Metal surface-wave resonator

Abstract

A metal surface-wave resonator is disclosed. The metal surface-wave resonator comprises: a first layer formed by attaching a radiator to a first dielectric patch; a second layer patterned by arranging a plurality of first slots on a second dielectric patch; and a third layer patterned by arranging a plurality of second slots on a third dielectric patch.

Description

Metal surface wave resonator

[0001] The present invention relates to a metal surface wave resonator.

[0002]

[0003] Surface wave communication, which can overcome the shortcomings of wireless communication using air as a medium, can enable smooth signal transmission between metal structures by using the metal surface as a medium.

[0004] Figure 1 is a drawing illustrating the concept of surface wave communication.

[0005] Referring to Figure 1, a metal surface wave is a component generated at the interface between air and metal, and is a phenomenon in which waves are transmitted in the direction of the dielectric of the metal surface. A metal surface wave resonator, used in surface wave communication, which transmits signals through the metal surface, is a key component that can convert electromagnetic wave RF signals into magnetic field signals and transmit them to the metal surface.

[0006] Metal surface wave resonators designed to date can control their operating frequency and selectivity by modifying the shape and laminated structure of the metal they are attached to. However, the narrow operating bandwidth of the resonator due to the design technique prevents it from covering operating frequencies above 100 MHz. Surface wave communication, which does not use a separate modulation method, naturally relies on existing modulation methods or communication protocols. The 5 GHz band of the ISM Band is approximately 600 MHz, making it difficult for currently manufactured resonators to utilize the entire channel (band).

[0007] Meanwhile, due to the characteristics of the Wi-Fi channel bandwidth, the 5GHz band can secure a higher transmission speed than the 2.4GHz band, and this can be equally applied to surface wave communication.

[0008] Therefore, a technology is required to increase the bandwidth of a metal surface wave resonator so that the 5 GHz band can be used efficiently.

[0009]

[0010] The present invention provides a metal surface wave resonator with increased bandwidth.

[0011]

[0012] According to one aspect of the present invention, a metal surface wave resonator is disclosed.

[0013] A metal surface wave resonator according to an embodiment of the present invention includes a first layer formed by attaching a radiator to a first dielectric patch, a second layer patterned with a plurality of first slots arranged on a second dielectric patch, and a third layer patterned with a plurality of second slots arranged on a third dielectric patch.

[0014] The above metal surface wave resonator further includes a fourth layer patterned with a plurality of third slots arranged on the fourth dielectric patch.

[0015] The first slot, the second slot, and the third slot are formed in a pattern in which a plurality of rings having different radii and one side of which is open at a preset interval are arranged to form concentric circles on the same plane, and adjacent rings are connected to each other.

[0016] The total length of the plurality of rings constituting the first slot is λ, which is the operating wavelength of the metal surface wave resonator.

[0017] The total length of the plurality of rings constituting the second slot is half of the operating wavelength λ of the metal surface wave resonator.

[0018] The total length of the plurality of rings constituting the third slot is 1 / 4 of the operating wavelength λ of the metal surface wave resonator.

[0019] The inductive characteristics are determined according to the length, thickness, and spacing between the plurality of rings constituting the first slot, the second slot, and the third slot.

[0020] In the first layer, an indirect power supply radiator having a preset thickness is inserted between the dielectric patch and the radiator.

[0021]

[0022] A metal surface wave resonator according to an embodiment of the present invention can enable wideband surface wave communication by increasing bandwidth.

[0023]

[0024] Figure 1 is a drawing illustrating the concept of surface wave communication.

[0025] Figure 2 is a drawing illustrating the general appearance of a metal surface wave resonator.

[0026] Figure 3 is a diagram showing a simulation of surface wave communication of a metal surface wave resonator.

[0027] Fig. 4 is a diagram showing the simulation results for surface wave communication of a metal surface wave resonator.

[0028] FIG. 5 is a drawing schematically illustrating a slot applied to a metal surface wave resonator according to an embodiment of the present invention.

[0029] Figure 6 is a drawing schematically illustrating an existing slot.

[0030] FIG. 7 is a diagram showing simulation results for the gains of a slot according to an embodiment of the present invention and an existing slot.

[0031] FIG. 8 is a drawing schematically illustrating various structures of slots applied to a metal surface wave resonator according to an embodiment of the present invention.

[0032] Figure 9 is a diagram showing the simulation results for each slot of Figure 8.

[0033] Fig. 10 is a drawing schematically illustrating the configuration of a metal surface wave resonator according to an embodiment of the present invention.

[0034] FIG. 11 is a diagram showing the simulation results of a metal surface wave resonator according to the embodiment of the present invention of FIG. 10.

[0035] FIG. 12 is a drawing schematically illustrating the configuration of a metal surface wave resonator according to another embodiment of the present invention.

[0036] FIG. 13 is a diagram showing the simulation results of a metal surface wave resonator according to another embodiment of the present invention of FIG. 12.

[0037]

[0038] As used herein, singular expressions include plural expressions unless the context clearly dictates otherwise. In this specification, terms such as "consist of" or "include" should not be construed to necessarily include all components or steps described in the specification, and should be construed to mean that some of the components or steps may not be included, or that additional components or steps may be included. In addition, terms such as "part" and "module" described in the specification mean a unit that processes at least one function or operation, which may be implemented by hardware or software, or by a combination of hardware and software.

[0039]

[0040] Hereinafter, various embodiments of the present invention will be described in detail with reference to the attached drawings.

[0041] Fig. 2 is a drawing illustrating a general appearance of a metal surface wave resonator, Fig. 3 is a drawing illustrating a simulation of surface wave communication of a metal surface wave resonator, and Fig. 4 is a drawing illustrating a simulation result of surface wave communication of a metal surface wave resonator.

[0042] Referring to Figure 2, a metal surface wave resonator is a device that converts a wireless communication signal into a surface wave so that the wireless communication signal can be applied to a metal surface. That is, an RF signal applied from the outside generates an electromagnetic field through a radiator, and periodically arranged slots capture the magnetism that can transmit the signal to the metal surface.

[0043] A metal surface wave resonator is composed of a dielectric to derive a surface wave phenomenon that occurs between a metal and a dielectric, and the size of the dielectric, the pattern of the surface wave, the radiator, etc. can be determined to transmit a signal of a desired frequency.

[0044] The simulation illustrated in Fig. 3 demonstrates a phenomenon in which a signal is transmitted to a metal surface when an RF signal is applied to a metal surface wave resonator. As illustrated in Fig. 3, it can be confirmed that the RF signal input to the metal surface wave resonator is transmitted horizontally along the metal surface. The signal is transmitted along the metal surface as an H field is formed, which can be confirmed by the coordinates measured in the simulation. In addition, as illustrated in Fig. 4, it can be confirmed that the signal propagates along the metal surface.

[0045]

[0046] FIG. 5 is a diagram schematically illustrating a slot applied to a metal surface wave resonator according to an embodiment of the present invention, FIG. 6 is a diagram schematically illustrating an existing slot, FIG. 7 is a diagram illustrating simulation results for gains of a slot according to an embodiment of the present invention and an existing slot, FIG. 8 is a diagram schematically illustrating various structures of a slot applied to a metal surface wave resonator according to an embodiment of the present invention, FIG. 9 is a diagram illustrating simulation results for each slot of FIG. 8, FIG. 10 is a diagram schematically illustrating a configuration of a metal surface wave resonator according to an embodiment of the present invention, FIG. 11 is a diagram schematically illustrating a simulation result of a metal surface wave resonator according to an embodiment of the present invention of FIG. 10, FIG. 12 is a diagram schematically illustrating a configuration of a metal surface wave resonator according to another embodiment of the present invention, and FIG. 13 is a diagram schematically illustrating a simulation result of a metal surface wave resonator according to another embodiment of the present invention of FIG. 12. Hereinafter, a metal surface wave resonator according to an embodiment of the present invention will be described with reference to FIGS. 5 to 13.

[0047] Referring to FIG. 5, a slot applied to a metal surface wave resonator according to an embodiment of the present invention may be formed in a pattern in which a plurality of rings having different radii and one side of which is open at a preset interval are arranged to form concentric circles on the same plane, and adjacent rings are connected to each other.

[0048] That is, the pattern of slots applied to the metal surface wave resonator according to the embodiment of the present invention has a meander structure, and the thickness (W) of each ring and the gap (G) between the rings can be set to have a structure in which a magnetic field is trapped. Here, the total length of the plurality of rings constituting the slot can be determined by the wavelength (λ) at which the metal surface wave resonator operates.

[0049] The metal surface wave resonator according to an embodiment of the present invention can have capacitive characteristics determined according to the laminated structure of the radiator and the slots, and inductive characteristics can be determined according to the length of the periodically arranged slots, the thickness (W) of the rings, and the gap (G) between the rings.

[0050] Referring to FIG. 7, when comparing the gain of the slot applied to the metal surface wave resonator according to the embodiment of the present invention with the existing slot as in FIG. 6, it can be seen that the slot applied to the metal surface wave resonator according to the embodiment of the present invention can operate at a wider resonant frequency and obtain a higher gain compared to the existing slot.

[0051] Fig. 8 shows slots when the total lengths of the plurality of rings constituting the slots applied to the metal surface wave resonator are λ, λ / 2, and λ / 4. The number of rings constituting each slot illustrated in Fig. 8 can be adjusted according to the total lengths of the plurality of rings set. As illustrated in Fig. 9, the design of a desired resonant frequency is possible by changing the total lengths of the plurality of rings constituting the slots applied to the metal surface wave resonator from λ to λ / 2, λ / 4, etc. Through this, a metal surface wave resonator optimized for an operating frequency can be designed according to a communication method used in the ISM Band.

[0052] Referring to FIG. 10, a metal surface wave resonator according to an embodiment of the present invention may be formed by sequentially stacking a first layer formed by attaching a radiator (11) to a first dielectric patch (10), a second layer patterned by arranging a plurality of slots (21) having a total length of λ of a plurality of rings on a second dielectric patch (20), a third layer patterned by arranging a plurality of slots (31) having a total length of λ / 2 of a plurality of rings on a third dielectric patch (30), and a fourth layer patterned by arranging a plurality of slots (41) having a total length of λ / 4 of a plurality of rings on a fourth dielectric patch (40).

[0053] The operating frequency of a metal surface wave resonator of this type can be determined depending on the size of the dielectric patch (10, 20, 30, 40), the number of slots (21, 31, 41), and the arrangement form.

[0054] As such, the metal surface wave resonator composed of four layers is only one embodiment, and the number of layers may be reduced or increased depending on the implementation.

[0055] That is, according to another embodiment, the metal surface wave resonator may be formed of only the first layer, the second layer, and the third layer, excluding the fourth layer.

[0056] The ISM Band of the 2 GHz band has a bandwidth of about 100 MHz, and the existing metal surface wave resonator has a small transmission and reception deviation between each channel. However, the 5 GHz band is about 700 MHz band from 5.15 GHz to 5.85 GHz, and in order to cover all of this, it is necessary to increase the bandwidth of the metal surface wave resonator. Therefore, the metal surface wave resonator according to an embodiment of the present invention is designed with a laminated structure in order to design the periodically arranged slots to match the desired frequency. That is, the metal surface wave resonator according to an embodiment of the present invention is formed with a three-layer laminated structure composed of a plurality of slots of λ, λ / 2, and λ / 4, respectively, centered from 5.1 to 5.8 GHz to 5.5 GHz.

[0057] Referring to FIG. 11, it can be confirmed that the metal surface wave resonator according to the embodiment of the present invention, which is formed with a three-layer laminated structure composed of a plurality of slots of λ, λ / 2, and λ / 4, has an expanded bandwidth compared to the existing resonator, as shown in the table below.

[0058]

[0059] The simulation results using this combination were confirmed, and although the bandwidth was expanded, the bandwidth is still narrow to cover the entire 5 GHz band. Therefore, an indirect feeding method, which is one of the wideband techniques of wireless antennas, is applied to the metal surface wave resonator according to the embodiment of the present invention.

[0060] Referring to FIG. 12, in a first layer formed by attaching a radiator (11) to a first dielectric patch (10) of a metal surface wave resonator according to an embodiment of the present invention, an indirect power supply radiator (12) in the form of a slit having a preset thickness (d) is inserted between the dielectric patch (10) and the radiator (11), so that the gap between the dielectric patch (10) and the radiator (11) can be adjusted. Through this, the bandwidth of the metal surface wave resonator according to an embodiment of the present invention can be increased.

[0061] Referring to FIG. 13, it can be confirmed that the bandwidth of the metal surface wave resonator according to the embodiment of the present invention to which the indirect power supply radiator (12) is applied is expanded as the gap between the dielectric patch (10) and the radiator (11) increases due to the indirect power supply radiator (12), as shown in the table below.

[0062]

[0063]

[0064] The above-described embodiments of the present invention are disclosed for the purpose of illustration, and those skilled in the art with common knowledge of the present invention will be able to make various modifications, changes, and additions within the spirit and scope of the present invention, and such modifications, changes, and additions should be considered to fall within the scope of the following patent claims.

Claims

1. In a metal surface wave resonator, A first layer formed by attaching a radiator to a first dielectric patch; A second layer patterned with a plurality of first slots arranged on the second genetic patch; and A metal surface wave resonator comprising a third layer patterned with a plurality of second slots arranged on a third dielectric patch.

2. In paragraph 1, The above metal surface wave resonator is, A metal surface wave resonator further comprising a fourth layer patterned with a plurality of third slots arranged on the fourth dielectric patch.

3. In paragraph 2, The first slot, the second slot and the third slot are, A metal surface wave resonator characterized in that a plurality of rings having different radii and open at preset intervals on one side are arranged concentrically on the same plane, and adjacent rings are formed in a pattern connected to each other.

4. In paragraph 3, A metal surface wave resonator, characterized in that the total length of the plurality of rings constituting the first slot is λ, which is the operating wavelength of the metal surface wave resonator.

5. In paragraph 3, A metal surface wave resonator, characterized in that the total length of the plurality of rings constituting the second slot is half of the operating wavelength λ of the metal surface wave resonator.

6. In paragraph 3, A metal surface wave resonator, characterized in that the total length of the plurality of rings constituting the third slot is 1 / 4 of the operating wavelength λ of the metal surface wave resonator.

7. In paragraph 3, A metal surface wave resonator characterized in that the inductive characteristics are determined according to the length, thickness, and spacing between the plurality of rings constituting the first slot, the second slot, and the third slot.

8. In paragraph 1, A metal surface wave resonator characterized in that, in the first layer, an indirect power supply radiator having a preset thickness is inserted between the dielectric patch and the radiator.

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