Broadcasting reception antenna device and component for the same

Abstract

To provide a broadcasting reception antenna device that can be easily installed even in a narrow space and whose reception level can be easily changed and a component for the same used in such a broadcasting reception antenna device.SOLUTION: The broadcasting reception antenna device includes a first component and a second component that is separate from the first component and provided adjacent to the first component. The first component has a first substrate, a radiating element provided on the first substrate, a reflecting element provided on the first substrate, and a first waveguide element provided on the first substrate. The reflecting element, the radiating element, and the first waveguide element are provided in this order. The second component has a second substrate provided adjacent to the first substrate and a second waveguide element provided on the second substrate. The second waveguide element is provided on the opposite side of the radiating element of the first waveguide element.SELECTED DRAWING: Figure 1

Description

Technical Field

[0001] The present invention relates to a broadcast receiving antenna device and parts for a broadcast receiving antenna device.

Background Art

[0002] For receiving terrestrial digital television broadcasts (hereinafter referred to as "terrestrial digital broadcasts"), an antenna device capable of receiving radio waves in the UHF band is used.

[0003] For example, Patent Document 1 discloses a Yagi-Uda antenna for receiving terrestrial digital broadcasts, which includes a radiator, a reflector, and a waveguide. This Yagi-Uda antenna is made of a metal material such as aluminum. It is installed on the roof or rooftop of a house and fixed in the direction from which radio waves arrive.

[0004] However, since conventional antennas for receiving terrestrial digital broadcasts are installed outdoors, there is a concern that they may be tilted or damaged by strong winds. In addition, it is also a problem that the appearance of the building is damaged. On the other hand, although indoor antenna devices are also known, they have the problem of low reception sensitivity. In addition, outdoor antenna devices are difficult to install indoors from the perspective of size.

[0005] Furthermore, depending on the area where the antenna device is installed, the reception level of the broadcast wave may be too strong. In this case, it is conceivable to prepare antenna devices with different gains in advance, but there is a concern that this will lead to an increase in the labor and cost involved in the manufacture and management of the antenna device.

Prior Art Documents

Patent Documents

[0006]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0007] An object of the present invention is to provide a broadcast receiving antenna device that can be easily installed in a narrow space and whose reception level can be easily changed, and a component for a broadcast receiving antenna device used in such a broadcast receiving antenna device.

Means for Solving the Problems

[0008] Such an object is achieved by the present invention described in the following (1) to (11). (1) A first component, A second component that is separate from the first component and is provided adjacent to the first component, and comprising, The first component is a first substrate, a radiating element provided on the first substrate, a reflecting element provided on the first substrate, a first waveguide element provided on the first substrate, and having, the reflecting element, the radiating element, and the first waveguide element are provided so as to be arranged in this order, The second component is a second substrate provided adjacent to the first substrate, a second waveguide element provided on the second substrate, and having, a broadcast receiving antenna device, characterized in that the second waveguide element is provided on the opposite side of the radiating element of the first waveguide element.

[0009] (2) The first component has a first engaging portion provided on the first substrate, The second component has a second A engaging portion provided on the second substrate and engaging with the first engaging portion, and the broadcast receiving antenna device according to (1) above.

[0010] (3) The broadcast receiving antenna device according to (2) above, wherein the first engaging portion and the second A engaging portion are in a form in which the engagement can be released after they are engaged with each other.

[0011] (4) The broadcast receiving antenna device according to any one of (1) to (3) above, wherein each constituent material of the first substrate and the second substrate is a resin material.

[0012] (5) The broadcast receiving antenna device according to any one of (1) to (4) above, further comprising a third component that is separate from the first component and the second component and is provided adjacent to the second component. The third component includes: a third substrate provided adjacent to the second substrate; a third waveguide element provided on the third substrate; and has The third waveguide element is provided on the side opposite to the first waveguide element of the second waveguide element.

[0013] (6) The second component has a second B engaging portion provided on the second substrate. The third component has a third engaging portion provided on the third substrate and engaging with the second B engaging portion. The broadcast receiving antenna device according to (5) above.

[0014] (7) The broadcast receiving antenna device according to any one of (1) to (6) above, which is used for receiving radio waves with a frequency of 470 MHz or more and 710 MHz or less.

[0015] (8) The broadcast receiving antenna device according to any one of (1) to (7) above, which is installed in the attic of a building.

[0016] (9) The broadcast receiving antenna device according to any one of (1) to (7) above, which is installed between the structural material of a building and a waterproof sheet.

[0017] (10) The first component has a plurality of element groups each composed of the radiation element, the reflection element, and the first waveguide element. The second component has the second waveguide elements that are an integral multiple of the number of the element groups. The broadcast receiving antenna device according to any one of (1) to (9) above.

[0018] (11) A first substrate, a radiation element provided on the first substrate, a reflection element provided on the first substrate, a first waveguide element provided on the first substrate, a first engaging portion provided on the first substrate and engageable with a second A engaging portion of other components, and having the reflection element, the radiation element, the first waveguide element, and the first engaging portion are provided so as to be arranged in this order, and is a component for a broadcast receiving antenna device.

Advantages of the Invention

[0019] According to the present invention, a broadcast receiving antenna device that can be easily installed even in a narrow space and whose reception sensitivity can be easily changed can be obtained.

[0020] Also, according to the present invention, a component for a broadcast receiving antenna device used in the above broadcast receiving antenna device can be obtained.

Brief Description of the Drawings

[0021]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Figure 6

Figure 7

Best Mode for Carrying Out the Invention

[0022] Hereinafter, the broadcast receiving antenna device and parts for the broadcast receiving antenna device according to the present invention will be described in detail based on the preferred embodiments shown in the accompanying drawings.

[0023] FIG. 1 is a top view showing the configuration of the broadcast receiving antenna device 1 according to the embodiment. FIG. 2 is a cross-sectional view of the broadcast receiving antenna device 1 shown in FIG. 1. FIG. 3 is a perspective view of the first part 2 shown in FIG. 1. In each figure of the present application, the X-axis, Y-axis, and Z-axis are set as three axes orthogonal to each other. Each axis is represented by an arrow, and the tip side of the arrow is “plus” and the base end side of the arrow is “minus”. In the following description, for example, the “X-axis direction” includes both the plus direction and the minus direction of the X-axis. The same applies to the Y-axis direction and the Z-axis direction. Also, in the following description, in particular, the Z-axis plus side is also referred to as “up” and the Z-axis minus side is also referred to as “down”.

[0024] The broadcast receiving antenna device 1 shown in FIGS. 1 and 2 includes a first part 2, a second part 3, and a third part 4. These are adjacent to each other and are arranged in a row in this order toward the X-axis plus side.

[0025] The first part 2 has a first substrate 21, a radiating element 22, a reflecting element 23, and a first waveguide element 24. The second part 3 is separate from the first part 2 and has a second substrate 31 and a second waveguide element 34. The third part 4 is separate from the first part 2 and the second part 3 and has a third substrate 41 and a third waveguide element 44.

[0026] When the first part 2, the second part 3, and the third part 4 are arranged as described above, the reflecting element 23, the radiating element 22, the first waveguide element 24, the second waveguide element 34, and the third waveguide element 44 are arranged in this order toward the X-axis plus side.

[0027] By arranging the components in this way, the broadcast receiving antenna device 1 can receive the broadcast waves (radio waves) arriving from the positive X-axis side toward the negative X-axis side with high sensitivity. Also, in the broadcast receiving antenna device 1, the first component 2, the second component 3, and the third component 4 are each in a flat plate shape and are separable from each other. For this reason, the broadcast receiving antenna device 1 has excellent portability and can be easily installed even in a narrow space. Examples of the broadcast waves include radio waves in the UHF band. For this reason, the broadcast receiving antenna device 1 is preferably used, for example, for receiving terrestrial digital broadcast waves having a frequency of 470 MHz or higher and 710 MHz or lower.

[0028] Also, since the first component 2 has the elements necessary for a standing wave antenna such as a Yagi antenna, it functions as an antenna device even alone. Since the second component 3 and the third component 4 each have a waveguide element, by arranging them adjacent to the first component 2, the operating gain of the broadcast receiving antenna device 1 can be increased. That is, in the broadcast receiving antenna device 1, the number of waveguide elements can be easily changed according to the intensity (electric field strength) of the broadcast waves at the installation location. Thereby, any one of the usage forms of using all of the first component 2, the second component 3, and the third component 4, the usage form of using the first component 2 and the second component 3, and the usage form of using only the first component 2 can be selected. As a result, the reception sensitivity of the broadcast waves can be easily adjusted, and a broadcast receiving antenna device 1 that can stably receive at an optimal reception level can be constructed.

[0029] 1. Configuration of the First Component First, the first component 2 will be described.

[0030] The first component 2 includes a first substrate 21, a radiating element 22, a reflecting element 23, and a first waveguide element 24.

[0031] 1.1. The First Substrate The first substrate 21 has a plate shape extending along the X-Y plane. As shown in FIG. 2, the first substrate 21 has a lower surface 211 and an upper surface 212 that have a front-back relationship with each other.

[0032] Although the thickness t21 of the first substrate 21 shown in FIG. 3 is not particularly limited, for example, it is preferably 100 μm or more and 10 mm or less, and more preferably 200 μm or more and 5 mm or less. Thereby, the weight of the first substrate 21 can be reduced, and the first component 2 that is easy to handle can be realized.

[0033] The size of the first substrate 21 is appropriately set according to the length, width, interval, number, etc. of the radiation element 22, the reflection element 23, and the first waveguide element 24.

[0034] Examples of the constituent material of the first substrate 21 include resin materials, ceramic materials, glass materials, etc. Further, a composite material containing one or more of these may also be used.

[0035] Examples of the resin material include olefin resins such as polyethylene and polypropylene, polyester resins such as polyethylene terephthalate, polyethylene naphthalate, polybutylene terephthalate, and polybutylene naphthalate, polyvinyl chloride resins, thermoplastic polyurethanes, thermoplastic polyimides, polyamides, polyether ketones such as polyether ether ketone, polyether sulfones, polystyrenes, fluorine resins, cellulose resins, styrene-based thermoplastic elastomers (styrene-based polymers), acrylic resins, polyester-based thermoplastic elastomers, polycarbonates (carbonate-based polymers), and other various thermoplastic resins, and thermosetting polyurethanes, thermosetting polyimides, phenol resins, epoxy resins, silicone resins, urea resins, melamine resins, and other various thermosetting resins. Further, a polymer blend or polymer alloy composed of one or more of these may also be used.

[0036] Further, these resin materials may be in a fibrous form. Examples of the form of the fibrous resin material include fabrics such as non-woven fabrics and woven fabrics, meshes, chopped strands, etc.

[0037] Examples of the ceramic material include alumina, zirconia, magnesia, titania, silica, etc. Examples of the glass material include glass cloth, etc.

[0038] As the constituent material of the first substrate 21, a resin material is preferably used. By using the resin material, the weight of the first component 2 can be reduced.

[0039] Also, the first substrate 21 may have rigidity such that it does not bend under its own weight when, for example, the end in the X-axis direction is cantilever-supported, or it may have flexibility to bend under its own weight. In the former case, since the flatness of the first component 2 is likely to be maintained, the efficiency of the installation work of the broadcast reception antenna device 1 can be easily increased. In the latter case, for example, the first component 2 can be stored, transported, etc. with the first substrate 21 wound up. Therefore, the efficiency of storage, transportation, etc. can be easily increased.

[0040] 1.2. Radiation element The radiation element 22 is disposed on the upper surface 212 of the first substrate 21. The radiation element 22 shown in FIG. 1 has element conductors 22a, 22b. The element conductors 22a, 22b each have a strip shape extending along the Y-axis. Also, the element conductors 22a, 22b are arranged in the Y-axis direction with a gap therebetween. Thereby, a dipole antenna is formed. These element conductors 22a, 22b are connected to a feeding line (not shown). Thereby, a signal corresponding to the broadcast wave received by the radiation element 22 flows through the feeding line. This signal is received by a display device (not shown) and demodulated into video, audio, various data, etc.

[0041] The length L22 of the radiation element 22 (the length from the Y-axis positive side end of the element conductor 22a to the Y-axis negative side end of the element conductor 22b) is set to about 1 / 2 of the wavelength λ of the received broadcast wave, for example, but it may be longer or shorter than this. For example, the wavelength of the radio wave propagating in the radiation element 22 becomes shorter than the wavelength λ of the broadcast wave. Therefore, the length L22 is preferably (1 / 2)λ or less, and more preferably (1 / 4)λ or more and less than (1 / 2)λ. Thereby, the broadcast reception antenna device 1 having high reception sensitivity can be realized in a sufficiently wide band.

[0042] Also, let the width of the radiation element 22 be W22. The ratio W22 / L22 of the width W22 to the length L22 of the radiation element 22 is not particularly limited, but is preferably 0.10 or more and 0.50 or less, more preferably 0.13 or more and 0.35 or less, and even more preferably 0.15 or more and 0.30 or less. By setting the ratio W22 / L22 within the above range, the broadcast reception antenna device 1 having high reception sensitivity can be realized in a sufficiently wide band.

[0043] Note that if the ratio W22 / L22 falls below the lower limit value or exceeds the upper limit value, the balance of the shape of the radiation element 22 may deteriorate, the reception sensitivity may decrease, or the band that can be received with high sensitivity may become narrow.

[0044] The thickness t22 of the radiation element 22 shown in FIG. 3 is not particularly limited, but is preferably 5 μm or more and 1000 μm or less, more preferably 10 μm or more and 300 μm or less, and even more preferably 15 μm or more and 100 μm or less. By the thickness t22 being within the above range, the electrical resistance of the radiation element 22 can be kept low and the manufacturability of the radiation element 22 can be enhanced.

[0045] The constituent material of the radiation element 22 is not particularly limited, and examples include single metal elements such as copper, aluminum, nickel, silver, and gold, or metal materials such as alloys containing these.

[0046] Examples of the form of the radiation element 22 include foils of these metal materials, conductive paste coatings, conductive ink coatings, and the like.

[0047] The shape of the radiation element 22 is not limited to the illustrated shape (strip shape), and other shapes may be used.

[0048] 1.3. Reflective Element The reflective element 23 is disposed on the upper surface 212 of the first substrate 21. The reflective element 23 shown in FIG. 1 has a strip shape extending along the Y-axis. The reflective element 23 is disposed on the minus X-axis side of the radiation element 22. The reflective element 23 reflects the incoming broadcast wave to the radiation element 22, thereby enhancing the directivity of the broadcast receiving antenna device 1. As a result, the operating gain of the broadcast receiving antenna device 1 is increased.

[0049] The length L23 of the reflective element 23 (the length of the reflective element 23 in the Y-axis direction) may be the same as the length L22 of the radiation element 22, or may be longer than the length L22 of the radiation element 22. This can enhance the reflection efficiency of the broadcast wave by the reflective element 23.

[0050] The length L23 is set to about 1 / 2 of the wavelength λ of the received broadcast wave, for example, but may be longer or shorter than this. For example, the length L23 is preferably (1 / 4)λ or more, and more preferably (1 / 3)λ or more and (2 / 3)λ or less. This can realize a broadcast receiving antenna device 1 having high reception sensitivity in a sufficiently wide band.

[0051] Also, let the width of the reflective element 23 be W23. The ratio W23 / L23 of the width W23 to the length L23 of the reflective element 23 is not particularly limited, but is preferably 0.03 or more and 0.25 or less, more preferably 0.04 or more and 0.20 or less, and even more preferably 0.05 or more and 0.15 or less. By setting the ratio W23 / L23 within the above range, a broadcast receiving antenna device 1 having high reception sensitivity can be realized in a sufficiently wide band.

[0052] In addition, if the ratio W23 / L23 is less than the lower limit value or greater than the upper limit value, the balance of the shape of the reflecting element 23 deteriorates, and there is a risk that the reception sensitivity decreases or the band that can be received with high sensitivity becomes narrow.

[0053] The distance S22-23 between the radiating element 22 and the reflecting element 23 is appropriately set according to the wavelength λ of the broadcast wave to be received. For example, it is set to about (1 / 4)λ, preferably (1 / 8)λ or more and (1 / 3)λ or less, and more preferably (1 / 6)λ or more and (1 / 4)λ or less. Thereby, the reflection efficiency of the broadcast wave in the reflecting element 23 becomes higher.

[0054] The thickness of the reflecting element 23 is not particularly limited, but is preferably within the range of the thicknesses listed as the thickness t22 of the radiating element 22.

[0055] The constituent material and form of the reflecting element 23 are not particularly limited, but are preferably appropriately selected from those listed as the constituent material and form of the radiating element 22.

[0056] The shape of the reflecting element 23 is not limited to the illustrated shape (strip shape), and other shapes may be used.

[0057] 1.4. First waveguide element The first waveguide element 24 is disposed on the upper surface 212 of the first substrate 21. The first waveguide element 24 shown in FIG. 1 has element conductors 24a, 24b, 24c, and 24d. The element conductors 24a, 24b, 24c, and 24d each have a strip shape extending along the Y axis. Further, the element conductors 24a, 24b, 24c, and 24d are arranged in the X-axis direction with a gap therebetween. The first waveguide element 24 guides the incoming broadcast wave to the radiating element 22, enhances the directivity of the broadcast reception antenna device 1, and increases the operating gain.

[0058] The length L24 of the first waveguide element 24 (the length in the Y-axis direction of the element conductors 24a, 24b, 24c, and 24d) is preferably shorter than the length L22 of the radiation element 22. Thereby, the induction efficiency of the broadcast wave by the first waveguide element 24 can be increased. The length L24 is set, for example, to be shorter than about 1 / 2 of the wavelength λ of the received broadcast wave, but it may be longer or shorter than this. For example, the length L24 is preferably (1 / 2)λ or less, and more preferably (1 / 8)λ or more and less than (1 / 2)λ. Thereby, the broadcast receiving antenna device 1 having high reception sensitivity can be realized in a sufficiently wide band.

[0059] Note that the lengths L24 of the element conductors 24a, 24b, 24c, and 24d are preferably the same as each other, but may be different from each other.

[0060] Also, let the widths of the element conductors 24a, 24b, 24c, and 24d be W24. The ratio W24 / L24 of the width W24 to the length L24 of the first waveguide element 24 is not particularly limited, but is preferably 0.03 or more and 0.30 or less, and more preferably 0.05 or more and 0.20 or less. By setting the ratio W24 / L24 within the above range, the broadcast receiving antenna device 1 having high reception sensitivity can be realized in a sufficiently wide band.

[0061] Note that if the ratio W24 / L24 falls below the lower limit value or exceeds the upper limit value, the balance of the shape of the first waveguide element 24 may deteriorate, the reception sensitivity may decrease, or the band that can be received with high sensitivity may become narrow.

[0062] Also, the widths W24 of the element conductors 24a, 24b, 24c, and 24d are preferably the same as each other, but may be different from each other.

[0063] The distance S22-24 between the radiation element 22 and the first waveguide element 24 is appropriately set according to the wavelength λ of the received broadcast wave. For example, it is set to about (1 / 4)λ, but preferably it is set to be not less than (1 / 8)λ and not more than (1 / 3)λ, and more preferably it is set to be not less than (1 / 6)λ and not more than (1 / 4)λ. Thereby, a broadcast receiving antenna device 1 having high reception sensitivity can be realized in a sufficiently wide band.

[0064] In addition, in this specification, the "distance" is defined starting from the intermediate line in the X-axis direction of the conductor constituting each element. For example, the distance S22-24 is the distance between the intermediate line in the X-axis direction of the radiation element 22 and the intermediate line in the X-axis direction of the element conductor 24a.

[0065] The distance S24-24 between the element conductors 24a, 24b, 24c, and 24d is appropriately set according to the wavelength λ of the received broadcast wave. For example, it is set to about (1 / 4)λ, but preferably it is set to be not less than (1 / 8)λ and not more than (1 / 3)λ, and more preferably it is set to be not less than (1 / 6)λ and not more than (1 / 4)λ. Thereby, a broadcast receiving antenna device 1 having high reception sensitivity can be realized in a sufficiently wide band. Note that the distance S24-24 is the distance between adjacent element conductors.

[0066] The thickness of the first waveguide element 24 is not particularly limited, but it is preferably within the range of the thickness mentioned as the thickness t22 of the radiation element 22.

[0067] The constituent material and form of the first waveguide element 24 are not particularly limited, but it is preferably appropriately selected from those mentioned as the constituent material and form of the radiation element 22.

[0068] The shape of the first waveguide element 24 is not limited to the illustrated shape (strip shape), and other shapes may be used.

[0069] The number of element conductors of the first waveguide element 24 is not limited to 4, and may be 1 to 3 or 5 or more. The larger the number of element conductors, the easier it is to increase the directivity and operating gain of the broadcast receiving antenna device 1.

[0070] 2. Configuration of the Second Component Next, the second component 3 will be described.

[0071] The second component 3 includes a second substrate 31 and a second waveguide element 34. Such a second component 3 is arranged adjacent to the positive X-axis side of the first component 2. Thereby, compared with the case where only the first component 2 is used, the operating gain of the broadcast receiving antenna device 1 can be increased. Therefore, at the site where the broadcast receiving antenna device 1 is installed, after measuring the intensity of the broadcast wave, it is possible to select whether to add the second component 3 according to the measurement result. Thereby, it is possible to easily install the broadcast receiving antenna device 1 having an optimal reception sensitivity according to the intensity of the broadcast wave.

[0072] 2.1. Second Substrate The second substrate 31 has a plate shape extending along the X-Y plane. The second substrate 31 has a lower surface 311 and an upper surface 312 that are in a front-back relationship with each other.

[0073] The thickness of the second substrate 31 is not particularly limited, but it is preferably within the range of the thickness mentioned as the thickness t21 of the first substrate 21. Thereby, since a lightweight second substrate 31 can be obtained, a second component 3 that is easy to handle can be realized.

[0074] The constituent material of the second substrate 31 is not particularly limited, but it is preferably appropriately selected from the materials mentioned as the constituent materials of the first substrate 21.

[0075] A resin material is preferably used as the constituent material of the second substrate 31. By using a resin material, the weight of the second component 3 can be reduced.

[0076] Further, the second substrate 31 may have rigidity such that it does not bend under its own weight when, for example, the end in the X-axis direction is cantilevered, or it may have flexibility to bend under its own weight. In the former case, since the flatness of the second component 3 is likely to be maintained, it is easy to improve the efficiency of the installation work of the broadcast receiving antenna device 1. In the latter case, for example, the second component 3 can be stored and transported in a state where the second substrate 31 is wound up. Therefore, it is easy to improve the efficiency of storage, transportation, etc.

[0077] 2.2. Second waveguide element The second waveguide element 34 is disposed on the upper surface 312 of the second substrate 31. The second waveguide element 34 shown in FIG. 1 has element conductors 34a, 34b, 34c, and 34d. The element conductors 34a, 34b, 34c, and 34d are each in a strip shape extending along the Y-axis. Further, the element conductors 34a, 34b, 34c, and 34d are arranged in the X-axis direction with a gap therebetween. The second waveguide element 34 induces the incoming broadcast wave to the radiating element 22 and enhances the directivity of the broadcast receiving antenna device 1. Thereby, the operating gain of the broadcast receiving antenna device 1 is increased.

[0078] The length L34 of the second waveguide element 34 (the length of the element conductors 34a, 34b, 34c, and 34d in the Y-axis direction) is preferably shorter than the length L22 of the radiating element 22. Thereby, the induction efficiency of the broadcast wave by the second waveguide element 34 can be increased. The length L34 is set, for example, to be shorter than 1 / 2 of the wavelength λ of the received broadcast wave, but it may be longer or shorter than this. For example, the length L34 is preferably (1 / 2)λ or less, and more preferably (1 / 8)λ or more and less than (1 / 2)λ. Thereby, a broadcast receiving antenna device 1 having high reception sensitivity can be realized in a sufficiently wide band.

[0079] Also, let the widths of the element conductors 34a, 34b, 34c, and 34d be W34. The ratio W34 / L34 of the width W34 to the length L34 of the second waveguide element 34 is not particularly limited, but is preferably 0.03 or more and 0.30 or less, and more preferably 0.05 or more and 0.20 or less. By setting the ratio W34 / L34 within the above range, a broadcast receiving antenna device 1 having high reception sensitivity can be realized in a sufficiently wide band.

[0080] Note that if the ratio W34 / L34 is less than the lower limit value or exceeds the upper limit value, the balance of the shape of the second waveguide element 34 may deteriorate, resulting in a decrease in reception sensitivity or a narrowing of the band that can be received with high sensitivity.

[0081] The distance S24-34 between the first waveguide element 24 and the second waveguide element 34 is appropriately set according to the wavelength λ of the broadcast wave to be received. For example, it is set to about (1 / 4)λ, but is preferably (1 / 8)λ or more and (1 / 3)λ or less, and more preferably (1 / 6)λ or more and (1 / 4)λ or less. Thereby, a broadcast receiving antenna device 1 having high reception sensitivity can be realized in a sufficiently wide band.

[0082] Note that the distance S24-34 is determined according to the arrangement of the element conductor 24d on the upper surface 212 of the first substrate 21 and the arrangement of the element conductor 34a on the upper surface 312 of the second substrate 31. Specifically, as shown in FIG. 1, the distance S24-34 is the sum of the length L24d from the intermediate line of the element conductor 24d in the X-axis direction to the end of the first substrate 21 on the positive X-axis side and the length L34a from the intermediate line of the element conductor 34a in the X-axis direction to the end of the second substrate 31 on the negative X-axis side. Therefore, as long as the arrangements of the element conductors 24d and 34a are set so that the sum of the length L24d and the length L34a falls within the above range. Thereby, the distance S24-34 can be easily set to the target distance simply by butting the end of the first substrate 21 on the positive X-axis side against the end of the second substrate 31 on the negative X-axis side. Therefore, a broadcast receiving antenna device 1 is obtained that not only has the advantages of high portability and high freedom of installation location, but also excellent workability.

[0083] The interval S34-34 between the element conductors 34a, 34b, 34c, and 34d is appropriately set according to the wavelength λ of the received broadcast wave. For example, it is set to about (1 / 4)λ, preferably (1 / 8)λ or more and (1 / 3)λ or less, and more preferably (1 / 6)λ or more and (1 / 4)λ or less. Thereby, a broadcast receiving antenna device 1 having high reception sensitivity can be realized in a sufficiently wide band.

[0084] The thickness of the second waveguide element 34 is not particularly limited, but is preferably within the range of the thickness mentioned as the thickness t22 of the radiating element 22.

[0085] The constituent material and form of the second waveguide element 34 are not particularly limited, but are preferably appropriately selected from those mentioned as the constituent material and form of the radiating element 22.

[0086] The shape of the second waveguide element 34 is not limited to the illustrated shape (strip shape), and other shapes may be used.

[0087] The number of element conductors included in the second waveguide element 34 is not limited to four, and may be 1 to 3 or 5 or more. As the number of element conductors increases, it becomes easier to increase the directivity and operating gain of the broadcast receiving antenna device 1.

[0088] 3. Configuration of the Third Component Next, the third component 4 will be described.

[0089] The third component 4 includes a third substrate 41 and a third waveguide element 44. Such a third component 4 is arranged adjacent to the +X axis side of the second component 3. Thereby, compared with the case where the broadcast receiving antenna device 1 is composed of only the first component 2 and the second component 3, the operating gain of the broadcast receiving antenna device 1 can be further increased. Therefore, at the site where the broadcast receiving antenna device 1 is installed, for example, after measuring the intensity of the broadcast wave, it is possible to select whether to further add the third component 4 according to the measurement result. Thereby, a broadcast receiving antenna device 1 having an optimal reception sensitivity according to the intensity of the broadcast wave can be easily assembled and installed.

[0090] 3.1. Third Substrate The third substrate 41 has a plate shape extending along the X-Y plane. As shown in FIG. 2, the third substrate 41 has a lower surface 411 and an upper surface 412 which are in a front-back relationship with each other. The configuration of the third substrate 41 is the same as that of the second substrate 31.

[0091] 3.2. Third Waveguide Element The third waveguide element 44 is disposed on the upper surface 412 of the third substrate 41. The third waveguide element 44 shown in FIG. 1 has element conductors 44a, 44b, 44c, and 44d. The element conductors 44a, 44b, 44c, and 44d each have a strip shape extending along the Y-axis. Also, the element conductors 44a, 44b, 44c, and 44d are arranged in the X-axis direction with a gap therebetween. The third waveguide element 44 induces an incoming broadcast wave to the radiating element 22 and enhances the directivity of the broadcast receiving antenna device 1. Thereby, the operating gain of the broadcast receiving antenna device 1 is enhanced. The configuration of the third waveguide element 44 is the same as that of the second waveguide element 34.

[0092] Also, the number n1 of element conductors of the first waveguide element 24, the number n2 of element conductors of the second waveguide element 34, and the number n3 of element conductors of the third waveguide element 44 may be the same as each other or different from each other. For example, by making the number n2 and the number n3 different, the operating gain can be made different between the case where the first component 2 and the second component 3 are arranged adjacent to each other and the case where the first component 2 and the third component 4 are arranged adjacent to each other. Thereby, a broadcast receiving antenna device 1 having an optimal reception sensitivity according to the intensity of the broadcast wave can be easily assembled and installed.

[0093] Also, one or more components similar to the third component 4 may be added to the broadcast receiving antenna device 1. Also in this case, in the added components, the number of element conductors of the waveguide element is not particularly limited.

[0094] On the other hand, the third component 4 may be provided as necessary and may be omitted. Even in that case, if at least the first component 2 and the second component 3 are provided, an effect that it is possible to adjust to an optimal reception sensitivity according to the intensity of the broadcast wave can be obtained.

[0095] 4. First Modification Next, a first modification of the broadcast reception antenna device 1 according to the embodiment will be described. FIG. 4 is a top view showing a first modification of the broadcast reception antenna device 1 according to the embodiment.

[0096] Hereinafter, the first modification will be described. In the following description, the description will focus on the differences from the above embodiment, and the description of the same matters will be omitted. In FIG. 4, the same matters as those in the above embodiment are denoted by the same reference numerals.

[0097] The broadcast reception antenna device 1 shown in FIG. 4 is the same as the broadcast reception antenna device 1 shown in FIG. 1, except that the first component 2 has a first engaging portion 25, the second component 3 has a second A engaging portion 35A and a second B engaging portion 35B, and the third component 4 has a third engaging portion 45.

[0098] The first component 2 shown in FIG. 4 has two first engaging portions 25 provided at the end of the first substrate 21 on the +X axis side. The first engaging portion 25 shown in FIG. 4 is a concave portion that opens at the end of the first substrate 21 on the +X axis side. On the other hand, the second component 3 shown in FIG. 4 has two second A engaging portions 35A provided at the end of the second substrate 31 on the -X axis side. The second A engaging portion 35A shown in FIG. 4 is a convex portion that protrudes from the end of the second substrate 31 on the -X axis side and can engage with the first engaging portion 25.

[0099] Figure 4 shows a state in which the first engaging portion 25 and the second A engaging portion 35A are engaged. In Figure 4, the form in which the convex portion fits into the concave portion is defined as "engagement". By this engagement, the first component 2 and the third component 4 are integrated in the X-Y plane. As a result, in the first component 2 and the second component 3, their positions can be aligned with high precision and maintained. Consequently, a decrease in the operation gain due to misalignment between components can be suppressed. Also, since the engagement operation is relatively simple, it can contribute to facilitating the assembly work.

[0100] Note that the number of the first engaging portions 25 provided in the first component 2 is not limited to two, and may be one or three or more. However, if there are a plurality of them, the relative positional accuracy can be further improved. The same applies to the number of the second A engaging portions 35A provided in the second component 3.

[0101] Also, the form of the engagement is not limited to the form shown in Figure 4. Since the engagement can be realized by any mechanism in which the first component 2 and the second component 3 are engaged with each other, the specific form is not particularly limited. For example, forms of the engagement include fitting of a hole and a protrusion, clamping using an elastic body such as a clip, fixing via an adhesive, an adhesive agent, an adhesive tape, an adhesive tape, a hook-and-loop fastener, lamination using a coating material, accommodation in a laminated substrate, etc. Any of these forms can fix the first component 2 and the second component 3 to each other.

[0102] On the one hand, after the first engaging portion 25 and the second A engaging portion 35A engage with each other, it is preferable that they can be disengaged. Thereby, for example, even when removing the once-installed first component 2 and second component 3 for some reason, the operation can be performed efficiently. For example, after installing the broadcast receiving antenna device 1, if the received intensity is different from the assumed broadcast wave intensity, it is necessary to change the operating gain of the broadcast receiving antenna device 1. Even in such a case, if the engagement can be released, the work efficiency can be improved. Further, it is preferable that the first engaging portion 25 and the second A engaging portion 35A after disengagement are in the same state as before engagement. That is, it is preferable that the first engaging portion 25 and the second A engaging portion 35A are in a form that does not cause modifications such as damage due to disengagement. Thereby, since they can be engaged again or disengaged again, it becomes possible to attempt reinstallation any number of times.

[0103] Note that, for example, the engagement form shown in FIG. 4 is a form in which a convex portion fits into a concave portion, so it is a form that can be disengaged and does not cause modifications due to disengagement.

[0104] The second component 3 shown in FIG. 4 has two second B engaging portions 35B provided at the end of the second substrate 31 on the plus side of the X axis. The second B engaging portion 35B shown in FIG. 4 is a concave portion that opens at the end of the second substrate 31 on the plus side of the X axis. On the other hand, the third component 4 shown in FIG. 4 has two third engaging portions 45 provided at the end of the third substrate 41 on the minus side of the X axis. The third engaging portion 45 shown in FIG. 4 is a convex portion protruding from the end of the third substrate 41 on the minus side of the X axis and can engage with the second B engaging portion 35B. By having such second B engaging portions 35B and third engaging portions 45, in the second component 3 and the third component 4, their positions can be aligned with high accuracy and maintained. As a result, a decrease in the operating gain due to misalignment between components can be suppressed. Also, since the engagement operation is relatively simple, it can contribute to facilitating the assembly work.

[0105] Regarding the configurations of the second B engaging portion 35B and the third engaging portion 45, they are the same as the configurations of the first engaging portion 25 and the second A engaging portion 35A.

[0106] Note that the number of the second engaging portions 35B of the second component 3 is not limited to two, and may be one or three or more. However, if there are a plurality of them, the positional accuracy between them can be further improved. The same applies to the number of the third engaging portions 45 of the third component 4.

[0107] Also, in FIG. 4, although omitted, the third component 4 may further have an engaging portion that can engage with other components (not shown). That is, similar to the second component 3, the third component 4 may have two convex portions and two concave portions. Even in the first modification example as described above, the same effects as those of the above-described embodiment can be obtained.

[0108] Also, the first component 2 is also the component 10 for a broadcast receiving antenna device according to the embodiment. The component 10 for a broadcast receiving antenna device has a first engaging portion 25 on the plus side of the X axis of the first waveguide element 24. Therefore, when connecting the second component 3 to the plus side of the X axis of the component 10 for a broadcast receiving antenna device, it can be accurately connected using the first engaging portion 25. Therefore, in the component 10 for a broadcast receiving antenna device, by selecting whether or not to connect the separately prepared second component 3, the operation gain can be easily adjusted. In addition, since the component 10 for a broadcast receiving antenna device is small and thin in the state before connection and has portability and workability, it can be easily installed even in a narrow space.

[0109] 5. Second Modification Example Next, a second modification example of the broadcast receiving antenna device 1 according to the embodiment will be described. FIG. 5 is a top view showing a second modification example of the broadcast receiving antenna device 1 according to the embodiment.

[0110] Hereinafter, the second modification example will be described. In the following description, the description will focus on the differences from the above-described embodiment, and the description of the same matters will be omitted. In FIG. 5, the same matters as those in the above-described embodiment are denoted by the same reference numerals.

[0111] In the broadcast receiving antenna device 1 shown in FIG. 5, it is the same as the above-described embodiment except that the first component 2 has two element groups 20, and the second component 3 and the third component 4 have waveguide elements corresponding to the number of element groups 20.

[0112] The first component 2 shown in FIG. 5 has two element groups 20 each composed of the above-described radiation element 22, reflection element 23, and first waveguide element 24. As a result, the first component 2 has two standing wave antennas arranged in parallel. As a result, the first component 2 becomes a so-called stacked antenna. The stacked antenna contributes to enhancing the directivity and operating gain.

[0113] In FIG. 5, the distance between the element groups 20 is denoted as S20-20. The distance S20-20 is the distance between the intermediate lines in the Y-axis direction of the element groups 20. By ensuring that the distance S20-20 is long, the directivity and operating gain of the broadcast receiving antenna device 1 can be enhanced. Specifically, it is preferably (1 / 2)λ or more, and more preferably (3 / 4)λ or more. Thereby, the directivity and operating gain can be sufficiently enhanced. On the other hand, considering that the broadcast receiving antenna device 1 may become too large and may impair portability and appearance, the upper limit value of the distance S20-20 is preferably 3λ or less, and more preferably 2λ or less.

[0114] The second component 3 has two of the above-described second waveguide elements 34. As a result, the second component 3 can add one second waveguide element 34 to each of the above-described two element groups 20. As a result, the operating gain of the above-described stacked antenna can be enhanced. In the stacked antenna, since it is necessary to match the phases of the signals output from each standing wave antenna, it is preferable to make the configurations of each standing wave antenna the same. Therefore, the second component 3 preferably has a second waveguide element 34 that is an integral multiple of the number of element groups 20. Specifically, in FIG. 5, two second waveguide elements 34 are shown. In this case, it is one times the number (two) of the element groups 20. Also, when further improving the directivity and operating gain, the second component 3 may have four or more second waveguide elements 34 that are two times the number of element groups 20.

[0115] The third component 4 has two of the above-described third waveguide elements 44. As a result, the third component 4 can add one third waveguide element 44 to each of the above-described two element groups 20 and two second waveguide elements 34. As a result, the operating gain of the stacked antenna described above can be further increased. Also, similar to the second component 3, the third component 4 preferably has a number of third waveguide elements 44 that is an integer multiple of the number of element groups 20.

[0116] Note that the number of stacks of the above-described stacked antenna is 2, but the number of stacks may be 3 or more. That is, the first component 2 may have three or more element groups 20.

[0117] Also, in FIG. 5, the two element groups 20 are provided on the upper surface 212 of the same first substrate 21, but the first substrate 21 may be divided into two. In this case, the two divided substrates may be engageable and disengageable with each other via an engaging portion (not shown). Thereby, even in the case of a stacked antenna, the portability and the workability can be further enhanced. Even in the second modification as described above, the same effects as those of the above-described embodiment can be obtained.

[0118] 6. Usage method Since the broadcast reception antenna device 1 according to the embodiment has the first component 2, the second component 3, and the third component 4 separated from each other, during storage and transportation, they can be stacked on each other, etc., to shorten the total length in the X-axis direction. As a result, the handleability can be improved, and for example, it can be easily carried into and installed in a narrow space. For this reason, the broadcast reception antenna device 1 can be easily installed even in a space that is difficult to access, such as an attic. Also, since the broadcast reception antenna device 1 is thin, it can be suppressed that the appearance is damaged or it becomes an obstacle after installation.

[0119] The broadcast reception antenna device 1 is used, for example, for receiving terrestrial digital broadcast waves in the frequency range of 470 MHz or higher and 710 MHz or lower. As a result, it becomes possible to install a reception antenna device for terrestrial digital broadcast that is adjusted to optimal reception sensitivity without impairing the appearance, even for a house or the like where the installation location is limited. As a result, television broadcasts can be received at a good reception level.

[0120] FIG. 6 is a cross-sectional view showing a state in which the broadcast reception antenna device 1 according to the embodiment is installed in the attic AT of the house H1.

[0121] The house H1 shown in FIG. 6 is an example of a house H1 (building) having an attic AT. The attic AT is a space surrounded by a ceiling CE and a roof RF. Since the attic AT is a space that is not normally visible to the occupants, the appearance is not impaired even if the broadcast reception antenna device 1 is installed. In addition, the attic AT is a space with little influence from wind and rain, attenuation of broadcast waves due to the outer wall, heat-insulating windows, or neighboring houses, etc. Therefore, by installing the broadcast reception antenna device 1 in the attic AT, a high radio wave intensity can be stably obtained without impairing the appearance of the house H1. Furthermore, since the attic AT is more accessible than on the roof RF, the installation work of the broadcast reception antenna device 1 can be easily performed. Also, since the attic AT is close to the room RO where the occupants live, the laying distance of the antenna wire can be shortened. As a result, the installation work of the antenna wire can be easily performed, and signal attenuation can be suppressed.

[0122] FIG. 7 is a cross-sectional view showing a state in which the broadcast reception antenna device 1 according to the embodiment is installed between the roof RF (structural material) and the waterproof sheet WP of the house H2.

[0123] The house H2 shown in FIG. 7 is an example of a house H2 (building) having a waterproof sheet WP laid on the roof RF. Since the roof RF shown in FIG. 7 has a flat shape, a waterproof sheet WP is usually laid. Therefore, the broadcast reception antenna device 1 shown in FIG. 7 is installed between the roof RF (structural material) and the waterproof sheet WP.

[0124] Since the broadcast reception antenna device 1 is thin, even when installed in such a location, the influence on the waterproof property by the waterproof sheet WP can be minimized. On the other hand, since such a location has little attenuation of broadcast waves, it is also a location where high radio wave intensity can be stably obtained in the broadcast reception antenna device 1. Note that arbitrary members may be interposed between the roof RF and the broadcast reception antenna device 1, and between the broadcast reception antenna device 1 and the waterproof sheet WP, respectively.

[0125] Also, the installation location of the broadcast reception antenna device 1 is not limited to the above location. The installation location of the broadcast reception antenna device 1 may be, for example, inside the room RO, or inside a structural material such as the roof RF or the ceiling CE, and is not limited to a building. For example, it may be inside or outside a moving body such as an automobile, a train, or a ship.

[0126] 7. Effects exhibited by the above-described embodiment and the modification The broadcast reception antenna device 1 according to the above-described embodiment and the modification includes a first component 2 and a second component 3. The second component 3 is separate from the first component 2 and is provided adjacent to the first component 2. The first component 2 has a first substrate 21, a radiating element 22, a reflecting element 23, and a first waveguide element 24. The reflecting element 23, the radiating element 22, and the first waveguide element 24 are provided on the first substrate 21 so as to be arranged in this order. The second component 3 has a second substrate 31 and a second waveguide element 34. The second substrate 31 is provided adjacent to the first substrate 21. The second waveguide element 34 is provided on the second substrate 31 on the side opposite to the radiating element 22 of the first waveguide element 24.

[0127] According to such a configuration, since the first component 2 and the second component 3 are separate from each other, portability and workability are excellent. Also, by selecting the presence or absence of the second component 3, the operating gain can be adjusted. For this reason, a broadcast reception antenna device 1 that can be easily installed in a narrow space and whose reception sensitivity can be easily changed can be obtained.

[0128] Further, the first component 2 may have a first engaging portion 25 provided on the first substrate 21. Furthermore, the second component 3 may be provided on the second substrate 31 and have a second A engaging portion 35A that engages with the first engaging portion 25.

[0129] According to such a configuration, in the first component 2 and the second component 3, their positions can be aligned with high precision and the positions can be maintained. As a result, a decrease in the operation gain due to misalignment can be suppressed.

[0130] Also, the first engaging portion 25 and the second A engaging portion 35A may be in a form that allows the engagement to be released after they engage with each other.

[0131] According to such a configuration, for example, even when the first component 2 and the second component 3 that have been once installed are removed for some reason, the work can be performed efficiently.

[0132] Also, the constituent materials of the first substrate 21 and the second substrate 31 are preferably resin materials. According to such a configuration, the first component 2 and the second component 3 can be made lighter.

[0133] Also, the broadcast receiving antenna device 1 according to the above embodiment and the modification may include a third component 4. The third component 4 is separate from the first component 2 and the second component 3 and is provided adjacent to the second component 3. Further, the third component 4 has a third substrate 41 provided adjacent to the second substrate 31 and a third waveguide element 44 provided on the third substrate 41. And the third waveguide element 44 is provided on the side opposite to the first waveguide element 24 of the second waveguide element 34.

[0134] According to such a configuration, the operation gain of the broadcast receiving antenna device 1 can be further increased compared to the case where it is composed of only the first component 2 and the second component 3.

[0135] Further, the second component 3 may have a second B engaging portion 35B provided on the second substrate 31. Furthermore, the third component 4 may be provided on the third substrate 41 and have a third engaging portion 45 that engages with the second B engaging portion 35B.

[0136] According to such a configuration, in the second component 3 and the third component 4, their positions can be aligned with high precision and maintained. As a result, a decrease in the operation gain due to misalignment between components can be suppressed.

[0137] Also, the broadcast receiving antenna device 1 according to the above embodiment and the modification is preferably used for receiving radio waves with a frequency of 470 MHz or higher and 710 MHz or lower.

[0138] According to such a configuration, even for a house or the like with limited installation space, a receiving antenna device for terrestrial digital broadcasting adjusted to an optimal reception sensitivity can be realized without damaging the appearance. Thereby, television broadcasting can be received at a good reception level.

[0139] Also, the broadcast receiving antenna device 1 according to the above embodiment and the modification is installed in the attic AT of the building.

[0140] Since the attic AT is usually a space that is not visible to the residents, even if the broadcast receiving antenna device 1 is installed, the appearance is not damaged. Also, the attic AT is a space with less influence of wind and rain, less attenuation of broadcast waves by the outer wall, heat-insulating windows, and neighboring houses. Therefore, by installing the broadcast receiving antenna device 1 in the attic AT, a high radio wave intensity can be stably obtained without damaging the appearance of the house H1 (building). Furthermore, since the attic AT is more accessible than on the roof RF, the installation work of the broadcast receiving antenna device 1 can be easily performed. Also, since the attic AT is close to the room RO where the residents live, the laying distance of the antenna wire can be shortened. Thereby, the installation work of the antenna wire can be easily performed, and signal attenuation can be suppressed.

[0141] Further, the broadcast reception antenna device 1 according to the embodiment and the modification example is installed between the roof RF (structural material) of the building and the waterproof sheet WP.

[0142] Since the broadcast reception antenna device 1 is thin, even when installed in such a place, the influence on the waterproof property by the waterproof sheet WP can be minimized, and the appearance of the house H2 (building) is hardly damaged. On the other hand, since such a place has little attenuation of broadcast waves, a high radio wave intensity can be stably obtained in the broadcast reception antenna device 1.

[0143] Further, the first component 2 may have a plurality of element groups 20 each composed of a radiation element 22, a reflection element 23, and a first waveguide element 24. Furthermore, the second component 3 may have second waveguide elements 34 that are an integral multiple of the number of element groups 20.

[0144] According to such a configuration, the first component 2 can be a stacked antenna. Thereby, the directivity and the operating gain of the broadcast reception antenna device 1 can be increased.

[0145] The component 10 for a broadcast reception antenna device according to the embodiment has a first substrate 21, a radiation element 22, a reflection element 23, a first waveguide element 24, and a first engaging portion 25. The reflection element 23, the radiation element 22, the first waveguide element 24, and the first engaging portion 25 are provided on the first substrate 21 so as to be arranged in this order. Further, the first engaging portion 25 can be engaged with a second A engaging portion 35A of another component.

[0146] According to such a configuration, a component 10 for a broadcast reception antenna device can be obtained that can be easily installed in a narrow space and can realize a broadcast reception antenna device 1 whose reception sensitivity can be easily changed.

[0147] As described above, the broadcast reception antenna device and the component for the broadcast reception antenna device of the present invention have been described, but the present invention is not limited to the above embodiment and modification example.

[0148] For example, the broadcast receiving antenna device and parts for the broadcast receiving antenna device of the present invention may have arbitrary configurations added to the above-described embodiments and modification examples. Further, the embodiments of the present invention may be in a form in which a first modification example and a second modification example are combined.

Explanation of Reference Numerals

[0149] 1 Broadcast receiving antenna device 2 First part 3 Second part 4 Third part 10 Parts for broadcast receiving antenna device 20 Element group 21 First substrate 22 Radiating element 22a Element conductor 22b Element conductor 23 Reflecting element 24 First waveguide element 24a Element conductor 24b Element conductor 24c Element conductor 24d Element conductor 25 First engaging part 31 Second substrate 34 Second waveguide element 34a Element conductor 34b Element conductor 34c Element conductor 34d Element conductor 35A Second A engaging part 35B Second B engaging part 41 Third substrate 44 Third waveguide element 44a Element conductor 44b Element conductor 44c Element conductor 44d Element conductor 45 Third engaging part 211 Bottom surface 212 Top surface 311 Bottom surface 312 Top surface 411 Bottom surface 412 Top surface AT Attic CE Ceiling H1 Residence H2 Residence L22 Length L23 Length L24 Length L24d Length L34 Length L34a Length RF Roof RO Room S20-20 Spacing S22-23 Spacing S22-24 Spacing S24-24 Spacing S24-34 Spacing S34-34 Spacing WP Waterproof Sheet W22 Width W23 Width W24 Width W34 Width t21 Thickness t22 Thickness

Claims

1. A first component, A second component that is separate from the first component and is provided adjacent to the first component, and comprising, The first component is A first substrate, A radiation element provided on the first substrate, A reflection element provided on the first substrate, A first waveguide element provided on the first substrate, and having, The reflection element, the radiation element, and the first waveguide element are provided so as to be arranged in this order, The second component is A second substrate provided adjacent to the first substrate, A second waveguide element provided on the second substrate, and having, The second waveguide element is provided on the side opposite to the radiation element of the first waveguide element. A broadcast receiving antenna device characterized by this.

2. The first component has a first engaging portion provided on the first substrate, The second component has a second A engaging portion provided on the second substrate and engaging with the first engaging portion. The broadcast receiving antenna device according to claim 1.

3. The first engaging portion and the second A engaging portion are in a form in which the engagement can be released after engaging with each other. The broadcast receiving antenna device according to claim 2.

4. The constituent materials of the first substrate and the second substrate are resin materials. The broadcast receiving antenna device according to any one of claims 1 to 3.

5. A third component that is separate from the first component and the second component and is provided adjacent to the second component, The third component is A third substrate provided adjacent to the second substrate, A third waveguide element provided on the third substrate, having, The broadcast receiving antenna device according to any one of claims 1 to 3, wherein the third waveguide element is provided on the side opposite to the first waveguide element of the second waveguide element.

6. The second component has a second B engaging portion provided on the second substrate, The broadcast receiving antenna device according to claim 5, wherein the third component is provided on the third substrate and has a third engaging portion that engages with the second B engaging portion.

7. The broadcast receiving antenna device according to any one of claims 1 to 3, which is used for receiving radio waves having a frequency of 470 MHz or more and 710 MHz or less.

8. The broadcast receiving antenna device according to any one of claims 1 to 3, which is installed in the attic of a building.

9. The broadcast receiving antenna device according to any one of claims 1 to 3, which is installed between a structural member of a building and a waterproof sheet.

10. The first component has a plurality of element groups each composed of the radiating element, the reflecting element, and the first waveguide element, The broadcast receiving antenna device according to any one of claims 1 to 3, wherein the second component has a number of the second waveguide elements that is an integral multiple of the number of the element groups.

11. a first substrate, a radiating element provided on the first substrate, a reflecting element provided on the first substrate, a first waveguide element provided on the first substrate, a first engaging portion provided on the first substrate and engageable with a second A engaging portion of another component, having, A component for a broadcast receiving antenna device, characterized in that the reflecting element, the radiating element, the first waveguide element, and the first engaging portion are provided in this order.

Images