Monopole antenna

Abstract

A monopole antenna includes: an antenna portion including a monopole structure disposed perpendicular to the ground; a signal feeding portion configured to provide a signal to be fed to the antenna portion; a signal transmission portion arranged parallel to the ground and connected to the antenna portion and the signal feeding portion to transmit a signal to the antenna portion; and a base portion provided between the ground and the signal transmission portion to support the signal transmission portion, in which the antenna portion includes a shape in which a plurality of cylinders having different radii are connected together.

Description

Technical Field

[0001] The present disclosure relates to a monopole antenna. Background Art

[0002] The content described in this section provides only background information for the present disclosure and does not form prior art.

[0003] With the development of wireless communication technology, various types of wireless communication antennas are installed on vehicles to provide various types of wireless communication services to passengers in the vehicles. Most antennas for various in-vehicle infotainment (IVI) services (such as AM / FM radio, DMB / DAB, SXM, GNSS, and CCS / eCall) are built into the roof antennas of vehicles. Generally, the roof antenna has a large number of antennas built into a shark fin-shaped cover and is installed on the rear side of the vehicle roof. Since the vehicle roof panel is made of metal and has a large area, the antennas built into the shark fin-shaped cover are based on monopole antennas.

[0004] During the vehicle development stage, the antenna gain at each frequency is measured in an actual vehicle chamber in a non-reflective environment to verify the antenna performance. In this case, the performance applicability of the antenna to be measured is determined with an ideal monopole antenna as a reference. The ideal monopole antenna has a 1 / 4 wavelength of the operating frequency, is disposed perpendicular to the ground above, and the signal transmission part and / or the signal feeding part are disposed parallel to the ground. In addition, structures (such as conductors and dielectrics) that may have an impact on the field distribution should not exist around the radiator.

[0005] Therefore, an ideal monopole antenna structure for determining performance applicability during the antenna development stage is needed.

[0006] The information included in this background of the present disclosure is only for enhancing the understanding of the general background of the present disclosure and may not be regarded as an admission or suggestion in any form that this information forms prior art known to those skilled in the art. Summary of the Invention

[0007] Aspects of the present disclosure are directed to providing a monopole antenna, comprising: an antenna part including a monopole structure disposed perpendicular to the ground; a signal feeding part configured to provide a signal to be fed to the antenna part; a signal transmission part disposed parallel to the ground and connected to the antenna part and the signal feeding part to transmit the signal to the antenna part; and a base disposed between the ground and the signal transmission part to support the signal transmission part, wherein the antenna part has a shape in which a plurality of cylinders having different radii are connected together.

[0008] The methods and apparatuses of the present disclosure have other features and advantages that will be apparent from or more particularly set forth in the accompanying drawings incorporated herein and the following detailed description, which together are used to explain certain principles of the present disclosure. Description of the Drawings

[0009] Figure 1 is a perspective view of a monopole antenna according to an exemplary embodiment of the present disclosure.

[0010] Figure 2 is a perspective view of a monopole antenna without a cover according to an exemplary embodiment of the present disclosure and is a view exemplarily showing the internal structure.

[0011] Figure 3 is an exploded perspective view of a monopole antenna according to an exemplary embodiment of the present disclosure.

[0012] Figure 4 is a side view of a monopole antenna according to an exemplary embodiment of the present disclosure and is a view exemplarily showing the internal structure.

[0013] Figure 5 is a plan view of a signal transmission part according to an exemplary embodiment of the present disclosure.

[0014] Figure 6A and Figure 6B are frequency - return loss diagrams for the case where the antenna part includes a cylindrical shape with a constant radius and the case where the antenna part includes a shape in which a plurality of cylinders with different radii are connected together.

[0015] It will be understood that the drawings are not necessarily to scale and present a somewhat simplified representation of various features illustrating the basic principles of the present disclosure. Certain design features of the present disclosure as included herein (including, for example, specific dimensions, orientations, positions, and shapes) will be determined in part by the particular intended application and use environment.

[0016] In the drawings, throughout several views of the drawings, reference numerals refer to the same or equivalent parts of the present disclosure. Detailed Description

[0017] Reference will now be made in detail to various embodiments of the present disclosure, examples of which are illustrated in the accompanying drawings and described below. Although the present disclosure will be described in conjunction with the exemplary embodiments of the present disclosure, it should be understood that this specification is not intended to limit the present disclosure to those exemplary embodiments. On the contrary, the present disclosure is intended to cover not only the exemplary embodiments of the present disclosure, but also various alternatives, modifications, equivalents, and other embodiments that may be included within the spirit and scope of the present disclosure as defined by the appended claims.

[0018] The monopole antenna according to an exemplary embodiment may provide an ideal monopole antenna structure for determining performance applicability during the antenna development stage.

[0019] The monopole antenna according to an exemplary embodiment may provide a stable structure through a shape in which cylinders having different radii are connected together, and may expand the bandwidth of the antenna.

[0020] The monopole antenna according to an exemplary embodiment may effectively transmit a signal by implementing a signal transmission part as a printed circuit board (PCB) type in which a transmission line is formed.

[0021] The problems to be solved as exemplary embodiments of the present disclosure are not limited to the above problems, and those skilled in the art will clearly understand other problems not mentioned from the following description.

[0022] Hereinafter, some exemplary embodiments of the present disclosure will be described in detail with reference to the accompanying drawings. In the following description, the same reference numerals preferably denote the same elements, although the elements are shown in different drawings. In addition, in the following description of various exemplary embodiments of the present disclosure, for clarity and conciseness, detailed descriptions of known functions and configurations incorporated therein will be omitted.

[0023] In addition, various terms such as first, second, A, B, (a), (b), etc. are only used to distinguish one component from another component, and do not imply or suggest the substance, order, or sequence of the components. Throughout this specification, when a part "includes" or "comprises" a component, this part means further including other components without excluding the component, unless stated to the contrary. Terms such as "unit", "module", etc. refer to one or more units for processing at least one function or operation, which may be implemented by hardware, software, or a combination thereof.

[0024] Figure 1 is a perspective view of a monopole antenna according to an exemplary embodiment of the present disclosure.

[0025] Figure 2 is a perspective view of a monopole antenna according to an exemplary embodiment of the present disclosure without a cover, and is a view exemplarily showing an internal structure.

[0026] Figure 3 is an exploded perspective view of a monopole antenna according to an exemplary embodiment of the present disclosure.

[0027] Figure 4 is a side view of a monopole antenna according to an exemplary embodiment of the present disclosure, and is a view exemplarily showing an internal structure.

[0028] Figure 5It is a plan view of a signal transmission part according to an exemplary embodiment of the present disclosure.

[0029] See Figure 1 、 Figure 2 、 Figure 3 、 Figure 4 and Figure 5 According to

[0030] the monopole antenna 100 according to an exemplary embodiment of the present disclosure includes an antenna part 110, a signal transmission part 210, a signal feeding part 120, a base 130, an adhesion part 220, and a cover 140.

[0031] The antenna part 110 may include a rod 310 and a connection member 320.

[0032] The connection member 320 may include a first connection part 321, a second connection part 322, and a third connection part 323.

[0033] The signal transmission part 210 may include a through hole 510 and a first connection hole 520.

[0034] The base 130 may include a second connection hole (shown as being penetrated by a penetration protrusion 221 in Figure 2 、 Figure 3 etc.).

[0035] The adhesion part 220 may include a penetration protrusion 221.

[0036] The antenna part 110 may be formed to extend longer in a monopole structure. The antenna part 110 may be disposed perpendicular to the ground E. The antenna part 110 is connected to the signal transmission part 210. The antenna part 110 may receive a signal provided from the signal feeding part 120 through the signal transmission part 210. The antenna part 110 may be disposed perpendicular to the signal transmission part 210, the signal feeding part 120, the base 130, the adhesion part 220, and / or the ground E. The antenna part 110 is supported by the signal transmission part 210, the base 130, the ground E, etc.

[0037] The antenna part 110 may be formed in a shape in which a plurality of cylinders having different radii are connected together. In this case, the antenna part 110 may be configured as separate cylinders having different radii connected to each other, or may be configured as a cylinder formed integrally. Further, when the antenna part 110 includes a shape in which a plurality of cylinders having different radii are connected together, the cylinders do not include a smooth outer surface, and the surface may be formed in a spiral shape or the like. Regarding the shape of the antenna part 110, the antenna part 110 may include a rod 310 and a connection member 320. The rod 310 may include a body part 311 and an extension part 312. The connection member 320 may include a first connection part 321, a second connection part 322, and a third connection part 323, and at least some of these connection parts may have different radii. This makes it possible to expand the antenna bandwidth while including a stable support structure. The effect of antenna bandwidth expansion will be described below with reference to FIG. 6.

[0038] The rod 310 is formed to extend long in the shape of a rod or the like. The rod 310 may include a body part 311 connected to the connection member 320 and an extension part 312 extending long from the body part 311. The radius of the body part 311 may be greater than the radius of the extension part 312. Accordingly, a stable support structure may be obtained. At least a part (for example, the first connection part 321) of the connection member 320 is inserted into a receiving groove 410, and the receiving groove 410 may be formed in at least a part of the body part 311. The rod 310 may be coupled to the connection member 320 by inserting the first connection part 321 of the connection member 320 into the receiving groove 410. The rod 310 and the connection member 320 may be coupled by a threaded structure. Accordingly, the rod 310 and the connection member 320 are configured to be easily coupled and separated, and the rod may be easily replaced with a rod 310 having a length corresponding to 1 / 4 wavelength of the operating frequency according to the use or the like.

[0039] The connecting member 320 connects the rod 310 to the signal transmission part 210. The connecting member 320 may include a first connecting part 321 connected to the rod 310, a third connecting part 323 connected to the signal transmission part 210, and a second connecting part 322 disposed between the first connecting part 321 and the third connecting part 323. The first connecting part 321, the second connecting part 322, and the third connecting part 323 may be integrally formed. The connecting member 320 may be made of a metallic material. The first connecting part 321 may be inserted into a receiving groove 410 formed in the body part 311 of the rod 310. The third connecting part 323 may be inserted into a through hole 510 formed in the signal transmission part 210. At least two of the first connecting part 321, the second connecting part 322, and the third connecting part 323 may have different radii. For example, the radius of the third connecting part 323 may be the smallest, the radius of the second connecting part 322 may be the largest, and the radius of the first connecting part 321 may include a value between the radius of the third connecting part 323 and the radius of the second connecting part 322. However, the present disclosure is not necessarily limited thereto, and the connecting parts may be configured with various values according to circumstances such as purpose and use.

[0040] The signal transmission part 210 is connected to the antenna part 110 and the signal feeding part 120, and transmits a signal from the signal feeding part 120 to the antenna part 110. A through hole 510 is formed in at least a part of the signal transmission part 210, and the third connecting part 323 of the connecting member 320 of the antenna part 110 is inserted and welded to the through hole 510 for electrical connection. Thus, the signals of the measuring device, the signal of the signal feeding part 120, the signal of the signal transmission part 210, and the signal of the antenna part 110 are electrically connected. The signal transmission part 210 may be arranged perpendicular to the antenna part 110. The signal transmission part 210 may be arranged parallel to the ground E, the signal feeding part 120, the base 130, and the adhesion part 220.

[0041] A transmission line is formed in at least a part of the signal transmission part 210. The signal transmission part 210 may be implemented as a printed circuit board (PCB) type that is inexpensive and has the advantage of high-resolution printing. In addition, since the signal transmission part 210 is implemented as a PCB type, even when the signal transmission characteristics depending on the frequency are different, the signal transmission part 210 can be designed according to each signal transmission characteristic, and the signal transmission part 210 itself is configured to be non-radiating, so that an ideal monopole antenna structure can be provided. The signal transmission part 210 may be configured with a structure such as a coplanar waveguide with ground (CPWG) or a μ-strip (configured to minimize radiation loss and mismatch through a 50Ω design).

[0042] The first connection hole 520 may be along Figure 1 、Figure 2 , Figure 5 The Y-axis direction among Figure 2 , etc. is formed on one side and / or the other side of the signal feeding part 120. The second connection hole may be formed on one side and / or the other side of the base 130. The adhesion part 220 may include one or more penetrating protrusions 221. The signal transmission part 210, the base 130, and the adhesion part 220 may be aligned and arranged such that the penetrating protrusion 221 is arranged to penetrate the first connection hole 520 and the second connection hole. Thus, the ground of the measuring device, the ground of the signal transmission part 210, the ground of the signal feeding part 120, and the ground of the antenna part 110 can be electrically connected to maintain the same potential.

[0043] The signal feeding part 120 provides a signal to be fed to the antenna part 110. The signal feeding part 120 is connected to the signal transmission part 210. The signal feeding part 120 is electrically joined to the signal transmission part 210 by soldering. The signal feeding part 120 may be arranged perpendicular to the antenna part 110. The signal feeding part 120 may be horizontally arranged parallel to the ground E. The signal feeding part 120 may be configured as an SMA connector compatible with the measuring device. Considering the thickness of the signal transmission part 210, the signal feeding part 120 can be appropriately designed.

[0044] The base 130 is connected to the signal transmission part 210, the adhesion part 220, and the ground E to support the antenna part 110, the signal transmission part 210, and the signal feeding part 120. The base 130 may be arranged between the signal transmission part 210 and the ground surface E in the Z-axis direction of Figure 1 , Figure 2 and Figure 4 . The base 130 may be made of metal. As described above, the second connection hole may be formed on one side and / or the other side of the base 130 based on the Y-axis direction, and the signal transmission part 210, the base 130, and the adhesion part 220 may be arranged such that the penetrating protrusion 221 is arranged to penetrate the first connection hole 520 and the second connection hole.

[0045] The adhesion part 220 is connected to the signal transmission part 210 and the base 130 to connect the monopole antenna 100 to the ground E. One or more penetrating protrusions 221 may be formed on the adhesion part 220. As described above, the signal transmission part 210, the base 130, and the adhesion part 220 are arranged such that the penetrating protrusion 221 is arranged to penetrate the first connection hole 520 and the second connection hole, and the ground of the measuring device, the ground of the signal feeding part 120, the ground of the signal transmission part 210, and the ground of the antenna part 110 can be electrically connected to maintain the same potential. The adhesion part 220 may be made of a magnetic material to firmly adhere the monopole antenna 100 to the ground E.

[0046] The cover 140 may be configured to cover at least a portion of the antenna portion 110, at least a portion of the base 130, at least a portion of the signal feed portion 120, the signal transmission portion 210, and / or the adhesion portion 220, such that these are protected from external influences.

[0047] Figure 6A and Figure 6B are frequency - return loss diagrams for the case where the antenna portion includes a cylindrical shape with a constant radius and the case where the antenna portion includes a shape in which a plurality of cylinders with different radii are connected together.

[0048] Figure 6A is the frequency - return loss diagram for the case where the antenna portion includes a cylindrical shape with a constant radius, and Figure 6B is the frequency - return loss diagram for the case where the antenna portion includes a shape in which a plurality of cylinders with different radii are connected together.

[0049] From Figure 6A and Figure 6B it can be seen that in the case where the antenna portion includes a cylindrical shape with a constant radius, at a return loss of - 6.00 dB, the bandwidth (BW) is 21 MHz. However, in the case where the antenna portion includes a shape in which a plurality of cylinders with different radii are connected together, at a return loss of - 6.00 dB, the bandwidth has been extended to 26 MHz. Therefore, the monopole antenna 100 according to an exemplary embodiment of the present disclosure includes the effect of extending the bandwidth by forming the antenna portion 110 into a shape in which a plurality of cylinders with different radii are connected together (formed integrally, or a plurality of configurations are connected together).

[0050] According to an exemplary embodiment of the present disclosure, the monopole antenna includes the effect of providing an ideal monopole antenna structure for determining performance applicability during the antenna development stage.

[0051] According to an exemplary embodiment of the present disclosure, the monopole antenna includes the effect of providing a stable structure and extending the bandwidth of the antenna by connecting the shapes of cylinders with different radii.

[0052] According to an exemplary embodiment of the present disclosure, the monopole antenna includes the following effect: effectively transmitting signals by implementing the signal transmission portion as a printed circuit board (PCB) type in which a transmission line is formed.

[0053] This application claims the priority of Korean Patent Application No. 10 - 2023 - 0177336, filed on December 8, 2023, the entire contents of which are incorporated herein by reference for all purposes.

[0054] The various embodiments of the systems and techniques described herein can be implemented by digital electronic circuitry, integrated circuitry, field programmable gate arrays (FPGAs), application specific integrated circuits (ASICs), computer hardware, firmware, software, and / or combinations thereof. These different implementations can include implementations of one or more computer programs executable on a programmable system. The programmable system includes at least one programmable processor (which can be a dedicated processor or a general-purpose processor) coupled to a storage system, at least one input device, and at least one output device to receive data and instructions from and to the storage device. A computer program (also referred to as a program, software, software application, or code) includes instructions for a programmable processor and is stored in a "computer-readable recording medium".

[0055] A computer-readable recording medium includes all types of recording devices that store data readable by a computer system. The computer-readable recording medium can include non-volatile or non-transitory media (such as ROM, RAM, CD-ROM, magnetic tape, floppy disk, memory card, hard disk, optical disc, and storage device), and can further include transient media (such as data transmission media). In addition, the computer-readable recording medium can be distributed in networked computer systems, and the computer-readable code can be stored and executed in a distributed manner.

[0056] The different implementations of the systems and techniques described herein can be implemented by a programmable computer. Here, the computer includes a programmable processor, a data storage system (including volatile memory, non-volatile memory, or another type of storage system or a combination thereof), and at least one communication interface. For example, the programmable computer can be one of a server, a network device, a set-top box, a built-in device, a computer expansion module, a personal computer, a laptop computer, a personal digital assistant (PDA), a cloud computing system, and a mobile device.

[0057] For the sake of illustration and to accurately define the appended claims, reference is made to the locations of such features shown in the accompanying drawings, and the terms "above", "below", "inside", "outside", "upward", "downward", "up", "down", "front", "rear", "back", "inside", "outside", "inward", "outward", "inner", "outer", "inner", "outer", "forward", and "backward" are used to describe the features of the exemplary embodiments. It should be further understood that the term "connected" or its derivatives refer to both direct connection and indirect connection.

[0058] The term "and / or" can include combinations of multiple related listed items or any of the multiple related listed items. For example, "A and / or B" includes all three cases, namely "A", "B", and "A and B".

[0059] In this specification, unless otherwise stated, singular expressions include plural expressions, unless the context clearly indicates otherwise.

[0060] In an exemplary embodiment of the present invention, "at least one of A and B" may refer to "at least one of A or B" or "at least one of a combination of at least one of A and B". Further, "one or more of A and B" may refer to "one or more of A or B" or "one or more of a combination of one or more of A and B".

[0061] In an exemplary embodiment of the present disclosure, it should be understood that terms such as "including" or "having" are intended to specify the presence of the features, numbers, steps, operations, elements, components, or combinations thereof described in the specification, and do not preclude the possibility of adding or the presence of one or more other features, numbers, steps, operations, elements, components, or combinations thereof.

[0062] According to an exemplary embodiment of the present invention, components may be combined with each other to be implemented as one, or some components may be omitted.

[0063] For purposes of illustration and description, the foregoing description of specific exemplary embodiments of the present disclosure has been presented. They are not intended to be exhaustive or to limit the present disclosure to the precise forms disclosed, and obviously many modifications and variations are possible in light of the above teachings. To illustrate certain principles of the present invention and its practical applications, exemplary embodiments have been selected and described so that others skilled in the art can make and utilize the various exemplary embodiments of the present disclosure and their various alternatives and modifications. The scope of the present disclosure is intended to be defined by the appended claims and their equivalents.

Claims

1. A monopole antenna device, comprising: An antenna portion, comprising a monopole structure arranged perpendicular to the ground; a signal feeding section configured to provide a signal to be fed to the antenna section; a signal transmission part arranged in parallel with the ground and connected to the antenna part and the signal feeding part to transmit a signal to the antenna part; as well as a base, disposed between the ground and the signal transmission part to support the signal transmission part, The antenna part includes a shape in which a plurality of cylinders with different radii are connected together.

2. The monopole antenna device according to claim 1, wherein: The antenna part comprises: a rod formed to extend at a predetermined length; and A connecting member connects the rod to the signal transmission portion.

3. The monopole antenna device according to claim 2, wherein: The rod comprises: a body portion connected to the connecting member; and The extension portion is formed to extend from the main body portion.

4. The monopole antenna device according to claim 3, wherein: The radius of the main body portion is greater than the radius of the extension portion.

5. The monopole antenna device according to claim 3, wherein: A receiving groove is formed in the body portion, and at least a portion of the connecting member is inserted into the receiving groove.

6. The monopole antenna device according to claim 2, wherein: The connecting member comprises: a first connecting portion connected to the rod; a third connecting portion connected to the signal transmission portion; and The second connecting portion is connected between the first connecting portion and the third connecting portion.

7. The monopole antenna device according to claim 6, wherein: The first connection portion is inserted into a receiving groove formed in at least a portion of the rod.

8. The monopole antenna device according to claim 6, wherein: The third connection portion is inserted into a penetration hole formed in at least a portion of the signal transmission portion.

9. The monopole antenna device according to claim 6, wherein: At least two of the first connection portion, the second connection portion, and the third connection portion have different radii.

10. The monopole antenna device according to claim 9, wherein: The radius of the second connection portion is greater than the radius of the first connection portion and the radius of the third connection portion.

11. The monopole antenna device according to claim 10, wherein: Among the radii of the first connection portion, the second connection portion, and the third connection portion, the radius of the third connection portion is the smallest, and the radius of the second connection portion is the largest.

12. The monopole antenna device according to claim 2, wherein: The rod and the connecting member are connected via a threaded structure.

13. The monopole antenna device according to claim 1, wherein: The signal transmission portion is configured as a printed circuit board type, wherein a transmission line is formed in at least a portion of the signal transmission portion.

14. The monopole antenna device of claim 1, further comprising: An adhesive portion is connected to the signal transmission portion and the base to attach the monopole antenna device to the ground.

15. The monopole antenna device according to claim 14, in, The signal transmission portion includes one or more first connection holes formed in at least one of a first side and a second side of the signal transmission portion, wherein the base comprises one or more second connection holes formed in at least one of the first side and the second side of the base, wherein the adhesion portion comprises one or more penetrating protrusions, and Wherein, the signal transmission portion, the base portion, and the adhesion portion are arranged such that the one or more penetration protrusions are arranged to penetrate the one or more first connection holes and the one or more second connection holes.

16. The monopole antenna device according to claim 14, wherein: The adhesion portion is made of a magnetic substance.

17. The monopole antenna device according to claim 14, further comprising a cover covering at least a portion of the antenna portion, at least a portion of the base, at least a portion of the signal feeding portion, the signal transmission portion, and the adhesion portion.

18. The monopole antenna device according to claim 1, wherein: The signal feeding portion is arranged perpendicularly to the antenna portion and horizontally arranged parallel to the ground.

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