A lighting device with a superior design incorporating a wireless communication device, a method for adjusting the angle of the antenna of the wireless communication device, a method for installing the antenna, a micro-foam sheet, and a light reflector that minimizes loss when radio waves of a predetermined wavelength are emitted at a wide angle.

Abstract

To provide an illumination device with a built-in wireless communication device, etc. excellent in efficiency of light extraction from an LED illumination device, capable of making brightness distribution more uniform by mitigating a difference in a brightness distribution of the light extracted from the illumination device in spite of being a direct illumination device, capable of enhancing the brightness of the illumination device by preventing absorption of light by an antenna, capable of extracting light in a wide angle from the illumination device, and which do not block transmission of a radio wave by the wireless communication device.SOLUTION: A plurality of LED light sources 7 is regularly arranged in front of a light reflection plate 5. A wireless communication device antenna 11 is arranged at a back of the light reflection plate where the LED light source 7 is not arranged. An electromagnetic wave absorption member 13 is arranged at a back of a circuit board 9 and the wireless communication device antenna 11. In the illumination device 1, the LED light source 7 and the wireless communication device antenna 11 are arranged deviated in a longitudinal direction of the light reflection plate 5 so that a light emission surface of the LED light source group does not shield a radiation surface of the wireless communication device antenna 11.SELECTED DRAWING: Figure 2

Description

【Technical Field】 【0001】 The present invention relates to a lighting device with excellent design incorporating a wireless communication device in which an LED lighting device and a wireless communication device are integrated, a method for adjusting the angle of an antenna of the wireless communication device, a method for installing the lighting device, and a light reflecting plate with low loss when passing through radio waves of a predetermined wavelength radiated at a wide angle. 【Background Art】 【0002】 As the expansion of 5G services and the sophistication of information and communication needs progress, due to needs such as the intelligentization of automobiles, for example, the need for installing wireless communication devices on highways is increasing. Although various installation locations can be considered for installing a wireless communication device on a highway, road external lights such as those on highways are considered as locations with few obstacles to moving automobiles and other communication environments. 【0003】 For example, external lights on highways are usually arranged at regular intervals, and moreover, it is an environment where automobiles are looked down upon from above and there are few obstacles. Therefore, if it is possible to prevent adverse effects due to leakage of reflected waves and transmitted waves of electromagnetic waves to the external environment, it is considered an optimal installation environment as a location for installing an antenna for a wireless communication device for automobiles. In this case, if a wireless communication device is incorporated into a road external light and the performance as a wireless communication device can be maintained without degrading the performance as a lighting device, the communication device can be optimally arranged. However, when a wireless communication device is incorporated into the lighting device, there is a problem that the performance of the wireless communication device is degraded due to radio wave absorption by the components of the lighting device. 【0004】 As such a lighting device, for example, a road lighting system capable of changing the lighting state according to physical abilities including the driver's vision has been proposed (Patent Document 1). The road lighting system of Patent Document 1 includes a plurality of lighting devices installed along a road, a control device for controlling the lighting state of the lighting devices, and a road-side communication device that exchanges information with the control device and performs wireless communication with a vehicle-side communication device mounted on a vehicle traveling on the road. 【0005】 Furthermore, a lighting control system and lighting control method have been proposed that reduce power consumption in streetlights and achieve energy-saving effects by turning on streetlights only when the lighting conditions are met, while maintaining the crime prevention effect at night (Patent Document 2). 【0006】 In the lighting control system for automatically turning on a light fixture described in Patent Document 2, when a person carrying a portable device capable of emitting radio waves passes near a light fixture, the system receives radio waves emitted from the portable device. Based on these received radio waves, the system calculates the distance from the portable device, and turns on the light fixture if the calculated distance is less than or equal to a set value. 【0007】 Furthermore, even when installed or attached as road-related equipment, methods for suppressing unwanted radio waves generated by surrounding road-related equipment that performs communication or sensing using radio waves, and road-related equipment capable of suppressing the generation of unwanted radio waves have been proposed (Patent Document 3). 【0008】 Patent Document 3 describes a configuration in which, in order to suppress unwanted radio waves generated by surrounding road facilities during radio wave communication or sensing, transparent radio wave absorbers are placed on both sides of a radio wave reflector. On each side of the radio wave reflector, a resistive film with appropriate surface resistance and a dielectric are placed to absorb radio waves arriving from both sides. Furthermore, by making the resistive film and dielectric from transparent materials, the radio wave absorber is formed in a structure that allows light to pass through. 【0009】 According to Patent Document 3, by attaching a transparent radio wave absorber to road-related equipment, or by forming the main parts of such road-related equipment from a transparent radio wave absorber, unwanted radio wave reflection and transmission can be prevented, thereby enabling the equipment to perform its intended function. Furthermore, because the radio wave absorber is transparent, it can effectively suppress unwanted radio waves during radio wave-based communication or sensing without obstructing the field of view or light rays. 【0010】 Furthermore, a position measurement system that can be easily put into practical use using a visible light communication system has been proposed (Patent Document 4). Patent Document 4 describes a position measurement system that measures the current position of a vehicle using a visible light communication beacon that transmits position information as a visible light signal and image information captured by a single camera. The visible light communication beacon consists of a street light installed on a street lighting pole and a visible light communication device. The vehicle has a vehicle position measurement device equipped with a single camera that demodulates the position information of the visible light communication beacon from the visible light signal and calculates the current position. 【0011】 According to Patent Document 4, the position of a moving object can be measured by using the image information and position information captured by the monocular imaging means, which is provided on the moving object to be measured, and which transmits a visible light signal modulated with position information including height information at a fixed position. 【0012】 Furthermore, a base station device has been proposed that is compact, can be manufactured at low cost, can avoid radio interference, and can operate even during disasters (Patent Document 5). 【0013】 The base station device described in Patent Document 5 integrates a base station unit, an emergency light unit, and a common power supply unit into a single housing. This base station device includes a base station unit that wirelessly connects to a mobile terminal and relays communication between the mobile terminal and the other device, an emergency light unit which is an electrical equipment unit that receives power and performs predetermined operations, a common power supply unit that supplies power to the base station unit and the emergency light unit, and a housing that is permanently deployed indoors or outdoors. Furthermore, in Patent Document 5, a resin light guide plate with a light source placed at the end or LED elements arranged in a planar manner is used, and in the housing, an emergency light panel section and a resin display panel section are arranged in front of the base station unit, which is a wireless communication device, and the electrical equipment unit, as an illumination device. [Prior art documents] [Patent Documents] 【0014】 [Patent Document 1] Japanese Patent Publication No. 2001-307895 [Patent Document 2] Japanese Patent Publication No. 2002-334793 [Patent Document 3] Japanese Patent Publication No. 2003-218581 [Patent Document 4] Japanese Patent Publication No. 2009-36571 [Patent Document 5] Japanese Patent Publication No. 2015-226201 [Overview of the project] [Problems that the invention aims to solve] 【0015】 However, with conventional structures, the light extraction efficiency from lighting devices incorporating wireless communication equipment is not always sufficient, and it is not possible to achieve a uniform light brightness distribution overall. Furthermore, integrating the lighting device and the wireless communication equipment may cause the lighting device to interfere with the transmission of radio waves from the wireless communication equipment. 【0016】 For example, reflectors are typically used to ensure uniformity of light emitted from a lighting device. However, metal reflectors, for instance, have a high dielectric constant, which can lead to significant transmission loss of radio waves. Furthermore, improper placement of reflectors can cause uneven brightness due to direct light from the light source. 【0017】 In contrast, by placing the lighting device and the wireless communication device in different locations, it is possible to create a layout in which the radio waves from the wireless communication device are not affected by the lighting device. However, this requires the lighting device and the wireless communication device to be placed separately, making miniaturization difficult. 【0018】 The present invention has been made in view of these problems, and aims to provide a lighting device with excellent design that incorporates a wireless communication device, which, while being a direct lighting device, guides reflected light to the part of a light reflector with high diffuse reflectivity where the LED light source is not placed, thereby mitigating differences in the brightness distribution of the light extracted from the lighting device and making it more uniform, while at the same time not interfering with the transmission of radio waves from the wireless communication device, a method for adjusting the angle of the antenna of the wireless communication device, a method for laying it, and a light reflector that has low loss when radio waves of a predetermined wavelength radiated over a wide angle pass through. [Means for solving the problem] 【0019】 To achieve the aforementioned objectives, the first invention provides a lighting device comprising: a front cover member formed of at least a light-transmitting member; a circuit board; a light reflector positioned in front of the circuit board; a group of LED light sources arranged on the circuit board such that the light-emitting surfaces of a plurality of LED light sources are regularly arranged in front of the light reflector; an antenna of a wireless communication device positioned behind the light reflector; an electromagnetic wave absorbing member positioned behind the antenna of the wireless communication device; and a rear cover member, wherein the shape of the light reflector in a side view from a direction perpendicular to the surface of the light reflector has a shape in which at least a part of either both ends or the central part in the longitudinal direction of the light reflector protrudes forward. The light reflector is formed in a substantially straight line, and in the longitudinal direction of the light reflector, the LED light source group and the antenna of the wireless communication device are arranged such that one of them is located at both ends of the light reflector and the other at the center of the light reflector, so that the light-emitting surface of the LED light source group does not obstruct the radiating surface of the antenna of the wireless communication device, and the front cover member and the portion of the light reflector that covers the light-emitting surface of the LED light source and the antenna of the wireless communication device are spaced at a predetermined distance apart, and the antenna of the wireless communication device is located behind the forward-projecting portion or substantially straight portion of the light reflector. 【0020】 The light reflector is a micro-foamed resin sheet made of either PET resin or PC resin. When the diffusion reflectance of the micro-foamed resin sheet with respect to a barium sulfate standard plate in the visible light band with a wavelength of 450 to 650 nm is 100%, it is preferably a micro-foamed resin sheet with a diffusion reflectance of 95% or more and a relative permittivity of 1.8 or less, and more preferably a relative permittivity of 1.5 or less. 【0021】 It is desirable that the LED light source group is arranged in a grid pattern, a staggered pattern, or an array pattern on the flat light reflector, or is arranged in a predetermined regular arrangement pattern other than the grid pattern, the staggered pattern, or the array pattern. 【0022】 The light reflector is composed of a micro-foamed resin sheet molded body in which a large number of cup-shaped depressions are formed in a predetermined arrangement pattern, and a large number of the individual LED light sources may be arranged at the bottom of each of the depressions so as to be surrounded by the depressions. 【0023】 With respect to the longitudinal direction of the light reflector, the antenna of the wireless communication device is arranged at the central portion of the light reflector, the LED light source group is arranged on both sides of the antenna of the wireless communication device so as to sandwich the antenna of the wireless communication device, and at least the central portion of the light reflector corresponding to the front of the antenna of the wireless communication device is formed to protrude forward in a predetermined shape in order to secure a movable area for imparting an inclination angle to the antenna of the wireless communication device, and the shape of the protruding shape portion in at least either the longitudinal direction or the short transverse direction of the light reflector may be formed into any convex shape including a substantially trapezoidal shape, a triangular shape, or a convex curved shape with a large radius of curvature. 【0024】 Thus, the shape of the central portion of the light reflector covering the antenna of the wireless communication device may be a substantially trapezoidal shape, a triangular shape, or a convex curve shape including an arc shape with a large radius of curvature that protrudes forward with respect to at least either the longitudinal direction or the lateral direction of the light reflector. In this case, the light reflector may be arranged facing the same direction so that the optical axis directions of the light emitting surfaces of the LED light source groups arranged so as to sandwich the antenna of the wireless communication device are parallel, or the light emitting surfaces of the LED light source groups may be arranged obliquely to each other so that the optical axis directions approach each other slightly. 【0025】 With respect to the longitudinal direction of the light reflector, the LED light source group is arranged at the central portion of the light reflector, the antenna of the wireless communication device is arranged on both sides of the LED light source group so as to sandwich the LED light source group, and both end portions in the longitudinal direction of the light reflector are formed to protrude forward in a predetermined shape from the central portion of the light reflector toward both end portions in the longitudinal direction covering the antenna of the wireless communication device in order to secure a movable region for imparting an inclination angle to the antenna of the wireless communication device. The antenna of the wireless communication device may be arranged behind the shape portion protruding forward of the light reflector. As long as it protrudes forward in a predetermined shape on both end portions in the longitudinal direction of the light reflector, the shape may be a flat plate shape. 【0026】 With respect to the longitudinal direction of the light reflector, the antenna of the wireless communication device is arranged at the central portion of the light reflector, the LED light source group is arranged on both sides of the antenna of the wireless communication device so as to sandwich the antenna of the wireless communication device, and the antenna of the wireless communication device may be arranged inclined with respect to the LED light source group so that the center line of the main beam of the radio wave emitted from the antenna of the wireless communication device is deviated by a predetermined angle with respect to the center line of the irradiation direction of the LED light source group. 【0027】 The LED light source group may be positioned in the center of the light reflector with respect to its longitudinal direction, the antenna of the wireless communication device may be positioned on both sides of the LED light source group so as to sandwich it, and the antenna of the wireless communication device may be positioned at an angle relative to the LED light source group such that the center line of the main beam of the radio waves emitted from the antenna of the wireless communication device is shifted by a predetermined angle with respect to the center line of the irradiation direction of the LED light source group. 【0028】 The front cover member is formed from a light-transmitting resin or glass, and if formed from a light-transmitting resin, it may be PC resin, ABS resin, PET resin, PVC resin, It is PMMA resin. The transparent resin is either acrylic resin or polystyrene resin, or a translucent resin obtained by adding a pigment to a transparent resin, or a resin having a translucent structure on its surface. If formed from glass, it may be transparent silica glass or translucent glass. 【0029】 The front cover member may have a geometric uneven structure on either its inner or outer surface, which is made of light-transmitting resin or glass. Mutual diffuse reflection may be repeated between the geometric uneven structure and the light reflector to make the extracted light indirect, or the direction of light extraction may be made random to create indirect light. 【0030】 The material forming the rear cover member is made of resin or metal, and further, the electromagnetic wave absorbing member, which is made of an electromagnetic wave absorber, is arranged inside the rear cover member. The electromagnetic wave absorbing member may be a resistive material radio wave absorber, a dielectric material radio wave absorber, a magnetic material radio wave absorber, a combination of these radio wave absorbers, or a multiple layer of these radio wave absorbers. 【0031】 The relationship between PET resin and PC resin in terms of radio wave attenuation due to radio wave absorption by air in the 70-100 GHz wavelength band. Microfoamed resin sheet It is desirable that the increase in radio wave attenuation at an inclination angle of 0° relative to the optical reflector when passing through the optical reflector is within the range of 0.15 dB or less. 【0032】 In a lighting device incorporating a wireless communication device, using a light reflector made of micro-foamed resin for light reflection is expected to result in lighting with low radio wave attenuation when passing through the light reflector over a wide angle. The light reflector, made of a micro-foamed resin sheet, is either PET resin foam or PC resin foam, and when the inclination angle of the light reflector with respect to the antenna surface of the antenna positioned behind the light reflector is in the range of 0° to 45°, the increase in radio wave attenuation when passing through the light reflector compared to the radio wave attenuation when passing through the air layer in the wavelength band of 22 to 33 GHz satisfies 0.10 dB or less, or when the range is 0° to 60°, the similar increase in radio wave attenuation satisfies 0.15 dB or less, thus enabling a lighting device incorporating a wireless communication device. 【0033】 Therefore, there is almost no angle dependence on the increase in radio wave attenuation, and the optical reflector is positioned in front of an antenna that transmits radio waves at a wide angle. Even if the apparent thickness of the micro-foamed resin sheet of the optical reflector increases as the radio waves pass through the optical reflector at an angle, there is almost no increase in radio wave attenuation when passing through the resin sheet. 【0034】 The light reflector, made of a micro-foamed resin sheet, is either PET resin foam or PC resin foam, and when the inclination angle of the light reflector with respect to the antenna surface of the antenna positioned behind the light reflector is in the range of 0° to 45°, the increase in radio wave attenuation when passing through the light reflector compared to the radio wave attenuation when passing through the air layer in the 70 to 100 GHz wavelength band satisfies either of the above conditions, or when the range is 0° to 60°, the increase in radio wave attenuation is 0.50 dB or less, thus providing a lighting device incorporating a wireless communication device. 【0035】 Therefore, there is almost no angle dependence on the increase in radio wave attenuation, and the optical reflector is positioned in front of an antenna that transmits radio waves at a wide angle. Even if the apparent thickness of the micro-foamed resin sheet of the optical reflector increases as the radio waves pass through the optical reflector at an angle, there is almost no increase in radio wave attenuation when passing through the resin sheet. 【0036】 In this invention, the radio wave attenuation when passing through the optical reflector represents the loss when passing through the optical reflector from the input terminal side to the output terminal side. Therefore, it is considered to include not only the absorption loss when passing through the optical reflector but also the loss due to scattering and reflection. Thus, the radio wave attenuation when passing through the optical reflector will be defined below as including reflection loss in addition to absorption loss. 【0037】 According to the first invention, in order that the antenna of the wireless communication device does not overlap with the group of LED light sources, either the group of LED light sources or the antenna of the wireless communication device is positioned at both ends of the light reflector, and the other is positioned at the center of the light reflector, along the longitudinal direction of the light reflector. Therefore, the light-emitting surface of the group of LED light sources does not obstruct the radiating surface of the antenna of the wireless communication device. As a result, the absorption of electromagnetic waves emitted from the antenna of the wireless communication device can be suppressed. 【0038】 Furthermore, if the cover member of a lighting device with a built-in wireless communication device is formed by a front cover member and a rear cover member, and the rear cover member covers an electromagnetic wave absorbing member, the impact on the external environment from radio waves emitted from the wireless communication device and radio waves that pass through it can be reduced. For example, if the lighting device is a street light, the impact on other vehicles other than those intended to travel on the road and the surrounding external environment from radio waves emitted from the wireless communication device can be reduced. 【0039】 Furthermore, if the diffuse reflectance of the micro-foamed resin sheet is sufficiently high, the brightness distribution can be made uniform through reflection. Also, if the relative permittivity of the micro-foamed resin sheet is 1.8 or less, the transmission loss of radio waves when they pass through the micro-foamed resin sheet can be suppressed more reliably. For example, while the relative permittivity of ordinary transparent resin is greater than 2.0, the relative permittivity of the micro-foamed resin sheet is low, resulting in less loss due to reflection, absorption, and scattering when radio waves are transmitted. 【0040】 Furthermore, by arranging the LED light source group in a regular, predetermined pattern, the light extracted from the LED light source group can be made more uniform. 【0041】 Furthermore, by using a molded body in which numerous cup-shaped depressions are formed in a micro-foamed resin sheet, the amount of diffuse reflection from the inner surface of the depressions can be increased even when the LED light source is positioned toward the front cover member, which is the light extraction section. This reduces the difference in the brightness distribution of the light extracted from the LED light source group, making it more uniform. In addition, it has the effect of spreading the luminous beam of the reflected light, which can widen the illumination range of the lighting device. 【0042】 Furthermore, when the antenna of a wireless communication device is positioned in the center of the light reflector in the longitudinal direction of the light reflector, the central portion of the light reflector corresponding to the antenna of the wireless communication device is formed to protrude forward in a predetermined shape, thereby securing an operating space or installation space for tilting the antenna at a predetermined angle. In addition, since a light guide space can be formed between the front cover member and the light reflector, diffused light can be guided to the surface of the light reflector located in front of the antenna of the wireless communication device. As a result, a predetermined brightness can be given to the light reflector covering the antenna of the wireless communication device, and brightness uniformity can be achieved. 【0043】 Furthermore, when the antennas of a wireless communication device are positioned at both ends of the light reflector in the longitudinal direction of the light reflector, by forming the reflector so as to extend forward in a predetermined shape from the center of the light reflector toward both ends in the longitudinal direction that cover the antennas of the wireless communication device, it is possible to secure an operating space or installation space that allows the antennas to be tilted at a predetermined angle. 【0044】 Furthermore, since the light from the LED light source can be diffusely reflected off the surface of the light reflector located in front of the antenna of the wireless communication device, a predetermined brightness can be provided to the light reflector covering the antenna of the wireless communication device. In this way, even if the front of the antenna of the wireless communication device is covered with a light reflector, the aesthetic design of the front of the antenna can be maintained. As mentioned above, even if the front of the antenna is covered with a light reflector made of micro-foamed resin sheet, the low dielectric constant of the light reflector does not interfere with the radio waves emitted from the antenna. 【0045】 Furthermore, by arranging the LED light sources at both ends of the light reflector in the longitudinal direction of the light reflector, and tilting the irradiation direction toward the center, the light emitted from each LED light source group positioned at both ends of the light reflector can be superimposed. This prevents the diffusion of the light emitted from the LED light sources and increases the brightness in the irradiation range of a predetermined area. In addition, the radiation position of the main lobe can also be adjusted by adjusting the arrangement angle of the antenna and thereby adjusting the radiation angle of the main lobe emitted from the antenna. 【0046】 Furthermore, by positioning the antennas of the wireless communication devices at both ends of the light reflector in the longitudinal direction of the light reflector, and tilting their radiation direction toward the center, the radio waves emitted from the antennas of the wireless communication devices positioned at both ends of the light reflector can be superimposed. This increases the signal strength from the antennas of the wireless communication devices. The angle of the antennas can be adjusted, for example, by changing the contact position between the bracket and the spherical part of the support structure, which consists of a bracket, a spherical part, and an antenna support part, using wing nuts and nuts. 【0047】 Furthermore, as the front cover component, not only transparent light-transmitting material but also translucent light-transmitting material or a translucent laminate in which a translucent resin film is attached to the surface of transparent resin or transparent glass can be used. This makes it possible to express colors in a more complex and sophisticated way. 【0048】 Furthermore, by forming a geometric uneven structure on the inside of the front cover member, multiple reflections can be repeatedly performed between the inner surface of the front cover member and the light reflector, which has the effect of creating indirect light. 【0049】 Furthermore, by placing an electromagnetic wave absorbing material—either a resistive material, a dielectric material, or a magnetic material—inside the rear cover member, the impact of radio waves emitted from the wireless communication device and radio waves that pass through it on the external environment can be reduced. 【0050】 Furthermore, if the increase in radio wave attenuation due to air absorption in the 70-100 GHz wavelength band is within the range of 0 to 0.15 dB, then the absorption of radio waves as they pass through the reflector is small, and even if the lighting device is integrated with a wireless communication device, the communication performance will not be impaired. 【0051】 The second invention is a method for adjusting the angle of the antenna of a wireless communication device of a lighting device incorporating a wireless communication device according to the first invention, wherein the group of LED light sources is arranged on both ends of the antenna of the wireless communication device, the centerlines of the light rays emitted from the group of LED light sources are arranged to intersect at a predetermined height at a predetermined position in the space below the lighting device, and the method has an angle adjustment mechanism for adjusting the angle of the antenna placement surface of the wireless communication device so that the centerline of the main beam of the antenna of the wireless communication device can pass through the position where the centerlines of the LED light sources intersect, or at a position offset by a predetermined distance, and the angle of the antenna placement angle of the wireless communication device is adjusted by adjusting the angle adjustment mechanism to a predetermined angle. This angle adjustment can be achieved, for example, by a structure using a bracket and a spherical part. 【0052】 Furthermore, the second invention is a method for adjusting the angle of the antenna of a wireless communication device in a lighting device incorporating a wireless communication device according to the first invention, wherein the antenna of the wireless communication device is arranged on both ends of the LED light source group, and the center line of the main beam of the irradiation space of the radio waves emitted from the antenna of the wireless communication device intersects at a predetermined position at a predetermined height in the space below the lighting device, and the method has an angle adjustment mechanism for adjusting the angle of the arrangement surface of the antenna of the wireless communication device so that the center line of the LED light source group can pass through the position where the main beam of the antenna of the wireless communication device intersects, or pass through a position offset by a predetermined distance, and the arrangement angle of the antenna of the wireless communication device is adjusted by adjusting the angle adjustment mechanism. 【0053】 According to the second invention, the radiation direction of the main lobe of the radio waves emitted from the antenna of the wireless communication device can be adjusted. 【0054】 The third invention is a method for installing a lighting device incorporating a wireless communication device according to the first invention, characterized in that, when the antenna of the wireless communication device is positioned behind the central part of the light reflector with respect to the longitudinal direction of the light reflector, and the group of LED light sources is positioned on the light reflectors on both sides of the antenna of the wireless communication device so as to sandwich the antenna of the wireless communication device, the angle can be adjusted so that the radiating surface of the antenna of the wireless communication device coincides with the direction of the arrangement surface of the group of LED light sources, or is positioned at a predetermined angle. 【0055】 Furthermore, the third invention is a method for installing a lighting device incorporating a wireless communication device according to the first invention, wherein, when the group of LED light sources is arranged on the central part of the light reflector with respect to the longitudinal direction of the light reflector, and the antenna of the wireless communication device is arranged behind the light reflectors on both sides of the group of LED light sources so as to sandwich the group of LED light sources, the radiating surface of the antenna of the wireless communication device can be adjusted so as to coincide with the direction of the arrangement surface of the group of LED light sources, or to be tilted at a predetermined angle. 【0056】 According to the third invention, the arrangement angle of the radiating surface of the antenna of the wireless communication device can be adjusted. In this way, the center line of the light emitted from the LED light source group of the lighting device and the radiation direction of the main lobe of the radio waves emitted from the antenna of the wireless communication device can be adjusted. Thus, a method for installing a lighting device can be provided that involves adjusting the arrangement angle between the radiating surface of the antenna and the arrangement plane direction of the LED light source group. 【0057】 The fourth invention is a micro-foamed resin sheet made of PET resin or PC resin used as a light reflector, characterized in that the increase in radio wave attenuation when passing through the light reflector relative to the radio wave attenuation when passing through the air layer is within the range of 0.10 dB or less, within a wide range of tilt angles of 0 to 45° for the tilt angle of the light reflector in the wavelength band of 22 to 33 GHz. 【0058】 Furthermore, the fifth invention is an optical reflector made of a micro-foamed resin sheet made of PET resin or PC resin, characterized in that the increase in radio wave attenuation when passing through the optical reflector relative to the radio wave attenuation when passing through the air layer is within the range of 0.15 dB or less, within a wide range of tilt angles of 0 to 60° for the optical reflector in the wavelength band of 22 to 33 GHz. 【0059】 Furthermore, the sixth invention is an optical reflector made of a micro-foamed resin sheet made of PET resin or PC resin, characterized in that the increase in radio wave attenuation when passing through the optical reflector relative to the radio wave attenuation when passing through the air layer is within the range of 0.20 dB or less, within a wide range of tilt angles of 0 to 45° for the optical reflector in the wavelength band of 70 to 100 GHz. 【0060】 Furthermore, the seventh invention is an optical reflector made of a micro-foamed resin sheet made of PET resin or PC resin, characterized in that the tilt angle of the optical reflector in the wavelength band of 70 to 100 GHz is within a wide tilt range of 0 to 60°, and the increase in radio wave attenuation when passing through the optical reflector relative to the radio wave attenuation when passing through the air layer is within the range of 0.50 dB or less. 【0061】 According to the fourth invention, by using a micro-foamed resin sheet foam made of PET resin or PC resin for the light reflector, it is possible to obtain a light reflector made of a micro-foamed sheet characterized in that, within a wide range of tilt angles of 0 to 45° for the light reflector in the wavelength band of 22 to 33 GHz, the increase in radio wave attenuation when passing through the light reflector relative to the radio wave attenuation when passing through the air layer is within the range of 0.10 dB or less. 【0062】 For example, when the tilt angle in the aforementioned wavelength band is 45°, the increase in radio wave attenuation for microfoamed PET resin is 0.06 dB, and when the tilt angle is 45°, the increase in radio wave attenuation for microfoamed PC resin is 0.07 dB. Therefore, regardless of which material is used, the increase in radio wave attenuation satisfies the requirement of 0.10 dB or less. 【0063】 Furthermore, according to the fifth invention, by using a micro-foamed resin sheet foam made of PET resin or PC resin for the light reflector, it is possible to obtain a light reflector made of a micro-foamed sheet characterized in that, within a wide range of tilt angles of 0 to 60° for the light reflector in the wavelength band of 22 to 33 GHz, the increase in radio wave attenuation when passing through the light reflector relative to the radio wave attenuation when passing through the air layer is within the range of 0.15 dB or less. 【0064】 For example, when the tilt angle in the aforementioned wavelength band is 60°, the increase in radio wave attenuation for microfoamed PET resin is 0.11 dB, and when the tilt angle is 60°, the increase in radio wave attenuation for microfoamed PC resin is 0.14 dB. Therefore, regardless of which material is used, the increase in radio wave attenuation will satisfy the requirement of 0.15 dB or less. 【0065】 Furthermore, according to the sixth invention, if a micro-foamed resin sheet foam made of PET resin or PC resin is used for the light reflector, a light reflector made of a micro-foamed sheet can be obtained, characterized in that the increase in radio wave attenuation when passing through the light reflector relative to the radio wave attenuation when passing through the air layer is within the range of 0.20 dB or less, within a wide range of tilt angles of 0 to 45° for the light reflector in the wavelength band of 70 to 100 GHz. 【0066】 For example, when the tilt angle in the aforementioned wavelength band is 45°, the increase in radio wave attenuation for microfoamed PET resin is 0.15 dB, and when the tilt angle is 45°, the increase in radio wave attenuation for microfoamed PC resin is 0.18 dB. Therefore, regardless of which material is used, the increase in radio wave attenuation will satisfy the requirement of 0.20 dB or less. 【0067】 Furthermore, according to the seventh invention, by using a micro-foamed resin sheet foam made of PET resin or PC resin for the light reflector, it is possible to obtain a light reflector made of a micro-foamed sheet characterized in that, within a wide range of tilt angles of 0 to 60° for the light reflector in the wavelength band of 70 to 100 GHz, the increase in radio wave attenuation when passing through the light reflector relative to the radio wave attenuation when passing through the air layer falls within the range of 0.50 dB or less. 【0068】 For example, when the above-mentioned tilt angle in the wavelength band is 60°, the increase in radio wave attenuation of microfoamed PET resin is 0.41 dB, and when the above-mentioned tilt angle is 60°, the increase in radio wave attenuation of microfoamed PC resin is 0.48 dB. Therefore, regardless of which material is used, the increase in radio wave attenuation satisfies the requirement of 0.50 dB or less. 【0069】 Using such a light reflector, although an increase in radio wave attenuation is observed at a tilt angle of 60° compared to 45°, overall, the angle dependence of the increase in radio wave attenuation when radio waves radiated at a wide angle pass through the light reflector is not very large, making it possible to obtain a lighting device that can be used in front of the antenna of a lighting device that incorporates a wireless communication device with low radio wave attenuation. [Effects of the Invention] 【0070】 According to the present invention, it is possible to provide a lighting device with excellent design that incorporates a wireless communication device, which has superior light extraction efficiency from an LED lighting device, reduces differences in the brightness distribution of the light extracted from the lighting device to make it more uniform, and further improves the brightness level of the lighting device and expands the illumination range of the lighting device by covering the antenna with a light reflector with high diffuse reflectivity to prevent light absorption by the antenna, while at the same time not interfering with the transmission of radio waves from the wireless communication device. 【0071】 Furthermore, the wireless communication device has an antenna angle adjustment mechanism, making it possible to adjust the antenna's placement angle. This allows for the provision of a method for adjusting the antenna's placement angle and a method for installing a lighting device that adjusts the radiation direction of the main lobe of radio waves emitted from the wireless communication device's antenna. 【0072】 The present invention provides a lighting device incorporating a wireless communication device. By integrating the wireless communication device and placing a micro-foamed resin sheet behind the LED light source as a light reflector for the LED light source group, and guiding the reflected light onto a light reflector where no LED light source is placed, differences in brightness distribution are mitigated, resulting in an indirect lighting effect that reduces glare despite being direct illumination, and enabling the illumination range of the lighting device to be extended. Furthermore, even though the front of the radio wave emitting surface of the wireless communication device's antenna is covered by the light reflector, the transmission loss of radio waves when passing through the light reflector is extremely low, thus improving the design of the lighting device without impairing the performance of the wireless communication device. As a result, the light reflector covering the antenna can be a light-emitting material with a predetermined brightness, enabling the realization of a lighting device with excellent design that incorporates a wireless communication device with almost no transmission loss of radio waves, and simultaneously obtaining a light reflector with low loss of radio wave transmission when radio waves of a predetermined wavelength radiated over a wide angle are transmitted. [Brief explanation of the drawing] 【0073】 [Figure 1] A plan view showing lighting device 1. [Figure 2] (a) is a cross-sectional view along line AA in Figure 1, and (b) is a cross-sectional view along line BB in Figure 1. [Figure 3] A diagram showing another layout of the LED light source 7 in the lighting device 1. [Figure 4] This figure illustrates a method for measuring the angular dependence of radio wave attenuation when passing through a light reflector made of a micro-foamed PET resin sheet or a micro-foamed PC resin sheet, using a horn antenna. [Figure 5] The figures show the measurement results of the angle dependence of radio wave attenuation when passing through a micro-foamed PET resin sheet in a predetermined frequency band. (a) shows the radio wave attenuation when passing through at angles from 0° to 45° in the 22-33 GHz band, (b) shows the radio wave attenuation when passing through at 60° in the 22-33 GHz band, (c) shows the radio wave attenuation when passing through at angles from 0° to 45° in the 70-100 GHz band, and (d) shows the radio wave attenuation when passing through at 60° in the 70-100 GHz band. [Figure 6] The figures show the measurement results of the angle dependence of radio wave attenuation when passing through a micro-foamed PC resin sheet in a predetermined frequency band. (a) shows the radio wave attenuation when passing through at angles from 0° to 45° in the 22-33 GHz band, (b) shows the radio wave attenuation when passing through at 60° in the 22-33 GHz band, (c) shows the radio wave attenuation when passing through at angles from 0° to 45° in the 70-100 GHz band, and (d) shows the radio wave attenuation when passing through at 60° in the 70-100 GHz band. [Figure 7] (a) is a plan view of the antenna fixing part 17, and (b) is a side view of the antenna fixing part 17. [Figure 8] (a) is a plan view of the antenna fixing part 17a, and (b) is a side view of the antenna fixing part 17. [Figure 9] (a) is a plan view of the antenna fixing part 17b, and (b) is a side view of the antenna fixing part 17. [Figure 10] (a) and (b) are diagrams showing the usage status of the lighting device 1. [Figure 11] A plan view showing lighting device 1a. [Figure 12] (a) is a cross-sectional view along line DD in Figure 11, and (b) is a cross-sectional view along line EE in Figure 11. [Figure 13] A plan view showing lighting device 1b. [Figure 14] (a) is a cross-sectional view along the GG line in Figure 13, and (b) is a cross-sectional view along the HH line in Figure 13. [Figure 15] A plan view showing lighting device 1c. [Figure 16] (a) is a cross-sectional view of line JJ in Figure 15, and (b) is a cross-sectional view of line KK in Figure 15. [Figure 17] A plan view showing lighting device 1d. [Figure 18] (a) is a cross-sectional view of the MM line in Figure 17, and (b) is a cross-sectional view of the NN line in Figure 17. [Modes for carrying out the invention] 【0074】 (First embodiment) Embodiments of the present invention will be described below with reference to the drawings. Figure 1 shows a lighting device 1 with a built-in wireless communication device, and is a cross-sectional view of line CC in Figure 2(a), Figure 2(a) is a cross-sectional view of line AA in Figure 1, and Figure 2(b) is a cross-sectional view of line BB in Figure 1. Wiring and the like will not be shown in the following description. 【0075】 In the following explanation, the upward direction in Figure 2(a) (left side in Figure 2(b)) is the direction of emission of light and radio waves, and this direction is considered the front of the lighting device 1. The downward direction in Figure 2(a) (right side in Figure 2(b)) is considered the rear (back side) of the lighting device 1. Also, the left-right direction in Figure 2(a) is considered the short side of the lighting device 1, and the up-down direction in Figure 2(b) is considered the long side of the lighting device 1. 【0076】 As shown in Figures 2(a) and 2(b), the lighting device 1 mainly consists of a front cover member 3, a light reflector 5, an LED light source 7, a circuit board 9, a wireless communication device antenna 11, an electromagnetic wave absorbing member 13, a rear cover member 15, and the like. 【0077】 (Arrangement of LED light sources) As shown in Figure 1, the LED light sources 7 are arranged in a regular pattern in front of the light reflector 5 at the front of the circuit board 9. In addition, the light reflector 5 is positioned in front of the circuit board 9 in areas other than those occupied by the LED light sources 7. That is, multiple LED light sources 7 are arranged on the circuit board 9 so as to surround the approximate center of the light reflector 5, except for the approximate center of the light reflector 5, so that the light-emitting surfaces of the LED light sources 7 are regularly positioned in front of the light reflector 5. The multiple arranged LED light sources 7 are collectively referred to as an LED light source group. The shape of the light reflector 5, when viewed from a side view from a direction perpendicular to the surface of the light reflector 5 (Figures 2(a) and 2(b)), is formed to be approximately in a straight line with respect to the longitudinal direction of the light reflector 5 (the vertical direction in Figure 2(b)). 【0078】 In the example shown in Figure 1, the LED light sources are arranged in a grid pattern so that the LED light sources 7 are positioned in front of the flat light reflector 5, but this is not the only option. For example, Figure 3 shows another example of the arrangement of the LED light sources 7. As shown in Figure 3, the LED light sources may be arranged in a staggered pattern in front of the flat light reflector 5. Thus, the LED light sources can be arranged in a grid, staggered pattern, or array pattern so that the light-emitting surfaces of the LED light sources are positioned in front of the flat light reflector 5, or they can be arranged on the circuit board 9 in a predetermined regular arrangement pattern other than a grid, staggered pattern, or array pattern. 【0079】 Normally, in order to position the light-emitting surfaces of the LED light source group stacked on the circuit board 9 in front of the light reflector 5, this structure can be obtained by cutting out the positions corresponding to each LED light source 7 in the light reflector 5 and placing it over the circuit board 9. For example, to obtain a stacked structure of an LED light source group with LED light sources 7 positioned in predetermined locations on the circuit board 9, the LED light sources 7 can be placed in predetermined positions on the circuit board 9 and soldered in place using a reflow oven or the like. Then, by placing a light reflector 5, with predetermined positions cut out to correspond to the LED light sources 7, over the circuit board 9 with the LED light sources 7 fixed in predetermined positions on the circuit board 9, a stacked structure of the circuit board 9 and the light reflector 5 can be obtained, in which the light-emitting surfaces of the LED light sources 7 are positioned in front of the light reflector 5 and the light reflector 5 is stacked on the front of the circuit board 9. 【0080】 (Relative permittivity, radio wave transmission loss, etc., of light reflectors made of micro-foamed resin sheets) The light reflector 5 is made of a micro-foamed resin sheet, for example, made of either PET resin or PC resin. The micro-foamed resin sheet has a diffuse reflectance of 95% or higher, more preferably 96% or higher, and even more preferably 98% or higher, relative to a barium sulfate standard plate in the visible light band of 450-650 nm, with the barium sulfate standard plate's diffuse reflectance being set at 100%. Furthermore, the relative permittivity of the micro-foamed resin sheet is preferably 1.8 or lower, and more preferably 1.5 or lower. A higher diffuse reflectance allows for higher brightness to be obtained even after multiple reflections. 【0081】 Furthermore, the relative permittivity of the microfoamed resin sheet can be measured using the cavity resonator method, specifically the complex relative permittivity in the planar direction of the substrate. In this invention, the relative permittivity is measured using the cavity resonator method at a resonant frequency of 2 GHz, with a sample measuring 78 mm in length, 2.4 mm in width, and 1 mm in thickness. For this measurement, the cavity resonator used is a CP461 manufactured by Kanto Electronics Applied Development Co., Ltd., and the network analyzer is an E8361A manufactured by Agilent Technologies. 【0082】 While the relative permittivity of typical non-foaming PET and PC resins is 2.9 to 3.0, the relative permittivity of PET resin foam can be 1.8 or less, and even 1.5 or less. Thus, compared to the relative permittivity of typical transparent resins which exceeds 2.0, the relative permittivity of foam is low, which can reduce losses such as reflection, absorption, and scattering when radio waves are transmitted. For example, the measured relative permittivity of a micro-foamed PET resin sheet is 1.31 with a tanδ of 0.0020, while the relative permittivity of a micro-foamed PC resin sheet is 1.39 with a tanδ of 0.0022. Thus, in both the case of PET and PC resins, the relative permittivity is 1.50 or less, and the tanδ also satisfies 0.0022 or less, indicating that the heat loss of radio waves is also low. 【0083】 In addition to the above, the radio wave absorption loss was evaluated using the S-parameter method. Specifically, two horn antennas were placed facing each other at a predetermined distance of 400 mm, and a micro-foamed resin sheet with dimensions of 210 mm × 297 mm × thickness of 1 mm was placed at a predetermined position in the space between them. The received level between the antennas was evaluated as the transmission loss (loss during passage). The transmission loss between the two antennas when the micro-foamed resin sheet was not placed was set to 0 dB. The radio wave absorption loss was evaluated by obtaining the transmission loss in the frequency bands of 22-33 GHz and 70-100 GHz from S21 of the S-parameter using a network analyzer (KEYSIGHT, model number N5291A). In this invention, transmission loss refers to all losses when passing through a micro-foamed resin sheet, and means all losses that occur when passing through a substance that is subject to absorption, scattering, reflection, etc., and transmission loss and loss during passage are synonymous. 【0084】 (Simple transmission loss of radio waves in a light reflector made of micro-foamed resin sheet) Here, the increase in radio wave attenuation when passing through a light reflector made of a micro-foamed resin sheet of PET resin or PC resin, compared to the radio wave attenuation due to radio wave absorption by air in the 70-100 GHz wavelength band, can be kept within the range of 0.15 dB or less. Here, the radio wave attenuation using the resin foam sheet refers to the radio wave attenuation at a normal tilt angle of 0°. By suppressing the radio wave attenuation to a maximum of 0.15 dB or less compared to the case of air in this way, the loss of radio waves transmitted through the radio wave radiated from the wireless communication device antenna 11 located on the back of the light reflector can be reduced. 【0085】 (Angle dependence of radio wave transmission loss in a light reflector made of microfoamed resin sheet) Typically, when a resin material is placed in front of the antenna, which is the transmitting device, and radio waves pass through the sheet-like resin material, the intensity of the radio waves after passing through the light reflector decreases due to the absorption and scattering of radio waves by the resin material, as described above. Light reflectors placed inside lighting devices may be formed in a flat shape, but for reasons such as optical design considerations or securing the range of motion of the antenna when the antenna is placed behind the light reflector, the light reflector in front of the antenna may be formed in a protruding shape or the reflector may be tilted at an angle. In addition, radio waves emitted from a wide-angle antenna may be emitted so as to cross the light reflector at an angle. 【0086】 In such cases, the transmission length (transmission distance) through the sheet-like resin material may increase compared to when the sheet-like resin material is placed parallel to the antenna surface. This can lead to problems such as changes in the transmission loss of radio waves emitted from the antenna and changes in the electric field strength distribution. On the other hand, since microfoamed resin has a low dielectric constant, it is conceivable that even if there is loss when light passes through the optical reflector made of microfoamed resin sheet, the effect may be small, although the dependence on the transmission angle is unknown. For this reason, a test was conducted to confirm the amount of radio wave attenuation when light passes through the optical reflector as a precaution. 【0087】 The transmission loss of radio waves was evaluated using the S-parameter method when micro-foamed PET resin sheets and micro-foamed PC resin sheets were tilted within a predetermined angular range of 0° to 60° with respect to the direction of radio wave radiation. The test method in this case was exactly the same as that for the transmission loss of radio waves in the sheet material described earlier. 【0088】 Figure 4 shows a method for measuring the angle dependence of radio wave attenuation when passing through a micro-foamed PET resin sheet and a micro-foamed PC resin sheet using a horn antenna 61. As shown in Figure 4, two horn antennas 61 were placed opposite each other at a predetermined distance of 400 mm, and a micro-foamed resin sheet with dimensions of 210 mm × 297 mm × thickness of 1 mm was placed in a predetermined position in the space between them, at predetermined angles perpendicular to the axis connecting the antennas and at predetermined angles θ = 0° to 60° (30°, 45°, 60°) from the perpendicular direction. The received level between the antennas was evaluated as the transmission loss (loss when passing through). The transmission loss between the two antennas when the micro-foamed resin sheet was not placed was set to 0 dB. Here, the transmission loss was evaluated in the frequency bands of 22 to 33 GHz and 70 to 100 GHz, and was obtained from the S21 of the S-parameters using a network analyzer 57 (KEYSIGHT, model number N5291A). 【0089】 Figure 5 shows the measurement results of the angle dependence of radio wave attenuation when passing through a micro-foamed PET resin sheet in a predetermined frequency band. Figures 5(a) and 5(b) show the angle dependence of radio wave attenuation when passing through a micro-foamed PET resin sheet in the 22-33 GHz band. Comparing the radio wave attenuation at 0° to 45° and the radio wave attenuation at 60° in the 22-33 GHz band, it can be seen that the difference with angle is not very large, but the radio wave attenuation becomes large at the high angle of 60°. 【0090】 Figures 5(c) and 5(d) show the angle dependence of radio wave attenuation when passing through a micro-foamed PET resin sheet in the 70-100 GHz band. From Figures 5(c) and 5(d), it can be seen that in the 0°-60° range of the 70-100 GHz band, radio wave attenuation increases with increasing angle, similar to the case of 22-33 GHz shown in Figures 5(a) and 5(b). Also, the loss is not very large in the 0-45° range, but at 60° the loss is larger than in the 0-45° range. Furthermore, comparing the 22-33 GHz band and the 70-100 GHz band, there is a tendency for the loss to be larger in the higher frequency 70-100 GHz band. 【0091】 Figure 6 shows the measurement results of the angle dependence of radio wave attenuation when passing through a micro-foamed PC resin sheet in a given frequency band. Figures 6(a) and 6(b) show the angle dependence of radio wave attenuation when passing through a micro-foamed PC resin sheet in the 22-33 GHz band. Looking at the measurement results in Figures 6(a) and 6(b), it can be seen that the difference in radio wave attenuation with respect to angle is not very large in the 22-33 GHz band from 0° to 45°, but the increase in radio wave attenuation becomes slightly larger at the higher angle of 60°. From Figures 6(c) and 6(d), it can be seen that in the 70-100 GHz band, the radio wave attenuation increases with increasing angle in the range of 0° to 60°. Furthermore, comparing the 22-33 GHz band and the 70-100 GHz band, there is a tendency for the loss to be larger in the higher frequency 70-100 GHz band. 【0092】 (Relationship between the maximum value of radio wave attenuation and wavelength at each tilt angle) Next, Table 1 shows the effect of the tilt angle on the amount of radio wave attenuation when passing through a light reflector made of a micro-foamed resin sheet made of PET resin or PC resin at a predetermined frequency. 【0093】 [Table 1] 【0094】 Table 1 shows the frequency at which radio wave attenuation is maximum for each resin sheet, and the corresponding radio wave attenuation. The following shows the relationship between the tilt angle of the optical reflector, the maximum radio wave attenuation, and the wavelength when passing through the optical reflector in each frequency band, referring to Table 1. 【0095】 Table 1 shows that in the 22-33 GHz wavelength band, the maximum radio wave attenuation is at the high-frequency end of the band at 33 GHz for all tilt angles from 0° to 60°. Table 1 also shows that in the 70-100 GHz wavelength band, within the tilt angle range of 0° to 60°, the maximum radio wave attenuation is at the lower frequency end when the tilt angle is small, while as the tilt angle increases, the wavelength showing maximum radio wave attenuation tends to shift to wavelengths near 100 GHz. At a tilt angle of 60°, the micro-foamed PET resin sheet shows a radio wave attenuation of 0.41 dB at 98 GHz, and the micro-foamed PC resin sheet shows a radio wave attenuation of 0.48 GHz at 94 GHz. 【0096】 (Radio wave attenuation when passing through an optical reflector at wavelengths of 22-33 GHz) When the light reflector, which is made of a micro-foamed resin sheet, is made of either PET resin foam or PC resin foam, and the inclination angle of the light reflector with respect to the antenna surface of the antenna positioned behind the light reflector is in a wide-angle range of 0° to 45°, the increase in radio wave attenuation when passing through the light reflector compared to the radio wave attenuation when passing through the air layer in the wavelength band of 22 to 33 GHz, when viewed as the maximum value in the respective frequency band for each graph, is 0.06 dB when the micro-foamed resin sheet is made of PET resin and 0.08 dB when it is made of PC resin, and when both are included, the requirement of 0.10 dB or less is satisfied. 【0097】 Similarly, if the angle of the light reflector is tilted in a wide range of angles from 0° to 60°, the increase in radio wave attenuation when passing through the light reflector compared to the radio wave attenuation when passing through the air layer in the wavelength band of 22 to 33 GHz, when viewed as the maximum value in the respective frequency band of each graph, is 0.11 dB for the micro-foamed resin sheet made of PET resin and 0.14 dB for the micro-foamed resin sheet made of PC resin. When both are included, the requirement of 0.15 dB or less is satisfied. 【0098】 (Radio wave attenuation when passing through an optical reflector at wavelengths of 70-100 GHz) The light reflector made of a micro-foamed resin sheet is either PET resin foam or PC resin foam, and when the inclination angle of the light reflector with respect to the antenna surface of the antenna positioned behind the light reflector is in a wide-angle range of 0° to 45°, the increase in radio wave attenuation when passing through the light reflector compared to the radio wave attenuation when passing through the air layer in the 70 to 100 GHz wavelength band, when viewed as the maximum value in the respective frequency band for each graph, is 0.15 dB for the micro-foamed resin sheet made of PET resin and 0.18 dB for the micro-foamed resin sheet made of PC resin, and when both are included, the requirement of 0.20 dB or less is satisfied. 【0099】 Similarly, when the angle of the light reflector is tilted in a wide range of angles from 0° to 60°, the increase in radio wave attenuation when passing through the light reflector compared to the radio wave attenuation when passing through the air layer in the wavelength band of 70 to 100 GHz, when viewed as the maximum value in the respective frequency band of each graph, is 0.41 dB when the microfoamed resin sheet is made of PET resin and 0.48 dB when it is made of PC resin. When both are included, the requirement of 0.50 dB or less is satisfied. 【0100】 As a result, even if the angle of the optical reflector made of micro-foamed resin sheet relative to the antenna surface of the antenna positioned behind the optical reflector is tilted in the range of 0° to 60°, the increase in radio wave attenuation when passing through the optical reflector relative to the radio wave attenuation due to passage through the air layer in the frequency band of 22 to 33 GHz and the wavelength band of 70 to 100 GHz was 0.15 dB or less in the 22 to 33 GHz band and within the range of 0.50 dB or less in the 70 to 100 GHz band. This confirmed that the optical reflector made of the micro-foamed resin sheet has almost no angle dependence when radio waves pass through it. 【0101】 For comparison, a 40% GF fiber-reinforced PPS resin sheet (not a micro-foamed resin sheet) was used, and the increase in radio wave attenuation when passing through the PPS resin sheet was evaluated by varying the inclination of the resin sheet relative to the antenna surface in the range of 0° to 45°. The results showed that the loss increased with increasing inclination angle, and compared to the attenuation in the case of air, which is within the specified range of the present invention, an attenuation of more than 0.50 dB was observed when the wavelength was 70 to 100 GHz. However, in the case of a micro-foamed resin sheet with a PET resin optical reflector, the attenuation was 0.20 dB. This confirmed that even when the resin sheet is placed at an angle relative to the antenna surface, the angle dependence of the radio wave transmission loss is not very large, and therefore the radio wave transmission loss does not increase. 【0102】 Furthermore, the micro-foamed resin sheet preferably has an average bubble diameter in the range of 0.2 μm to 10 μm. If the average bubble diameter is too small compared to 0.2 μm, the light transmittance will increase and the reflectance will decrease. Also, if the average bubble diameter is too large, the diffuse reflectance will decrease, so it is desirable that the average bubble diameter be between 0.2 μm and 10 μm. 【0103】 (Front cover member and the light guide space formed thereafter) A front cover member 3, made of at least a light-transmitting material, is positioned in front of the group of LED light sources (light reflector 5), and all LED light sources 7 are covered by the front cover member 3. The front cover member 3 and the portion of the light reflector 5 that covers the light-emitting surface of the LED light sources 7 and the wireless communication device antenna 11 are formed to be separated by a predetermined distance. As a result, a light guide space is formed between the front cover member 3 and the light reflector 5 on which the group of LED light sources is arranged. 【0104】 The front cover member 3 is formed from a light-transmitting resin or glass. If the front cover member 3 is formed from a light-transmitting resin, for example, it can be a transparent resin such as PC resin, ABS resin, PET resin, PVC resin, PMMA resin, or any other acrylic resin or polystyrene resin, or a translucent resin with a pigment added to a transparent resin, or a resin having a translucent structure on its surface. If the front cover member 3 is formed from glass, it can be transparent silica glass or translucent glass. 【0105】 Thus, the light-transmitting member constituting the front cover member 3 is not limited to a transparent light-transmitting member, but may also be a translucent light-transmitting member. More specifically, as a resin having a translucent structure, for example, a translucent resin that has been made translucent by forming an uneven structure on the surface of a light-transmitting transparent resin on the light-extraction side can also be applied. 【0106】 Furthermore, for the translucent light-transmitting member, a transparent resin can be used, and as a white pigment, for example, titanium dioxide, zinc oxide, talc, mica, or kaolin can be used. As the translucent glass, either translucent colored glass or glass with a translucent resin film attached to its surface can be used. Alternatively, a translucent resin may be used, in which a translucent resin film or the like is attached to the surface of a transparent resin or glass. Thus, a laminate in which a translucent resin film or the like is attached to the surface of a transparent resin or glass may be used, but an FF sheet, which is a polyester film coated with PVC resin, may also be used. 【0107】 Furthermore, if the lighting device 1 is a street lamp, considering the reduction in brightness of the lighting device 1, it is basically preferable to use transparent resin or transparent glass for the front cover member 3. However, making it semi-transparent can suppress the feeling of glare that drivers experience when looking up at the street lamp. However, semi-transparency that leads to a large reduction in brightness is undesirable considering this application. 【0108】 (Indirect light emission due to the uneven surface structure of the front cover member) Furthermore, the front cover member 3 may have a geometric uneven structure on either its inner or outer surface, which is made of light-transmitting resin or glass. By forming such a geometric uneven structure, mutual diffuse reflection can be repeatedly performed between the geometric uneven structure and the light reflector 5. As a result, the light extracted from the lighting device 1 can be made indirect light, or indirect light can be achieved by randomizing the direction of light extraction. In addition, light components that do not undergo repeated mutual reflection can also be made uniform by randomizing the incident angle of the light incident on the front cover member 3 and the exit angle of the light emitted by forming a geometric uneven structure. 【0109】 Behind the circuit board 9 (the portion formed in a nearly straight line from the light reflector 5), a wireless communication device antenna 11 is positioned. The wireless communication device antenna 11 is a device capable of emitting radio waves and can be applied to frequency bands currently used in 5G communication, for example. 【0110】 (Rear cover member, electromagnetic wave absorbing member, and their effects) Furthermore, an electromagnetic wave absorbing member 13 is positioned behind the circuit board 9 and the wireless communication device antenna 11. The electromagnetic wave absorbing member 13 is positioned to cover the back and sides of the lighting device 1. A rear cover member 15 is positioned on the back side of the lighting device 1. The material forming the rear cover member 15 is either resin or metal. Inside the rear cover member 15, the electromagnetic wave absorbing member 13, which is made of an electromagnetic wave absorber, is positioned. 【0111】 Here, the electromagnetic wave absorbing member 13 needs to have low reflection and transmission of electromagnetic waves, and high absorption. All the energy of the electromagnetic waves absorbed by the electromagnetic wave absorbing member 13 is converted into heat. The material of the electromagnetic wave absorbing member 13 can be classified into three types based on the mechanism by which electromagnetic waves are converted into heat: resistive materials, dielectric materials, and magnetic materials. It is desirable that the heat absorbed by the radio wave absorber be released to the outside so that the temperature of the absorber itself does not rise. 【0112】 The radio waves absorbed by the electromagnetic wave absorbing member 13 are classified into reflected waves coming from relatively far distances, such as radar from aircraft and ships, noise inside electronic equipment casings, and reflected waves that are intermediate between the two, such as those generated when indoor wireless LANs are installed. These are further classified into far-field electromagnetic fields, near-field electromagnetic fields, and quasi-near-field electromagnetic fields. Here, the heat absorption by the first resistive material radio wave absorber is similar to the heat generation due to electrical resistance; the kinetic energy of the radio waves accelerated by the electric field of external radio waves into the resistive material and then colliding with the lattice inside the resistive material and coming to a stop is converted into thermal energy. Resistive material radio wave absorbers include resistive coatings, resistive fibers, and conductive paints. 【0113】 Furthermore, many dielectric material radio wave absorbers exhibiting the second type of dielectric loss utilize conductive powders such as carbon mixed into an insulator such as rubber or foam. Even when an electric field is applied to such materials by radio waves, no current flows at low frequencies. However, as the frequency increases, the impedance of the capacitor decreases inversely proportional to the increase in frequency, causing current to flow through the resistor, resulting in heat generation in the resistor. In the case of this dielectric loss type, the frequency band in which absorption performance is obtained changes depending on the content of conductive powder. For example, by stacking materials with multiple content patterns, the absorption performance can be broadened. 【0114】 For magnetic material radio wave absorbers exhibiting a third type of magnetic loss, materials are used that are mixed with magnetic powders such as ferrite, carbonyl iron, or sendust, which have magnetic permeability, into rubber or resin. This magnetic loss is achieved when radio waves basically act on a magnetic field, and the magnetic field is absorbed internally and converted into heat. In the case of this type of magnetic loss, an absorption effect can be obtained even with a relatively small size, but since the "permeability" and "thickness" of the sheet tend to be directly related to the absorption performance, it is necessary to control these values ​​in order to increase the amount of magnetic field absorbed. In addition to the above, combinations of multiple radio wave absorbers, such as dielectric material radio wave absorbers and magnetic material radio wave absorbers, may also be used. 【0115】 Here, the first resistive material radio wave absorber has been put into practical use as a λ / 4 absorber in wavelength bands up to the millimeter wave band. The electromagnetic wave absorbing member 13 can be made of any of these resistive material radio wave absorbers, dielectric material radio wave absorbers, or magnetic material radio wave absorbers, or a combination of these radio wave absorbers, or a multiple layer stack of these radio wave absorbers. 【0116】 Thus, the radio wave absorber can be either the second dielectric type or the third magnetic type. For example, as a dielectric type, a dielectric sheet can be attached to an aluminum film, or a dielectric coating containing carbon can be applied. As a magnetic type, ferrite tiles can be used, which are made by adding zinc, nickel, manganese, etc. as additives to iron oxide powder, molding them into tiles, and then firing them at high temperatures, or resin sheets in which powders such as iron oxide are dispersed. 【0117】 In this way, by arranging the electromagnetic wave absorbing member 13 behind the lighting device 1, leakage of radio waves from parts other than the direction of radio wave irradiation (in front of the lighting device 1) can be suppressed. For example, if the lighting device 1 is a street light, the impact of radio waves emitted from the wireless communication device antenna 11 on vehicles other than those intended to travel on the road, as well as the surrounding external environment, can be reduced. 【0118】 (Relationship between the arrangement of LED light sources and antennas) Here, in the lighting device 1, the LED light source 7 (circuit board 9) and the wireless communication device antenna 11 are positioned offset in the longitudinal direction of the light reflector 5 so that the light-emitting surfaces of the LED light source group do not obstruct the radiating surface of the wireless communication device antenna 11. For example, one of the LED light source group and the wireless communication device antenna 11 are positioned at both ends of the light reflector 5, and the other is positioned towards the center of the light reflector 5. 【0119】 As shown in Figure 2(b), in this embodiment, the wireless communication device antenna 11 is positioned behind the central part of the light reflector 5 in the longitudinal direction of the light reflector 5, and the LED light source group is arranged on the circuit board 9 such that the light-emitting surfaces of each LED light source 7 are positioned in front of the light reflector 5 on both sides of the wireless communication device antenna 11, sandwiching the antenna 11. In other words, neither the LED light source 7 nor the circuit board 9 are positioned approximately in the center of the light reflector 5, and the wireless communication device antenna 11 is positioned on the back side of the light reflector 5 in the area where the LED light source 7 is not positioned. That is, the circuit board 9 has an annular shape with a cutout in the center. 【0120】 (Relationship between the direction of illumination of the LED light source and the direction of radiation of radio waves from the antenna) The direction of light emission from the LED light source 7 is approximately perpendicular to the light reflector 5 (the front of the lighting device 1). However, the radiation angle of the main lobe emitted from the wireless communication device antenna 11 may be tilted rather than perpendicular to the light reflector 5 (the front of the lighting device 1). In other words, the wireless communication device antenna 11 may be tilted relative to the LED light source group so that the center line of the main beam of the radio waves emitted from the wireless communication device antenna 11 is offset by a predetermined angle from the center line of the irradiation direction of the LED light source group. 【0121】 For example, as shown in Figure 2(a), the radiation angle of the main lobe radiated from the wireless communication device antenna 11 may be tilted in the direction of the short side of the lighting device 1 with respect to the direction perpendicular to the short side of the lighting device 1 (the direction of light emission (center line of the irradiated light)) (angle θ1 in the figure). Similarly, as shown in Figure 2(b), the radiation angle of the main lobe radiated from the wireless communication device antenna 11 may be tilted in the direction of the long side of the lighting device 1 with respect to the direction perpendicular to the long side of the lighting device 1 (the direction of light emission (center line of the irradiated light)) (angle θ2 in the figure). 【0122】 Furthermore, it may be possible to adjust the angle of the wireless communication device antenna 11 by providing an angle adjustment mechanism in the antenna fixing part 17 so that the radiating surface of the wireless communication device antenna 11 is aligned with the orientation of the arrangement plane of the LED light source group (the orientation of the circuit board 9), or is positioned at a predetermined angle. 【0123】 (Structure of the angle adjustment mechanism for the antenna mounting part and setting of the antenna angle) Figure 7(a) is a plan view of the antenna fixing part 17, and Figure 7(b) is a side view of the antenna fixing part 17. The antenna fixing part 17 is composed of, for example, a bracket 19, a spherical part 25, an antenna support member 23, an antenna support plate 24, etc. The wireless communication device antenna 11 may be fixed to the antenna support plate 24 as shown in the figure, or it may be fixed directly to the antenna support member 23. The bracket 19 has a pair of plate-like parts, which are arranged substantially parallel to each other with a predetermined distance between them. 【0124】 Round holes are provided in the plate-shaped portion of the bracket 19 at positions opposite to each other. Also provided are wing nuts 27 that pass through the plate-shaped portions and nuts 21 that secure the wing nuts 27. An antenna support member 23 is provided on the back side of the wireless communication device antenna 11, and a spherical portion 25, which is roughly spherical, is positioned at the end of the antenna support member 23. 【0125】 The spherical part 25 fits into the round hole in the plate-shaped part of the bracket 19 and is held in place by the plate-shaped part. When the wing nut 27 is loosened, the spherical part 25 can rotate freely while fitted into the round hole. Therefore, the antenna support member 23 can be freely oriented relative to the bracket 19. As a result, the angle of the wireless communication device antenna 11 can be freely adjusted in all directions. After adjusting the angle of the wireless communication device antenna 11, the angle of the wireless communication device antenna 11 can be fixed by tightening the wing nut 27. 【0126】 Alternatively, instead of the antenna fixing part 17, the antenna fixing part 17a shown in Figure 8 may be used. Figure 8(a) is a plan view of the antenna fixing part 17a, and Figure 8(b) is a side view of the antenna fixing part 17a. The antenna fixing part 17a mainly consists of a support shaft 32, a rotating member 39, an antenna support member 35, an antenna support plate 34, etc. 【0127】 The support shaft 32 is fixed to the rear cover member 15 or the like, and is a shaft member that stands upright, for example, pointing upward. The support shaft 32 is inserted into the bearing portion of the rotating member 39. That is, the rotating member 39 is rotatable horizontally with the support shaft 32 as its axis of rotation. An angle fixing screw 33 passes through the rotating member 39, and by tightening the angle fixing screw 33, the rotating member 39 is fixed to the support shaft 32 at that angle. 【0128】 A pair of opposing plate-shaped members are fixed to the rotating member 39, and it has a support shaft 41 that penetrates the plate-shaped members and slits 43 formed in each plate-shaped member. The slits 43 are formed in an arc shape centered on the support shaft 41. The wireless communication device antenna 11 may be fixed to one end of the antenna support member 35 via an antenna support plate 34 as shown in the figure, or it may be fixed directly to the antenna support member 35. The vicinity of the other end of the antenna support member 35 is connected to the rotating member 39 by the support shaft 41. 【0129】 An angle fixing screw 37 is provided on the antenna support member 35, and the angle fixing screw 37 is positioned on both outer sides of the slit 43. When the angle fixing screw 37 is loosened, the antenna support member 35 can rotate vertically around the support shaft 41 as the center of rotation. When the antenna support member 35 is at a predetermined angle, the angle fixing screw 37 is tightened, fixing the antenna support member 35 to the rotating member 39 at that angle. In this way, the angle of the wireless communication device antenna 11 can be freely varied by the support shafts 32 and 41 which are in different directions, and the angle of the wireless communication device antenna 11 can be fixed by the angle fixing screws 33 and 37. 【0130】 Alternatively, the antenna fixing part 17b shown in Figure 9 may be used. Figure 9(a) is a plan view of the antenna fixing part 17b, and Figure 9(b) is a side view of the antenna fixing part 17b. The antenna fixing part 17b mainly consists of support arms 45, 47, a support shaft 53, an antenna support member 55, an antenna support plate 54, etc. 【0131】 The support arm 45 is fixed to the rear cover member 15 or the like. One end of the support arm 47 is connected to the vicinity of the end of the support arm 45. In this case, the support arm 45 and the support arm 47 are connected so as to be rotatable in the vertical direction by a support shaft that penetrates, for example, in the horizontal direction. An angle fixing screw 49 is placed on the support shaft, and the support arm 45 and the support arm 47 are fixed by tightening the angle fixing screw 49. 【0132】 A support shaft 53 is positioned at the other end of the support arm 47. The support shaft 53 is inserted, for example, from above the support arm 47 into a bearing formed in the support arm 47. The wireless communication device antenna 11 may be fixed to the support shaft 53 via an antenna support plate 54 on the antenna support member 55 as shown in the figure, or the wireless communication device antenna 11 may be directly fixed to the antenna support member 55. In other words, the wireless communication device antenna 11 is rotatable horizontally relative to the support arm 47 with the support shaft 53 as the axis of rotation. 【0133】 An angle fixing screw 51 passes through the support arm 47. By tightening the angle fixing screw 51, the support shaft 53 is fixed to the support arm 47 at that angle. In this way, the angle of the wireless communication device antenna 11 can be freely varied by the rotation axes in different directions, and the angle of the wireless communication device antenna 11 can be fixed by the angle fixing screws 49 and 51. 【0134】 Furthermore, the structure of the antenna fixing part is not limited to the antenna fixing parts 17, 17a, and 17b shown in Figures 7 to 9. Any other known structure is acceptable as long as it is possible to adjust and fix the angle of the wireless communication device antenna 11, and any of these structures can be used as the angle adjustment mechanism for the wireless communication device antenna 11. 【0135】 Furthermore, the difference in angle between the center line of the main lobe of the wireless communication device antenna 11 and the direction of light irradiation from the LED light source group (center line of the irradiated light) is preferably 0-45°, more preferably 5-30°, and even more preferably 5-20°. The difference in angle between these two (offset angle) is usually small, but depending on the application and installation location, it may be set to be larger, smaller, or to match the angles of the two. 【0136】 (How to use and where to install lighting equipment) Figure 10(a) shows a method of using the lighting device 1 (a method of installing the lighting device 1 with a built-in wireless communication device). This embodiment shows the case where the lighting device 1 is a street light. The lighting device 1 can illuminate the road and communicate with vehicles traveling on the road using radio waves emitted from the wireless communication device antenna 11. In this case, the light from the lighting device 1 can illuminate the entire road, and the direction of the radio waves emitted from the wireless communication device antenna 11 can be directed to a different location on the vehicle where the receiving device is located. 【0137】 In this case, as mentioned above, the angle of the center line of the main lobe of the wireless communication device antenna 11 can be adjusted with respect to the direction of light irradiation from the LED light source group (center line of the irradiated light), so the direction of light irradiation and the direction of radio wave emission can be adjusted separately depending on the installation location. 【0138】 Furthermore, the lighting device 1 is applicable to applications other than streetlights. Figure 10(b) shows another way to use the lighting device 1. As shown in Figure 10(b), the lighting device 1 can also be used as other indoor and outdoor lighting. For example, the lighting device 1 can be installed in indoor facilities such as city halls, community centers, and large commercial facilities, or in outdoor facilities such as parks, baseball fields, and stadiums, and can be used as a lighting device that utilizes communication functions. 【0139】 (Features of the lighting device of the first embodiment) As described above, according to this embodiment, the wireless communication device antenna 11 is arranged so as not to overlap with the LED light source group (circuit board 9), so the LED light source group (circuit board 9) does not shield the radiating surface of the wireless communication device antenna 11. Therefore, electromagnetic waves emitted from the wireless communication device antenna 11 are not absorbed by the circuit board 9. 【0140】 Furthermore, since the light reflector 5 is made of a micro-foamed resin sheet with a lower dielectric constant and lower radio wave absorption compared to the circuit board 9, radio wave loss can be reduced compared to the case where the circuit board 9 is placed in front of the wireless communication device antenna 11. For example, it is desirable that the dielectric constant of the micro-foamed resin sheet constituting the light reflector 5 be 1.8 or less, while the dielectric constant of the glass epoxy substrate is 4.5 to 5.2. 【0141】 Here, if the wireless communication device antenna 11 is exposed and positioned behind the front cover member 3 (in front of the light reflector 5), the LED light source 7 is not positioned in front of the wireless communication device antenna 11. As a result, the brightness level of the area around the wireless communication device antenna 11 decreases compared to the area where the LED light source 7 is positioned, making it darker. In contrast, by positioning the light reflector 5 in front of the wireless communication device antenna 11, this localized decrease in brightness level can be prevented, improving the brightness level of the lighting device 1, preventing a decrease in the aesthetic appeal of the lighting device 1. Furthermore, the diffuse reflectivity of the light reflector 5 allows for a wider angle of illumination of the light emitted from the lighting device 1. Even when the light reflector 5 is positioned in front of the wireless communication device antenna 11, because the light reflector 5 is made of a micro-foamed resin sheet, its dielectric constant is low, reducing radio wave absorption. 【0142】 Furthermore, because the light reflector 5 has a high diffuse reflectance, even in the area in front of the wireless communication device antenna 11 where no LED light source 7 is located, the diffuse reflection from the surrounding LED light source 7 by the front cover member 3 and the light reflector 5 prevents the area from becoming dark, thus providing brightness and ensuring aesthetic appeal. 【0143】 Furthermore, since the electromagnetic wave absorbing member 13 is provided behind the wireless communication device antenna 11, it is possible to shield the side lobes and back lobes transmitted from the wireless communication device. As a result, the impact on the external environment due to radio waves leaking from the sides and rear of the lighting device 1 can be reduced. 【0144】 Furthermore, the antenna fixing part 17 allows for adjustment of the positioning angle of the wireless communication device antenna 11, thereby adjusting the radiation angle of the main lobe emitted from the wireless communication device antenna 11. For example, when used as a street light, the direction of the main lobe of the wireless communication device antenna 11 can be adjusted to a predetermined position on the vehicle, and the light from the LED light source 7 can be emitted in a direction that efficiently illuminates the road. 【0145】 Furthermore, the front cover member 3 can be not only a transparent light-transmitting member, but also a translucent light-transmitting member, or a translucent laminate in which a translucent resin film is attached to the surface of a transparent resin or transparent glass. This makes it possible to express colors in a more complex and sophisticated way. 【0146】 Furthermore, by forming a geometric uneven structure on the inside of the front cover member 3, multiple reflections can be repeatedly performed between the inner surface of the front cover member 3 and the light reflector 5, which has the effect of creating indirect light. 【0147】 (Second embodiment) Next, a second embodiment will be described. Figure 11 is a diagram showing the lighting device 1a according to the second embodiment, and is a cross-sectional view along the FF line of Figure 12(a) (a view cut at a predetermined height of the front cover member 3), where Figure 12(a) is a cross-sectional view along the DD line of Figure 11, and Figure 12(b) is a cross-sectional view along the EE line of Figure 11. In the following description, components that perform the same functions as lighting device 1 will be denoted by the same reference numerals as in Figures 1 to 10, and redundant explanations will be omitted. 【0148】 Lighting device 1a has a structure substantially the same as lighting device 1, but the shape of the light reflector 5 is different. Similar to lighting device 1, in lighting device 1a, the wireless communication device antenna 11 is positioned in the center of the light reflector 5 in the longitudinal direction of the light reflector 5, and the LED light source group is positioned on both sides of the wireless communication device antenna 11, surrounding it from both the short and long directions of the lighting device. 【0149】 The light reflector 5, when viewed from a side view from a direction perpendicular to the surface of the light reflector 5 (Figures 12(a) and 12(b)), has a projection 29 in the center of the longitudinal direction of the light reflector 5 (the vertical direction in Figure 12(b)). The projection 29 is a part of the light reflector 5 that protrudes forward. More specifically, the projection 29 has a roughly trapezoidal cross-section, protrudes with a slightly tapering diameter toward the front, and is formed to be roughly flat except for the protruding step portion. The front cover member 3 and the light-emitting surface of the LED light source 7 or the surface of the light reflector 5 are formed to be separated by a predetermined distance. 【0150】 Behind the projection 29 (the part of the light reflector 5 that protrudes forward), the wireless communication device antenna 11 is positioned. As mentioned above, the antenna fixing part 17 can freely change the orientation of the wireless communication device antenna 11. For example, as shown in Figure 12(a), the radiation angle of the main lobe radiated from the wireless communication device antenna 11 with respect to the direction of light emission (center line of the irradiated light) may be shifted in the short direction of the lighting device 1a (angle θ3 in the figure). Similarly, as shown in Figure 12(b), the radiation angle of the main lobe radiated from the wireless communication device antenna 11 with respect to the direction of light emission (center line of the irradiated light) may be shifted in the long direction of the lighting device 1a (angle θ4 in the figure). 【0151】 Furthermore, the light from the LED light source 7, which is positioned on the outer circumference of the light reflector 5, is guided to the protrusion 29 of the light reflector 5 through diffuse reflection and mutual reflection with the front cover member 3. This ensures that a predetermined level of brightness can be provided even if the LED light source 7 is not positioned on the protrusion 29, thus maintaining aesthetic appeal. At the same time, the brightness level of the lighting device 1a can be improved by preventing light absorption by the wireless communication device antenna 11. Moreover, because the light reflector 5 has high diffuse reflectivity, it becomes possible to extract the irradiated light emitted from the lighting device 1a at a wide angle. 【0152】 In this case, at least the central portion of the light reflector 5 corresponding to the front of the wireless communication device antenna 11 is formed to protrude forward in a predetermined shape, thereby securing a movable area for adjusting the tilt angle of the wireless communication device antenna 11. In other words, compared to the lighting device 1, the adjustment range of the tilt angle of the wireless communication device antenna 11 can be widened. 【0153】 Even with this type of lighting device 1a, the same effects as the lighting device 1 described above can be obtained. Furthermore, by providing a projection 29 in the central part of the light reflector 5 that corresponds to the front of the wireless communication device antenna 11, a wider area can be secured for assigning an inclination angle to the wireless communication device antenna 11. 【0154】 (Third embodiment) Next, a third embodiment will be described. Figure 13 is a diagram showing the lighting device 1b according to the third embodiment, and is a cross-sectional view of line II in Figure 14(a) (a diagram cut at a predetermined height of the front cover member 3, similar to that in Figure 11), where Figure 14(a) is a cross-sectional view of line GG in Figure 13, and Figure 14(b) is a cross-sectional view of line HH in Figure 13. The lighting device 1b has substantially the same structure as the lighting device 1a, but the shape of the projection 29 is different. 【0155】 Similar to lighting device 1a, lighting device 1b also has the wireless communication device antenna 11 positioned in the center of the light reflector 5 in the longitudinal direction of the light reflector 5, and the LED light source group is positioned on both sides of the wireless communication device antenna 11, sandwiching it from both the short and long directions of the lighting device. Furthermore, the shape of the light reflector 5 in a side view from a direction perpendicular to the surface of the light reflector 5 (Figures 14(a) and 14(b)) has a projection 29 provided in the center of the longitudinal direction of the light reflector 5 (the vertical direction in Figure 14(b)). The projection 29 is a shape in which a part of the light reflector 5 protrudes forward. 【0156】 In this embodiment, as shown in Figure 14(a), the cross-sectional shape of the projection 29 is approximately triangular in the cross-section in the short direction of the lighting device 1b, and as shown in Figure 14(b), the cross-sectional shape of the projection 29 is approximately trapezoidal in the cross-section in the long direction of the lighting device 1b. That is, the ridge of the projection 29 is formed almost parallel to the long direction of the lighting device 1b, and it has a tapered shape that widens from the ridge in both the short and long directions of the lighting device 1b. 【0157】 In this embodiment as well, the wireless communication device antenna 11 is positioned on the back side of the projection 29. Furthermore, as mentioned above, the antenna fixing part 17 can freely change the orientation of the wireless communication device antenna 11. For example, as shown in Figure 14(a), the radiation angle of the main lobe radiated from the wireless communication device antenna 11 with respect to the direction of light emission (center line of the irradiated light) may be shifted in the short-side direction of the lighting device 1b (angle θ5 in the figure). Similarly, as shown in Figure 14(b), the radiation angle of the main lobe radiated from the wireless communication device antenna 11 with respect to the direction of light emission (center line of the irradiated light) may be shifted in the long-side direction of the lighting device 1b (angle θ6 in the figure). 【0158】 In this case, at least the central portion of the light reflector 5 corresponding to the front of the wireless communication device antenna 11 is formed to protrude forward in a predetermined shape, thereby securing an area for adjusting the tilt angle of the wireless communication device antenna 11. In other words, compared to the lighting device 1, the adjustment range of the tilt angle of the wireless communication device antenna 11 can be widened. 【0159】 This type of lighting device 1b can achieve the same effects as the lighting device 1a described above. Furthermore, because the projection 29 has a tapered shape that faces forward relative to the LED light sources 7 surrounding the projection 29, reflected light from the projection 29 can be efficiently emitted forward. As a result, the decrease in brightness in the projection 29 where no LED light sources 7 are located is suppressed, and light can be extracted with more uniform brightness. 【0160】 Furthermore, the shape of the projection 29 that protrudes forward in at least one of the longitudinal or transverse directions of the light reflector 5 may be a convex shape including a substantially trapezoidal shape, a triangular shape, or a convex curve including a circular arc with a large radius of curvature. In this case as well, as in the other embodiments, even if the LED light source 7 is not placed on the projection 29 of the light reflector 5, a predetermined level of brightness can be provided to the projection 29, thereby ensuring aesthetic appeal by reducing the brightness difference between the projection 29 and the part where the LED light source 7 is placed. Also, as in the second embodiment, the brightness level of the lighting device 1b can be improved by preventing light absorption by the wireless communication device antenna 11, and furthermore, since the light reflector 5 has high diffuse reflectivity, it becomes possible to extract the irradiated light emitted from the lighting device 1b at a wide angle. 【0161】 (Fourth embodiment) Next, a fourth embodiment will be described. Figure 15 is a diagram showing the lighting device 1c according to the fourth embodiment, and is a cross-sectional view along line LL of Figure 16(a) (a view obtained by cutting the front cover member 3 of Figure 15 at a predetermined height), where Figure 16(a) is a cross-sectional view along line JJ of Figure 15, and Figure 16(b) is a cross-sectional view along line KK of Figure 15. The lighting device 1c has substantially the same structure as the lighting device 1, but the form of the LED light source 7 and the light reflector 5 are different. 【0162】 Similar to lighting device 1, the lighting device 1c has the wireless communication device antenna 11 positioned in the center of the light reflector 5 in the longitudinal direction of the light reflector 5, and the LED light source group is positioned on both sides of the wireless communication device antenna 11 in the longitudinal direction, sandwiching the antenna 11 from the longitudinal direction. Furthermore, the shape of the light reflector 5 in a side view (up and down direction in Figure 16(b)) of the lighting device 1c, in a direction perpendicular to the surface of the light reflector 5, is such that both ends of the light reflector 5 in the longitudinal direction protrude forward. 【0163】 More specifically, the LED light source 7 (circuit board 9) is not located in the longitudinal center of the lighting device 1c, and the wireless communication device antenna 11 is located on the back of the light reflector 5. Furthermore, the light reflector 5 in front of the wireless communication device antenna 11 is formed flat. LED light sources 7 are arranged at both longitudinal ends of the lighting device 1c, and the light reflector 5 is formed to gradually protrude forward towards both longitudinal ends. Although the light reflector 5 in front of the wireless communication device antenna 11 is formed flat, it can be made to protrude forward if necessary. 【0164】 In this way, the direction of light emission (the center line of the irradiated light) can be tilted from both sides along the longitudinal direction of the lighting device 1c toward the center (θ7 in Figure 16(b)). As a result, the light emitted from each group of LED light sources located at both ends along the longitudinal direction of the light reflector 5 is diffusely reflected and guided to the center of the light reflector 5 where no LED light sources 7 are located, thereby increasing the brightness in the irradiated area of ​​a predetermined region. 【0165】 In this case, the radiation direction of the main lobe emitted from the wireless communication device antenna 11 may be directed perpendicular to the reflective surface of the front light reflector 5, or it may be tilted at a predetermined angle. Even in this case, the radiation position of the main lobe can be adjusted by adjusting the arrangement angle of the wireless communication device antenna 11 and adjusting the radiation angle of the main lobe emitted from the wireless communication device antenna 11. Therefore, the wireless communication device antenna 11 can be tilted relative to the LED light source group such that the center line of the main beam of the radio waves emitted from the wireless communication device antenna 11 is shifted by a predetermined angle with respect to the center line of the irradiation direction of at least one of the LED light source groups at both ends in the longitudinal direction of the light reflector 5. 【0166】 Even with such a lighting device 1c, the same effects as the lighting device 1 described above can be obtained. Furthermore, by forming inclines on both ends of the light reflector 5 and overlapping the light emitted from each LED light source group positioned at both ends of the light reflector 5, the light emitted from the LED light source group can be diffusely reflected inside the lighting device 1c and guided to a predetermined area, thereby increasing the brightness in the illumination range of the predetermined area. In this way, by having a shape in which, when viewed from a side view from a direction perpendicular to the surface of the light reflector 5, at least a part of either the ends or the center of the light reflector 5 in the longitudinal direction of the light reflector 5 protrudes forward, the degree of freedom in adjusting the direction of light irradiation from the LED light source group and adjusting the arrangement angle of the wireless communication device antenna 11 can be increased. 【0167】 Furthermore, with the centerlines of the light rays emitted from the LED light source group intersect at a predetermined height at a predetermined position in the space below the lighting device 1c, the angle adjustment mechanism allows the angle of the placement surface of the wireless communication device antenna 11 to be adjusted so that the centerline of the main beam of the wireless communication device antenna 11 passes through the position where the centerlines of the LED light source group intersect, or at a position offset by a predetermined distance. In this way, by adjusting the angle adjustment mechanism to a predetermined angle, the placement angle of the wireless communication device antenna 11 can be adjusted, providing a method for adjusting the angle of the wireless communication device antenna 11 of a lighting device 1c with a built-in wireless communication device. 【0168】 (Fifth embodiment) Next, a fifth embodiment will be described. Figure 17 is a diagram showing a lighting device 1d according to the fifth embodiment, and is a cross-sectional view along line OO of Figure 18(a) (a view obtained by cutting the front cover member 3 of Figure 17 at a predetermined height), Figure 18(a) is a cross-sectional view along line MM of Figure 17, and Figure 18(b) is a cross-sectional view along line NN of Figure 17. The lighting device 1d has substantially the same structure as the lighting device 1, but the arrangement of the LED light source 7 and the wireless communication device antenna 11 is different. 【0169】 In the lighting device 1d, the LED light source group is arranged on the circuit board 9 such that the light-emitting surfaces of each LED light source 7 are positioned in front of the central part of the light reflector 5 in the longitudinal direction of the light reflector 5, and the wireless communication device antenna 11 is positioned behind the light reflector 5 on both sides in the longitudinal direction of the LED light source group, sandwiching the LED light source group. In other words, a pair of wireless communication device antennas 11 are arranged. 【0170】 Furthermore, as shown in Figure 18(b), both ends of the light reflector 5 in the longitudinal direction are formed to extend forward in a predetermined shape. That is, the light reflector 5 is formed to gradually protrude forward from the central part of the light reflector 5 (where the LED light source group is located) toward both ends of the light reflector 5 in the longitudinal direction that cover the wireless communication device antenna 11. By making both ends of the light reflector 5 in the longitudinal direction (in front of the wireless communication device antenna 11) protrude forward in this way, a movable area for assigning an inclination angle to the wireless communication device antenna 11 is secured, and at the same time, the brightness on both ends of the light reflector 5 where the LED light source 7 is not located can be increased compared to when the light reflector 5 is not tilted. 【0171】 Therefore, the radiation direction of the main lobe emitted from the wireless communication device antenna 11 can be tilted from both sides in the longitudinal direction of the lighting device 1d toward the center (θ8 in Figure 18(a), θ9 in Figure 18(b)). In other words, each wireless communication device antenna 11, which is located at both ends in the longitudinal direction of the light reflector 5, is positioned at an angle with respect to the LED light source group such that the center line of the main beam of the radio waves emitted from each wireless communication device antenna 11 is shifted by a predetermined angle with respect to the center line of the irradiation direction of the LED light source group. 【0172】 In this way, the radio waves emitted from the respective wireless communication device antennas 11, which are positioned at both ends of the optical reflector 5 in the longitudinal direction, can be superimposed on the optical reflector 5. This makes it possible to increase the radio wave intensity from the wireless communication device antennas 11. 【0173】 Furthermore, in this embodiment, the light reflector 5 is made of a micro-foamed resin sheet molded body in which a large number of cup-shaped recesses 31 are formed in a predetermined arrangement pattern. At the bottom of each recess 31, individual LED light sources 7 are arranged so as to be surrounded by the recess 31. In this way, a large number of LED light sources 7 are arranged in each of the numerous recesses 31. By making the light reflector 5 a molded body in which a large number of cup-shaped recesses 31 are formed, the amount of diffuse reflection by the inner circumferential surface of the recesses 31 with respect to the light from the LED light sources 7 can be increased, and the difference in the brightness distribution of the light extracted from the part of the light reflector 5 where the LED light sources are not arranged and the part where the LED light sources are arranged can be mitigated and made more uniform. 【0174】 Even with such a lighting device 1d, the same effects as the aforementioned lighting device 1 can be obtained. Furthermore, the radio waves emitted from each wireless communication device antenna 11, which are positioned at both ends in the longitudinal direction of the light reflector 5, can be superimposed, thereby increasing the radio wave intensity from the wireless communication device antenna 11. 【0175】 Furthermore, with the wireless communication device antenna 11 positioned such that the center line of the main beam of the radio waves emitted from the antenna 11 intersects at a predetermined position at a predetermined height in the space below the lighting device 1d, the angle adjustment mechanism can be used to adjust the angle of the placement surface of the wireless communication device antenna 11 so that the center line of light from the LED light source group passes through the position where the main beam of the wireless communication device antenna 11 intersects, or passes through a position offset by a predetermined distance. In this way, by adjusting the angle adjustment mechanism to a predetermined angle, the placement angle of the wireless communication device antenna 11 can be adjusted, thereby providing a method for adjusting the angle of the wireless communication device antenna 11 of a lighting device 1d that incorporates a wireless communication device. 【0176】 As described above, the lighting device of the present invention incorporates a wireless communication device, and the radio waves emitted from the wireless communication device antenna 11 are emitted in a predetermined direction. Unwanted radio waves are absorbed by an electromagnetic wave absorbing member 13 located inside the rear cover member 15 of the lighting device. Therefore, it can be installed not only as a road lighting device but also in outdoor public facilities such as parks, baseball fields, and stadiums, as well as indoor facilities such as city halls, community centers, and large commercial facilities. Furthermore, the angle adjustment mechanism makes it possible to adjust the center line of the irradiation direction of the LED light source group and the center line of the main beam of the radio waves emitted from the wireless communication device antenna 11 so that they are offset from each other by a predetermined angle. As a result, it is possible to provide a method for adjusting the angle of the antenna of a lighting device and a method for installing the lighting device using this mechanism. 【0177】 Furthermore, a light reflector 5 made of micro-foamed resin sheet is placed in front of the wireless communication device antenna 11, and reflected light from the light reflector 5, which is positioned behind the light-emitting surface of the LED light source group, is guided to the portion of the light reflector 5 that covers the wireless communication device antenna 11. As a result, a predetermined brightness level can be secured even if the LED light source 7 is not positioned in front of the light reflector 5. In addition, by preventing light absorption by the wireless communication device antenna 11, the brightness of the lighting device can be increased, and because the light reflector 5 has high diffuse reflectivity, light can be extracted from the lighting device at a wide angle. 【0178】 Furthermore, the wireless communication device antenna 11 is not exposed in front of the light reflector 5, enhancing the aesthetic appeal while simultaneously minimizing radio wave absorption by the micro-foamed resin sheet, thus realizing a lighting device with excellent design that incorporates a wireless communication device. Moreover, it is possible to provide a light reflector that minimizes loss when radio waves of a predetermined wavelength, especially millimeter waves, are transmitted over a wide angle. In this invention, in all embodiments, the light reflector 5 is cut out at positions corresponding to the LED light sources 7 on a circuit board 9 in which the LED light sources 7 are regularly arranged, and this light reflector 5 is placed over the circuit board 9 on which the LED light sources 7 are mounted. 【0179】 Although embodiments of the present invention have been described above with reference to the attached drawings, the technical scope of the present invention is not limited to the embodiments described above. It is clear to those skilled in the art that various modifications or alterations can be conceived within the scope of the technical idea described in the claims, and these will naturally also fall within the technical scope of the present invention. [Explanation of symbols] 【0180】 1, 1a, 1b, 1c, 1d……Lighting device 3… Front cover member 5……Light reflecting plate 7……LED light source 9………Circuit board 11… Wireless communication equipment antenna 13… Electromagnetic wave absorbing material 15…Rear cover component 17, 17a, 17b... Antenna mounting section 19... Bracket 21... Nut 23… Antenna support member 24... Antenna support plate 25……Spherical part 27... Wing nut 29……Protrusion 31………Indentation 32……Support shaft 33…Angle fixing screw 34... Antenna support plate 35… Antenna support member 37…Angle fixing screw 39... Rotating member 41……Support shaft 43... Slit 45... Support arm 47... Support arm 49…Angle fixing screw 51…Angle fixing screw 53……Support shaft 54… Antenna support plate 55… Antenna support member

Claims

[Claim 1] A front cover member formed of at least a light-transmitting material, Circuit board and A light reflector positioned in front of the circuit board, A group of LED light sources is arranged on a circuit board in front of the light reflector such that the light-emitting surfaces of multiple LED light sources are arranged regularly, The antenna of the wireless communication device, which is positioned behind the light reflector, An electromagnetic wave absorbing member positioned behind the antenna of the wireless communication device, Rear cover member and A lighting device comprising, The shape of the light reflector, when viewed from a side view in a direction perpendicular to the surface of the light reflector, is such that at least a portion of either both ends or the central part in the longitudinal direction of the light reflector has a shape that protrudes forward, or is formed in a substantially straight line. In order that the light-emitting surfaces of the LED light source group do not obstruct the radiating surface of the antenna of the wireless communication device, the LED light source group and the antenna of the wireless communication device are arranged in the longitudinal direction of the light reflector such that one of them is located at both ends of the light reflector and the other is located at the center of the light reflector. Furthermore, the lighting device incorporating a wireless communication device is characterized in that the front cover member, the light-emitting surface of the LED light source, and the portion of the light reflector that covers the antenna of the wireless communication device are arranged at a predetermined distance apart, and the antenna of the wireless communication device is positioned behind the forward-projecting portion or substantially straight portion of the light reflector. [Claim 2] The aforementioned light reflector is a microfoamed resin sheet made of either PET resin or PC resin, and the microfoamed resin sheet has a diffuse reflectance of 95% or more and a relative permittivity of 1.8 or less, when the diffuse reflectance with respect to a barium sulfate standard plate in the visible light band with a wavelength of 450 to 650 nm is taken as 100%. This is a lighting device incorporating a wireless communication device as described in claim 1. [Claim 3] The lighting device incorporating a wireless communication device according to claim 1, characterized in that the LED light source group is arranged on the flat light reflector in a grid, staggered, or array pattern, or in a predetermined regular arrangement pattern other than a grid, staggered, or array pattern. [Claim 4] The light reflector is made of a micro-foamed resin sheet molded body in which numerous cup-shaped recesses are formed in a predetermined arrangement pattern. A lighting device incorporating a wireless communication device according to claim 3, characterized in that individual LED light sources are arranged at the bottom of each of the recesses so as to be surrounded by the recesses. [Claim 5] With respect to the longitudinal direction of the light reflector, the antenna of the wireless communication device is positioned in the center of the light reflector, and the group of LED light sources is positioned on both sides of the antenna of the wireless communication device so as to sandwich it. A lighting device incorporating a wireless communication device according to claim 3 or 4, characterized in that at least the central portion of the light reflector corresponding to the front of the antenna of the wireless communication device is formed to protrude forward in a predetermined shape in order to secure a movable area for giving the antenna of the wireless communication device an inclination angle, and the shape of at least one of the forward-protruding portions in the longitudinal or transverse direction of the light reflector is formed to be a convex shape including a substantially trapezoidal shape, a triangular shape, or a convex curve including a circular arc with a large radius of curvature. [Claim 6] With respect to the longitudinal direction of the light reflector, the group of LED light sources is positioned in the center of the light reflector, and the antennas of the wireless communication device are positioned on both sides of the group of LED light sources so as to sandwich them. The lighting device incorporating a wireless communication device according to claim 3 or 4, characterized in that both longitudinal ends of the light reflector are formed to protrude forward in a predetermined shape from the central part of the light reflector toward both longitudinal ends covering the antenna of the wireless communication device in order to secure a movable area for providing an inclination angle for the antenna of the wireless communication device, and the antenna of the wireless communication device is positioned behind the forward-protruding portion of the light reflector. [Claim 7] With respect to the longitudinal direction of the light reflector, the antenna of the wireless communication device is positioned in the center of the light reflector, and the group of LED light sources is positioned on both sides of the antenna of the wireless communication device so as to sandwich it. The lighting device incorporating a wireless communication device according to claim 5, characterized in that the antenna of the wireless communication device is tilted relative to the LED light source group such that the center line of the main beam of the radio waves emitted from the antenna of the wireless communication device is offset by a predetermined angle with respect to the center line of the irradiation direction of the LED light source group. [Claim 8] With respect to the longitudinal direction of the light reflector, the group of LED light sources is positioned in the center of the light reflector, and the antennas of the wireless communication device are positioned on both sides of the group of LED light sources so as to sandwich them. The lighting device incorporating a wireless communication device according to claim 6, characterized in that the antenna of the wireless communication device is tilted relative to the LED light source group such that the center line of the main beam of the radio waves emitted from the antenna of the wireless communication device is shifted by a predetermined angle with respect to the center line of the irradiation direction of the LED light source group. [Claim 9] The front cover member is formed from a light-transmitting resin or glass, and if formed from a light-transmitting resin, it is a transparent resin such as PC resin, ABS resin, PET resin, vinyl chloride resin, PMMA resin, acrylic resin, or polystyrene resin, or a translucent resin obtained by adding a pigment to a transparent resin, or a resin having a translucent structure on its surface, and if formed from glass, it is transparent silica glass or translucent glass, characterized in that the lighting device incorporating a wireless communication device according to claim 1. [Claim 10] The lighting device incorporating a wireless communication device according to claim 9, wherein the front cover member has a geometric uneven structure on either the inner or outer surface of the light-transmitting resin or the glass, and repeated mutual diffuse reflection between the geometric uneven structure and the light reflector makes the extracted light indirect light, or makes the light indirect by randomizing the direction of light extraction. [Claim 11] The lighting device incorporating a wireless communication device according to claim 1, characterized in that the material forming the rear cover member is made of resin or metal, and further, the electromagnetic wave absorbing member formed of an electromagnetic wave absorber is arranged inside the rear cover member, and the electromagnetic wave absorbing member is made of a resistive material radio wave absorber, a dielectric material radio wave absorber, a magnetic material radio wave absorber, a combination thereof, or a plurality of layers of these radio wave absorbers. [Claim 12] A lighting device incorporating the wireless communication device described in claim 1, characterized in that the increase in radio wave attenuation due to radio wave absorption by air in the 70-100 GHz wavelength band, when passing through a light reflector made of a micro-foamed resin sheet of PET resin or PC resin, at an inclination angle of 0° with respect to the light reflector, is within the range of 0.15 dB or less. [Claim 13] A lighting device incorporating a wireless communication device according to Claim 1, wherein the light reflector made of a microfoamed resin sheet is either a PET resin foam or a PC resin foam, and when the inclination angle of the light reflector with respect to the antenna surface of the antenna disposed behind the light reflector is in the range of 0° to 45°, the increase in the radio wave attenuation when passing through the light reflector compared to the radio wave attenuation when passing through the air layer in the wavelength band of 22 to 33 GHz satisfies 0.10 dB or less, or when the range is 0° to 60°, the similar increase in radio wave attenuation satisfies 0.15 dB or less. [Claim 14] A lighting device incorporating a wireless communication device according to Claim 1, characterized in that the light reflector made of a microfoamed resin sheet is either a PET resin foam or a PC resin foam, and when the inclination angle of the light reflector with respect to the antenna surface of an antenna positioned behind the light reflector is in the range of 0° to 45°, the increase in the radio wave attenuation when passing through the light reflector compared to the radio wave attenuation when passing through the air layer in the wavelength band of 70 to 100 GHz satisfies 0.20 dB or less, or when the range is 0° to 60°, the similar increase in radio wave attenuation satisfies 0.50 dB or less. [Claim 15] A method for adjusting the angle of the antenna of a wireless communication device in a lighting device incorporating the wireless communication device described in claim 7, The LED light source group is arranged on both ends of the antenna of the wireless communication device. A method for adjusting the angle of an antenna of a lighting device incorporating a wireless communication device, characterized in that the centerlines of the light rays emitted from the LED light source group intersect at a predetermined height at a predetermined position in the space below the lighting device, and the angle of the antenna of the wireless communication device is adjusted so that the centerline of the main beam of the antenna of the wireless communication device passes through the position where the centerlines of the LED light source group intersect, or at a position offset by a predetermined distance, and the angle of the antenna of the wireless communication device is adjusted by adjusting the angle adjustment mechanism to a predetermined angle. [Claim 16] A method for adjusting the angle of the antenna of a wireless communication device in a lighting device incorporating the wireless communication device described in claim 8, The antenna of the wireless communication device is positioned on both ends of the LED light source group. A method for adjusting the angle of an antenna in a lighting device incorporating a wireless communication device, characterized in that the center line of the main beam of the irradiation space of the radio waves emitted from the antenna of the wireless communication device intersects at a predetermined position at a predetermined height in the space below the lighting device, and the center line of the LED light source group passes through the position where the main beam of the antenna of the wireless communication device intersects, or passes through a position offset by a predetermined distance, by adjusting the angle adjustment mechanism, thereby adjusting the angle of the antenna of the wireless communication device. [Claim 17] A method for installing a lighting device incorporating a wireless communication device as described in claim 7, When the antenna of the wireless communication device is positioned behind the central part of the light reflector in the longitudinal direction of the light reflector, and the group of LED light sources are positioned on the light reflector on both sides of the antenna of the wireless communication device so as to sandwich the antenna of the wireless communication device, A method for installing a lighting device incorporating a wireless communication device, characterized in that the radiating surface of the antenna of the wireless communication device is positioned to coincide with the direction of the arrangement plane of the LED light source group, or the angle can be adjusted so that it is positioned at a predetermined angle. [Claim 18] A method for installing a lighting device incorporating a wireless communication device as described in claim 8, When the group of LED light sources is arranged on the central part of the light reflector with respect to the longitudinal direction of the light reflector, and the antenna of the wireless communication device is arranged behind the light reflectors on both sides of the group of LED light sources so as to sandwich them, A method for installing a lighting device incorporating a wireless communication device, characterized in that the radiating surface of the antenna of the wireless communication device is positioned to coincide with the direction of the arrangement plane of the LED light source group, or the angle can be adjusted so that it is positioned at a predetermined angle. [Claim 19] A micro-foamed resin sheet made of PET resin or PC resin is used as a light reflector, and the increase in radio wave attenuation when passing through the light reflector relative to the radio wave attenuation when passing through the air layer is within the range of 0.10 dB or less, within a wide range of tilt angles of 0 to 45° for the light reflector in the wavelength band of 22 to 33 GHz. [Claim 20] A light reflector made of a micro-foamed resin sheet made of PET resin or PC resin is used as the light reflector, and the increase in radio wave attenuation when passing through the light reflector relative to the radio wave attenuation when passing through the air layer is within the range of 0.15 dB or less, within a wide range of tilt angles of 0 to 60° for the light reflector in the wavelength band of 22 to 33 GHz. [Claim 21] An optical reflector made of a micro-foamed resin sheet made of PET resin or PC resin is used as the optical reflector, and the increase in radio wave attenuation when passing through the optical reflector relative to the radio wave attenuation when passing through the air layer is within the range of 0.20 dB or less, within a wide range of tilt angles of 0 to 45° for the optical reflector in the wavelength band of 70 to 100 GHz. [Claim 22] An optical reflector made of a micro-foamed resin sheet made of PET resin or PC resin is used as the optical reflector, and the increase in radio wave attenuation when passing through the optical reflector relative to the radio wave attenuation when passing through the air layer is within the range of 0.50 dB or less, within a wide range of tilt angles of 0 to 60° for the optical reflector in the wavelength band of 70 to 100 GHz.