JP6099811B2 - Multiband antenna - Google Patents

Description

  The present invention relates to an antenna, and more particularly to a multiband antenna that exhibits good antenna performance in various bands including a mobile communication frequency band.

  With the popularization of personal mobile phones and the recent popularization of smartphones and tablet computers, the amount of radio waves used for telephone calls and the wireless Internet has increased rapidly. In addition, the demands of customers who want to use the telephone and the Internet anytime and anywhere, and the demands of customers for communication speed and call quality are increasing.

  In particular, customers can make appropriate calls not only outdoors, but indoors, such as buildings, even in shadowed areas where radio waves are not well transmitted by terrain features, such as far away from existing base stations and mobile communication repeaters. Requesting quality.

  In order to meet such customer requirements, each communication company additionally installs base stations and mobile communication repeaters in shaded areas. In addition, terminals used by customers have various frequency bands to be used. For example, terminals used by customers can support not only large base station-based mobile communication systems such as WAN, WIFI, and short-range wireless, but also various wireless communication systems, and the frequencies used in each communication system. Bands have different characteristics.

  On the other hand, in a situation where the terminal supports multitasking, the customer desires to use a variety of communication methods comprehensively, so facilities that can support the various communication methods described above are required. Yes. In order to meet such demands, facilities for supporting various communication methods are installed. However, since a space where an antenna or the like can be installed is limited, it is very difficult to secure the space.

  In addition, in order to support various communication methods, various antennas according to each communication method must be additionally installed, which results in a large cost.

  Accordingly, an object of the present invention is to provide a multiband antenna that exhibits good antenna performance in various bands including a mobile communication frequency band.

  Another object of the present invention is to provide a multi-band antenna in which a horizontal radiating element and a vertical radiating element are integrated to enable multiple input (Multiple Input Multiple Output; MIMO).

  Still another object of the present invention is to provide a multi-band antenna capable of improving the separation characteristics while installing feeding cables respectively connected to a horizontal radiating element and a vertical radiating element close to each other. .

  To achieve the above object, the present invention provides a multi-band antenna including an insulating base substrate, a horizontal radiating element, and a vertical radiating element. The base substrate has an upper surface and a lower surface. The horizontal radiating element is formed by patterning a metal plate on one side of the base substrate to form a horizontal polarization dipole. The vertical radiating element is disposed on the base substrate spaced apart from the horizontal radiating element, and is disposed so as to protrude on the base substrate to form a vertical polarization dipole.

  The multi-band antenna according to the present invention is connected to the horizontal radiating element through the lower surface of the base substrate and feeds power, and is fed to the vertical radiating element through the lower surface of the base substrate. And a vertical feeding cable.

  In the multiband antenna according to the present invention, the horizontal radiating element may include a first horizontal radiating pattern, a second horizontal radiating pattern, and a first feeding pattern. The first horizontal radiation pattern is formed on a lower surface of the base substrate. The second horizontal radiation pattern is formed on the upper surface of the base substrate so as to be separated from the first horizontal radiation pattern transferred from the lower surface to the upper surface of the base substrate. The first power feeding pattern is connected to the second horizontal radiation pattern and feeds power to the second horizontal radiation pattern through the horizontal power feeding cable.

  In the multiband antenna according to the present invention, the first feeding pattern may include a first core wire hole and a first feeding line. The first core wire hole is formed through the base substrate, and the first core wire of the horizontal power feeding cable is inserted and joined thereto. The first power supply line extends from the first core wire hole, is formed on an upper surface of the base substrate, and connects the first core wire hole and the second horizontal radiation pattern.

  In the multi-band antenna according to the present invention, the first core hole may be formed in an island shape in the vertical radiation pattern and spaced apart from the vertical radiation pattern.

  In the multi-band antenna according to the present invention, the first ground line of the horizontal feed cable may be joined to the first horizontal radiation pattern.

  In the multiband antenna according to the present invention, the vertical radiating element may include a vertical radiating pattern, a vertical radiating plate, and a second feed pattern. The vertical radiation pattern is formed by patterning a metal plate on the lower surface of the base substrate. The vertical radiation plate is installed on an upper surface of the base substrate above the vertical radiation pattern. The second feeding pattern is connected to the vertical radiation plate and feeds power to the vertical radiation plate through the vertical feeding cable.

  In the multiband antenna according to the present invention, the second feeding pattern may include a second core hole and a second feeding line. The second core wire hole is formed through the base substrate, and the second core wire of the vertical power supply cable is inserted and joined, separated from the vertical radiation pattern, and formed in an island shape in the vertical radiation pattern. Is done. The second power supply line extends from the second core wire hole and is formed on an upper surface of the base substrate, and connects the second core wire hole and the vertical radiation plate.

  In the multiband antenna according to the present invention, the second ground line of the vertical feed cable may be joined to the vertical radiation pattern.

  In the multiband antenna according to the present invention, the vertical radiation plate may be disposed at a central portion inside the vertical radiation pattern. The vertical radiation pattern may be formed in an elliptical shape so as to be symmetric with respect to the vertical radiation pattern.

  In the multi-band antenna according to the present invention, the vertical radiation plate includes a power supply base joined to the second power supply line, and a plurality of radiation plates installed in a radial shape around the power supply base on the power supply base. Can be included.

  In the multiband antenna according to the present invention, the plurality of radiation plates may be four, and adjacent radiation plates may be disposed such that an angle between the plates is 90 degrees.

  In the multiband antenna according to the present invention, each of the plurality of radiation plates includes an insulating radiation plate body, a radiation metal plate formed on both surfaces of the radiation plate body, and electrically connected to the feed base. Can be included.

  In the multiband antenna according to the present invention, at least one radiation plate of the plurality of radiation plates further includes an insulating support base extending from the radiation plate body to the base substrate and fixedly installed on the base substrate. be able to.

  In the multi-band antenna according to the present invention, the separation between the vertical radiating element and the horizontal radiating element may be formed on the base substrate to have 20 to 30 dB.

  The present invention also provides a multiband antenna including an insulating base substrate, a horizontal radiating element, a vertical radiating element, a horizontal feed cable, a vertical feed cable, and a housing. The base substrate has an upper surface and a lower surface. The horizontal radiating element is formed by patterning a metal plate on one side of the base substrate to form a horizontal polarization dipole. The vertical radiating element is disposed on the base substrate spaced apart from the horizontal radiating element, and is disposed to protrude on the base substrate to form a vertical polarization dipole. The horizontal power supply cable is connected to the horizontal radiating element through the lower surface of the base substrate to supply power. The vertical power supply cable is connected to the vertical radiating element through the lower surface of the base substrate to supply power. The housing covers the base substrate, the horizontal radiating element, and the vertical radiating element, and pulls the horizontal and vertical feeding cables downward to the outside. In this case, the housing includes a lower housing and an upper housing. The lower housing includes a drawer member that is installed at a lower portion of the base substrate, supports the base substrate, and separates the horizontal and vertical power supply cables installed on the lower surface of the base substrate and pulls them out to the outside. To do. The upper housing is coupled to an upper portion of the lower housing and covers a horizontal radiating element and a vertical radiating element installed on an upper surface of the base substrate.

  In the multiband antenna according to the present invention, the lower housing includes an installation plate and a drawer member. The installation plate is installed below the lower surface of the base substrate, and supports the base substrate by floating the base substrate through a plurality of support bases formed on the upper surface. The drawer member is installed so as to protrude from the lower surface of the installation plate, and the horizontal and vertical power supply cables installed on the lower surface of the base substrate are separated from each other and pulled out to the outside.

  In the multiband antenna according to the present invention, the lead-out member includes a fastening pipe and a pair of lead-out pipes. The fastening tube is installed so as to protrude from the lower surface of the installation plate, and a thread is formed on the outer peripheral surface. The pair of lead pipes are arranged in parallel with each other inside the fastening pipe, and the horizontal and vertical power supply cables installed on the lower surface of the base substrate are inserted and pulled out.

  In the multiband antenna according to the present invention, the pair of lead pipes described above is formed inside the ends of the fastening pipes, and the horizontal and vertical feeds are supplied to the fastening pipes below the ends of the pair of lead pipes. A drawing groove is formed for drawing the cable in a direction different from the direction in which the cable is drawn through the drawing tube.

  In the multiband antenna according to the present invention, the drawer member may be formed at a central portion of the installation plate.

  In the multiband antenna according to the present invention, the installation plate and the drawer member are integrally formed, and the horizontal and vertical feeding cables installed on the lower surface of the base substrate are respectively connected to the installation plate and the drawer member. A pair of drawer pipes that are drawn out to the outside can be arranged in parallel through the installation plate and the drawer member.

  Further, according to the present invention, a horizontal feed cable and a vertical feed cable are installed in which a horizontal radiating element and a vertical radiating element are installed on an upper surface and a lower surface opposite to the upper surface is connected to the horizontal radiating element and the vertical radiating element, respectively. Provided is a housing for a multiband antenna that covers a base substrate on which a feeding cable is installed. In this case, the housing includes a lower housing and an upper housing. The lower housing includes a drawer member that is installed at a lower portion of the base substrate, supports the base substrate, and separates the horizontal and vertical power supply cables installed on the lower surface of the base substrate and pulls them out to the outside. To do. The upper housing is coupled to the upper portion of the lower housing and covers a horizontal radiating element and a vertical radiating element installed on the upper surface of the base substrate.

  According to the present invention, since the horizontal and vertical feeding cables are separated from each other through the drawing member formed in the lower housing and pulled out to the outside, the separation characteristic between the horizontal radiating element and the vertical radiating element can be improved. it can. That is, when the horizontal and vertical feeding cables are brought close to each other and pulled out of the housing, there may be a problem that the separation characteristic between the horizontal radiating element and the vertical radiating element is deteriorated. When this is used, it is possible to suppress such deterioration of the separation characteristic.

  In addition, since the multiband antenna according to the present invention has a structure in which a horizontal radiating element and a vertical radiating element are integrally formed, it exhibits good antenna performance in various bands including a mobile communication frequency band. As a result, the multiband antenna according to the present invention can cover various bandwidths by installing only one antenna without arranging an additional antenna, so that the installation cost of the antenna can be reduced. Problems due to securing space can be minimized.

  Also, MIMO can be implemented using a horizontal radiating element and a vertical radiating element included in the multiband antenna according to the present invention. That is, a horizontal radiating element is patterned on one side of the base substrate to implement a horizontal polarization dipole, and a vertical radiating element is installed so as to protrude from the other upper surface of the printed circuit board, thereby realizing a vertical polarization dipole. MIMO that supports multiple bands is possible.

  In addition, since the multiband antenna according to the present invention can implement a horizontal radiating element and a vertical radiating element on a base substrate, the manufacturing process of the antenna can be simplified.

FIG. 1 is an exploded perspective view illustrating a multiband antenna having a housing according to an embodiment of the present invention. FIG. 2 is a perspective view illustrating a state in which the multiband antenna of FIG. 1 is assembled. FIG. 3 is a side view of FIG. FIG. 4 is a perspective view showing the lower housing of FIG. 5 is a bottom perspective view of the lower housing of FIG. 6 is a partial cross-sectional view of the lower housing of FIG. FIG. 7 is a perspective view illustrating an antenna element of a multiband antenna according to an embodiment of the present invention. 8 is a bottom perspective view of FIG. FIG. 9 is a perspective view showing a horizontal radiating element patterned on the base substrate of FIG. FIG. 10 is an enlarged view of a portion “A” in FIG. FIG. 11 is a perspective view illustrating a vertical radiating element installed on the base substrate of FIG. FIG. 12 is a graph showing a vertical radiation pattern in multiple bands of the horizontal radiation element of FIG. FIG. 13 is a graph showing a vertical radiation pattern in multiple bands of the horizontal radiation element of FIG. FIG. 14 is a graph showing a vertical radiation pattern in multiple bands of the horizontal radiation element of FIG. FIG. 15 is a graph showing a vertical radiation pattern in multiple bands of the vertical radiation element of FIG. FIG. 16 is a graph showing a vertical radiation pattern in multiple bands of the vertical radiation element of FIG. FIG. 17 is a graph showing a vertical radiation pattern in multiple bands of the vertical radiation element of FIG. FIG. 18 is a graph showing the voltage standing wave ratio VSWR of the horizontal radiating element of FIG. FIG. 19 is a graph showing the voltage standing wave ratio VSWR of the vertical radiating element of FIG. FIG. 20 is a graph showing the separation characteristics of the horizontal and vertical elements of the multiband antenna of FIG.

  In the following description, it should be noted that only the portions necessary for understanding the embodiments of the present invention are described, and the descriptions of other portions are omitted so as not to obscure the gist of the present invention. .

  Terms and words used in the specification and claims described below should not be construed to be limited to ordinary or lexicographic meanings, and the inventor shall make his invention the best way. Therefore, it should be interpreted as a meaning or concept consistent with the technical idea of the present invention based on the principle that the term can be appropriately defined as a concept of terms. Therefore, the embodiments described in the present specification and the configurations shown in the drawings are only preferred embodiments of the present invention and do not represent all the technical ideas of the present invention. It should be understood that there can be various equivalents and variations that can be substituted.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.

  FIG. 1 is an exploded perspective view illustrating a multiband antenna having a housing according to an embodiment of the present invention. FIG. 2 is a perspective view illustrating a state in which the multiband antenna of FIG. 1 is assembled. FIG. 3 is a side view of FIG.

  1 to 3, the multiband antenna 100 according to the present embodiment includes an antenna element and a housing 60 that protects the antenna element. The antenna element includes a base substrate 10, a horizontal radiating element 20, a vertical radiating element 30, a horizontal feeding cable 40 and a vertical feeding cable 50. Here, the base substrate 10 is provided with the horizontal radiating element 20 and the vertical radiating element 30 on the upper surface 12. The base substrate 10 is provided with a horizontal feeding cable 40 and a vertical feeding cable 50 that are connected to the horizontal radiating element 20 and the vertical radiating element 30 and are fed to the lower surface 14 opposite to the upper surface 12. The housing 60 covers the base substrate 10, the horizontal radiating element 20, and the vertical radiating element 30, and draws out the horizontal and vertical feeding cables 40 and 50 downward.

  At this time, the housing 60 protects the base substrate 10, the horizontal radiating element 20 and the vertical radiating element 30 from the external environment, and a portion where the multiband antenna 100 is installed in a facility installed on the inner wall, ceiling or ceiling of the building. provide.

  Such a housing 60 includes a lower housing 70 and an upper housing 80. The housing 60 can be made of a plastic material.

  The lower housing 70 is installed below the base substrate 10 and supports the base substrate 10. The lower housing 70 includes a drawing member 75 that draws the horizontal and vertical power supply cables 40 and 50 installed on the lower surface 14 of the base substrate 10 apart from each other.

  The upper housing 80 is coupled to the upper portion of the lower housing 70 and covers the horizontal radiating element 20 and the vertical radiating element 30 installed on the upper surface 12 of the base substrate 10.

  At this time, the antenna element of the housing 60 is located in an internal space 61 formed by combining the lower housing 70 and the upper housing 80. Of course, the horizontal feeding cable 40 and the vertical feeding cable 50 of the antenna element are drawn out through the lower housing 70.

  Hereinafter, the multiband antenna 100 according to the present embodiment will be described with reference to FIGS.

  First, the housing 60 of the multiband antenna 100 according to the present embodiment will be described with reference to FIGS. Here, FIG. 4 is a perspective view showing the lower housing 70 of FIG. FIG. 5 is a bottom perspective view of the lower housing 70 of FIG. FIG. 6 is a partial cross-sectional view of the lower housing 70 of FIG.

  The lower housing 70 includes an installation plate 71 and a drawer member 75 formed at the lower portion of the installation plate 71. The installation plate 71 and the drawer member 75 can be integrally formed, or the drawer member 75 can be formed on the installation plate 71 through a physical coupling method. Various methods such as an adhesive method, a screw connection method, and a fitting method can be used as the physical connection method.

  The installation plate 71 is installed below the lower surface 14 of the base substrate 10, and supports the base substrate 10 by floating through a plurality of support bases 72 formed on the upper surface.

  At this time, the installation plate 71 has a size that can include the base substrate 10, and can be formed in a form corresponding to the outer shape of the base substrate 10. In the present embodiment, since the base substrate 10 is formed of a disc, the installation plate 71 can also be formed of a disc.

  A plurality of support bases 72 protrude from the upper surface of the installation plate 71 so that the base substrate 10 can be stably floated and supported. The through hole 16 is formed in the base substrate 10 so as to correspond to the plurality of support bases 72. In the installation plate 71, a plurality of first fastening holes 73 that can be coupled to the upper housing 80 are formed in the outer portion of the installed base substrate 10.

  The reason for floating the base substrate 10 with respect to the installation plate 71 is that the horizontal and vertical power supply cables 40 and 50 installed on the lower surface 14 of the base substrate 10 are inserted into the drawing member 75 via the installation plate 71 and externally. This is to secure a space that can be pulled out. Further, this is to prevent a physical impact from being transmitted to the antenna element via the base substrate 10 via the housing 60.

  The drawer member 75 is installed so as to protrude from the lower surface of the installation plate 71, and the horizontal and vertical power supply cables 40 and 50 installed on the lower surface 14 of the base substrate 10 are separated from each other and drawn out to the outside.

  Such a drawer member 75 includes a fastening pipe 76 and a pair of drawer pipes 78. The drawer member 75 can be formed at the central portion of the installation plate 71.

  The fastening tube 76 is installed so as to protrude from the lower surface of the installation plate 71, and a thread 77 is formed on the outer peripheral surface. The multi-band antenna 100 can be installed on the inner wall, ceiling, or facility installed on the ceiling using the fastening pipe 76.

  The pair of lead-out pipes 78 are arranged in parallel in the fastening pipe 76 so as to be spaced apart from each other, and the horizontal and vertical power supply cables 40 and 50 installed on the lower surface 14 of the base substrate 10 are inserted and pulled out. At this time, the lead-out pipe 78 is exposed at the upper surface of the installation plate 71 so that the horizontal and vertical power supply cables 40 and 50 installed on the lower surface 14 of the base substrate 10 can be inserted. Thus, the outlet 78b is exposed at the lower portion of the fastening pipe 76 so that the horizontal and vertical power feeding cables 40, 50 inserted into the inlet 78a can be pulled out.

  In the present embodiment, the installation plate 71 and the drawer member 75 are integrally formed, and the horizontal and vertical feeding cables 40 and 50 installed on the lower surface 14 of the base substrate 10 are externally connected via the installation plate 71 and the drawer member 75, respectively. A pair of drawer pipes 78 can be arranged in parallel through the installation plate 71 and the drawer member 75. At this time, the pair of lead pipes 78 are arranged side by side so as to be separated from each other, so that the horizontal radiating element 20 is perpendicular to the horizontal radiation element 20 due to the proximity between the horizontal and vertical feeding cables 40 and 50 inserted into the pair of lead pipes 78. The problem that the isolation characteristic between the radiating elements 30 deteriorates can be solved.

  Since the drawer member 75 is formed in a direction perpendicular to the installation plate 71, the horizontal and vertical power supply cables 40 and 50 drawn basically through the drawer member 75 are pulled out to the outside in a direction perpendicular to the installation plate. Can be.

  In addition, in the lower housing 70 according to the present embodiment, the horizontal and vertical feeding cables 40 and 50 drawn out through the drawing member 75 are connected to the horizontal and vertical feeding cables 40 and 50 in a direction different from the direction in which the drawing member 75 is installed. A drawer groove 79 is formed in the lower portion of the fastening tube 76 so that it can be installed. In other words, the pair of lead pipes 78 is formed inside the ends of the fastening pipes 76, and the horizontal and vertical feeding cables 40, 50 are connected to the lead pipes 78 in the fastening pipes 76 below the ends of the pair of lead pipes 78. A drawing groove 79 is formed in a direction different from the direction drawn through. For example, the horizontal and vertical power supply cables can be drawn out in a direction horizontal to the installation plate through the drawing groove.

  Next, antenna elements of the multiband antenna 100 according to the embodiment of the present invention will be described with reference to FIGS.

  FIG. 7 is a perspective view illustrating an antenna element of the multiband antenna 100 according to the embodiment of the present invention. 8 is a bottom perspective view of FIG. Here, in FIG.7 and FIG.8, illustration of the housing was abbreviate | omitted.

  Referring to FIGS. 7 and 8, the multiband antenna 100 according to the present embodiment includes a base substrate 10, a horizontal radiating element 20, a vertical radiating element 30, a horizontal feeding table 40, and a vertical feeding cable 50. In the multiband antenna 100 according to the present embodiment, the horizontal radiating element 20 and the vertical radiating element 30 are arranged together on the base substrate 10, and the horizontal feeding cable 40 feeds the horizontal radiating element 20 and the vertical radiating element 30 to each. And the vertical feeding cable 50 are connected through the base substrate 10. That is, since the multiband antenna 100 according to the present embodiment can radiate horizontal polarization using the horizontal radiating element 20 and vertical polarization using the vertical radiating element 30, it can cover the multiband.

  The base substrate 10 has an upper surface 12 and a lower surface 14 as insulating materials. As a material of the base substrate 10, plastic, epoxy, FR4, tepron, flexible film, ceramic, or the like can be used for double-sided PCB. Although the example in which the base substrate 10 is manufactured in a disk shape is disclosed, the base substrate 10 can be manufactured in a polygonal shape such as a triangle, a square, a pentagon, and a hexagon, or an ellipse.

  A horizontal radiating element 20 and a vertical radiating element 30 are disposed on both sides of the base substrate 10. The base radiating element 20 and the vertical radiating element 30 are formed to be separated from each other on the base substrate 10 so that the isolation between the horizontal radiating element 20 and the vertical radiating element 30 is 20 dB or more, for example, 20 to 30 dB. As will be described later, since the horizontal and vertical feeding cables 40 and 50 are drawn apart from each other through a drawing member formed in the housing, the separation characteristic between the horizontal radiating element 20 and the vertical radiating element 30 is improved. be able to.

  The horizontal radiating element 20 is formed by patterning a metal plate on one side of the base substrate 10 to form a horizontal polarization dipole. As a material of the metal plate, a metal material such as copper or aluminum can be used.

  The vertical radiating element 30 is disposed on the base substrate 10 separated from the horizontal radiating element 20. The vertical radiating element 30 is installed so as to protrude on the base substrate 10 and forms a vertical polarization dipole.

  The horizontal power supply cable 40 is connected to the horizontal radiating element 20 through the lower surface 14 of the base substrate 10 and supplies power. As such a horizontal feeding cable 40, a coaxial cable including a first core wire 41 and a first ground wire 43 is used.

  The vertical power supply cable 50 is connected to the vertical radiation element 30 via the lower surface 14 of the base substrate 10 and supplies power. As such a vertical power feeding cable 50, a coaxial cable including a second core wire 51 and a second ground wire 53 is used. At this time, the horizontal power supply cable 40 and the vertical power supply cable 50 are joined to the horizontal and vertical radiating elements 20 and 30 so as to be drawn downward through the center of the lower surface 14 of the base substrate 10. It is installed on the base substrate 10.

  The multiband antenna 100 according to the present embodiment can be used for indoors, and can be used as an antenna for various other purposes.

  Hereinafter, the horizontal radiating element 20 of the multiband antenna 100 according to the present embodiment will be described with reference to FIGS. Here, FIG. 9 is a perspective view showing the horizontal radiating element 20 patterned on the base substrate 10 of FIG.

  Referring to FIGS. 7 to 9, the horizontal radiating element 20 includes a first horizontal radiating pattern 21, a second horizontal radiating pattern 23, and a first feeding pattern 25. The first horizontal radiation pattern 21 is formed on the lower surface 14 of the base substrate 10. The second horizontal radiation pattern 23 is formed on the upper portion of the base substrate 10 so as to be separated from the first horizontal radiation pattern 21 transferred from the lower surface 14 to the upper surface 12 of the base substrate 10. The first power supply pattern 25 is connected to the second horizontal radiation pattern 23 and supplies power to the second horizontal radiation pattern 23 via the horizontal power supply cable 40.

  At this time, the first and second horizontal radiation patterns 21 and 23 are arranged so as to face each other, and the first and second horizontal radiation patterns 21 are vertically arranged with respect to a virtual line passing through the center of the base substrate 10. 23 is arranged.

  The first power feeding pattern 25 includes a first core wire hole 27 and a first power feeding line 29. The first core wire hole 27 is formed through the base substrate 10, and the first core wire 41 of the horizontal power supply cable 40 is inserted and joined thereto. The first power supply line 29 extends from the first core wire hole 27 and is formed on the upper surface 12 of the base substrate 10, and connects the first core wire hole 27 and the second horizontal radiation pattern 23.

  The first core wire hole 27 is formed inside the first horizontal radiation pattern 21 and is formed in an island shape so as to be electrically separated from the first horizontal radiation pattern 21. The first core wire 41 of the horizontal power supply cable 40 protruding from the upper surface 12 of the base substrate 10 through the first core wire hole 27 is joined to the upper surface 12 of the base substrate 10 by soldering. As a result, the first core wire 41 is electrically connected to the first power supply line 29 via the first core wire hole 27.

  The first ground line 43 of the horizontal power supply cable 40 is joined to the first horizontal radiation pattern 21 by soldering.

  In addition, although not illustrated, the multiband antenna 100 according to the present embodiment may further include a case for protecting the base substrate 10, the horizontal radiating element 20, and the vertical radiating element 30 from the external environment.

  Hereinafter, the vertical radiating element 30 of the multiband antenna 100 according to the present embodiment will be described with reference to FIGS. 7, 8, 10, and 11. Here, FIG. 10 is an enlarged view of a portion “A” in FIG. FIG. 11 is a perspective view showing the vertical radiating element 30 installed on the base substrate 10 of FIG.

  Referring to FIGS. 7, 8, 10, and 11, the vertical radiating element 30 includes a vertical radiating pattern 31, a vertical radiating plate 32, and a second feed pattern 38. The vertical radiation pattern 31 is formed by patterning a metal plate on the lower surface 14 of the base substrate 10. The vertical radiation plate 32 is installed on the upper surface 12 of the base substrate 10 above the vertical radiation pattern 31. The second power feeding pattern 38 is connected to the vertical radiation plate 32 and feeds power to the vertical radiation plate 32 via the vertical power feeding cable 50.

  At this time, the vertical radiation plate 32 is disposed at the central portion inside the vertical radiation pattern 31. The vertical radiation pattern 31 may be formed close to an ellipse so as to be symmetric about the vertical radiation plate 32. The vertical radiation pattern 31 needs to be formed to have a sufficient area and length so as to have good antenna characteristics, that is, a good standing wave ratio. Therefore, the vertical radiation pattern 31 is formed in an oval shape that is long in the direction in which the horizontal radiation patterns 21 and 23 are formed. That is, since the horizontal radiating element 20 is arranged on one side with respect to the center of the base substrate 10 and the vertical radiating element 30 is arranged on the other side, a sufficient length is ensured on the semicircle on which the vertical radiating element 30 is arranged. For this purpose, it is preferable to form the vertical radiation pattern 31 in the diameter direction of the semicircle.

  The vertical radiation plate 32 includes a power supply base 33 and a plurality of radiation plates 34. The power supply base 33 is joined to the second power supply line 38 b, and the lower part is fixedly installed on the base substrate 10. The plurality of radiation plates 34 are installed in a radial shape on the upper side of the power supply base 33 with the power supply base 33 as an axis. The plurality of radiation plates 34 are four, and adjacent radiation plates 34 can be arranged such that the angle between the plates is 90 degrees. That is, the plurality of radiation plates 34 can be formed on the power supply base 33 in a cross shape.

  At this time, the power supply base 33 is made of an insulating material, and the lower part is coupled to the base substrate 10. On the surface of the power supply base 33, a connection wiring 33 a that can supply power to the plurality of radiation plates 34 is formed. The connection wiring 33 a is not connected to the vertical radiation pattern 31.

  The radiating plate 34 includes an insulating radiating plate body 35, and a radiating metal plate 36 that is formed on both surfaces of the radiating plate body 35 and is electrically connected to the power supply base 33. That is, the radiation plate 34 can be manufactured with a printed circuit board.

  At least one radiation plate 34 of the plurality of radiation plates 34 may further include a support base 37. The support base 37 extends from the radiation plate body 35 to the base substrate 10 and is fixedly installed on the base substrate 10. That is, the support base 37 serves to stably support the vertical radiation plate 32 on the base substrate 10. In the present embodiment, an example in which the support base 37 is formed on each of the plurality of radiation plates 34 has been disclosed.

  The second power feeding pattern 38 includes a second core wire hole 38a and a second power feeding line 38b. The second core wire hole 38a is formed through the base substrate 10, and the second core wire 51 of the vertical feeding cable 50 is inserted and joined thereto. The second core hole 38 a is separated from the vertical radiation pattern 31 and is formed in an island shape in the vertical radiation pattern 31. The second power supply line 38 b extends from the second core wire hole 38 a and is formed on the upper surface 12 of the base substrate 10, and connects the second core wire hole 38 a and the vertical radiation plate 32.

  The second core wire hole 38a is formed inside the vertical radiation pattern 31 and is formed in an island shape so as to be separated from the vertical radiation pattern 31 from electrical. The second core wire 51 of the vertical feeding cable 50 protruding to the upper surface 12 of the base substrate 10 through the second core wire hole 38a is joined to the upper surface 12 of the base substrate 10 by soldering. Thereby, the 2nd core wire 51 is electrically connected with the 2nd electric supply line 38b via the 2nd core wire hole 38a.

  Further, the second ground line 53 of the vertical power feeding cable 50 is joined to the vertical radiation pattern 31 by soldering via the lower surface 14 of the base substrate 10.

  It can be confirmed that the multiband antenna 100 according to the present embodiment exhibits good antenna characteristics in the multiband as shown in FIGS. 12 to 17.

  12 to 14 are graphs showing horizontal radiation patterns in multiple bands of the horizontal radiation element of FIG.

  First, as shown in FIGS. 12 to 14, the horizontal radiating element of the multiband antenna according to the present embodiment exhibits good antenna characteristics in a multiband of 738 MHz to 3600 MHz. For example, the horizontal radiating element of the multiband antenna according to the present embodiment confirms a good horizontal radiation pattern in the 738 MHz to 3600 MHz band (738 MHz to 960 MHz (FIG. 12), 1427 MHz to 2575 MHz (FIG. 13), and 3400 to 3600 MHz (FIG. 14)). can do.

  15 to 17 are graphs showing vertical radiation patterns in multiple bands of the vertical radiation element of FIG.

  Next, as shown in FIGS. 15 to 17, the vertical radiating elements of the multiband antenna according to the present embodiment are 738 MHz to 960 MHz (FIG. 15), 1427 MHz to 2575 MHz (FIG. 16), and 3400 MHz to 3600 MHz (see FIG. 15). 17) A good vertical radiation pattern can be confirmed in the band.

  FIG. 18 is a graph showing the voltage standing wave ratio VSWR of the horizontal radiating element of FIG. FIG. 19 is a graph showing the voltage standing wave ratio VSWR of the vertical radiating element of FIG.

18 and 19, it can be seen that the multiband antenna according to the present embodiment has a good voltage standing wave ratio VSWR in various frequency bands between 738 MHz and 3600 MHz. 2 is a graph showing the separation characteristics of horizontal and vertical elements of the multiband antenna of FIG. 1.

  Further, as shown in FIG. 20, it can be seen that the multi-band antenna according to the present embodiment has good separation characteristics between horizontal and vertical radiating elements.

  On the other hand, in the present embodiment, the example in which the horizontal and vertical feeding cables 40 and 50 are directly bonded to the base substrate 10 is disclosed, but the present invention is not limited to this. For example, the horizontal or vertical power supply cable can be joined to the base substrate through the connection terminal. The first connection terminal used for the horizontal power supply cable is a tube having both opened, the horizontal power supply cable is inserted and the first ground line of the horizontal power supply cable is joined, and the lower part is the first horizontal radiation pattern. To be joined. The first core wire of the horizontal power supply cable is joined to the first core wire hole via the connection terminal.

  Such a first connection terminal may include a terminal body and a plurality of connection pins. The terminal body has a tubular shape in which both are opened, and a horizontal feeding cable is inserted, and a first grounding wire of the horizontal feeding cable is joined. The plurality of connection pins are formed at the lower portion of the terminal body, and are inserted into and joined to the plurality of first connection holes formed in the first horizontal radiation pattern. At this time, a first core wire hole is formed between the plurality of first connection holes.

  In addition, the second connection terminal used for the vertical power supply cable can also have the same structure as the first connection terminal.

  Alternatively, one end of the connection terminal may be joined to the base substrate, and a horizontal or vertical power supply cable may be electrically connected to the other end by a mechanical coupling method.

  On the other hand, the embodiments disclosed in this specification and the drawings are merely specific examples provided to assist understanding, and are not intended to limit the scope of the present invention. It will be apparent to those skilled in the art to which the present invention pertains that other variations based on the technical idea of the present invention can be implemented in addition to the embodiments disclosed herein.

Claims (19)

An insulating base substrate having an upper surface and a lower surface;
A horizontal radiating element formed by patterning a metal plate on one side of the base substrate to form a horizontally polarized dipole;
A vertical radiating element disposed on the base substrate spaced apart from the horizontal radiating element, disposed so as to protrude above the base substrate, and forming a vertically polarized dipole;
A horizontal feeding cable coupled to the horizontal radiating element via the lower surface of the base substrate and feeding power;
A vertical feeding cable coupled to the vertical radiating element through the lower surface of the base substrate to feed power;
A multi-band antenna comprising: The horizontal radiating element is:
A first horizontal radiation pattern formed on a lower surface of the base substrate;
A second horizontal radiation pattern formed on the upper surface of the base substrate so as to be spaced apart from the first horizontal radiation pattern transferred from the lower surface of the base substrate to the upper surface;
A first feeding pattern coupled to the second horizontal radiation pattern and feeding the second horizontal radiation pattern via the horizontal feeding cable;
The multiband antenna according to claim 1, comprising: The first power feeding pattern is:
A first core wire hole formed through the base substrate and into which the first core wire of the horizontal feeding cable is inserted and joined;
A first feed line extending from the first core wire hole and formed on an upper surface of the base substrate and connecting the first core wire hole and the second horizontal radiation pattern;
The multiband antenna according to claim 2, comprising: Wherein the first core line hole, multi-band antenna according to claim 3, wherein the first spaced apart from said first horizontal radiation pattern in the horizontal radiation pattern within and being formed in an island shape.   The multiband antenna according to claim 4, wherein the first ground line of the horizontal feed cable is joined to the first horizontal radiation pattern. The vertical radiating element is:
A vertical radiation pattern formed by patterning a metal plate on a lower surface of the base substrate;
A vertical radiation plate installed on an upper surface of the base substrate above the vertical radiation pattern;
A second feeding pattern connected to the vertical radiation plate and feeding the vertical radiation plate via the vertical feeding cable;
The multiband antenna according to claim 1, comprising: The second power feeding pattern is:
A second core wire hole formed through the base substrate, into which the second core wire of the vertical feeding cable is inserted and joined, and spaced apart from the vertical radiation pattern and formed in an island shape in the vertical radiation pattern; ;
A second feed line extending from the second core wire hole and formed on an upper surface of the base substrate and connecting the second core wire hole and the vertical radiation plate;
The multiband antenna according to claim 6, comprising:   The multiband antenna according to claim 7, wherein the second ground line of the vertical feeding cable is joined to the vertical radiation pattern. The vertical radiation plate is disposed in a central portion inside the vertical radiation pattern;
The multiband antenna according to claim 8, wherein the vertical radiation pattern is formed in an elliptical shape so as to be symmetrical with respect to the vertical radiation pattern. The vertical radiation plate is
A power supply base joined to the second power supply line;
A plurality of radiation plates installed in a radial shape around the power supply base on the power supply base;
The multiband antenna according to claim 9, comprising:   The multiband antenna according to claim 10, wherein the plurality of radiation plates is four, and adjacent radiation plates are arranged so that an angle between the plates is 90 degrees. Each of the plurality of radiation plates is
An insulating radiation plate fuselage;
A radiating metal plate formed on both sides of the radiating plate body and electrically connected to the feeding base;
The multiband antenna according to claim 11, comprising: At least one radiation plate of the plurality of radiation plates is
An insulating support that extends from the radiation plate body to the base substrate and is fixed to the base substrate;
The multiband antenna according to claim 12, further comprising:   The multi-band antenna according to claim 13, wherein a separation degree between the vertical radiating element and the horizontal radiating element is formed on the base substrate so as to have 20 to 30 dB. An insulating base substrate having an upper surface and a lower surface;
A horizontal radiating element formed by patterning a metal plate on one side of the base substrate to form a horizontally polarized dipole;
A vertical radiating element disposed on the base substrate spaced apart from the horizontal radiating element, disposed so as to protrude above the base substrate, and forming a vertically polarized dipole;
A horizontal feeding cable coupled to the horizontal radiating element via the lower surface of the base substrate and feeding power;
A vertical feeding cable coupled to the vertical radiating element through the lower surface of the base substrate to feed power;
A housing that covers the base substrate, the horizontal radiating element and the vertical radiating element, and pulls out the horizontal and vertical feed cables downward.
The housing is
A lower housing provided at a lower portion of the base substrate to support the base substrate, and having a drawer member that separates the horizontal and vertical power supply cables installed on the lower surface of the base substrate and pulls them out to the outside;
An upper housing coupled to an upper portion of the lower housing and covering a horizontal radiating element and a vertical radiating element installed on an upper surface of the base substrate;
A multi-band antenna comprising: The lower housing is
An installation plate installed below the lower surface of the base substrate and supporting the base substrate by floating the base substrate through a plurality of support bases formed on the upper surface;
A drawer member installed so as to protrude from the lower surface of the installation plate and pulling out the horizontal and vertical power supply cables installed on the lower surface of the base substrate to be separated from each other;
The multiband antenna according to claim 15, comprising: The drawer member is
A fastening pipe installed to protrude from the lower surface of the installation plate and having a thread formed on the outer peripheral surface;
A pair of lead-out pipes arranged side by side in the fastening pipe so as to be spaced apart from each other and from which the horizontal and vertical feeding cables are inserted and drawn;
The multiband antenna according to claim 16, comprising:   The pair of lead pipes are formed on the inner side of the end portions of the fastening pipes, and the horizontal and vertical feeding cables are led out through the lead pipes to the fastening pipes below the end portions of the pair of lead pipes. The multiband antenna according to claim 17, wherein a lead-out groove is formed in a direction different from the projected direction.   The installation plate and the drawer member are integrally formed, and a pair of drawer pipes for drawing the horizontal and vertical feeding cables installed on the lower surface of the base substrate to the outside through the installation plate and the drawer member, respectively. The multi-band antenna according to claim 16, wherein the multi-band antenna is arranged in parallel through the installation plate and the drawer member.

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