KR101356429B1 - Dual band antenna device - Google Patents

Abstract

The present invention relates to a dual band antenna device, comprising a first antenna unit having a first size including a plurality of slot antennas operating in a first frequency band, and a plurality of half slot antennas operating in a second frequency band. And a second antenna portion of a second size, wherein the first antenna portion and the second antenna portion are integrated on a plane having the second size.
Accordingly, by providing a dual band antenna device in which a plurality of slot antennas are integrated in a plane in which a plurality of half slot antennas are integrated, a transmission capacity can be increased in a limited space using a deviator diversity and an antenna multiplexing technique. There is an advantage to overcome the constraints of the antenna installation space.

Description

Dual Band Antenna Unit {DUAL BAND ANTENNA DEVICE}

The present invention relates to a dual band antenna device, and more particularly, to a dual band antenna device in which a plurality of slot antennas and a plurality of half slot antennas are integrated on a single plane.

As is known, the slot antenna mainly uses a structure in which a straight slot of a certain size is dug out into a flat metal plate. Looking at the relationship between the length (L), the width (d) and the wavelength (λ) of the linear slot in such a slot antenna, L = λ / 2, d <<λ, the width (d) has a very short structural features.

Since such a slot antenna is large in size to be integrated in a limited space, a spiral slot may be used to further reduce the size of the slot antenna.

Slot antennas using spiral slots are arranged on a flat metal plate with a straight slot with short boundary conditions at both ends, and two spiral slots arranged on both ends of the straight slot to be symmetrical with respect to the straight slot. It is a structure having a spiral slot. Here, the helical slot acts as an inductor, thereby making a miniaturized slot antenna having a constant resonance frequency while reducing the length of the slot.

Meanwhile, the slot antenna using the spiral slot can be further miniaturized using the half slot antenna structure.

The basic half-slot antenna has a flat metal plate with straight slots, one of which is short and one of which is open. Therefore, radiation occurs at a frequency of λ = 4 · L. In this half-slot antenna, two spiral slots can be arranged to be symmetrical with respect to the straight slot at one end of the straight slot at both ends of the straight slot, thereby making the size smaller.

Although research efforts for miniaturizing slot antennas and half slot antennas have been continued in accordance with these conventional techniques, they are facing limitations, and both slot antennas and half slot antennas are installed, such as base stations of a mobile communication system using dual bands. In the environment to be installed, there is a problem that it is difficult to install the slot antenna and the half slot antenna, respectively, due to the limited installation space.

Registration No. 10-047001, published February 4, 2005.

The present invention has been proposed to solve the problems of the prior art as described above, and provides a dual band antenna device in which a plurality of slot antennas are integrated together in a plane in which a plurality of half slot antennas are integrated, thereby limiting the antenna installation space. To overcome.

According to an aspect of the present invention, a dual band antenna device includes a first antenna unit having a first size including a plurality of slot antennas operating in a first frequency band, and a plurality of half slot antennas operating in a second frequency band. And a second antenna unit having a second size, wherein the first antenna unit and the second antenna unit are integrated on a plane having the second size.

Here, the second antenna unit, the first half-slot antenna and the fourth half-slot antenna is integrated in each of the four corner regions of the square plane having a size of λ / 2, the first antenna unit, the center of the square plane In comparison with the point, the first slot antenna and the second slot antenna may be integrated in a central rectangular area where the center point coincides.

The first antenna portion, when setting one orthogonal axis on the square plane having the first size and thereby dividing into first to fourth quadrants, the first slot antenna is integrated in the first quadrant and the third quadrant The second slot antenna may be integrated in the second slot antenna, or the first slot antenna may be integrated in the second quadrant and the second slot antenna may be integrated in the fourth quadrant.

The first slot antenna and the second slot antenna, when setting one horizontal axis (or vertical axis) on any one of the first to fourth quadrants, thereby dividing the first and second slot antennas into first and second And a straight slot having a boundary condition of both ends is disposed on the horizontal axis (or a vertical axis), and the first bisection and the second biplane are symmetrical with respect to the horizontal axis (or the vertical axis) at both ends of the straight slot. Spiral slots may each be disposed in the quadrant.

The first half slot antenna and the fourth half slot antenna have a horizontal axis (or vertical axis) when setting one horizontal axis (or vertical axis) on the corner region and thereby dividing the first half and second half planes. The boundary condition at one end is short and the boundary condition at the other end is open, and a straight slot is disposed, and the horizontal axis (or Spiral slots may be disposed in the first and second biplanes so as to be symmetric with respect to the vertical axis).

The first half slot antennas and the fourth half slot antennas may be arranged such that the ends of the straight slots having the boundary condition open toward different directions.

According to an embodiment of the present invention, by providing a dual band antenna device in which a plurality of slot antennas are integrated together in a plane in which a plurality of half slot antennas are integrated, a transmission capacity using a deflection diversity and an antenna multiplexing technique in a limited space, etc. It can be increased to overcome the constraints of the antenna installation space.

1 is a block diagram of a dual band antenna device according to an embodiment of the present invention.
2 is a configuration diagram of a first antenna unit having a slot antenna structure included in a dual band antenna device according to an exemplary embodiment of the present invention.
3 is a diagram illustrating a slot antenna structure of a first antenna unit included in a dual band antenna device according to an exemplary embodiment of the present invention.
4 is a configuration diagram of a second antenna unit having a half slot antenna structure included in a dual band antenna device according to an exemplary embodiment of the present invention.
5 is a block diagram illustrating a half slot antenna structure of a second antenna unit included in a dual band antenna device according to an exemplary embodiment of the present invention.
6 is a characteristic graph of the S-parameters of a single slot antenna radiating at 26.6 GHz.
7 is a characteristic graph of the S-parameters of a single half slot antenna radiating at 1.98 GHz.
8 is a characteristic graph of a 26 GHz band S-parameter by the dual band antenna device according to an exemplary embodiment of the present invention.
9 is a characteristic graph of 26 GHz band interference by the dual band antenna device according to the embodiment of the present invention.
10 is a characteristic graph of a 2 GHz band S-parameter by the dual band antenna device according to an embodiment of the present invention.
11 is a characteristic graph of the 2 GHz band interference amount by the dual band antenna device according to an embodiment of the present invention.
12 is a configuration diagram of a dual band antenna device according to another embodiment of the present invention.
13 is a configuration diagram of a dual band antenna device according to another embodiment of the present invention.

BRIEF DESCRIPTION OF THE DRAWINGS The advantages and features of the present invention and the manner of achieving them will become apparent with reference to the embodiments described in detail below with reference to the accompanying drawings. The present invention may, however, be embodied in many different forms and should not be construed as being limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the concept of the invention to those skilled in the art. Is provided to fully convey the scope of the invention to those skilled in the art, and the invention is only defined by the scope of the claims.

In describing the embodiments of the present disclosure, when it is determined that a detailed description of a known function or configuration may unnecessarily obscure the subject matter of the present disclosure, the detailed description thereof will be omitted. Terms to be described below are terms defined in consideration of functions in the embodiments of the present invention, and may vary according to intentions or customs of users or operators. Therefore, the definition should be based on the contents throughout this specification.

1 is a block diagram of a dual band antenna device according to an embodiment of the present invention.

As shown therein, the dual band antenna device 100 includes a first antenna unit 110 having a first size including a plurality of slot antennas operating in a first frequency band, and a plurality of harps operating in a second frequency band. A second antenna unit 120 having a second size including a slot antenna is included, and the first antenna unit 110 and the second antenna unit 120 are integrated on a plane having a second size.

In the dual band antenna device 100, the second antenna unit 120 is disposed on a square plane having a size of one side having a length of 75 mm (λ / 2), and the first antenna unit 110 is a second antenna unit. 120 is integrated together in a square plane having a size of 5.47 mm (0.47 lambda) in one side disposed in the integrated square plane.

To this end, the second antenna unit 120 is integrated with one first half slot antenna or one fourth half slot antenna in four corner regions of a square plane having a size of λ / 2, and the first antenna unit 110 When compared with the center point of the square plane, the first slot antenna and the second slot antenna are integrated in the center rectangular area where the center point coincides.

2 is a configuration diagram of a first antenna unit 110 having a slot antenna structure included in a dual band antenna device according to an exemplary embodiment of the present invention.

As shown in the drawing, when the first antenna unit 110 sets one orthogonal axis on a square plane having a first size and thereby divides it into the first to fourth quadrants, the first slot antenna 111 in the first quadrant. ) May be integrated and the second slot antenna 113 may be integrated in the third quadrant.

Alternatively, as another embodiment, the first slot antenna 111 may be integrated in the second quadrant and the second slot antenna 113 may be integrated in the fourth quadrant. This will be described again with reference to FIG. 13.

3 is a block diagram illustrating a slot antenna structure of the first antenna unit 110 included in the dual band antenna device according to an exemplary embodiment of the present invention. The first slot antenna 111 and the second slot antenna 113 are Having the same structure, the first slot antenna 111 is representatively shown.

As shown therein, when the first slot antenna 111 sets one horizontal axis (or vertical axis) on any of the first to fourth quadrants, thereby dividing it into the first and second biplanes, The first biplane and the second slot are arranged on the horizontal axis (or vertical axis) so that the straight slots 111a having the boundary conditions at both ends are short, and are symmetrical with respect to the horizontal axis (or the vertical axis) at both ends of the straight slot 111a. The spiral slots 111b are disposed in two bisections, respectively. The first slot antenna 111 may be disposed on a square plane having a side length of 2.72 mm (0.24 λ).

4 is a configuration diagram of a second antenna unit 120 having a half slot antenna structure included in a dual band antenna device according to an embodiment of the present invention, and FIG. 5 is a dual band antenna device according to an embodiment of the present invention. It is a block diagram showing a half-slot antenna structure of the second antenna unit 120 included in 100. The first half slot antenna 121 to the fourth half slot antenna 129 have the same structure, and the first half slot antenna 121 is representatively shown in FIG. 5.

As shown in the drawing, the second antenna unit 120 includes the first half slot antenna 121 to the fourth half slot antenna 129 at four corner regions in a square plane having a length of 75 mm (0.5λ). Are integrated one by one, and each of the first half slot antennas 121 to the fourth half slot antennas 129 sets one horizontal axis (or vertical axis) on one corner region, whereby the first bisector and the second When dividing into two halves, a straight slot 121a is arranged in which the boundary condition of one end 121aa is short on the horizontal axis (or vertical axis) and the boundary condition of the other end 121ab is open. Spiral slots 121b are disposed in the first and second biplanes so as to be symmetrical with respect to the horizontal axis (or vertical axis) at one end 121aa whose boundary condition is a short circuit among both ends of the straight slot 121a. do. Here, in the corner regions where the first half slot antennas 121 to the fourth half slot antennas 129 are formed, the length direction of the straight slot 121a is 22 mm (0.146λ) and the width direction of the straight slot 121a is 24 mm. It has a rectangular planar shape of (0.146λ).

When the antenna multiplexing technique is applied to increase transmission capacity in the dual band antenna structure, the mutual distance between the antennas should be about λ / 2 apart. Suggest. As described above with reference to FIGS. 1 to 4, the dual band antenna device 100 according to an exemplary embodiment of the present invention includes a plurality of slot antennas 111 and 113 on a square plane having a size of one side of λ / 2. ) And the plurality of half slot antennas 121, 123, 125, and 129 are integrated together, so that the half slot antennas 121, 123, 125, and 129 radiate in the 2 Ghz band, and the slot antennas 111 and 113 are in the 26 Ghz band. Emitted in dual band operation.

6 is a characteristic graph of S-parameters of a single slot antenna radiating at 26.6 GHz, and FIG. 7 is a characteristic graph of S-parameters of a single half slot antenna radiating at 1.98 GHz.

According to an embodiment of the present invention, a single slot antenna included in the first antenna unit 110 radiates at 26.6 GHz so that the S1,1 parameter has a characteristic graph as shown in FIG. 6, and the second antenna unit 120 is provided. The single half-slot antenna included in radiates at 1.98 GHz so that the S1,1 parameter has a characteristic graph as shown in FIG.

8 is a characteristic graph of 26 GHz band S-parameters by the dual band antenna device according to an exemplary embodiment of the present invention, and FIG. 9 is a characteristic graph of 26 GHz band interference amount by a dual band antenna apparatus according to an exemplary embodiment of the present invention. 10 is a characteristic graph of a 2 GHz band S-parameter by the dual band antenna device according to an embodiment of the present invention, and FIG. 11 is a diagram of a 2 GHz band interference amount by the dual band antenna device according to an embodiment of the present invention. Characteristic graph.

In the case of integrating a plurality of slot antennas and a plurality of half slot antennas together in a limited space as in the embodiment of the present invention, interference between the antennas may be a problem, according to an embodiment of the present invention, as shown in FIGS. 1 to 5. By arranging the half slot antennas in the four corner regions and the slot antenna in the center region within a 0.5λ space, the interference proportional to the distance between the antennas can be reduced as much as possible.

When arranging the first half slot antenna 121 to the fourth half slot antenna 129 included in the second antenna unit 120 according to an embodiment of the present invention, as shown in FIGS. 1 and 5, a straight slot is shown. By arranging the ends 121ab having open boundary conditions toward different directions among the two ends of 121a, the amount of interference between the antennas can be further reduced, and polarization diversity is achieved because each antenna generates vertical and horizontal polarizations. Can increase the transmission capacity.

The dual-band antenna device 100 according to the embodiment of the present invention can obtain the S1,1 parameter characteristics as shown in FIG. 8 and the interference amount as shown in FIG. 9 in the 26 GHz band. Has bandwidth. In the 2 GHz band, the S1,1 parameter characteristics as shown in FIG. 10 and the interference amount as shown in FIG. 11 can be obtained, and have a bandwidth of 33 MHz (1.6%) at a center frequency of 2.05 GHz.

12 is a configuration diagram of a dual band antenna device according to another embodiment of the present invention. As shown in the drawing, the second antenna unit 120 'included in the dual band antenna device 100' according to another embodiment of the present invention may be partially disposed when arranging the first half slot antenna to the fourth half slot antenna. The half-slot antenna may be arranged such that the ends of the straight slots having the boundary condition open toward the same direction.

13 is a configuration diagram of a dual band antenna device according to another embodiment of the present invention. As shown in the drawing, the first antenna unit 110 ′ included in the dual band antenna device 100 ″ according to another embodiment of the present invention sets one orthogonal axis on a square plane having a first size and thereby When divided into the first to fourth quadrants, slot antennas may be integrated in the second and fourth quadrants, respectively. In addition, referring to FIG. 3, the straight slot 111a may be disposed on the horizontal axis, but may also be disposed on the vertical axis.

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 intended to illustrate rather than limit the scope of the present invention, and the scope of the technical idea of the present invention is not limited by these embodiments. The scope of protection of the present invention should be construed according to the following claims, and all technical ideas within the scope of equivalents should be construed as falling within the scope of the present invention.

100: dual band antenna device 110: first antenna unit
111: first slot antenna 113: second slot antenna
120: second antenna portion 121: first half slot antenna
123: second half slot antenna 125: third half slot antenna
129: fourth half-slot antenna

Claims (6)

delete A first antenna unit having a first size including a plurality of slot antennas operating in a first frequency band;
A second antenna part of a second size including a plurality of half slot antennas operating in a second frequency band,
The first antenna unit and the second antenna unit are integrated on a plane having the second size,
The second antenna unit, the first half-slot antenna and the fourth half-slot antenna is integrated in each of the four corner regions of the square plane having a size of λ / 2,
The first antenna unit may include a first slot antenna and a second slot antenna integrated in a central rectangular area where the center point coincides with the center point of the square plane.
Dual band antenna device.
3. The method of claim 2,
The first antenna unit,
When setting one orthogonal axis on the square plane having the first size and thereby dividing into first to fourth quadrants, the first slot antenna is integrated in the first quadrant and the second slot antenna in the third quadrant. Or the first slot antenna is integrated in a second quadrant and the second slot antenna is integrated in a fourth quadrant.
Dual band antenna device.
The method of claim 3, wherein
The first slot antenna and the second slot antenna,
When setting one horizontal axis (or vertical axis) on any of the first to fourth quadrants and thereby dividing it into the first and second biplanes, a boundary condition of both ends is formed on the horizontal axis (or vertical axis). Short straight slots are disposed, and spiral slots are disposed at both first and second biplanes so as to be symmetrical with respect to the horizontal axis (or vertical axis) at both ends of the straight slots.
Dual band antenna device.
3. The method of claim 2,
The first half slot antenna to the fourth half slot antenna,
When setting one horizontal axis (or vertical axis) on the corner region and thereby dividing it into the first and second biplanes, the boundary condition of one end on the horizontal axis (or vertical axis) is short and the other The boundary condition at one end is arranged with an open straight slot, and the first half face and the first biplane are arranged so as to be symmetrical with respect to the horizontal axis (or vertical axis) at one end of each of the ends of the straight slot where the boundary condition is a short circuit. 2 spiral slots each
Dual band antenna device.
The method of claim 5, wherein
The first half slot antenna to the fourth half slot antenna,
Of the ends of the straight slot is arranged so that the end of the boundary condition is open in a different direction
Dual band antenna device.

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