JP6434816B2 - ANTENNA DEVICE, RECEPTION DEVICE, AND REFLECTOR ANTENNA DEVICE - Google Patents

Description

  The present invention relates to a planar antenna device having a structure capable of transmitting and receiving both right-handed and left-handed circularly polarized waves, a receiving device provided with the antenna device, and a reflector antenna device using the antenna device as a feed element.

  Conventionally, a planar antenna device that can transmit and receive circularly polarized waves is known (see, for example, Non-Patent Document 1).

  In the technique of Non-Patent Document 1, a plurality of C-shaped slots are provided on one conductor flat plate of two circular conductor flat plates provided side by side, and each C-shaped slot is a circular conductor. A first slot and a second slot are formed at an angle of 45 ° in different directions from the side closer to the center of the conductive plate with respect to the radial direction of the flat plate, whereby the second slot is 90 ° with respect to the first slot. The arrangement is shifted in the radial direction so as to have a phase difference of °.

  Then, when a current flows in the radial direction of the conductor flat plate, each C-shaped slot can radiate radio waves that are spatially and temporally orthogonal, and the combined wave becomes a circularly polarized wave in one turning direction. A planar array is configured by regarding one C-shaped slot as one radiating element and arranging a plurality of radiating elements in phase with each other, thereby enabling transmission and reception of circularly polarized waves in one turning direction. A planar antenna device is configured.

  For example, when it is necessary to attach both a solar battery and an antenna device as in an artificial satellite, a technique of providing a solar battery cell in the antenna device is known.

  For example, an antenna device (see, for example, Non-Patent Document 2) in which a solar cell module having a circularly polarized cross slot is formed in order to enable power generation by a solar cell and radio wave radiation by the antenna device, or a square shape. An antenna formed by affixing solar cells on the antenna surface excluding the effective radio wave radiation area along the outer peripheral edge of the microstrip patch and on a dielectric substrate located at a slight distance from the edge of the microstrip patch An apparatus (see, for example, Patent Document 1) is disclosed.

  In the present specification, a solar cell element itself that is a basic unit of a solar cell is referred to as a “solar cell”, and a predetermined number of solar cells arranged and packaged is referred to as a “solar cell module”. A battery module in which a predetermined number of battery modules are arranged and connected is referred to as a “solar battery array”, and when these are collectively described without distinction, they are simply referred to as “solar batteries”.

  Incidentally, in recent years, in order to transmit a large amount of information in applications such as communication / broadcasting, it is required that one antenna device share right-handed and left-handed polarized waves.

JP-A-7-15230

Goto, Yamamoto, “Circularly Polarized Slot Antenna Using Radial Lines”, IEICE Technical Report, AP80-57, pp.43-48, Aug. 1980 S. Vaccaro, J.R.Mosig and P. de Maagt, “Two Advanced Solar Antenna“ SOLANT ”Designs for Satellite and Terrestrial Communications”, IEEE TRANSACTIONS ON ANTENNAS AND PROPAGATION, VOL. 51, NO. 8, AUGUST 2003

  As described above, in recent years, in order to transmit a large amount of information in applications such as communication / broadcasting, it is required that one antenna device share right-handed and left-handed polarized waves.

  In addition, when applying a circularly polarized antenna device to a receiving device such as communication / broadcasting, the power generated by the solar cell can be used even during a power outage due to an emergency disaster, etc. A technique that enables continuous use of the service is desired.

  However, in the technique according to Non-Patent Document 1 of the prior art, since a planar array is configured by arranging a plurality of C-shaped slots so as to be in phase, it is possible to generate circularly polarized waves. Rotation and left-hand circular polarization cannot be shared.

  Also in the technique according to Non-Patent Document 2 of the prior art, a cross-slot provided in a solar cell module is fed by a microstrip line to form a planar array, and it is possible to generate circularly polarized waves. However, it is not possible to share right-handed and left-handed circularly polarized waves.

  Further, the technique according to Patent Document 1 of the prior art exemplifies a form capable of generating circularly polarized waves. However, when one antenna device is configured by arranging in an array, a right-handed rotation and a left-handed rotation are provided. There is no disclosure of a device that can share polarization.

  Therefore, it is difficult to construct a planar antenna device having a structure capable of transmitting and receiving both right-handed and left-handed circularly polarized waves according to the prior art.

  In particular, in the technique according to Patent Document 1, since a square microstrip patch is configured, it is necessary to remove an effective radio wave radiation area along the outer peripheral edge of the microstrip patch on the dielectric substrate when arranging the solar cells. There is. For this reason, compared with the antenna device of the slot structure of a nonpatent literature 1, 2, for example, the area which arrange | positions a solar cell becomes small, and the subject which should be improved regarding the electric power generation efficiency when arranging in an array form arises.

  In addition, in the techniques according to Patent Document 1 and Non-Patent Document 2 of the prior art, it is disclosed that an antenna device that enables power generation by a solar cell and radio wave radiation by circular polarization is configured. Thus, it is made in view of the necessity to attach both a solar cell and an antenna device. However, even in the event of a power failure due to an emergency disaster or the like, a receiving device can be configured by applying a circularly polarized antenna device so that the power generated by the solar cell can be used, or the power feeding element of the reflector antenna device can be There is no suggestion about applying the planar antenna device of polarization.

  In view of the above problems, an object of the present invention is to provide a planar antenna device having a structure capable of transmitting and receiving both right-handed and left-handed circularly polarized waves, a receiving device provided with the antenna device, and feeding the antenna device. An object of the present invention is to provide a reflector antenna device as an element.

  In the present invention, a single element cross-slot antenna having a structure capable of transmitting and receiving both right-handed and left-handed circularly polarized waves is formed in one antenna device, and is preferably arranged in an array efficiently. In the present invention, the arrangement of single-slot cross-slot antennas for right-handed circularly polarized waves and left-handed circularly polarized waves has a regular structure with rotational symmetry of 90 degrees. As a result, an antenna device capable of generating good circular polarization in a wide band is obtained.

  Further, the solar cells are arranged efficiently between the plurality of single-element cross-slot antennas so as not to block the single-element cross-slot antennas. Thus, a solar cell module or a solar cell array is configured, and an antenna device having a function capable of generating power efficiently is obtained.

  In addition, the receiving device of the present invention includes the antenna device according to the present invention, and has a function of feeding power to a receiver, a communication device, or the like attached using power generated by a solar battery. Thereby, even in the event of a power failure due to an emergency disaster or the like, the receiving device can use the power generated by the solar battery.

  Moreover, the reflector antenna device of the present invention comprises the antenna device according to the present invention as a feeding element for the reflector. Thereby, a reflector antenna device can be constituted.

  That is, the reflector antenna device of the present invention is a planar antenna device having a structure capable of transmitting and receiving both right-handed and left-handed circularly polarized waves, and has a conductor plate formed with a cross slot on one side, A dielectric substrate provided with a pair of microstrip lines facing each other on the other surface side, and comprising a single-element cross-slot antenna in which a cavity is installed on the dielectric substrate in a range surrounding the cross-slot, Each of the pair of microstrip lines has a hybrid circuit that connects two power supply portions that supply power to the cross slot at two locations and two ports, and the power is supplied from either one of the two ports. It is characterized in that a phase difference of 90 degrees is generated as each feeding phase of the two feeding units.

  In the reflector antenna device of the present invention, a plurality of the single-element cross-slot antennas are regularly arranged so that the directions of the pair of microstrip lines are alternately orthogonal, and adjacent single-element cross-slot antennas are arranged. One of the two ports of the opposing microstrip line in FIG. 1 is connected by a phase difference feeding circuit, so that a phase difference of 90 degrees is obtained as a feeding phase.

  In the reflector antenna device of the present invention, the single-element cross slot antennas are regularly arranged in a rotational symmetry of 90 degrees vertically and horizontally, and the feeding phase at the feeding port for the phase difference feeding circuit is the same polarization. The phase difference between the feeding ports of the adjacent single-slot cross slot antennas is 180 degrees, and the structure is configured to alternately repeat 0 degrees and 180 degrees.

  In the reflector antenna device of the present invention, a solar battery cell is provided on the conductor plate between the cross slots of the plurality of single-element cross slot antennas arranged.

  Further, the receiving device of the present invention is configured to be able to feed the power generated by the antenna device of the present invention and the solar battery cell, and the right-handed or left-handed or the right-handed and left-handed obtained through the antenna device. And a receiver that generates a digital signal by receiving a radio frequency signal transmitted in a circularly polarized wave.

  Further, the receiving device of the present invention is characterized by further comprising a communication device configured to be able to supply power generated by the solar battery cell and capable of communicating the digital signal via a predetermined communication network.

  In the receiving device of the present invention, the communication device may be configured to detect a missing portion related to a digital signal generated by receiving the other receiving device installed at another point connected to the predetermined communication network. It has a function of making a request, and a function of receiving digital data related to the missing portion from the other receiving device that made the request, and complementing the received digital signal.

  Furthermore, the reflecting mirror antenna device of the present invention is characterized in that the antenna device of the present invention is configured as a feeding element of the reflecting mirror.

  According to the present invention, a planar antenna device having a structure capable of transmitting and receiving both right-handed and left-handed circularly polarized waves can be configured, and good circularly polarized waves can be generated in a wide band. Moreover, according to the present invention, an antenna device having a function capable of generating power efficiently can be configured.

  Furthermore, according to the receiving device of the present invention, even when a power failure occurs due to an emergency disaster, etc., using the power generated by the solar cell provided, the receiver or communication device for communication or broadcasting is powered and the service is continued. Can be used. In addition, when a plurality of receiving devices of the present invention are installed at a remote location, for example, due to rain attenuation, etc., satellite broadcasting cannot be received, a request for a defective portion is sent to another receiving device installed at another point. To obtain the missing part.

  Furthermore, according to the reflector antenna device of the present invention, a feed element can be configured with the antenna device of the present invention.

(A), (B) is a perspective view which shows schematic structure at the time of seeing from the front and the back about the single element cross slot antenna in the antenna apparatus of one Embodiment by this invention, respectively. It is side surface sectional drawing of the single element cross slot antenna in the antenna apparatus of one Embodiment by this invention. It is a top view which shows the electric power feeding structure of the single element cross slot antenna in the antenna device of one Embodiment by this invention. (A) and (B) are each an antenna device according to an embodiment of the present invention, in which single-element cross slot antennas are arranged in the number of 8 × 8 in length and width, and are schematically viewed from the front and back. It is a top view which shows a structure. It is the elements on larger scale which show the phase difference electric power feeding circuit which feeds to one of a pair of microstrip line | wires of the cross slot antenna of four adjacent single elements in the antenna apparatus of one Embodiment by this invention. BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a plan view showing a schematic configuration when a single element cross-slot antenna is arranged in a number of 3 × 3 in length and width as an antenna device according to an embodiment of the present invention when viewed from the back side. (A) and (B) are each configured as an antenna device according to an embodiment of the present invention in which single-element cross-slot antennas are arranged in a number of 3 × 3 in length and width, and when power is supplied through different power supply ports, It is a characteristic view which shows the radiation pattern (antenna pattern) at the time of right-handed circular polarization and left-handed circular polarization. It is explanatory drawing at the time of installing the structure of the receiver of one Embodiment by this invention, and this receiver. It is a perspective view showing a schematic structure of a reflector antenna device of one embodiment by the present invention.

  Hereinafter, an antenna device, a receiving device, and a reflector antenna device according to an embodiment of the present invention will be described with reference to the drawings.

[Antenna device]
As will be described in detail with reference to FIGS. 1 to 7, an antenna device 10 according to an embodiment of the present invention is a single-element cross slot antenna 1 having a structure capable of transmitting and receiving both right-handed and left-handed circularly polarized waves. It is comprised so that it may comprise. The antenna device 10 according to an embodiment of the present invention can be configured by arranging a plurality of single-element cross-slot antennas 1, and solar cells 7 are formed on the surface of the conductor plate 2 of the single-element cross-slot antenna 1. Is provided.

  First, the structure of a basic single-element cross slot antenna 1 will be described with reference to FIGS. 1 and 2. 1A and 1B are perspective views showing a schematic configuration of a single-element cross slot antenna 1 in an antenna device 10 according to an embodiment of the present invention when viewed from the front and the back, respectively. FIG. 2 is a side sectional view of the single-element cross slot antenna 1.

  As shown in FIGS. 1 and 2, the single-slot cross-slot antenna 1 includes a front conductor plate (ground plate) 2 on which a cross slot 3 is formed, a dielectric substrate 4, and a back microstrip line 5. A layer and a cavity 6 for preventing radio wave radiation to the back side. The cross slot 3 formed on the surface of the metal conductor plate 2 is provided in a state in which two slots having a length of about ½ wavelength are rotated by 90 degrees at the center. The cavity 6 is provided on the dielectric substrate 4 on which the microstrip line 5 is formed so as to surround the cross slot 3, and the cavity 6 and the microstrip line 5 are prevented from contacting the microstrip line 5 and the cavity 6. A gap 6a is provided between the two.

  Next, with reference to FIG. 3, the structure of the power feeding part of the basic single-element cross slot antenna 1 will be described. FIG. 3 is a plan view showing a power feeding structure of the power feeding portions 5b-1, 5b-2, 5b-3, and 5b-4 of the single element cross slot antenna 1. FIG. A pair of microstrip lines 5 are formed on the dielectric substrate 4 in the single-element cross slot antenna 1 so as to face each other. The microstrip line 5 shown in the lower part of the figure includes two power feeding parts 5b-1, 5b-2, two ports 5a-1, 5a-2, these power feeding parts 5b-1, 5b-2, and a port 5a. -1 and 5a-2 are connected to each other. Similarly, the microstrip line 5 shown in the upper part of the drawing includes two power feeding portions 5b-3 and 5b-4, two ports 5a-3 and 5a-4, and these power feeding portions 5b-3 and 5b-4. And a hybrid circuit 5c connecting the ports 5a-3 and 5a-4.

  In this way, the microstrip line 5 is a line for feeding power to the two slots constituting the cross slot 3 via the power feeding ports 5a-1, 5a-2, 5a-3, 5a-4 (feeding). Parts 5b-1, 5b-2, 5b-3, 5b-4) are provided. As will be described later, the solar battery cell 7 is arranged on the front surface of the conductor plate 2 so as not to block the cross slot 3. There are many types of solar cells 7 such as silicon (single crystal, polycrystal, amorphous silicon, etc.) and compound (GaAs, etc.), all of which are in the form of a thin film of about several hundred μm. If it is arranged so as not to block, it can be used with reduced influence on electrical performance. Accordingly, any type of solar cell can be used as long as it is a thin-film solar cell, and if the cross slot 3 is arranged so as not to be blocked, the surface area on the conductor plate 2 can be effectively utilized to improve power generation efficiency. Can do.

  Further, when power is supplied from the first port (illustrated 5a-1) by the hybrid circuit 5c, for example, power is supplied to the slot (feeding unit 5b-1) of the cross slot 3 close to the first port (illustrated 5a-1). When the phase is 0 degree, power can be supplied to the slot (power supply unit 5b-2) far from the first port (illustrated 5a-1) with a phase delayed by 90 degrees. For this reason, a left-handed circularly polarized wave can be generated.

  On the other hand, when the power is supplied to the slot (power supply unit 5b-3) of the cross slot 3 close to the third port (illustrated 5a-3) by the hybrid circuit 5c at 0 degree, the third port (illustrated 5a-3) It is possible to feed power to the slot (feeding section 5b-4) far from the center with a phase delayed by 90 degrees. For this reason, right-handed circularly polarized wave can be generated.

  That is, in the pair of microstrip lines 5, the left-handed circularly polarized wave and the right-handed circularly polarized wave are generated in common by inverting the feeding phase of feeding power through each port connected to each hybrid circuit 5 c. Can do.

  In addition, if the first port (5a-1 in the figure) is set to 0 degrees and the third port (5a-3 in the figure) is supplied with the phase reversed so that it is 180 degrees, the symmetry of the radiated circular polarization is improved. The electrical characteristics such as the radiation pattern can be improved. In addition, in order to match each power feeding part 5b-1, 5b-2, 5b-3, 5b-4 with each hybrid circuit 5c, a stub 5d is provided to adjust the electrical characteristics (that is, impedance matching). Is preferred.

  Next, with reference to FIG. 4, an example in which the antenna device 10 is configured by arranging single-element cross-slot antennas in the number of 8 × 8 in the vertical and horizontal directions will be described. FIGS. 4A and 4B are schematic views of a single element cross-slot antenna 1 arranged in a number of 8 × 8 in the form of an antenna device 10 according to an embodiment of the present invention, as viewed from the front and the back. It is a top view which shows a structure.

  As shown in FIG. 4A, the front conductor plate 2 is provided with a cross slot 3, and the solar cells 7 are arranged with almost no gap so as not to block the cross slot 3. When viewed from the back, as shown in FIG. 4B, single-element cross-slot antennas 1 having the same structure are alternately rotated by 90 degrees. By arranging in this way, the single-element cross-slot antennas 1 can be arranged continuously, and there is a phase difference of 90 degrees between the four adjacent single-element cross-slot antennas 1. Thus, a phase difference feeding circuit 5e for feeding power to the feeding portion of the microstrip line 5 in the four single-element cross slot antennas 1 is provided.

  In this way, the single-slot cross-slot antenna 1 is regularly arranged with a rotational symmetry of 90 degrees in the vertical and horizontal directions so that the directions of the pair of microstrip lines 5 are alternately orthogonal to each other. The circularly polarized power supply port) and the left-handed circularly polarized port (left-handed circularly polarized power supply port) can be arranged in a line. At this time, the phase difference between the feeding ports of adjacent single-element cross-slot antennas 1 of the same polarization becomes 180 degrees by the phase-difference feeding circuit 5e, and the single-element cross-slot antenna repeats 0 degrees and 180 degrees alternately. 1 are regularly arranged. Details of the phase difference feeding circuit 5e are shown in FIG. FIG. 5 is a partially enlarged view of a phase difference feeding circuit 5e that feeds one of a pair of microstrip lines 5 of four adjacent single-element cross slot antennas 1. FIG.

  The phase difference feeding circuit 5e shown in FIG. 5 is for right-handed circularly polarized waves, and is connected to each adjacent unit from one feeding port 5g so that the phase difference is 90 degrees counterclockwise when viewed from the back side. Each of the two ports of the microstrip line 5 facing each other in the cross slot antenna 1 of the element can supply power to one of the ports 5f-1 to 5f-4. Since the left-handed circularly polarized phase difference feeding circuit 5e has a mirror image relationship with the example shown in FIG. 5, the phase difference is counterclockwise. Ports 5f-1 to 5f-4 shown in FIG. 5 are respectively connected to the four single-element cross-slot antennas 1 adjacent to each other, for ports 5a-2, 5a-4, 5a-4, and 5a-2 shown in FIG. Corresponding to

  More specifically, for example, as shown in FIG. 5, one of a pair of microstrip lines 5 of each single-element cross slot antenna 1 is adjacent in four directions, and ports 5f-1 to 5f of the adjacent microstrip lines 5 are provided. -4 is connected by the phase difference power supply circuit 5e, and power can be supplied by delaying the phase of each port 5f-1 to 5f-4 by 90 degrees from one port 5g. In the example shown in FIG. 5, the phase value between connection ports (between 5f-1, 5f-3 or 5f-2, 5f-4) arranged symmetrically with respect to the phase difference feeding circuit 5e is 180 degrees. For right-handed circularly polarized waves, a phase difference of 90 degrees is made by turning right. Each of the ports 5f-1 to 5f-4 is the same as the ports (5f-1 and 5f-3, or 5f-2 and 5f-4) arranged symmetrically to distribute power with equal amplitude. A matching line having a structure (a convex line surrounded by a broken line) is formed. It is also preferable to adjust the electrical characteristics (that is, impedance matching) by providing the stub 5d.

  In order to enhance the understanding of the present invention, FIG. 6 shows an antenna apparatus 10 configured by arranging single-element cross slot antennas 1 in the number of 3 × 3 in length and width. FIG. 6 is a plan view showing a schematic configuration when the single-element cross-slot antennas 1 are arranged in the number of 3 × 3 in the vertical and horizontal directions as the antenna device 10 of one embodiment according to the present invention, as viewed from the back. is there. In the single-slot cross-slot antenna 1 located at the end, the microstrip line 5 that does not require feeding is not formed. This is to prevent the electrical performance from being adversely affected, and the same applies to the example shown in FIG.

  In the antenna device 10 shown in FIG. 6, the right-handed circularly polarized phase difference feeding unit 5e and the left-handed circularly polarized phase difference feeding unit 5e have a mirror image relationship. Four power supply ports 5g-1 to 5g-4 are provided for each phase difference power supply unit 5e. A radiation pattern (antenna pattern) of the antenna device 10 is shown in FIG.

  FIGS. 7A and 7B show radiation patterns (antennas) of right-handed circularly polarized waves (RHC) and left-handed circularly polarized waves (LHC) when power is supplied from different feeding ports in the antenna device 10 shown in FIG. FIG. 7A and 7B, the horizontal axis indicates the azimuth angle, and the vertical axis indicates the power amplitude.

  As shown in FIG. 7A, when the first power supply port 5g-1 and the third power supply port 5g-3 shown in FIG. 6 are fed with the same amplitude so that the phase difference is 180 degrees, right-handed circular polarization As shown in FIG. 7B, when the second power feeding port 5g-2 and the fourth power feeding port 5g-4 shown in FIG. 6 are fed with the same amplitude so that the phase difference is 180 degrees, Left-handed circular polarization occurs.

  Therefore, according to the antenna device 10 of the present invention, it is possible to configure a planar antenna device having a structure capable of transmitting and receiving both right-handed and left-handed circularly polarized waves, and excellent circular polarization in a wide band. Can be generated.

  In addition, since the thin-film solar cells 7 are arranged efficiently between a plurality of single-element cross-slot antennas so as not to block the single-element cross-slot antenna, it has a function of efficiently generating power. An antenna device can be configured.

[Receiver]
Next, with reference to FIG. 8, the structure of the receiver 20 of one Embodiment by this invention is demonstrated. FIG. 8 is an explanatory diagram when a configuration of the receiving device 20 according to an embodiment of the present invention and a plurality of receiving devices 20 are installed. For convenience of explanation, reference numbers 20-1 to 20-N (N is an integer equal to or greater than 2) are used for individual receiving apparatuses 20 having the same structure.

  Each of the plurality of receiving devices 20-1 to 20-N includes an antenna device 10, a rechargeable battery 11, a receiver 12, and a communication device 13 according to the present invention.

  As shown in FIG. 4 and FIG. 6 described above, the antenna device 10 is configured to have a structure capable of transmitting and receiving both right-handed and left-handed circularly polarized waves, and solar cells 7 are provided on the surface of the antenna device 10. A predetermined number of solar cells 7 are arranged to form a solar cell module or a solar cell array. And it is comprised so that the electric power generated by this solar cell module or solar cell array can be stored in the rechargeable battery 11.

  The power stored in the rechargeable battery 11 is configured to be able to supply power to the receiver 12 and the communication device 13.

  The antenna device 10 receives a radio frequency signal (RF signal) transmitted in a right-handed or left-handed manner or a right-handed polarization and a left-handed polarized wave, and outputs the radio frequency signal (RF signal) to the receiver 12 through the power feeding port 5a.

  The receiver 12 is configured to be able to supply power from the rechargeable battery 11, and restores a digital signal transmitted by demodulating / decoding based on a predetermined coded modulation method by the demodulator and decoder provided therein, Output.

  The communication device 13 is configured to be able to supply power from the rechargeable battery 11, and is wired with a function of outputting a digital signal to, for example, an indoor receiver and a predetermined communication format (for example, TCP / IP (Transmission Control Protocol / Internet Protocol) format). Or it connects with a communication network (for example, the internet etc.) by radio | wireless, For example, it has a communication function with the other receiver 20 installed in a remote place.

  The communication between the communication device 13 and the receiver may be configured to communicate with, for example, the above-mentioned TCP / IP format packet, or configured to communicate with dedicated communication using a USB (Universal Serial Bus) or the like. Also good.

  And such a receiver 20 can also be comprised by comprising the antenna device 10 in portable terminals, such as a smart phone. In other words, it can be used for charging a mobile terminal such as a smartphone via the antenna device 10 and can transmit a digital signal received via a communication network. As a result, even when a power failure occurs due to an emergency disaster or the like, it is possible to operate using the power generated by the solar battery provided on the surface of the antenna device 10, and for example, it is possible to acquire and transmit information by satellite broadcasting. Become.

  In addition, the communication function of the communication device 13 with the other receiving device 20 includes a function of requesting another receiving device 20 installed at another point for a missing portion related to the received digital signal, and the request target. The receiving apparatus 20 has a function of receiving digital data related to the missing portion and complementing the missing digital signal. And the communication function with the other receiver 20 in the communication apparatus 13 receives the request regarding the said defect | deletion part from another receiver 20 installed in the other point, and searches whether it is accumulate | stored and hold | maintained. If it is determined and stored and held, the digital data related to the missing portion is returned as a response to the request, and if not stored and held, the digital data related to the missing portion is returned as a response to the request. It has a function. The digital signal according to this example can be configured in any signal format that can be communicated. For example, the digital signal is divided into TS packets of a predetermined size on MPEG-2 TS (Motion Pictures Expert Group 2 Transport Stream). The TS packet can be stored in the IP packet when communicating with a predetermined communication network. The TS packet includes a TS header and a main body for storing video data / audio data of content. In the TS header, reference time information that is used to identify the number of the packet from the beginning (start of content) in the timeline and to synchronously reproduce the data of the main part of each TS packet is included. include. For this reason, the deficient portion can be specified by forming a request (or response) regarding the deficient portion based on the description of the TS header.

  Thus, for example, when the receiving device 20 is configured to receive an RF signal from a communication or broadcast satellite, the RF signal from the satellite cannot be received due to the influence of rain attenuation or the like, and the digital signal has a missing portion. In the case of restoration by the above, a request for the missing portion is made to another receiving device 20 installed at another point, and another antenna device 20 installed at this other point receives the same digital signal. If accumulated, digital data related to the missing portion can be acquired from the receiving device 20 that is the request target and complemented.

[Reflector antenna device]
Next, referring to FIG. 9, a reflector antenna device 30 according to an embodiment of the present invention will be described. FIG. 9 is a perspective view showing a schematic configuration of the reflector antenna device 30 according to the embodiment of the present invention. The reflector antenna device 30 includes the antenna device 10 according to the present invention and the reflector 15. The reflecting mirror 15 is configured to receive a radio wave from, for example, a communication or broadcast satellite and feed and radiate the antenna device 10, and the antenna device 10 is configured as a feeding element thereof. This power feeding element can be provided with functional units such as an amplifier and a communication interface.

  The present invention has been described above by taking examples of specific embodiments. However, the present invention is not limited to the above-described embodiments, and various modifications can be made without departing from the technical idea thereof. For example, in the above-described example, an example in which a specific number of single-slot cross-slot antennas 1 are arrayed vertically and horizontally has been described. However, the antenna device 10 is configured by only one single-slot cross-slot antenna 1. Alternatively, the number may be appropriately determined depending on the application, and the structure may be arranged in a single-row array. Moreover, although the example which comprises the antenna apparatus 10 by substantially square shape was demonstrated, other shapes, such as circular, may be sufficient.

  According to the present invention, it is possible to configure a planar antenna device having a structure capable of transmitting and receiving both right-handed and left-handed circularly polarized waves, which is useful for applications that transmit or receive both right-handed and left-handed circularly polarized waves. It is.

1 Single element cross slot antenna 2 Conductor plate (ground plate)
3 Cross Slot 4 Dielectric Substrate 5 Microstrip Line 5a-1, 5a-2, 5a-3, 5a-4 Port 5b-1, 5b-2, 5b-3, 5b-4 Feed Portion 5c Hybrid Circuit 5d Stub 5e Phase difference feeding circuit 5f-1, 5f-2, 5f-3, 5f-4 Port 5g, 5g-1, 5g-2, 5g-3, 5g-4 Feeding port 6 Cavity 6a Air gap 10 Antenna device 11 Rechargeable battery 12 Receiver 13 Communication device 15 Reflector 20, 20-1, 20-1, 20-N Receiver

Claims (8)

A planar antenna device having a structure capable of transmitting and receiving both right-handed and left-handed circularly polarized waves,
A conductor plate having a cross slot is provided on one side, a dielectric substrate provided with a pair of microstrip lines facing each other is provided on the other side, and a cavity is formed on the dielectric substrate so as to surround the cross slot. Equipped with a single-element cross-slot antenna with
Each of the pair of microstrip lines has a hybrid circuit that connects two power supply portions that supply power to the cross slot at two locations and two ports, and power is supplied from one of the two ports. An antenna device characterized in that a phase difference of 90 degrees is generated as each feeding phase of the two feeding units.   A plurality of the single-element cross-slot antennas are regularly arranged so that the directions of the pair of micro-strip lines are alternately orthogonal to each other. The antenna device according to claim 1, wherein one of the ports is connected by a phase difference feeding circuit so that a phase difference of 90 degrees is provided as a feeding phase.   A plurality of the single-element cross-slot antennas are regularly arranged in a rotational symmetry of 90 degrees vertically and horizontally, and the feeding phases at the feeding ports with respect to the phase difference feeding circuit are the feedings of adjacent single-element cross-slot antennas having the same polarization. The antenna device according to claim 2, wherein the phase difference between the ports is 180 degrees and is configured to alternately repeat 0 degrees and 180 degrees.   4. The antenna device according to claim 3, wherein solar cells are provided on the conductor plate between the cross slots of the plurality of single-element cross-slot antennas arranged in a plurality. An antenna device according to claim 4,
The power generated by the solar cell is configured to be able to be fed, and the radio frequency signal transmitted through the antenna device is transmitted in a right-handed or left-handed manner or a right-handed and left-handed circularly polarized wave and digitally received. A receiver for generating a signal;
A receiving apparatus comprising:   The receiving device according to claim 5, further comprising a communication device configured to be able to supply power generated by the solar battery cell and capable of communicating the digital signal via a predetermined communication network.   The communication device has a function of requesting a missing portion related to the received and generated digital signal to another receiving device installed at another point connected to the predetermined communication network, and the requested another The receiving apparatus according to claim 6, wherein the receiving apparatus has a function of receiving digital data related to the missing portion from the receiving apparatus and complementing the received digital signal.   A reflector antenna device comprising the antenna device according to claim 1 as a feeding element of a reflector.