JP2011087182A - Flat antenna device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a lightweight flat antenna device for easy transportation, capable of being manually assembled with ease, also with its polarization axis easily adjustable to that of a main polarized wave, without using an expensive axis control mechanism for the antenna. <P>SOLUTION: The flat antenna device includes a flat antenna 20 and a base rack part 30 for installing the flat antenna 20, wherein the flat antenna 20 has an antenna terminal part 46 protruding from inside of a rotation axis member 40 provided on backside of the flat antenna and a cam member 43 is fixedly installed on the rotation axis member 40. A mounting wall panel 31 of the base rack part 30 has a vertically-long hole 31a, into which the rotation axis member 40 is inserted, to allow the rotation axis member 40 to move in the vertical direction, and a horizontally-long hole 31b, into which a terminal pin 43b provided on a top of the cam member 43 is inserted to allow it to move horizontally. Rotational movement of the rotation axis member 40 by moving the terminal pin 43b along the horizontally-long hole 31b allows an adjustment of the polarization axis of the flat antenna 20. <P>COPYRIGHT: (C)2011,JPO&amp;INPIT

Description

  The present invention relates to an FPU (microwave external repeater) planar antenna apparatus used for television relay, and more particularly, the best regardless of the installation state of the relay station and the type of main polarization of the microwave when receiving microwaves. The present invention relates to a planar antenna device provided with an eccentric mechanism that can be easily adjusted to the reception state of.

  In the television relay, video signals from the interview site are transmitted to the broadcasting station via an outside relay vehicle, a helicopter relay device, etc. at the interview site, and the outside repeater is equipped with an FPU. The FPU has a parabolic type or a planar antenna integrated with a high frequency unit, or a parabolic antenna is installed in a relay car, and a flat antenna is assembled and installed at a relay site. In addition, the external repeater may be installed in a helicopter relay device equipped with a relay vehicle or a horn antenna, and may be relayed while tracking radio waves. By controlling the phase of the transmission wave that feeds the antenna element, the planar antenna system can track and receive signals with higher accuracy and speed than a parabolic antenna, and is lighter and easier to assemble than a parabolic antenna. Planar antennas are being used.

  In television relay, for example, there is a mobile communication SNG (Satellite News Gathering) device that transmits a video signal to a broadcasting station using a communication satellite. Since the SNG device is also suitable for tracking, a transmission / reception planar antenna is used. As shown in FIG. 4, the rotation axis 2, the orthogonal elevation axis 3, the elevation axis 4, the polarization axis of the turntable 1 are used. A planar antenna 6 is fixed to the polarization axis 5 of the 4-axis control machine tracking system of the wave axis 5, and an azimuth sensor 11, an orthogonal elevation sensor 12, an elevation sensor 13, and a polarization sensor 14 are attached to each axis, and the tracking is performed. A controller 15 is provided. The planar antenna 6 rotates the planar antenna 6 so that the vertical polarization direction and the horizontal polarization direction of the antenna element of the antenna coincide with the direction of the polarization plane of the satellite (see, for example, Patent Document 1).

JP-A-9-270634

  A mobile SNG device of a conventional example is a device that is mounted on a high-speed mobile body and relays on a television, and transmits and receives video signals by adjusting the axes so that the polarization directions of the microwaves coincide. This main four-axis adjusting mechanism is widely implemented. However, when relaying to a TV, the FPU relay station is installed with a flat antenna manually installed in the relay vehicle, or a flat antenna integrated with the high-frequency part of the FPU is used. The best relay station must be constructed according to the situation of the interview site. In the case of a fixed relay station, there is no need to provide an expensive axis adjustment mechanism such as a control mechanism of a mobile SNG device, and there is a disadvantage that it becomes expensive when a control mechanism similar to that of a mobile SNG device is used. Even when a relay station is installed by rushing to an emergency coverage site, it is disadvantageous in that it is heavy and inconvenient to transport, and it is desirable to have a compact, lightweight and non-bulky shape. Of course, some relay vehicles are equipped with an FPU and a mobile SNG device.

  In addition, the relay station where the FPU with the planar antenna is installed is not necessarily a horizontal place but may be an inclined surface. In such a case, when the flat antenna of the FPU is fixed, there is a drawback that a sufficient gain cannot be obtained unless the horizontal polarization axis of the flat antenna and the horizontal polarization axis of the microwave coincide with each other. Although it was adjusted to the best state using the expansion and contraction of the tripod equipped with, it was troublesome. In addition, the planar antenna may be used as it is or rotated by 90 ° depending on the type of main polarization, and the planar antenna is rotated by 90 ° with respect to horizontal polarization or vertical polarization. However, when the planar antenna is fixed, adjustment is difficult.

  The present invention has been made in view of the problems as described above, and is lightweight and easy to transport without using an expensive antenna axis control mechanism, and can be easily assembled by hand. An object of the present invention is to provide a planar antenna device that can easily adjust the polarization axis of the planar antenna with respect to the main polarization.

  The present invention solves the above-mentioned problems, and the invention according to claim 1 is that the planar antenna device includes a planar antenna and a base portion on which the planar antenna is mounted, and the planar antenna is provided on the back side thereof. The rotating shaft member has an antenna terminal portion protruding from the rotating shaft member, and a cam member is fixed to the rotating shaft member. The rotating shaft member is inserted into the mounting wall surface of the base portion, and the rotating shaft member is A vertical elongated hole that is movable in the vertical direction; and a horizontal elongated hole that is horizontally movable by insertion of a terminal pin provided at the tip of the cam member, and the terminal pin extends along the horizontal elongated hole. By moving the rotating shaft member, the rotating shaft member is rotated so that the polarization axis of the planar antenna can be adjusted.

  In the invention of claim 2, the cam member is provided with a plurality of cut portions, and a stopper member provided on a side surface portion of the base portion is fitted to the cut portion to rotate the cam member. 2. The planar antenna device according to claim 1, wherein the planar antenna device is regulated.

  According to the first aspect of the present invention, the cam member swings by sliding the terminal pin of the cam member provided on the rotating shaft member of the planar antenna along the horizontal elongated hole, so that the rotating shaft member of the planar antenna becomes the vertical elongated hole. Can be adjusted by rotating the main polarization axis of the planar antenna easily according to the polarization axis, and with a very simple eccentric mechanism, the gain of the planar antenna can be improved. There is an advantage that can be set to. Also, by rotating the rotating shaft member by 90 °, the polarization axis of the planar antenna is rotated by 90 ° from the initial setting state of the planar antenna, and the polarization axis of the planar antenna is changed from the vertical polarization to the horizontal polarization. An axis can be set. Furthermore, it is possible to prevent the rotation shaft member from being raised by the rotation of the polarization axis of the planar antenna, that is, the planar antenna is raised and the lower end edge of the planar antenna is brought into contact with the lower surface. Further, it is possible to prevent the upper end edge of the planar antenna from being greatly swung during rotation.

  Further, in the invention of claim 2, the cam member is provided with a plurality of cut portions, and the stopper member provided on the side surface portion of the base portion is fitted to the cut portion to restrict the rotation of the cam member. As a result, the polarization axis of the planar antenna can be easily fixed at a predetermined angle.

It is an external appearance perspective view from the back side which shows one Example of the planar antenna apparatus which concerns on this invention. It is a disassembled perspective view of a present Example. (A) is a rear view of a present Example, (b) is the schematic side view which abbreviate | omitted the one side wall board of the base part, and showed the rotating shaft member in detail. It is a schematic side view of the conventional mobile SNG apparatus.

  Hereinafter, an embodiment of a planar antenna device according to the present invention will be described with reference to the drawings. First, an embodiment of the planar antenna device of the present invention will be described with reference to FIG. 1 which is a perspective view from the back side.

  The present embodiment includes a planar antenna 20 and a base portion 30 on which the planar antenna 20 is mounted. A rotating shaft member 40 is provided on the back surface of the planar antenna 20, and an antenna terminal portion 46 projects from the rotating shaft member 40. A cam member 43 is attached to the rotary shaft member 40, and a vertical long hole 31a through which the rotary shaft member 40 can be moved in the vertical direction through the mounting wall plate 31 of the base portion 30; The terminal pin 43b provided at the tip of the cam member 43 has a horizontal elongated hole 31b that can be moved horizontally by being inserted. The terminal pin 43b is moved along the horizontal elongated hole 31b, and the cam member 43 is shaken. By moving the rotary shaft member 40, the polarization axis of the planar antenna 20 can be adjusted.

  The horizontal oblong hole 31b is effective for adjusting the horizontal polarization with respect to the horizontal polarization horizontal to the ground, and is effective for adjusting the vertical polarization axis with respect to the vertical polarization perpendicular to the ground. In the planar antenna device of the present embodiment, the weight member 34 is fixed to the bottom plate 33 with screws, and the through hole 34a provided in the center of the weight member 34 is attached to the FPU casing, relay vehicle or pole tip. The provided bolt can be inserted and fixed.

  Next, this embodiment will be described in detail with reference to FIGS. The planar antenna 20 is an existing one, and a rotary bearing portion 21a having a plurality of screw holes 21b is provided on the back surface side of the planar antenna 20, and the terminal portion 21 projects from the center of the rotary bearing portion 21a. The terminal portion 21 is provided at the lower edge from the center position of the planar antenna 20. Incidentally, when the terminal portion 21 of the planar antenna 20 is rotated about the axis, the upper end edge of the planar antenna 20 is greatly undesirably swung, and in this embodiment, by moving the center of the rotation axis in the vertical direction, The planar antenna 20 is prevented from swinging greatly.

  The base portion 30 includes a mounting wall plate 31 provided with a vertical long hole 31a and a horizontal long hole 31b, a side wall plate 32 provided on both sides of the mounting wall plate 31, and a bottom plate 33 standing on the side wall plate 32. The mounting part 32a to which the rotation restricting member 50 is attached to the side wall plate 32 is provided. The horizontal elongated hole 31b is provided with its longitudinal center line parallel to the bottom plate 33, and the vertical elongated hole 31a is provided above the center line perpendicular to the longitudinal center line of the horizontal elongated hole 31b. In addition, although the shape of the base part 30 makes the vertical elongate hole 31a and the horizontal elongate hole 31b an essential element, the attachment structure of the rotation control member 50, etc. are not limited to this Example.

  The rotating shaft member 40 includes a hooked ring member 41 and a wide ring member 42, and a cam member 43 having an insertion hole 43 a is attached to the rotating shaft member 40. The cam member 43 is provided with a through hole 43e on a concentric circle, one end of the support bar 45 is fixed by a screw inserted through the through hole 43e, and the substrate part 44 of the antenna terminal part 46 is screwed to the other end of the support bar 45. It is fixed with. The ring member 41a of the hooked ring member 41 is fitted from the outside into a vertical elongated hole 31a provided in the mounting wall plate 31 of the base portion 30, and the wide ring member 42 faces the ring member 41a from the inside of the mounting wall plate 31. A plurality of through holes 41c, 42a, 43d are provided in the ring member 41 with a hook, the wide ring member 42, and the cam member 43, respectively, and a bolt 60 is inserted into these through holes 43d, 42a, 41c. Then, the ring member 41 with a flange, the wide ring member 42, and the cam member 43 are fixedly engaged with the screw hole 21b provided in the rotary bearing portion 21a on the back surface side of the planar antenna 20, and the rotary shaft member 40 is mounted. The vertical long hole 31 is inserted into a vertical long hole 31 a provided in the wall plate 31 so as to be vertically movable.

  Further, in the outer peripheral edge of the cam member 43, four groove portions 43c are provided at intervals of 90 ° with respect to the rotation center, and the shaft member 50a protruding from the rotation restricting member 50 is engaged with the groove portion 43c. The rotation of the cam member 43 is restricted and the rotation of the planar antenna 20 is restricted. The groove 43c may have any shape as long as it can be locked. A plurality of intervals between the groove portions 43c may be provided at intervals of 5 ° or 10 °, for example. When the step of the groove 43c is 90 °, the planar antenna 20 can be adjusted by rotating it 90 ° so that the horizontal polarization axis and the vertical polarization axis of the planar antenna 20 are aligned with the main polarization axis of the radio wave. . In addition, when the position where the planar antenna device is installed is tilted, the horizontal polarization axis should be tilted by 5 ° or 10 ° so as to be aligned with the horizontal polarization axis so that the level is maintained. Can do. Of course, both groove portions may be formed on the outer peripheral edge portion of the cam member 43, and in this case, the groove portions of 5 ° or 10 ° are distinguished by forming the depth of the groove in 90 ° increments. You may do it.

  FIG. 3A shows the case where the planar antenna 20 is in the initial state (the upper and lower edges of the planar antenna 20 are parallel to the bottom plate 33), and the terminal pin 43b is the left end of the horizontal long hole 31b. It is in. When the terminal pin 43c is moved to the right from this initial state, the rotary shaft member 40 rises along the vertical elongated hole 31a, and the position of the terminal pin 43c is maximized at the center position. The member 40 descends while rotating. At that time, the planar antenna 20 rotates 90 ° as indicated by an arrow A. That is, the vertical polarization axis of the planar antenna 20 can be aligned with the horizontal polarization axis.

  When the planar antenna 20 is rotated 90 ° to the right (opposite to the arrow A), it is necessary to move the terminal pin of the cam member 43 from right to left, which is the opposite side to FIG. The cam member 43 is attached to the rotary shaft member 40 so as to be positioned at the position. When the planar antenna device is assembled manually, it can be selected according to the radio wave condition.

  As described above, in the planar antenna device of the present invention, each member is small and light, and can be normally disassembled and stored in a case and transported by an aircraft such as a helicopter. It can be easily assembled by transporting the case to the site and taking out each part. At that time, the polarization axis of the planar antenna can be easily adjusted so that the reception gain of the planar antenna is optimized by a simple eccentric mechanism. In addition, this planar antenna device can provide an FPU device that can adjust the polarization axis of the planar antenna and that is configured integrally with the high-frequency portion of the FPU and the planar antenna.

  As an application field of the present invention, there is an FPU device using a planar antenna used for television relay.

DESCRIPTION OF SYMBOLS 20 Planar antenna 21 Terminal part 21a Rotating bearing part 21b Screw hole 30 Base part 31 Mounting wall board 31a Vertical long hole 31b Horizontal long hole 32 Side wall board 32a Mounting part 33 Bottom board 34 Weight member 34a Through-hole 40 Rotating shaft member 41 With a flange Ring member 41a Ring member 41b
41c Through-hole 42 Wide ring member 42a Through-hole 43 Cam member 43a Insertion hole 43b Terminal pin 43c Groove 43d, 43e Through-hole 44 Substrate part 45 Support rod 46 Antenna terminal part 50 Rotation restriction member 50a Shaft member 60 Bolt

Claims (2)

  The planar antenna device includes a planar antenna and a base portion on which the planar antenna is mounted. The planar antenna has an antenna terminal portion that protrudes from the inside of the rotating shaft member provided on the back surface side, and has a cam on the rotating shaft member. The rotation shaft member is inserted into the mounting wall surface of the base portion and the rotation shaft member is movable in the vertical direction, and provided at the distal end portion of the cam member. A horizontal elongated hole through which the terminal pin is inserted and horizontally movable, and by rotating the terminal pin along the horizontal elongated hole, the rotating shaft member is rotated, and the polarization of the planar antenna A planar antenna device characterized in that an axis can be adjusted.   The cam member is provided with a plurality of cut portions, and a stopper member provided on a side surface portion of the base portion is fitted to the cut portion to restrict the rotation of the cam member. The planar antenna device according to claim 1.

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