KR101093802B1 - Antenna for bidirectional beam diversity - Google Patents

Abstract

The present invention relates to an antenna for bidirectional beam diversity.

The antenna for bidirectional beam diversity of the present invention includes a radiation layer, a feed layer and a dielectric layer. The radiation layer transfers power through a transmission pattern formed in a meander shape in a symmetrical direction with respect to the open pattern, and forms a bidirectional beam by controlling the inclination of the radiation pattern formed in the form of a bow tie connected to the transmission pattern. The feed layer supplies power through a feed pattern that is vertically bonded to the transfer pattern. The dielectric layer is located between the emitting layer and the feed layer and transfers power supplied from the feed layer to the emitting layer.

Bow-tie, meander, multiband antenna (MIMO), diversity

Description

ANTANA FOR BOTH SIDES BEAM DIVERSITY

The present invention relates to an antenna for bidirectional beam diversity, and more particularly, to an antenna capable of securing bidirectional beam diversity using a bow-tie and a meander pattern.

As the wireless communication service is diversified, many types of wireless communication circuits are integrated in the terminal, and thus multimode and multibandization are required. To this end, the use of a multi-band broadband radio frequency (RF) and a multi-band antenna (MIMO) is required, but since the terminal is limited in volume, it is difficult to realize space diversity. In order to apply a multiband antenna (MIMO) in such a terminal, it is necessary to obtain a polarization diversity or a beam direction diversity to select a beam direction to obtain a reception signal having low correlation.

On the other hand, an antenna using a bow-tie pattern has a very wide band characteristic and is suitable for a multiband antenna (MIMO). In order to apply the antenna using the bow-tie pattern to a multi-band antenna (MIMO), the length of the entire antenna pattern including the length of the slot feeder portion of the bow-tie pattern is one. It must be above the wavelength, ensuring space diversity for use in the 1.7 GHz to 2.5 GHz band, including personal communication services (PCS), high speed downlink packet access (HSDPA), WiBro, and Nespot. There is a difficult problem.

Accordingly, a technique for securing polarization diversity or beam direction diversity in a volume-limited terminal by applying a bow-tie pattern to a multiband antenna (MIMO) is required.

The technical problem to be achieved by the present invention is to use a double-sided bow-tie pattern radiating part and meander slot line which is bilaterally symmetrical to enable bidirectional beam direction diversity. The present invention relates to an antenna applicable to a band antenna (MIMO).

According to an aspect of the present invention, an antenna for bidirectional beam diversity is formed in a meander shape symmetrically with respect to an open pattern, and has a transmission pattern connected to the open pattern and a power pattern connected to the transmission pattern. And a radiation pattern formed in the form of a bow tie, the radiation layer forming a bidirectional beam by adjusting the slope of the radiation pattern, and a power supply for supplying power to the transmission pattern through a power supply pattern vertically bonded to the transmission pattern. And a dielectric layer positioned between the emission layer and the feed layer and transferring power supplied from the feed layer to the emission layer.

In addition, an antenna for bidirectional beam diversity according to another aspect of the present invention is an opening pattern, one end is connected to the opening pattern, the first transmission pattern is formed on the left side around the opening pattern, one end to the first transmission pattern The first radiation pattern is connected and is formed in the form of a bow tie, one end is connected to the opening pattern, and one end is connected to the second transmission pattern and the second transmission pattern formed on the right side of the opening pattern and the bow tie form A radiation layer including a second radiation pattern formed in the center, formed on the left side of the opening pattern, and formed on the right side of the first feeding pattern and the opening pattern bonded at the first point and the first transfer pattern; A feed layer including a second feed pattern bonded to the second transfer pattern and a second point, and formed between the radiation layer and the feed layer, And a dielectric layer for transferring power supplied from the feed layer to the emission layer.

In addition, the antenna for bidirectional beam diversity according to another feature of the present invention is an open pattern, a first transmission pattern of the meander shape is formed on the left side of the opening pattern, the end is connected to the opening pattern, the first A first radiation pattern, one end of which is connected to the first transmission pattern and formed in the form of a bow tie, a second transmission pattern of the meander shape, the second end of which is connected to the opening pattern and formed on the right side of the opening pattern, and the second transmission pattern. A radiation layer including a second radiation pattern having one end connected to the pattern and formed in a bow tie shape, a first feed formed on a left side of the opening pattern and vertically bonded at the first point with the first transfer pattern A first short circuit pattern having one end connected to the pattern, the first feed pattern, and having a predetermined center angle, and formed on the right side of the opening pattern, A feed layer including a second feed pattern vertically bonded at a pattern and a second point, and a second short circuit pattern having one end connected to the second feed pattern and having a predetermined center angle, and between the radiation layer and the feed layer And a dielectric layer configured to transfer power supplied from the feed layer to the emission layer.

According to an embodiment of the present invention, a bidirectional beam is formed to enable beam direction diversity, and a radiator having a bidirectional bow-tie pattern and a meander slot line are used. Two-way beam diversity can be secured and applied to a multi-band antenna (MIMO). Accordingly, the characteristics of the broadband and multiband antennas required for the wireless communication service can be satisfied.

In addition, according to an embodiment of the present invention, a flat-panel miniaturized antenna can be generated using a bow-tie pattern.

DETAILED DESCRIPTION Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings so that those skilled in the art may easily implement the present invention. The present invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. In the drawings, parts irrelevant to the description are omitted for simplicity of explanation, and like reference numerals designate like parts throughout the specification.

Throughout the specification, when a part is said to "include" a certain component, it means that it can further include other components, without excluding other components unless specifically stated otherwise.

1 is a diagram schematically illustrating an antenna for bidirectional beam diversity according to an embodiment of the present invention.

As shown in FIG. 1, an antenna 1 according to an embodiment of the present invention includes an emission layer 100, a dielectric layer 200, and a power supply layer 300.

The emission layer 100 is positioned at the top of the antenna 1 to secure bidirectional beam diversity, and is formed in consideration of bandwidth and reflection characteristics so that broadband characteristics and multiband antenna characteristics can be shown. The dielectric layer 200 is positioned between the emission layer 100 and the power supply layer 300 and serves to maintain and transmit power supplied from the power supply layer 300 to the emission layer 100. The feed layer 300 supplies power through the dielectric layer 200 to allow the emission layer 100 to operate.

Hereinafter, a structure of an antenna for bidirectional beam diversity according to an embodiment of the present invention will be described in detail with reference to FIGS. 2 to 5.

FIG. 2 is a diagram schematically illustrating a radiation layer of the antenna illustrated in FIG. 1, and FIG. 3 is a diagram illustrating frequency band characteristics according to a change of an exponential function coefficient at a radiation portion of the radiation layer illustrated in FIG. 2.

As shown in FIG. 2, the emission layer 100 includes a conversion unit 110 and emission units 120 and 130. The slot pattern of the open part 111 and the transfer pattern 112, 113 of the converter 110 according to an embodiment of the present invention is opened by removing the conductor portion forming the converter 110. And a radiation pattern 121 of the radiating part 120 and a radiation pattern 131 of the radiating part 130 are also removed by removing a conductor portion forming the radiating parts 120 and 130. slot line).

The conversion unit 110 includes an open pattern 111, a transfer pattern 112 formed on the left side and a transfer pattern 113 formed on the right side with respect to the open pattern 111.

The open pattern 111 is formed in a circular shape and is opened to maximize the impedance of the transfer patterns 112 and 113. That is, since the open pattern 111 should be shown to be open in order to transfer power transmitted from the feed pattern of the feed layer (shown in FIG. 4) without loss, the circular slot pattern is connected to the transfer patterns 112 and 113 on both sides. Is formed.

The transmission patterns 112 and 113 are set to have a length proportional to one wavelength and are formed in a meander shape that is bent as much as possible without affecting transmission and reception of a signal. The transmission pattern 112 is formed at the left side with respect to the open pattern 111, and the transmission pattern 113 is formed at the right side with respect to the open pattern 111.

The radiation unit 120 includes a radiation pattern 121 in the form of a bow-tie, and the radiation pattern 121 is connected to the transmission pattern 112 of the conversion unit 110. In this case, the bandwidth and the reflection characteristic of the frequency generated by the radiator 120 are determined according to the degree of increase or decrease of the slope of the openings 121a and 121b of the radiation pattern 121. The radiation unit 130 includes a radiation pattern 131 in the form of a bow tie, and the radiation pattern 131 is connected to the transmission pattern 113 of the conversion unit 110. At this time, the openings 131a and 131b of the radiation pattern 131 also determine the bandwidth and the reflection characteristic of the frequency generated by the radiation unit 130 according to the degree of increase or decrease of the slope.

The openings 121a and 121b of the radiating part 120 and the openings 131a and 131b of the radiating part 130 according to the exemplary embodiment of the present invention gradually increase or decrease according to the change of the coefficient of the exponent term of the exponential function. An example of an exponential function is shown in Equation (1).

Where R represents the coefficient of the exponential term of the exponential function, X represents the horizontal axis, Y represents the vertical axis, and (X1, Y1) and (X2, Y2) represent the beginning and end points of the exponential curve, respectively. In general, the coefficient R of the exponential function is set to a value of about 2.0, but can be set by the user so as to have an optimum reflection characteristic and a band characteristic.

For example, when the coefficient of the exponential term of the exponential function is changed as shown in FIG. 3, the openings 121a and 121b of the radiating part 120 and the openings 131a and 131b of the radiating part 130 are formed of the exponential function. Since the slope gradually increases or decreases according to the coefficient of the exponent term, the antenna 1 according to the embodiment of the present invention may have a wide band characteristic of 0.95 GHz to 2.8 GHz, and the user may adjust the coefficient of the exponent term. You can set the desired bandwidth.

As such, since the radiating parts 120 and 130 according to the exemplary embodiment of the present invention are positioned in opposite directions with respect to the open pattern 111 to form opposite beam patterns to transmit and receive signals, the antenna 1 has a bidirectional beam. Diversity can be secured.

4 is a diagram schematically illustrating a power supply layer of the antenna illustrated in FIG. 1. 5 is a view schematically showing an example in which the radiation layer and the power supply layer shown in FIGS. 2 and 4 are bonded.

As shown in FIG. 4, the feed layer 300 includes feed patterns 310 and 320 and short-circuit patterns 330 and 340.

The feed patterns 310 and 320 are formed of a conductor using a microstrip feeder, and are symmetrically formed in the X-axis direction about the open pattern 111 of the emission layer 100. Specifically, referring to FIG. 5, the feed pattern 310 is formed to be perpendicular to the transfer pattern 112 of the converter 110 to transfer power, and the feed pattern 320 is a transfer pattern of the converter 110. It is formed to be perpendicular to the 113 to transfer power. The point P1 at which the feed pattern 310 is joined to the transfer pattern 112 of the converter 110 and the point P2 at which the feed pattern 320 is joined to the transfer pattern 113 are defined by the conversion unit 110. The impedance generated in the open pattern 111 is set to a position where the impedance is maximized. That is, while moving the position where the transfer pattern 112 and the power feeding pattern 310 of the converter 110 are joined, the position where the impedance of the open pattern 111 is maximized is found and set as the P1 point, and the converter 110 is located. The position where the impedance of the open pattern 111 is maximized while moving the position where the transfer pattern 113 and the power feeding pattern 320 are bonded to each other is set to the P2 point.

Referring back to FIG. 4, the short circuit patterns 330 and 340 are connected to the respective feed patterns 310 and 310, and are symmetrical with respect to the Y axis, and are formed as conductors in a fan shape having a quarter wavelength. It is. The center angle f of the short circuit pattern 330 is connected to the power feeding pattern 310, and the center angle h of the short circuit pattern 340 is connected to the power feeding pattern 320. In detail, referring to FIG. 5, the impedance viewed from the short-circuit pattern 330 at the point P1 at which the transfer pattern 112 of the converter 110 and the feed pattern 310 of the feed layer 300 are joined is In order to be zero, the shorting pattern 330 of the power feeding layer 300 is shorted. Then, the power delivered from the power feeding pattern 310 is delivered to the radiator 120 without loss. Similarly, at the point P2 where the transfer pattern 113 of the converter 110 and the feed pattern 320 of the feed layer 300 are joined, the impedance viewed from the short circuit pattern 340 may be zero. The short circuit pattern 340 of the power supply layer 300 is short circuited. Then, the power delivered from the power feeding pattern 320 is transferred to the radiation portion 130 of the radiation layer 100 without loss. That is, the impedance formed in the radiator 120 and the input impedance of the power feeding pattern 310 are set to be the same in order to transfer power transmitted from the power feeding pattern 310 without loss, and the power transferred from the power feeding pattern 320. The impedance formed in the radiator 130 and the input impedance of the power feeding pattern 320 are set to be the same so as to transmit the loss without loss.

As described above, the antenna 1 for the bidirectional beam diversity according to the embodiment of the present invention has the left and right symmetry around the open pattern 111 to form the radiators 120 and 130 using the bow tie pattern in both directions. As the transfer patterns 112 and 113 that transmit power to the corresponding radiators 120 and 130 are formed in a meander shape, bidirectional beam diversity may be implemented to be applicable to a multiband antenna (MIMO). Can be. In addition, since the transfer patterns 112 and 113 are formed in a miniaturized flat plate structure having a meander shape, the transfer patterns 112 and 113 may be sufficiently embedded in a terminal having a limited volume.

The embodiments of the present invention described above are not implemented only through the apparatus and the method, but may be implemented through a program for realizing a function corresponding to the configuration of the embodiment of the present invention or a recording medium on which the program is recorded. Implementation may be easily implemented by those skilled in the art from the description of the above-described embodiments.

Although the embodiments of the present invention have been described in detail above, the scope of the present invention is not limited thereto, and various modifications and improvements of those skilled in the art using the basic concepts of the present invention defined in the following claims are also provided. It belongs to the scope of rights.

1 is a diagram schematically illustrating an antenna for bidirectional beam diversity according to an embodiment of the present invention.

FIG. 2 is a diagram schematically illustrating an emission layer of the antenna illustrated in FIG. 1.

FIG. 3 is a diagram illustrating frequency band characteristics according to a change of an exponential function in the radiating part of the radiating layer illustrated in FIG. 2.

4 is a diagram schematically illustrating a power supply layer of the antenna illustrated in FIG. 1.

5 is a view schematically showing an example in which the radiation layer and the power supply layer shown in FIGS. 2 and 4 are bonded.

Claims (18)

A transmission pattern formed in a meander shape symmetrically about the opening pattern and connected to the opening pattern, and a radiation pattern connected to the transmission pattern to receive power from the transmission pattern and formed in a bow tie shape; A radiation layer for forming a bidirectional beam by adjusting the slope of the radiation pattern, A feed layer supplying power to the transfer pattern through a feed pattern vertically bonded to the transfer pattern, and A dielectric layer positioned between the radiation layer and the feed layer and transferring power supplied from the feed layer to the radiation layer Antenna comprising a. The method of claim 1, The emission layer, A conversion unit including a first transmission pattern formed at a left side with respect to the open pattern, a second transmission pattern formed at a right side with respect to the open pattern and symmetrical with the open pattern; A first radiation pattern including a first radiation pattern having one end connected to the first transfer pattern, the first radiation portion being formed on the left side of the opening pattern; A second radiation pattern including a second radiation pattern having one end connected to the second transfer pattern, the second radiation portion being symmetrical with the first radiation portion and formed on the right side of the opening pattern; Antenna further comprising a. 3. The method of claim 2, Each of the first radiation pattern and the second radiation pattern includes a first opening and a second opening, And the slope of the first opening and the second opening is determined by an exponential function. The method of claim 3, The first opening and the second opening, And gradually decrease with a first slope determined by the exponential function or gradually decrease with a second slope symmetrical with the first slope. 5. The method of claim 4, The feed layer, A first feeding pattern formed on the left side of the opening pattern and vertically bonded at the first point with the first transfer pattern, A second feed pattern formed on the right side of the opening pattern and vertically bonded at the second point with the second transfer pattern; A first short circuit pattern having one end connected to the first feed pattern and having a predetermined center angle; and One end is connected to the second feed pattern and includes a second short circuit pattern having a predetermined center angle, And the first feed pattern and the second feed pattern are symmetrically formed around the open pattern, and the first short circuit pattern and the second short pattern are symmetrically formed. The method of claim 5, The opening pattern, the first transmission pattern, the second transmission pattern, the first radiation pattern, and the second radiation pattern of the radiation layer are formed as open slots, And the first feeding pattern, the second feeding pattern, the first shorting pattern and the second shorting pattern of the feeding layer are formed of a conductor. An opening pattern, a first transmission pattern having one end connected to the opening pattern and formed at a left side with respect to the opening pattern, a first radiation pattern having one end connected to the first transmission pattern and formed in a bow tie shape, and the opening pattern An emission layer including a second transmission pattern having one end connected to the second transmission pattern and a second transmission pattern formed at a right side with respect to the opening pattern, and having a second connection pattern connected to the second transmission pattern and having a bow tie shape; A first feed pattern formed at a left side with respect to the open pattern and bonded at the first point with the first transfer pattern, and a first feed pattern formed at the right with respect to the open pattern and bonded at the second point with the second transfer pattern; A feed layer including a feed pattern, and A dielectric layer formed between the radiation layer and the feed layer and transferring power supplied from the feed layer to the radiation layer Antenna comprising a. The method of claim 7, wherein And the first transmission pattern and the second transmission pattern are formed in a meander shape. The method of claim 8, The first feed pattern is vertically bonded to the first transfer pattern and the first point, And the second feed pattern is vertically bonded to the second transfer pattern at the second point. 10. The method of claim 9, The emission layer, And the first transmission pattern and the second transmission pattern are symmetrically formed around the open pattern, and the first radiation pattern and the second radiation pattern are symmetrically formed. The method of claim 10, Each of the first radiation pattern and the second radiation pattern includes a first opening and a second opening, And the slope of the first opening and the second opening is determined by an exponential function. The method of claim 11, The first opening and the second opening, And gradually decrease with a first slope determined by the exponential function or gradually decrease with a second slope symmetrical with the first slope. 10. The method of claim 9, The feed layer, A first short circuit pattern having one end connected to the first feed pattern and having a predetermined center angle; and And a second shorting pattern having one end connected to the second feeding pattern and having a predetermined center angle. The method of claim 13, The feed layer, And the first feed pattern and the second feed pattern are symmetrically formed around the open pattern, and the first short circuit pattern and the second short pattern are symmetrically formed. The method according to claim 10 or 13, The opening pattern, the first transmission pattern, the second transmission pattern, the first radiation pattern, and the second radiation pattern of the radiation layer are formed as open slots, And the first feeding pattern, the second feeding pattern, the first shorting pattern and the second shorting pattern of the feed layer are formed of a conductor. An open pattern, a first transmission pattern having one end connected to the opening pattern and being formed on the left side around the opening pattern, and a first radiation pattern having one end connected to the first transmission pattern and formed in a bow tie shape And a second transmission pattern having a meander shape formed at a right side with respect to the opening pattern and having a one end connected to the opening pattern and a second radiation pattern having one end connected to the second transmission pattern and formed in a bow tie shape. Radiant layer, A first feed pattern formed on the left side of the opening pattern and vertically bonded at the first point with the first transfer pattern, a first short circuit pattern having one end connected to the first feed pattern and having a predetermined center angle; A second feeding pattern formed on the right side of the opening pattern and vertically bonded to the second transfer pattern at a second point; and a second shorting pattern having one end connected to the second feeding pattern and having a predetermined center angle; Feed layer, and A dielectric layer formed between the radiation layer and the feed layer and transferring power supplied from the feed layer to the radiation layer Antenna comprising a. The method of claim 16, Each of the first radiation pattern and the second radiation pattern includes a first opening and a second opening, And the slope of the first opening and the second opening is determined by an exponential function. The method of claim 17, The opening pattern, the first transmission pattern, the second transmission pattern, the first radiation pattern, and the second radiation pattern of the radiation layer are formed as open slots, And the first feeding pattern, the second feeding pattern, the first shorting pattern and the second shorting pattern of the feeding layer are formed of a conductor.

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