JP2778440B2 - Portable antenna - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a portable antenna which is used for a mobile earth station in a satellite communication system, adjusts elevation and azimuth, and is disassembled and assembled for transportation.

[0002]

2. Description of the Related Art Conventionally, portable antennas such as a parabolic antenna and a planar array antenna used in mobile earth stations of this kind are required to have portability and easy installation at a moving point. Furthermore, it is easy to move, and the elevation and azimuth (lateral direction) can be added to the desired transponder of the geostationary satellite.
It is also required that the initial setting work for matching the respective beam directions (radiation patterns) be easy.

[0003] Such a portable antenna has already been proposed in a "portable antenna device" disclosed in JP-A-63-302606.

FIG. 10 is a side view showing a configuration in Japanese Patent Application Laid-Open No. 63-302606. In FIG. 10, the power supply unit 1 and the reflecting mirror 2 are fixed by a reflecting mirror support 3, and the elevation angle is adjusted by a height adjusting jack 4.

[0005]

However, the above-mentioned portable antenna disclosed in Japanese Patent Application Laid-Open No. 63-302606 has a great limitation on the beam adjustment range of the elevation angle.
That is, the elevation angle adjustment range is determined in accordance with the expansion / contraction range of the elevation adjustment jack 4, and in order to widen the elevation angle adjustment range, the elevation adjustment jack 4 has to be provided with a wide expansion / contraction range, that is, a long jack. Mirror support 3
And increased the overall weight. Therefore, if priority is given to miniaturization, the elevation angle adjustment range can respond only to a limited area, and the portable antenna has a limited use area.

[0006]

SUMMARY OF THE INVENTION The present invention relates to a portable antenna device in which at least a feeding unit, a directional antenna, and an adjustment unit can be separated and assembled, wherein the adjustment unit includes an elevation angle adjustment mechanism and an azimuth angle adjustment mechanism. This is a configuration including:

[0007] In this configuration, the directional antenna is a parabolic antenna provided with a feeding unit and a reflector.

The azimuth angle adjusting mechanism has an azimuth rotation stopping portion provided with an upper panel rotatably or stopably provided on the lower panel, and the elevation angle adjusting mechanism detachably mounts the reflecting mirror support section on the upper panel. The screw member expands and contracts by the rotation of the outer member to which the screw member is screwed, and the directivity is set together with the reflector support portion. A telescopic part for changing the elevation angle of the antenna, and two connecting means that can be attached and detached at both ends even if the direction of the reflecting mirror support part is reversed, and symmetrically bent in the middle of the connecting means; It is configured to include a fixed base connected by the expansion and contraction section around the elevation angle axis.

[0009] In addition to these configurations, the azimuth adjustment mechanism is provided with a tripod base fixed to the lower panel and folding at least two legs.

An electric rotating mechanism for changing the azimuth is provided in place of the upper and lower panels of the azimuth adjusting mechanism, and
It is configured to include an electric expansion and contraction unit that changes the elevation angle instead of the expansion and contraction unit.

[0011]

According to the portable antenna of the present invention having the above-described structure,
At least the power supply unit, the directional antenna, and the adjustment unit are configured to be separated and assemblable. An elevation angle adjustment mechanism for varying the directional antenna in the elevation direction to match the directivity with the communication station, and an azimuth angle adjustment mechanism for varying the azimuth angle to match the directivity with the communication station. Is provided. The elevation angle adjusting mechanism includes a fixed base having two detachable connection means disposed at both ends even if the direction of the reflector support is reversed.

Therefore, the elevation angle and the azimuth angle can be easily and quickly adjusted. As for the elevation angle, the elevation angle when the expansion / contraction portion of the elevation angle adjustment when the reflector support portion is attached to the connecting means on one side is the maximum extension is d °, and the rotatable range of the elevation angle axis due to the extension / contraction is e °. The adjustment range is (d + e)
The angle of elevation is (d + e) ° when the reflecting mirror support portion is turned to the opposite direction and attached to the other connecting means when the expansion and contraction portion is most contracted, and the elevation angle is increased by extending the expansion and contraction portion to (d + 2e). ° can be varied. That is, the elevation angle adjustment range is 2e °, which is twice as large as the rotation range e ° of the elevation axis, and the elevation angle adjustment range can be widened without doubling the length of the expansion / contraction section of the elevation angle adjustment. Becomes

[0013] Further, disassembly and assembly are possible, and the transportation is facilitated.

[0014]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, the present invention will be described with reference to the drawings. FIG. 1 is a front view showing an assembled state of a portable antenna according to one embodiment of the present invention, and FIG. 2 is a side view. 3, 4 and 5 are exploded views of FIG. 1, wherein the portable antenna includes the feed unit 20 and the reflector unit 3.
0, disassembled into adjustment units 40 and transported in respective storage cases. In the power supply unit 20 of FIG. 3, the power supply unit 21 is supported by the power supply unit support unit 22. Further, the reflecting mirror unit 30 of FIG.
It is supported by 2. The adjustment unit 40 in FIG. 5 includes an azimuth adjustment unit 47 that adjusts an azimuth angle by rotating on a tripod mount 49 that can be folded, an elevation adjustment unit 50 that adjusts an elevation angle by expanding and contracting, and an elevation adjustment unit. The connection fittings 41 and the connection fittings 4 on which the reflector support 32 can be attached and detached are provided on the top 50
There is a fixed base 43 on which the two are mounted. These connection fittings 41, 42
Are mounted on both sides of a fixed base 43 having a structure which is bent symmetrically left and right from the center by a predetermined angle f ° so as to be detachable even if the connection direction of the reflector support 32 is reversed. The fixed base 43 can support an upper member 44 which can rotate around a shaft 45. The shaft 45 is a bearing 4 on the azimuth adjustment unit 47.
6 is supported. The azimuth adjustment unit 47 rotates a disk 47a on a disk 47b fixed to a tripod mount 49. The tripod mount 49 can be kept horizontal to the ground surface by the height adjusting bolts 48a, 48b, 48c.

A method for assembling a portable antenna according to the present invention will be described. The adjustment unit 40 is placed at the installation location, and the reflector support 32 is connected to the connection fitting 41 or the connection fitting 42, depending on the desired elevation angle. And the reflector support 32
Is connected to the lower part of the feeder support 22.

Next, the adjusting method will be described. To adjust the azimuth, the end of the reflecting mirror 31 is grasped and rotated around the azimuth adjustment unit 47. The elevation angle is adjusted by expanding and contracting the elevation angle adjustment unit 50. Depending on whether the reflector support 32 is connected to either the connection fitting 41 or the connection fitting 42 of the fixed base 43,
Elevation angle adjustment range is different.

Next, the adjustment range of the elevation angle of the portable antenna according to the present invention will be described. FIG. 6 is a side view of the portable antenna of the present invention. This figure is a view for explaining the elevation angle when the expansion and contraction section of the elevation angle adjustment section 50 is most extended when the reflector support section 32 is attached by the connection fitting 41.
In this case, the elevation angle is the lowest elevation angle of d °. FIG.
Similarly, when the reflector support 32 is attached by the connection fitting 41 and the expansion range of the elevation adjustment unit 50 is set to e ° when the expansion and contraction unit of the elevation adjustment unit 50 is most contracted, the elevation angle is (d + e). ) °.

FIG. 8 is a view when the expansion and contraction portion of the elevation angle adjusting portion 50 is most contracted when the reflecting mirror support portion 32 is attached to the connection fitting 42 in the opposite direction to FIGS.
In this case, the elevation angle is (d + e) °.

FIG. 9 shows a state in which the reflector support 32 is connected to a connection fitting 42.
FIG. 7 is a diagram when the expansion and contraction portion of the elevation angle adjustment portion 50 is extended most when the camera is attached to the camera. In this case, (d + 2e)
°.

That is, the reflecting mirror support 32 is connected to the connection fitting 4.
By attaching to 1, the rotation range of the elevation axis is e °
However, by attaching to the connection fitting 42, the elevation angle adjustment range can be doubled to 2e °.

In this embodiment, the elevation angle adjusting section 50 is configured to be manually adjusted. However, the elevation angle adjusting section 50 can be automatically controlled by providing an electric expansion / contraction section.

Similarly, the azimuth adjustment unit 47 can also be automatically controlled by using an electric rotating disk instead of the upper disk 47a and the lower disk 47b.

[0023]

As described above, according to the present invention, the fixing base 43 is provided with connecting fittings 41 and 42 at both ends and formed into a symmetrically bent shape in the middle of the connecting means. The elevation angle adjustment range can be doubled to 2e ° with respect to the rotatable range e ° of the elevation axis without doubling the length, without increasing the length of the expansion / contraction part of the elevation angle adjustment. This has the effect of expanding the elevation angle adjustment range.

[Brief description of the drawings]

FIG. 1 is a front view showing a configuration of a portable antenna according to an embodiment of the present invention.

FIG. 2 is a side view showing a configuration of a portable antenna according to an embodiment of the present invention.

FIG. 3 is a side view of the power supply unit 20 of the present invention.

FIG. 4 is a side view of the reflecting mirror unit 30 of the present invention.

FIG. 5 is a side view of the adjustment unit 40 of the present invention.

FIG. 6 is a side view of a portable antenna having an elevation angle of d ° according to the present invention.

FIG. 7 is a side view of a portable antenna having an elevation angle of (d + e) ° according to the present invention.

FIG. 8 is a side view of a portable antenna having an elevation angle of (d + e) ° according to the present invention.

FIG. 9 is a side view of the portable antenna of the present invention having an elevation angle of (d + 2e) °.

FIG. 10 is a side view of a configuration of a conventional portable antenna.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Power supply part 2 Reflection mirror 3 Reflection mirror support stand 4 Height adjustment jack 20 Power supply unit 21 Power supply part 22 Power supply part support 30 Reflection mirror unit 31 Reflection mirror 32 Reflection mirror support 40 Adjustment unit 41 Connection fitting a 42 Connection fitting b 43 Fixed base 44 Upper member 45 Shaft 46 Bearing 47 Azimuth angle adjustment unit 48 Height adjustment bolt 49 Tripod base 50 Elevation angle adjustment unit

Claims (4)

(57) [Claims] At least a feeding unit, a directional antenna,
In a portable antenna that can be separated and assembled from an adjustment unit, the adjustment unit is folded left and right symmetrically from a center at a predetermined angle.
The bent fixed base and the directional antenna are
Of the fixed table so that it can be
Connection fittings respectively attached to both sides, and the fixing base
The directional antenna arranged at the bottom is variable in the elevation direction.
The elevation angle adjustment mechanism and the directional antenna can be varied by azimuth
A portable antenna , comprising: 2. An azimuth adjusting mechanism comprising : a lower panel;
Orientation with upper panel that can be freely rotated or stopped
A rotation stop portion, wherein the elevation angle adjustment mechanism is provided with the upper platen;
An elastic portion attached between the lower surface of the fixed base and the
Attached to the lower surface of the fixed base and provided on the upper panel
Engaged with the shaft and the shaft according to the expansion and contraction of the expansion and contraction portion.
2. The portable antenna according to claim 1 , further comprising a member rotatable in a predetermined angle range at a center . 3. The portable antenna according to claim 1, further comprising a tripod base fixed to a lower panel of the azimuth adjusting mechanism and capable of folding at least two legs. 4. An arrangement according to claim 2, wherein an electric rotating mechanism for changing the azimuth angle is provided in place of the upper and lower panels of the azimuth adjusting mechanism, and said extendable portion is an electric extendable portion.
Portable antenna which is characterized in Rukoto.