JP2020068430A - Antenna unit and communication device - Google Patents

Abstract

To provide an antenna unit and a communication device capable of obtaining sufficient reception sensitivity even when antenna elements for transmission and reception are disposed close to each other.SOLUTION: An antenna unit 1 includes: a transmission AESA 12 in which a plurality of transmission excitation patch antenna elements 121 are disposed; and a reception AESA 13 in which a plurality of reception excitation patch antenna elements 131 are disposed. A boresight direction, which is a beam orientation direction at the time of no scanning without a phase difference, of the plurality of transmission excitation patch antenna elements 121 and a boresight direction, which is a beam orientation direction at the time of no scanning without a phase difference, of the plurality of reception excitation patch antenna elements 131 are inclined in directions spaced apart from each other.SELECTED DRAWING: Figure 1

Description

  The present invention relates to an antenna unit and a communication device for transmitting and receiving wireless communication signals with an active electronic scanning array antenna.

  In a satellite communication system, an active electronic scanning array antenna that arranges a large number of antenna elements and adjusts an amplifier and a phase shifter provided for each antenna element to perform beam pointing control and spatially combine power ( A configuration using an Active Electronically Scanned Array Antenna (hereinafter referred to as AESA) is known.

  In a satellite communication system using AESA, it is general to perform communication by frequency division duplex (FDD) using a pair band frequency, and transmission and reception are performed at the same time.

  AESA is known to have a configuration in which a large number of antenna elements are arranged on a plane (for example, Non-Patent Document 1). Non-Patent Document 1 describes an example in which AESAs are arranged in concentric circles. In this case, since the transmission AESA and the reception AESA are arranged adjacent to each other, there is a problem in that the high-power transmission wave output by the transmission AESA interferes with the reception AESA and the reception gain is reduced. There is also a problem that the sensitivity of the receiver is lowered due to noise in the reception frequency band radiated from the transmission AESA.

  To solve this problem, in the conventional AESA for satellite communication, the transmitting side has a module configuration of only a phase shifter to make it passive, and a filter with a large amount of suppression for removing reception band noise is provided at the output of the high output amplifier. , There was a device to reduce the noise in the reception band. Further, by providing a band elimination filter for eliminating a transmission wave in the input section on the reception side or by separating a distance between the transmission AESA and the reception AESA, generation of reception band noise due to the transmission wave is reduced. There was also.

  In addition, there is also an antenna that improves the isolation between transmission and reception by providing a periodic structure in the antenna element of AESA or by making the directions of the excitation slots orthogonal to each other (for example, described in Patent Document 1).

  In the microstrip antenna described in Patent Document 1, the receiving antenna includes a parasitic element and an excitation element, the excitation element is composed of a plurality of metal pieces, and adjacent portions of each metal piece have a meandering constant width. Separated by a gap. It is described that by using such an excitation element, the coupling between transmission and reception can be reduced, and an antenna having a small size and a simple structure can be realized.

JP, 2011-71954, A

The Institute of Electronics, Information and Communication Engineers "Antenna Engineering Handbook (2nd Edition)" Ohmsha Co., Ltd. July 2008 P420

  In the case of satellite communication, the difference in power level between transmission and reception is large, and the received signal level is extremely low, so high noise performance is required for the receiver. The required isolation amount between the transmitting and receiving antennas is several tens of dB to 100 dB.

  However, in the method of expanding the amount of isolation between transmission and reception including the method described in Patent Document 1, it is not possible to secure the amount of isolation required in the satellite communication system, and the noise performance of the receiving side is reduced. The shortage was an obstacle to the practical application of the satellite system.

  The present invention has been made in view of the above circumstances, and an antenna unit that can obtain sufficient reception sensitivity even when antenna elements for transmission and reception are arranged close to each other. And to provide a communication device.

  In order to achieve the above object, an antenna unit of the present invention comprises a transmission active electronic scanning antenna including a plurality of transmission excitation patch antenna elements, and a reception active electronic scanning antenna including a plurality of reception excitation patch antenna elements. , A beam sighting direction of a plurality of transmitting excitation patch antenna elements that does not have a phase difference and is a non-scanning beam pointing direction, and a plurality of receiving excitation patch antenna elements that have a phase difference of no scanning and a beam pointing direction. It is characterized in that the boresight direction and the direction away from each other are inclined.

  According to the present invention, the directional gain of the transmitting active electronic scanning antenna is reduced in the direction of the receiving active electronic scanning antenna, so that the transmitting and receiving antenna elements are arranged close to each other. However, it is possible to obtain sufficient reception sensitivity.

Outline drawing of an antenna unit equipped with AESA according to Embodiment 1 of the present invention Outline drawing of an antenna unit equipped with AESA according to Embodiment 1 of the present invention Outline drawing of an antenna unit equipped with AESA according to Embodiment 1 of the present invention Schematic diagram for explaining reception band noise due to transmitter output Schematic diagram showing the correlation between the radiation pattern of the antenna element and the radiation pattern of AESA Schematic diagram for explaining the decrease in the coupling between the transmitting AESA and the receiving AESA External view of an antenna unit including an AESA according to Embodiment 2 of the present invention

Embodiment 1.
Hereinafter, embodiments for carrying out the present invention will be described in detail with reference to the drawings.

  1 to 3 are outline diagrams of an antenna unit 1 including an active electronically scanned array antenna (hereinafter, referred to as AESA) according to the present embodiment. A communication device including the antenna unit 1 transmits and receives radio signals to and from an artificial satellite in a satellite communication system, for example.

  As shown in FIGS. 1 to 3, the antenna unit 1 includes a platform 11 on which an AESA is mounted, a transmission AESA 12 that is an AESA for transmission, and a reception AESA 13 that is an AESA for reception. Here, the transmission frequency of the transmission wave transmitted by the transmission AESA 12 and the reception frequency of the reception wave received by the reception AESA 13 are different. That is, the communication device including the antenna unit 1 is used in the frequency division multiplexing system.

  The transmission AESA 12 includes a plurality of transmission excitation patch antenna elements 121 and a power supply line 122 that supplies power to each transmission excitation patch antenna element 121. The reception AESA 13 has a plurality of reception excitation patch antenna elements 131 and a power supply line 132 that supplies electric power to each reception excitation patch antenna element 131. The transmission AESA 12 and the reception AESA 13 are mounted adjacent to each other on the platform 11.

  In the transmission AESA 12, the plurality of transmission excitation patch antenna elements 121 are arranged in a plane in a periodic structure including a triangular arrangement and a square arrangement. Similarly, the plurality of receiving excitation patch antenna elements 131 are surface-arranged in the receiving AESA 13 in a periodic structure including a triangular arrangement and a square arrangement. More specifically, when viewed from the Z direction perpendicular to the XY plane with the extending direction of the platform 11 as the X direction and the Y direction in FIGS. 1 to 3, the transmit excitation patch antenna element 121 and the reception excitation patch antenna element 131. Are arranged in a periodic structure including a triangular arrangement and a square arrangement.

  The number of antenna elements arranged in the transmission AESA 12 and the reception AESA 13 is arbitrary. For example, in the case of a satellite communication system, the transmission AESA 12 and the reception AESA 13 have tens to thousands of transmission excitation patch antenna elements 121 and reception excitation patch antenna elements 131, respectively.

  The transmitting excitation patch antenna element 121 and the receiving excitation patch antenna element 131 are installed so that the boresight directions of the antenna element groups are away from each other. That is, the boresight directions of the plurality of transmission excitation patch antenna elements 121 have an inclination with respect to the Z direction perpendicular to the extending direction of the platform 11. Then, the boresight direction of the plurality of receiving excitation patch antenna elements 131 has an inclination in a direction opposite to the boresight direction of the transmitting excitation patch antenna element 121 with respect to the Z direction. The boresight direction here indicates the direction in which the beam is directed when there is no phase difference between the plurality of antenna elements included in the AESA and there is no scanning.

  The transmit excitation patch antenna element 121 and the reception excitation patch antenna element 131 tilt the boresight direction by an arbitrary method. For example, as shown in FIG. 1, when the boresight direction is parallel to the XZ plane and has an inclination with respect to the Z axis, each of the transmission AESA 12 and the reception AESA 13 has a plurality of inclinations along the X direction. Substrates 125 and 135 having surfaces are formed. The antenna elements arranged in the X direction are formed on different slopes. Accordingly, since the mounting surface of each antenna element has an inclination with respect to the upper surface of the platform 11, the boresight direction can be inclined. In this case, the thickness of the substrates 125 and 135 can be reduced.

  Further, as another method, as shown in FIG. 2, each of the transmission AESA 12 and the reception AESA 13 includes substrates 125 and 135 on which a plurality of inclined surfaces are formed along the X direction. A plurality of antenna elements arranged in the X direction may be formed on different slopes. Also in this case, since the mounting surface of each antenna element has an inclination with respect to the upper surface of the platform 11, the boresight direction can be inclined. In this case, the substrates 125 and 135 can be manufactured more easily than in the case of FIG.

  Further, as another method, as shown in FIG. 3, each of the transmission AESA 12 and the reception AESA 13 includes substrates 125 and 135 each having one inclined surface formed along the X direction. Then, all the antenna elements arranged in the X direction may be formed on the same slope. Also in this case, since the mounting surface of each antenna element has an inclination with respect to the upper surface of the platform 11, the boresight direction can be inclined. In this case, the manufacture of the substrates 125 and 135 becomes easier than in the case of FIG.

  Note that, in any of the cases of FIGS. 1 to 3, the shapes of the substrates 125 and 135 are not limited to those illustrated. The other portion may have any shape as long as it has an inclined surface for forming the antenna element. 1 to 3, the inclination angle of the inclined surface with respect to the upper surface of the platform 11 is determined according to the required noise characteristic and the transmission / reception output.

1 to 3, an inclined surface is formed on the substrate 125 along a _first direction d ₁ of the extension direction of the platform 11, and the substrate 135 is formed on the substrate 135 in the extension direction of the platform 11. An inclined surface is formed along the second direction d ₂ . The first direction d ₁ and the second direction d ₂ are arbitrary directions different from each other. For example, as shown in FIGS. 1 to 3, the first direction d ₁ is the + X direction and the second direction d ₂ is the −X direction.

  In addition, in the case of FIGS. 1 and 2, the inclination angles (inclinations in the XZ plane) of the plurality of inclined surfaces formed on the substrate 125 with respect to the extending direction of the platform are the same. Similarly, the inclination angles (inclinations in the XZ plane) of the inclined surfaces of the plurality of inclined surfaces formed on the substrate 135 with respect to the extending direction of the platform are the same.

  The transmission AESA 12 and the reception AESA 13 give a phase difference to the RF signal propagated by the phase shifter connected to the feeding line 122 and the feeding line 132. The phase is controlled by controlling the amount of phase shift for each antenna element or for each group of several antenna elements. As a result, the beam directing direction is changed to electronically scan the beam, and the beams of the transmitting AESA 12 and the receiving AESA 13 are directed in a predetermined direction.

  Here, even if the boresight directions of the plurality of transmission excitation patch antenna elements 121 and the boresight directions of the plurality of reception excitation patch antenna elements 131 are different from each other, the transmission AESA 12 and the reception AESA 13 perform the same electron beam scanning. Can be oriented in the direction of. That is, in the case of a satellite communication system, both the transmitting AESA 12 and the receiving AESA 13 can be directed to the same artificial satellite.

  The characteristics of the antenna unit 1 configured as above will be described.

FIG. 4 is a schematic diagram for explaining the reception band noise due to the output of the transmitter. When the frequency of the transmitted wave output by the transmitter is f _tx , noise due to the output of the transmitter occurs in the frequency band centered on f _tx . When the frequency of the received wave received by the receiver is f _rx , if noise due to the output of the transmitter also exists in the reception band centered on f _rx , the sensitivity of the receiver deteriorates.

  In particular, since the satellite communication system has a large power level difference between transmission and reception, the noise level due to the output of the transmitter becomes large relative to the power level of the received wave, and the desired signal-to-noise ratio cannot be obtained. . Therefore, an antenna configuration that increases the isolation amount between the transmitting and receiving antennas is required.

  FIG. 5 is a schematic diagram showing the correlation between the radiation pattern of the antenna element and the radiation pattern of AESA. It is known that the combined radiation pattern of AESA envelops the radiation pattern of the antenna element, as shown in FIG. When the beam pointing direction at the time of beam scanning of AESA is inclined with respect to the boresight direction of the antenna element group, the directivity gain in the beam pointing direction becomes smaller than the directivity gain in the boresight direction.

  FIG. 6 is a schematic diagram for explaining a decrease in coupling between the transmitting AESA 12 and the receiving AESA 13. When the boresight directions of the transmitting excitation patch antenna element 121 and the receiving excitation patch antenna element 131 are tilted so that the boresight directions thereof are away from each other, as shown in FIG. It changes in the direction of leaving. At this time, as shown by the arrow in FIG. 6, the coupling between the transmitting AESA 12 and the receiving AESA 13 decreases. That is, the noise in the reception band due to the output of the transmission AESA 12 is reduced, the difference from the reception power of the reception AESA 13 is increased, and the reception sensitivity is improved.

  As described above, the antenna unit 1 according to the present embodiment has the transmission excitation patch antenna element 121 and the reception excitation patch antenna element 131, respectively, on the substrates 125 and 135 on which the inclined surfaces having the inclination with respect to the platform 11 are formed. By forming it, the boresight direction of the transmission excitation patch antenna element 121 of the transmission AESA 12 and the boresight direction of the reception excitation patch antenna element 131 of the reception AESA 13 are tilted in directions away from each other. As a result, it is possible to reduce the coupling of reception band noise due to the output of the transmitter with the reception power of the receiver, and it is possible to improve the reception sensitivity.

Embodiment 2.
Hereinafter, embodiments for carrying out the present invention will be described in detail with reference to the drawings. FIG. 7 is an external view of the antenna unit 2 including the AESA according to this embodiment. As in the first embodiment, the communication device including the antenna unit 2 transmits and receives radio signals to and from an artificial satellite in a satellite communication system, for example.

  As shown in FIG. 7, the antenna unit 2 includes a platform 11, a transmission AESA 15 and a reception AESA 16. Here, the transmission frequency of the transmission wave transmitted by the transmission AESA 15 and the reception frequency of the reception wave received by the reception AESA 16 are different. That is, the communication device including the antenna unit 2 is used in the frequency division multiplexing system.

  The transmission AESA 15 has a plurality of transmission excitation patch antenna elements 151, a power supply line 152 that supplies power to each transmission excitation patch antenna element 151, and a plurality of transmission non-excitation patches 153 and 154. The reception AESA 16 has a plurality of reception excitation patch antenna elements 161, a feeding line 162 that supplies power to each reception excitation patch antenna element 161, and a plurality of reception non-excitation patches 163 and 164. The transmission AESA 15 and the reception AESA 16 are mounted adjacent to each other on the platform 11.

  The plurality of transmission excitation patch antenna elements 151 are arranged in a plane in the transmission AESA 15 in a periodic structure including a triangular arrangement and a square arrangement. Similarly, the plurality of receiving excitation patch antenna elements 161 are surface-arranged in the receiving AESA 16 in a periodic structure including a triangular arrangement and a square arrangement. In the present embodiment, when the extending direction of the platform 11 in FIG. 7 is the X direction and the Y direction, the transmission excitation patch antenna element 151 and the reception excitation patch antenna element 161 are arranged on the XY plane.

  The number of antenna elements arranged in the transmission AESA 15 and the reception AESA 16 is arbitrary. For example, in the case of a satellite communication system, each of the transmission AESA 15 and the reception AESA 16 has tens to thousands of transmission excitation patch antenna elements 151 and reception excitation patch antenna elements 161 arranged therein.

  The transmission excitation patch antenna elements 151 are arranged on a substrate 155 mounted on the upper surface of the platform 11, as shown in FIG. 7. Further, the transparent substrate 156 is fixed on the substrate 155, the transmission non-exciting patches 153 are arranged on the transparent substrate 156, the transparent substrate 157 is fixed on the transparent substrate 156, and the transmission non-excitation is performed on the transparent substrate 157. The excitation patch 154 is arranged. The transparent substrates 156 and 157 are substrates that transmit radio waves transmitted and received in the satellite communication system.

The number of transmission excitation patch antenna elements 151, the number of transmission non-excitation patches 153, and the number of transmission non-excitation patches 154 are the same, and they are arranged in association with each other. More specifically, the transmitting excitation patch antenna element 151, the transmitting parasitic patch 153, and the transmitting parasitic patch 154, which are associated with each other in the direction away from the platform 11 in the Z direction which is the direction perpendicular to the extending direction of the platform 11, are provided. They are arranged in order. Further, the transmission non-excitation patch 153 is formed at a position parallel to the transmission excitation patch antenna element 151 in the predetermined first direction d ₁ by the constant first length s ₁ , and the transmission non-excitation patch 153 is formed. On the other hand, the transmission non-excitation patch 154 is formed at a position translated in the same direction d ₁ by the same length s ₁ .

  Here, the transmission parasitic patches 153 and 154 have a shape that resonates with the transmission wave output by the transmission excitation patch antenna element 151, and are arranged close to the transmission excitation patch antenna element 151 to serve as directors. Function. That is, the transmission wave radiated from the transmission excitation patch antenna element 151 is attracted to the transmission non-excitation patches 153 and 154 and travels.

Therefore, by arranging the transmission parasitic patches 153 and 154 with respect to the transmission excitation patch antenna element 151 while displacing them in the predetermined direction d ₁ , the boresight direction of the transmission excitation patch antenna element 151 is extended. It can be directed in a direction inclined with respect to the Z direction perpendicular to the direction. The angle of inclination is determined according to the required noise characteristics and the transmission / reception output. Here, the boresight direction also indicates the direction in which the beam is directed when there is no phase difference between the antenna elements included in the AESA and there is no scanning.

  Similarly, the reception excitation patch antenna elements 161 are arranged on a substrate 165 mounted on the upper surface of the platform 11, as shown in FIG. 7. Further, the transparent substrate 166 is fixed on the substrate 165, the reception non-excitation patches 163 are arranged on the transparent substrate 166, the transparent substrate 167 is fixed on the transparent substrate 166, and the reception non-excitation is performed on the transparent substrate 167. The excitation patches 164 are arranged. The transparent substrates 166 and 167 are also substrates that transmit radio waves transmitted and received in the satellite communication system.

The number of reception excitation patch antenna elements 161, the number of reception non-excitation patches 163, and the number of reception non-excitation patches 164 are the same, and they are arranged in association with each other. More specifically, the receiving excitation patch antenna element 161, the receiving parasitic patch 163, and the receiving parasitic patch 164 are associated with each other in a direction away from the platform 11 in the Z direction which is a direction perpendicular to the extending direction of the platform 11. They are arranged in order. Further, the reception non-excitation patch 163 is formed at a position parallel to the reception excitation patch antenna element 161 in the predetermined second direction d ₂ by the constant second length s ₂ , and the reception non-excitation patch 163 is formed. On the other hand, the reception non-excitation patch 164 is formed at a position translated in the same direction d ₂ by the same length s ₂ .

  Here, the reception non-excitation patches 163 and 164 have a shape that resonates with the reception wave received by the reception excitation patch antenna element 161, and are arranged close to the reception excitation patch antenna element 161 to serve as a director. Function. In other words, the received wave that has arrived at the received AESA is attracted toward the reception non-excitation patches 163 and 164 and advances to the reception excitation patch antenna element 161.

As described above, by arranging the reception parasitic patches 163 and 164 with respect to the reception excitation patch antenna element 161 so as to be displaced in the predetermined direction d ₂ , the boresight direction is perpendicular to the extension direction of the platform 11. It can be directed in a direction inclined with respect to the direction. The angle of inclination is determined according to the required noise characteristics and the transmission / reception output.

Here, the direction d ₂ is different from the direction d _{1 in} which the transmission non-excitation patches 153 and 154 are translated in relation to the transmission excitation patch antenna element 151, and for example, the Z direction perpendicular to the extending direction of the platform 11 is an axis. When the direction is symmetrical to d ₁ . The translation length s ₂ may be the same as the length s ₁ . As a result, the boresight direction of the reception excitation patch antenna element 161 can be inclined with respect to the Z direction in the direction opposite to the boresight direction of the transmission excitation patch antenna element 151.

  The characteristics of the antenna unit 2 configured as above are the same as those of the first embodiment. That is, since the boresight direction of the transmitting excitation patch antenna element 151 and the boresight direction of the receiving excitation patch antenna element 161 are separated from each other, the coupling between both antenna elements is reduced. That is, the noise in the reception band due to the output of the transmission AESA 15 is reduced, the difference from the reception power of the reception AESA 16 is increased, and the reception sensitivity is improved.

  Further, unlike the case of mechanically tilting the boresight direction of the first embodiment, the configuration using the non-excitation patch of the second embodiment has a transmission excitation patch antenna element 151 and a reception excitation patch antenna element on a parallel plane. 161, the transmission non-excitation patches 153 and 154, and the reception non-excitation patches 163 and 164 are mounted, so that the configuration is simplified and the mounting is facilitated. In particular, such a planar configuration is advantageous for applications including an aircraft antenna that moves at high speed and causes air resistance.

  As described above, the antenna unit 2 according to the present embodiment includes the transmission non-excitation patches 153 and 154 that are translated in one direction with respect to the transmission excitation patch antenna element 151 of the transmission AESA 15, and the reception excitation of the reception AESA 16 is performed. Since the patch antenna element 161 is provided with the reception parasitic patches 163 and 164 that are moved in parallel in the opposite directions, the boresight directions of the transmission excitation patch antenna element 151 and the reception excitation patch antenna element 161 are tilted away from each other. It has a structure. This makes it possible to improve the reception sensitivity, simplify the configuration, and facilitate mounting.

  As described above, according to the present invention, the antenna unit includes the transmitting AESA including the plurality of transmitting excitation patch antenna elements and the receiving AESA including the plurality of receiving excitation patch antenna elements, and the boresight direction of the plurality of transmitting excitation patch antenna elements is provided. And the boresight direction of the plurality of receiving excitation patch antenna elements are tilted in directions away from each other. As a result, it is possible to obtain sufficient reception sensitivity even when the transmitting and receiving antenna elements are arranged close to each other.

  It should be noted that the present invention is not limited to the above embodiment, and various modifications can of course be made without departing from the gist of the present invention.

  For example, in the above embodiment, as a method of inclining the boresight directions of the transmitting excitation patch antenna elements 121 and 151 and the receiving excitation patch antenna elements 131 and 161, the mounting surface of the substrate is inclined or the transmitting non-excitation patches 153 and 154. Although the method of shifting the positions of the reception non-excitation patches 163 and 164 is used, the boresight direction may be tilted by another method. For example, the platform 11 may be tilted.

  Further, although the boresight directions of both the transmission excitation patch antenna elements 121 and 151 and the reception excitation patch antenna elements 131 and 161 are tilted, only one of them may be tilted depending on the required specifications of noise.

  1, 2, antenna unit, 11 platform, 12, 15 transmission AESA, 13, 16 reception AESA, 121, 151 transmission excitation patch antenna element, 122, 132, 152, 162 feeding line, 125, 135, 155, 165 substrate, 131 , 161 reception excitation patch antenna element, 153, 154 transmission non-excitation patch, 163, 164 reception non-excitation patch, 156, 157, 166, 167 transparent substrate.

Claims (12)

A transmission active electronic scanning antenna including a plurality of transmission excitation patch antenna elements (hereinafter referred to as transmission AESA),
A reception active electronic scanning antenna including a plurality of reception excitation patch antenna elements (hereinafter referred to as reception AESA);
A plurality of the transmitting excitation patch antenna elements, a boresight direction which is a beam directing direction when there is no phase difference and no scanning, and a plurality of the receiving excitation patch antenna elements having a beam directing direction when there is no phase difference and no scanning. A certain boresight direction and a direction away from each other,
Antenna unit. Further comprising a platform implementing the sending AESA and the receiving AESA,
The transmission AESA tilts the boresight direction by forming the transmission excitation patch antenna element on a first substrate on which an inclined surface having an inclination with respect to the extension direction of the platform is formed, or
The reception AESA tilts the boresight direction by forming the reception excitation patch antenna element on a second substrate on which an inclined surface having an inclination with respect to the extension direction of the platform is formed.
The antenna unit according to claim 1. The transmission AESA includes the first substrate on which the plurality of inclined surfaces are formed, and the transmission excitation patch antenna element is formed on each of the inclined surfaces of the first substrate,
The reception AESA includes the second substrate on which the plurality of inclined surfaces are formed, and the transmission excitation patch antenna element is formed on each of the inclined surfaces of the second substrate.
The antenna unit according to claim 2. The transmission AESA forms two or more transmission excitation patch antenna elements on each of the inclined surfaces of the first substrate,
The reception AESA forms two or more transmission excitation patch antenna elements on each of the inclined surfaces of the second substrate.
The antenna unit according to claim 3. A plurality of the inclined surfaces of the first substrate are formed along a first direction of an extension direction of the platform;
A plurality of the inclined surfaces of the second substrate are formed along a second direction in which the platform extends.
The antenna unit according to claim 3 or 4. The inclined surfaces of each of the first substrates have the same inclination with respect to the extending direction of the platform,
The inclined surfaces of each of the second substrates have the same inclination with respect to the extending direction of the platform,
The antenna unit according to any one of claims 3 to 5. The transmission AESA includes the first substrate on which the inclined surface is formed, and all the transmission excitation patch antenna elements are formed on the same inclined surface of the first substrate,
The reception AESA includes the second substrate on which the inclined surface is formed, and all the reception excitation patch antenna elements are formed on the same inclined surface of the second substrate.
The antenna unit according to claim 2. Further comprising a platform implementing the sending AESA and the receiving AESA,
The transmit AESA comprises a transmit parasitic patch on the opposite side of the transmit excitation patch antenna element from the platform,
The receive AESA comprises a receive parasitic patch on the opposite side of the receive excited patch antenna element from the platform,
The transmitting parasitic patch and the receiving parasitic patch are moved in parallel in mutually opposite directions so that the boresight direction of the plurality of transmitting exciting patch antenna elements and the bores of the plurality of receiving exciting patch antenna elements. The site direction and the direction away from each other,
The antenna unit according to claim 1. The transmitting AESA includes the transmitting excitation patch antenna elements, a first transmitting non-exciting patch, and a second transmitting non-exciting patch, which are sequentially arranged in a direction perpendicular to the extending direction of the platform. In a direction parallel to, the first transmit parasitic patch is offset from the transmit excitable patch antenna element in a first direction by a first length, and the second transmit parasitic patch is From one transmit parasitic patch in the first direction by the first length,
The reception AESA includes the reception excitation patch antenna elements, a first reception non-excitation patch, and a second reception non-excitation patch, which are sequentially arranged in a direction perpendicular to the extension direction of the platform. In a direction parallel to, the first receiving parasitic patch is offset from the receiving exciting patch antenna element in a second direction by a second length, and the second receiving parasitic patch is From one receive parasitic patch in the second direction by the second length,
The antenna unit according to claim 8. The boresight direction of the transmitting excitation patch antenna element and the boresight direction of the receiving excitation patch antenna element are inclined in directions opposite to each other with respect to a direction perpendicular to the extending direction of the platform. ,
The antenna unit according to any one of claims 2 to 9. Used in a frequency division multiplexing system in which the transmission frequency of the transmission wave of the transmission AESA and the reception frequency of the reception wave of the reception AESA are different;
The antenna unit according to any one of claims 1 to 10.   A communication device comprising the antenna unit according to claim 1.

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