KR102373096B1 - Broadband Bowtie Dipole Antenna Structure - Google Patents

Abstract

The present invention relates to a broadband bowtie dipole antenna structure, which has a cross shape with an integrated balloon PCB. The broadband bowtie dipole antenna structure of the present invention includes: a first PCB having a through-hole formed from a central position to an upper side and having a bowtie-type radiation part extending from the central position toward upper and lower portions; a second PCB having a through-hole formed from the central position to a lower side and having a bowtie-type radiation part extending from the central position toward upper and lower portions; and a balloon PCB configured to cross-couple the both PCBs at 90° using the through-holes of the first and second PCBs, electrically connect the radiation parts of the both PCBs by soldering around the through-holes where the first and second PCBs are coupled, and physically connected to some areas other than the radiation part of the second PCB, wherein the balloon PCB has a balloon transformer mounted at a center, and has a terminal part in which one end of the balloon transformer is connected to an end launch connector and the other side of the balloon transformer is electrically connected to the bowtie-type radiation part. The present invention can achieve miniaturization of a broadband dipole antenna.

Description

Broadband Bowtie Dipole Antenna Structure

The present invention relates to a broadband bowtie dipole antenna structure, and to a cross-shaped broadband bowtie dipole antenna structure in which a balun PCB is integrally formed.

The content described in this section merely provides background information for the present embodiment and does not constitute the prior art.

A general dipole antenna used for a direction finding antenna is made in a form in which a dipole radiating element and a balun are separately manufactured, and the radiating element and the balun are connected using a power supply line. In the case of designing the dipole antenna in this way, since a separate mechanical device such as a balun box for fixing the balun is required, there is a problem in that the overall height of the antenna increases and manufacturing cost increases.

10 shows a structure of a conventional dipole antenna. A conventional dipole antenna is configured such that a feed line is connected to one end or the center, and two dipoles intersect 90 degrees with respect to a feed point in the center of the radiation patch. And it has a structure that is coupled to the slot in the central part of the radiation patch as a balun for power feeding, and an SMA connector is connected to the lower part of the balun.

That is, since the conventional dipole antenna structure has a multi-layer structure connecting the balun and the connector to the lower end of the antenna radiating element, there is a problem in that the overall height of the antenna is increased. In addition, mechanical components for installing the balun are required, which increases the manufacturing cost.

Accordingly, it is an object of the present invention to provide a broadband bowtie dipole antenna structure in which a balun PCB is integrally configured.

Another object of the present invention is to provide a broadband bow tie dipole antenna structure in which a balun PCB capable of achieving miniaturization of a broadband dipole antenna applied to a direction finding antenna is integrally configured.

Another object of the present invention is to provide an antenna device that can be used for direction detection using a plurality of cross-shaped broadband bow tie dipole antennas integrally formed with a balun PCB.

In order to solve the above technical problems, the broadband bowtie dipole antenna structure according to an embodiment of the present invention forms a through-hole from the central position toward the upper side, and a bowtie-type radiating unit that spreads upward and downward from the central position. having a first PCB; a second PCB having a bow-tie-type radiating portion that forms a through-hole from the central position to the lower side and extends toward the upper and lower portions from the central position; Cross-linking both PCBs at a 90 degree angle using the through-holes of the first and second PCBs, and electrically connecting the radiating parts of both PCBs by soldering around the through-holes where the first and second PCBs are combined,

The balun PCB is physically connected to a partial area other than the radiating part of the second PCB, but

The balun PCB is characterized in that a balun transformer is mounted in the center, a terminal part for connecting an end launch connector to one side of the balun transformer is configured, and the other side of the balun transformer is electrically connected to a bow tie-type radiation part.

Preferably, the through hole of the first PCB is at a central position in the horizontal direction, and is formed to have a length of 57 mm and a width of 1.7 mm from the top to the bottom.

Preferably, the first PCB is characterized in that it is composed of a thickness of 1.7mm.

Preferably, the radiating part of the first and second PCBs is characterized in that it is formed by a metal silk printing technique.

Preferably, the first PCB has a horizontal length of 66 mm and a vertical length of 82 mm, and the bow tie-type radiation portion of the first PCB has a horizontal length of 56 mm and a vertical length of 38.5 mm, and the radiation portion is not formed in the central portion of the first PCB (L8) Including, the length of the region (L8) is characterized in that it consists of 5mm.

Preferably, the region L8 of the first PCB is an insulating region.

Preferably, the through hole of the second PCB is at a central position in the horizontal direction, and is formed to have a length of 25 mm and a width of 1.8 mm from the bottom to the top.

Preferably, the second PCB is characterized in that it is configured to have a thickness of 1.5 mm.

Preferably, the second PCB has a horizontal length of 66 mm and a vertical length of 82 mm, and the bow tie-type radiation portion of the second PCB has a horizontal length of 56 mm and a vertical length of 38.5 mm, and the radiation portion is not formed in the central portion of the second PCB (L8) Including, the length of the region (L8) is characterized in that it consists of 5mm.

Preferably, it is characterized in that the balun PCB is screwed to the area outside the radiating part of the second PCB.

Preferably, the balun PCB mounts the balun transformer in a central position, configures first and second terminal portions for connecting the entry launch connector through a signal line on one side of the balun transformer, and two signal lines on the other side of the balun transformer It is characterized in that it includes third and fourth terminals connected to both sides of the bow tie-type radiating part through the .

Preferably, the balun PCB is characterized in that the ground is configured at a position where the balun transformer is mounted.

Preferably, the balun PCB is characterized in that one unbalanced feed line is converted into impedance conversion and two balanced feed lines through a balun transformer to feed the upper and lower radiating parts.

Preferably, it is characterized in that the power is fed to the radiating part formed up and down in a central feeding method using a balun transformer.

Preferably, in the balun PCB, the longitudinal length from one end of the first and second terminals to one end of the third and fourth terminals is 32.2 mm, the longitudinal length is 15 mm, and the interval between the first terminal and the second terminal is 5 mm. , the interval between the third terminal part and the fourth terminal part is characterized in that it consists of 5mm.

An antenna device according to an embodiment of the present invention for achieving the above object is an antenna device in which a plurality of dipole antenna elements are arranged in a circular array,

Each of the dipole antenna elements, the first PCB having a bow-tie-type radiating portion that forms a through-hole from the supine position toward the upper side, and spreads upward and downward from the central position; a second PCB having a bow-tie-type radiating portion that forms a through-hole from the central position to the lower side and extends toward the upper and lower portions from the central position; Cross-linking both PCBs at a 90 degree angle using the through-holes of the first and second PCBs, and electrically connecting the radiating parts of both PCBs by soldering around the through-holes where the first and second PCBs are combined,

The balun PCB is physically connected to a partial area other than the radiating part of the second PCB, but

The balun PCB is configured to mount the balun transformer in the center, configure a terminal unit for connecting the end launch connector to one side of the balun transformer, and the other side of the balun transformer to be electrically connected to a bow tie-type radiating unit,

In the antenna device, a plurality of dipole antenna elements are arranged in a circular arrangement around the support member, and each dipole antenna is screwed to an arm formed integrally with the support member, but screws are used in the area outside the radiating part of the second PCB to physically combine, and the signal supplied through the signal line installed in the arm is directly transmitted to the balun PCB through the end launch connector.

The cross-type broadband bowtie dipole antenna structure in which the balun PCB is integrally configured according to the present invention includes a balun PCB integrally formed with the dipole antenna radiating element. That is, in the structure of the dipole antenna of the present invention, the structure of the dipole antenna is completed only by the physical configuration of the antenna radiating element shown in FIG. 1A. As described above, the present invention can achieve miniaturization of a broadband dipole antenna, and is very suitable for application to a direction finding antenna that is used by connecting a plurality of antenna elements.

1A and 1B are perspective views of a cross-shaped broadband bow tie dipole antenna structure (hereinafter referred to as a “dipole antenna structure”) in which a balun PCB is integrally configured according to an embodiment of the present invention.
2 shows a structure of a dipole antenna in an original arrangement according to an embodiment of the present invention.
3A and 3B show a specific embodiment of the first PCB according to the dipole antenna structure of the present invention.
4 shows a specific embodiment of the second PCB according to the dipole antenna structure of the present invention.
5 shows a specific embodiment of a balun PCB 100 according to an embodiment of the present invention.
6 illustrates a final antenna shape in which the first PCB and the second PCB formed according to a specific embodiment of the present invention are combined, and the balun PCB is combined with the second PCB.
7 is a voltage standing wave ratio characteristic diagram of an antenna according to an embodiment of the present invention.
8 is a gain characteristic diagram of an antenna according to an embodiment of the present invention confirmed by simulation.
9 is a radiation pattern characteristic diagram of an antenna according to an embodiment of the present invention confirmed by simulation.
10 shows a structure of a conventional dipole antenna.

Hereinafter, the embodiments disclosed in the present specification will be described in detail with reference to the accompanying drawings, but the same or similar components are assigned the same reference numbers regardless of reference numerals, and redundant description thereof will be omitted. The suffixes "part" and "group", "module" and "part", "unit" and "part", "device" and "system", "terminal" and "node" for components used in the description below. and "digital walkie-talkie" are given or mixed in consideration of only the ease of writing the specification, and do not have distinct meanings or roles by themselves.

In addition, in describing the embodiments disclosed in the present specification, if it is determined that detailed descriptions of related known technologies may obscure the gist of the embodiments disclosed in this specification, the detailed description thereof will be omitted. In addition, the accompanying drawings are only for easy understanding of the embodiments disclosed in this specification, and the technical idea disclosed herein is not limited by the accompanying drawings, and all changes included in the spirit and scope of the present invention , should be understood to include equivalents or substitutes.

Terms including an ordinal number such as 1st, 2nd, etc. may be used to describe various elements, but the elements are not limited by the terms. The above terms are used only for the purpose of distinguishing one component from another.

When a component is referred to as being “connected” or “connected” to another component, it may be directly connected or connected to the other component, but it is understood that other components may exist in between. it should be On the other hand, when it is said that a certain element is "directly connected" or "directly connected" to another element, it should be understood that the other element does not exist in the middle.

The singular expression includes the plural expression unless the context clearly dictates otherwise.

In the present application, terms such as “comprises” or “have” are intended to designate that a feature, number, step, operation, component, part, or combination thereof described in the specification exists, but one or more other features It should be understood that this does not preclude the existence or addition of numbers, steps, operations, components, parts, or combinations thereof.

Hereinafter, an embodiment of the present invention will be described in detail with reference to the drawings. It is apparent to those skilled in the art that the present invention may be embodied in other specific forms without departing from the spirit and essential characteristics of the present invention.

1A and 1B are perspective views of a cross-shaped broadband bowtie dipole antenna structure (hereinafter referred to as a “dipole antenna structure”) in which a balun PCB is integrally configured according to an embodiment of the present invention.

The dipole antenna structure according to an embodiment of the present invention is configured by cross-linking two PCBs 10 and 60 to have an interval of 90 degrees. The first PCB 10 includes a first radiating part 30 extended upward from the central position, and a second radiating part 40 extending downward from the central position. The first radiating part 30 and the second radiating part 40 are each configured in a triangular shape, and are configured in a bow tie shape in which the vertices of both triangles face each other. The first and second radiating units 30 and 40 are composed of conductors that radiate radiated signals into free space. In addition, the regions 45 outside the first and second radiating parts of the first PCB 10 maintain the state of the PCB composed of an insulator as it is.

The second PCB 60 includes a third radiating part 70 extended upward from the central position, and a fourth radiating part 80 extending downward from the central position. The third radiating part 70 and the fourth radiating part 80 are each configured in a triangular shape, and are configured in a bow tie shape in which the vertices of both triangles face each other. The third radiating unit 70 and the fourth radiating unit 80 are composed of conductors that radiate radiation signals into free space, and the regions 83 and 85 outside the third and fourth radiating units of the second PCB 60 are insulators. It maintains the state of the PCB composed of

The first and second radiating units 30 and 40 and the third and fourth radiating units 70 and 80 configured in the first PCB 10 and the second PCB 60 are made of the same size and the same material.

The area 83 outside the radiation part of the second PCB 60 is divided into an upper area 83a and a lower area 83b, and a balun PCB coupling area 83c is formed between the upper area 83a and the lower area 83b. is composed The balun PCB 100 is physically coupled to the balun PCB coupling region 83c using screws or the like. The balun PCB coupling region 83c is configured in the central portion of the region 83 outside the radiating part so that the terminal of the balun PCB 100 coupled to the corresponding position is connected to the vertex of the radiating part of the PCB.

The balun PCB 100 is physically coupled to the coupling region 83c of the second PCB 60 using a screw. The balun PCB 100 is configured such that one side has an open state and the other side is connected to the vertex of the radiating part of the PCB. The terminal part is configured to be connected to the end launch connector on one open side of the balun PCB 100 , and the terminal part is configured to be connected to the vertex of the antenna radiating part on the other side of the balun PCB 100 .

The balun PCB 100 is configured to mount a balun transformer on the middle part of the balun PCB, one side of the balun transformer is configured to be electrically connected to a terminal connected to the end launch connector, and the other side is electrically connected to the vertex of the antenna radiation part. configured to be connected to To this end, one side of the balun PCB 100 has an open state, and the end launch connector is configured to be connected to the terminal part.

That is, the embodiment of the present invention completes the dipole antenna structure by mounting the balun PCB 100 integrally on the second PCB 60 . Therefore, the signal provided through the end launch connector is transmitted to the radiating units 30, 40, 70, 80 of the antenna after impedance conversion through the balun transformer, and through the radiating units 30, 40, 70, 80 of the antenna. The received signal is configured to be transmitted to the end launch connector after impedance conversion through the balun transformer.

That is, according to the embodiment of the present invention, the dipole antenna structure does not need to include a balun box for separately connecting a balun transformer as in the prior art. In an embodiment of the present invention, the balun PCB is integrally mounted on the dipole antenna to minimize the physical height and volume of the antenna. That is, a separate mechanical device for connecting the antenna matching circuit and the like to the antenna radiating element is unnecessary, and only the physical shape of the antenna shown in FIGS. 1A and 1B has a complete configuration of a single dipole antenna.

The dipole antenna according to an embodiment of the present invention is used for direction detection. In the direction finding antenna, the miniaturization of the antenna acts as a very important part along with the antenna weight reduction and structural stability.

However, in the conventional method, when manufacturing a dipole antenna, since an antenna radiating element, a balun, and a balun box are applied, the physical height of the antenna is increased and manufacturing cost is also increased.

In the present invention, as shown in FIG. 1A, the antenna has a crossed bow tie dipole antenna shape, and the balun PCB is integrally formed on the PCB constituting the antenna radiating element. That is, in the embodiment of the present invention, since a separate balun box is not required, the antenna structure is simplified, miniaturized, and the overall height of the antenna is also reduced.

In addition, the dipole antenna structure of the present invention does not require a separate physical space for connecting the balun PCB to the antenna radiating element. Since the balun PCB is physically connected to the second PCB on which the antenna radiating element is formed without affecting signal processing of the antenna, the effect of structural stability can also be obtained.

On the other hand, the dipole antenna structure according to the embodiment of the present invention can be used in connection with an external signal processing device (not shown) in a single structure. That is, when the radiated signal processed by the signal processing device is directly supplied to the balun PCB through the end launch connector, impedance matching is performed through the balun transformer and transmitted to the outside through the antenna radiating element.

On the other hand, when a dipole antenna is used for direction detection, a plurality of dipole antenna elements can be arranged in the form of a circle so that a signal can be detected in 360 directions.

As an embodiment, the structure of a dipole antenna in a circular arrangement is shown in FIG. 2 .

In the illustrated dipole antenna structure of a circular array, a plurality of dipole antennas 1 are arranged in a circular array form with the support member 200 as the center. And each dipole antenna 1 is screwed to the arm 210 formed integrally with the support member 200 .

In the present invention, the second PCB 60 was physically coupled to the arm 210 using screws at determined positions of the upper region 83a and the lower region 83b. Then, the signal line 220 connected to the signal processing device is installed in the arm 210 , and a signal supplied through the signal line 220 is directly transmitted to the balun PCB 100 through the end launch connector.

Although the illustrated dipole antenna structure of the circular arrangement consists of 7 elements, this is only an example, and the dipole antenna can be composed of several to thousands of elements based on the size of the support member 200 and the field and purpose used. Do.

In addition, in order to improve the detection performance in a specific direction, it may be configured in a form in which the dipole antenna element is concentrated in a specific direction. That is, by arranging the dipole antenna in a variety of arrays other than the original array, it can be used for direction detection.

3A and 3B show a specific embodiment of the first PCB according to the dipole antenna structure of the present invention. In the following embodiment, the structure of the antenna is specified so that impedance matching can be achieved in the relationship between the radiating element of the dipole antenna and the balun PCB having a cross shape.

As shown in FIG. 3A, the first PCB 10 has a through-hole 20 at a central position, and both sides are identically configured around the through-hole. The through hole 20 at the central position has a width of 1.7 mm, and the through hole 20 is formed on the upper side at the central position. That is, the through hole 20 is formed from the upper end to the lower side, and is formed from the lower end to a position of about 25 mm. That is, a through hole is not formed from the lower end to a position of about 25 mm, and the first PCB 10 is configured equally on both sides around the through hole 20 using one PCB board.

The first PCB 10 forms a first radiating portion 30 that spreads upward from the central position, and a second radiating portion 40 that extends downward from the central position. That is, the first radiating part 30 and the second radiating part 40 formed in the first PCB 10 have the shape of a bow tie-type radiating part, and the longitudinal center position (L8) of the first PCB 10 is about 5mm has a function of a connection part for connecting the balun PCB, and is composed of an insulating area where a radiating part is not formed.

The first PCB 10 has a horizontal total length (L1 + L2) of 66 mm (including through holes), a vertical total length (L5) of 82 mm, and a through hole 20 formed in the center in the horizontal direction has a width of 1.7 mm. It is formed from the top to about 57 mm. And the total horizontal length (L3 + L4) of the first radiation unit 30 and the second radiation unit 40 is 56 mm (including through holes), and the vertical lengths (L6, L7) are 38.5 mm, respectively, in the vertical direction The length L8 of the region where the radiation portion is not formed is about 5 mm. The first PCB 10 used a 1.7 mm thick PCB.

That is, the first radiation part 30 and the second radiation part 40 on which the metal material is printed in the first PCB 10 are configured in a bow tie type at the center position of the first PCB 10, and the first PCB (10) In order to connect the balun PCB 100 to the central position of the radiating part outside the region L8 was additionally configured. The region L8 outside the radiating part thus configured is formed to be 5 mm, and the region of 5 mm is formed as an insulating region. In the present invention, a general metal silk printing technique may be applied to the radiating part.

In addition, reference numeral 50 shown on both sides of the through hole 20 of the first PCB 10 indicates an area in which soldering is performed when combined with the second PCB. The soldering region 50 electrically connects the radiating portions of the first and second PCBs while coupling the first and second PCBs. Soldering is not done in the L8 area. This is to allow the first radiating unit 30 and the second radiating unit 40 to be separated from each other.

4 shows a specific embodiment of the second PCB according to the dipole antenna structure of the present invention.

The horizontal length (L1+L2), the vertical length (L5) of the second PCB (60), the horizontal length (L3+L4) and the vertical length (L6, L7) of the radiating part, and the radiating part for connecting the balun PCB to the central position The outer region L8 and the like are configured in the same manner as the PCB 10 th.

That is, as shown in FIG. 4 , the second PCB 60 forms a third radiating part 70 extending upward from the central position, and a fourth radiating part 80 extending downward from the central position. . The third radiation part 70 and the fourth radiation part 80 formed on the second PCB 60 have the shape of a bow tie radiation part.

In addition, the second PCB 60 has a through hole 53 formed at a central position in the horizontal direction (L1+L2). The through hole 53 is formed from the central position to the lower side. That is, the through hole 53 is configured to have a length of about 25 mm and a width of 1.8 mm from the bottom to the top. Accordingly, the first PCB 10 forms a through hole 20 on the upper side, and the second PCB 60 forms a through hole 53 on the lower side, so that both PCBs use the through holes 20 and 53 to It is configured to be orthogonally coupled.

The second PCB 60 has a horizontal total length (L1+L2) of 66 mm (including through holes), and a vertical total length (L5) of 82 mm. And the total horizontal length (L3 + L4) of the third radiation unit 70 and the fourth radiation unit 80 is 56 mm (including through holes), and the vertical lengths (L6, L7) are 38.5 mm, respectively, in the vertical direction The length L8 of the region where the radiation portion is not formed is about 5 mm. And the second PCB (60) was configured to have a thickness of 1.5mm.

The balun PCB 100 is physically coupled to the second PCB 60 . To this end, a partial region of the second PCB 60 is designated as the balun PCB coupling region 83c, and the balun PCB 100 is coupled to the coupling region 83c.

Accordingly, the longitudinal length L9 corresponding to the upper region 83a and the longitudinal length L10 corresponding to the lower region 83b in the area 83 outside the radiating part of the second PCB 60 are each 33.5 mm. do.

In addition to this, the second PCB 60 is screwed to the arm 210 in the antenna structure of the original arrangement shown in FIG. 2 . At this time, the screwed position (indicated by four circles) is fixed to a specific position as shown in FIG. 4 .

That is, the third radiation part 70 and the fourth radiation part 80 on which the metal material is printed in the second PCB 60 are configured in a bow tie type at the center position of the second PCB 60 , and the second PCB 60 . In order to connect the balun PCB 100 to a partial region other than the radiating part of the , the coupling region 83c is set at a specific position.

And the reference numeral 55 shown on both sides of the center position of the second PCB (60) indicates an area in which soldering is made when combined with the first PCB. At this time, the soldering region 55 electrically connects the radiating parts of the first and second PCBs while coupling the first and second PCBs. Also in the second PCB 60, 5 mm between the first and second radiating parts 70 and 80 abut as vertices forms an insulating section, and no soldering is performed.

The first PCB 10 and the second PCB 60 configured in this way use the through hole 20 of the first PCB 10 and the through hole 53 of the second PCB 60 to form the first and second PCBs 10, 60) is inserted so as to intersect at an angle of 90 degrees, and the first PCB 10 and the second PCB 60 are cross-coupled to form a bowtie dipole antenna by soldering at the central positions 50 and 55 .

On the other hand, the broadband bowtie dipole antenna structure configured as described above requires the configuration of a balun PCB for impedance matching in the process of transmitting a signal to or receiving a signal from the radiating unit. In the embodiment of the present invention, the second PCB ( 60), the balun PCB 100 is physically connected to the specific coupling region 83c using screws, and the antenna radiating element and the balun PCB are integrally formed.

5 shows a specific embodiment of a balun PCB 100 according to an embodiment of the present invention.

The balun PCB 100 is made of a 0.6mm thick PCB and is made of a material different from the first and second PCBs constituting the antenna. The balun PCB uses the Rogers RO4350B series material, and the first and second PCBs use the Taconic RF-30 series material.

The balun PCB 100 is physically coupled to the coupling region 83c of the second PCB 60 using a screw. The positions of the screws (parts indicated by four circles) were defined as specific positions as shown in FIG. 5 .

In the balun PCB 100 , the portion coupled to the central position of the second PCB 60 has a width of 5 mm, and the portion coupled to the edge adjacent portion of the second PCB 60 has one side open, and has a width of 15 mm. is formed with And the balun PCB 100 is composed of a length of 32.2mm in the transverse direction.

The balun PCB 100 forms two terminal parts 110 for connecting the end launch connector to the open part. The terminal unit is connected to the balun transformer 150 through the signal pattern 140 . The balun transformer 150 is connected to the two signal patterns 130 , and the end of the signal pattern 130 includes two terminal units 120 coupled to the central portion of the second PCB 60 . At this time, one terminal part 120 is connected to the first and third radiation parts 30 and 70 of the first and second PCBs 10 and 60, and the other terminal part 120 is connected to the first and second PCBs 10 and 60. It is electrically connected to the second and fourth radiating parts 40 and 80 of the

The terminal part 120 of the balun PCB 100 has a length of 2 mm, and the terminal part 110 has a length of 5.2 mm. And, between the two terminal portions 110 of the balun PCB 100 is configured in an open state, and the end launch connector may be connected to the terminal portion 110 . At this time, as shown in FIG. 1 in the coupling area 83c of the second PCB 60 in order to configure the end launch connector to be connected, the corresponding part is cut to form an open state.

In the balun PCB 100 configured in this way, one unbalanced feed line 140 is converted into impedance and two balanced feed lines 130 through the balun transformer 150 , and through the two feed lines 130 ) Power is supplied to the radiating parts of the upper and lower parts of the dipole antenna, respectively.

And in the balun PCB shown on the right side of FIG. 5, four purple components shown in the center indicate the ground connected to the balun transformer.

6 illustrates a final antenna shape in which the first PCB and the second PCB formed according to a specific embodiment of the present invention are combined, and the balun PCB is combined with the second PCB.

In the dipole antenna structure shown in FIG. 6, the first and second PCBs are cross-inserted at an angle of 90 degrees using the first PCB through hole ① and the second PCB through hole ① to form a dipole antenna. At this time, the first and second PCBs constitute a bow tie-type radiating part② with an upper portion and a lower portion. Then, the balun PCB③ is screwed into the area outside the radiating part of the second PCB to form the antenna radiating part and the balun PCB as one body. At this time, connect the terminal part of the balun PCB to be connected to the antenna radiating part. And the balun PCB is configured so that the end launch connector④ for signal input/output is applied to one side, and the balun transformer⑤ can be mounted thereon.

The dipole antenna structure of the present invention configured as described above can secure wideband impedance matching characteristics by arranging bowtie elements in an orthogonal shape. In addition, by introducing a central feeding method using a balun transformer, co-pol (copolarization) and cross-pol (cross-polarization) separation characteristics are improved to improve direction detection performance.

That is, in the present invention, in configuring a bowtie-type dipole antenna structure that intersects at right angles, the horizontal length and vertical length of the first and second PCBs, the horizontal length and vertical length of the first, second, third, and fourth radiating units, and the The broadband impedance matching characteristics of the antenna can be obtained by optimizing the design of the balun PCB electrically connected to the master unit.

The dipole antenna structure according to the embodiment of the present invention configured as described above can be simplified and can be made miniaturized, and in addition, the effect of reducing the manufacturing cost of the antenna element can be obtained.

The dipole antenna structure according to the embodiment of the present invention configured as described above was simulated, and the result was obtained as follows. 7 is a voltage standing wave ratio characteristic diagram of an antenna according to an embodiment of the present invention. As shown, a voltage standing wave ratio of 3 or less was obtained in the frequency band of the antenna in the 1 to 2 GHz band, and a voltage standing wave ratio of 2 or less was obtained in the 2 to 5 GHz band.

8 is a gain characteristic diagram of an antenna according to an embodiment of the present invention confirmed by simulation. As shown, 0 ~ 2.5 dBi measurement results were obtained in the frequency band of 1 ~ 4.5 GHz of the antenna, and -4 ~ 0 dBi gain performance was obtained in 4.5 ~ 5 GHz. That is, it shows a stable gain distribution with no significant gain change in the 1 to 4.5 GHz band except for the 4.5 to 5 GHz band.

9 is a radiation pattern characteristic diagram of an antenna according to an embodiment of the present invention confirmed by simulation. As shown, the radiation pattern of the antenna maintained the omni-directional characteristic at 1 GHz and 3 GHz, and the radiation pattern was slightly distorted at 5 GHz, but it was confirmed that it had sufficiently excellent characteristics.

The above detailed description should not be construed as restrictive in all respects and should be considered as exemplary. The scope of the present invention should be determined by a reasonable interpretation of the appended claims, and all modifications within the equivalent scope of the present invention are included in the scope of the present invention.

10: 1st PCB, 20,53: through hole, 30,40,70,80: radiating part, 45,83,85: area outside the radiating part, 60: 2nd PCB, 83c: balun PCB coupling area, 100: balun PCB , 110,120: terminal part, 130,140: signal pattern, 150: balun transformer

Claims (16)

A first PCB having a bow-tie-type radiating portion that forms a through-hole from the central position to the upper side, and spreads toward the upper and lower portions from the central position;
a second PCB having a bow-tie-type radiating portion that forms a through-hole from the central position to the lower side and extends toward the upper and lower portions from the central position;
Cross-linking both PCBs at a 90 degree angle using the through-holes of the first and second PCBs, and electrically connecting the radiating parts of both PCBs by soldering around the through-holes where the first and second PCBs are combined,
The balun PCB is physically connected to a partial area other than the radiating part of the second PCB, but
The balun PCB is a broadband bow tie dipole antenna that mounts a balun transformer in the center, configures a terminal for connecting an end launch connector to one side of the balun transformer, and the other side of the balun transformer is electrically connected to a bow tie-type radiation unit structure. The method according to claim 1,
The through-hole of the first PCB is a central position in the horizontal direction, and a broadband bow tie dipole antenna structure is formed from the top to the bottom to have a length of 57 mm and a width of 1.7 mm. 3. The method according to claim 2,
The first PCB is a broadband bowtie dipole antenna structure with a thickness of 1.7mm. 4. The method according to claim 3,
The radiating part of the first and second PCBs is a broadband bow tie dipole antenna structure formed by a metal silk printing technique. 5. The method according to claim 4,
The first PCB is 66mm in width and 82mm in length,
The bow tie-type radiating part of the first PCB is composed of a horizontal length of 56 mm and a vertical length of 38.5 mm,
A broadband bowtie dipole antenna structure including a region L8 in which a radiating part is not formed in the center of the first PCB, and a length of the region L8 being 5 mm. 6. The method of claim 5,
The region L8 of the first PCB is an insulating region of a broadband bowtie dipole antenna structure. The method according to claim 1,
The through-hole of the second PCB is a central position in the horizontal direction, and the broadband bow tie dipole antenna structure is formed with a length of 25 mm and a width of 1.8 mm from the bottom to the top. 8. The method of claim 7,
The 2nd PCB is a broadband bowtie dipole antenna structure with a thickness of 1.5mm. 9. The method of claim 8,
The second PCB is 66mm in width and 82mm in length,
The bow tie-type radiating part of the 2nd PCB is composed of a horizontal length of 56 mm and a vertical length of 38.5 mm,
A broadband bowtie dipole antenna structure including a region L8 in which a radiating part is not formed in the center of the second PCB, and a length of the region L8 being 5 mm. 10. The method of claim 9,
A broadband bowtie dipole antenna structure in which the balun PCB is screwed into the area outside the radiating part of the second PCB. The method according to claim 1,
The balun PCB mounts the balun transformer in the central position, configures the first and second terminals for connecting the entry launch connector through the signal line on one side of the balun transformer, and the bow through two signal lines on the other side of the balun transformer A broadband bow tie dipole antenna structure including third and fourth terminals connected to both sides of the tie-type radiating part. 12. The method of claim 11,
The balun PCB is a broadband bowtie dipole antenna structure that constitutes the ground at the location where the balun transformer is mounted. 13. The method of claim 12,
The balun PCB is a broadband bow tie dipole antenna structure in which one unbalanced feed line is converted into impedance conversion and two balanced feed lines through a balun transformer to feed the radiating part formed up and down. 14. The method of claim 13,
A broadband bow tie dipole antenna structure that feeds power to the radiating part formed up and down by a central feeding method using a balun transformer. 15. The method of claim 14,
The balun PCB has a length of 32.2 mm and a length of 15 mm in the longitudinal direction from one end of the first and second terminals to one end of the third and fourth terminals,
A broadband bowtie dipole antenna structure in which the interval between the first terminal part and the second terminal part is 5 mm, and the distance between the third terminal part and the fourth terminal part is 5 mm. In the antenna device in which a plurality of dipole antenna elements are arranged in a circular array,
Each dipole antenna element is
a first PCB having a bow-tie-type radiating portion that forms a through-hole from the central position toward the upper side, and extends toward the upper and lower portions from the central position;
a second PCB having a bow-tie-type radiating portion that forms a through-hole from the central position to the lower side and extends toward the upper and lower portions from the central position;
Cross-linking both PCBs at a 90 degree angle using the through-holes of the first and second PCBs, and electrically connecting the radiating parts of both PCBs by soldering around the through-holes where the first and second PCBs are combined,
The balun PCB is physically connected to a partial area other than the radiating part of the second PCB, but
The balun PCB is configured to mount the balun transformer in the center, configure a terminal unit for connecting the end launch connector to one side of the balun transformer, and the other side of the balun transformer to be electrically connected to a bow tie-type radiating unit,
In the antenna device,
A plurality of dipole antenna elements are arranged in a circular arrangement around the support member,
Each dipole antenna is screwed to the arm formed integrally with the support member,
Physically coupled to the area outside the radiating part of the second PCB using screws,
Antenna device in which the signal supplied through the signal line installed in the arm is transmitted directly to the balun PCB through the end launch connector.

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