KR20110089901A - Multiband antenna appratus - Google Patents

Abstract

PURPOSE: A multiband antenna apparatus is provided to facilitate manufacturing process and assembly by simplifying the size of an antenna and making an antenna pattern an axial ratio symmetric. CONSTITUTION: In a multiband antenna apparatus, more than patch antennas are laminated and a feed part is arranged at four part of the more than two patch antennas respectively. A central hole(100) is commonly formed at more than patch antenna and controls the isolation characteristics between feed parts.

Description

Multiband Antenna Unit {MULTIBAND ANTENNA APPRATUS}

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to antenna technology, and more particularly, to stack a plurality of patch antennas in a stacked structure in order to provide multiband characteristics, and to a multiband antenna technology for forming a feed point and antenna pattern of each stacked antenna. will be.

 Microstrip antennas have a dielectric structure on a thin ground conductor plate and a conductor strip printed on it, which is popular in aerospace, military, and mobile communication.

These microstrip antennas are lightweight, ultra-compact and thin, and are being used in a variety of applications due to low cost and ease of installation by mass production using printed circuit manufacturing methods. .

In addition, the microstrip antenna can simultaneously design and fabricate various types of feed circuits for controlling the excitation state of the antenna element and each element on the microstrip substrate to perform beam shape adjustment and tracking without mechanical movement. can do. In particular, since the circular polarization characteristic required for receiving a broadcast signal can be manufactured on a single substrate without a separate deflector, it is more efficient.

On the other hand, in the conventional multi-band antenna device that implements the multi-band characteristics, the above-described patch antenna as a microstrip antenna is stacked, at this time, the feed point (Feed Point) of the stacked patch antenna is formed differently. For this reason, there is a problem that the antenna size increases, and the manufacturing process and assembly are complicated.

In addition, in the conventional multi-band antenna device, there is also a problem that the antenna efficiency is lowered due to the degradation of the isolation characteristics between the plurality of feed points.

In this context, an object of the present invention is to provide a multi-band antenna device having a small antenna size, symmetrical antenna pattern and axial ratio, and easy fabrication process and assembly.

In addition, another object of the present invention is to provide a multi-band antenna device that provides improved isolation characteristics.

In order to achieve the above object, in one aspect, the present invention, two or more patch antennas are stacked, each of the two or more patch antennas, multi-band antenna, characterized in that the feed point is formed at four same locations Provide a device.

In another aspect, the present invention, two or more patch antennas formed with four feed points are stacked, in order to control the isolation characteristics between the four feed points, each of the two or more stacked patch antennas, the center hole is common to And a via hole is formed around the center hole in common.

As described above, according to the present invention, in a stacked structure in which a plurality of patch antennas are stacked, the feed points of the patch antennas are formed identically, so that the antenna size is reduced, and the antenna pattern and the axial ratio are symmetrical characteristics. In addition, there is an effect of providing a multi-band antenna device to facilitate the manufacturing process and assembly.

In addition, according to the present invention, in a stacked structure in which a plurality of patch antennas are stacked, a via hole is formed around a center hole and a center hole in each patch antenna, thereby providing a multiband antenna device for improving isolation characteristics. .

1 is an exploded view of a multi-band antenna device according to an embodiment of the present invention.
2 is a diagram illustrating a first patch antenna in a multi-band antenna device according to an embodiment of the present invention.
3 is a view showing a second patch antenna in a multi-band antenna device according to an embodiment of the present invention.
4 is a diagram illustrating a coupler board in a multi-band antenna device according to an embodiment of the present invention.
5 is a side view of a multi-band antenna device according to an embodiment of the present invention.

The multi-band antenna device disclosed in the present invention has a structure in which two or more patch antennas are stacked and two or more patch antennas are provided with feed points at four same positions, and four feed pins are inserted. For example, in a multiband antenna device in which the first patch antenna and the second patch antenna are adapted, four feed points including F1, F2, F3, and F4 are formed in the first patch antenna, and the second patch antenna is formed in the second patch antenna. When four feed points including F1 ', F2', F3 'and F4' are formed, F1 and F1 'are formed at the same position so that the first feed pin can be inserted, and F2 and F2' are second feed. The pins are formed in the same position to be inserted, F3 and F3 'are formed in the same position so that the third feed pin can be inserted, and the F4 and F4' are formed in the same position so that the fourth feed pin can be inserted. It has a structure.

Due to this structure, the multiband antenna device disclosed in the present invention can reduce the number of feeds, facilitate patch processing, and reduce the antenna size.

In addition, in the multi-band antenna device disclosed in the present invention, two or more patch antennas having four feeding points are stacked, and in order to control the isolation characteristics between the four feeding points, each of the two or more stacked patch antennas includes a center hole The common holes may have a structure in which a via hole is formed around the center hole.

In addition, in the multi-band antenna device disclosed in the present invention, at each of the two or more patch antennas, feed points are formed at four same positions, and each of the four feed points formed may be formed at right angles (90 degrees). .

In addition, in the multi-band antenna device disclosed in the present invention, at least two patch antennas stacked in a stacked structure may include, for example, a global positioning system (GPS) L1 and a global navigation satellite system (GLONASS: GLObal NAvigation Satellite System). ) A patch antenna having frequency characteristics of L1 and Galileo system E1, a patch antenna having frequency characteristics of Global Positioning System (GPS) L2, and the like can receive a multiband signal. .

In addition, the multi-band antenna device disclosed in the present invention is equally applied to two or more patch antennas in order to implement circular polarization characteristics, that is, to receive circular polarization signals (eg, preferred member polarization, left member polarization, etc.). It may include a coupler board connected to one or more feed points formed, such coupler board may include a 90 degree coupler and a 180 degree coupler.

In addition, the multi-band antenna device disclosed in the present invention may further include a low noise amplifier (LNA) board for minimizing noise by receiving a circularly polarized signal.

The above-mentioned multiband antenna device may be a microstrip antenna device having a dielectric on a thin ground conductor plate and printed on the conductor strip and used for aerospace, military, and mobile communication.

According to the multi-band antenna device disclosed in the present invention described above, the antenna size can be reduced, the characteristics of the antenna pattern and the axial ratio can be formed symmetrically, and the isolation characteristics can be improved.

Hereinafter, some embodiments of the present invention will be described in detail through exemplary drawings. In adding reference numerals to the components of each drawing, it should be noted that the same reference numerals are assigned to the same components as much as possible even though they are shown in different drawings. In the following description of the present invention, a detailed description of known functions and configurations incorporated herein will be omitted when it may make the subject matter of the present invention rather unclear.

In addition, in describing the component of this invention, terms, such as 1st, 2nd, A, B, (a), (b), can be used. These terms are only for distinguishing the components from other components, and the nature, order or order of the components are not limited by the terms. If a component is described as being "connected", "coupled" or "connected" to another component, that component may be directly connected to or connected to that other component, but there may be another configuration between each component. It is to be understood that the elements may be "connected", "coupled" or "connected".

1 is an exploded view of a multi-band antenna device according to an embodiment of the present invention.

As exemplarily shown in FIG. 1, a multi-band antenna device according to an embodiment of the present invention has dielectrics 10 and 20 on a thin ground conductor plate 12 and 22 and a radiation patch 11 on it. 21 is assumed to be an antenna device including a microstrip patch antenna (1, 2).

In addition, as exemplarily shown in FIG. 1, the multi-band antenna device according to an embodiment of the present invention has two patch antennas stacked to receive a multi-band signal, and has the same position in two patch antennas. Assume that there are four feeding points F1, F2, F3, and F4. That is, the multi-band antenna device according to an embodiment of the present invention illustrated in FIG. 1 by way of example, a multi-band antenna of the four-feed (Feed) technique using four identical feed points (F1, F2, F3, F4) Device.

Referring to FIG. 1, a multi-band antenna device according to an embodiment of the present invention includes a stack of two patch antennas, a first patch antenna 1 and a second patch antenna 2, and a coupler board 3. It has a laminated structure. Here, when the multi-band antenna device according to an embodiment of the present invention is used for GPS / GLONASS / Gallieo satellite signal reception, in order to receive a multi-band satellite signal, as an example, the first patch antenna (1) Denotes a patch antenna of GPS L1, GLONASS L1, and Galileo E1 characteristics, and the second patch antenna 2 may be a patch antenna of GPS L2 characteristics.

Referring to FIG. 1, in a multi-band antenna device according to an embodiment of the present invention, four feed points F1 and F2 are provided at the first patch antenna 1, the second patch antenna 2, and the coupler board 3. , F3, F4, 102 are formed at a 90 degree angle. The first patch antenna 1, the second patch antenna 2, and the coupler board 3 stacked on the four feed points F1, F2, F3, F4, and 102 using a feeding pin 110. ).

Referring to FIG. 1, the center of each of the first patch antenna 1, the second patch antenna 2, and the coupler board 3 has a constant diameter in order to improve degradation of isolation characteristics between the four feed points 102. The center hole 100 is drilled in common, and twelve via holes 101 are drilled in the periphery of the center hole 100 in each of the first patch antenna 1 and the second patch antenna 2.

Hereinafter, the structure of the first patch antenna 1, the second patch antenna 2, and the coupler board 3 will be described with reference to FIGS. 2, 3, and 4, respectively.

2 is a view showing the front, back and side surfaces of the first patch antenna 1 in the multi-band antenna device according to an embodiment of the present invention. For example, the first patch antenna 1 may be a patch antenna having frequency characteristics of GPS L1, GLONASS L1, and Galileo E1.

2, in a multi-band antenna device according to an embodiment of the present invention, the first patch antenna 1 includes a dielectric 10, which is an insulator having a predetermined thickness, and a conductor formed on a lower surface of the dielectric 10. It has a structure consisting of a ground conductor 12 and a radiation patch 11 formed of a conductor on the dielectric 10.

2, the first patch antenna 1 in the multi-band antenna device according to an embodiment of the present invention, the characteristics of the isolation between the four feed points (F1, F2, F3, F4, 102) In order to improve, the center hole 100 and the via hole 102 are configured.

2, when the first patch antenna 1 of the multi-band antenna device according to the embodiment of the present invention is a patch antenna having frequency characteristics of GPS L1, GLONASS L1, and Galileo E1, GPS is used. To determine the resonant frequencies of L1, GLONASS L1, and Galileo E1, the width W and length L of the radiation patch 11 can be adjusted. In addition, in order to adjust the impedance characteristic and the isolation characteristic, the position or number of the feed points F1, F2, F3, F4, 102 may be adjusted, or the distance from the center to the via hole 101 may be adjusted. That is, the width W and the length L of the radiation patch 11, the distance from the center to the feed points F1, F2, F3, F4, 102, the distance from the center to the via hole 101 and the via hole By appropriately adjusting the size of the 101 and the size of the center hole 100, desired resonance frequency and impedance characteristics can be obtained.

2, when the first patch antenna 1 and the second patch antenna 2 are stacked, the copper foil of the ground conductor 12 of the first patch antenna 1 and the second patch antenna ( The ground conductor 12 of the first patch antenna 1 and the radiation patch 21 of the second patch antenna 20 are fed to the feed pin 110 in such a manner as to eliminate the copper foil of the radiation patch 21 of 20. By not connecting, the ground patch 12 of the first patch antenna 1 and the radiation patch 21 of the second patch antenna 20 are separated. 2 shows that the copper foil of the ground conductor 12 of the first patch antenna 1 is removed.

3 is a view showing the front, back and side surfaces of the second patch antenna 2 in the multi-band antenna device according to an embodiment of the present invention. The second patch antenna 2 exemplarily shown in FIG. 3 may be a patch antenna of GPS L2 characteristic.

Referring to FIG. 3, the second patch antenna 2 of the multi-band antenna device according to the exemplary embodiment of the present invention may include a dielectric 20, which is an insulator having a predetermined thickness, and a lower surface of the dielectric 20 as a conductor. It has a structure consisting of the ground conductor 22 formed and the radiation patch 21 formed of a conductor on the dielectric 20.

3, the second patch antenna 2 in the multi-band antenna device according to an embodiment of the present invention, the same as the first patch antenna 1, each of the four feed points (F1, F2) In order to improve the characteristics of the isolation between the (F3, F4, 102)), the center hole 100 and the via hole 101 is configured.

Referring to FIG. 3, when the second patch antenna 2 is a patch antenna having GPS L2 characteristics, the width W and the length L of the radiation patch 21 are adjusted to determine the resonance frequency of the GPS L2. Can be.

Referring to FIG. 3, in order for the first patch antenna 1 and the second patch antenna 2 to use the same feed point F1, F2, F3, F4, 102, the first patch antenna 1 and the first patch antenna 1 and the second patch antenna 2 are used. In order to determine the isolation characteristics of the second patch antenna 2, the impedance, the resonant frequency and the feeding points F1, F2, F3, F4, 102 by stacking the two patch antennas 2, Via holes 101 and feed points F1, F2, F3, F4, 102 and the like are determined at the same position as in the first patch antenna 1 of FIG.

3, when stacking the first patch antenna 1 and the second patch antenna 2, the copper foil of the ground conductor 12 of the first patch antenna 1 and the second patch antenna ( The ground conductor 12 of the 1 patch antenna 1 and the radiation patch 21 of the second patch antenna 20 are connected to the feed pin 110 by removing the copper foil of the radiation patch 21 of the 20. By not doing so, the ground conductor 12 of the first patch antenna 1 and the radiation patch 21 of the second patch antenna 20 are separated. 3 shows that the copper foil of the radiation patch 21 of the second patch antenna 2 is removed.

1 to 3, the first patch antenna 1 and the second patch antenna 2 are stacked, and the coupler board 3 is positioned under the second patch antenna 2. This coupler board 3 is shown in FIG.

4 is a view showing the front, back and side of the coupler board 3 in the multi-band antenna device according to an embodiment of the present invention. The front side of the coupler board 3 is composed of the dielectric 31, and the back side is composed of the ground conductor 32.

Referring to FIG. 4, the coupler board 3 is connected to four feed points F1, F2, F3, F4, 102 to receive circular polarization (eg, preferred member polarization (RHCP), etc.). In this case, the circularly polarized signal may be obtained at 440, and the circularly polarized signal thus obtained may be input to the low noise amplifier board.

In the conventional multi-band antenna device, the first patch antenna 1 and the second patch antenna 2 use different feed points, so that a total of eight feed points were required, compared to the multiplicity according to an embodiment of the present invention. In the band antenna device, the first patch antenna 1 and the second patch antenna 2 use the same four feed points F1, F2, F3, F4, and 102, so that the coupler board 3 and the low noise amplifier board The effect of reducing the size can also be obtained.

1 and 4, four feed points F1, F2, F3, F4, and 102 drill holes through the dielectrics 10 and 20, and use the feeding pins 110 in the drilled holes. The first patch antenna 1, the second patch antenna 2, the coupler board 3, and the low noise amplifier board may be connected.

Referring to FIG. 4, in order to implement circular polarization characteristics, the coupler board 3 connected to four feed points F1, F2, F3, F4 and 102 may include a 90 degree coupler 410 and 420 and a 180 degree coupler. 440 may include.

5 is a side view of a multi-band antenna device according to an embodiment of the present invention, in which the first patch antenna 1, the second patch antenna 2, and the coupler board 3 are stacked. In the drawings in detail.

As described above, according to the present invention, in the stacked structure in which the plurality of patch antennas 1 and 2 are stacked, the feed point 102 of each patch antenna 1 and 2 is formed identically, thereby reducing the antenna size. In addition, the antenna pattern and the axial ratio are symmetrical characteristics, and there is an effect of providing a multi-band antenna device that facilitates the manufacturing process and assembly. In addition, using the symmetrical characteristics of the antenna pattern and the axial ratio of the multi-band antenna device disclosed in the present invention, it is highly useful as a positioning system and an antenna for receiving a satellite signal.

In addition, according to the present invention, in the stacked structure in which a plurality of patch antennas 1 and 2 are stacked, the via hole 101 around the center hole 100 and the center hole 100 in each patch antenna 1 and 2. Thereby, there is an effect of providing a multi-band antenna device for improving the isolation characteristics.

In the above description, all elements constituting the embodiments of the present invention are described as being combined or operating in combination, but the present invention is not necessarily limited to the embodiments. In other words, within the scope of the present invention, all of the components may be selectively operated in combination with one or more. In addition, although all of the components may be implemented in one independent hardware, each or all of the components may be selectively combined to perform some or all functions combined in one or a plurality of hardware. It may be implemented as a computer program having a. Codes and code segments constituting the computer program may be easily inferred by those skilled in the art. Such a computer program may be stored in a computer readable storage medium and read and executed by a computer, thereby implementing embodiments of the present invention. The storage medium of the computer program may include a magnetic recording medium, an optical recording medium, a carrier wave medium, and the like.

In addition, the terms "comprise", "comprise" or "having" described above mean that the corresponding component may be included, unless otherwise stated, and thus excludes other components. It should be construed that it may further include other components instead. All terms, including technical and scientific terms, have the same meanings as commonly understood by one of ordinary skill in the art unless otherwise defined. Terms commonly used, such as terms defined in a dictionary, should be interpreted to coincide with the contextual meaning of the related art, and shall not be construed in an ideal or excessively formal sense unless explicitly defined in the present invention.

The foregoing description is merely illustrative of the technical idea of the present invention, and various changes and modifications may be made by those skilled in the art without departing from the essential characteristics of the present invention. Therefore, the embodiments disclosed in the present invention are not intended to limit the technical idea of the present invention but to describe the present invention, and the scope of the technical idea of the present invention is not limited by these embodiments. The protection scope of the present invention should be interpreted by the following claims, and all technical ideas within the equivalent scope should be interpreted as being included in the scope of the present invention.

1: first patch antenna
2: 2nd patch antenna
3: coupler board
10, 20, 31: dielectric
11, 21: spinning patch
12, 22, 32: grounding conductor
100: center hall
101: Via Hole
102: feed point
410, 420: 90 degree coupler
430: 180 degree coupler

Claims (8)

Two or more patch antennas are stacked,
Each of the two or more patch antennas, the multi-band antenna device, characterized in that the feed point is formed in four places. The method of claim 1,
In order to control the isolation characteristic between the formed feed point,
Each of the two or more patch antennas,
The center hole is formed in common, and the multi-band antenna device characterized in that the via hole (Via Hole) is formed in common around the center hole. The method of claim 1,
Each of the two or more patch antennas, the multi-band antenna device, characterized in that formed at right angles to the feed point in four places. The method of claim 1,
The two or more patch antennas,
A patch antenna having frequency characteristics of Global Positioning System (GPS) L1, GLObal NAvigation Satellite System (GLONASS) L1, and Galileo System E1,
Patch antenna with frequency characteristics of Global Positioning System (GPS) L2
Multiband antenna device comprising a. The method of claim 1,
The multi-band antenna device,
A multiband antenna device, characterized in that the microstrip antenna device. The method of claim 1,
And a coupler board connected to the feed point for receiving a circularly polarized signal. The method of claim 6,
The multi-band antenna device,
And a low noise amplifier board receiving the circularly polarized signal to minimize noise. Two or more patch antennas with four feed points are stacked,
In order to control the isolation characteristics between the four feed points, each of the stacked two or more patch antennas,
The center hole is formed in common, and the multi-band antenna device characterized in that the via hole (Via Hole) is formed in common around the center hole.

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