KR20020004076A - Yagi antenna and clamp device capable of tilting and aiming - Google Patents

Abstract

PURPOSE: A YaGi antenna capable of tiling and aiming is provided to be easily installed and controlled in case that the orientation of the antenna is changed due to wind or external impulse or is to be changed at need, thereby reducing the risk to an installer. CONSTITUTION: A radiator for radiating electric waves, a plurality of wave guides axially arranged with predetermined gaps on one side of the radiator, and a reflector formed on the other side of the radiator are integrally manufactured into an antenna device. A connector supplies signals to the antenna device. A bracket(211) is bended into U-shape and a first rotation shaft(214) and a groove(216) on its both sides. A first clamp(212) is inserted into the bracket(211) and has a vertical rotation shaft(215). A second clamp(213) is assembled to the first clamp(212) and has engaging steps(217) on its bottom/top surfaces and fixing holes(218) on its both sides.

Description

Yagi antenna and clamp device capable of tilting and aiming}

The present invention relates to a Yagi antenna used for transmitting and receiving a radio signal in a communication system, and more particularly, in order to be easy to install and to have an accurate directivity in a direction to be transmitted or received. The present invention relates to a Yagi antenna that can be adjusted in up, down, left, and right directions to be adjusted in the left and right directions.

Yagi antennas are designed to transmit and receive in a specific direction with high gain, and are generally fixed to walls or structures using clamping devices. To install such clamping devices, it is dangerous to work on high structures. In addition, there is a problem that the operation is difficult, and once the installed antenna is reinstalled in any direction up and down or left and right, the same operation as the initial installation must be repeated.

The present invention has been made to solve the problems of the prior art as described above is easy to install, and when the direction angle of the antenna is changed by the wind or external impact, or if necessary to adjust the angle up or down or left and right adjustment It is an object of the present invention to provide a Yagi antenna that can be adjusted in up, down, left, and right directions, which reduces the risk of the installer by making the work time shorter due to this ease.

1A is an external view of a yagi antenna according to the prior art;

1b is a plan view of a clamping device according to the prior art;

Figure 2a is an internal view of the Yagi antenna that can be adjusted in the up, down, left and right directions according to the present invention.

Figure 2b is an external perspective view of the clamping device of the Yagi antenna that can be adjusted in the up, down, left and right directions according to the present invention.

2C is a perspective view of FIG. 2B.

Figure 3 is a perspective view of the wall-type clamping device of the Yagi antenna that can be adjusted in the vertical, left, and right directions according to the present invention.

Figure 4 is an external perspective view of the mast-type clamping device of the Yagi antenna that can be adjusted in the up, down, left and right directions according to the present invention.

※ Explanation of codes for main parts of drawing

111.Paul 112, 220. Copier

113.Reflector 114, 219.

115, 221.Connector 116. Clamp

117, 43.Mast 118, 31, 41. Antenna

119, 212. First clamp 120, 213. Second clamp

121. Clamp cover 122. Bolt head

123 Nuts

211. Bracket 214. First rotating shaft

215. Second axis of rotation 216. Groove

217. Locking jaw 218. Fixing hole

32. Wall clamp 42. Mast clamp

Yagi antenna that can be adjusted in the vertical, left, and right directions according to the present invention is a copier for radiating radio waves, a plurality of waveguides arranged in the axial direction at a predetermined interval on one side of the copier, and formed on the other side of the copier An antenna element having an integral reflector; A connector for feeding a signal to the antenna element; Brackets bent in the shape of a chair having a first rotating shaft and a groove, respectively; A first clamp inserted into the bracket and assembled to the bracket, the first clamp having a second rotating shaft disposed on an upper and lower surface thereof; The second clamp is assembled to the first clamp but has a locking jaw and a fixing hole on the upper and lower surfaces, respectively.

Hereinafter, according to the accompanying drawings, the characteristics and operation principle of each part of the Yagi antenna that can be adjusted in the up, down, left and right directions according to the present invention will be described in detail. 1A is an external view of a Yagi antenna according to the prior art, which uses a principle that radio waves are induced to a reflector or a waveguide, which is an adjacent element due to a magnetic field generated by a radiator supplied with a wireless signal. Here, the reflector or waveguide is called a parasitic element, and the waveguide is actually shorter than λ / 2 and installed in front of λ / 4, and the reflector is installed slightly longer in λ / 2 and installed after λ / 4 ( Is the wavelength of the frequency used). In this Yagi antenna, the radio waves are radiated from the copier and directed to the waveguide and reflected by the reflector on the opposite side, which enables efficient radiation in the desired direction. Yagi antennas are widely used for transmitting / receiving microwaves and receiving television broadcasts, and their gains vary depending on the length, thickness, spacing, and number of elements.

1b is a plan view of a clamping device according to the prior art. The first clamp 119 and the second clamp 120 are coupled to each other to have a rectangular shape, one side of which is equipped with an antenna 118, the other side is coupled to the mast 117. The clamp cover 124 and the second clamp 120 are coupled by the polygonal bolt 124 with the mast therebetween. First, the polygonal bolt is attached to the second bolt using the bolt head 122 and the nut 123. The clamp 120 is fixed, the clamp cover 121 is covered, and then a nut is tightened to be coupled. In this case, in order to couple the bolts, the bolt head 122 must be fixed with one hand and the nut 123 must be tightened with the other hand. Therefore, there was a problem that the assembly was not easy and the precision was also poor.

Figure 2a is an internal view of the Yagi antenna that can be adjusted in the up, down, left and right direction according to the present invention, Figure 2b is an external perspective view of the antenna clamping device capable of adjusting in the vertical, left, and right directions according to the present invention. Bracket 211 is The first rotating shaft 214 and the groove 216 are respectively provided on the left and right sides bent in a shape of a child, and the first clamp 212 having the second rotating shaft 215 on the upper and lower surfaces is assembled by being fitted into the bracket. The second clamp 213 is assembled to the first clamp but the locking jaw 217 and the fixing hole 218 are formed on the left and right sides, respectively. In this operation of FIG. 2A, the first clamp 212 is movable up and down along the groove 216 with respect to the first rotation shaft 214, and is fixed by a screw after the movement, and provided in the first clamp. The second clamp 213 can be moved left and right about the second rotating shaft 215, and after the movement, the second clamp 213 is fixed by a screw as described above, but is rotated by the locking jaw 217 provided in the second clamp. The maximum possible angle is limited. In addition, the fixing holes 218 provided on the left and right sides of the second clamp are fixed to the wall or fastened with screws, and the antenna is assembled to the bracket. FIG. 2C is a perspective view of FIG. 2B.

3 and 4 respectively show embodiments of the present invention, Figure 3 is an external perspective view of the clamping device of the Yagi antenna that can be adjusted in the vertical, left, and right directions according to the present invention, Figure 4 is according to the present invention It is an external perspective view of the mast type clamping apparatus of Yagi antenna which can be adjusted to up-down-left-right direction. In the above two embodiments, the adjustment function and the operating principle in the up, down, left, and right directions are as described with reference to FIGS. 2B and 2C, and FIG. 3 illustrates a case in which the antenna is installed in a structure such as a wall. It shows the case of installing in a cylindrical or similar shaped column.

Therefore, the Yagi antenna that can be adjusted in the up, down, left, and right directions according to the present invention has an effect that the installation work is easy and the installation time is shortened, thereby reducing the risks encountered during installation. It also has the effect that it can be easily realized if the direction is changed or if it is necessary to change the direction of the antenna.

Claims (4)

In the Yagi antenna for transmitting and receiving radio waves in a wireless communication system, An antenna element having a copier for radiating radio waves, a plurality of waveguides arranged in an axial direction at predetermined intervals on one side of the copier, and a reflector formed on the other side of the copier; A connector for feeding a signal to the antenna element; Brackets bent in the shape of a chair having a first rotating shaft and a groove, respectively; A first clamp inserted into the bracket and assembled to the bracket, the first clamp having a second rotating shaft disposed on an upper and lower surface thereof; Yagi antenna which is assembled to the first clamp, and can be adjusted in the up, down, left, and right directions including a second clamp having a fixing hole on the upper and lower sides and a fixing hole on the left and right, respectively. The method of claim 1, Yagi antenna that can be adjusted in the vertical, left, and right directions, characterized in that the first clamp is movable up and down with the first rotation axis as the axis can be fixed by a screw. The method of claim 1, The second clamp is movable left and right with the second axis of rotation as an axis, and can be fixed by screws, and the maximum angle can be limited by the locking jaw. antenna. The method according to claim 1, wherein Yagi antenna that can be predetermined in the up, down, left and right directions, it can be installed in the wall or mast type by replacing the second clamp according to the type of the structure to install the antenna.