 21, lower edge 22, left edge 23, and right edge 24), and a pair of wide bus bars exist in the left edge 23 and the right edge 24. The rear window glass 15 has four peripheral areas 41 to 44 located on the outside of the defogger 20, namely, upper, lower, left, and right.

[0065] The first antenna conductor 30A corresponds to Figure 1 The first antenna conductor 30A is shown in FIG. The first antenna conductor 30A is disposed only in the peripheral region 42 below the lower edge 22 among the four peripheral regions 41 to 44. The first antenna conductor 30A includes a first power feeder 31 and a first antenna element 32 connected to the first power feeder 31 and having a total length of 100 mm to 1800 mm.

[0066] In addition, Figure 2In the example shown, among the four peripheral regions 41 to 44, both the first power feeder 31 and the first antenna element 32 are arranged only in the peripheral region 42 below the lower edge 22. However, the first antenna element 32 may be arranged only in the peripheral region 42, and the first power feeder 31 may be arranged across a region adjacent to the peripheral region 42 (for example, the peripheral region 43 to the left of the left edge 23) or a region adjacent thereto.

[0067] The signal received by the first antenna element 32 is taken out from the first feeder 31. Then, the signal taken out from the first feeder 31 is transmitted to the input part of the amplifier (not shown) through a conductive member that is conductively connected to the first feeder 31. As a specific example of the conductive member, a power supply line such as an AV cable or a coaxial cable can be cited. The amplifier amplifies the signal taken out from the first feeder 31, and outputs the amplified signal to a signal processing circuit (not shown) mounted on the vehicle.

[0068] When a coaxial cable is used as the power supply line, the core wire (inner conductor) of the coaxial cable is connected to the first power feeder 31, and the outer conductor of the coaxial cable is connected to the ground (body ground) of the vehicle body or a metal part conductively connected to the vehicle body. The metal part conductively connected to the vehicle body may be, for example, the reinforcing material 14. In addition, a plug for connecting the amplifier to the first power feeder 31 may be used, and the plug may be mounted on the first power feeder 31, for example. In addition, the amplifier may be mounted on the plug.

[0069] For example, the first feeder 31 is located in the first antenna conductor 30A at a position closest to the reinforcing material 14 in a plan view of the rear window glass 15. This allows the power supply line or the ground of the amplifier electrically connected to the first feeder 31 to be connected to the reinforcing material 14 as the vehicle body ground at a short distance, thereby reducing noise.

[0070] The first antenna element 32 has a first proximity portion 33 extending along the lower edge 22 at a distance D1 of 3 mm to 60 mm from the lower edge 22 (an example of the first outer edge among the upper, lower, left, and right outer edges of the defogger). Figure 2 In the example shown, the first antenna element 32 is located below the lower edge 22 of the rear window glass 15 in a plan view where the reinforcing material 14 is not present. The below corresponds to the ground side in the vehicle when the rear trunk door 100 is closed.

[0071] Here, if the first antenna element 32 is too close to the defogger 20 of the conductor, the antenna gain (AM gain) in the AM broadcast band area is likely to decrease. Therefore, the antenna that receives the radio waves in the previous AM broadcast band area can suppress the decrease in AM gain by, for example, lengthening the full length of the first antenna element 32. In addition, even if the first antenna element 32 is too close to the reinforcing material 14 of the conductor, the AM gain is likely to decrease. Therefore, the antenna that receives the radio waves in the previous AM broadcast band area can suppress the decrease in AM gain by, for example, lengthening the full length of the first antenna element 32. In addition, it is known that the AM gain of the antenna element that receives the radio waves in the AM broadcast band area can be increased by increasing the full length of the antenna element (for example, the area S1 described later). However, if the blank area outside the defogger 20 is narrow, it is sometimes difficult to extend the full length of the first antenna element 32 to the length required to suppress the decrease in AM gain.

[0072] In contrast, in the technology disclosed herein, the interval D1 is 3 mm to 60 mm, and the first antenna element 32 can be relatively far away from the defogger 20. In addition, the first antenna element 32 is located on the lower side of the rear window glass 15 where the reinforcing material 14 does not exist relative to the lower edge 22 in the top view, so the first antenna element 32 can be relatively far away from the reinforcing material 14. Therefore, even if the total length L1 of the first antenna element 32 is a relatively short length (a length of 100 mm to 1800 mm), the decrease in AM gain can be suppressed and a larger AM gain can be ensured. This total length L1 of less than 1800 mm is similar to that of, for example, Patent Document 1. Figure 3 The sum of the lengths of the disclosed lines (2860 mm) is very short, which is particularly advantageous for placing an antenna conductor capable of receiving radio waves in the AM broadcast band region in a narrow blank area around the defogger. In this way, in the technology disclosed in the present invention, it is easy to ensure both the placement area of ​​the first antenna conductor 30A and the reception sensitivity specified in the AM broadcast band region.

[0073] If the total length L1 of the first antenna element 32 is less than 100 mm, it is difficult to ensure the reception sensitivity in the AM broadcast band area. On the other hand, if the total length L1 exceeds 1800 mm, it is difficult to ensure the configuration area of ​​the first antenna conductor 30A. From the perspective of ensuring the reception sensitivity in the AM broadcast band area, the total length L1 is preferably 150 mm or more, more preferably 200 mm or more, more preferably 300 mm or more, more preferably 400 mm or more, and more preferably 800 mm or more. In addition, from the perspective of ensuring the configuration area of ​​the first antenna conductor 30A, the total length L1 is preferably 1700 mm or less, and more preferably 1600 mm or less.

[0074] From the perspective of both ensuring the configuration area of ​​the first antenna conductor 30A and ensuring the specified reception sensitivity in the AM broadcast band area, as described above, the interval D1 is preferably 3 mm or more and 60 mm or less. If the interval D1 is less than 3 mm, it is difficult to ensure the reception sensitivity in the AM broadcast band area. On the other hand, if the interval D1 exceeds 60 mm, it is difficult to ensure the configuration area of ​​the first antenna conductor 30A. From the perspective of ensuring the reception sensitivity in the AM broadcast band area, the interval D1 is preferably 10 mm or more, more preferably 20 mm or more, and more preferably 30 mm or more. In addition, from the perspective of ensuring the configuration area of ​​the first antenna conductor 30A, the interval D1 is preferably 50 mm or less, and more preferably 40 mm or less.

[0075] The first antenna element 32 is preferably arranged so as to overlap with the reinforcing material 14 in a plan view of the rear window glass 15. This allows the first antenna element 32 to be spaced relatively far from the reinforcing material 14, thereby suppressing a decrease in AM gain. In particular, from the perspective of suppressing a decrease in AM gain, the first antenna conductor 30A (i.e., the first feeder 31 and the first antenna element 32) is preferably arranged so as not to overlap with the reinforcing material 14 in a plan view of the rear window glass 15.

[0076] Figure 2 In the embodiment, if the first approaching portion 33 is spaced 3 mm to 60 mm apart from the lower edge 22 and the length A1 extending along the lower edge 22 is 100 mm or more, a larger AM gain can be ensured compared to the case where the length is less than 100 mm. Figure 2 In the example shown, the first antenna element 32 is a linear element disposed only in one peripheral region 42, and therefore the length A1 is equal to the total length L1. In addition, the length A1 is preferably 800 mm or less.

[0077] In addition, Figure 2 In the example shown, as described above, the first antenna element 32 can be located at a distance from the defogger 20 and the reinforcing material 14. Therefore, even if the antenna capacity C1 of the first antenna element 32 relative to the vehicle body ground is a small value (5pF to 30pF), a larger AM gain can be ensured. The antenna capacity C1 represents the capacity between the vehicle body ground and the first antenna element 32. If the antenna capacity required to ensure the AM gain becomes smaller, the antenna conductor required to ensure the AM gain can also become smaller. If the antenna capacity C1 is less than 5pF, it is difficult to ensure the receiving sensitivity in the AM broadcast band area. On the other hand, if the antenna capacity C1 exceeds 30pF, the area of ​​the first antenna element 32 (for example, the area S1 described later) becomes larger, and it is difficult to ensure the configuration area of ​​the first antenna conductor 30A.

[0078] In addition, Figure 2In the example shown, since the first antenna element 32 can be relatively far away from the defogger 20 and the reinforcing material 14, even if the area S1 of the linear first antenna element 32 is set to 0.0001 m 2 ~0.001m 2 The specified AM gain can be ensured even in a narrow range. Area S1 is expressed as the product of line width and line length. If area S1 is less than 0.0001m 2 If the area S1 exceeds 0.001m 2 , it is difficult to ensure the configuration area of ​​the first antenna conductor 30A. In addition, from the perspective of ensuring the reception sensitivity in the AM broadcast band area, the area S1 is preferably 0.00015 m 2 More preferably 0.0002m 2 More preferably 0.0003m 2 More preferably 0.0004 m 2 More preferably 0.0008m 2 In order to ensure the arrangement area of ​​the first antenna conductor 30A, the area S1 is preferably 0.00095 m 2 Below, more preferably 0.0009m 2 the following.

[0079] When the rear window glass 15 is laminated glass and the first antenna element 32 and other elements are enameled wires sealed in the rear window glass 15, the line width W of the first antenna element 32 and other elements can be 0.03 mm to 1 mm. If the line width W is less than 0.03 mm, there is a risk of wire breakage during manufacturing. In addition, if the line width W exceeds 1 mm, there is a risk of problems such as poor appearance.

[0080] Alternatively, when the first antenna element 32 or other elements are printed lines, the line width W may be 0.2 mm to 50 mm. If the line width W is less than 0.2 mm, there is a risk of line breakage during manufacturing. In addition, if the line width W exceeds 50 mm, there is a risk of deterioration in appearance or manufacturing defects.

[0081] Figure 3 This is a plan view schematically showing a second configuration example of a tailgate from a viewpoint inside the vehicle, with the inner panel 13 removed. By citing the above description, descriptions of the same configurations and effects as those of the above configuration example will be omitted or simplified. Figure 3 The shape of the middle reinforcement material 14 is U-shaped, which is similar to Figure 2 The composition is different.

[0082] Figure 3In the second configuration example, the reinforcing material 14 has an upper reinforcing material portion 14C connecting the upper end of the left reinforcing material portion 14A and the upper end of the right reinforcing material portion 14B. The upper reinforcing material portion 14C extends in the left-right direction (horizontal direction) in the upper region of the opening covered by the rear window glass 15. In this second configuration example, both the receiving sensitivity in the arrangement region of the first antenna conductor 30A and the AM broadcast band region can be ensured.

[0083] Figure 4 This is a plan view schematically showing a third configuration example of a tailgate from a viewpoint inside the vehicle, with the inner panel 13 removed. By citing the above description, descriptions of the same configurations and effects as those of the above configuration example will be omitted or simplified. Figure 4 The configuration is different from the above configuration in that the middle reinforcing material has a frame shape and the first antenna conductor has a ring shape.

[0084] Figure 4 In the embodiment, the reinforcing material 14 has a lower reinforcing material portion 14D connecting the lower end of the left reinforcing material portion 14A and the lower end of the right reinforcing material portion 14B. The lower reinforcing material portion 14D extends in the left-right direction (horizontal direction) in the area below the opening covered by the rear window glass 15.

[0085] Figure 4 In the embodiment, the first antenna conductor 30B corresponds to Figure 1 The first antenna conductor 30B is a modified example of the first antenna conductor 30 shown in FIG. The first antenna conductor 30B is arranged only in the peripheral region 42 below the lower edge 22 among the four peripheral regions 41 to 44. The first antenna conductor 30B includes a first feeder 31 and first annular antenna elements 34 to 37 connected to the first feeder 31 and having a total length of 100 mm to 1800 mm. In the case of an annular element, the total length is equal to the circumference of the ring. Figure 4 In the example shown, since the ring shape is a rectangle, its total length is equal to "2×L2+2×L3".

[0086] The first antenna elements 34 to 37 have a first proximity portion 33 extending along the lower edge 22 at a distance D1 of 3 mm to 60 mm from the lower edge 22 (an example of a first outer edge among the upper, lower, left, and right outer edges of the defogger). Figure 4 In the example shown, the first antenna elements 34 to 37 are located at a distance of 10 mm or more from the lower reinforcing material portion 14D of the reinforcing material 14. Figure 4 The distance in the Z-axis direction from the first antenna elements 34 to 37 (in this case, the partial element 36) to the lower reinforcing material portion 14D can be set to be 10 mm or more. Similarly, the distance between the (first) antenna conductor and the reinforcing material in other structures described later should also be considered in the Z-axis direction.

[0087] If adopted Figure 4 The interval D1 is 3mm to 60mm, so the first antenna elements 34 to 37 can be far away from the defogger 20. In addition, the first antenna elements 34 to 37 are located at a position more than 10mm away from the lower reinforcing material portion 14D of the reinforcing material 14, so the first antenna elements 34 to 37 can be far away from the reinforcing material 14. Therefore, even if the total length (circumference) of the first antenna elements 34 to 37 is a short length (a length of more than 100mm and less than 1800mm), the decrease in AM gain can be suppressed and the specified AM gain can be ensured. Therefore, Figure 4 The configuration can easily achieve both ensuring the arrangement area of ​​the first antenna conductor 30B and ensuring a predetermined reception sensitivity in the AM broadcast band area.

[0088] In addition, the ring-shaped element may have a notch in a part of the "ring". The length of the notch portion may be included in the circumference of the ring. In addition, from the perspective of ensuring the specified receiving sensitivity in the AM broadcast frequency band area, the notch portion is preferably 2 or less, and more preferably 1. From the perspective of ensuring the specified receiving sensitivity in the AM broadcast frequency band area, the width of the notch portion (notch width) is preferably 10 mm or less, and more preferably 5 mm or less.

[0089] Figure 4 In the embodiment, if the first approaching portion 33 is spaced 3 mm to 60 mm from the lower edge 22 and the length A1 extending along the lower edge 22 is greater than 100 mm, a greater AM gain can be ensured compared to the case where the length is less than 100 mm. Figure 4 In the illustrated example, the first antenna elements 34 to 37 are ring-shaped elements arranged only in one peripheral region 42 , and therefore the length A1 is equal to the line length L2 of the linear element portion 34 .

[0090] Furthermore, since the first antenna elements 34 to 37 can be located relatively far from the defogger 20 and the reinforcing material 14, even if the area S2 surrounded by the ring-shaped first antenna elements 34 to 37 is set to 0.01 m 2 ~0.05m 2 The specified AM gain can be ensured even in a narrow range. Area S2 is the area of ​​the inner side surrounded by the ring (in Figure 4 In the case of the rectangular ring shown, it is represented by L2×L3). If the area S2 is less than 0.01m 2 On the other hand, if the area S2 exceeds 0.05m 2 , it is difficult to ensure the configuration area of ​​the first antenna conductor 30B. In addition, from the perspective of ensuring the reception sensitivity in the AM broadcast band area, the area S2 is preferably 0.012 m2 More preferably 0.024m 2 above.

[0091] In addition, when the ring-shaped element has the above-mentioned notch in a part of the "ring", the area S2 is defined by assuming that the ring shape does not have the notch portion.

[0092] The shape of the annular first antenna elements 34 to 37 is a rectangle having a long side (in this case, element portions 34 and 36) extending in the horizontal direction along the lower edge 22 of the defogger 20. If the length of the short side of the rectangle (in this case, element portions 35 and 37) is less than 80 mm, it is advantageous in terms of both ensuring the configuration area of ​​the first antenna conductor 30B and ensuring the reception sensitivity in the AM broadcast band area. In addition, if the length of the long side of the rectangle is less than 3 / 4 of the length of the lower edge 22 of the defogger 20, it is advantageous in terms of ensuring the configuration area of ​​the first antenna conductor 30B.

[0093] Furthermore, if the distance between the lower edge 22 and the element portion 34 (for example, the interval D1) is 3 mm to 30 mm and the length of the short side of the rectangle is 3 mm to 50 mm, the first antenna conductor 30B can receive radio waves in both the frequency bands of AM broadcast waves and FM broadcast waves. That is, the above-mentioned configuration can make the first antenna conductor 30B a common antenna capable of receiving AM broadcast waves and FM broadcast waves.

[0094] Figure 5 This is a plan view schematically showing a fourth configuration example of a rear trunk door from a viewpoint inside the vehicle, with the inner panel 13 removed. By citing the above description, descriptions of the same configurations and effects as those of the above configuration examples will be omitted or simplified. Figure 5 The configuration is different from the above configuration in that the first antenna conductor 30B is present in a blank area between the upper left reinforcing material portion 14Ca and the upper right reinforcing material portion 14Cb.

[0095] The annular element of the first antenna conductor 30B is located at a position more than 10 mm away from the reinforcing material 14, or is located on the upper side where the reinforcing material 14 does not exist relative to the upper edge 21 of the defogger 20 in a plan view of the rear window glass 15. The annular element of the first antenna conductor 30B is arranged only in the peripheral area 41 above the upper edge 21 among the four peripheral areas 41 to 44.

[0096] The annular element has a first approach portion 33 extending along the upper edge 21 at a distance D1 of 3 mm to 60 mm from the upper edge 21 (an example of the first outer edge among the upper, lower, left and right outer edges of the defogger). Figure 5In the example shown, the annular element is located on the upper side of the rear window 15 in a plan view relative to the upper edge 21 where no reinforcement material 14 is present.

[0097] Therefore, if the Figure 5 The composition of Figure 4 The configuration is the same as that of the antenna 30B, and both ensuring the arrangement area of ​​the first antenna conductor 30B and ensuring the reception sensitivity in the AM broadcast band area can be easily achieved.

[0098] [Table 1]

[0099] [dBμV] (a) (b) (c) (d) (e) (f) AM Gain 43.0 40.0 38.0 45.0 45.0 40.0

[0100] Table 1 shows the Fig. 6A , 6B , 6C are examples of the measurement results of the AM gain of each configuration example. In Table 1,

[0101] (a): Fig. 6A (a) (total length L1: 800mm, area S1: 0.0008m 2 )

[0102] (b) Fig. 6A (b) (total length L1: 400mm, area S1: 0.0004m 2 )

[0103] (c): Figure 6B (c) (total length L1: 1600mm, area S1: 0.0016m 2 )

[0104] (d): Figure 6B (d) (total length L1: 1600mm, area S1: 0.0016m 2 )

[0105] (e) Figure 6C (e) (the area of ​​the shaded area indicating the antenna configuration area: 0.105m 2 )

[0106] (f): Figure 6C (f) (the area of ​​the shaded area indicating the antenna configuration area: 0.06m 2 )

[0107] in addition, Fig. 6A , 6B The line width of each component in is 1mm. In addition, Fig. 6A , 6B D1 in is 30 mm. In addition, Fig. 6A as well as Figure 6BIn (d), the distance between the first antenna conductors 30A, 30D and the lower reinforcing material portion 14D is 200 mm. Figure 6B In the embodiment, the distance between the first antenna conductors 30C, 30D and the left reinforcing material portion 14A and the distance between the first antenna conductors 30C, 30D and the right reinforcing material portion 14B are 10 mm to 20 mm. Figure 6B In (c), the distance between the first antenna conductor 30C and the upper reinforcing material portion is also 10 mm to 20 mm.

[0108] Figure 6B The first antenna conductor 30C of (c) is arranged in three peripheral regions, namely, left, top, and right, of the four peripheral regions, namely, top, bottom, left, and right, of the defogger. Figure 6B The first antenna conductor 30D of (d) is arranged in three peripheral regions of the left, lower and right sides among the four peripheral regions of the defogger. Figure 6C The antenna conductor 131 of (e) is an antenna for the AM band having a total length exceeding 1800 mm (comparative example). Figure 6C The antenna conductor 132 of (f) is an antenna for the AM band having a total length exceeding 1800 mm (comparative example).

[0109] According to Table 1, even if the total length of the antenna conductor of (a) to (d) is shorter (even if the area is smaller) than that of (e) and (f), the antenna gain equivalent to that of (e) and (f) can be ensured.

[0110] [Table 2]

[0111] [dBμV] (g) (h) (i) (f) AM Gain 40.0 36.0 39.5 40.0

[0112] Table 2 shows the Fig. 7A , 7B An example of the measurement results of the AM gain of each configuration example shown. Fig. 7A (g) (h) The reinforcement material is separated from the upper reinforcement material portion by the left and right sides. Fig. 6A (a) (b) of FIG. 7b (i) is different from FIG. 7b in that the reinforcing material is separated into left and right parts in the upper reinforcing material part. Fig. 6A (c) different.

[0113] in addition, Fig. 7A , 7B The line width of each component in is 1mm. In addition, Fig. 7A , 7B D1 in is 30 mm. In addition, Fig. 7A In the embodiment, the distance between the first antenna conductor 30A and the left reinforcing material portion 14A is 10 mm to 20 mm. Figure 7BIn the embodiment, the distance between the first antenna conductor 30C and the left reinforcing material portion 14A and the distance between the first antenna conductor 30C and the right reinforcing material portion 14B are 10 mm to 20 mm. Figure 7B In (i), the distance between the first antenna conductor 30C and the upper left reinforcing material portion and the upper right reinforcing material portion is also 10 mm to 20 mm.

[0114] According to Table 2, (g) to (i) with separated reinforcing materials can ensure the same antenna gain as (a) to (c) with no separated reinforcing materials. In addition, even if the total length of the antenna conductor of (g) to (i) is shorter than (f) (even if the area is narrower), the antenna gain equivalent to (f) can be ensured.

[0115] [Table 3]

[0116]

[0117] Table 3 shows Fig. 6A In the embodiment shown, an example of the measurement result of AM gain when the total length L1 of the first antenna conductor 30A is changed. According to Table 3, the longer the total length L1 is, the higher the AM gain is. If the total length L1 is greater than 100 mm, the reception sensitivity in the AM broadcast band area can be ensured. In addition, Fig. 6A The line width of each component in is 1mm. In addition, Fig. 6A D1 in is 30 mm. In addition, Fig. 6A In the embodiment, the distance between the first antenna conductor 30A and the lower reinforcing material portion 14D is 200 mm.

[0118] [Table 4]

[0119] [dBμV] (a) (b) (c) (d) (e) AM Gain 43.0 42.0 45.0 44.0 47.0

[0120] Table 4 shows an example of the measurement results of the AM gain when the total length and area are changed for the linear first antenna conductor 30A and the loop-shaped first antenna conductor 30B.

[0121] (a): Fig. 6A (Total length L1: 800mm, area S1: 0.0008m 2 )

[0122] (b) Figure 4 (Line length L2: 400mm, Line length L3: 30mm, Area S2: 0.012m 2 )

[0123] (c): Figure 4 (Line length L2: 800mm, Line length L3: 30mm, Area S2: 0.024m 2 )

[0124] (d): Figure 4 (Line length L2: 400mm, Line length L3: 60mm, Area S2: 0.024m 2 )

[0125] (e) Figure 4 (Line length L2: 800mm, Line length L3: 60mm, Area S2: 0.048m 2 ).

[0126] According to Table 4, the larger the area of ​​the first antenna conductor and the longer the line length L2, the higher the AM gain. Fig. 6A The line width of the components in is 1mm. In addition, Fig. 6A , Figure 4 D1 in is 30 mm. In addition, Fig. 6A , Figure 4 In the embodiment, the distance between the first antenna conductors 30A, 30B and the lower reinforcing material portion 14D is 200 mm.

[0127] [Table 5]

[0128]

[0129] Table 5 shows the three types with different total length and area. Fig. 6A In the form shown, an example of the measurement results of AM gain when the interval D1 between the defogger and the first antenna conductor 30A is changed to 30mm, 15mm, and 10mm. In Table 5, the line length L1 represents the length of the first approach portion 33 extending along the defogger, and the area S1 represents the area of ​​the first antenna conductor 30A. The larger the interval D1 and the longer the length of the first approach portion 33 extending along the defogger, the higher the AM gain. In addition, Fig. 6A The line width of each component in is 1mm. In addition, Fig. 6A In the embodiment, the distance between the first antenna conductor 30A and the lower reinforcing material portion 14D is 200 mm.

[0130] [Table 6]

[0131] [dBμV] (a) (b) (c) (d) AM Gain 43.0 44.0 44.0 38.0

[0132] Table 6 shows the Fig. 8A , 8B An example of the measurement results of the AM gain of each configuration example shown in Table 6.

[0133] (a): Fig. 8A (a) (total length L1: 800mm, area S1: 0.0008m 2 )

[0134] (b) Fig. 8A(b) (total length L1: 1200mm, area S1: 0.0012m 2 )

[0135] (c): Figure 8B (c) (total length L1: 1200mm, area S1: 0.0012m 2 )

[0136] (d): Figure 8B (d) (total length L1: 1600mm, area S1: 0.0016m 2 ).

[0137] in addition, Fig. 8A , 8B The line width of each component in is 1mm. In addition, Fig. 8A , 8B D1 in is 30 mm. In addition, Fig. 8A as well as Figure 8B In (c), the distance between the first antenna conductors 30A, 30E, and 30F and the lower reinforcing material portion 14D is 200 mm. Fig. 8A , 8B In the embodiment, the distance between the second approaching portion 39 and the right reinforcing material portion 14B and the distance between the second approaching portion 39 and the left reinforcing material portion 14A are 10 mm to 20 mm. Figure 8B In (d), the distance between the first approaching portion 33 and the upper reinforcing material portion is also 10 mm to 20 mm.

[0138] Fig. 8A The first antenna conductor 30A shown in (a) is arranged only in one peripheral region at the bottom among four peripheral regions of the defogger, namely, the upper, lower, left, and right regions. Fig. 8A The first antenna conductor 30E shown in (b) is arranged only in two peripheral regions adjacent to the lower side and the right side among the four peripheral regions of the defogger, namely, the upper, lower, left and right sides. Figure 8B The first antenna conductor 30F shown in (c) is arranged only in two peripheral regions adjacent to the left and the bottom among the four peripheral regions of the defogger, namely, the upper, lower, left and right regions. Figure 8B The first antenna conductor 30C shown in (d) is arranged only in three peripheral regions, namely, left, top, and right, among the four peripheral regions, namely, top, bottom, left, and right, of the defogger.

[0139] Fig. 8AThe first antenna conductor 30E of (b) has a first feeder 31 and an L-shaped first antenna element 32 connected to the first feeder 31. The first antenna element 32 has a first proximity portion 33 extending along the lower edge 22 at an interval of 3 mm to 60 mm relative to the lower edge 22 of the defogger 20, and a second proximity portion 39 extending along the right edge 24 at an interval of 10 mm to 40 mm relative to the right edge 24 of the defogger 20. In the first antenna conductor 30E, the first proximity portion 33 is arranged in an area below the defogger 20, and the second proximity portion 39 is arranged in an area to the right of the defogger 20. The right edge 24 is an example of a second outer edge connected to the first outer edge among the upper, lower, left and right outer edges of the defogger.

[0140] Figure 8B The first antenna conductor 30F of (c) has a first feeder 31 and an L-shaped first antenna element 32 connected to the first feeder 31. The first antenna element 32 has a first proximity portion 33 extending along the lower edge 22 at an interval of 3 mm to 60 mm relative to the lower edge 22 of the defogger 20, and a second proximity portion 39 extending along the left edge 23 at an interval of 10 mm to 40 mm relative to the left edge 23 of the defogger 20. In the first antenna conductor 30F, the first proximity portion 33 is arranged in an area below the defogger 20, and the second proximity portion 39 is arranged in an area to the left of the defogger 20. The left edge 23 is an example of a second outer edge connected to the first outer edge among the upper, lower, left and right outer edges of the defogger.

[0141] Figure 8B The first antenna conductor 30C of (d) has a first feeder 31 and a U-shaped first antenna element 32 connected to the first feeder 31. The first antenna element 32 has a first proximity portion 33 extending along the upper edge 21 at an interval of 3 mm to 60 mm relative to the upper edge 21 of the defogger 20, and a second proximity portion 39 extending along the left edge 23 and the right edge 24 at an interval of 10 mm to 40 mm relative to the left edge 23 and the right edge 24 of the defogger 20. In the first antenna conductor 30C, the first proximity portion 33 is arranged in an area above the defogger 20, and the second proximity portion 39 is arranged in an area to the left and the right of the defogger 20.

[0142] According to Table 6, even if the total length of the antenna conductor of (a) is shorter than that of (b) and (c) (even if the area S1 is narrower), the same AM gain as (b) and (c) can be ensured. In addition, compared with (d), the length of (a) to (c) close to the reinforcement material is shorter, so the AM gain is improved.

[0143] Fig. 9This is a plan view schematically showing a fifth configuration example of a rear trunk door from a viewpoint inside the vehicle, with the inner panel 13 removed. By citing the above description, descriptions of the same configurations and effects as those of the above configuration examples will be omitted or simplified. Fig. 9 The center rear window glass 15 further includes a second antenna conductor and a T-shaped element, and is different from the above-mentioned configuration in these two points.

[0144] The second antenna conductor 50A is shaped and sized to receive radio waves in the frequency band of FM broadcast waves (e.g., 76 MHz to 95 MHz). The second antenna conductor 50A has a second feeder 51 electrically connected to the defogger 20 (e.g., a bus bar formed on the left edge 23). Fig. 9 In the example shown, the second feeder 51 is connected to the lower end of the bus bar formed at the left edge 23 of the defogger 20 via the connecting element 52. In addition, the shape and size of the second antenna conductor 50A are formed to be able to receive a frequency band (FM broadcast wave band) (including a frequency band of American standards) as an FM broadcast wave, for example, a radio wave of 76MHz to 108MHz. In addition, if the second antenna conductor 50A is designed to receive only the FM broadcast wave band, it is sufficient as long as it does not contact the reinforcing material, preferably at least 1mm from the reinforcing material, and more preferably at least 3mm from the reinforcing material.

[0145] The T-shaped element has a vertical element 53 that vertically penetrates a plurality of electric heating wires extending in the horizontal direction in the defogger 20, and a horizontal element 54 that extends in the left-right direction (horizontal direction) in the peripheral area 41 above the upper edge 21 of the defogger 20. The vertical element 53 extends downward from the middle portion of the horizontal element 54 and intersects with the plurality of electric heating wires in the defogger 20. In addition, if the T-shaped element is designed so that the second antenna conductor 50A can only receive the FM broadcast wave band, it is sufficient as long as it does not touch the reinforcing material, preferably at least 1 mm away from the reinforcing material, and more preferably at least 3 mm away from the reinforcing material.

[0146] If adopted Fig. 9 According to the configuration, a signal in the AM broadcast band region that can be received by the first antenna conductor 30A can be taken out from the first power feeder 31. Also, a signal of an FM broadcast wave that can be received by the second antenna conductor 50A can be taken out from the second power feeder 51. Fig. 9 In the structure, the T-shaped element is provided to improve the receiving sensitivity of the FM broadcast band.

[0147] [Table 7]

[0148]

[0149] Table 7 shows the Fig. 9An example of the measurement results of the FM gain and frequency characteristics of the configuration example shown. FM gain refers to the value obtained by averaging the antenna gain in the FM broadcast wave band. The frequency characteristic [AVE-MIN] represents the difference between the value (AVE) obtained by averaging the FM gain in each frequency from 76 MHz to 108 MHz, which is the FM broadcast band area, and the minimum value (MIN) among the FM gains in each frequency from 76 MHz to 108 MHz. According to Table 7, the necessary FM gain and frequency characteristics can be ensured for horizontally polarized waves and vertically polarized waves. In addition, the FM gain and frequency characteristics [AVE-MIN] in the tables described later are also values ​​based on the frequency band from 76 MHz to 108 MHz.

[0150] In addition, when measuring Table 7, Fig. 9 The dimensions of the parts shown are,

[0151] Vertical width of demister 20: about 300 mm

[0152] Transverse width of demister 20: about 1040 mm

[0153] The distance between the multiple heating wires in the demister 20: 30 mm

[0154] Length of horizontal element 54: 600 mm

[0155] The distance between the horizontal element 54 and the upper edge 21: 50 mm

[0156] Length of vertical element 53: 350 mm

[0157] Length of connecting element 52: 40 mm

[0158] Length of the busbar extending from the left edge 23 and the right edge 24 of the demister 20: 280 mm

[0159] The width of the busbars extending from the left edge 23 and the right edge 24 of the demister 20 is 10 to 15 mm.

[0160] Interval between the horizontal element 54 and the upper reinforcing material portion 14C: 45 mm

[0161] The gap between the second power feeder 51 and the left reinforcing material portion 14A: 15 mm

[0162] Fig. 10A This is a plan view schematically showing the sixth configuration example of the tailgate from the viewpoint of the vehicle interior, with the inner panel 13 removed. By citing the above description, the description of the same configuration and effects as those of the above configuration example will be omitted or simplified. Fig. 10A The center rear window glass 15 is different from the above-mentioned configuration in that it includes a second antenna conductor 50B.

[0163] The second antenna conductor 50B is shaped and sized to receive radio waves in the FM broadcast band. The second antenna conductor 50B includes a second feeder 51 connected to or close to the defogger 20, and a second antenna element 55 disposed at a distance D2 of 1 mm to 40 mm from the defogger 20. Fig. 10A In the example shown, the second feeder 51 is close to the lower end of the left edge 23 of the defogger 20, and the second antenna element 55 extends from the left edge 23 and the upper edge 21 of the defogger 20 at a spacing D2 of 1 mm to 40 mm, respectively, along the left edge 23 and the upper edge 21. In addition, the second antenna element 55 extends from the second feeder 51 through the left peripheral area 43 of the two peripheral areas 43 and 44 located outside the defogger 20, to the peripheral area 41 above the upper edge 21 of the defogger 20. In addition, if the second antenna conductor 50B is designed to receive only the FM broadcast wave band, it is sufficient as long as it does not touch the reinforcing material, preferably at least 1 mm from the reinforcing material, and more preferably at least 3 mm from the reinforcing material.

[0164] If adopted Fig. 10A According to the configuration, a signal in the AM broadcast band region received by the first antenna conductor 30A can be taken out from the first power feeder 31. In addition, a signal in the FM broadcast band region received by the second antenna conductor 50B can be taken out from the second power feeder 51. Thus, by providing the second antenna element 55, the reception sensitivity in the FM broadcast band region is improved.

[0165] From the perspective of improving the reception sensitivity in the FM broadcast band area, the total length of the second antenna element 55 is preferably 200 mm to 1400 mm, more preferably 300 mm to 1200 mm. In addition, from the perspective of improving the reception sensitivity of FM broadcast waves, the interval D2 is preferably greater than 0 mm and less than 40 mm, more preferably 3 mm to 20 mm.

[0166] Fig. 10B It shows that for horizontally polarized waves Fig. 10A An example of the measurement results of the FM gain at each frequency of the configuration example shown. Fig. 10C The vertically polarized wave Fig. 10A An example of the measurement results of the FM gain at each frequency of the configuration example shown. Fig. 10B , 10C , the necessary FM gain and frequency characteristics can be ensured. In addition, the second antenna conductor 50B is arranged at a distance of 20 mm to 30 mm from the reinforcing material. Fig. 10B , 10C The case where the total length of the second antenna element 55 is 400 mm, D2 is 3 mm, L1 is 1000 mm, and D1 is 40 mm is shown.

[0167] [Table 8]

[0168]

[0169] Table 8 shows Fig. 10A In the configuration example shown, an example of the measurement results of FM gain and frequency characteristics when the total length of the second antenna element 55 is changed to 1000mm, 700mm, and 400mm. In this case, the interval D2 is set to 3mm. According to Table 8, the required FM gain and frequency characteristics can be ensured for horizontally polarized waves and vertically polarized waves.

[0170] [Table 9]

[0171]

[0172] Table 9 shows Fig. 10A In the configuration example shown, an example of the measurement results of FM gain and frequency characteristics when the interval is changed to 3mm, 10mm, and 20mm. In this case, the total length of the second antenna element 55 is set to 400mm. According to Table 9, the required FM gain and frequency characteristics can be ensured for horizontally polarized waves and vertically polarized waves.

[0173] Fig.11 This is a plan view schematically showing the seventh configuration example of the tailgate from the viewpoint of the vehicle interior, with the inner panel 13 removed. By citing the above description, the description of the same configuration and effects as those of the above configuration example will be omitted or simplified. Fig.11 The second feeder 51 is connected to the defogger 20 via the connecting element 52. Fig. 10A The composition is different. Fig.11 In the illustrated example, the second antenna conductor 50C has a second feeder 51 connected to the lower end portion of the left edge 23 of the defogger 20 via a connecting element 52 .

[0174] If adopted Fig.11 According to the configuration, a signal in the AM broadcast band region that can be received by the first antenna conductor 30A can be taken out from the first feeder 31. In addition, a signal in the FM broadcast band region that can be received by the second antenna conductor 50C can be taken out from the second feeder 51. By providing the second antenna element 55, the reception sensitivity in the FM broadcast band region is improved.

[0175] Fig.12 This is a plan view schematically showing an eighth configuration example of a rear trunk door from a viewpoint inside the vehicle, with the inner panel 13 removed. By citing the above description, descriptions of the same configurations and effects as those of the above configuration examples will be omitted or simplified. Fig.12 The center rear window glass 15 is different from the above-described configuration in that it further includes a third antenna conductor 60A.

[0176] The second antenna conductor 50A and the third antenna conductor 60A are shaped and sized to receive radio waves in the FM broadcast band. The second antenna conductor 50A has a second feeder 51 connected to the defogger 20. The third antenna conductor 60A has a third feeder 61 connected to or close to the defogger 20, and a third antenna element 65 disposed at a distance D2 of 1 mm to 40 mm from the defogger 20.

[0177] exist Fig.12 In the example shown, the third feeder 61 is close to the lower end of the right edge 24 of the defogger 20, and the third antenna element 65 extends from the right edge 24 of the defogger 20 at a distance D2 of 1 mm to 40 mm along the right edge 24. The third antenna element 65 extends from the third feeder 61 in the area on the opposite side to the side where the second feeder 51 is located in the two left and right peripheral areas located outside the defogger 20 (in this case, the peripheral area 44 on the right side). In addition, if the third antenna conductor 60A is designed to receive only the FM broadcast wave band, it is sufficient as long as it does not touch the reinforcing material, preferably at least 1 mm from the reinforcing material, and more preferably at least 3 mm from the reinforcing material.

[0178] If adopted Fig.12 With the configuration, a signal in the AM broadcast band region that can be received by the first antenna conductor 30A can be taken out from the first feeder 31. Furthermore, a signal in the FM broadcast band region that can be received by the second antenna conductor 50A can be taken out from the second feeder 51, and a signal in the FM broadcast band region that can be received by the third antenna conductor 60A can be taken out from the third feeder 61. The second antenna conductor 50A and the third antenna conductor 60A can realize a diversity antenna that receives radio waves in the FM broadcast band region.

[0179] From the viewpoint of improving the reception sensitivity in the FM broadcast band, the total length of the third antenna element 65 is preferably not less than 100 mm and not more than 1400 mm, and more preferably not less than 100 mm and not more than 700 mm.

[0180] [Table 10]

[0181]

[0182] Table 10 shows the Fig.12 An example of the measurement results of the FM gain and frequency characteristics of the configuration example shown in Table 10. According to Table 10, the second antenna conductor 50A and the third antenna conductor 60A can both ensure the required FM gain and frequency characteristics for the horizontally polarized wave and the vertically polarized wave.

[0183] In addition, when measuring Table 10, Fig.12The dimensions of the parts shown are,

[0184] Vertical width of demister 20: about 300 mm

[0185] Transverse width of demister 20: about 1040 mm

[0186] The distance between the multiple heating wires in the defogger 20: 30mm

[0187] Length of connecting element 52: 40 mm

[0188] Length of the third antenna element 65: 300 mm

[0189] Interval D2: 5mm

[0190] Length of the busbar extending from the left edge 23 and the right edge 24 of the demister 20: 280 mm

[0191] The width of the busbars extending from the left edge 23 and the right edge 24 of the demister 20 is 10 to 15 mm.

[0192] The distance between the third antenna element 65 and the right reinforcing material portion 14B: 10 to 30 mm

[0193] The gap between the second power feeder 51 and the left reinforcing material portion 14A: 15 mm

[0194] [Table 11]

[0195]

[0196] Table 11 shows the Fig.12 The configuration example shown is an example of the measurement results of the FM gain and frequency characteristics for the horizontally polarized wave when the total length of the third antenna element 65 of the third antenna conductor 60A is changed to 500 mm, 300 mm, and 100 mm. According to Table 11, both the second antenna conductor 50A and the third antenna conductor 60A can ensure the necessary FM gain and frequency characteristics for the horizontally polarized wave.

[0197] [Table 12]

[0198]

[0199] Table 12 shows the Fig.12 The configuration example shown is an example of the measurement results of the FM gain and frequency characteristics for the vertically polarized wave when the total length of the third antenna element 65 of the third antenna conductor 60A is changed to 500 mm, 300 mm, and 100 mm. According to Table 12, both the second antenna conductor 50A and the third antenna conductor 60A can ensure the necessary FM gain and frequency characteristics for the vertically polarized wave.

[0200] In addition, when measuring Tables 11 and 12, Fig.12 The dimensions of the parts shown are,

[0201] Vertical width of demister 20: about 300 mm

[0202] Transverse width of demister 20: about 1040 mm

[0203] The distance between the multiple heating wires in the demister 20: 30 mm

[0204] Length of connecting element 52: 40 mm

[0205] Interval D2: 5mm

[0206] Length of the busbar extending from the left edge 23 and the right edge 24 of the demister 20: 280 mm

[0207] The width of the busbars extending from the left edge 23 and the right edge 24 of the demister 20 is 10 to 15 mm.

[0208] The distance between the third antenna element 65 and the right reinforcing material portion 14B: 10 to 30 mm

[0209] The gap between the second power feeder 51 and the left reinforcing material portion 14A: 15 mm

[0210] Fig.13 This is a plan view schematically showing a ninth configuration example of a rear trunk door from a viewpoint inside the vehicle, with the inner panel 13 removed. By citing the above description, descriptions of the same configurations and effects as those of the above configuration examples will be omitted or simplified. Fig.13 The configuration is different from the above configuration in that a second antenna conductor 50D is included.

[0211] The second antenna conductor 50D and the third antenna conductor 60A are both formed to be able to receive radio waves in the VHF (Very High Frequency) band with a frequency of 30 MHz to 300 MHz. The VHF band radio waves include FM broadcast band waves, DAB standard band III (174 MHz to

[0212] 240MHz) radio waves, etc. The radio waves of Band III of the DAB standard are vertically polarized waves. For example, the second antenna conductor 50D and the third antenna conductor 60A are both formed in a shape and size to be a common antenna capable of receiving radio waves of both FM broadcast waves and DAB Band III frequency bands. The second antenna conductor 50D has a second feeding portion 51 connected to or close to the defogger 20, and a second antenna element 55 arranged at an interval D2 of 1mm to 40mm from the defogger 20. The third antenna conductor 60A has a third feeding portion 61 connected to or close to the defogger 20, and a third antenna element 65 arranged at an interval D2 of 1mm to 40mm from the defogger 20. In addition, Fig.13 The illustrated configuration includes the connection element 52, but whether the connection element 52 is required is optional, so the second antenna element 55 is sufficient, and the connection element 52 may not be present. When the second antenna conductor 50D includes the connection element 52, the length of the connection element 52 can be adjusted to about 5 mm to 10 mm.

[0213] The second antenna conductor 50D and the third antenna conductor 60A are both formed to be able to receive radio waves in both the VHF (Very High Frequency) band of 30MHz to 300MHz and the UHF (Ultra High Frequency) band of 300MHz to 3GHz. The radio waves in the UHF band include terrestrial digital television broadcast waves of 470MHz to 720MHz. Terrestrial digital television broadcast waves are horizontally polarized waves. For example, the shape and size of the second antenna conductor 50D and the third antenna conductor 60A can also be formed as a common antenna that can receive radio waves in both frequency bands of FM broadcast waves and terrestrial digital television broadcast waves.

[0214] If adopted Fig.13 With the structure, the second antenna conductor 50D and the third antenna conductor 60A can realize a diversity antenna that receives radio waves in at least one frequency band among FM broadcast waves, DAB band III, and terrestrial digital television broadcast waves.

[0215] Fig.14 The tenth configuration example is schematically shown in a plan view from the viewpoint of the vehicle interior, in which the inner panel 13 is removed. The above description is cited, and the description of the same configuration and effects as those of the above configuration example is omitted or simplified. Fig.14 The configuration described above is different in that a fourth antenna conductor 70A and a fifth antenna conductor 70B are provided.

[0216] Fig.14The shape and size of the first antenna conductor 30C are designed to be able to receive radio waves in at least the AM broadcast band. The first antenna conductor 30C includes a first feeder 31 and a first antenna element 32 connected to the first feeder 31 and having a total length of 100 mm to 1800 mm. Fig.14 In the illustrated example, the first antenna element 32 includes a linear element and a loop element that shares a portion of the linear element.

[0217] The fourth antenna conductor 70A and the fifth antenna conductor 70B are conductors capable of receiving radio waves in at least one frequency band among FM broadcast waves, DAB band III, and terrestrial digital television broadcast waves. The fourth antenna conductor 70A and the fifth antenna conductor 70B each have a fourth feeder and a fourth antenna element connected to the fourth feeder. Fig.14 In the example shown, the fourth antenna conductor 70A and the fifth antenna conductor 70B are designed in shape and size to receive radio waves in the frequency band of terrestrial digital television broadcast waves. The fourth antenna conductor 70A and the fifth antenna conductor 70B can realize a diversity antenna for receiving terrestrial digital television broadcast waves.

[0218] Fig.15 This is a plan view schematically showing the eleventh configuration example of the tailgate from the viewpoint of the vehicle interior, with the inner panel 13 removed. By citing the above description, the description of the same configuration and effects as those of the above configuration example will be omitted or simplified. Fig.15 The configuration is different from the above configuration in that a fourth antenna conductor 70C and a fifth antenna conductor 70B are provided. Fig.15 The first antenna conductor 30B is shown with Figure 4 The shown configuration is the same.

[0219] Fig.15 In the embodiment, the fourth antenna conductor 70C is a conductor capable of receiving radio waves in at least one frequency band among FM broadcast waves, DAB bands III and II, and terrestrial digital television broadcast waves. Fig.15 In the example shown, the fourth antenna conductor 70C is designed in shape and size to be able to receive radio waves in the frequency band of terrestrial digital television broadcast waves. The fourth antenna conductor 70C and the fifth antenna conductor 70B can realize a diversity antenna for receiving terrestrial digital television broadcast waves.

[0220] [Table 13]

[0221]

[0222] Table 13 shows the Figure 4In the embodiment shown in the figure (where the lower reinforcing material portion 14D is not provided), the first antenna conductor 30B is formed as a common antenna capable of receiving radio waves in the AM broadcast band and the FM broadcast band. Here, L2 = 800 mm, L3 = 10 mm, and D1 = 20 mm. According to Table 13, the required FM gain and frequency characteristics can be ensured for the horizontally polarized wave and the vertically polarized wave. At this time, an AM gain of 47 dBμV can be obtained, and the required AM gain can be ensured.

[0223] [Table 14]

[0224]

[0225] Table 14 shows the Figure 4 In the embodiment shown in the figure (where the lower reinforcing material portion 14D is not provided), the first antenna conductor 30B is formed as a common antenna capable of receiving radio waves in the AM broadcast band and the FM broadcast band. In this case, the length of the loop of the first antenna conductor 30B is changed. According to Table 14, any loop length within the range of 400 mm to 900 mm can ensure the necessary FM gain and frequency characteristics for vertically polarized waves and horizontally polarized waves.

[0226] Fig.16 This is a plan view schematically showing the twelfth configuration example of the tailgate from the viewpoint of the vehicle interior, with the inner panel 13 removed. By citing the above description, the description of the same configuration and effects as those of the above configuration example will be omitted or simplified. Fig.16 The configuration described above is different in that a first antenna conductor 30G capable of receiving radio waves in the AM broadcast band is provided.

[0227] The first antenna conductor 30G further includes a linear element 38 directly or indirectly connected to the loop-shaped first antenna elements 34 to 37 . The linear element 38 may be connected to the first antenna elements 34 to 37 or may be connected to the first power feeder 31 . Fig.16 The shape of the linear element 38 shown is L-shaped, but is not limited thereto. The linear element 38 has a linear portion extending along the long side (in this case, the element portion 36) of the rectangle formed by the first antenna elements 34 to 37 on the side opposite to the defogger 20. The linear portion extends in the left-right direction (horizontal direction) in a region below the element portion 36.

[0228] Furthermore, if the distance between the lower edge 22 and the element portion 34 (for example, the interval D1) is 3 mm to 30 mm and the length of the short side of the rectangle is 3 mm to 50 mm, the first antenna conductor 30G can receive radio waves in both the AM broadcast band and the FM broadcast band. That is, the first antenna conductor 30G can be made into a common antenna capable of receiving radio waves in both the AM broadcast band and the FM broadcast band.

[0229] [Table 15]

[0230]

[0231] Table 15 shows Fig.16 In the embodiment shown, the first antenna conductor 30G is formed as a common antenna capable of receiving radio waves in both the AM broadcast band area and the FM broadcast band area. This is an example of the measurement results of the FM gain and frequency characteristics. At this time, L2 = 500mm, L3 = 10mm, L4 = 800mm, D1 = 5mm, and the interval between the first antenna element 36 and the linear element 38 = 10mm. According to Table 15, the required FM gain and frequency characteristics can be ensured for the horizontally polarized wave and the vertically polarized wave. At this time, an AM gain of 44dBμV can be obtained, and the required AM gain can be ensured.

[0232] [Table 16]

[0233]

[0234] Table 16 shows Fig.16 In the form shown, the first antenna conductor 30G is formed as a common antenna capable of receiving radio waves in both the AM broadcast band area and the FM broadcast band area. This is an example of the measurement results of the FM gain and frequency characteristics. At this time, the length of the loop of the first antenna conductor 30G is changed. Specifically, D1 = 5mm, L3 = 10mm, the interval between the first antenna element 36 and the linear element 38 = 10mm (fixed), and the value of L2 is adjusted to 300mm to 900mm. According to Table 16, any loop length within 300mm to 900mm can ensure the necessary FM gain and frequency characteristics for vertically polarized waves and horizontally polarized waves.

[0235] [Table 17]

[0236]

[0237] Table 17 shows Fig.16In the embodiment shown, the first antenna conductor 30G is formed as a common antenna capable of receiving radio waves in the AM broadcast band area and the FM broadcast band area. This is an example of the measurement results of the FM gain and frequency characteristics. At this time, the interval D1 is changed. According to Table 17, any interval D1 within 5 mm to 20 mm can ensure the necessary FM gain and frequency characteristics for vertically polarized waves and horizontally polarized waves.

[0238] In addition, when measuring Table 17, Fig.16 The dimensions of the parts shown are,

[0239] Vertical width of demister 20: about 300 mm

[0240] Transverse width of demister 20: about 1040 mm

[0241] The distance between the multiple heating wires in the defogger 20: 30mm

[0242] L2: 500mm

[0243] L3: 10mm

[0244] L4: 800mm

[0245] The distance between the first antenna element 36 and the linear element 38 = 10 mm

[0246] Length of the busbar extending from the left edge 23 and the right edge 24 of the demister 20: 280 mm

[0247] The width of the busbars extending from the left edge 23 and the right edge 24 of the demister 20 is 10 to 15 mm.

[0248] Fig.17 This is a plan view schematically showing the thirteenth configuration example of the tailgate from the viewpoint of the vehicle interior, with the inner panel 13 removed. By citing the above description, the description of the same configuration and effects as those of the above configuration example will be omitted or simplified. Fig.17 The configuration is different from the above configuration in that a third antenna conductor 60A is provided.

[0249] The first antenna conductor 30G is a common antenna capable of receiving radio waves in the AM broadcast band and the FM broadcast band, and the third antenna conductor 60A is an antenna capable of receiving radio waves in the FM broadcast band.

[0250] [Table 18]

[0251]

[0252] Table 18 shows the Fig.17An example of the measurement results of FM gain and frequency characteristics of the form shown in Table 18. According to Table 18, both the first antenna conductor 30G and the third antenna conductor 60A can ensure the necessary FM gain and frequency characteristics for vertically polarized waves. Therefore, the first antenna conductor 30G and the third antenna conductor 60A can realize a diversity antenna that receives radio waves in the FM broadcast band area.

[0253] In addition, when measuring Table 18, Fig.17 The dimensions of the parts shown are,

[0254] Vertical width of demister 20: about 300 mm

[0255] Transverse width of demister 20: about 1040 mm

[0256] The distance between the multiple heating wires in the defogger 20: 30mm

[0257] L2: 500mm

[0258] L3: 10mm

[0259] L4: 800mm

[0260] The distance between the first antenna element 36 and the linear element 38 = 10 mm

[0261] Length of the third antenna element 65: 350 mm

[0262] Interval D1: 5mm

[0263] Interval D2: 5mm

[0264] Length of the busbar extending from the left edge 23 and the right edge 24 of the demister 20: 280 mm

[0265] The width of the busbars extending from the left edge 23 and the right edge 24 of the demister 20 is 10 to 15 mm.

[0266] The distance between the third antenna element 65 and the right reinforcing material portion 14B: 10 to 30 mm

[0267] [Table 19]

[0268]

[0269] Table 19 shows Fig.17An example of the measurement results of FM gain and frequency characteristics when the total length of the third antenna element 65 of the third antenna conductor 60A is changed in the embodiment shown in FIG. According to Table 19, for either the first antenna conductor 30G or the third antenna conductor 60A, as long as the total length of the third antenna element 65 is within the length range of 150 mm to 550 mm, the required FM gain and frequency characteristics can be ensured for horizontally polarized waves.

[0270] [Table 20]

[0271]

[0272] Table 20 shows Fig.17 An example of the measurement results of FM gain and frequency characteristics when the total length of the third antenna element 65 of the third antenna conductor 60A is changed in the embodiment shown in Table 20. According to Table 20, for either the first antenna conductor 30G or the third antenna conductor 60A, as long as the total length of the third antenna element 65 is within the length range of 150 mm to 550 mm, the required FM gain and frequency characteristics can be ensured for vertically polarized waves.

[0273] In addition, when measuring Tables 19 and 20, Fig.17 The dimensions of the parts shown are,

[0274] Vertical width of demister 20: about 300 mm

[0275] Transverse width of demister 20: about 1040 mm

[0276] The distance between the multiple heating wires in the demister 20: 30 mm

[0277] L2: 500mm

[0278] L3: 10mm

[0279] L4: 800mm

[0280] The distance between the first antenna element 36 and the linear element 38 = 10 mm

[0281] Interval D1: 5mm

[0282] Interval D2: 5mm

[0283] Length of the busbar extending from the left edge 23 and the right edge 24 of the demister 20: 280 mm

[0284] The width of the busbars extending from the left edge 23 and the right edge 24 of the demister 20 is 10 to 15 mm.

[0285] The distance between the third antenna element 65 and the right reinforcing material portion 14B: 10 to 30 mm

[0286] [Table 21]

[0287]

[0288] Table 21 shows Fig.17 In the embodiment shown, an example of the measurement results of FM gain and frequency characteristics when the interval D2 between the third antenna conductor 60A and the defogger 20 is changed. According to Table 21, for either the first antenna conductor 30G or the third antenna conductor 60A, as long as the interval D2 is within the length of 5 mm to 20 mm, the required FM gain and frequency characteristics can be ensured for horizontally polarized waves.

[0289] [Table 22]

[0290]

[0291] Table 22 shows Fig.17 In the embodiment shown, an example of the measurement results of FM gain and frequency characteristics when the interval D2 between the third antenna conductor 60A and the defogger 20 is changed. According to Table 22, for either the first antenna conductor 30G or the third antenna conductor 60A, as long as the interval D2 is within the length of 5 mm to 20 mm, the required FM gain and frequency characteristics can be ensured for vertically polarized waves.

[0292] In addition, when measuring Tables 21 and 22, Fig.17 The dimensions of the parts shown are,

[0293] Vertical width of demister 20: about 300 mm

[0294] Transverse width of demister 20: about 1040 mm

[0295] The distance between the multiple heating wires in the demister 20: 30 mm

[0296] L2: 500mm

[0297] L3: 10mm

[0298] L4: 800mm

[0299] The distance between the first antenna element 36 and the linear element 38 = 10 mm

[0300] Interval D1: 5mm

[0301] Length of the third antenna element 65: 350 mm

[0302] Length of the busbar extending from the left edge 23 and the right edge 24 of the demister 20: 280 mm

[0303] The width of the busbars extending from the left edge 23 and the right edge 24 of the demister 20 is 10 to 15 mm.

[0304] The distance between the third antenna element 65 and the right reinforcing material portion 14B: 10 to 30 mm

[0305] Fig.18 This is a plan view schematically showing the fourteenth configuration example of the tailgate from the viewpoint of the vehicle interior, with the inner panel 13 removed. By citing the above description, the description of the same configuration and effects as those of the above configuration example will be omitted or simplified. Fig.18 The configuration is different from the above configuration in that it includes a first antenna conductor 30H capable of receiving radio waves in the AM broadcast band.

[0306] The first antenna conductor 30H further includes a linear element 38 directly or indirectly connected to the linear first antenna element 32 . The linear element 38 may be connected to the first antenna element 32 or to the first power feeder 31 . Fig.18 The shape of the linear element 38 shown is L-shaped, but is not limited thereto. The linear element 38 has a linear portion extending along the first antenna element 32 on the opposite side of the defogger 20 relative to the first antenna element 32. The linear portion extends in the left-right direction (horizontal direction) in a region below the first antenna element 32.

[0307] The first antenna conductor 30H is a common antenna capable of receiving radio waves in the AM broadcast band and the FM broadcast band, and the third antenna conductor 60A is an antenna capable of receiving radio waves in the FM broadcast band and DAB band III. Therefore, the first antenna conductor 30H and the third antenna conductor 60A can realize a diversity antenna that receives radio waves in the FM broadcast band.

[0308] in addition, Fig.18 In the embodiment, one or more antenna conductors capable of receiving terrestrial digital television broadcast waves may be formed in the area below the first antenna conductor 30H (e.g., the rear window glass 15, the outer panel 12, or the inner panel 13). A plurality of antenna conductors capable of receiving terrestrial digital television broadcast waves may also be arranged in the peripheral areas 41 and 42, respectively.

[0309] Although the rear trunk door and the rear window glass are described above by using the embodiments, the present invention is not limited to the above-mentioned embodiments, and various modifications and improvements such as partial or complete combination or replacement with other embodiments are possible within the scope of the present invention.

[0310] For example, the "end" of an element can be the starting point or end point of the extension of the element, or it can be near the starting point or end point of the conductor part in front of its starting point or end point. In addition, the "end" of the element can also be formed into a bend or fold. The "end" also includes "one end", "the other end", "the front end", "the terminal part" or "the open end". In addition, the connecting part between the elements can also be connected in a manner having a curvature.

[0311] In addition, the antenna element and the electrode (feeding unit) are formed, for example, by printing a paste containing a conductive metal (for example, a silver paste, etc.) on the inner surface of the window glass and sintering it. However, the method for forming the antenna element and the electrode is not limited to this method. For example, the antenna element or the electrode can also be formed by providing a linear body or a foil-shaped body containing a conductive material such as copper on the inner surface or the outer surface of the window glass. Alternatively, the antenna element or the electrode can also be bonded to the window glass with an adhesive or the like, or can be provided inside the window glass itself.

[0312] The shape of the electrode is preferably a square, substantially square, rectangular, substantially rectangular or polygonal shape in terms of implementation. Alternatively, the electrode may be a circle, substantially circle, ellipse, substantially ellipse or the like.

[0313] In addition, a structure in which a conductor layer forming at least one of an antenna element and an electrode is provided inside or on the surface of a synthetic resin film, and a synthetic resin film with a conductor layer is provided on the vehicle inner side surface or vehicle outer side surface of a window glass. In addition, a structure in which a flexible circuit substrate on which at least one of an antenna element and an electrode is formed is provided on the vehicle inner side surface or vehicle outer side surface of a window glass may be adopted.

[0314] Explanation of symbols

[0315] 11 Opening

[0316] 12 outer panel

[0317] 13 Inner plate

[0318] 14 Reinforcement materials

[0319] 15 Rear window

[0320] 16 Window frame

[0321] 17 shading film

[0322] 20 Defogger

[0323] 22 Lower edge

[0324] 24 Right edge

[0325] 30, 30A~30H First antenna conductor

[0326] 31 First feeder

[0327] 32 first antenna element

[0328] 33 First approach

[0329] 38 Line Element

[0330] 39 Second approach

[0331] 41~44 Surrounding area

[0332] 50A, 50B, 50C Second antenna conductor

[0333] 51 Second power feeder

[0334] 52 Connecting elements

[0335] 53 Vertical elements

[0336] 54 Horizontal element

[0337] 55 Second antenna element

[0338] 60A Third antenna conductor

[0339] 61 Third feeder

[0340] 65 Third antenna element

[0341] 70A, 70C Fourth antenna conductor

[0342] 70B Fifth antenna conductor

[0343] 100 Tailgate.

Claims

1. A rear trunk door having a resin outer plate having an opening formed therein, and Resin inner panels, and a metal reinforcement material disposed between the outer plate and the inner plate, and A rear window glass covering the opening, The rear window glass includes a defogger and a first antenna conductor capable of receiving radio waves in a frequency band of AM broadcast waves. The first antenna conductor includes a first power feeder and a first antenna element connected to the first power feeder and having a total length of 100 mm to 1800 mm. The first feeder is located in the first antenna conductor, and is closest to the reinforcing material serving as a vehicle body ground in a plan view of the rear window glass. The first antenna element has a first proximity portion extending along the first outer edge at a distance of 3 mm to 60 mm from the first outer edge of the upper, lower, left, and right outer edges of the defogger. The first antenna element is located at a position spaced 10 mm or more from the reinforcing material, or is located on a side of the first outer edge where the reinforcing material does not exist in a plan view of the rear window glass.

2. The rear trunk door according to claim 1, characterized in that: The first antenna element is disposed in only one peripheral region among four peripheral regions located in the upper, lower, left, and right directions outside the defogger, or is disposed in only two adjacent peripheral regions.

3. The rear trunk door according to claim 1 or 2, characterized in that: The first antenna element is arranged so as not to overlap with the reinforcing material in a plan view of the rear window glass.

4. The rear trunk door according to claim 3, characterized in that: The first antenna conductor is arranged so as not to overlap with the reinforcing material in a plan view of the rear window glass.

5. The rear trunk door according to any one of claims 1 to 4, characterized in that: The first approach portion is spaced 3 mm to 60 mm from the first outer edge and has a length of 100 mm or more extending along the first outer edge.

6. The rear trunk door according to any one of claims 1 to 5, characterized in that: The antenna capacitance of the first antenna element relative to the vehicle body ground is 5 pF to 30 pF.

7. The rear trunk door according to any one of claims 1 to 6, characterized in that: The first antenna element includes a linear element disposed in only one peripheral region among four peripheral regions of the upper, lower, left, and right sides of the outside of the defogger.

8. The rear trunk door according to claim 7, characterized in that: The area of ​​the linear element is 0.0001m 2 ~0.001m 2 .

9. The rear trunk door according to any one of claims 1 to 6, characterized in that: The first antenna element includes a ring-shaped element disposed in only one peripheral region among four peripheral regions of the upper, lower, left, and right sides of the outside of the defogger.

10. The rear trunk door according to claim 9, characterized in that: The area enclosed by the ring of the above-mentioned ring-shaped element is 0.01m 2 ~0.05m 2 .

11. The rear trunk door according to claim 9 or 10, characterized in that: The annular element has a rectangular shape having a long side in a horizontal direction extending along the first outer edge, and a short side of the rectangle has a length of 80 mm or less.

12. The rear trunk door according to claim 11, characterized in that: The length of the long side of the rectangle is less than or equal to 3 / 4 of the length of the first outer edge.

13. The rear trunk door according to claim 11 or 12, characterized in that: The distance between the first outer edge and the first antenna element is 3 mm to 30 mm. The length of the short side of the rectangle is 3 mm to 50 mm. The first antenna conductor can also receive radio waves in the frequency band of FM broadcast waves.

14. The rear trunk door according to any one of claims 11 to 13, characterized in that: The distance between the first outer edge and the first antenna element is 3 mm to 30 mm. The length of the short side of the rectangle is 3 mm to 50 mm. The first antenna conductor further includes a linear element directly or indirectly connected to the first antenna element. The linear element has a portion extending along the long side of the rectangle on the side opposite to the defogger relative to the first antenna element. The first antenna conductor can also receive radio waves in the frequency band of FM broadcast waves.

15. The rear trunk door according to any one of claims 1 to 14, characterized in that: The first antenna element is disposed only in a region below the defogger.

16. The rear trunk door according to any one of claims 1 to 8, characterized in that: The first antenna element further includes a second proximity portion extending along a second outer edge connected to the first outer edge at a distance of 10 mm to 40 mm from the second outer edge in the upper, lower, left and right outer edges of the defogger.

17. The rear trunk door according to claim 16, characterized in that: The first approach portion is disposed in a region below the defogger.

18. The rear trunk door according to any one of claims 1 to 17, characterized in that: The rear window glass further includes a second antenna conductor capable of receiving radio waves in the frequency band of FM broadcast waves. The first antenna conductor is arranged in a region below the defogger. The second antenna conductor includes a second feeder connected to or close to the defogger, and a second antenna element disposed at a distance of 1 mm to 40 mm from the defogger. The second antenna element extends from the second power feeding portion, through any one of two left and right peripheral regions located outside the defogger, to a region above the defogger.

19. The rear trunk door according to any one of claims 1 to 17, characterized in that: The rear window glass further includes a second antenna conductor capable of receiving radio waves in the frequency band of FM broadcast waves, and a third antenna conductor capable of receiving radio waves in the frequency band of FM broadcast waves. The first antenna conductor is arranged in a region below the defogger. The second antenna conductor has a second feeder electrically connected to the defogger. The third antenna conductor includes a third power feeder and a third antenna element disposed at a distance of 1 mm to 40 mm from the defogger. The third antenna element extends from the third power feeder to a region on the opposite side to the side where the second power feeder is located among two left and right peripheral regions located outside the defogger.

20. The rear trunk door according to any one of claims 1 to 17, characterized in that: The rear window glass further includes a second antenna conductor capable of receiving radio waves in the frequency band of FM broadcast waves, and a third antenna conductor capable of receiving radio waves in the frequency band of FM broadcast waves. The first antenna conductor is arranged in a region below the defogger. The second antenna conductor includes a second power feeder and a second antenna element disposed at a distance of 1 mm to 40 mm from the defogger. The third antenna conductor includes a third power feeder and a third antenna element disposed at a distance of 1 mm to 40 mm from the defogger. The second antenna element extends from the second power feeder in two left and right peripheral areas outside the defogger, in an area opposite to the side where the third power feeder is located. The third antenna element extends from the third power feeder in two left and right peripheral regions located outside the defogger, in a region opposite to a side where the second power feeder is located.

21. The rear trunk door according to any one of claims 1 to 17, characterized in that: The rear window glass further includes a second antenna conductor capable of receiving radio waves in the frequency band of FM broadcast waves, and a T-shaped element vertically penetrating the defogger. The first antenna conductor is arranged in a region below the defogger. The second antenna conductor includes a second power feeder electrically connected to the defogger.

22. The rear trunk door according to any one of claims 1 to 21, characterized in that: The rear window glass further includes a fourth antenna conductor capable of receiving radio waves in at least one frequency band among FM broadcast waves, DAB bands I and II, and terrestrial digital television broadcast waves. The fourth antenna conductor includes a fourth power feeder and a fourth antenna element connected to the fourth power feeder.

23. The rear trunk door according to any one of claims 1 to 22, characterized in that: The reinforcing material is in the shape of a frame.

24. The rear trunk door according to any one of claims 1 to 22, characterized in that: The reinforcing material is composed of a plurality of members separated into left and right parts.

25. The rear trunk door according to any one of claims 1 to 22, characterized in that: The reinforcing material is in a U-shape.

26. A rear window glass that can be mounted on a rear trunk door made of resin and having a metal reinforcement material so as to cover an opening portion formed in the rear trunk door, A defogger and a first antenna conductor capable of receiving radio waves in the frequency band of AM broadcast waves, The first antenna conductor includes a first power feeder and a first antenna element connected to the first power feeder and having a total length of 100 mm to 1800 mm. The first feeder is located in the first antenna conductor, and is closest to the reinforcing material serving as a vehicle body ground in a plan view of the rear window glass. The first antenna element has a first proximity portion extending along the first outer edge at a distance of 3 mm to 60 mm from the first outer edge of the upper, lower, left, and right outer edges of the defogger. When mounted on the rear trunk door, the first antenna element is located at a position 10 mm or more away from the reinforcing material, or is located on a side of the first outer edge where the reinforcing material does not exist in a plan view of the rear window glass.

Images