JPH06101646B2 - Wireless communication device - Google Patents

Description

DETAILED DESCRIPTION [Outline] A hermetically-sealed housing containing a wireless communication circuit unit is positioned below a main reflecting mirror, and a sub-reflecting mirror facing the scoop-shaped antenna of the hermetically-sealed housing can be attached to the antenna. Wireless communication device as close as possible to make the whole small space.

[Industrial application field]

The present invention relates to a wireless communication device combined with a reflector antenna, and particularly to a wireless communication device having a small capacity as a whole.

In recent years, wireless communication devices that use ultra-high frequencies in the microwave or millimeter-wave band have been solidified in the ultra-high frequency region, are being miniaturized, and are being mounted at a higher density, which also efficiently generate heat inside the device. It began to radiate heat. on the other hand,
Communication is performed by making the polarization planes of the transmitted and received radio waves different by 90 degrees, but the polarization planes are selectively converted as needed, and a reflector is combined for long distances to improve efficiency. Communication is common.

[Conventional technology]

In order to perform wireless communication remotely via a communication satellite, it is necessary to increase the output of the transmitted radio wave and also to amplify the received signal radio wave. Further, the polarization planes are made to coincide with each other as necessary, but the direction in space may be appropriately changed.

A conventional wireless communication device is shown in the schematic perspective view of FIG. The receiving device 12 and the transmitting device 13 attached to the frame 11 house the main parts thereof, and the adjacent high frequency amplifying device 14 is connected to the transmitting device 13 by a high frequency cable 15.

The high frequency output signal of the high frequency amplifying device 14 is output and transmitted into the waveguide 16 and reaches the polarization splitter 17. The signal is further transmitted to the waveguide 18 to the antenna (not shown) via the demultiplexer 17. On the other hand, the high frequency input signal received from the antenna is the waveguide 18
The signal is transmitted to reach the polarization splitter 17, and is input to the reception device 12 via the other waveguide 19 connected to the polarization splitter.

For example, the high frequency output is in the 14 GHz band and the spatial propagation mode is vertical polarization, and the high frequency input is in the 12 GHz band and the spatial propagation mode is horizontal polarization. Therefore, the waveguide 18 has a square cross section or a circular cross section capable of transmitting both of these modes, and the demultiplexer 17 outputs and separates both signals.

A large number of signal lines, control lines, and power lines are connected to each of the above devices, but these are omitted in the drawing. Then, these devices have a cubic shape as shown in the drawing with their covers independently covered, but they are not suitable for outdoor exposure, so they can be stored indoors or in a suitable wind and rain enclosure. .

The reception device 12 contains a reception signal processing circuit, and the transmission device 13 contains the main parts up to the final output of the transmission signal processing circuit. The heat generated inside is sufficiently dissipated to ensure reliability. Maintained.

The high frequency amplifier 14 uses a traveling wave tube (TWT) as an amplifier so that the high frequency signal from the transmitter 13 is amplified and output. Since this TWT requires a lot of electric power and generates heat during operation, it is necessary to maintain cooling.
For this reason, the large radiator 14a is exposed on the vertical surface of the device and is internally contacted with it for natural air cooling.

FIG. 9 shows a conventional wireless communication device different from that shown in FIG.
In the figure, a concentric antenna 22 is open-connected via a waveguide-type polarization conversion element 21 on the wave combining side of the demultiplexer 20.
A transmitter waveguide 23 and a receiver waveguide 24 are connected to the input and output sides, respectively. The waveguides 23 and 24 are connected to a hermetically sealed casing 25 that accommodates the main output circuits of the transmitter circuit and the high-frequency portion of the receiver circuit.

The opening of the antenna 22 is attached and fixed to the frame body 27 in the illustrated state so as to be offset and coupled with the main reflecting mirror 26 having a concave surface. The lower part of the frame is supported on a column 29 via a support 28.

The support base 28 has a side adjusting screw 2 centered on the upper support shaft 28a.
By extending and contracting 8b, the entire frame 27 is tilted to the left and right, and the plane of polarization can be changed by 90 degrees (± 45 degrees), for example. Further, the elevation angle can be varied in the front-back direction of the support base 28, that is, the entire frame body 27, for example, in the range of 10 to 60 degrees by extending and contracting the adjusting screw 28d on the back surface around the lower support shaft 28c. The joint between the support base 28 and the support column 29 is capable of pivoting and fixing the support base 28 and above so as to be freely movable in the horizontal direction.

[Problems to be solved by the invention]

In the conventional wireless communication device described above, in FIG. 8, the receiving device, the transmitting device, and the high-frequency amplifying device are independent, and although they are integrated by the frame, they are large as a whole and are directly exposed to the outdoors. Handling because it can not be installed
There is a problem that maintenance is inconvenient and the antenna is large and complicated when the antenna part (not shown) is included.

Furthermore, if the polarization plane of spatial propagation is changed by 90 degrees depending on the situation, it is necessary to rotate the demultiplexer by 90 degrees on the axis. A bend waveguide or a twisted waveguide must be combined and connected to the pipe, which is a complicated and troublesome operation.

Also, in the case of FIG. 9, the main part of the circuit is housed in a hermetically sealed case and connected to the antenna in close proximity, which is greatly improved, but the entire frame is tilted when the polarization direction is changed. It requires a lot of work, and the operation becomes large. By directly connecting the antenna and the main reflecting mirror, the position of the antenna must be arranged in the projecting position so as to be the focal position of the main reflecting mirror. Therefore, a large installation space is required. The adjustment of the arrangement setting to the focal position has to be done in front of the main reflecting mirror, which is troublesome.

[Means for solving problems]

According to the wireless communication device of the present invention for solving the above conventional problems, the main reflecting mirror and the wireless communication circuit portion located below the main reflecting mirror are accommodated, and the one side is provided with a conical antenna. A frame body for fixing and supporting the closed casing and the sub-reflecting mirror corresponding to the main reflecting mirror surface facing the antenna, respectively, is supported on a support base having a mechanism capable of adjusting and fixing in the horizontal direction and the elevation direction. Therefore, the above-mentioned hermetically-sealed housing must be supported so that it can be rotationally fixed about the axis of the antenna depending on horizontal polarization and vertical polarization.

Further, the hermetically sealed housing contains a transmission circuit and a reception circuit.

The hermetically-sealed housing is supported by a pedestal that can be attached to and detached from the opposite direction of the sub-reflecting mirror.

Further, the hermetically-sealed housing is achieved by being supported on a mount so as to be rotatable and fixed about an antenna axis.

[Action]

Since the transmitter circuit section and the receiver circuit section are divided into left and right parts in orderly mounted in the hermetically sealed case, assembly, inspection, etc. are easy, and their heat generation goes to the side surface through the bottom part.
Natural heat is efficiently dissipated to the space from the heat dissipation fins on the outer side.

The high frequency amplification part is attached to the outer surface of the bottom part as a separate body,
Natural heat is directly radiated from the heat radiation fins on the outer surface to the space, and the overall size is extremely small and waterproof.

On one side of the hermetically-sealed case, a demultiplexer is interposed and a reciprocating hollow wire is provided, and a sub-reflecting mirror corresponding to the main-reflecting mirror is arranged facing the antenna. Since it is located below the reflecting mirror, the radio waves are folded back so that the entire space can be made extremely small. As a matter of course, it is an offset position with respect to the main reflecting mirror.

By supporting the closed casing on the gantry, the polarization direction can be easily converted by rotating it around the antenna axis, and maintenance and inspection can be easily performed.

〔Example〕

Hereinafter, a wireless communication device of the present invention will be specifically described with reference to the drawings by way of embodiments.

1 to 7 show an embodiment of the present invention. First, the perspective view of the closed casing shown in FIG. 2 with the lid open, and the cross-section main part of FIG. 3 will be described. In the figure, a hermetically-sealed housing 30 accommodating a receiving part 31 and a main part 32 of a transmitting part of a wireless communication circuit is a box-shaped main body 33, and a removable lid 35 for covering and sealing an opening surface 34 of the main body 33. And a high-frequency amplifier 38 that is detachably attached to the outer surface 37 of the bottom 36 of the main body 33.

The casing 39 of the main body 33 has a flange shape around the upper surface opening 34, and two grooves are formed on the surface, and the electromagnetic shielding member 41 is airtight in the inner groove 40 and the outer groove 42 ( Watertight ring
43 is fitted and surrounded (FIG. 3a), the flange surface of the lid 35 having the same shape is flat, and bolt holes 44 for tightening are provided on the outside thereof.

A large number of heat dissipation fins 45 are formed on the outer surface of the housing 39.
The outer surface 37 of the bottom portion 36 is a flat surface.

A recess 46 is formed on the inner surface side of the housing of the high-frequency amplification unit 38, and the high-frequency amplification unit 48 is screwed with a screw 49 in close contact with the inner surface 47 of the recess.
It has been installed by. Although not shown in detail, this unit 48 is composed of a solid-state amplifier having a high-frequency input end on one side and an amplifying high-output end on the other side.

Further, a large number of heat dissipation fins 50 are formed in the lateral direction on the outer surface of the bottom of the high-frequency amplifier 38, and the surface that contacts the outer surface 37 of the bottom of the main body 33.
51 has the same shape as the surface 37, but two grooves are formed on the periphery thereof, the inner groove 52 is fitted with an electromagnetic shielding member 53, and the outer groove 54 is fitted with an airtight (watertight) guard ring 55. And a bolt hole 56 for fastening is provided on the outside thereof (Fig. 3b).

The main body housing 39, the lid 35, and the amplifier housing 57 have good thermal conductivity, high strength, excellent corrosion resistance, and are integrally formed of a dense aluminum alloy casting to form a precision product. It is preferable to perform various processing finishes, surface coating treatments, and the like.

In FIG. 2, the A side is the antenna side and the B side is the cable introduction side (described later). Reference numeral 58 on the A side is a waveguide having a circular (or square) cross section, and is connected to an antenna so that both polarized waves can be transmitted. The position of the waveguide 58 penetrates the main body casing 39 at a position including the maximum shape part of the lid 35 and the high frequency amplification part 38 and the center of the circle shown by the chain double-dashed line C in FIG. ing.

At the same position on the B side, the outer circular cable inlet 70 (4th
Therefore, if the entire device is coaxially rotatably supported by these parts (Fig. 6), the transmitted radio wave and the received radio wave can be perpendicular to each other with their polarization directions different from each other by 90 degrees. It can be easily set to either horizontal polarization.

A polarization demultiplexer (not shown) is arranged inside the main body 33 of the circular waveguide 58 of FIG. 2, and the transmission output waveguide of the polarization demultiplexer is the high output part of the high frequency amplification part. The receiver input waveguide is connected to the receiver input end. The receiving side waveguide connecting elements 69 can be seen. The transmission output waveguide or the reception input waveguide is, for example, a rectangular waveguide, and is connected to the input / output port of the demultiplexer. Therefore, for example, when the closed casing is fixed, the transmission signal is set to the vertically polarized wave and the reception signal is set to the horizontally polarized wave. However, when the closed housing is rotated 90 degrees, the input / output polarization plane of the signal at the input / output port of the demultiplexer is also changed.
It changes 90 degrees. Therefore, when the sealed enclosure is rotated 90 degrees,
The polarization plane of the transmitted / received signal changes from vertical to horizontal, or from horizontal to vertical.

The transmitter 32 receives the transmission signal from the B side, and outputs a low-output high-frequency output for transmission to the A side. In the high frequency amplifier 38, the high frequency power is amplified to a high output from the A side to the B side, and the antenna 75 (fourth antenna) is transmitted from the demultiplexer through the circular waveguide 58.
(Fig.) Is transmitted and emitted.

On the other hand, the weak received high-frequency signal incident on the antenna 75 is
It reaches the demultiplexer through the circular waveguide 58, is separated into the receiving input waveguide, and is coaxially converted at the end portion via the receiving side waveguide 69.
The signal is input coaxially on the A side of the receiver 31. The reception unit 31 processes the electric signal and outputs the reception signal to the B side.

As shown in the side view of the assembly appearance in FIG. 4, an antenna 75 connected to a circular waveguide (or a square waveguide) 58 on one side of an axis D extending longitudinally through the center of the hermetically sealed housing 30 has an airtightness that transmits radio waves. It is a round (or square) scoop shape with a (watertight) window,
The outer shape of the connection flange 76 with the main body 33 is circular. The outer periphery 79 of the cable introduction / exit 78 having the other polarization direction indicator plate 77 on the end face is circular. FIG. 5 shows the appearance as viewed from the direction of the display plate 77.

The indications on the display plate 77, V and H at the rotational position of 90 degrees are based on, for example, the polarization direction of the transmission output, and in this case, V
Indicates vertical polarization and H indicates horizontal polarization, and the position is determined in accordance with the inverted triangular mark 88 (which is attached to the stationary portion). Therefore, that of the received radio wave is determined horizontally and vertically.

FIG. 6 shows a perspective view to be mounted on the mount. The pedestal 80 has a frame shape, and two opposing sides are cut respectively to form bearings 81 and 82 for receiving the lower half circumference of the outer periphery 79 of the connection flange 76 and the cables 79. The frame shape is
The entire transmitter / receiver is housed, and a sufficiently rotatable space is secured inside. The pin 83 penetrates the display plate 77 and is fixed to the housing 39 of the main body, but two holes at different 90-degree positions are provided.
By selectively penetrating either 84 or 85, it is possible to rotate the entire closed casing and set the fixed position according to the polarization plane used for the transmission / reception signal. For example, the sixth
When the holes 84 are fixed in the state of the angle shown in the figure, the transmission signal is vertically polarized and the reception signal is horizontally polarized. Then the hole
When the sealed enclosure is rotated 90 degrees and fixed at 85, the transmitted signal becomes horizontally polarized and the received signal becomes vertically polarized. (However, if the way of connecting the transmitting and receiving waveguides to the input / output ports of the demultiplexer described in FIG. 2 is reversed, the vertical and horizontal relationship described above is reversed.) The polarization plane can be easily set only by rotating and fixing the hermetically-sealed case, even when the polarization plane is decided depending on the location to be changed or when the polarization plane is changed.

Fine adjustment of V / H polarization (for example, ± 45 degrees) by using a screw instead of the pin 83, making the hole 84 a screw hole, and making the pin through hole of the display plate 77 an oval hole of, for example, ± 45 degrees arc. ) Can also be enabled.

The connecting flange 76 and the holding metal fittings 86, 86 for holding the upper half circumference of the outer circumference 79 on the other side can be fastened to the pedestal 80 by the screws 87 to fix the entire transmitting / receiving section.

For the penetration of the cables at the cables introduction port 78, the cables (not shown) are sealed and fixed by a known watertight (airtight) penetration means.

FIG. 1 shows a side surface (a) and a rear surface (b) of the wireless communication device of the present invention. The wireless communication device includes a horizontal swing mechanism section 9 of a column 90 standing upright in the center of a horizontal leg section 89 and its upper support 98.
1, a tilt angle adjusting mechanism 94 for tilting a frame 92 for supporting the upper transmitter / receiver and an antenna in a vertical vertical direction about a horizontal axis 93, and a fixing screw 95 for fixing at a predetermined angle position,
A sub-reflecting mirror 96, which is mounted in close proximity to the opening in the air 75 of the transmission / reception unit mounted on each frame 80 in the lower center of the frame 92.
And a large-diameter main reflecting mirror 97 mounted so as to face upward.

As described above, the transmitted radio wave is emitted from the antenna 75, but the entire emission angle range effectively irradiates the entire surface of the sub-reflecting mirror 96, and while further expanding, the main reflecting mirror 97, which is concave overall, forms an effective space. It is defined by the beam width and is propagated to a remote point (for example, a communication satellite). Received radio waves that are radiated radio waves from a remote point (for example, a communication satellite) follow the reverse of the above system, that is, are received by the main reflecting mirror 97, are reflected and focused by a rotating parabolic surface, an elliptical surface, and the like, and are passed through the sub reflecting mirror 96. Aerial line 75
Entered in. Above, antenna 75, sub-reflector 96, main reflector
The mutual positional relationship of 97 is fixed as an optimum position on the frame 92, and it is immovable even by horizontal turning and adjustment of the depression / elevation angle.

Of course, in this state, as described above, it is possible to easily rotate the transmitting / receiving section together with the antennas 75 on the gantry 80 to convert the polarization direction.

FIG. 7 is a perspective view of a main part for attaching / detaching the transmitting / receiving part from the rear side to / from the frame. As described above, the closed casing 30 having the antenna 75 attached to the pedestal 80 is mounted and fixed. Horizontally opposed groove-shaped guides 101 are attached to the left and right inside the frame 92, and L-shaped positioning fixtures 102 are also attached to the left and right in the front.

The right and left sides of the gantry 80 are fitted into the guides 101 and pushed in.
Since the left and right front ends 103 of the pedestal 80 contact the fixing metal fittings 102, the fixing metal fittings 102 and the pedestal 80 are attached and fixed with screws 104,
The pedestal 80 and the guide 101 are attached and fixed with screws 105 on the rear side.
As a result, the mounting positions of the closed casing 30 and the antenna 75 are determined in a predetermined manner. It can be easily removed by removing the screws 104 and 105.

The position of the antenna 75 with respect to the reflectors 96, 97 is precisely determined at the factory. That is, the screw 106 for attaching the guide 101 to the frame body 92 can move the left and right guides 101 in parallel up and down or incline back and forth because the hole 107 of the frame body 92 is a long hole in the vertical direction. I / O can be the optimum condition. The mounting hole 108 of the fixing bracket 102 is horizontal (front and back)
Since the hole is long in the direction, the fixed position can be adjusted back and forth. Therefore, a distance between the sub-reflector 96 and the antenna 75 is possible,
The focal length position of radio waves can be set optimally. The position determined as described above is kept constant by loosening the screws 104 and 105 thereafter.

〔The invention's effect〕

As described above, according to the wireless communication device of the present invention, the closed casing and the main reflecting mirror are located on the vertical center of the support base, and the antenna and the sub-reflecting mirror are in close proximity to each other and offset with respect to the main reflecting mirror. Has become. Therefore, the upper part of the main reflecting mirror is in a forward tilted posture, which prevents snow accumulation, dust, and sand and mud from adhering to the mirror surface, which is convenient. In addition, the center of gravity of the entire body is located on the support table, which is stable and has little distortion against wind pressure. The projecting length at the position of the sub-reflector is short, so the entire unit fits in a small space. You can easily change the plane of polarization from the back.

Antenna is horn antenna, corrugated horn antenna,
Other antennas such as an offset Cassegrain antenna, an offset Gregorian antenna, and the like can be applied.

[Brief description of drawings]

FIG. 1 is an embodiment of the present invention, in which (a) is a side surface, (b) is a rear surface, FIG. 2 is a perspective view of a transmitting / receiving section, and FIG. 3 is a cross section of FIG.
FIG. 4 is a side view of the transmitting / receiving section, FIG. 5 is a view taken along the line D--D in FIG. 4, FIG. 6 is mounted on a mount, FIG. 7 is mounted on a frame, and FIG. , FIG. 9 is the second related art. In the figure, 30 is a closed casing, 75 is a hollow wire, 92 is a frame, 96 is a sub-reflecting mirror, 97 is a main reflecting mirror, and 98 is a support.

Claims (4)

[Claims] 1. A hermetically sealed enclosure provided with a main reflecting mirror (97) and a radio communication circuit portion located below the main reflecting mirror (97) and fixedly provided on one side with a reed-shaped antenna (75). Body (30),
A frame body (92) for fixedly supporting the antenna (75) and the sub-reflecting mirror (96) facing the main reflecting mirror (97) surface facing each other.
Is supported by a support base (98) having a mechanism that can be adjusted and fixed in the horizontal direction and the vertical direction, and the closed casing (30) is provided.
Is the antenna (7
A wireless communication device, which is supported so as to be rotatable and fixed about the axis of 5). 2. The wireless communication device according to claim 1, wherein the closed casing (30) accommodates a transmission circuit (32) and a reception circuit (31). 3. The enclosure (30) is supported by a pedestal (80) which can be attached to and detached from the sub-reflecting mirror (96) in a direction opposite to the sub-reflecting mirror (96). The wireless communication device according to item 2. 4. The wireless communication according to claim 3, wherein the closed casing (30) is rotatably supported on the mount (80) about an antenna axis. apparatus.