KR200408690Y1 - Lightweight Radar Antenna - Google Patents

Abstract

The present invention can be lightened by using a fiber-reinforced plastic (FRP) attached to both sides of the honeycomb cell in a tracking radar antenna for automatically tracking and intercepting the direction of attack in the event of an enemy aircraft or missile attack. The present invention relates to a fast rotating light weight tracking radar antenna with improved side lobe characteristics. The antenna of the present invention is a dual reflector plate with a parabolic fiber-reinforced plastic plate attached to both sides of the honeycomb insulator, and converts the linearly polarized wave into a circularly polarized wave and then converts it into another linearly polarized wave and reflects it; Parabolic fiber-reinforced plastic plates are attached to both sides of the honeycomb insulator, and select one of the vertical polarization and the horizontal polarization to pass through the sub-reflection plate and reflect the other to the main reflection plate side; A reflector frame for removing the side lobe between the sub-reflection plate and the main reflection plate; One feed horn; A housing including a feed system and a mode coupler in a case having a fiber reinforced plastic plate attached to both surfaces of the honeycomb insulator; And a mechanical structure for supporting the antenna plate consisting of the main reflection plate and the sub reflection plate, and driving up, down, left, and right.

Tracking, Antenna, Lightweight, FRP, Honeycomb, High Speed, Reflector, Feed Horn

Description

LIGHT WEIGHT RADAR ANTENNA FOR TRACKING}

1 is a view showing a tracking radar antenna using a sub-reflective plate according to the present invention,

FIG. 2 is a detailed view of the sub-reflective plate shown in FIG. 1;

3 is a detailed view of the main reflector shown in FIG. 1;

4 is a view showing a tracking radar antenna of the structure in which the horn is attached to the front of the main reflector according to the present invention,

5 is a view showing the appearance of a horn used in the antenna according to the present invention,

6 is a diagram illustrating a feed horn, a mode coupler wiring, and a transmission / reception system of an antenna according to the present invention;

7 is a schematic illustration of a conventional tracking radar antenna.

* Explanation of symbols for main parts of the drawings

110: main reflection plate 111,113: carbon fiber reinforced plastic plate

115: glass fiber reinforced plastic sheet

112, 114: honeycomb cell 116: inclined stripline

117: epoxy film 120: polarized (horizontal / vertical) optional sub-reflective plate

121,123: glass fiber reinforced plastic plate 122: honeycomb cell

124: reflective stripline 125: epoxy film

130: reflector frame 131,133: carbon fiber reinforced plastic plate

132: honeycomb cell 134: radio wave absorber

140: Feed Horn 141: Mod Coupler

142: mode transducer 143: feeding flange connector

150: enclosure 151,153: carbon fiber reinforced plastic sheet

152: honeycomb cell 161: vertical support

162: vertical rotating body 163: waveguide

162a: vertical rotating gear 162b: pinion gear

164: horizontal turntable 165: antenna mount

166: horizontal rotary joint and horizontal slip ring
167: vertical rotary joint and vertical slip ring

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210: reflection plate 211, 213: carbon fiber reinforced plastic plate

212: honeycomb cell 220: feed horn housing

221: Feedhorn 222: mod coupler

230: waveguide 240: equipment enclosure

241,243: carbon fiber reinforced plastic sheet 242: honeycomb cell

244: transceiver and ACU 251: vertical support

252: vertical rotating body 253: horizontal rotating table

252a: vertical rotating gear 252b: pinion gear

254: antenna mount 255: horizontal rotary joint and horizontal slip ring

256: vertical rotary joint and vertical slip ring

302: moisture-proof cover 304: feed horn

306: circular waveguide 307: mod coupler

308: mode transducer 310: feed Huren connector

321: LNA 322: D / C

323: tracking receiver 324: antenna control unit (ACU)

325: vertical drive motor 326: horizontal drive motor

H: Hybrid (ratling or magic tea)

The present invention relates to a tracking radar antenna for automatically intercepting and intercepting the direction of arrival in the event of an enemy aircraft or missile attack, and more specifically, a material having fiber reinforced plastics (FRP) attached to both sides of a honeycomb cell. The present invention relates to a high-speed rotating light weight tracking radar antenna that can be lightened using and improves side lobe characteristics by using a single feed horn.

In general, the tracking radar antenna is an antenna for detecting and tracking an object moving at high speed, such as an aircraft or a missile, and it is required to be lightweight in order to quickly track the movement of the object.

However, in the conventional tracking radar antenna, as shown in FIG. 7, since the reflector plate 1 and the enclosures 2 and 3 are made of metal such as aluminum, it is difficult to rotate at high speed and rotates at high speed with a large-capacity driving device. If you do, there was a problem that frequently occurs. In addition, the conventional tracking radar antenna uses four feed horns, two in the horizontal direction (H1, H2) and two in the vertical direction (V1, V2), to obtain monopulse signals in the horizontal and vertical directions. In addition, when four feed horns H1, H2, V1, and V2 are arranged, there is a problem that the horn is not located at the center of the focal point, so that the gain is reduced and the side lobe characteristics are deteriorated and the efficiency is lowered.

The present invention was devised to solve the above problems, and is a material that attaches carbon or glass fiber reinforced plastic (FRP) to both sides of the honeycomb cell, and implements an antenna reflector and an enclosure so that it can be lightened and rotate at high speed. The purpose is to provide a lightweight tracking radar antenna.

Another object of the present invention is to provide a lightweight tracking radar antenna having improved side lobe characteristics by installing a single feed horn at a focal point and generating a monopulse signal for tracking using a mode coupler.

In order to achieve the above object, an embodiment of the present invention is a honeycomb thin metal or a main reflection plate with a parabolic carbon fiber reinforced plastic plate attached to both sides of the insulator, or a glass fiber reinforced plastic honeycomb dual structure reflector to rotate the linear polarization A main reflection plate for converting a circularly polarized wave and converting it back into another linearly polarized wave and reflecting it; Attached to both sides of the honeycomb insulator, a glass fibre-reinforced plastic plate of the case is attached, the sub-reflection plate for selecting and passing one of the vertical polarization or horizontal polarization and the other to the main reflecting plate side; A reflector frame for removing the side lobe between the sub-reflection plate and the main reflection plate; One feed horn; A housing including a feed system and a mode coupler in a case having a fiber reinforced plastic plate attached to both surfaces of the honeycomb insulator; And a mechanical structure for supporting the antenna plate consisting of the main reflection plate and the sub reflection plate, and driving up, down, left, and right.

In addition, another embodiment of the present invention to achieve the above object is a reflection plate attached to the parabolic carbon fiber reinforced plastic plate on both sides of the honeycomb thin metal or insulator; A feed horn positioned at the front center focus of the reflector; A transmission line for supporting the feed horn and transmitting a radio wave signal; A housing installed at a rear surface of the reflector and including devices in a case having a structure of carbon fiber reinforced plastic plates attached to both surfaces of the honeycomb insulator; And mechanical structures for supporting the reflector and driving up, down, left, and right.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.

First, the tracking radar antenna of the present invention mainly uses a microwave frequency band, in the embodiment of the present invention will be described taking the antenna of the Ku band frequency as an example. In addition, in describing the tracking antenna of the present invention for the convenience of understanding, the structure using the sub-reflection plate and the dual main reflection plate will be described as the first embodiment, and the structure in which the feed horn is installed at the focus of the reflecting plate will be described as the second embodiment. The description will be made separately.

[First Embodiment]

1 is a view showing a tracking radar antenna using a sub-reflection plate according to the present invention, Figure 1a is a plan view, Figure 1b is a front view, Figure 1c is a rear view, Figure 1d is a side view. FIG. 2 is a detailed view of the sub-reflection plate shown in FIG. 1, and FIG. 3 is a detailed view of the main reflection plate shown in FIG. 1.

As shown in FIG. 1, the antenna 100 according to the first embodiment of the present invention includes a main reflector 110 having a dual structure in which a carbon and glass fiber reinforced plastic (FRP) plate is attached to a honeycomb cell, and a honeycomb cell. Sub-reflective plate 120 attached to the glass fiber reinforced plastic (GFRP) plate, reflector plate 130 to remove the side lobe, one feed horn 140, feed in the case of the structure of the carbon fiber reinforced plastic plate attached to the honeycomb cell Enclosure 150 having a built-in system and mode coupler, etc., consists of mechanical structures for supporting the antenna and driving up, down, left and right.

The sub-reflective plate 120, as shown in the detailed view of Figure 2, is a casein green or a strain attached to the glass fiber reinforced plastic (FRP) plate (121, 123) on both sides of the insulator of the honeycomb cell 122, the inner side of the sub-reflection plate On the glass fiber reinforced plastic plate 123 of the main reflecting plate side, the reflective stripline 124 of the conductor for selectively reflecting only horizontal (or vertical) polarization and passing only vertical (or horizontal) polarization is horizontal (or vertical). The reflective strip lines 124 are attached to the inner glass fiber reinforced plastic plate 123 by the thin film epoxy film 125. Fiber reinforced plastic (GFRP) having insulation is used as the fiber reinforced plastic used for the sub-reflective plate 120. The polarization (horizontal and vertical) selective sub-reflective plate 120 is composed of a curved surface such as a case-green or modified case-green, and an insulated lightweight honeycomb cell (the shape of the cell is triangular, quadrangular, pentagonal, hexagonal, etc.). Thin FRP plates 121 and 123 are attached to both sides of the insulating material having a small dielectric constant, and the metal frames are arranged in a horizontal manner to be attached to the FRP plates 123 of the inner surface (feed horn side) as a whole. After bonding to the thin film epoxy (125). In addition, the sub-reflection plate 120 may be configured to be rotated by 90 degrees according to the polarization (vertical or horizontal) of the feed horn 140 to be fixed with an adhesive after the horizontal or vertical radiation variable. That is, the sub-reflection plate 120 can be rotated more than ± 90 ° according to the horizontal polarization reflection-vertical polarization pass or the vertical polarization reflection-horizontal polarization pass according to the polarization outputted from the feed horn 140, so as to be a strong adhesive after the polarization conversion. It can also be configured to be fixed (re-adhesive after removal of the adhesive during reconditioning).

As shown in the detailed drawing of FIG. 3, the main reflector 110 is insulated from the first main reflector having the carbon fiber-reinforced plastic plates 111 and 113 attached to both conductors (thin metals) or insulators of the honeycomb cell 112. One surface of the insulator of the honeycomb cell 114 is in contact with the carbon fiber reinforced plastic plate 113 of the first main reflection plate, and the other side is attached to the glass fiber reinforced plastic plate 115 of the concave surface after attaching the glass fiber reinforced plastic plate 115. The sub-reflection plate strip line and the second main reflector plate on which the inclined strip lines 116 having a 45-degree inclination are arranged are combined.

The fiber-reinforced plastic plates 111 and 113 of the first main reflection plate for reflection in the main reflection plate 110 mainly use carbon fiber reinforced plastic (CFRP), and in particular, the fiber reinforcement at the center where the first main reflection plate and the second main reflection plate meet. The plastic plate 113 is preferably plated or painted with a thin film or a conductive metal such as gold, silver or copper on a carbon fiber reinforced plastic plate (or glass fiber reinforced plastic plate).

The fiber-reinforced plastic plate 115 of the second main reflection plate for polarization conversion uses an insulating glass fiber-reinforced plastic plate, and the glass fiber-reinforced plastic plate 115 has a 45 ° slope to the right (or to the left). Inclined strip lines 116 arranged at regular intervals have a thin film epoxy film 117 attached thereto. The second main reflection plate converts the vertical polarization into the right rotating circular polarization (or the left rotating circular polarization) by the inclined strip line 116 so that the first main reflecting plate reflects the right rotating circular polarization (or the left rotating circular polarization). To this end, the thickness of the second main reflector is preferably adjusted so that the phase is delayed by 90 degrees.

That is, the main reflector 110 is a thin and strong carbon fiber board (CFRP) (111, 113) on both sides of the thin-thin honeycomb cell (triangular, tetragonal, pentagonal, hexagonal, etc.), and the internal CFRP plate ( 113) is coated, plated, or metal-coated with high frequency gold, silver, copper or thin metal plates. And when attaching the polarization conversion main reflection plate (second main reflection plate) inside the conductorized main reflection plate (first main reflection plate) in this manner, after attaching the insulator thin honeycomb at a constant thickness and about 90 degree phase delay, the thin glass again The FRP curved plate 115 is attached, and inclined striplines 116 having a 45 degree direction angle to the horizontally polarized plane are applied thereon at narrow intervals.

In addition, the rear surface of the main reflector plate is attached to the enclosure fasteners in a circular manner to attach the cylindrical housing 150 to attach the enclosure 150, the enclosure is equipped with a switch (door) for maintenance, tracking inside the enclosure It is possible to insert the mode caplar, LNA, D / C, receiver, etc., which extracts the difference signal.

Reflector frame 130 is made of a cylindrical material of carbon fiber reinforced plastic plates 131, 133 attached to both sides of the insulator of the honeycomb cell 132 and mechanically connects the main reflector 110 and the sub-reflective plate 120 A sealed space is formed inside, and a radio wave absorber 134 is attached to the inside of the reflector frame 130 to suppress unnecessary side lobes.

The feed horn 140 is positioned at the center of the main reflector 110 to radiate horizontal (or vertical) polarization fed from the feed system of the enclosure 150 to the sub reflector 120 when transmitting, and receives the sub reflector 120 when received. It receives the horizontal (or vertical) polarization that is reflected (focused) and reflected by) and transmits it to the power supply system in the enclosure.

The enclosure 150 is made of a material in which the case is attached with carbon fiber reinforced plastic plates 151 and 153 on both surfaces of the insulator of the honeycomb cell 152, and a power supply flange connector, a mode coupler, and the like are incorporated in the enclosure case. In addition, the main body 150 is attached to the opening and closing cover (door) for repairable in the event of a receiver failure, and to vertically rotate the antenna by attaching a vertical rotating device 162 to enable the vertical elevation rotation of the antenna, vertical rotation A vertical rotary joint, a vertical slip ring 167, and the like are attached to the center of the pinion gear 162b so as not to interfere with the electrical signal power supply during vertical rotation. The vertical rotating device 162 is attached to the antenna vertical support 161, and then attaches a driving device (motor or air compressor) and attaches to the horizontal rotating table 164. The horizontal swivel 164 may be attached with a horizontal rotating device, a high frequency transmission and reception device, and a horizontal rotary joint and a horizontal slip ring 166 may be attached to enable transmission of power and signals.

The mechanical structures for supporting the antenna and driving up, down, left, and right are composed of a vertical support 161, a vertical rotating body 162, a horizontal rotating table 164, an antenna mounting unit 165, and the sub-reflective plate 120. The antenna plate made of the main reflector plate 110 is supported by the vertical support 161 and can be rotated in an elevation direction by the vertical rotating body 162 made of the vertical motor 162a and the vertical pinion gear 162b. The vertical support 161 is connected to the horizontal swivel 164 and rotated by the horizontal swivel 164 to rotate the antenna plate in the azimuth direction. At this time, the horizontal swivel 164 is supported by the antenna mount 165, the horizontal rotary joint and the horizontal slip ring 166 is provided on the horizontal swivel to feed the signal and supply power to the antenna irrespective of the rotation of the horizontal rotating body. It is installed.

As described above, the antenna of the first embodiment of the present invention uses a polarization-selective sub-reflective plate on the front side so that there is no radio wave obstruction in the case of the transmissive vertical radiation polarization, so that there is little side lobe (side lobe), and it is lightweight and extremely low in rotational driving load. In addition, the scat was surrounded by a carbon fiber honeycomb at the edge of the reflector, and the radio wave absorber 134 was attached therein to improve the side lobe characteristics.

The transmission / reception path of radio waves in the antenna of the first embodiment configured as described above is as follows.

[When sending]

First, the horizontal polarized wave supplied to the feed horn 140 through the feeding flange connector 143 at the time of transmission is radiated toward the sub-reflection plate 120 as shown in the arrow direction shown in FIG. 1A. The sub-reflection plate 120 totally reflects the horizontal polarization to the main reflection plate 110 by the inner horizontal reflection strip line 124, and the second main reflection plate of the main reflection plate 110 is horizontally polarized by the inclined strip line 116. Convert to right-circular circular polarization. The right rotating circular polarization is totally reflected from the carbon fiber reinforced plastic plate 113 of the first main reflecting plate to become a left rotating circular polarization, and the left rotating circular polarization is incident to the second main reflecting plate side, and the second main reflecting plate again vertically rotates the left rotating circular polarization. Converted to polarized wave and transmitted to the sub-reflection plate side (120). The vertical polarization transmitted to the sub-reflection plate 120 passes through the horizontal reflection stripline 124 with little attenuation and is radiated into the air (space).

[On reception]

The radio wave received from the air (space) is passed through the vertical polarization only in the sub-reflection plate 120 is converted into a left rotation circular polarization by the second main reflection plate, and then in the carbon fiber reinforced plastic plate 113 of the first main reflection plate After the reflection, the right-turned circular polarized light is passed, and the right-turned circular polarized light is converted into a horizontal polarized wave while passing through the second main reflecting plate, and transmitted to the sub-reflecting plate 120, and the horizontal polarized wave is transmitted to the horizontal reflective strip line 124 of the sub-reflecting plate. Is reflected and focused by the feed horn 140. The signal transmitted to the feed horn 140 is transmitted to the receiver through the main feed line as described below, and some signals are monitored by the mode coupler to generate a monopulse signal for tracking.

Second Embodiment

Figure 4 is an example of an antenna of the Ku Band frequency band horn attached to the reflector focus according to the present invention, Figure 4a is a plan view, Figure 4b is a rear view, Figure 4c is a side view of the enclosure, Figure 4d is a side view, Figure 4e is a front view to be.

As shown in FIG. 4, the antenna 200 according to the second embodiment of the present invention includes a parabolic reflector 210 having carbon fiber reinforced plastic attached to both surfaces of a honeycomb cell, and a front center focus of the reflector 210. One feed horn 221 located at, the feed horn 221 and the feed horn 221 for embedding the mode coupler 222, the waveguide for supporting the feed horn 220 and transmitting a radio signal 230, the rear of the reflector 210, and the equipment housing 240, which incorporates the transceiver and the control devices in the case of the structure of the carbon fiber reinforced plastic plate attached to the honeycomb cell, and supports the reflector and drives up, down, left and right It consists of mechanical structures for

As shown in FIG. 4, the reflector 210 has a structure in which carbon fiber-reinforced plastic plates 211 and 213 are attached to both conductors (thin metals) or insulators of the honeycomb cell 212, and concave carbon fiber reinforcement. The plastic plate 213 is preferably formed by plating or coating a metal having good conductivity such as gold, silver, and copper on a carbon fiber reinforced plastic plate. That is, the reflective plate 210 of the second embodiment attaches thin and strong carbon fiber plates 211 and 213 to both sides of the thin metal or insulator of the thin-thin honeycomb cell (cell is triangular, tetragonal, pentagonal, hexagonal, etc.) 212. On the inner surface, gold, silver, copper or metal foil with good conductivity is applied, plated or painted at high frequency. In addition, the rear of the reflector plate to attach the equipment fasteners in a circular manner to attach the cylindrical fasteners 240 to the equipment enclosure 240, the equipment enclosure 240 is provided with a switch (door) for maintenance In this case, a low noise amplifier (LNA), a transceiver, and the like can be inserted into the enclosure.

The feed horn 221 is installed in the feed horn 220, and is installed toward the reflector 210 at the front focal length of the reflector 210 to reflect the radio waves fed from the feed system of the equipment enclosure 240 during transmission. Transmitting to the (210) side, and receives the concentrated radio wave reflected by the reflector 210 at the time of reception and transmits to the power supply system in the equipment enclosure 240.

The equipment enclosure 240 is made of a material in which a case has carbon fiber reinforced plastic plates 241 and 242 attached to both sides of the insulator of the honeycomb cell 242, and is attached with an opening / closing door (cover) for repairing in case of failure of the receiver. And vertically rotate the antenna by attaching a vertical rotary device 252 that enables the antenna to rotate vertically. A vertical rotary joint and a slip ring 256 are attached to the center of the vertically rotated pinion gear 252b. The electrical signal and power supply are not disturbed. The vertical rotating device 252 is attached to the antenna vertical support 251, and then attaches a driving device (motor or air compressor) and attaches to the horizontal rotating table 253. A horizontal rotary joint or a slip ring 255 is attached to the horizontal swivel 253 to enable transmission of power and signals.

Mechanical structures for supporting the antenna and driving up, down, left, and right are composed of a vertical support 251, a vertical rotating body 252, a horizontal rotating table 253, an antenna mounting unit 254, and a reflecting plate ( The 210 is supported by the vertical support 251 and can be rotated in an elevation direction by the vertical rotation body 252 including the vertical motor 252a, the vertical pinion gear 252b, and the like. ) Is connected to the horizontal rotating table 253 and rotated by the horizontal rotating body so that the antenna plate can be rotated in the azimuth direction.

In addition, the transmission line 230 transmits a signal transmitted from the feed horn 221 and the mode coupler 222 to the enclosure 240 after the reflector plate 210. The spherical waveguide or coaxial tube is transmitted in four directions for the feed horn support. It supports the reflector 210 and transmits a signal to the rear part of the reflector using all or part of the waveguide.

In the tracking radar antenna of the second embodiment, the transmission signal fed from the transmitter of the equipment enclosure through the waveguide is radiated from the feed horn 221 to the reflecting plate 210 side, and the conductive carbon fiber reinforced plastic plate 213 is feed. Reflects the radio waves transmitted from the horn 221 into space. In addition, the radio wave transmitted from the space at the time of reception is reflected and focused by the reflector 210 and received by the feed horn 221 located at the focal length, and the received signal received by the feed horn 221 is the main feeder as described below. In addition to being delivered to the receiver via a furnace (such as a waveguide or coaxial line), some signals are monitored by the mode coupler 222 to generate a differential signal for tracking.

[Feed Horn and Tracking Signal Processing System]

5 is a view showing the appearance of a feed horn used in the antenna according to the present invention, Figures 6a and 6b is a block diagram showing a tracking signal processing system of the antenna according to the present invention.

Feed horn 300 used in the embodiment of the present invention is a corgate horn, as shown in Figure 5, the moisture-proof cover 302 is provided on the opening surface of the fallopian horn 304, the rear of the horn Outside the circular waveguide 306, eight mode couplers 307-1 to 307-8 and six hybrids (H1 to H6: may use rat rings or magic teas) are installed to monitor the signal transmitted through the waveguide. To generate a monopulse difference signal for tracking, and the circular waveguide 306 is connected with a mode tube transducer 308 and a feeding flange connector 310. That is, the mode transducer 308 is attached to the end of the circular waveguide 306 at the center of the mode coupler to draw out the rectangular waveguide TE ₁₀ mode to the feeding flange connector 310 to enable RF data transmission and reception.

That is, in the case of the first embodiment, the feed horn 300 is attached to the center of the main reflector plate, the circular waveguide 306 for the mode coupler is attached to the rear side, and the eight-slot slotted coupler 307-1 around the circular waveguide 306. 307-8), but the adjacent coupler electrical angle is 90˚ (mechanical angle is 45˚), and combined with each other in the hybrid (H1 ~ H6) to the monopulse difference signals ΔE, XΔE (△ Az) After drawing, it is connected to the low noise amplifier (LNA), the down converter (D / C), the tracking receiver, and the antenna control unit (ACU) to enable automatic tracking, and at the end of the circular waveguide, the mode transducer 308, It is connected to the mode conversion spherical conduit (or coaxial tube) connector 310 to enable data transmission and reception.

In addition, the difference signals ΔE and XΔE for tracking obtained in the hybrid H are passed through the low noise amplifier LNA and the down converter D / C, and then through the tracking receiver TRACK RX and the antenna controller ACU. The vertical (angular) driving motor 325 and the horizontal (azimuth) driving motor 326 are respectively driven.

At this time, in the case of the high speed type, the vertical tracking receiver 323a and the horizontal tracking receiver pass through the vertical LNA 321a, the vertical down converter 322a, the horizontal LNA 321b, and the horizontal down converter 322b, as shown in FIG. 6A. 323b, the vertical antenna controller 324a and the horizontal antenna controller 324b respectively drive the vertical drive motor 325 and the horizontal drive motor 326 so that they can be processed quickly.

In case of the low speed type, as shown in FIG. 6B, after combining the difference signals ΔE and XΔE for tracking using the hybrid H7, one LNA 321 and the D / C 322 are combined. In addition, the tracking receiver 323 and one antenna controller unit 324 may be configured in an inexpensive structure.

As described above, according to the present invention, by using a very light carbon or glass fiber reinforced plastic (FRP) plate attached to both surfaces of the honeycomb cell insulator and the reflector and the enclosure of the antenna, the total weight of the antenna is greatly reduced and lightened. By installing only at the focal length using the feed horn of the eccentric does not occur, there is an advantage that can improve the antenna characteristics by suppressing the side lobe. In other words, the antenna of the present invention adopts a honeycomb carbon fiber method to enable high-speed rotation without damage to the first 360-degree speed in the case of a 1m diameter antenna can also track high-speed missiles.

Claims (10)

A main reflection plate having a double structure reflector plate having parabolic carbon and glass fiber reinforced plastic plates attached to both sides of a honeycomb thin metal or an insulator, and converting linear polarization into a circular circular polarization and then converting the linear polarization into another linear polarization; Attached to both sides of the honeycomb insulator, a glass fibre-reinforced plastic plate of the case is attached, the sub-reflection plate for selecting and passing one of the vertical polarization or horizontal polarization and the other to the main reflecting plate side; A reflector frame for removing the side lobe between the sub-reflection plate and the main reflection plate; One feed horn; A housing including a feed system and a mode coupler in a case having a structure of a fiber reinforced plastic plate attached to both surfaces of a honeycomb thin metal or an insulator; And Light weight tracking radar antenna comprising a mechanical structure for supporting the antenna plate consisting of the main reflection plate and the sub-reflection plate, and to drive up, down, left and right. The method of claim 1, wherein the sub-reflection plate The glass fiber reinforced plastic plate on the main reflecting plate side has a plurality of reflective strip lines arranged at regular intervals to selectively reflect only horizontal (or vertical) polarization and pass only vertical (or horizontal) polarization. And the reflective strip lines are attached to the glass fiber reinforced plastic plate by a thin film epoxy film. The method of claim 1, wherein the main reflector plate A first main reflector plate having a parabolic carbon fiber reinforced plastic plate attached to both sides of a honeycomb thin metal or an insulator; One side of the honeycomb insulator is in contact with the carbon fiber reinforced plastic plate of the first main reflecting plate and attached to the other side of the glass fiber reinforced plastic plate of casein green or modified, and then the inclined strip line of 45 ° angle is attached to the glass fiber reinforced plastic plate. It is arranged in multiple intervals and has a dual structure in which a second main reflector for converting linear polarization into rotating circular polarization or linear circular polarization is combined. The central carbon fiber reinforced plastic plate where the first main reflecting plate and the second main reflecting plate meet is a light weight tracking radar antenna characterized in that a metal having good conductivity is plated, painted, or attached to a carbon fiber reinforced plastic plate. . The method of claim 1, wherein the reflector frame It consists of a cylinder attached with carbon fiber reinforced plastic plates on both sides of the honeycomb thin metal or insulator, and mechanically connects the main reflection plate and the sub reflection plate, and forms a sealed space therein. Light weight tracking radar antenna, characterized in that the carbon fiber reinforced plastic plate is attached to the radio wave absorber for suppressing unnecessary side lobes. The method of claim 1 wherein the feed horn is Located at the center of the sub-reflection plate and in the center of the main reflection plate, the horizontal (or vertical) polarization fed from the feeding system of the enclosure when transmitting is radiated to the sub-reflection plate side, and when received, the horizontal (reflected and concentrated by the sub-reflection plate) Or vertical) polarized light receiving radar antenna, characterized in that for transmitting to the power supply system in the enclosure. The method of claim 1, wherein the antenna Attach the feed horn to the center of the main reflector plate, attach a circular waveguide for the mode coupler to the rear, and attach an eight equal slot-type mode coupler around the circular waveguide, but mutually adjacent coupler electrical angle 90 ˚ mutually To extract monopulse difference signals ΔE, XΔE (△ Az) and connect them to the low noise amplifier (LNA), down converter (D / C), tracking receiver, and antenna control unit (ACU) for automatic tracking. Makes this possible, Light wave tracking radar antenna, characterized in that the circular waveguide terminal is connected to the mode transducer and the mode conversion spherical waveguide connector to transmit and receive data. The method of claim 1, wherein the antenna The sub-reflection plate can be rotated more than ± 90 ° according to the horizontal polarization reflection-vertical polarization pass or the vertical polarization reflection-horizontal polarization pass according to the polarization output from the feed horn. Radar antenna for weight tracking. A reflection plate having a parabolic carbon fiber reinforced plastic plate attached to both surfaces of the honeycomb thin metal or the insulator; A feed horn positioned at the front center focus of the reflector; A transmission line for supporting the feed horn and transmitting a radio wave signal; A housing installed at a rear surface of the reflector and including devices in a case having a structure of carbon fiber reinforced plastic plates attached to both surfaces of the honeycomb insulator; And A light weight tracking radar antenna comprising mechanical structures for supporting the reflector and driving up, down, left and right. delete delete

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