JP3752548B2 - Portable deployable antenna - Google Patents

Description

The present invention relates to a portable deployable antenna that is used to communicate with an artificial satellite and can be folded and stored in a thin case.

Conventionally, as a portable deployable antenna for communicating with an artificial satellite, an antenna that can be folded and stored in a thin case has been known (for example, see Patent Document 1). Hereinafter, this example will be described as a conventional example.

  FIGS. 24 to 27 are explanatory diagrams (parts 1 to 4) of the conventional examples. Hereinafter, the conventional examples will be described with reference to these drawings. 24 to 27, 10 is a case, 11 is an upper lid, 11a and 12a are inner surfaces of the lid, 12 is a bottom lid, 13 is a connecting portion, 20 is a surface state, 31 and 32 are outer edge support members, and 33 is a central portion. The support member, 34 is a bent portion, 40 is a connecting member, 41 to 45 are installation positions of the connecting member, 51 is a power feeding unit, and 52 is a support bar.

  The case 10 that houses at least the planar body 20 is a thin, substantially rectangular parallelepiped, and includes an upper lid 11 and a bottom lid 12. The top lid 11 and the bottom lid 12 are configured to be openable and closable via the connecting portion 13. On the inner surfaces 11a and 12a, when the case 10 is opened, the planar body 20 is expanded to have a predetermined curved shape, and when the case 10 is opened, the planar body 20 is relaxed. A connecting member 40 is attached.

  The planar body 20 is made of a flexible conductive mesh material, and since the curved surface shape when expanded is a parabolic surface, it is used as a parabolic antenna. The outer edge portion of the planar body 20 is supported by rigid and annular outer edge support members 31 and 32. Each outer edge support member 31, 32 has a semi-annular shape, and when both are combined, it becomes a complete annular shape.

  Therefore, the two outer edge support members 31 and 32 can be bent at two connection portions 34 and 34 corresponding to the connecting portions thereof, that is, the diameter position of the ring. When the outer edge support members 31 and 32 are folded at the bent portions, the circular shape is reduced to a semicircular shape.

  A parabolic center support member 33 is attached to the two bent portions 34, 34 to connect the both 34, 34 and to support the center of the planar body 20. The center part of the planar body 20 is appropriately attached to the center support member 33 with yarns.

  The center support member 33 supports the planar body 20 and contributes to its expansion. In addition, when the outer edge support members 31 and 32 are folded at the bent portions 34 and 34, the planar body 20 is supported. There is also an effect of stably storing the case in the case 10. For the connecting member 40 that connects the inner surfaces 11a, 12a of the case 10 and the planar body 20, a flexible linear body such as yarn is used.

  The connecting member 40 is arranged at positions 41 and 41 between the upper outer edge support member 31 and at a position 42 between the lower outer edge support member 32 and the outer edge support member folded. 31 and 32 are fully expanded.

  Further, by being arranged at the position 43 between the central support member 33, the influence of the central support member 33 due to its own weight and the like is eliminated, and the central support member 33 is arranged at a desired position. And by arrange | positioning in the position 44 and 45 between the planar bodies 20, when the case 10 is opened, the planar body 20 is fully expanded and formed in predetermined paraboloid shape. It is desirable that the connecting members 44 and 45 disposed at a position between the planar body 20 are separated from the outer edge support members 31 and 32 and the center support member 33 and dispersed. Note that a rigid rod-like body may be appropriately laid on the connecting member 40 in addition to a flexible linear body such as yarns.

  When the bottom lid 12 of the case 10 is grounded and the upper lid 11 is opened at a predetermined angle, the outer edge support members 31 and 32 are expanded by the tension adjustment by the plurality of connecting members 40, and the surface shape The entire surface of the body 20 is expanded to form a parabolic shape. In addition, by using the rigid center part support member 33, the shape of the center part of the planar body 20 is accurately formed on the paraboloid.

  The planar body 20 is erected on the inner side of the case 10 via a connecting member 40. There is no need for a member that supports the planar body 20 other than the connecting member 40 and the case 10, and if only the grounding angle and orientation of the bottom cover 12 are adjusted, the member can be used as an antenna.

  A support rod 52 that supports a power feeding unit 51 (primary radiator) that transmits and receives the propagation received and reflected by the planar body 20 is attached to the bottom lid 12 of the case 10 so as to be bent with respect to the bottom lid 12. Has been. When the case 10 is opened, the support bar 52 stands, and the power supply portion 51 at the tip thereof is disposed at the focal point of the planar body 20. Note that when the case 10 is opened, the power feeding portion 51 and the support rod 52 are also appropriately bent and stored in the case 10.

When the case 10 is opened, the planar body 20 relaxes but is guided to the inside of the case 10 because it is connected to the connecting member 40. Since the outer edge support members 31 and 32 and the center support member 33 are planar, the case 10 can be thin and rich in transportability.
JP 2003-8340 A

The conventional example has the following problems.

  a: In the conventional antenna, a flexible conductive mesh material is used as a material for the reflector, and the reflector is pulled with a thread. The shape changes and it is difficult to maintain mirror accuracy. Furthermore, it is difficult to maintain the mirror surface accuracy due to pulling with a thread and a head wind against the mirror surface.

  b: Since there was no waterproofing measure before the mirror surface, it could not be used outdoors in rainy weather.

  c: Since a single support rod is used to fix the feeding antenna (primary radiator), it is easily affected by wind and it is difficult to always keep the position of the feeding portion. Accordingly, the position of the power feeding unit, that is, the position of the focal point where the radio wave concentrates in one place is shifted, and loss due to the shift occurs.

  The present invention solves such a conventional problem and can maintain the same mirror surface accuracy even when folded several times or opened, and by taking waterproof and windproof measures that reduce the influence of rain, wind, etc. The primary radiator can be always kept in an accurate position without being affected by wind or the like, and the loss due to the deviation of the primary radiator is eliminated.

In order to achieve the above object, the present invention is configured as follows.

(1): In a portable deployable antenna that can be folded and unfolded and transported, a case body that houses the antenna components, and a conductive surface that has a curved surface with a predetermined shape when unfolded, with one side of the curved surface serving as a mirror surface A reflecting mirror made of a cloth , a reflecting mirror holder that holds the reflecting mirror and is rotatable about the axis of the case body, and is attached to the rear side of the reflecting mirror, and both ends thereof are A plurality of frames held by the reflecting mirror holder, and a resin that passes through the radio waves fixed to the reflecting mirror holder so as to cover substantially the entire mirror surface on the front side of the reflecting mirror without loss. A plate, a primary radiator mounting hole that is provided in the resin plate and passes through the resin plate to mount the primary radiator, and is rotatably provided in the case body, and is engaged with the resin plate when deployed. The position of the reflector Was fixed in position, wherein the antenna component comprises at least an antenna cover covering the upper side thereof in a state of accommodating the Rutotomoni, both ends of the plurality of frames in order to perform freely expand and folding operation of the reflector The reflection mirror is supported by the rotation support mechanism so as to be rotatable and unfoldable by rotating around both ends of the plurality of frames .

(2) : In the portable deployable antenna of (1) , the resin plate is configured to be foldable by combining two resin plates, and the periphery of the reflector is fixed to the two resin plates with screws. It is characterized by being.

(3) : In the portable deployable antenna of (1) or (2) , when the primary radiator is installed in the primary radiator mounting hole, almost the entire mirror surface of the reflector is covered with the resin plate. It is characterized by realizing a waterproof and windproof structure of the mirror surface of the reflector.

(4) : In the portable deployable antenna according to any one of (1) to (3) , at least a housing portion of a primary radiator and a housing portion of a diplexer are provided inside the case body. Features.

(5) : In the portable deployable antenna according to any one of (1) to (4) , a plurality of elevation angle adjusting screws are provided at the bottom of the case body, and the elevation angle adjusting screws are adjusted. The elevation angle of the developed reflecting mirror can be arbitrarily adjusted.

(6) : In the portable deployable antenna of (1), the reflecting mirror is made of a conductive cloth having a conductive solid surface .

The present invention has the following effects by the above configuration.

  a: Since a parabolic mirror surface is realized by attaching a plurality of frames to the rear side of the reflecting mirror, the same mirror surface accuracy can be maintained even when folded several times or opened compared to the conventional example.

  b: Since a resin plate that allows radio waves to pass through without loss is provided in front of the mirror surface of the reflector, it provides a practically sufficient waterproof and windproof measure compared to conventional antennas, reducing the effects of wind and rain. Can be used outdoors.

  c: Since the reflector is fixed to the resin plate that allows radio waves to pass through without loss, it is less affected by wind and the primary radiator can always be kept in the correct position. Loss due to

  e: The resin plate is configured to be foldable by combining two resin plates, and the periphery of the reflecting mirror is fixed to the two resin plates with screws. Therefore, folding and unfolding can be easily performed, and the shape of the reflecting mirror can be maintained with high accuracy even when the unfolding and unfolding are repeated, and the waterproof and windproof structure can be maintained as it is.

  f: Since the housing part of the primary radiator and the housing part of the diplexer are provided at least inside the case main body, the antenna components can be easily housed and reduced in size, and can be easily folded and unfolded.

  g: A plurality of elevation angle adjusting screws are provided at the bottom of the case body, and the elevation angle of the deployed reflecting mirror can be arbitrarily adjusted by adjusting the elevation angle adjusting screws. Therefore, the elevation angle of the reflecting mirror can be arbitrarily and easily adjusted even if the installation location of the portable deployable antenna is somewhat bad.

h: Since the reflecting mirror is made of a conductive cloth having a conductive solid surface , it is difficult for radio waves to pass through compared to the conventional reflector made of mesh material, and can be used in a high frequency band. .

  i: Both ends of the frame are attached to a rotatable rotating support mechanism for freely unfolding and folding the reflecting mirror, and the reflecting mirror is rotated about the both ends of the frame by the rotating support mechanism and deployed. And is foldably supported. Therefore, folding and unfolding can be performed very easily, and the unfolded shape of the reflecting mirror can be maintained with high accuracy even when folding and unfolding is repeated, and the waterproof and windproof structure can be maintained as it is.

§1: Outline of portable deployable antenna: see FIGS. 1 to 4 FIG. 1 is a perspective view of the portable deployable antenna, FIG. 2 is an external view of the portable deployable antenna, and FIG. FIG. 2 is a side view seen from the direction, FIG. B is a plan view of FIG. 1, and FIG. C is a side view seen from the Y direction of FIG. FIG. 3 is a plan view of the portable deployable antenna with the antenna cover removed. The outline of the portable deployable antenna will be described below with reference to FIGS.

  The appearance of this portable deployable antenna is shown in FIG. 1 and FIG. 2, and FIG. 1 shows the whole as a perspective view, and FIG. 2 shows the appearance seen from each direction (X, Y, top surface) of FIG. Yes. As shown in these drawings, the portable deployable antenna is provided with a case main body 1 and an antenna cover 2 that covers the case main body 1, and a handle is provided on a part of the antenna cover 2 so that a person can easily hold it by hand. (Or knob) 3 is provided.

  The antenna cover 2 is attached to a part of the case body 1 so as to be rotatable with respect to the case body 1 by a hinge 4 (see FIG. 2). The case body 1 is made of a resin material (for example, ABS resin), and the antenna cover 2 is made of an aluminum material to reduce the weight (however, the case body 1 and the antenna cover 2 are made). The material can also be made of other materials).

  Further, as shown in FIG. 2, a part of the case body 1 is provided with a handle 7 for a person to carry with a portable deployable antenna, and two hinges 4 are provided on both sides thereof. The antenna cover 2 is rotatably attached to the case main body 1 by the two hinges 4. In addition, a transmission / reception connector 5 for connecting to an external device is provided on the periphery of the handle 7.

  As shown in FIG. 3, when the antenna cover 2 is removed, the reflector 14 is housed in the case body 1 in a state of being folded in half. Further, inside the case body 1, the primary radiator 6 is accommodated in the primary radiator accommodating portion 29, and the diplexer 8 is accommodated in the accommodating portion. The primary radiator 6 is removed from the place of use and stored, but the position of the diplexer 8 is fixed because it does not move within the case body 1.

§2: Explanation at the time of deployment of the portable deployable antenna FIG. 4 shows a diagram in the case of deploying the portable deployable antenna having the above-described structure. Hereinafter, the deployment operation and the like of the portable deployment antenna will be described with reference to FIG.

  First, the case main body 1 is installed at a predetermined installation location such as the ground from the antenna storage state shown in FIGS. 1 to 3, and the antenna cover 2 is manually opened by picking the handle 3 provided on the antenna cover 2. . In this case, the antenna cover 2 rotates around the hinge 4 as shown in FIG. 4A.

  Next, the reflector holder 15 is manually opened to the side opposite to the antenna cover 2. In this case, the reflecting mirror holder 15 rotates around the shaft 16 fixed to the case main body 1, opens to a substantially right angle direction with respect to the case main body 1 and stops, and the state shown in FIG. At this time, two conductive resin plates 13 are fixed to the reflector holder 15, and the reflector 14 held and attached by a number of frames 9 is fixed to the resin plate 13. Therefore, the reflecting mirrors 14 attached to the large number of frames 9 are unfolded with the rotating operation of the reflecting mirror holder 15.

  Next, in order to set the reflecting mirror 14 to the elevation angle in the use state, it is returned to the inclined state as shown in FIG. 4C, and the tip of the resin plate 13 is attached to the holding member 12 provided at the tip of the antenna cover 2. Secure and keep in use. In this case, since the holding member 12 is provided with two holding pieces at predetermined intervals, the resin plate 13 and the antenna cover 2 can be obtained by inserting the tip of the antenna cover 2 into the gap between the two holding pieces. Are engaged and fixed. In this manner, the reflection angle 14 of the portable deployable antenna is set to an elevation angle suitable for communication with the artificial satellite, and communication is possible with the direction of the portable deployable antenna adjusted. .

§3: Description of Detailed Structure of Portable Deployable Antenna Hereinafter, based on FIGS. 5 to 12 {Explanatory diagrams (No. 1) to (Part 8) of the detailed structure of the portable deployable antenna}, the portable deployable antenna is used. The detailed structure of will be described.

  First, FIG. 5 shows a detailed view of the state of FIG. 4B from another angle. As is apparent from this figure, the reflector holder 15 is fixed to the end of the case body 1 so as to be rotatable with respect to the shaft 16. A resin plate 13 (combined with two resin plates) is fixed to the reflector holder 15, and a metal (in this example, aluminum) frame 9 is attached to the resin plate 13. The reflecting mirror 14 is fixed.

  In this case, the reflecting mirror 14 is composed of a conductive cloth, and the inner surface of the reflecting mirror 14 (the back side is shown in FIG. 5) is secured by fixing the conductive cloth to a large number of frames 9. A parabolic mirror surface (a parabolic mirror surface) is used. FIG. 6 shows the reflecting mirror 14 portion of FIG. 5 in more detail.

  6A is a view when the reflecting mirror surface (back side) is viewed from the side, and FIG. 6B is a view when the reflecting mirror surface is viewed from behind. As shown in FIG. 6, a large number of frames 9 are made of a metal frame such as aluminum, and each frame 9 is supported on the back side so that the inner surface of the reflecting mirror 14 becomes a parabolic surface. Is bent in a curved line. Then, both ends of the frame 9 are collected almost at one place, and are engaged and held in a rotatable state near the tip of the reflector holder 15.

  The structure of the engagement holding means in the vicinity of both ends of the frame 9 is shown in detail in FIG. As shown in FIG. 7, in order to fix a large number of frames 9 in a rotatable manner, shaft members 17 for rotatably engaging and holding the reflector holder 15 are provided at both ends of each frame 9. The frame member 18 is engaged and held on the shaft member 17, and a hook portion 19 is formed.

  Moreover, the recessed part 20 is each formed in the both ends of each flame | frame 9, This recessed part 20 is hooked on the said hook part 19, and is fixed rotatably. The frame member 18 engages and holds one of the multiple frames 9 so as not to come out. In this way, a large number of frames 9 can be rotatably engaged and fixed (rotatably fixed).

  In the configuration shown in FIG. 7, the portion including the shaft member 17, the frame member 18, the hooking portion 19, and the concave portion 20 constitutes a reflecting mirror unfolding / folding mechanism. In this case, both ends of the frame 9 are attached to a reflecting mirror unfolding / folding mechanism for freely unfolding and folding the reflecting mirror 14, and the reflecting mirror 14 is attached to the frame 9 by the reflecting mirror unfolding / folding mechanism. It is supported so that it can be unfolded and folded.

  Next, FIG. 8 shows the diagram shown in FIG. 4C viewed from another angle. In this state, the reflecting mirror 14 can be fixed at a desired elevation angle. At this time, the tip of the antenna cover 2 is held at a holding member 12 (between two holding pieces fixed at a predetermined interval) provided at the tip of the resin plate 13 and fixed at a predetermined elevation angle.

  In order to put the portable deployable antenna into a use state in such a state, the operation is performed as shown in FIG.

  In this case, the periphery of the reflecting mirror 14 is fixed to the resin plate 13 by a number of fixing screws 21. A primary radiator mounting hole 23 is provided through the resin plate 13 at a substantially central portion of the resin plate 13 in which the two resin plates are foldably joined. Therefore, the primary radiator 6 is taken out from the primary radiator housing portion 29 in the case body 1 and attached to the primary radiator mounting hole 23. This state is shown in detail in FIG.

  In FIG. 10A, a primary radiator mounting hole 23 is provided in a substantially central portion of the resin plate 13, and a number of screw holes 24 are provided in the peripheral portion thereof. Therefore, when the primary radiator 6 is attached to the primary radiator attachment hole 23, first, the primary radiator 6 is taken out from the primary radiator housing portion 29 of the case body 1, and the primary radiator 6 is inserted into the primary radiator attachment hole 23. insert. Then, the screw 25 is inserted into the screw hole 24 provided in the primary radiator 6 and fixed by screwing into the primary radiator mounting hole 23.

  Next, the primary radiator 6 and the diplexer 8 housed in the case main body 1 are connected by the coaxial cable 27 to obtain the state shown in FIG. 10B. FIG. 11 shows a view of this state from another angle. FIG. 11A is a view seen from the resin plate 13 side, and FIG. 11B is a view seen from the side surface thereof. As can be seen from these figures, the coaxial cable 27 is provided so as to reduce the influence on the reflecting mirror 14. FIG. 12 shows the connection state between the primary radiator 6 and the diplexer 8 by the coaxial cable 27 in more detail.

§4: Description of manufacturing process of reflecting mirror FIG. 13 is an explanatory diagram of the manufacturing process of the reflecting mirror. Hereinafter, the manufacturing process of the reflecting mirror will be described with reference to this figure.

  The shape of the reflecting mirror 14 is held by a number of frames 9. In this case, the frame 9 has a bag-like hole into which the frame 9 can be inserted in the reflecting mirror 14 made of a conductive cloth, and the frame 9 is inserted and held in the bag-like hole. The example shown in FIG. 13 is an example in which the cross-sectional shape of the frame 9 and the diameter of the reflecting mirror 14 are set as shown. In this example, the cross-sectional shape of the frame 9 is rectangular and has a thickness of 2 mm and a width of 6 mm. The diameter of the reflecting mirror 14 is 350 mm. This example is an example, and other dimensions may be used depending on the purpose of use.

  In this case, the conductive cloth constituting the reflecting mirror 14 is divided and cut into a plurality of divided pieces (which are “multiple mirror surfaces” (two sets of A, B, and C). A plurality of mirror surfaces are stitched together to manufacture the entire mirror surface of the reflecting mirror 14. In this case, a bag-like hole through which the frame passes is formed in one cloth piece A from the outer peripheral side toward the center side.

  Next, the cloth pieces A and B are stitched together to form a bag-like portion (hole) through which the frame passes. Next, the cloth pieces B and C are stitched together to form a bag-like portion (hole) through which the frame passes. Next, another piece of cloth C and piece C are stitched together to form a bag-like portion (hole) through which the frame passes. The reflecting mirror 14 is manufactured by such a manufacturing process.

§5: Description when the portable deployable antenna is stored FIGS. 14 to 16 are explanatory views (No. 1) to (No. 3) when the portable deployable antenna is stored. Hereinafter, the portable deployment antenna will be described with reference to FIGS. 14 to 16.

  When the portable deployable antenna is housed from the unfolded state shown in FIG. 4C to the states shown in FIGS. 1 and 2, the following is performed.

  First, as shown in FIG. 14, the coaxial cable 27 is removed, the primary radiator 6 is further removed, and the primary radiator 6 is accommodated in the primary radiator accommodating portion 29 in the case body 1. Next, as shown in FIG. 15, the holding state of the resin plate 13 and the antenna cover 2 is manually released to separate them, and the reflecting mirror 14 is folded and stored while the antenna cover 2 is standing. Next, as shown in FIG. 16, the reflector holder 15 is housed in the case main body 1, and then the antenna cover 2 is also folded toward the case main body 1 to close the antenna cover 2. In this state, the state returns to the state shown in FIGS. 1 and 2 and becomes portable.

§6: Description of required characteristics of portable deployable antenna The required characteristics of the portable deployable antenna are as follows.

(1): Required antenna performance (assumed value based on circuit design example)
For example, the portable deployable antenna is a technical test satellite scheduled to be launched in AD 2004

を用いて、携帯及び可搬型地球局などにより高速データ衛星通信実験を行う予定である。そして、前記可搬型展開アンテナは前記技術試験衛星を用いた高速データ通信実験に使用する可搬型地球局のアンテナとして設計されている。要求されるアンテナ性能は次の通りである。

Will be used to conduct high-speed data satellite communication experiments using portable and portable earth stations. The portable deployable antenna is designed as a portable earth station antenna used for high-speed data communication experiments using the technical test satellite. The required antenna performance is as follows.

a: Frequency band transmission: 2657.5 ± 2.5MH _Z, reception: 2502.5 ± 20MH _Z
b: Gain of 12 dBi or more (to ensure a transmission rate of 1 Mbps in line design)
c: Others Both transmission and reception are left-handed circularly polarized waves.

(2): Antenna pattern The radiation patterns in the frequency band are shown in FIGS. 17 to 22 {Explanatory diagrams of required antenna performance (No. 1) to (No. 6)}. The antenna patterns shown in these figures are data obtained by actual measurement using the portable deployable antenna in order to ascertain whether or not the portable deployable antenna is operating within the required frequency band. 17 to 22, the horizontal axis represents angle (deg), and the vertical axis represents magnitude (dB).

Figure 17 is the radiation pattern in the frequency 2482.5MH _Z, the radiation pattern in FIG. 18 the radiation pattern in the frequency 2502.5MH _Z, the radiation pattern in FIG. 19 is the frequency 2522.5MH _Z, FIG. 20 is the frequency 2655MH _Z, Figure 21 is the radiation pattern in the frequency 2657.5MH _Z, Fig. 22 shows the radiation pattern in the frequency 2660MH _Z. From these measured radiation patterns, it was confirmed that the portable deployable antenna was operating within the required frequency band.

§7: Description of another example of the portable deployable antenna FIG. 23 is a diagram illustrating another example of the portable deployable antenna. In this example, the elevation angle of the deployed portable deployable antenna can be arbitrarily adjusted. This example is an example in which an elevation angle adjusting mechanism is added to the portable deployable antenna described with reference to FIGS. 1 to 22, and portions other than the elevation angle adjuster are the same as those of the portable deployable antenna described with reference to FIGS. The same.

  As shown in FIG. 23, as the elevation angle adjusting mechanism, elevation angle adjusting screws 28 are provided in the four corners of the bottom portion of the case body 1 so as to be screwable, and portable by adjusting these elevation angle adjusting screws 28 The elevation angle of the deployable antenna can be adjusted arbitrarily. Note that the present invention can be realized even if the elevation angle can be adjusted by a similar mechanism other than the elevation angle adjusting screw 28.

§8: Other explanation
(1): In the above example, the frame 9 has been described with reference to an example using a metal material such as aluminum, but other materials can also be used. For example, it is possible to use a hard, light and strong resin as in the case of aluminum.

  (2): As a material of the reflecting mirror 14, a material made of a mesh material as in the conventional example is excluded, but other materials such as a conductive flexible cloth (a cloth having a solid surface) may be used. Is possible.

  (3): The number of frames 9 used has been described with respect to seven examples, but can be realized with any other number.

  (4): The antenna cover 2 has been described with an example made of aluminum. However, the present invention is not limited to such an example, and the antenna cover 2 can also be realized by using other similar materials.

(1): Required characteristics and their characteristics This portable deployable antenna is composed of a cloth reflector having a diameter of 350 mm, a primary radiator of a microstrip patch antenna, and a diplexer. The reflecting mirror is made of a flexible conductive cloth such as cloth, and seven metal frames are fixed to the circumference and back surface of the reflecting mirror to form a parabolic surface. A plate made of ABS resin that is slightly larger than the size of the opening surface of the reflecting mirror is attached, and a hole with a diameter of 61.2 mm is provided at the center of the plate so that the primary radiator is attached. A hinge is used on both sides of the center of the reflector to store and unfold the reflector.

Conductive fabric thickness 0.15 mm, surface density 80 g / m ^2, the return loss at 2.5GH _Z is -0.03DB, is to substantially totally reflect the radio waves. By using such a conductive cloth, the reflecting mirror can be easily folded thinly.

  The primary radiator can be stored lightly and easily. It uses a single-point-feed circular patch antenna loaded with a perturbation element. The parasitic element is mounted at a height of 12 mm from the feeding patch. The radius of the feeding patch is 20.9 mm and the radius of the parasitic patch is 18.45 mm. is there. The substrate has a radius of 29.5 mm, a dielectric constant of 2.6, and a thickness of 1.7 mm for both patches. The primary radiator was surrounded by ABS resin on the ground surface side of the patch, and was attached at a position 87.5 mm away from the center of the mirror surface so as to be a 90 deg opening.

The size of the diplexer 200 mm × 63 mm, with respect to the passband center frequency, transmission ± 15 mH _Z, received ± 25MH _Z, isolation is more 70 dB.

(2): Frequency characteristics required when using the antenna characteristics the portable deployable antenna communicates experiments with the engineering test satellite transmission (Tx) is 2657.5MH _Z ± 2.5MH _Z, receiving ( in rx) is 2502.5 ± 20MH _Z, request gain is required than gain 12dBi to ensure the transmission speed of 1Mbps on line design. It can be seen that the following antenna performance specifications satisfy the required performance.

(Antenna performance specifications)
Frequency band Tx: 2657.5 ± 2.5MH _Z
Rx: 2502.5 ± 20MH _Z
Standing wave ratio 1.5 or less Axial ratio 2 dB or less Gain Tx: 13.78 dBi, Rx: 13.69 dBi
(At the end of the diplexer)

It is a perspective view of the portable deployment antenna in the best mode for carrying out the invention. 1 is an external view of a portable deployable antenna in the best mode for carrying out the invention. It is a top view of the portable deployment antenna in the state where the antenna cover in the best mode for carrying out the invention was removed. It is explanatory drawing at the time of expansion | deployment of the portable expansion | deployment antenna in the best form for implementing invention. It is explanatory drawing (the 1) of the detailed structure of the portable deployment antenna in the best form for inventing. It is explanatory drawing (the 2) of the detailed structure of the portable expansion | deployment antenna in the best form for implementing invention. It is explanatory drawing (the 3) of the detailed structure of the portable expansion | deployment antenna in the best form for implementing invention. It is explanatory drawing (the 4) of the detailed structure of the portable expansion | deployment antenna in the best form for implementing invention. It is explanatory drawing (the 5) of the detailed structure of the portable expansion | deployment antenna in the best form for implementing invention. It is explanatory drawing (the 6) of the detailed structure of the portable expansion | deployment antenna in the best form for implementing invention. It is explanatory drawing (the 7) of the detailed structure of the portable expansion | deployment antenna in the best form for implementing invention. It is explanatory drawing (the 8) of the detailed structure of the portable deployment antenna in the best form for implementing invention. It is manufacturing process explanatory drawing of the reflective mirror in the best form for inventing. It is explanatory drawing (the 1) at the time of portable portable antenna accommodation in the best form for implementing invention. It is explanatory drawing (the 2) at the time of portable portable antenna accommodation in the best form for implementing invention. It is explanatory drawing (the 3) at the time of portable portable antenna accommodation in the best form for implementing invention. It is explanatory drawing (the 1) of the required antenna performance in the best form for implementing invention. It is explanatory drawing (the 2) of the required antenna performance in the best form for implementing invention. It is explanatory drawing (the 3) of the required antenna performance in the best form for implementing invention. It is explanatory drawing (the 4) of the required antenna performance in the best form for implementing invention. It is explanatory drawing (the 5) of the antenna performance requested | required in the best form for implementing invention. It is explanatory drawing (the 6) of the required antenna performance in the best form for implementing invention. It is another example of the portable deployment antenna in the best mode for carrying out the invention. It is explanatory drawing (the 1) of a prior art example. It is explanatory drawing (the 2) of a prior art example. It is explanatory drawing (the 3) of a prior art example. It is explanatory drawing (the 4) of a prior art example.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Case main body 2 Antenna cover 3, 7 Handle 4 Hinge 5 Transmission / reception connector 6 Primary radiator 8 Diplexer 9 Frame 10 Hinge part 12 Holding member 13 Resin plate 14 Reflective mirror 15 Reflective mirror holder 16 Shaft 17 Shaft member 18 Frame member 19 Hook Part 20 Concave part 21 Fixing screw 23 Primary radiator mounting hole 24 Screw hole 25 Screw 27 Coaxial cable 28 Elevation angle adjusting screw 29 Primary radiator housing part

Claims (6)

In a portable deployment antenna that can be folded and unfolded and transported,
A case body for storing antenna components;
A reflecting mirror composed of a conductive cloth that becomes a curved surface of a predetermined shape when deployed, and one side of the curved surface is a mirror surface;
A reflector holder that holds the reflector and is provided rotatably about the axis of the case body;
A plurality of frames attached to the back side of the reflecting mirror and having both ends thereof held by the reflecting mirror holder;
A resin plate on the front side of the mirror surface of the reflecting mirror and passing through the radio wave fixed to the reflecting mirror holder so as to cover almost the entire mirror surface without loss;
A primary radiator mounting hole provided in the resin plate, for attaching the primary radiator through the resin plate;
At least an antenna cover that is rotatably provided on the case body, engages with the resin plate when deployed, fixes the position of the reflecting mirror to a predetermined position, and covers the antenna component in a state where the antenna component is housed. And
Both ends of the plurality of frames are attached to a rotatable rotation support mechanism for freely performing the unfolding and folding operations of the reflecting mirror,
The portable deployable antenna , wherein the reflector is supported by the rotation support mechanism so as to be rotatable and unfoldable by rotating around both ends of the plurality of frames . 2. The portable type according to claim 1, wherein the resin plate is configured to be foldable by combining two resin plates, and the reflection mirror has a periphery fixed to the two resin plates with screws. Deployment antenna. When the primary radiator is installed in the primary radiator mounting hole, a waterproof and windproof structure of the reflector mirror surface is realized by configuring so that almost the entire mirror surface of the reflector is covered with the resin plate. The portable deployable antenna according to claim 1 or 2 . The inside of the case body, a primary radiator housing portion for housing the primary radiator, according to any one of claims 1 to 3, characterized in that accommodating portion for accommodating the diplexer is provided Portable deployable antenna. A plurality of elevation adjustment screw at a plurality of positions of the bottom of the case body, according to claim 1 to 4, characterized in that the arbitrarily adjustable arrangement the elevation angle of expanded reflector by adjusting the elevation angle adjustment screw The portable deployable antenna according to any one of the above. The portable deployable antenna according to claim 1 , wherein the reflecting mirror is made of a conductive cloth having a conductive solid surface .

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