KR200480730Y1 - Log antenna - Google Patents

Abstract

A low cost implemented log antenna is disclosed. Wherein the log antenna comprises a first plate, a second plate spaced apart from the first plate, at least one first dipole member extending from the first plate, at least one second dipole extending from the second plate, A dipole member, and a feed cable arranged above the first plate. Here, the first plate has a first vertical part, the second plate has a second vertical part, the first vertical part is provided with a first insert member, and the second vertical part has a second vertical part, And a second insert member having two holes are formed in the first insert member. The outer core of the feed cable is coupled to the first insert member in a state of being inserted into the first hole of the first insert member, Is inserted into the second insert member in a state of being inserted into the second hole of the member, and the feed cable is not physically directly coupled to the plates.

Description

Log antenna {LOG ANTENNA}

The present invention relates to a log antenna.

One of the antennas used in the wireless communication system is a log antenna, and the log antenna is widely used because it can realize a wide band through a unique geometric arrangement.

Generally, the log antenna uses a feed cable to feed power to the plates. However, if the plate is made of aluminum, the plate is mainly made of an expensive copper plate because welding is not performed well due to the characteristics of aluminum. As a result, the manufacturing cost of the log antenna has increased.

Korean Patent Publication No. 2002-0004076 (published on Jan. 16, 2002)

The object of the present invention is to provide a low-cost log antenna.

In order to achieve the above object, a log antenna according to an embodiment of the present invention includes a first plate; A second plate spaced apart from the first plate; At least one first dipole member extending from the first plate; At least one second dipole member extending from the second plate; And a feed cable arranged on the first plate. Here, the first plate has a first vertical part, the second plate has a second vertical part, the first vertical part is provided with a first insert member, and the second vertical part has a second vertical part, And a second insert member having two holes are formed in the first insert member. The outer core of the feed cable is coupled to the first insert member in a state of being inserted into the first hole of the first insert member, Is inserted into the second insert member in a state of being inserted into the second hole of the member, and the feed cable is not physically directly coupled to the plates.

According to another aspect of the present invention, there is provided a log antenna comprising: a first plate; A second plate spaced apart from the first plate; At least one first dipole member extending from the first plate; At least one second dipole member extending from the second plate; And a feed cable arranged on the first plate. Here, a first insert member is provided on the first plate, a second insert member is provided on a vertical portion of the second plate, and an outer diameter of the feed cable is coupled with the first insert member on the first plate The inner core of the feed cable is coupled to the second insert member in a state where the inner core is arranged through the hole of the second insert member and the feed cable is not physically coupled directly to the plates.

According to the present invention, the log antenna is welded to the insert member provided on the plate without welding the feed cable directly to the plate. Therefore, since the plate can be made of a low-priced aluminum plate, the manufacturing cost of the log antenna can be reduced.

1 is a schematic view illustrating a structure of a log antenna according to a first embodiment of the present invention.
2 is a view showing a coupling structure of a plate coupling member according to an embodiment of the present invention.
3 is a schematic view illustrating a structure of a log antenna according to a second embodiment of the present invention.
4 is a view showing a structure of an insert member according to an embodiment of the present invention.
5 is a view illustrating a coupling structure of a feed cable according to an embodiment of the present invention.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.

The present invention relates to a log period antenna, in which a solderable insert member is installed on a plate without welding the feed cable directly to an antenna plate, and then welded to the insert member.

In general, in order to directly weld the feed cable to the antenna plate, the antenna plate has to be made of an expensive copper plate that can be welded. As a result, the manufacturing cost of the log period antenna is increased.

On the other hand, in the log periodic antenna of the present invention, the feed cable is welded to the insert member provided on the antenna plate, so that the antenna plate can be made of a low-cost pure aluminum plate. As a result, the manufacturing cost of the log period antenna can be reduced. Of course, power from the feed cable is fed to the antenna plate through the antenna plate.

Hereinafter, various embodiments of the log period antenna of the present invention will be described in detail with reference to the accompanying drawings.

FIG. 1 is a view schematically showing a structure of a log antenna according to a first embodiment of the present invention, and FIG. 2 is a view showing a coupling structure of a plate coupling member according to an embodiment of the present invention.

Referring to Fig. 1, the log antenna of the present embodiment may include a case 100, an antenna element 102, and a connector 104. Fig.

The antenna element 102 includes an upper plate 110, a lower plate 112, a feed cable 114, a first dipole member 120, a second dipole member 122, a first insert member 130, And may include an insert member 132.

Although not shown, the top plate 110 may be coupled to the inner surface of the case 100 at one end and may have a generally flat shape. 1, that is, the top plate 110 may include a vertical portion 110a that extends vertically or alternately from the body portion. The upper portion of the upper plate 110 may be perpendicular to the upper portion of the upper plate 110, have.

The lower plate 112 has a generally flat shape, and one end can be formed vertically as shown in Fig. That is, the lower plate 114 may include a vertical portion 112a extending vertically or crosswise from the body portion.

According to one embodiment, the top plate 110 and the bottom plate 112 may be a low cost pure aluminum plate.

A feed line, for example a feed cable 114, is arranged on the top plate 110 and includes an outer core 114a and an inner core 114b.

The outer core 114a can be welded (soldered) to the first insert member 130 in a state of being inserted into the hole of the first insert member 130 provided in the vertical portion 110a of the upper plate 110, The first insert member 130 can be electrically connected to the top plate 110 through the first insert member 130. [ As a result, a negative current or a ground current can flow through the top plate 110.

The inner core 114b can be welded to the second insert member 132 while being inserted into the hole of the second insert member 132 provided in the lower plate 112. That is, And may be electrically connected to the lower plate plate 112 through the through hole 132. As a result, a positive current can flow through the lower plate 112. On the other hand, the vertical portion 110a of the upper plate 110 and the vertical portion 112a of the lower plate 112 are physically / electrically separated.

That is, the feed cable 114 supplies power to the plates 110 and 112 through the insert members 130 and 132. [ In particular, the feed cable 114 may be welded to the insert members 130 and 132 provided on the plates 110 and 112 without being welded directly to the plates 110 and 112.

At this time, the plates 110 and 112 may be made of, for example, a low-priced pure aluminum plate. Due to the nature of aluminum, the feed cable 114 is not welded well to the aluminum plate. Therefore, the present invention is characterized in that the feed cables 114 are welded to the insert members 130 and 132 in a state where the insert members 130 and 132 made of a welded material are installed on the vertical portions 110a or 112a .

According to one embodiment, the insert members 130 and 132 may each be made of a tin-plated aluminum material. On the other hand, even when the insert members 130 and 132 are made of brass, the feed cable 114 can be welded, but the brass is oxidized well. Therefore, when the feed cable 114 is welded to the insert member 130 or 132 in the oxidized state, soldering failure occurs during welding. Of course, the feed cable 114 may be coupled to the insert member 130 or 132 after cleaning the insert member 130 or 132 to remove oxidation, but the process is complicated and the cost is increased. In addition, since the price of brass itself is higher than that of tin-plated aluminum, it is effective to use tin-plated aluminum material for the insert members 130 and 132. That is, replacing the tin plated aluminum with the insert members 130 and 132 with brass may be substantially impossible.

Therefore, the present invention can use tin-plated aluminum as a material of the insert members 130 and 132, which can be implemented at a low cost without causing solder failure.

As a result, the log antenna of the present embodiment can reliably supply power to the plates 110 and 112 by using the feed cable 114 while reducing the manufacturing cost by implementing the plates 110 and 112 as low-cost aluminum plates .

The first dipole members 120 may include vertically elongated, for example, dipole members 120a and dipole members 120b formed to the right from the top plate 110. [ The dipole members 120a and 120b may be alternately formed from the upper plate 110 and may be reduced in length toward the vertical portion 110a for broadband realization.

The second dipole members 122 may include vertically elongated, for example, dipole members 122a formed to the left and dipole members 122b formed to the right from the lower plate plate 112. The dipole members 122a and 122b may be alternately formed from the top plate 110 and may be reduced in length toward the vertical portion 112a in order to realize a wide band.

Here, the first dipole members 120a and the second dipole members 122a realize the radiation pattern of the first frequency band, and the first dipole members 120b and the second dipole members 122b It is possible to realize a radiation pattern of two frequency bands.

The plate engaging member 150 can engage the upper plate 110 and the lower plate 112.

According to one embodiment, the plate engaging member 150 includes a body 150a and a connecting portion 150b as shown in FIG. In addition, a hole 150c may be formed in the body 150a.

The body 150a is located on the upper surface of the upper plate 110 and the connecting portion 150b can connect the plates 110 and 112. At this time, although not shown, threads may be formed on the outer circumferential surface of the connection portion 150b and threads may be formed on the inner circumferential surfaces of the holes of the plates 110 and 112 so that the threads may be engaged.

Meanwhile, the feed cable 114 can pass through the hole 150c of the body 150a.

That is, the plate joining member 150 can not only join the plates 110 and 112, but also secure the feed cable 114 securely.

In summary, in the log antenna according to the present embodiment, the feed cable 114 is not welded directly to the plates 110 and 112 but welded to the insert members 130 and 132 provided on the plates 110 and 112 . Therefore, the plates 110 and 112 can be implemented at low cost, thereby reducing the manufacturing cost of the antenna. In particular, the insert members 130 and 132 may be made of tin-plated aluminum with little weld defect.

FIG. 3 is a view schematically showing a structure of a log antenna according to a second embodiment of the present invention, FIG. 4 is a view showing a structure of an insert member according to an embodiment of the present invention, and FIG. FIG. 5 is a view illustrating a coupling structure of a feed cable according to an embodiment of the present invention.

3, the log antenna of the present embodiment may include a case 300, an antenna element 302, and a connector 304. As shown in Fig.

The antenna element 302 includes an upper plate 310, a lower plate 312, a feed cable 314, a first dipole member 320, a second dipole member 322, a first insert member 330, And may include an insert member 332.

The remaining parts except for the coupling structure of the feed cable 314 are similar to those in the first embodiment, and the description thereof will be omitted.

The insert member 330 or 332 includes a body 400 and a fitting portion 402 as shown in FIG. 4, and a hole 406 is formed therein.

The engaging portion 402a of the first insert member 330 may be arranged on the upper surface of the upper plate 310 and the body 400a may be inserted into the upper plate 310. [ At this time, the outer core 314a of the feed cable 314 can be welded to the engaging portion 402a arranged on the upper surface of the upper plate 310 as shown in Fig. 5 (A). As a result, power can be fed from the feed cable 314 to the top plate 310. [

The engaging portion 402b of the second insert member 332 is positioned on the inner surface of the vertical portion 310a of the upper plate 310 and the body 400b is positioned on the vertical portions 310a and 312a of the plates 310 and 312, The first insert member 330 can be coupled to the plates 310 and 312 as shown in Figure 5 (B).

At this time, the inner core 314b of the feed cable 314 can be arranged through the hole 406 of the second insert member 332 and can be welded to the engaging portion 402b of the second insert member 332 have. As a result, electric power can be supplied from the feed cable 314 to the lower plate plate 312.

Above, although insert members 330 and 332 are referred to as having the same structure, insert members 330 and 332 may have other configurations. However, the second insert member 332 may have the structure of FIG. However, it is advantageous in cost and manufacturing process that the insert members 330 and 332 have the same structure.

Since the feed cable 314 can be stably fixed to the plates 310 and 312 via the insert members 330 and 332, a plate coupling member may not be required in the log antenna of the present embodiment.

It will be apparent to those skilled in the art that various modifications, additions and substitutions are possible, without departing from the scope and spirit of the invention as disclosed in the accompanying claims. Should be regarded as belonging to the following claims.

100: Case 102: Antenna element
104: connector 110: upper plate
112: lower plate 114: feed cable
120: first dipole member 122: second dipole member
130: first insert member 132: second insert member
150: plate coupling member 310: upper plate
312: lower plate 314: feed cable
320: first dipole member 322: second dipole member
330: first insert member 332: second insert member
400: body 402: first coupling portion

Claims (6)

A first plate;
A second plate spaced apart from the first plate;
At least one first dipole member extending from the first plate;
At least one second dipole member extending from the second plate; And
And a feed cable arranged on the first plate,
The first plate having a first vertical portion and the second plate having a second vertical portion,
A second insert member having a first hole formed in the first vertical portion and a second hole formed in the second vertical portion,
Wherein an outer diameter of the feed cable is coupled to the first insert member in a state of being inserted into a first hole of the first insert member and an inner diameter of the feed cable is inserted into a second hole of the second insert member, An insert member coupled to the insert member,
The feed cable is not physically coupled directly to the first plate and the second plate, the outer core is welded to the first insert member and the inner core is welded to the second insert member,
Wherein the material of the first plate and the second plate is aluminum and the material of the first insert member and the second insert member is tin-
A plurality of plate coupling members for coupling the first plate and the second plate to the main body and allowing the feed cable to pass through the first plate to fix the feed cable,
And the plate joining member is not disposed around the first vertical portion. delete delete delete delete delete

Images