KR970002728B1 - Microwave antenna - Google Patents

Abstract

None.

Description

Microwave antenna

1 is a plan view showing the melt of an embodiment of the antenna of the present invention.

2 is a cross-sectional view taken along the line III-III of FIG.

3A to 3C are process drawings of press working of the upper plate and the lower plate used in the antenna of the present invention.

4A and 4B are a plan view and a sectional view of a circularly polarized radiating element used in the antenna of the present invention.

5 is a cross-sectional view of a suspended line used in the antenna of the present invention.

6 and 7 are characteristic diagrams of circularly polarized radiating elements used in the antenna of the present invention.

8A to 8C are rear and cross-sectional views showing the configuration of the periphery of the power feeding portion of the antenna of the present invention.

9 is an assembly process diagram of the periphery of the power supply unit of the antenna of the present invention.

10A and 10B are side cross-sectional and rear views showing the overall configuration of an antenna of the present invention.

11 is an assembly view showing a configuration for mounting the antenna body of the present invention to the back cover.

12 is a plan view showing one example of a lower plate used in the antenna of the present invention.

13A and 13B are assembly views showing another example of the configuration in which the antenna body of the present invention is mounted on the back cover.

14 is an assembly view showing an example of the configuration for mounting the back cover of the antenna of the present invention to the pole.

Figure 15 is a perspective view showing an example of mounting the back cover of the antenna of the present invention to the pole.

FIG. 16 is an explanatory diagram illustrating adjustment of an elevation angle of an antenna of the present invention. FIG.

17 is an explanatory diagram for installing a pole of an antenna of the present invention.

18 is an assembly view showing another example of the structure for supporting the substrate of the antenna of the present invention.

19 is a cross-sectional view of relevant parts of the antenna of the present invention shown in FIG.

20 is a plan view of the spacer shown in FIG. 18;

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a planar array type microwave antenna suitable for use, for example, when receiving satellite broadcasts, and more particularly to a microwave antenna structure.

Conventionally, in a suspended line feed type planar antenna which sandwiches a substrate with a metal or metallized plastic plate having a plurality of holes forming a part of a radiating element, a pair of aftershocks orthogonal to each other corresponding to the plurality of holes Iii) A circularly polarized planar array antenna is proposed in which a probe is formed on a common plane and phase-synthesized a feed signal to a pair of excitation probes in a suspended line (the inventor of the present invention of July 22, 1986) Patent Application No. 888,117 and United States Patent Application No. 058,286 dated June 4, 1987).

This makes it possible to reduce the thickness, simplify the mechanical configuration, and obtain an antenna gain equivalent to or higher than that of using an expensive microstripline substrate even if a substrate generally available at low cost for high frequency is used. .

In addition, the suspended line is advantageous in that a low loss line can be formed as a power feeding circuit of a planar antenna, and can be formed in an inexpensive film type substrate, and a circular or rectangular waveguide opening element is used as a radiating element. It is possible to configure an array antenna having a small gain deviation over a wide bandwidth.

On the other hand, as a means of thinning, a so-called patch type microstripline antenna utilizing the characteristics and advantages of the suspended line and using a thin radiating element to realize high efficiency and wide bandwidth, and at the same time achieve thin and light weight simultaneously. Is proposed in the United States Patent Application No. 223,781 of July 25, 1988.

The planar antenna is a suspended line-feeding planar array antenna in which a substrate is sandwiched by a pair of metal or metallized plastic plates. The planar antenna is formed on a substrate corresponding to a hole formed in one side of the metal or metallized plastic sheet. It is comprised so that a resonator-type printed element may be arrange | positioned.

However, the planar array antennas described in US Patent Application No. 233,781 and the like of the present inventors have flanges serving as support portions around a plurality of planar resonator-type printed elements and the like, so that cutting is required at the manufacturing stage. As a result, there were disadvantages such as poor productivity and high cost.

It is therefore an object of the present invention to provide an improved planar array antenna.

Another object of the present invention is to provide a planar array antenna that can efficiently improve mass productivity.

It is still another object of the present invention to provide a planar array antenna that can reduce the cost.

According to one aspect of the present invention, there is provided a substrate sandwiched between an upper plate and a lower plate, the upper plate having a plurality of holes forming a radiating element, and a corresponding plurality of holes formed in the substrate, respectively aligned with the holes. The upper and lower plates, which are formed of a radiating element and a feeding part feeding the radiating element, and formed of a flat plate without protrusions, are press-processed at corresponding multiple positions of the upper and lower plates by deforming a part of the upper and lower plates. Suspending lines supported by the protrusions that occupy a small portion of the surface of the upper and lower plates by forming protrusions and disposing the protrusions between the upper plate and the substrate and between the lower plate and the substrate. Provides a feed planar antenna.

According to another aspect of the present invention, there is provided a substrate sandwiched between an upper plate and a lower plate, the upper plate having a plurality of spaced holes forming a radiating element, and a corresponding plurality formed in the substrate, each aligned with the hole. A radiating element, a feeding part feeding power to the radiating element, the feeding part passing through the upper and lower plates and the substrate to support the input waveguide, the output waveguide, and the input and output waveguides. It provides a suspended line feed type planar antenna made of a support means having a.

According to another aspect of the present invention, there is provided a substrate sandwiched between an upper plate and a lower plate, the upper plate having a plurality of holes forming a radiating element, and a corresponding plurality of radiations formed in the substrate, respectively aligned with the holes. An element, a feeding part for feeding the radiating element, a radome and a rear cover surrounding the upper and lower plates, and the rear cover has a plurality of supporting members formed on an inner surface thereof, the position corresponding to the supporting member. A plurality of holes are formed in the upper and lower plates of the substrate and the substrate, and the suspended plate-feeding flat antenna is supported by the support member through the corresponding plurality of holes.

According to another aspect of the present invention, there is provided a substrate sandwiched between an upper plate and a lower plate, a back cover surrounding the upper and lower plates, the upper plate having a plurality of holes forming a radiating element, and the holes, respectively. A plurality of corresponding radiating elements arranged on the substrate in alignment with each other, a feeding portion for feeding the radiating elements, and supporting means, the supporting means comprising: a pole having an upper portion inclined with respect to a vertical line, and the inclined upper portion A mounting means including a first through hole disposed above the first through hole, a first bolt passing through the first through hole for mounting the back cover to the pole, and for adjusting the elevation angle of the back cover. Suspended-line feed type planar array antenna comprising a second bolt through the second through hole and an adjusting means including the second through hole. The ball.

According to another aspect of the present invention, there is provided a substrate sandwiched between an upper plate and a lower plate, the upper plate having a plurality of holes forming a radiating element, and a corresponding plurality of radiations formed in the substrate, respectively aligned with the holes. A first insulating spacer having an element, a feeding portion for feeding the radiating element, a corresponding plurality of holes inserted between the upper plate and the substrate, and a corresponding plurality inserted between the substrate and the lower plate. Provided is a suspended line feed planar antenna comprising a second spacer having a hole.

These and other objects, features and advantages of the present invention will become apparent from the following detailed description of the preferred embodiments in conjunction with the accompanying drawings, in which like reference characters designate the same elements and parts.

Next, an embodiment of a planar array antenna according to the present invention will be described in detail with reference to FIGS.

First, the circularly polarized radiating element and the suspended line used in the present invention will be described with reference to FIGS. 4 to 7. 4A and 4B show the configuration of the circularly polarized radiating element used in the present invention. FIG. 4A is a plan view thereof, and FIG. 4B is a cross-sectional view cut along the lines I to I in FIG. 4A. 4A and 4B, (1) is a first metal plate (or metallized plastic plate) as a lower plate, (2) is a second metal plate (or metallized plastic plate) as an upper plate, (3) is a thin film substrate (film flexible substrate) sandwiched by the first and second metal plates 1, 2. The first metal plate 1 has a convex protrusion 30 (FIG. 1, FIG. 2) for supporting the substrate 3, and the second metal plate 2 is shown in FIG. 4A. As shown in Fig. 2, for example, a hole having a diameter of 14 mm, a so-called slot-shaped hole 5, and a convex protrusion 31 (FIG. 2) formed in the vicinity to support the substrate 3, are provided. The projections 30 and 31 are positioned to coincide with each other when the substrate 3 is sandwiched with the first and second metal plates 1 and 2. And the thickness of the 1st metal plate 1 and the 2nd metal plate 2 at this time becomes very thin, for example, about 2 mm each. Moreover, when the board | substrate 3 is clamped by the 1st metal plate 1 and the 2nd metal plate 2, the cavity 7 which communicates with the hole 5 will be formed.

8A, as shown in FIG. 4A, a conductor foil as a so-called patch-type planar resonant print element deposited concentrically with this hole 5 corresponding to the hole 5 of the second metal plate 2 ( The conductor foil 8 is connected via the cavity 7 to form a suspended line. In this case, the substantially circular conductor foil 8 has a diameter that resonates at a predetermined frequency, and the slit 8a is opposed to a position at a predetermined angle, for example, 45 ° with respect to the suspended line in order to transmit and receive circular polarized waves. And (8b) (FIG. 4A) are formed. As shown in FIG. 4A, the left slit 8a is located at −45 ° from the horizontal and the slit 8b is located at + 45 ° from the horizontal. In this example, when the microwave is transmitted or received from just in front of the surface, the clockwise circular polarization is used. In the counterclockwise circular polarization, the slits 8a and 8b may be disposed on the side opposite to the 45 ° clockwise circular polarization for the suspended line.

FIG. 5 shows the structure of the suspended line which feeds the planar array, and shows the state cut by the line II-II in FIG. 4B. In this embodiment, the conductor foil 8 is formed by etching, i.e., removing unnecessary foil portions, which are conductive films coated on the printed board 3 on the order of 25 to 100 µm, for example. The conductor foil 8 is surrounded by the first and second metal plates 1 and 2 to form a hollow coaxial line. In this case, since the board | substrate 3 is thin and acts only as a support member, it becomes a feed line with a low transmission loss even if it is not a low-touch board. For example, the transmission loss of an open stripline using a Teflon® glass substrate is 4-6 dB / m at 12 GHz, while a 25 μm film substrate is about 2.5-3 dB / m for a suspended line. Since the film type flexible substrate is cheaper than the Teflon glass substrate, there is an advantage including the constituent surface (characteristic).

6 shows the loss versus frequency characteristics of the circularly polarized radiating element used in the present invention. From Fig. 6, the circularly polarized radiating element of the present invention has a good minimum return loss of -30 dB in the 12 GHz band, and -14 dB or less with a bandwidth of about 900 MHz in the device unit (voltage standing wave ratio, VSWR <1.5). The gain is broadband. This is because the height h from the top surface of the first metal plate 1 to the top surface of the substrate 3 is about 1 mm (FIG. 4), and it is known between the first metal plate 1 and the substrate 3. This is because the equivalent relative dielectric constant? Consisting of the relative dielectric constant of the substrate 3 and the substrate 3 can be reduced to about 1.05.

7 is an example of measuring the axial ratio of circular polarization in the present invention, where curve a is one circular polarization radiating element and curve b is four cases. For example, about 1 dB at a frequency of 12 GHz is an acceptable range, but it can be seen that the patch slot flat array antenna according to the present invention satisfies this sufficiently.

1 shows a circuit configuration in which the circularly polarized radiating elements as shown in FIGS. 4A and 4B are fed in phase with a plurality of suspended lines, thereby forming an array. In addition, the solid line part of FIG. 2 has shown the state cut | disconnected by the line III-III in FIG. 1, and the broken line part of FIG. 2 is the 2nd metal plate 2 (FIG. 1 from the upper side in the state of FIG. 1). (Not shown) is shown.

As shown in FIG. 1 and FIG. 2, the projection 30 for supporting the board | substrate 3 is formed in the 1st metal plate 1 so that the conductor foil 8 and the suspended line may be avoided here. Moreover, the protrusion 30 is formed also in the outer peripheral part of the planar array antenna of the 1st metal plate 1. As shown in FIG. The other part constitutes a cavity 7. In this case, the plurality of conductor foils 8 may pass through the same cavity 7, and there is concern about mutual coupling. However, by appropriately selecting the gap between the conductor foils 8 and the upper and lower walls of the cavity 7. The necessary isolation is taken, thus eliminating the risk of mutual coupling described above. At this time, since the electric line of force concentrates on the upper and lower wall sides of the cavity 7, the electric field along the substrate 3 supporting the conductor foil 8 is almost eliminated, thereby reducing the dielectric loss and consequently the transmission loss of the line. This will be reduced.

In addition, the projections 31 and the cavity 7 are also formed in the second metal plate 2 corresponding to the first metal plate 1. That is, the projection 31 for supporting the board | substrate 3 is formed in the vicinity of the hole 5 formed in the 2nd metal plate 2, and the outer peripheral part of an array to avoid the conductor foil 8 and a suspended line, and the projection The other part between them becomes the cavity 7 (FIG. 2).

Since the board | substrate 3 is uniformly supported by the protrusions 30 and 31 formed in this way, it does not bend down, Furthermore, the periphery of each radiation element, a feed part, etc. is the upper and lower metal plates 1, like conventionally, Since (2) is in close contact, resonance or the like at a specific frequency does not occur.

In Fig. 1, sixteen radiating elements are divided into four groups G1 to G4 with four as one set. The connection point P1 of the suspend line of each group is λg / 2 (λg is the line wavelength at the center frequency) from the center, and the connection points P2 and P3 of the suspend line which feeds two radiating elements of each group are respectively two center points. Are connected away from λg / 4. Thus, in each group, the right bottom radiating element is shifted by 90 °, the bottom left radiating element is 180 °, and the top left radiating element is shifted by phase angles, respectively, thereby improving the axial ratio. In other words, the spatial ratio and the feeder phase are changed to achieve wider axial ratios. In another aspect, two vertically or horizontally adjacent patch radiating elements are deviated from each other by 90 degrees.

Moreover, the connection point P1 of each group and the connection points P4 to P6 of the suspended line which feed each group are mutually connected so that it may become equidistant with respect to the feeding point 10 of the power feeding part 9.

In such a configuration, various directing characteristics can be obtained by changing the positions of the connection points P1 and P4 to P6 and changing the power supply phase and the power distribution ratio. That is, the feed phase is changed by changing the distance from the feed point 10 to the connection points P1 and P4 to P6, and the impedance ratio is changed by thinning or thickening the line where the suspended line is branched. The amplitude changes, thereby allowing the directivity to be arbitrarily changed.

FIG. 3 shows a step in the case of forming the projections 31 and the holes 5 in the second metal plate 2 by press working, for example. In FIG. 3a, the flat metal plate 2 is prepared. 3B, the projection 31 is formed by press working (drawing) using a mold (not shown), and the hole 5 is opened by pressing (punching) in FIG. 3C. Form. In the case of the 1st metal plate 1 which is not shown in figure, only the process of FIG. 3B, ie, the process of forming the processus | protrusion 30, is good.

As described above, in the present embodiment, the projections 30 and 31 supporting the substrate 3 are formed by simple press processing, and the cutting process does not need to be used, so that the antenna of the present invention is improved in productivity and cost-effectively. Also becomes inexpensive. In the conventional case, a support such as a flange requires processing precision so as to be accurately positioned around the hole 5 for the radiating element, but unlike the prior art, the projections 30 and 31 of this embodiment are It is only necessary to avoid the conductor foil 8 and the suspended line forming the radiating element, and do not require much processing precision.

Further, as described above, according to the embodiment of the present invention, since the thickness of the radiating element (approximately the thickness of the first metal plate 1 and the second metal plate 2) is about 4 mm, the weight of the antenna according to the present invention About 1.1 kg (40 cm x 40 cm) of this metal, or 0.3-0.5 kg (40 cm x 40 cm) of the metallized plastic by this invention can be made lightweight and thin. In addition, since the first and second metal plates used to constitute the antenna of the present invention are thin in thickness, press working of the metal is possible, mass production is improved, and the antenna of the present invention is light and thin. It is possible to reduce the cost and improve the merchandise. Further, since the equivalent dielectric constant of the present invention can be reduced to 1.05, the gain can be widened.

In addition, since the hole 5 formed in the second metal plate 2 is used as a feed line and the hole 5 formed in the second metal plate 2 is made into a so-called slot type, and the diameter thereof is also reduced to about 14 mm, the element spacing is widened as a result. Since it can be wider, the transmission loss in the line can be reduced. In addition, the gain (efficiency) of the antenna can be increased by widening the gain and reducing the transmission loss.

In the above-described embodiment, the radiating element is mainly described. However, due to the reversible principle of the antenna, the radiating element (or the antenna constituted by the array of radiating elements) does not change its characteristics at all. Of course, it can act as a receiving antenna).

Incidentally, in the above-described embodiment, the shape of the planar resonator type print element has been described taking the case of a circular shape as an example.

Incidentally, in the above-described embodiment, although the case is applied to the frequency band of 12 GHz, the same can be applied to other frequency bands by changing the dimension of the element.

As described above, according to the present invention, the projections formed by press working are arranged at a plurality of corresponding positions of the upper and lower plates, and the substrates are supported by the projections, so that the antenna of the present invention is improved in productivity. It is also cheap.

Although the feed section 9 is formed in the periphery of the antenna main body in FIG. 1, the configuration of the feed section 9 is actually as shown in FIGS. 8A to 8C. FIG. 8A is a rear view thereof, and FIG. 8B is a sectional view taken along the line IV-IV of FIG. 8A, and FIG. 8C is a sectional view taken by the line V-V of FIG. 8A.

In FIGS. 8A and 8B, reference numeral 40 denotes an input waveguide, 41 an output waveguide, and the input waveguide 40 has a flange 42 around it, and is mounted on the flange 42. A plurality of dragon screw holes 43 are formed. The input waveguide 40 is mounted on the upper portion of the converter 44 by, for example, soldering or the like. The converter 44 has flanges 45 extending on both sides in FIG. 8A and forms threaded holes 46 for mounting in these flanges 45, respectively. In addition, an output connector 47 to which a cable (not shown) is connected is disposed on the lower side of the converter 44. It is the back cover 48 which extends below and around the converter 44.

As shown in FIG. 9, mounting holes are formed on both sides (flanges) of the output waveguide 41 so as to face the screw holes 43 of the input waveguide 40, and similarly to the metal plate ( A plurality of holes 50, 51 and 52 are also formed in 1), 2 and substrate 3, respectively. Then, the projecting portion of the output waveguide 41 is press-fitted into the hole 53 formed in the second metal plate 2 so that the input waveguide 40 is opposed to the screw hole 43, 50. ), (52), (49) and (51) insert the screw (54), screw on the self-locking nut (55) disposed on the opposite side, the metal plate (1), (2) and the board (3) In addition, it is integrally mounted with the input waveguide 40 and the output waveguide 41.

The converter 44 also positions the flange 45 to the boss 56 erected from the rear cover 48 (FIG. 8C), and then fixes the flange 45 to the rear cover 48 with screws 57. In the first metal plate 1, holes 58 are formed so that the input waveguide 40 and the output waveguide 41 communicate with each other. The sidewall of the input waveguide 40 also has a hole 60 so that a conversion probe 59 connected to a circuit (not shown) inside the converter 44 can protrude into the input waveguide 40. To form.

As can be seen from FIG. 8A to FIG. 8C, the rear cover 48 is one step higher around the converter 44, so that the converter 44 is dedicated to the portion separately from the rear cover 48. Cover 61 is covered (FIGS. 10A and 10B).

Next, the procedure of assembling the antenna of the present invention will be described with reference to FIG.

9, the self-locking nut 55 is embedded and fixed on the second metal plate 2 so as to fit into the screw hole 51 of the second metal plate 2 first. Next, the protruding portion of the output waveguide 41 is press-fitted into the hole 53 of the second metal plate 2. At this time, the screw holes 49 on both sides of the flange of the output waveguide 41 are matched with the screw holes 51 of the second metal plate 2, respectively.

Next, the first metal plate 1 is placed on the back cover 48, and the substrate 3 is sandwiched by the first metal plate 1 and the second metal plate 2. At this time, the screw holes 49, 52 and 50 are matched with each other. Next, the screw hole 43 of the input waveguide 40 fixed to the converter 44 is fitted to the screw hole 50 of the first metal plate 1 which is viewed from the cutout portion of the back cover 48. Then, the screw 54 is inserted into the screw holes 43, 50, 52, 49, and 51, and is screwed and fixed to the self-locking nut 55. Thus, the input waveguide 40 and the output waveguide 41 are integrally mounted together with the metal plates 1, 2 and the substrate 3. In this mounting step, the input waveguide 40 and the output waveguide 41 of the feed point 10 of the feed section of the substrate 3 are made to correspond.

10A and 10B show a state in which a rear cover 48 and a radome 62 are mounted on a planar array antenna on which the converter 44 is mounted. FIG. 10A is a side cross-sectional view thereof, and FIG. It is the back view. As the back cover 48, for example, a plastic having good weather resistance such as reinforced plastic is used. As the radome 62, for example, a plastic having almost no high frequency attenuation and having good weather resistance is used. A predetermined amount of air gap is formed between the second metal plate 2 of the planar array antenna and the radome 62 to reduce the reflection loss.

Thus, in this embodiment, even if the first metal plate 1 and the second metal plate 2 constituting the antenna are thin, the input waveguide 40 and the output waveguide 41 can be easily used by using the screws 54. And also can be mounted integrally. In addition, since the self-locking nut 55 is substantially embedded in the second metal plate 2 and is fixed in advance, the input waveguide 40 and the output waveguide 41 fit the screw 54 to the nut 55. It can be easily attached with the 1st metal plate 1, the 2nd metal plate 2, and the board | substrate 3 only by putting in.

11 shows an example of a configuration in which the antenna main body is mounted on the back cover 48.

In FIG. 11, the head part of the some bolt 65 is previously planted in the predetermined position of the back cover 48, and the lower plate 1, the board | substrate 3, and the upper plate 2 which are antenna bodies are attached to this. In turn, the protruding end of the bolt 65 is inserted from above, and the flat washer 66 and the spring washer 67 are inserted, and the nut is fixed at the end. Of course, the lower plate 1, the substrate 3 and the upper plate 2 are formed with holes in which a plurality of bolts 65 are inserted in advance.

The number of bolts 65 is 23, for example, a predetermined number, and as shown in FIG. 12, 23 holes 69 are also formed in the lower plate 1 corresponding to the bolts 65, Of course, the same hole is formed in the board | substrate 3 and the upper plate 2, too.

13A and 13B show another example of a configuration in which the antenna body is mounted on the back cover 48.

In the present embodiment, as shown in FIG. 13A, a plurality of bosses 71 are integrally formed with the back cover 48 in this manner. For example, the number of the bosses 71 is 23 as described above. Therefore, the lower plate 1, the board | substrate 3, and the upper plate 2 which comprise an antenna main body are also provided with some hole corresponding to these bosses 71. FIG.

In assembly, the bosses 71 of the rear cover 48 are fitted to the lower plate 1, the substrate 3, and the upper plate 2 constituting the antenna main body, respectively. The boss 71 then protrudes from the antenna body. Therefore, this also uses a plate holder 72 made of, for example, a stainless steel for spring as shown in FIG. 13B so that the antenna main body can be fixed to the back cover 48. It is placed on the top, and the tapping screw 73 is fixed on the boss 71 from above. As a result, the antenna main body is fixed to the rear cover 48. The plate holder 72 may be press-fitted using plastic as the plate holder 72 press-fitted into the boss 71. Thus, when the plate holder 72 is made of a plastic material, the plastic material is not a conductor, so that the directivity of the antenna may not be affected by the holder 72 at all.

In this way, the radome 62 is put on the back cover 48 having the antenna main body incorporated therein to complete the flat array antenna (Fig. 10A).

In the example shown in FIG. 13A, instead of embedding the bolt 65 in the back cover 48, the boss 71 is raised, whereby the productivity of the back cover 48 can be improved. Moreover, workability of assembly improves by fixing by tapping screw 73 instead of a nut, a washer, etc. Moreover, by using the plate holder 72 of a predetermined shape, the height of the boss 71 can be made long enough, and it becomes possible to use the tapping screw 73, and the component score is reduced. In assembly, the self-tapping screw has a Phillips time socket head, thereby increasing the productivity of the line.

14 is an exploded perspective view of the configuration in which the back cover 48 is mounted on the pawl 80.

In FIG. 14, a plurality of bolts 81 are embedded in the rear surface of the back cursor 48, and the holes 83 of the movable mount 82 are fitted to the bolts 81 and fastened with nuts 84. The movable mounting table 82 is fixed to the rear cover 48 side. The movable mounting table 82 has a pair of protrusions 82a on the upper side and a lower side, and a pair of protrusions 82b which are slightly larger than this, and the protrusions 82a are formed with holes 85 and the protrusions 82b. Slot 86 is formed. Further, the pawl 80 for moving the movable mounting table 82 has a pair of pole supporting members 88 and 89, respectively, corresponding to the protrusions 82a and 82b of the movable mounting table 82. In the support members 88 and 89, through holes 88 ′ penetrating the pawls 80 correspond to the holes 85 of the protrusions 82a and the slots 86 of the protrusions 82b and ( 89 ') is formed. Then, the holes 85 and the through-holes 88 'are aligned with the slots 86 and the through-holes 89', and the nuts 92 and 93 are fastened through the bolts 90 and 91, respectively. Tighten, and mount the movable mounting table 82 on the pawl 80. By moving the movable mount 82 with the nuts 92 and 93 loosened, the movable mount 82 can rotate in the range of the slot 86 with the bolt 90 as the point, thereby allowing the You can roughly adjust the relief.

In addition, a through hole 94 penetrating the pole 80 is formed between the support members 88 and 89 of the pole 80, and one side of the pole 80 opposite to the through hole 94 is formed. The nut 95 is fixed by welding or the like, and the elevation angle adjusting bolt 96 penetrates the through hole 94 and is inserted into the nut 95 so as to be screwed with the nut 95. When the bolt 96 is turned into the nut 95, the tip of the bolt 96 comes into contact with the movable mounting table 82. When the bolt 96 is further turned, the nuts 92 and 93 are loosened. In the state, the movable mounting base 82 moves to the opposite side from the pole 80 against the pressure of the bolt 96. This enables fine adjustment of the elevation angle of the antenna. That is, only one bolt 96 can fine-tune the elevation angle at a predetermined angle, for example, in the range of 16 °.

Further, the pawl 80 is bent at a predetermined angle, for example, 20 degrees at least in the vicinity of the antenna mounting portion, for example, the support member 89. Therefore, it is not necessary to rotate the movable mounting table 82 largely to obtain a predetermined elevation angle of the antenna, and the slot 86 may be small, so that the bracket of the movable mounting table 82 can be made smaller.

And the cover 97 is covered by the part of the movable mounting stand 82 so that the tip part of the pawl 80 may be covered. The cover 97 has a cutout 97a in which the width 80 falls out and a coupling part 97b that engages with the converter case 102 on both sides thereof.

In addition, the rear cover 48 is provided with a pair of bosses 98 and a predetermined number of bosses, for example, four bosses 99, and the converter 100 is attached to the pair of bosses 98 by a vis. . Then, after the packing 101 is disposed around the converter 100, the converter case 102 is mounted to the boss 99 with a screw (not shown). At this time, the front end portion of the converter case 102 is coupled to the coupling portion 97b of the cover 97.

FIG. 15 is a rear view of the entire antenna device of the present invention assembled as described above, and the antenna main body is offset by a predetermined angle, for example, 10 ° from the vertical direction, and again by bending the pole 80 as described above. The antenna main body and the pawl 80 are offset by 20 °, so that by making fine adjustment with the elevation angle adjustment bolt 96, the elevation angle of the antenna is changed in this case between 30 ° and 46 °. Of course, this angle of the antenna can be arbitrarily set according to the reception state of radio waves in each region.

16 shows the change in the elevation angle by the elevation angle adjustment bolt 96, the solid line is pulled out to the end of the bolt 96, and the dashed-dotted line is the state in which the bolt 96 is turned to the end.

Here, the adjustment procedure of the elevation angle and azimuth angle of the antenna will be described.

First, the pawl 80 is temporarily fixed, the nuts 92 and 93 are loosely fixed, and the movable mounting table 82 is moved substantially so that the elevation angle is corresponding to the region, for example, the satellite of the orbit. It is brought to the position of 38 degrees in Tokyo, Japan and 31 degrees in Sapporo, Japan. And the elevation angle adjustment bolt 96 is adjusted, and the elevation angle of an antenna is made into the angle corresponding to the area | region roughly exactly. The pole 80 is then rotated to face the antenna southwest (in the case of Japan). This approximately determines the azimuth angle of the antenna. Next, after receiving the desired radio wave, the bolt 96 is again adjusted to finally determine the elevation angle of the antenna, and then the nuts 92 and 93 are tightened to fix the movable mounting table 82 to the pole 80. Next, the pawl 80 is rotated slightly to finally determine the azimuth angle of the antenna, and the pawl 80 is fixed. Thereby, the desired radio wave can be received reliably.

FIG. 17 shows an example of the mounting method of the pawl 80. For example, the pawl 80 is fixed to a fence 106 such as a south-side veranda using a fixing plate 107, a U-shaped bolt 108, and a nut 109. . Of course, the mounting method of the pole 80 is not limited to this method.

In the embodiment shown in Fig. 14, by using the pole serving as the mounting table, the main body of the antenna and the pole can be integrated to reduce the number of parts in the antenna mounting structure, and the configuration is also reduced. In addition, by forming the fine adjustment column with only one bolt, the number of parts can be reduced and the adjustment can be simplified. In addition, by bending the middle of the pole, the dedicated space of the elevation control mechanism itself can be reduced.

In yet another embodiment of FIG. 18, the substrate 3 is supported between the lower plate 1 and the substrate 3 and between the substrate 3 and the upper plate 2, respectively. Spacers 110 and 111 for uniformly supporting the gap between the upper plate 1 and the lower plate 2 are disposed. As the spacers 110 and 111, for example, a high foaming material having a low dielectric constant and a low loss dielectric such as polyethylene, polypropylene, and polystyrene is used.

19 shows a cross-sectional shape in which the spacer 110 is sandwiched between the lower plate 1 and the substrate 3 and the spacer 111 is sandwiched between the substrate 3 and the upper plate 2, respectively. The board | substrate 3 can be reliably supported by the space | interval uniformly in the middle of the upper and lower plates 2 and 1, and the board | substrate 3 does not shift a position partially in an up-down direction.

In order to minimize dielectric loss, the spacers 110 and 111 drill holes 112 and 113 in the portions corresponding to the radiating elements, that is, the printing elements 8, respectively.

20 shows a detailed configuration of the spacer 110 representatively among the spacers 110 and 111, and the spacer 111 is also the same as this.

In FIG. 20, 114 is a hole which avoids the input waveguide 40 (FIG. 8B) to the converter 44, 115 is a positioning hole, and 116 is a boss for fixing the whole. A hole to avoid 71 (Fig. 13A). Reference numeral 117 denotes a hole for avoiding the projection 30 (FIG. 19). In addition, the hole 117 is formed to cover the entirety of the spacer 110 once with or without the protrusion 30 in order to improve the mass productivity of the spacer 110. It is used as a hole to avoid the projection 30.

In the example of FIG. 19, a spacer having a plurality of holes corresponding to the upper plate and the substrate and between the lower plate of the substrate is disposed so as to support the substrate, so that the substrate is in the middle of the upper and lower plates as compared with the example of FIG. Can be reliably supported at uniform intervals, and the positional displacement of the substrate is not caused in part in the vertical direction, thereby degrading the antenna characteristics. In addition, the projections 30 and 31 protruding from the upper and lower plates can be greatly reduced, and the production of the plate can be simplified, and the mass productivity can be improved.

While the embodiments of the present invention have been described above, it should be understood that those skilled in the art can make various modifications and changes without departing from the spirit and scope of the present invention, and thus the scope of the present invention. Shall be determined by the scope of the following claims.

Claims (13)

A substrate sandwiched between an upper plate and a lower plate, the upper plate having a plurality of holes forming a radiating element, a plurality of corresponding radiating elements formed on the substrate in alignment with the holes, and feeding the radiating element. The upper and lower plates formed of a feeding plate, which is formed of a flat plate without projections, form a projection by pressing at a corresponding plurality of positions of the upper and lower plates by deforming a part of the upper and lower plates, and forming the projections. Suspended-line feed type flat antenna supported by said protrusion which occupies a small part of the surface of an upper and lower plate by arrange | positioning between the said upper plate and the said board | substrate, and between the lower plate and the said board | substrate. 2. An antenna according to claim 1, wherein said power supply portion comprises an input waveguide, an output waveguide, and support means having a bolt passing through said upper and lower plates and said substrate to support said input and output waveguides. The display apparatus of claim 1, further comprising: a radome and a rear cover surrounding the upper and lower plates, a plurality of supporting members formed on an inner surface of the rear cover, and the upper and lower plates and the substrate at positions corresponding to the supporting members. An antenna having a plurality of corresponding holes, wherein the upper and lower plates and the substrate are supported by the support member through the corresponding plurality of holes. The antenna of claim 3, wherein the plurality of support members comprises protrusions integrally formed with the rear cover, and includes plate holders and bolts for supporting the upper and lower plates and the substrate at positions of the protrusions. 2. The rake according to claim 1, further comprising a radome and a rear cover for enclosing the upper and lower plates, a pole having an upper portion inclined with respect to a vertical line, a first through hole disposed above the inclined upper portion and the inclined portion. Adjusting the elevation angle of the back cover and the decorative means comprising a second through hole disposed below the upper portion, a first bolt through the first through hole for mounting the back cover to the pawl And an adjusting means including a second bolt penetrating the second through hole. 2. The apparatus of claim 1, further comprising a first spacer having a corresponding plurality of holes inserted between the upper plate and the substrate, and a second having a corresponding plurality of holes inserted between the substrate and the lower plate. Antenna consisting of spacers. A substrate sandwiched between an upper plate and a lower plate, the upper plate having a plurality of spaced holes forming a radiating element, a corresponding plurality of radiating elements formed in the substrate in alignment with the holes, and the radiating element Suspended line consisting of a feeder for feeding the power supply portion, the feeder comprises an input waveguide, an output waveguide, and a support means having a bolt penetrating the upper and lower plates and the substrate to support the input and output waveguides. Feed planar antenna. A substrate sandwiched between an upper plate and a lower plate, the upper plate having a plurality of holes forming a radiating element, a plurality of corresponding radiating elements formed on the substrate in alignment with the holes, and feeding the radiating element. And a radome and a rear cover surrounding the upper and lower plates, wherein the rear cover has a plurality of support members formed on an inner surface thereof, and the upper and lower plates and the substrate at positions corresponding to the support members. Suspended line-feeding planar antenna is provided with a plurality of holes in the upper and lower plates and the substrate is supported by the support member through the corresponding plurality of holes. The antenna of claim 8, wherein the plurality of support members comprises protrusions integrally formed with the rear cover, and includes plate holders and bolts for supporting the upper and lower plates and the substrate at positions of the protrusions. A substrate sandwiched between an upper plate and a lower plate, a back cover surrounding the upper and lower plates, the upper plate having a plurality of holes forming a radiating element, and corresponding holes formed in the substrate in alignment with the holes, respectively. A plurality of radiating elements, a feeding part for feeding the radiating elements, and a supporting means, wherein the supporting means comprises: a pole having an upper portion inclined with respect to a vertical line, and a first disposed above the inclined upper portion; A mounting means including a through hole, a first bolt through the first through hole for mounting the back cover to the pole, and a second through hole to adjust the elevation angle with the back cover. A suspended line feed type flat array antenna comprising adjustment means including a second bolt and a second through hole. 11. The pawl of claim 10, wherein the pawl has a third through hole that is approximately perpendicular to the first and second through holes, and the fine adjustment means is configured to finely adjust the elevation angle of the back cover. An antenna comprising a third bolt through the. A substrate sandwiched between an upper plate and a lower plate, the upper plate having a plurality of holes forming a radiating element, a plurality of corresponding deflecting elements formed on the substrate in alignment with the holes, and feeding the radiating element. A second spacer having a feeding part, a first insulating spacer having a corresponding plurality of holes inserted between the upper plate and the substrate, and a corresponding plurality of holes inserted between the substrate and the lower plate. Suspended line feed plane antenna consisting of. 13. The antenna of claim 12 wherein the first and second spacers are each a plastic sheet.

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