KR102312000B1 - Dual-polarization choke type antenna for measuring ota - Google Patents

Abstract

The present invention relates to a dual-polarization choke type antenna for measuring over-the-air (OTA) comprising: a beam radiating unit with one side open and the other side closed and having an opened cross section increasing in a concentric circle; a dual-polarized wave receiving unit formed inside the beam radiating unit, a connector unit formed outside the beam radiating unit and coupled to the dual-polarized wave receiving unit; and an angle setting unit fixing a position of the beam radiating unit and setting a radiation angle. Therefore, when measuring with 5G new radio (NR) OTA, the present invention expands an antenna beam radiation pattern and enables dual polarization measurement, thereby reducing measurement time and installation errors and increasing accuracy.

Description

DUAL-POLARIZATION CHOKE TYPE ANTENNA FOR MEASURING OTA

The present invention relates to an over-the-air (OTA) measurement antenna for 5G base station transmission power and performance inspection, and more particularly, a double-polarized choke-type OTA measurement antenna with a wide beam radiation pattern and capable of simultaneously measuring double-polarized waves is about

5G NR (New Radio), the next-generation mobile communication standard of 3GPP, supports gigabit connection speed, reduced latency, improved stability, increased connection density, and improved energy efficiency compared to LTE. 5G NR also uses massive MIMO and beamforming techniques that rely on large antenna arrays to avoid higher attenuation effects at high frequencies.

On the other hand, performance tests for 5G NR base stations require over-the-air (OTA) measurements because there is no RF contact to connect the test equipment via cables. When measuring with 5G NR OTA, accurate transmission power can be measured only when it is measured within the transmission antenna beam. Because the 5G NR base station uses more beams than the existing LTE method for the signal radiated through the transmit antenna, after measuring the Equivalent Isotropic Radiated Power (EIRP) at the measurement location, the measurement result value is measured as Total Radiated Power (TRP). Check it. When performing reliability tests on 5G NR base stations with OTA, horn antennas are usually used, and after installing the antennas of the base station at a right angle at the measurement location, the free space loss is compensated to perform performance tests such as base station power and unnecessary launch. do.

When a horn antenna having a high reception gain is used, the Half Power Bandwidth (HPBW) of the beam radiation pattern has a sharp shape of beam specification. This method can increase the reception sensitivity, but it is sensitive to the measurement angle, so the accuracy can be reduced. problems may arise.

Korean Patent Application Laid-Open No. 10-2019-0087885 relates to a horn antenna, which includes a waveguide through which radio waves are transmitted and a parabolic reflective surface that transforms a spherical wave into a plane wave. start the technique.

Korean Patent Publication No. 10-1992605 relates to a horn antenna that can be used in various frequency bands. It is connected to a waveguide that has a different size depending on the range of the frequency band and is made by combining four plates to have a rectangular cross section. It includes a horn having a shape whose cross section is gradually widened in an open direction, and a power supply part attached to the outside of one surface of the waveguide for transmitting and receiving signals, and concave-convex coupling parts are formed on both edges of the plate to combine adjacent to each other Disclosed is a technology capable of reducing the size and weight of an antenna while maintaining or improving the performance of the antenna while maintaining or improving the performance of the antenna by inserting the irregularities between the parts, so that the structure is simple and easy to manufacture.

Korean Patent Publication No. 10-2019-0087885 (2019.07.25) Korean Patent Publication No. 10-1992605 (June 19, 2019)

An embodiment of the present invention is to provide a double-polarized choke-type OTA measurement antenna capable of simultaneously measuring a double-polarized wave having a wide beam radiation pattern.

One embodiment of the present invention is a double-polarized wave choke-type OTA that can ensure accuracy in measurement by improving the degree of change in measurement values according to measurement angle errors by widening the beam radiation pattern by having one side open and the opening surface formed in a concentric circle We would like to provide an antenna for measurement.

An embodiment of the present invention is to provide a dual-polarized choke-type OTA measurement antenna that can easily measure a double-polarized signal without reinstalling the antenna by including a double-polarized wave receiving unit therein.

Among the embodiments, the double-polarized wave choke-type OTA measurement antenna has a tubular shape with one side open and the other side closed, and a beam emitter with an opening cross-section increasing in a concentric circle, a double-polarized wave receiver formed inside the beam radiation section , It is formed on the outside of the beam radiating unit and includes a connector unit coupled to the polarized wave receiving unit, and an angle setting unit for fixing the position of the beam radiating unit and setting the radiation angle.

The beam radiating unit may include a tube portion formed in a cylindrical shape of a predetermined length and an enlargement portion that gradually enlarges the cross-sectional area from the tip of the tube portion.

The double-polarized wave receiving unit is spaced apart from the inner wall of the tube part by a predetermined distance, is disposed at a right angle on the same line, and may include a first polarized wave receiving member and a second polarized wave receiving member for receiving a horizontal wave and a vertical wave of the receiving beam, respectively. .

The connector part is spaced apart from the outer wall of the pipe part by a predetermined distance and is disposed at a right angle on the same line, and outputs a first polarized signal and a second polarized signal among the double polarized signals received from the double polarized wave receiver through the connected cables. It may include a first connector and a second connector.

The angle setting unit may include a plurality of angle setting holes penetrating the tube portion, and the position of the beam radiating unit may be fixed through one of the plurality of angle setting holes.

The plurality of angle setting holes may include a first angle setting hole and a second angle setting hole that are spaced apart from each other by a predetermined distance and form 45° on the same line at the lower part of the pipe part.

When the plurality of angle setting holes are fixed at the position of the beam emission unit through the first angle setting hole, ±45° measurement angle is set for the double polarized wave receiving unit, and the position of the beam emission unit through the second angle setting hole When fixed, 0˚ and 90˚ measurement angles may be set for the bipolarized wave receiver.

A first flat surface and a second flat surface are formed on one side of the tube in the longitudinal direction on the outer wall, and a third flat surface is formed opposite to the opposite side between the first flat surface and the second flat surface, and the second flat surface is formed on an opposite side between the first flat surface and the second flat surface A fourth flat surface may be formed to face the opposite side of the surface, the connector part may be coupled to each of the first flat surface and the second flat surface, and the angle setting part may be formed on each of the third flat surface and the fourth flat surface. .

The disclosed technology may have the following effects. However, this does not mean that a specific embodiment should include all of the following effects or only the following effects, so the scope of the disclosed technology should not be construed as being limited thereby.

The double-polarized wave choke-type OTA measurement antenna according to an embodiment of the present invention has a wide beam radiation pattern and can simultaneously measure bipolarized waves.

The double polarization choke type OTA measurement antenna according to an embodiment of the present invention has one side open and the aperture surface is formed in a concentric circle to widen the beam radiation pattern to improve the degree of change in the measurement value according to the measurement angle error, thereby improving the accuracy in measurement can be obtained

The double-polarized choke-type OTA measurement antenna according to an embodiment of the present invention includes a double-polarized wave receiving unit therein, so that the double-polarized signal can be easily measured without reinstalling the antenna.

1 is a perspective view showing a double-polarized choke type OTA measurement antenna according to the present invention.
2 is a bottom perspective view showing a double-polarized choke type OTA measurement antenna according to the present invention.
3 is a front view showing the double polarization choke type OTA measurement antenna according to the present invention.
4 is a rear view showing a dual polarization choke type OTA measurement antenna according to the present invention.
5 is a view for explaining the radiation angle setting of the double-polarized wave choke type OTA measurement antenna according to the present invention.
6A-6B are diagrams illustrating beam radiation patterns of an antenna for measuring a double-polarized wave choke type OTA according to an exemplary embodiment.
7 is a view showing a product photograph of a dual-polarization choke type OTA measurement antenna according to an embodiment.
8 is an exemplary diagram illustrating an installation state of an antenna for measuring a dual polarization choke type OTA according to an embodiment.

Since the description of the present invention is merely an embodiment for structural or functional description, the scope of the present invention should not be construed as being limited by the embodiment described in the text. That is, since the embodiment may have various changes and may have various forms, it should be understood that the scope of the present invention includes equivalents capable of realizing the technical idea. In addition, since the object or effect presented in the present invention does not mean that a specific embodiment should include all of them or only such effects, it should not be understood that the scope of the present invention is limited thereby.

On the other hand, the meaning of the terms described in the present application should be understood as follows.

Terms such as “first” and “second” are for distinguishing one component from another, and the scope of rights should not be limited by these terms. For example, a first component may be termed a second component, and similarly, a second component may also be termed a first component.

When a component is referred to as being “connected” to another component, it should be understood that the component may be directly connected to the other component, but other components may exist in between. On the other hand, when it is mentioned that a certain element is "directly connected" to another element, it should be understood that the other element does not exist in the middle. Meanwhile, other expressions describing the relationship between elements, that is, “between” and “between” or “neighboring to” and “directly adjacent to”, etc., should be interpreted similarly.

The singular expression is to be understood to include the plural expression unless the context clearly dictates otherwise, and terms such as "comprises" or "have" refer to the embodied feature, number, step, action, component, part or these It is intended to indicate that a combination exists, and it should be understood that it does not preclude the possibility of the existence or addition of one or more other features or numbers, steps, operations, components, parts, or combinations thereof.

Identifiers (eg, a, b, c, etc.) in each step are used for convenience of description, and the identification code does not describe the order of each step, and each step clearly indicates a specific order in context. Unless otherwise specified, it may occur in a different order from the specified order. That is, each step may occur in the same order as specified, may be performed substantially simultaneously, or may be performed in the reverse order.

All terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs, unless otherwise defined. Terms defined in general used in the dictionary should be interpreted as being consistent with the meaning in the context of the related art, and cannot be interpreted as having an ideal or excessively formal meaning unless explicitly defined in the present application.

1 is a perspective view showing a double-polarized choke-type OTA measurement antenna according to the present invention, FIG. 2 is a bottom perspective view showing a double-polarized choke-type OTA measurement antenna according to the present invention, and FIG. 3 is a double-polarized wave according to the present invention It is a front view showing a choke-type OTA measurement antenna, and FIG. 4 is a rear view showing a double-polarized wave choke-type OTA measurement antenna according to the present invention.

1 to 4, the double-polarized choke-type OTA measurement antenna 100 according to the present invention includes a beam radiating unit 110, a bi-polarized wave receiving unit 130, a connector unit 150, and an angle setting unit 170. ) is included.

The beam radiating unit 110 has a tubular shape with one side open and the other side closed, and the opening cross section is formed in a choke-shaped structure of concentric circles to broaden the radiation pattern of the reception beam. The beam radiating unit 110 may include a tube portion 111 of a certain length and an enlargement portion 113 that enlarges the cross-sectional area of the tip of the tube portion 111 . Here, the tube portion 111 is formed in a cylindrical shape, and a first flat surface 111a and a second flat surface 111b are formed on one side in the longitudinal direction along the outer circumferential surface, and a third flat surface 111c and a third flat surface 111c are formed on the other side in the longitudinal direction. A fourth flat surface 111d is formed. The first flat surface 111a and the second flat surface 111b are spaced apart from each other by a predetermined distance on the outer upper portion of the tube portion 111 and are formed at an angle of 90° to each other. The connector part 150 is coupled to the first flat surface 111a and the second flat surface 111b. The third flat surface 111c and the fourth flat surface 111d are spaced apart from each other by a predetermined distance on the lower outer side of the tube portion 111 and are formed at an angle of 45° to each other. The third flat surface 111c is disposed opposite to the opposite side between the first flat surface 111a and the second flat surface 111b. The fourth flat surface 111d is disposed opposite to the second flat surface 111b. The enlarged portion 113 is formed in a structure that is gradually enlarged from the tip of the tube portion 111 . Here, the enlarged part 113 may be implemented in a step structure to have a concentric circular choke antenna shape when viewed from the front of FIG. 3 . As the size of the aperture increases, not only the beam width increases, but also the antenna gain increases.

The beam radiating unit 110 can enlarge the beam radiation pattern through the enlarged circular tube, and thus can widen the allowable error range of the measurement angle compared to the horn antenna that is sensitive to the measurement angle, so that the measurement value according to the measurement angle error By improving the degree of variation, it is possible to secure the accuracy of the measurement.

The double polarization receiving unit 130 is configured to include a first polarized wave receiving member 131 and a second polarized wave receiving member 133 inside the beam radiating unit 110 . The first polarized wave receiving member 131 and the second polarized wave receiving member 133 are spaced apart from the inner circumferential surface of the tube part 111 by a predetermined distance and arranged on the same line, and are coupled at a position of ±45° with respect to the installation center of the antenna 100 . do. The first polarization receiving member 131 is disposed at a position on the inner wall corresponding to the first flat surface 111a of the tube part 111 , and the second polarization receiving member 133 is the second flat surface 111b of the tube part 111 . ) is placed on the inner wall corresponding to the The first polarized wave receiving member 131 and the second polarized wave receiving member 133 receive horizontal and vertical signals of a reception beam, respectively.

The double polarization receiving unit 130 is a first polarized wave receiving member 131 and a second polarized receiving member 133 positioned at ± 45 ° in accordance with the azimuth angle of the transmission beam when performing a reliability check of the 5G NR base station by OTA. Since it is possible to receive a bipolarized signal, it is possible to easily measure without having to reinstall the antenna 100 by changing the measurement angle.

The connector part 150 is configured to include a first connector 151 and a second connector 153 on the outside of the beam radiating part 110 . The first connector 151 and the second connector 153 are spaced apart from the outer peripheral surface of the pipe part 111 by a predetermined distance and are arranged on the same line. The first connector 151 is disposed on the first flat surface 111a of the tube portion 111 and is coupled to the first polarization receiving member 131 . The second connector 153 is disposed on the second flat surface 111b of the tube portion 111 and is coupled to the second polarization receiving member 133 . The first connector 151 may be connected to a measuring device through a measuring cable and output the first polarized wave signal received by the first polarized wave receiving member 131 to the measuring device. The second connector 153 may be connected to a measuring device through a measuring cable and output the second polarized wave signal received by the second polarized wave receiving member 133 to the measuring device.

The angle setting unit 170 is configured to include a plurality of angle setting holes 171 and 173 capable of setting a radiation angle and fixing a position when the double-polarized wave choke type antenna 100 according to an embodiment is installed. The plurality of angle setting holes 171 and 173 may be formed to pass through the pipe part 111 of the beam radiating part 110 . Among the plurality of angle setting holes 171 and 173, the first angle setting hole 171 is formed on the third flat surface 111c of the pipe part 111, and ±45˚ with respect to the bipolarized wave receiver 130 when the position is fixed in the measuring device. You can set the measurement angle. The second angle setting hole 173 is formed on the fourth flat surface 111d of the tube part 111 and can set 0˚ and 90˚ measurement angles with respect to the bipolarized wave receiver 130 when the position is fixed to the measuring device.

5 is a view for explaining the radiation angle setting of the double-polarized wave choke type OTA measurement antenna according to the present invention.

Referring to FIG. 5 , in the double polarization choke type OTA measurement antenna 100 , the first contactor 151 and the second connector 153 are formed at a position of ±45° with respect to the first angle setting hole 171 . Based on the second angle setting hole 173 formed at a 45˚ position from the first angle setting hole 171, the first connector 151 is at a 90˚ position, and the second connector 153 is located at a 0˚ position. is formed The double polarization choke-type OTA measurement antenna 100 is equipped with a first angle setting hole 171 or a second angle setting hole 173 to automatically set the radiation angle as the installation position is fixed to minimize the error of the measurement angle. can Accordingly, the first polarized wave receiving member 131 and the second polarized wave receiving member 133 electrically connected to the first connector 151 and the second connector 153 receive a vertical wave and a horizontal wave with respect to the receiving beam. can do.

6A and 6B are views illustrating a beam radiation pattern of an antenna for measuring a bipolarized wave choke type OTA according to an embodiment. In FIG. 6A , the horizontal axis indicates an angle and the vertical axis indicates power.

Referring to FIGS. 6A and 6B , it can be seen that the beam width of the beam radiation pattern increases according to the shape of the beam radiation unit 110 in the double polarization choke type OTA measurement antenna 100 according to an embodiment.

7 is a view showing a product photograph of a dual-polarization choke-type OTA measurement antenna according to an embodiment, and FIG. 8 is an exemplary view showing an installation state of the dual-polarization choke-type OTA measurement antenna according to an embodiment.

7 and 8 , the double-polarized choke-type OTA measurement antenna 100 according to an embodiment may be fixedly installed on the plate 200 and connected to the measuring instrument 400 through the measurement cable 300 . The double polarization choke type OTA measurement antenna 100 according to an embodiment is fixed to the plate 200 when the antenna is installed without a protractor by fixing the position through a plurality of angle setting holes 171 and 173 of the angle setting unit 170 . You can easily set the rectangle. The double polarization choke type OTA measurement antenna 100 according to an embodiment connects the measurement cable 300 to each of the plurality of connectors 151 and 153 of the connector unit 150 when the measurement cable 300 is connected to the double polarization receiving unit The bipolarized signal received at 130 may be transmitted to the measuring instrument 400 . The double-polarized wave choke-type OTA measurement antenna 100 according to an embodiment can easily set a measurement angle and has a wide beam radiation pattern, thereby minimizing a measurement error due to a measurement angle error, thereby increasing measurement accuracy.

Although the above has been described with reference to preferred embodiments of the present invention, those skilled in the art can variously modify and change the present invention within the scope without departing from the spirit and scope of the present invention as set forth in the claims below. You will understand that it can be done.

100: double polarization choke type OTA measurement antenna
110: beam radiating unit
111: pipe part 111a, 111b, 111c, 111d: flat surface
113: enlarged part
130: bipolarized wave receiving unit
131: first polarized wave receiving member 133: second polarized wave receiving member
150: connector part
151: first connector 153: second connector
170: angle setting unit
171: first angle setting hole 173: second angle setting hole
200: plate 300: measuring cable
400: instrument

Claims (8)

a beam radiating unit having a tubular shape with one side open and the other side closed, and the opening cross-section increases in a concentric circle;
a bipolarized wave receiving unit formed inside the beam radiating unit;
a connector unit formed outside the beam emission unit and coupled to the multipolarized wave receiving unit; and
A double-polarized wave choke-type OTA measurement antenna comprising an angle setting unit for fixing the position of the beam emission unit and setting a radiation angle.
According to claim 1, wherein the beam radiating unit
A double-polarized choke-type OTA measurement antenna comprising a tube portion formed in a cylindrical shape of a certain length and an enlargement portion that gradually enlarges the cross-sectional area from the tip of the tube portion.
The method of claim 2, wherein the double-polarized wave receiving unit
A double polarized wave choke comprising a first polarized wave receiving member and a second polarized wave receiving member that are spaced apart from the inner wall of the pipe part by a predetermined distance and are disposed at right angles on the same line and receive a horizontal wave and a vertical wave of the receiving beam, respectively. Antenna for type OTA measurement.
The method of claim 2, wherein the connector part
A first connector for outputting a first polarized signal and a second polarized signal from among the double polarized signals received from the double polarized wave receiving unit through cables connected to each other and spaced apart from the outer wall of the pipe by a predetermined distance and disposed at right angles on the same line; A double-polarized choke-type OTA measurement antenna comprising a second connector.
According to claim 2, wherein the angle setting unit
A double polarization choke-type OTA measurement antenna comprising a plurality of angle setting holes penetrating the tube and fixing the position of the beam radiation unit through one of the plurality of angle setting holes.
The method of claim 5, wherein the plurality of angle setting holes are
A double polarization choke-type OTA measurement antenna comprising a first angle setting hole and a second angle setting hole that are spaced apart from the lower part of the tube at a predetermined distance and are arranged at 45° on the same line.
The method of claim 6, wherein the plurality of angle setting holes are
When the position of the beam radiation unit is fixed through the first angle setting hole, a ±45° measurement angle is set for the bipolarized wave receiving unit,
When the position of the beam radiation unit is fixed through the second angle setting hole, 0˚ and 90˚ measurement angles are set for the double polarized wave receiving unit.
3. The method of claim 2, wherein the pipe portion
A first flat surface and a second flat surface are formed on one side of the outer wall along the longitudinal direction, and a third flat surface is formed opposite to the opposite side between the first flat surface and the second flat surface, and the opposite side of the second flat surface A fourth flat surface is formed opposite to the connector portion is coupled to each of the first flat surface and the second flat surface, and the angle setting portion is formed on each of the third flat surface and the fourth flat surface Antenna for polarization choke type OTA measurement.

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