JPS62104205A - High frequency antenna system for building - Google Patents

Abstract

PURPOSE:To obtain an antenna system not losing the beautiful appearance of a building by providing a high frequency pickup where antennas are arranged lengthwise to a conductive structure and detecting a high frequency current induced in the structure by a broadcast wave and lowing concentratingly to the structure ride. CONSTITUTION:The magnetic flux generated from the high frequency surface current flowing to the ridge of an iron beam 30 is caught surely by a loop antenna 38 and fed to a receiver via an impedance matching circuit 44. A case 40 shields an external magnetic flux and is so constituted that the current induced in the beam 30 is detected efficiently by a high frequency pickup 28. The case 40 of the high frequency pickup 28 is fixed tightly to the beam 30. The loop antenna 38 is a single winding antenna, insulation film is applied to the coil so that the coil is insulated electrically from the beam 30 and arranged closely while adopting the conductive structure pressed onto the beam 30, then the magnetic flux caused from the surface current is interlinked more strongly with the loop antenna 38.

Description

[Detailed Description of the Invention] [Field of Industrial Application] The present invention relates to a high-frequency antenna device for buildings, and in particular, to effectively detect broadcast waves transmitted from a broadcasting station or communication waves transmitted from other stations. The present invention relates to a high-frequency antenna device for buildings that supplies detection signals to various types of receivers.

[Prior Art] An antenna device for receiving various broadcast waves, such as broadcast communication waves from radio, television, telephone, etc., with a receiver installed indoors is well known, and is also used for communication with other private stations. This type of antenna device is also used for transmitting and receiving, for example, citizen's radio waves, and can receive audio and image signals carried by radio waves in various frequency bands.

Dipole antennas, Yagi antennas, etc. are known as conventional general antenna devices, and dipole antennas are made by arranging two conductive wires of equal length in a straight line and connecting a feeder line to the center, reducing the total length by half. The Yagi antenna is an antenna in which a waveguide and a reflector are attached before and after the dipole antenna to give it directivity.

In addition to these outdoor antennas, there are also indoor antennas, but the reception sensitivity is poor, and even when anti- and na-side antennas are installed, they get in the way of furniture, etc., making them impractical. , is hardly used at present. Therefore, antennas are installed on the roofs of houses or buildings to ensure good reception of radio waves.

[Problems to be Solved by the Invention] Problems with the Prior Art However, conventional antennas that are mounted on the roof or on the rooftop are casually installed, ignoring the appearance of the house or building. There was a problem in that it severely damaged the beauty of the area and even disturbed the landscape of the town.

In addition, antennas installed on roofs or rooftops are constantly exposed to wind and rain, so they deteriorate quickly due to rust, etc.
Furthermore, since there is a risk of the antenna falling over in a typhoon or strong winds, there was a request for an antenna that would not be installed casually protruding from the building.

Purpose of the Invention The present invention has been made in view of the above-mentioned conventional problems.
The purpose is to provide a high-frequency antenna device for buildings that effectively detects high-frequency surface currents induced in conductive structures of buildings by broadcast waves and does not impair the aesthetic appearance of buildings. .

[Means and Effects for Solving the Problems] In order to achieve the above object, the present invention provides an antenna disposed along the longitudinal direction of a conductive structure having a predetermined length used in a building. The present invention is characterized in that a high-frequency pink-up is provided to detect high-frequency surface currents induced in the structure by broadcast waves and concentrated at the edges of the structure.

In recent years, conductive +M structures have been used as building structures, such as frame units such as steel frames and steel pipes, or their accessories, such as braces, and incoming radio waves generate surface currents on these conductive structures. It is expected that this surface current will flow concentrated at the edges of the structure.

Therefore, if this high frequency surface current at the edge of the 14 structure is effectively detected, good reception of broadcast waves, etc. will be possible.

Further, the conductive +A structure having a predetermined length used in the building may be used not only for the frame unit, but also for metal roof panels, windows or metal fittings, and the eaves of the structure. The metal decorative materials used in the above-mentioned high-frequency vinyl 1. Kur 1. It is suitable for installing a bar.

In the present invention, the FM frequency band or higher, that is, 50Ml
In order to reliably detect high-frequency surface currents with a frequency of 1z or higher, the loop antenna of the pickup is installed at the edge of the structure as an electromagnetic coupling type high-frequency pickup.
30/r[LL1] (C-speed of light, "-broadcast wave) carrier frequency", and can electromagnetically detect magnetic flux generated by high-frequency current.

In addition, a capacitive type that forms a capacitance between the edge of the structure and a detection electrode serving as an antenna to electrostatically detect a high frequency signal, or a sliding core coil type high frequency pink-up can be used to detect high frequency signals on a high frequency surface. Current can be detected efficiently.゛[Examples] Preferred embodiments of the present invention will be described below based on the drawings.

FIG. 5 shows a steel frame as a conductive structure forming the framework of a building, and the third embodiment is characterized in that a high frequency pickup is provided in this steel frame.

This high frequency pink up (28A, 28B.

28C, etc.) is installed at an appropriate location on the upper part of the structure, for example, on the beam, as shown in the figure, but it is necessary to select the antenna installation position with the best distribution characteristics of high-frequency surface current. The process of determining the antenna installation position will be explained based on FIGS. 6 to 8.

FIG. 6 shows a probe P that detects a high frequency surface current flowing through a structure, and this probe P is basically the same as a high frequency pickup to be described later. That is, in order to avoid mixing of radio waves from the outside, a loop coil 12 is fixed inside a case 10 made of a conductor, and a part of the case 10 is provided with an opening 10a, and a part of the loop coil 12 is fixed inside the case 10. The opening 10a is exposed to the outside, and the exposed portion of the loop coil 12 is brought close to the surface of the structure to transfer the magnetic flux generated from the TG potting body surface current to the loop coil 12.
consists of the configuration detected by

A part of this loop coil 12 is connected to the case 10 by shorting wires L and 4, and is also connected to the output end 16 or the core wire 20 of the coaxial cable 18.

A capacitor 22 is provided in a part of the loop coil 12, and the frequency of the loop coil 12 is resonated to a desired constant frequency, thereby increasing the pickup efficiency.

Suitable pickups of this type include those developed as antenna devices for vehicles, such as those disclosed in Japanese Utility Model Application No. 60-1008 or Japanese Patent Application No. 59-258-949.

By moving such a probe P consisting of (1) along the surface of the structure and rotating its angle at each measurement point, the surface current distribution on the surface of the structure and its direction I'm looking for accuracy.

That is, the output of the probe P is amplified by the high frequency voltage amplifier 24, and the output voltage is measured by the high frequency voltage measuring device 26.

This coil output voltage can be read using the meter support value of the measuring device 26, and the setting position of the high frequency pickup can be determined based on this meter support value.

FIG. 7 shows the declination angle θ between the high-frequency surface current I and the loop coil 12 of the probe P. As shown in the figure, the magnetic flux φ due to the current I interlinks with the loop coil 12, so that the loop coil 12 - Generate detection 1 crushing pressure ■. Then, as shown in FIG.
Since the maximum type 11E is obtained when performing the measurement, by rotating the probe P at each measurement point, it is possible to know the direction of the surface current (2) when the maximum voltage is applied.

In this way, the installation position of the high-frequency pickup can be determined, but at the same time, it is also possible to know how far the loop coil 12 can be separated from the edge of the structure using this probe P even by one pin. can.

Figure 9 shows the distribution characteristics of FM broadcast waves of flOMllz, and the surface current value decreases as the distance from the edge of the structure increases, and the surface current value decreases below 6 dB, where good sensitivity can actually be obtained. Considering the current reduction range, it is understood that practically sufficient antenna characteristics can be obtained if the antenna is placed within 4.5 em from the edge of the structure.

Similar results are obtained for the separation distance of the loop antenna 12 in various frequency bands, and according to computer simulations and various experimental results, the practical separation distance is inversely proportional to the frequency, and the structure edge color , 12X
It became clear that the difference was within 10""c/f' [ml (c - speed of light, f = carrier frequency of broadcast wave), and the antenna of the modified frequency pickup was set within the above separation distance from the edge of the structure. By doing so, it is possible to obtain a good receiving effect according to each carrier frequency.

For example, at a carrier frequency of 100 Mz, the separation distance depends on the frequency, so according to the above formula, it is sufficient to provide the high frequency pickup within 3.Gems, and as the carrier frequency f increases, the high frequency pickup loop The antenna will be installed very close to the edge.

1 and 2 show a preferred embodiment of the present invention, in which the high frequency pickup 28 is a structure
It is provided on the steel beam 30 of the mold. In the figure, a steel beam 30 is attached to a column 32 via a connecting steel plate 34, and the column 32 and the steel beam 30 are firmly assembled with reinforcing rods 36 that cross the steel frame set in a quadrilateral shape. There is.

The high frequency pickup 28 is attached to the lower end of an H-shaped steel beam 30 along its length, and the details of its attachment are shown in FIG.

The high frequency pickup 28 in the embodiment is of an electromagnetic coupling type, and the loop antenna 38 detects magnetic flux generated by high frequency surface current. As shown in FIG. 2, this case 4 having the loop antenna 38
0 is provided with an opening 40a through which the longitudinal force-directing piece of the loop antenna 38 is exposed. It is fixed to the steel beam 30 with bolts and nuts 42.

Further, an impedance matching circuit 44 is connected to the loop antenna 38, and this impedance matching circuit 44 is connected to a cable connector 45 so as to supply received broadcast waves to the receiver via the cable connector 45. It has become.

Therefore, the magnetic flux generated from the high frequency surface current flowing at the edge of the iron 11 beam 30 is reliably captured by the loop antenna 38 and supplied to the receiver via the impedance matching circuit 44.

Further, the case 40 is configured to shield magnetic flux from the outside so that the current induced in the steel beam 30 is efficiently detected by the high frequency pickup 28.

The case 40 of this high frequency pickup 28 is made of steel beam 3
For this purpose, L-shaped brackets 46 are provided at both ends of the case 40, and the brackets 46 at both ends are fixed to the steel beam 32 by tightening bolts and nuts 42. There is.

In such a high frequency pickup 28, the loop antenna 38 consists of a single-winding antenna, and the coil is insulated so that it is electrically insulated from the steel beam 30 and arranged in close contact with it. If the conductive structure is pressed against the steel beam 30, the magnetic flux generated from the surface current can be more strongly linked to the loop antenna 38.

In addition, in the embodiment, case 4 of this loop antenna 38
The piece exposed from 0 is 4.5c from the edge of the steel beam 30
Therefore, broadcast waves in the FM band, VHF band, or UHF band of 80 M11z or more can be reliably detected from the high frequency surface current flowing at the edge of the steel beam 30.

As described above, according to the first embodiment of the present invention, the loop antenna 38 of the high frequency pickup 28 is arranged in the longitudinal direction or along the edge of the steel beam 30, and
By electromagnetically detecting the high frequency surface current flowing at the edge of the antenna, it is possible to reliably receive broadcast waves in the high frequency band.

Note that the high-frequency pickup 28 is not limited to the beam, but can be attached to the main pillar, or to these beams, or to an accessory such as a brace that reinforces the main pillar. A possible location will be selected.

The installation of the high frequency pickup according to the present invention can be carried out with reference to, for example, Japanese Patent Application Laid-Open No. 61-112403 or Japanese Patent Application No. 59-250345, which were developed for automobile use.

3 and 4 show a second embodiment of the present invention, in which a high frequency pickup 128 is provided at an open end 50 of a steel pipe column 48 as a conductive structure.

The high frequency pickup 128 is mounted above the ridge corner of the steel pipe column 48 forming the structure of the building, and the loop antenna 13g is arranged along the open end 50, as shown in FIG. Set up Therefore, an opening 140a is formed in the case 140 on the side of the opening end 50,
A loop antenna 138 coated with insulation is placed in close contact with the antenna.

In the second embodiment, the loop antenna 138 is placed at a distance of 12xlO-3c/f'[le] from the other surface A (FIGS. 3 and 4) on which the high-frequency pickup 128 is not attached at the ridge. are arranged, thereby making it possible to efficiently pick up the surface current flowing concentratedly at the ridge corner of the steel pipe column 48.

In this way, the high frequency surface current detected by the loop antenna 138 is transferred to the impedance matching circuit 144.
and this impedance matching circuit 144
The output of is supplied to the receiver via cable connector 45.

Therefore, it is possible to efficiently receive broadcast waves sent by radio waves in the high frequency band, and it is possible to obtain good reception conditions for radio broadcasts and television broadcasts without using conventionally used dipole antennas or Yagi antennas. can.

In the above embodiments, an electromagnetically coupled pickup is used as the high frequency pickup), but the characteristic feature of the present invention is to efficiently detect and broadcast high frequency surface currents induced in building structures. It is to receive radio waves such as waves, and as a high frequency pickup, not only an electromagnetic coupling type but also an electrostatic coupling type can be used.

In this capacitively coupled high-frequency pickup, a detection electrode as an antenna is arranged along the longitudinal direction of the edge of the structure in each of the above-mentioned figures through an air layer or an insulating plate, and the detection electrode is placed between the surface of the structure and the detection electrode. A high frequency surface current is extracted to the detection electrode side via the capacitance formed between the electrode and the high frequency signal in a desired band can be extracted.

Furthermore, in the present invention, a ferrite core coil type pickup can also be used as the high frequency pickup.
By arranging the ferrite cores close to each other with the longitudinal directions of the ferrite cores aligned with the longitudinal direction of the edge of the structure, it is possible to extract an induced current by a coil wound around the ferrite cores.

FIG. 10.11 shows a third embodiment of the high-frequency antenna device for buildings according to the present invention, in which the high-frequency antenna is installed on a roof as a conductive structure having a predetermined length used in a building. installed on the panel.

Figure 10 shows one of the entrance eaves 230 that protrudes from the upper side of the entrance E.
This is a picture of a prayer mask. Inside the entrance eaves 230, truss beams 232 formed into a right triangle shape are arranged at predetermined intervals in the longitudinal direction of the eaves 230. It is fixed to more protruding mounting bolts 236, 238. The mounting bolts 236, 238 are attached to their heads or to a support fitting 240 inside the building.
The supporting metal fittings 240 are welded and fixed to the first floor ceiling beam 242.
and bolted to the second floor beam 244. Truss beam 2
32 of the above-mentioned vertical IIT parts 234 are also screwed to horizontal timbers 246 in the building at their "secondary" parts.

Each of the above truss beams 232 fixed to the outer wall W in this way
A roof panel 250 is disposed on the slanted portion 248'' side so as to cover these. This roof panel 250 is an integrally molded aluminum product coated with acrylic, and the outer portion 250-1 is elevated in a substantially U-shape for both reinforcement and drainage.

The one-step portion 250-2 surrounded by the outer portion 250-1 is shaped interchangeably. Further, the lower edge thereof is concave and forms a machine portion 250-2a along the lower side of the roof panel 250. Vertical ribs 250-3 are formed protruding from the lower surface of the one-step portion 250-2 at predetermined intervals in the width direction,
The roof panel 250 is bolted to the inclined portion 248 of each truss beam 232 at the rib 250-3.

The upper edge of the roof panel 250 fixed with bolts is in contact with the building outer wall W, and a waterproof caulking material 2 is applied to the contact area.
52 is painted.

A field edge 254 arranged in a lattice pattern is arranged below the truss beam 232, and the field edge 254 connects each horizontal portion 256 of the truss beam 232 and has two rails bolted to the lower surface thereof. It is locked and fixed by a hanging member 258 in a structure that will be described in detail later.

An eave ceiling panel 260 is attached to the lower surface of the roof edge 254, and the eave ceiling panel 260 is flush with the entrance ceiling board E1.

The opening at the end of the entrance eaves 230 formed by the roof panel 250 and the eave ceiling panel 260 is covered with an eaves base panel 262 which also serves as a rain gutter.

The high frequency pickup 228, which is a feature of the present invention,
is the peripheral edge 250- of the metal roof panel 250 mentioned above.
4, and the high frequency pickup 228 in this embodiment is of an electromagnetic coupling type as shown in FIG. It is detected by antenna 264.

As shown in the figure, this loop antenna 26
4, this loop antenna 26
The loop antenna 264 is fixed to the truss beam 232 with a fixing member so that the loop antenna 264 is disposed close to the peripheral edge 250-4 of the roof panel 250 through the opening 266a. There is.

Further, a circuit section 268 is connected to the loop antenna 264, and the second circuit section 268 is connected to a cable connector (not shown) so as to supply received broadcast waves to the receiver via this cable connector. It has become.

Therefore, the magnetic flux generated from the high frequency surface current flowing in the peripheral portion 250-4 of the roof panel 250 is transferred to the loop antenna 250.
4 and is supplied to the receiver via circuitry 268.

Furthermore, the case 266 shields magnetic flux from the outside and directs the current induced in the roof panel 250 to the loop antenna 266.
4 is configured to be efficiently detected.

In such a high frequency pickup 228, the loop antenna 264 consists of a single-turn antenna, and the coil is coated with an insulating coating so that it is electrically insulated from the roof panel 250 and arranged in close contact with the roof panel 250. If the structure is pressed against the panel 250, the magnetic flux generated from the surface current can be more strongly linked to the loop antenna 264.

Note that the piece of the loop antenna 264 exposed from the case 266 is connected to the peripheral edge 250-4 of the roof panel 250.
．． In this example, J
It is placed in contact with the end face of the four-root panel 250. With this, it is possible to reliably detect broadcast waves in the FM band of 10MHz or higher, the TV VHF band, or UHFI'' by picking up the high-frequency surface current flowing in the peripheral portion of the roof panel 250.

As described above, according to the third embodiment of the present invention, the loop antenna 264 of the high frequency pickup 228 is arranged so that its longitudinal direction is along the peripheral edge 250-4 of the roof panel 250, and By electromagnetically detecting the high frequency surface current flowing through the channel 4, it is possible to reliably receive broadcast waves in the high frequency band.

According to the present invention, the high-frequency pickup can be installed at any location in a conductive structure having a predetermined length used in a building, and such a conductive structure As the body, it is possible to use not only the framework or roof panel of a building as shown in the above-described embodiments, but also various attached parts.

In particular, in recent years, metal materials have been widely used for building fittings and accessory parts, and not only steel-framed buildings but also wood-based buildings are known for their robustness, durability, and batch productivity in factories. Various electrically conductive members are used because they are good, and the high frequency pickup of the present invention can be easily installed in such electrically conductive structures.

A fourth embodiment of the invention is shown in FIGS. 12, 13 and 14, in which the high frequency pickup is designated by the numeral 328. In this embodiment, the high frequency pickup 328
is installed at the end of aluminum sash used as window frames in buildings.

In FIG. 12, the aluminum sash includes an upper sash 300 and a lower sash 302, and both sashes 300 and 302 are fitted and fixed together with side sashes (not shown) into the outer wall of two buildings to form a window or a sweeping section. There is.

A sliding glass door 30 is provided in both the satsushi 300 and 302.
4,306 is supported so that it can slide, and its 1
At the bottom, upper rails 308, 310 and lower sash 302 integrally project downward from the upper sash 300.
It is supported by lower rails 312, 314 that protrude upward from.

Both glass doors 304 and 306 have the same configuration, and according to this embodiment, each glass door 304 and 306 has a double glass structure in order to improve the heat and sound insulation effect of the window. To explain the glass door 306,
A fitted glass '316 is fixed watertight on the outdoor side.
Further, slide glasses 318 and 320 that can be slid in the glass door 306 in different ways are provided inside the glass door 306, so that when the slide glasses 318 and 320 are completely closed, the glass door 306 can be opened in two directions. It has a heavy glass structure, and when cleaning the airtight space 1i3I322 between both glasses, the cleaning action can be easily performed by sliding the slide glass 318 or 320.

The glass door 304 on the outside side has a similar double glass structure, so that the glass door of the embodiment has a heat insulation and 1ν
This makes it possible to significantly improve the soundproofing effect.

In this embodiment, an L-shaped bracket 300a is integrally formed on the upper surface of the upper sash 300, and the high frequency pickup 328 according to the present invention is firmly fixed to this bracket 300a.

The high frequency pickup 328 has a loop antenna 364 inside a substantially rectangular parallelepiped case 366 as shown in FIG.
and a built-in circuit section 368 electrically connected thereto,
The loop antenna 364 is connected to the opening 336 of the case 36δ.
A part of it is exposed.

As shown in FIG. 14, the case 366 is integrally formed with fixing tongues 366b and 336c.
As shown in FIG. 3, the upper sash 300 is firmly fixed to the bracket 300a with bolts 322 and nuts 324. Therefore, the loop antenna 3
64 is arranged along the edge of the bracket 300a of the upper sash 300, and due to this close arrangement,
The loop antenna 364 can effectively detect the high frequency surface current induced in the aluminum sash 300 by broadcast waves and flowing concentratedly at the edge of the sash.

Of course, in the present invention, the high frequency pickup 3
The aluminum sash on which the sash 28 is installed can be not only the upper sash 300 but also the lower sash 302 and, if necessary, the side sashes.

FIG. 15 shows a preferred fifth embodiment in which a high frequency pickup according to the present invention is arranged close to an eaves member.

-L beam 402 on the building side 400 in prefabricated houses, etc.
A field frame 406 is fixed to the frame 406 via an arm 404. This eaves frame 406 has a flange 408
A decorative board 410 is fixed to the outer side of the decorative board 410 via a soffit board 410, and a soffit board 416 is fixed to the lower end of the soffit board 416 via vertical studs 412 and support brackets 414. Said makeup tli2
Channel-shaped brackets 418 are fixed to both end surfaces of the soffit board 410 and the soffit board 416.

In such an eaves member, the eaves frame 406, flange 408, etc., which are internal structures, extend long along the eaves of a prefabricated house, and are likely to generate induced currents due to external radio waves. This is extremely suitable as a fixed position for a high frequency pickup.

In the fifth embodiment shown in FIG. 15, by providing a high frequency pickup 428 at the end of the flange 408, the high frequency surface current induced along the eaves frame 406 and the flange 408 can be effectively detected. .

The structure of the high frequency pickup 428 is, for example, the thirteenth
．． Since the structure is similar to that shown in FIG. 14, its details will be omitted.

FIG. 16 shows a sixth embodiment in which the high-frequency pickup according to the present invention is disposed close to a fascia cover that is a part of an eaves member.

The fascia cover is a member that mainly covers the eaves of a house, and as shown in FIG.
4 is covered by a fascia cover 506, and the fascia cover 506 in the embodiment is made of a thin metal plate.

In the embodiment, the fascia cover 506 is provided at the lower part of the eaves cover 508, and a drainage edge 510 is provided between the eaves cover 508 and the fascia cover 506, thereby preventing rainwater falling on the eaves cover 508. Since the water does not fall directly from the draining edge 510 curved at the lower end and is not transmitted to the fascia cover 506, it is possible to obtain good rain protection.

As is clear from FIG. 16, the high-frequency pickup 528 in this embodiment is fixed to the end of the bent part 506a folded inside the fascia cover 506, and thereby the fascia cover 506 that extends long toward the eaves is fixed to the end of the bent part 506a. It becomes possible to reliably detect the high frequency surface current flowing concentratedly at the edge.

FIG. 17 shows a seventh embodiment of the present invention, in which a high frequency pickup is disposed close to the fascia cover of the eaves member, similar to the sixth embodiment shown in FIG. 16 described above.

In the figure, a fascia plate 604 is arranged perpendicularly from a roof base material 602, and a high frequency pickup 628 is mounted on a fascia cover 606 provided on the outer surface of this fascia plate 604.
are placed close together.

In this embodiment, the high frequency pickup 628 is screwed to the fascia plate 604.

Note that a gutter 652 is fixed to the outside of the fascia cover 606 in the embodiment via a bracket 650.

FIG. 18 shows an eighth embodiment of the present invention, in which a high frequency pickup is placed close to a decorative panel on the roof.

In the figure, the roof panel 702 has metal fittings 704 marked with ]5.
A decorative curtain board 706 is fixed via the.

In the embodiment, the decorative curtain board 706 is divided into two parts: an upper board 70g and a dome 710. The upper plate 708 is firmly attached to the metal fitting 704 by its folded piece 708a and the U-shaped bracket 712, and similarly, the lower plate 710 is fixed firmly to the metal fitting 704 by its folded piece 708a and the U-shaped bracket 712.
The mounting is firmly fixed to the metal fitting 704 by a bracket 714 and a bracket 714 .

In this example, above! 12708 folding piece 70
A high frequency pickup 728 is fixed to 8a, and the upper plate 70
Frequency pickup 72 of the high frequency surface current flowing through 8 to 1
8 can be reliably captured and detected.

If such a decorative roof panel is used, the decorative panel itself is placed on the upper surface of the outside of the building, and since it is easy to receive radio waves and has a sufficiently long board length, it can effectively reduce the surface current caused by incoming radio waves. Suitable for direct flow.

FIG. 19 shows a ninth embodiment of the present invention, in which the high-frequency pickup is placed close to the edge of the roof shed.

In FIG. 19, the roofing material 802 is made of a sandwich panel material such as a Noricum boat, and edge materials 804 and 805 are provided at the edges of the roofing material 802.
Fitting portion 804a of the edge material 804°805 on the north lower side plate of
, 805a are fixed by rivets or caulking.

The edge members 804 and 805 are themselves made of metal, and a rain gutter 806 can be fitted and fixed to the outside thereof as shown.

In this embodiment, a mounting bracket 805b is integrally formed below the edge +, t 805, and the high frequency pickup 828 of this embodiment is disposed close to this bracket 805b.

Therefore, according to this embodiment, the high frequency pickup 828 can reliably detect the high frequency surface current induced in the conductive edge members 804 and 805 having a predetermined length.

20 and 21 show a tenth embodiment according to the present invention, in which a high frequency pickup is placed close to the end of the roof tile.

In both figures, tiles 906 are arranged in a row on a field member 902 with a waterproof sheet 904 in between.

6. On the edge of the tile 906, a shingle member 9 is used as an edge material to cover the end face of the tile 906 to prevent rainwater from entering and to decorate the exterior.
08 will be established. The shingle member 90g is made of a bent thin iron plate, covers its edge so as to embrace the six roof tiles 906, and its lower end is nailed to the field member 902.

In this embodiment, the high frequency antenna 928 is fixed to the lower surface of the field shrine 902 as shown in FIG.
They are placed fairly close together.

Therefore, the high-frequency pickup 928 can reliably detect the surface current flowing in the shingle member located in the first part of the building.

A specific receiving circuit for the high frequency pickup according to the present invention is disclosed in Japanese Patent Application No. 1983, for example. A circuit developed for automobiles as -236332 can be used.

[Effects of the Invention] As explained above, according to the present invention, the electrical conductivity of a building (1
The high-frequency surface current induced in the 14-structure is efficiently detected by a high-frequency pickup, so the FM band,
For broadcast waves such as UHF and VHF bands, a small antenna device can provide high-performance reception without having to erect a typical antenna on the roof or the like as in the past. I can do that.

As a result, antennas protruding from the outside can be removed without damaging the aesthetic appearance of buildings such as houses or buildings.

In addition, since the antenna device of the present invention does not need to be installed protruding outdoors, it is possible to obtain an extremely durable antenna device that does not rust due to rain and wind, and is an extremely safe device. I can do something.

[Brief explanation of drawings]

FIG. 1 shows a first example of an indoor high frequency antenna device according to the present invention.
This is a schematic configuration diagram of the embodiment, and is a perspective view showing a state in which a high frequency pickup is attached to a steel beam of a building. Fig. 2 is a cross-sectional view of the main part showing the state in which the high frequency pink-up is installed. Fig. 3 is the second part of the indoor high frequency antenna device according to the present invention.
Embodiment: A perspective view showing a state in which a high-frequency pickup is installed at the ridge corner of a steel pipe column; FIG. 4 is a cross-sectional view of a main part showing how the high-frequency pickup is installed in the second embodiment; FIG. 5 is a perspective view of a building. (Explanatory diagram showing the state in which the antenna device is attached to the steel frame body that is a dead body. Figure 6 is an explanatory diagram showing the state in which the antenna device is attached to the steel frame structure that is a corpse. An explanatory diagram of the probe and its processing circuit, Fig. 7 is an explanatory diagram showing the electromagnetic coupling state between the surface type iUt and the pickup loop antenna, and Fig. 8 is an explanatory diagram showing the directional characteristics of the loop antenna in Fig. 7. Figure 9 is a characteristic diagram showing the high frequency surface current distribution near the edge of the structure. Figure 10 is a cross section of the entrance eaves showing the third embodiment in which the high frequency pickup according to the present invention is installed on the roof panel. Figure 11 is a partially cutaway side view of the high frequency antenna device used in the third embodiment of Figure 10, and Figure 12 is a side view of the high frequency antenna device of the present invention in which the high frequency pickup according to the present invention is placed close to the aluminum sash. 13 is a partially cutaway side view of a high frequency pickup used in the fourth embodiment; FIG. 14 is a schematic perspective view of the high frequency pickup in the fourth embodiment; The figure is an explanatory diagram of a fifth embodiment in which the high-frequency pickup according to the present invention is placed close to the eaves shrine, and FIG. 16 is a sixth embodiment showing a state in which the high-frequency pickup according to the present invention is placed close to the fascia cover. FIG. 17 is an explanatory diagram of a seventh embodiment in which the high-frequency pickup according to the present invention is arranged close to the fascia cover, and FIG. 18 is an explanatory diagram of the seventh embodiment in which the high-frequency pickup according to the present invention is installed on the decorative thin plate of the roof. FIG. 19 is an explanatory diagram showing the ninth embodiment in which the high frequency pickup according to the present invention is provided on the edge material for roofing material, and FIG. A perspective view of the essential parts of the 10th embodiment installed on the wood. Figure 21 is a sectional view of the essential parts of the 10th embodiment. 28. 128, 228, 328, 428, 528°62
8.728,828.928 ... High frequency pickup 30 ... Chichikiri beam 38 as a structure ...
Loop antenna 48...Structure and C steel pipe column 250...House panel 300...Aluminum sash 406...Eave ceiling frame 506.606...Fascia cover 706...
- Decorative curtain board 804... 90g of edge material for the roof shrine... Keraba parts.

Claims (10)

[Claims] (1) A high-frequency pickup is installed along the longitudinal direction of a conductive structure with a predetermined length used in buildings, and high-frequency waves are induced in the structure by broadcast waves and flow concentrated at the edges of the structure. A high-frequency antenna device for buildings characterized by detecting surface current. (2) In the antenna device according to claim (1), the high frequency pickup includes a loop antenna, and the loop antenna has a distance of 12×10^-^3 from the edge of the structure.
A high-frequency antenna device for a building, characterized in that it is installed at a distance within c/f [m] (c = speed of light, f = carrier frequency of received broadcast waves). (3) A high-frequency antenna device for buildings according to any one of claims (1) and (2), characterized in that the high-frequency pickup is disposed close to the framework of the building. (4) In the antenna device according to any one of claims (1) and (2), the high-frequency antenna for a building is characterized in that the high-frequency pickup is disposed close to the peripheral edge of the metal roof panel. Device. (5) A high-frequency antenna device for buildings according to any one of claims (1) and (2), characterized in that the high-frequency pickup is disposed close to the aluminum sash. (6) The antenna device according to any one of claims (1) and (2), wherein the high-frequency pickup is disposed close to an eaves frame member of the building. . (7) The high-frequency antenna device for buildings according to claim (6), wherein the high-frequency pickup is disposed close to the fascia cover. (8) A high-frequency antenna device for buildings according to any one of claims (1) and (2), characterized in that the high-frequency pickup is disposed close to a decorative panel on a roof. (9) A high-frequency antenna device for buildings according to any one of claims (1) and (2), characterized in that the high-frequency pickup is disposed close to a roof edge material. (10) A high-frequency antenna device for buildings according to any one of claims (1) and (2), characterized in that the high-frequency pickup is disposed close to a shingle member of a roof tile.