An adjustable multi-frequency antenna

Abstract

The utility model relates to the technical field of radiating antennas, and discloses an adjustable multi-frequency antenna, which includes a ground plate, a clearance area, an excitation structure, and a radiating structure, characterized in that the ground plate is laid on a printed circuit board; the clearance area is a side opening of the ground plate; the excitation structure is arranged in the clearance area; the radiating structure includes a radiating structure 1 and a radiating structure 2, the radiating structure 1 is arranged in the clearance area and connected to the ground plate, and is used to generate a high-frequency resonance mode; the radiating structure 2 is arranged in the clearance area and connected to the ground plate and the radiating structure 1, and is used to generate a low-frequency resonance mode; wherein the radiating structure 1 and the radiating structure 2 are both provided with components for adjusting the resonance frequency. The utility model can effectively improve the efficiency and bandwidth performance of the radiating antenna, and reduce the manufacturing cost and time of the radiating antenna.

Description

Technical Field

[0001] The utility model relates to the technical field of radiating antennas, in particular to an adjustable multi-frequency antenna. Background Art

[0002] Antennas have become an essential device in various wireless devices for transmitting and receiving electromagnetic wave signals. Multi-frequency antenna technology can greatly improve the wireless transmission rate and has been widely used in scenarios such as the fourth-generation mobile communications, the fifth-generation communication systems, and the Internet of Everything. However, at present, the frequency of existing multi-frequency antennas is fixed. Each multi-frequency antenna can only realize the transmission of the corresponding frequency signal, and cannot change the antenna's own frequency. As a result, after the corresponding multi-frequency antenna is installed, the communication equipment can only be limited to its own frequency bandwidth and cannot expand the antenna's frequency bandwidth according to actual use. Therefore, how to provide an adjustable multi-frequency antenna is a problem that needs to be solved urgently. Utility Model Content

[0003] The embodiment of the utility model provides an adjustable multi-frequency antenna to solve the above-mentioned technical problems in the prior art.

[0004] In order to have a basic understanding of some aspects of the disclosed embodiments, a brief summary is given below. This summary is not intended to be a general review, nor is it intended to identify key / important components or to delineate the scope of protection of these embodiments. Its only purpose is to present some concepts in a simple form as a preface to the detailed description that follows.

[0005] According to a first aspect of an embodiment of the utility model, an adjustable multi-frequency antenna is provided.

[0006] In one embodiment, the adjustable multi-frequency antenna includes: a ground plate, a clearance area, an excitation structure and a radiation structure, wherein the ground plate is laid on a printed circuit board; the clearance area is a side opening of the ground plate; the excitation structure is arranged in the clearance area; the radiation structure includes a radiation structure 1 and a radiation structure 2, wherein the radiation structure 1 is arranged in the clearance area and connected to the ground plate, and is used to generate a high-frequency resonance mode; the radiation structure 2 is arranged in the clearance area and connected to the ground plate and the radiation structure 1, and is used to generate a low-frequency resonance mode; wherein the radiation structure 1 and the radiation structure 2 are both provided with components for adjusting the resonance frequency.

[0007] In one embodiment, the excitation structure includes a feed and a conductor one, wherein two ends of the conductor one are respectively connected to the feed and the radiation structure one, and the feed is connected to the ground plane.

[0008] In one embodiment, the first excitation structure further includes n components for controlling the impedance matching of the antenna, where n is an integer greater than or equal to 1, and the components are connected to the middle of the first conductor.

[0009] In one embodiment, the radiation structure 1 includes a wire 2, one end of which is connected to a ground plate on a side of the clearance area, the other end of which is suspended, and the wire 2 is connected to the wire 1.

[0010] In one embodiment, the wire 2 and the left portion of the wire 1 generate a first high-frequency resonance mode, and the wire 2 and the right portion of the wire 1 generate a second high-frequency resonance mode.

[0011] In one embodiment, there are m components on the conductor 2 for adjusting the resonance frequency, where m is an integer greater than or equal to 1.

[0012] In one embodiment, when m is an integer greater than or equal to 2, the m components for adjusting the resonance frequency are respectively distributed on both sides of the connection point between the second conductor and the first conductor.

[0013] In one embodiment, the second radiation structure includes a third wire, one end of the third wire is connected to the ground plate at the bottom side of the clearance area, and the other end of the third wire is connected to the second wire.

[0014] In one embodiment, there are h components on the conductor three for adjusting the resonance frequency, where h is an integer greater than or equal to 1, and the components are connected to the middle of the conductor three.

[0015] In one embodiment, the component is a wire, an inductive element and / or a capacitive element.

[0016] The technical solution provided by the embodiment of the utility model may have the following beneficial effects:

[0017] The utility model can realize high-frequency resonance mode and low-frequency resonance mode at the same time, and can realize multi-frequency antenna without affecting the volume of the antenna. The radiation structure also has components for adjusting the resonance frequency, thereby adjusting the frequency of the high-frequency resonance mode and the low-frequency resonance mode, which can effectively improve the efficiency and bandwidth performance of the radiating antenna and reduce the manufacturing cost and time of the radiating antenna.

[0018] It should be understood that the above general description and the following detailed description are exemplary and explanatory only and are not restrictive of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The accompanying drawings herein are incorporated in and constitute a part of the specification, illustrate embodiments consistent with the present utility model, and together with the description, are used to explain the principles of the present utility model.

[0020] Figure 1 is a structural schematic diagram of an adjustable multi-frequency antenna according to an exemplary embodiment;

[0021] Figure 2 The structure of the adjustable multi-frequency antenna when the printed circuit board has two or more layers according to an exemplary embodiment is shown in FIG. Figure 1 ;

[0022] Figure 3 The structure of the adjustable multi-frequency antenna when the printed circuit board has two or more layers according to an exemplary embodiment is shown in FIG. Figure 2 ;

[0023] Figure 4 is a Smith circle diagram of an adjustable multi-frequency antenna in the frequency band range of 2 GHz-3 GHz according to an exemplary embodiment;

[0024] Figure 5 is a Smith circle diagram of an adjustable multi-frequency antenna in the frequency band range of 5 GHz-7 GHz according to an exemplary embodiment;

[0025] Figure 6 is an S parameter diagram of an adjustable multi-frequency antenna when the inductance value of component 2 changes according to an exemplary embodiment;

[0026] Figure 7 is an S parameter diagram of an adjustable multi-frequency antenna when the capacitance value of component three changes according to an exemplary embodiment;

[0027] Figure 8 1 is an S parameter diagram of an adjustable multi-frequency antenna when the inductance value of component 4 changes according to an exemplary embodiment.

[0028] In the figure:

[0029] 1. Ground plate; 2. Clearance area; 3. Power feed; 4. Wire one; 5: Component one; 6. Component two; 7. Wire two; 8. Component three; 9. Wire three; 10. Component four. DETAILED DESCRIPTION

[0030] The following description and accompanying drawings fully illustrate the specific embodiments of this article so that those skilled in the art can practice them. Parts and features of some embodiments may be included in or replace parts and features of other embodiments. The scope of the embodiments of this article includes the entire scope of the claims, as well as all available equivalents of the claims. Herein, the terms "first", "second", etc. are only used to distinguish one element from another, without requiring or implying any actual relationship or order between these elements. In fact, the first element can also be called the second element, and vice versa. Moreover, the terms "include", "comprise" or any other variant thereof are intended to cover non-exclusive inclusion, so that the structure, device or equipment including a series of elements includes not only those elements, but also other elements that are not explicitly listed, or also include elements inherent to such structure, device or equipment. In the absence of more restrictions, the elements defined by the sentence "including one..." do not exclude the existence of other identical elements in the structure, device or equipment including the elements. Each embodiment is described in a progressive manner herein, and each embodiment focuses on the differences from other embodiments, and the same and similar parts between the embodiments can be referred to each other.

[0031] The terms "longitudinal", "lateral", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like used herein to indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, are only for the convenience of describing this article and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present utility model. In the description of this article, unless otherwise specified and limited, the terms "installed", "connected" and "connected" should be understood in a broad sense, for example, it can be a mechanical connection or an electrical connection, it can also be the internal connection of two elements, it can be a direct connection, or it can be an indirect connection through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms can be understood according to the specific circumstances.

[0032] As used herein, the term "plurality" means two or more than two, unless otherwise specified.

[0033] In this document, the character " / " indicates that the preceding and following objects are in an "or" relationship. For example, A / B means: A or B.

[0034] In this article, the term "and / or" is a description of the association relationship between objects, indicating that three relationships may exist. For example, A and / or B means: A or B, or, A and B.

[0035] In the absence of conflict, the embodiments of the present invention and the features in the embodiments may be combined with each other.

[0036] Figure 1 An embodiment of the adjustable multi-frequency antenna of the utility model is shown.

[0037] In this optional embodiment, the adjustable multi-frequency antenna includes: a ground plate 1, a clearance area 2, a feed 3, a wire 1 4, a component 1 5, a component 2 6, a wire 2 7, a component 3 8, a wire 3 9 and a component 4 10. Among them,

[0038] The ground plate 1 is laid on the printed circuit board; the clearance area 2 is the side opening of the ground plate 1, the conductor 1 and the feed 2 constitute an excitation structure, the conductor 2 7 constitutes a radiation structure 1 for generating a high-frequency resonance mode; the conductor 3 9 constitutes a radiation structure 2 for generating a low-frequency resonance mode;

[0039] For the excitation structure, the two ends of the wire 1 4 are connected to the feed 3 and the wire 2 7 respectively, and the feed 3 is connected to the ground plate 1; and the wire 1 4 is also provided with a component 1 5 for controlling the impedance matching of the antenna; the component 1 5 can be a wire, an inductive element and / or a capacitive element, or any combination of a wire, an inductive element and a capacitive element. Of course, in practical applications, the component 1 does not need to be configured, and the excitation structure can be formed by only the feed 3 and the wire 1 4. The inductive element has an inductive component, which can be a lumped element, such as a chip inductor, a chip resistor, etc., or a distributed element, such as a wire, a coil, etc. The capacitive element has a capacitive component, which can be a lumped element, such as a chip capacitor, a varactor diode, a transistor, etc., or a distributed element, such as a parallel wire, a transmission line, etc. In order to obtain a specific capacitance, a combination of multiple elements can be used instead of a capacitive element.

[0040] For the radiation structure one, one end of the wire 2 7 is connected to the ground plate 1 on the side of the clearance area 2, and the other end of the wire 2 7 is suspended. The wire 2 7 is connected to the wire 1 4. In actual application, the wire 2 7 and the wire 1 4 are vertically connected, and the wire 2 7 and the ground plate 1 can also be vertically connected; in addition, the wire 2 7 and the left part of the wire 1 4 generate a first high-frequency resonance mode, and the wire 2 7 and the right part of the wire 1 4 generate a second high-frequency resonance mode.

[0041] In order to make the frequency of the high-frequency resonance mode adjustable, component 2 6 and / or component 3 8 can also be arranged on conductor 2 7, component 2 6 is located at the left part of conductor 2 7 and conductor 1 4, and is used to adjust the frequency of the first high-frequency resonance mode, and component 3 8 is located at the right part of conductor 2 7 and conductor 1 4, and is used to adjust the frequency of the second high-frequency resonance mode. Of course, in practical applications, component 3 8 does not need to be configured. Similarly, component 2 6 and / or component 3 8 can be a conductor, an inductive element and / or a capacitive element, and the inductive element has an inductive component, which can be a lumped element, such as a chip inductor, a chip resistor, etc., or a distributed element, such as a conductor, a coil, etc. The capacitive element has a capacitive component, which can be a lumped element, such as a chip capacitor, a varactor diode, a transistor, etc., or a distributed element, such as a parallel conductor, a transmission line, etc. In order to obtain a specific capacitance, a combination of multiple elements can be used instead of a capacitive element.

[0042] For the radiation structure 2, one end of the conductor 3 9 is connected to the ground plate 1 on the bottom side of the clearance area 2, and the other end of the conductor 3 9 is connected to the conductor 2 7. The conductor 3 9 is used to generate a low-frequency resonance mode. In order to adjust the frequency of the generated low-frequency resonance mode, a component 4 10 can also be set on the conductor 3 9 to adjust the frequency of the low-frequency resonance mode. Similarly, the component 4 10 can be a conductor, an inductive element and / or a capacitive element, and the inductive element has an inductive component, which can be a lumped element, such as a chip inductor, a chip resistor, etc., or a distributed element, such as a conductor, a coil, etc. The capacitive element has a capacitive component, which can be a lumped element, such as a chip capacitor, a varactor diode, a transistor, etc., or a distributed element, such as a parallel conductor, a transmission line, etc. In order to obtain a specific capacitance, a combination of multiple elements can be used instead of a capacitive element.

[0043] Figure 2 and Figure 3 An embodiment of the structure of the adjustable multi-frequency antenna when the printed circuit board of the utility model has two layers or more is respectively shown.

[0044] In actual use, when the printed circuit board is a multilayer board with two or more layers, the conductor 3 9 may also be Figure 2 The arrangement is shown in FIG. 1 , that is, one end of the wire 3 9 is connected to the wire 2 7 portion on the right side of the wire 1 4, and the other end of the wire 3 9 passes through the wire 1 4 from other layers of the printed circuit board and is connected to the ground plate 1 on the left side of the wire 1 4. Similarly, if Figure 3 As shown, when one end of the wire 3 9 is connected to the wire 2 7 on the left side of the wire 1 4, the other end of the wire 3 9 passes through the wire 1 4 from other layers of the printed circuit board and is connected to the ground plate 1 on the right side of the wire 1 4. Figure 2 and Figure 3 The solid and dashed lines shown in the figure are intended to distinguish different layers of a multi-layer printed circuit board with two or more layers.

[0045] In practical applications, the adjustable multi-frequency antenna adopts an electric field coupling structure feeding, and the electric field line density can be changed by changing the capacitance value of the components on the feeding, thereby changing the coupling coefficient of the antenna. Figure 4 and Figure 5 As shown in the Smith circle diagram, by changing the capacitance of the component 1 5, the input impedance of the antenna can be very conveniently controlled; for the first high-frequency resonance, the ring current mode 1 formed by the left part of the wire 1 and the wire 2, by changing the components configured in the ring current mode 1, the frequency of the first high-frequency resonance can be changed, such as Figure 6 As shown in the return loss, by changing the inductance of the component 2 6, the first high-frequency resonance frequency of the antenna can be very conveniently controlled; for the second high-frequency resonance, the ring current mode 2 formed by the right part of the conductor 1 and the conductor 2, by changing the components configured in the ring current mode 2, the frequency of the second high-frequency resonance can be changed, such as Figure 7 As shown in the return loss, by changing the capacitance of the component 3 8, the second high-frequency resonance frequency of the antenna can be very conveniently controlled; for the low-frequency resonance, the ring current mode 3 formed by the conductor 1 and the conductor 3, by changing the components configured in the ring current mode 3, the frequency of the low-frequency resonance can be changed, such as Figure 8 As shown in the return loss, by changing the inductance of the component 10, the low-frequency resonance frequency of the antenna can be very conveniently controlled; it shows the various important indicators of the antenna, which makes debugging in actual products more convenient and improves the design efficiency of the antenna.

[0046] The present invention is not limited to the structures described above and shown in the drawings, and various modifications and changes can be made without departing from the scope thereof. The scope of the present invention is limited only by the appended claims.

Claims

1. An adjustable multi-frequency antenna, comprising a ground plane, a clearance area, an excitation structure and a radiation structure, characterized in that: The ground plate is laid on a printed circuit board; the clearance area is a side opening of the ground plate; the excitation structure is arranged in the clearance area; the radiation structure includes a radiation structure 1 and a radiation structure 2, the radiation structure 1 is arranged in the clearance area and connected to the ground plate, for generating a high-frequency resonance mode; the radiation structure 2 is arranged in the clearance area and connected to the ground plate and the radiation structure 1, for generating a low-frequency resonance mode; wherein, the radiation structure 1 and the radiation structure 2 are both provided with components for adjusting the resonance frequency.

2. The adjustable multi-frequency antenna according to claim 1, characterized in that: The excitation structure includes a feed and a conductor one, wherein two ends of the conductor one are respectively connected to the feed and the radiation structure one, and the feed is connected to the ground plate.

3. The adjustable multi-frequency antenna according to claim 2, characterized in that: The first excitation structure also includes n components for controlling the impedance matching of the antenna, where n is an integer greater than or equal to 1, and the components are connected to the middle of the first conductor.

4. The adjustable multi-frequency antenna according to claim 3, characterized in that: The radiation structure 1 includes a wire 2, one end of which is connected to the ground plate on the side of the clearance area, the other end of which is suspended, and the wire 2 is connected to the wire 1.

5. The adjustable multi-frequency antenna according to claim 4, characterized in that: The second conductor and the left side portion of the first conductor generate a first high-frequency resonance mode, and the second conductor and the right side portion of the first conductor generate a second high-frequency resonance mode.

6. The adjustable multi-frequency antenna according to claim 5, characterized in that: The number of components on the second conductor for adjusting the resonance frequency is m, where m is an integer greater than or equal to 1.

7. The adjustable multi-frequency antenna according to claim 6, characterized in that: When m is an integer greater than or equal to 2, the m components for adjusting the resonance frequency are respectively distributed on both sides of the connection point between the second conductor and the first conductor.

8. The adjustable multi-frequency antenna according to claim 7, characterized in that: The second radiation structure includes a third wire, one end of which is connected to the ground plate at the bottom side of the clearance area, and the other end of which is connected to the second wire.

9. The adjustable multi-frequency antenna according to claim 8, characterized in that: The number of components on the conductor three for adjusting the resonance frequency is h, where h is an integer greater than or equal to 1, and the components are connected to the middle of the conductor three.

10. The adjustable multi-frequency antenna according to any one of claims 1 to 9, characterized in that: The components are wires, inductive elements and / or capacitive elements.

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