Dual radiator antenna and electronic device

Abstract

The present invention belongs to the field of antenna technology in wireless communication transmission, and discloses a dual radiator antenna, comprising: a first radiator, a second radiator and a coplanar waveguide, wherein the first radiator and the second radiator are connected by the coplanar waveguide, and the first radiator, the second radiator and the coplanar waveguide are all laid on a printed circuit board; wherein the first radiator comprises a first vibrator, a second vibrator and a third vibrator, and the second radiator comprises a fourth vibrator, a fifth vibrator and a sixth vibrator; the coplanar waveguide comprises a first ground wire, a second ground wire and a signal wire, wherein the first ground wire and the second ground wire are respectively located on both sides of the signal wire, and gaps are respectively provided between the first ground wire and the second ground wire and the signal wire; one end of the signal wire is connected to a feed circuit, and the other end is connected to the sixth vibrator in the second radiator; the two ends of the feed circuit are respectively connected to the signal wire and the third vibrator in the first radiator. The antenna of the present invention can achieve high gain and omnidirectional radiation.

Description

Technical Field

[0001] The present invention relates to the technical field of antennas in wireless communication transmission, and in particular to a dual-radiator antenna with high gain and omnidirectional radiation characteristics. Background Art

[0002] Antennas have become an essential device in various wireless devices, used to transmit and receive electromagnetic wave signals to achieve the purpose of communication. Dipole antennas are by far the simplest, best performing, and most widely used type of antennas. Traditional dipole antennas consist of a pair of symmetrically placed conductors (diopoles), with the two ends of the diopole close to each other connected to the feed circuit. Common dipole antennas consist of two coaxial straight wires, which can be evolved into more complex shapes (cage antennas, bat wing antennas, etc.) according to actual needs.

[0003] Figure 1 A schematic diagram of the structure of a traditional dipole antenna is shown. The feeding circuit 103 is located between the first vibrator 101 and the second vibrator 102, and is used to connect the two vibrators. In theory, the length of the first vibrator 101 is equal to the length of the second vibrator 102, generating a resonant frequency and omnidirectional radiation. The most common dipole antenna is a half-wave antenna, that is, the length of the two vibrators is about one-quarter of the wavelength. Although the traditional dipole antenna has the characteristics of omnidirectional radiation, the gain is low and the distance of transmitting and receiving signals is limited.

[0004] With the promotion and application of the Internet of Things and the fifth-generation communication system, new antenna technologies need to have the characteristics of wide coverage and fast communication speed, thus putting forward the demand for high-gain and omnidirectional radiation antenna technology. High-gain antennas improve the directivity of the antenna, making the signal propagation distance farther, and the penetration and anti-interference capabilities stronger. However, traditional high-gain antennas (such as patch antennas and horn antennas) increase the gain by sacrificing the omnidirectional characteristics of the antenna, so they are almost only effective in the front, with narrow beams and small coverage, and therefore cannot meet the requirements of various wireless terminal products, especially WiFi6 products. Therefore, it is necessary to propose an antenna with both high gain and omnidirectional radiation characteristics to meet the growing needs of terminal products and improve communication rates. Summary of the invention

[0005] The embodiments of the present invention provide a dual radiator antenna to solve the problem of low gain of dipole antennas in the prior art and limited distance of transmitting and receiving signals. In order to have a basic understanding of some aspects of the disclosed embodiments, a simple summary is given below. This summary is not a general review, nor is it intended to identify key / important components or to describe 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.

[0006] According to a first aspect of an embodiment of the present invention, a dual radiator antenna is provided.

[0007] In some optional embodiments, a dual radiator antenna comprises:

[0008] A first radiator, a second radiator and a coplanar waveguide, the first radiator and the second radiator are connected by the coplanar waveguide, and the first radiator, the second radiator and the coplanar waveguide are all laid on a printed circuit board; wherein,

[0009] The first radiator includes a first vibrator 211, a second vibrator 212 and a third vibrator 213, and the second radiator includes a fourth vibrator 221, a fifth vibrator 222 and a sixth vibrator 223;

[0010] The coplanar waveguide includes a first ground line 201a, a second ground line 201b and a signal line 202. The first ground line 201a and the second ground line 201b are respectively located on both sides of the signal line 202. Gaps are respectively provided between the first ground line 201a and the second ground line 201b and the signal line 202.

[0011] One end of the first ground wire 201a is connected to the first oscillator 211 in the first radiator, and the other end is connected to the fourth oscillator 221 in the second radiator; one end of the second ground wire 201b is connected to the second oscillator 212 in the first radiator, and the other end is connected to the fifth oscillator 222 in the second radiator;

[0012] One end of the signal line 202 is connected to the feeding circuit 200, and the other end is connected to the sixth oscillator 223 in the second radiator;

[0013] One end of the feeding circuit 200 is connected to the signal line 202, and the other end is connected to the third oscillator 213 in the first radiator.

[0014] Optionally, the resonance frequency of the first radiator is adjusted by adjusting any one or more of the length of the first vibrator 211 , the length of the second vibrator 212 , and the length of the third vibrator 213 .

[0015] Optionally, the resonance frequency of the second radiator is adjusted by adjusting any one or more of the length of the fourth vibrator 221 , the length of the fifth vibrator 222 , and the length of the sixth vibrator 223 .

[0016] Optionally, the characteristic impedance of the coplanar waveguide is adjusted by adjusting any one or any multiple of the width of the signal line 202 , the distance between the first ground line 201 a and the signal line 202 , and the distance between the second ground line 201 b and the signal line 202 .

[0017] Optionally, in the coplanar waveguide, the current distribution of the first ground line 201a and the second ground line 201b is the same, and both are opposite to the current direction of the signal line 202; the coplanar waveguide operates at N wavelengths, N is a positive integer, so that the current distribution direction of the first radiator is consistent with the current distribution direction of the second radiator.

[0018] Optionally, the dual radiator antenna further includes a capacitive element or an inductive element or a combination of a capacitive element and an inductive element.

[0019] Optionally, the coplanar waveguide has a bent portion.

[0020] Optionally, the first vibrator 211 and the second vibrator 212 are both L-shaped; the third vibrator 213 is inverted U-shaped; the fourth vibrator 221 and the fifth vibrator 222 are both inverted L-shaped; and the sixth vibrator 223 is U-shaped.

[0021] Optionally, the lateral terminal of the first vibrator 211 is connected to the lateral terminal of the fourth vibrator 221 through the first ground wire 201a, and the lateral terminal of the second vibrator 212 is connected to the lateral terminal of the fifth vibrator 222 through the second ground wire 201b; one end of the signal line 202 is connected to the feeding circuit 200, and the other end is connected to the lateral side of the sixth vibrator 223; one end of the feeding circuit 200 is connected to the signal line 202, and the other end is connected to the lateral side of the third vibrator 213.

[0022] According to a second aspect of an embodiment of the present invention, an electronic device is provided.

[0023] In some optional embodiments, the electronic device includes the dual radiator antenna described in any of the above optional embodiments.

[0024] The technical solution provided by the embodiment of the present invention may have the following beneficial effects:

[0025] (1) It can achieve the characteristics of high gain and omnidirectional radiation, and has the advantages of wide signal coverage, fast communication rate, and long transmission distance, and has broader application prospects.

[0026] (2) Using coplanar waveguide (CPW) to connect two radiators can be achieved through circuit board printing technology, which is conducive to reducing manufacturing costs, simplifying manufacturing processes, shortening manufacturing cycles, and improving product yields.

[0027] It is to be understood that the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the invention and, together with the description, serve to explain the principles of the invention.

[0029] Figure 1 It is a schematic diagram of the structure of a traditional dipole antenna;

[0030] Figure 2a is a schematic structural diagram of a dual radiator antenna according to an exemplary embodiment;

[0031] Figure 2b is a schematic diagram of current distribution generated by a dual radiator antenna according to an exemplary embodiment;

[0032] Figure 3a is a schematic structural diagram of a dual radiator antenna according to an exemplary embodiment;

[0033] Figure 3b is a schematic structural diagram of a dual radiator antenna according to an exemplary embodiment;

[0034] Figure 3c is a schematic structural diagram of a dual radiator antenna according to an exemplary embodiment;

[0035] Figure 3d is a schematic structural diagram of a dual radiator antenna according to an exemplary embodiment;

[0036] Figure 3e is a schematic structural diagram of a dual radiator antenna according to an exemplary embodiment;

[0037] Figure 3f is a schematic structural diagram of a dual radiator antenna according to an exemplary embodiment;

[0038] Figure 3g is a schematic structural diagram of a dual radiator antenna according to an exemplary embodiment;

[0039] Figure 3h is a schematic structural diagram of a dual radiator antenna according to an exemplary embodiment;

[0040] Figure 3i is a schematic structural diagram of a dual radiator antenna according to an exemplary embodiment;

[0041] Figure 3jis a schematic structural diagram of a dual radiator antenna according to an exemplary embodiment;

[0042] Figure 3k is a schematic structural diagram of a dual radiator antenna according to an exemplary embodiment;

[0043] Figure 3l is a schematic structural diagram of a dual radiator antenna according to an exemplary embodiment;

[0044] Figure 3m is a schematic structural diagram of a dual radiator antenna according to an exemplary embodiment;

[0045] Figure 4 is a schematic structural diagram of a dual radiator antenna according to an exemplary embodiment;

[0046] Figure 5 is an S-parameter diagram of a dual-radiator antenna according to an exemplary embodiment;

[0047] Figure 6 is a radiation diagram of a dual radiator antenna according to an exemplary embodiment;

[0048] Reference numerals:

[0049] 211, first vibrator; 212, second vibrator; 213, third vibrator; 221, fourth vibrator; 222, fifth vibrator; 223, sixth vibrator; 201a, first ground line; 201b, second ground line; 202, signal line; 200, feeding circuit. DETAILED DESCRIPTION

[0050] 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.

[0051] The terms "longitudinal", "lateral", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc. in this document indicate the orientation or position relationship based on the orientation or position relationship shown in the drawings, and are only for the convenience of describing this document 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 operate in a specific orientation, and therefore cannot be understood as a limitation on the present invention. In the description of this document, 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 communication 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 specific circumstances.

[0052] As used herein, the term "plurality" means two or more than two, unless otherwise specified.

[0053] 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.

[0054] 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.

[0055] An embodiment of the present invention provides a dual radiator antenna, comprising: a first radiator, a second radiator and a coplanar waveguide, wherein the first radiator and the second radiator are connected by the coplanar waveguide, and the first radiator, the second radiator and the coplanar waveguide are all laid on a printed circuit board.

[0056] Figure 2a An alternative embodiment of the dual radiator antenna of the present invention is shown.

[0057] like Figure 2a As shown, in this optional embodiment, the dual radiator antenna includes a first radiator, a second radiator and a coplanar waveguide (CPW).

[0058] The first radiator includes a first oscillator 211, a second oscillator 212 and a third oscillator 213, which are used to radiate signals. The second radiator includes a fourth oscillator 221, a fifth oscillator 222 and a sixth oscillator 223, which are used to radiate signals.

[0059] The coplanar waveguide (CPW) includes a first ground line 201a, a second ground line 201b and a signal line 202. The first ground line 201a and the second ground line 201b of the coplanar waveguide (CPW) are respectively located on both sides of the signal line 202; gaps are provided between the first ground line 201a and the second ground line 201b and the signal line 202, and the spacing is very small, and the spacing is usually much smaller than one wavelength, preferably, the spacing is less than 0.02 wavelength. One end of the first ground line 201a is connected to the first oscillator 211 in the first radiator, and the other end is connected to the fourth oscillator 221 in the second radiator. One end of the second ground line 201b is connected to the second oscillator 212 in the first radiator, and the other end is connected to the fifth oscillator 222 in the second radiator. One end of the signal line 202 is connected to the feed circuit 200, and the other end is connected to the sixth oscillator 223 in the second radiator. One end of the feeding circuit 200 is connected to the signal line 202, and the other end is connected to the third oscillator 213 in the first radiator, so as to feed the RF signal. The coplanar waveguide (CPW) is a transmission line with a planar structure, which is used to transmit signals and evenly distribute energy to the first radiator and the second radiator, thereby achieving the effect of signal superposition, enhancing the directivity while maintaining the omnidirectional radiation characteristics.

[0060] In the above optional embodiment, each component of the dual radiator antenna (i.e., the first dipole 211, the second dipole 212, the third dipole 213, the fourth dipole 221, the fifth dipole 222, the sixth dipole 223, the first ground wire 201a, the second ground wire 201b, the signal line 202 and the feeding circuit 200) are all laid on a printed circuit board (PCB).

[0061] Optionally, the resonant frequency of the first radiator is adjusted by adjusting any one or any multiple of the length of the first vibrator 211, the length of the second vibrator 212, and the length of the third vibrator 213. The length of the first vibrator 211, the length of the second vibrator 212, and the length of the third vibrator 213 jointly determine the resonant frequency of the first radiator, and the resonant frequency of the first radiator is adjusted by adjusting any one of the length of the first vibrator 211, the length of the second vibrator 212, and the length of the third vibrator 213, for example, the resonant frequency of the first radiator can be adjusted by adjusting only the length of the third vibrator 213; or, the resonant frequency of the first radiator is adjusted by adjusting any two of the length of the first vibrator 211, the length of the second vibrator 212, and the length of the third vibrator 213, for example, the resonant frequency of the first radiator is adjusted by adjusting the length of the first vibrator 211 and the length of the second vibrator 212; or, the resonant frequency of the first radiator is adjusted by adjusting the length of the first vibrator 211, the length of the second vibrator 212, and the length of the third vibrator 213.

[0062] Optionally, the resonant frequency of the second radiator is adjusted by adjusting any one or any multiple of the length of the fourth vibrator 221, the length of the fifth vibrator 222, and the length of the sixth vibrator 223. The length of the fourth vibrator 221, the length of the fifth vibrator 222, and the length of the sixth vibrator 223 jointly determine the resonant frequency of the second radiator, and the resonant frequency of the second radiator is adjusted by adjusting any one of the length of the fourth vibrator 221, the length of the fifth vibrator 222, and the length of the sixth vibrator 223, for example, the resonant frequency of the second radiator can be adjusted by adjusting only the length of the sixth vibrator 223; or, the resonant frequency of the second radiator is adjusted by adjusting any two of the length of the fourth vibrator 221, the length of the fifth vibrator 222, and the length of the sixth vibrator 223, for example, the resonant frequency of the second radiator is adjusted by adjusting the length of the fourth vibrator 221 and the length of the fifth vibrator 222; or, the resonant frequency of the second radiator is adjusted by adjusting the length of the fourth vibrator 221, the length of the fifth vibrator 222, and the length of the sixth vibrator 223.

[0063] Optionally, the characteristic impedance of the coplanar waveguide (CPW) is adjusted by adjusting any one or more of the width of the signal line 202, the spacing between the first ground line 201a and the signal line 202, and the spacing between the second ground line 201b and the signal line 202, thereby optimizing the antenna performance.

[0064] Optionally, the first ground line 201 a and the second ground line 201 b are respectively located on two sides of the signal line 202 and are symmetrically arranged.

[0065] Optionally, the first vibrator 211 and the second vibrator 212 are both L-shaped. Optionally, the first vibrator 211 and the second vibrator 212 are symmetrically arranged on both sides of the signal line 202. Optionally, the first vibrator 211 and the second vibrator 212 are both L-shaped and mirror-symmetrical with the signal line 202. Optionally, the third vibrator 213 is inverted U-shaped. Of course, according to the teachings of the present invention and according to specific design requirements, the shapes of the first vibrator 211, the second vibrator 212, the third vibrator 213 and the structure of the first radiator can also adopt other deformations.

[0066] Optionally, the fourth vibrator 221 and the fifth vibrator 222 are both in an inverted L shape. Optionally, the fourth vibrator 221 and the fifth vibrator 222 are symmetrically arranged on both sides of the signal line 202. Optionally, the fourth vibrator 221 and the fifth vibrator 222 are both in an inverted L shape and are mirror-symmetrical with the signal line 202. Optionally, the sixth vibrator 223 is U-shaped. Of course, according to the teachings of the present invention and according to specific design requirements, the shapes of the fourth vibrator 221, the fifth vibrator 222, and the sixth vibrator 223 and the structure of the second radiator can also adopt other variations.

[0067] Figure 2a In the illustrated embodiment, all structures of the antenna are located in the same plane. The first oscillator 211 and the second oscillator 212 are both L-shaped and mirror-symmetrical with respect to the signal line 202. The horizontal side of the first oscillator 211 and the horizontal side of the second oscillator 212 are arranged on the inner side, and the vertical side of the first oscillator 211 and the vertical side of the second oscillator 212 are arranged on the outer side. The inner side and the outer side are relative to the distance from the signal line 202. The horizontal side of the L-shaped structure is closer to the signal line 202 and is located on the inner side, while the vertical side of the L-shaped structure is farther away from the signal line 202 and is located on the outer side. The third oscillator 213 is inverted U-shaped and is located Figure 2a The fourth vibrator 221 and the fifth vibrator 222 are both inverted L-shaped and mirror-symmetrical with the signal line 202. The horizontal sides of the fourth vibrator 221 and the horizontal sides of the fifth vibrator 222 are arranged on the inner side, and the vertical sides of the fourth vibrator 221 and the vertical sides of the fifth vibrator 222 are arranged on the outer side. The inner side and the outer side are relative to the distance from the signal line 202. The horizontal side of the L-shaped structure is closer to the signal line 202 and is located on the inner side, and the vertical side of the L-shaped structure is farther away from the signal line 202 and is located on the outer side. The sixth vibrator 223 is U-shaped and is located Figure 2aThe fourth oscillator 221 and the fifth oscillator 222 are shown in the plan view. The horizontal terminal of the first oscillator 211 is connected to the horizontal terminal of the fourth oscillator 221 through the first ground line 201a, and the horizontal terminal of the second oscillator 212 is connected to the horizontal terminal of the fifth oscillator 222 through the second ground line 201b. One end of the signal line 202 is connected to the feed circuit 200, and the other end is connected to the horizontal side of the sixth oscillator 223. One end of the feed circuit 200 is connected to the signal line 202, and the other end is connected to the horizontal side of the third oscillator 213.

[0068] certainly, Figure 2a The antenna structure of the embodiment shown is only for illustration. According to the teaching of the present invention and specific design requirements, the shapes of the various parts and the overall structure of the antenna may also be modified. For example, the first dipole 211, the second dipole 212, the third dipole 213, the fourth dipole 221, the fifth dipole 222, and the sixth dipole 223 may also be in other shapes. One end of the first ground wire 201a is connected to a certain part on the first dipole 211, and the other end is connected to a certain part on the fourth dipole 221. One end of the second ground wire 201b is connected to a certain part on the second dipole 212, and the other end is connected to a certain part on the fifth dipole 222.

[0069] Figure 2b A schematic diagram of current distribution generated in the dual radiator antenna in the above optional embodiment is shown to illustrate the working principle of the present invention.

[0070] like Figure 2b As shown, combined with Figure 2a , the current distribution of the first ground line 201a and the second ground line 201b in the coplanar waveguide (CPW) is the same, and both are opposite to the current direction of the signal line 202. This current mode constitutes the basic feature of the coplanar waveguide (CPW). The upper and lower ends of the coplanar waveguide (CPW) generate strong current areas (marked by thicker arrows) with the same current distribution, and the middle position also generates a strong current area with the current distribution opposite to that of the strong current areas at the upper and lower ends. In addition, the coplanar waveguide (CPW) generates two weak current areas (marked by thinner arrows) in the area between the upper end and the middle position and the area between the lower end and the middle position. In this optional embodiment, the coplanar waveguide (CPW) works at one wavelength, and its effective current length is one wavelength. This feature makes the current distribution direction of the first radiator consistent with the current distribution direction of the second radiator, and realizes signal superposition without changing the omnidirectional radiation characteristics, thereby improving the directivity and gain. In other optional embodiments, the length of the coplanar waveguide (CPW) can also be N wavelengths, where N is a positive integer.

[0071] According to the embodiment of the present invention, the first radiator composed of the first oscillator 211, the second oscillator 212 and the third oscillator 213 is connected to the second radiator composed of the fourth oscillator 221, the fifth oscillator 222 and the sixth oscillator 223 through a coplanar waveguide (CPW), that is, the first radiator and the second radiator are respectively located at the two ends of the coplanar waveguide (CPW), and the spacing is about one working wavelength, that is, the length of the coplanar waveguide (CPW) is about one working wavelength. In some other optional embodiments, the first radiator and the second radiator are respectively located at the two ends of the coplanar waveguide (CPW), and the spacing is about N working wavelengths, that is, the length of the coplanar waveguide (CPW) is about N working wavelengths, and N is a positive integer.

[0072] In some other optional embodiments, the antenna structure further includes a capacitive element or an inductive element or a combination of a capacitive element and an inductive element to achieve miniaturization of the antenna. The capacitive element has a capacitance component and 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. The inductive element has an inductive component and 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.

[0073] Optionally, the first radiator includes a capacitive element or an inductive element or a combination of a capacitive element and an inductive element, so as to realize miniaturization of the radiator unit. Optionally, a capacitive element or an inductive element or a combination of a capacitive element and an inductive element is connected in series to the third oscillator 213. Figure 3a As shown, an inductive element 261 is connected in series at the terminal of the third vibrator 213. Figure 3b As shown, an inductive element 262 is connected in series to the middle of the third vibrator 213. Optionally, a capacitive element or an inductive element or a combination of a capacitive element and an inductive element is connected in series to the first vibrator 211. Figure 3c As shown, an inductive element 263 is connected in series to the terminal of the first vibrator 211. Optionally, a capacitive element or an inductive element or a combination of a capacitive element and an inductive element is connected in series to the second vibrator 212. Figure 3d As shown, an inductive element 264 is connected in series in the middle of the second vibrator 212 . Figures 3a to 3d The structure of the embodiment shown is only schematic. A capacitive element, an inductive element, or a combination of a capacitive element and an inductive element can be connected in series at any position on the structure of the first oscillator 211, the second oscillator 212, or the third oscillator 213 to achieve miniaturization of the radiator unit. The number of capacitive elements can be one or more, and the number of inductive elements can be one or more.

[0074] Optionally, the second radiator includes a capacitive element or an inductive element or a combination of a capacitive element and an inductive element, so as to realize miniaturization of the radiator unit. Optionally, a capacitive element or an inductive element or a combination of a capacitive element and an inductive element is connected in series to the sixth oscillator 223. Figure 3e As shown, an inductive element 265 is connected in series at the terminal of the sixth vibrator 223. Figure 3f As shown, an inductive element 266 is connected in series to the middle of the sixth vibrator 223. Optionally, a capacitive element or an inductive element or a combination of a capacitive element and an inductive element is connected in series to the fourth vibrator 221. Figure 3g As shown, an inductive element 267 is connected in series to the middle of the fourth vibrator 221. Optionally, a capacitive element or an inductive element or a combination of a capacitive element and an inductive element is connected in series to the fifth vibrator 222. Figure 3h As shown, an inductive element 268 is connected in series to the terminal of the fifth vibrator 222 . Figure 3e to Figure 3h The structure of the embodiment shown is only schematic. A capacitive element, an inductive element, or a combination of a capacitive element and an inductive element may be connected in series at any position on the structure of the fourth oscillator 221, the fifth oscillator 222, or the sixth oscillator 223 to achieve miniaturization of the radiator unit. The number of capacitive elements may be one or more, and the number of inductive elements may be one or more.

[0075] Optionally, the coplanar waveguide (CPW) includes a capacitive element or an inductive element or a combination of a capacitive element and an inductive element to shorten the length of the coplanar waveguide (CPW). Optionally, a capacitive element or an inductive element or a combination of a capacitive element and an inductive element is connected in series to the first ground line 201a. Figure 3i As shown, an inductive element 271 is connected in series to the first ground line 201a. Optionally, a capacitive element or an inductive element or a combination of a capacitive element and an inductive element is connected in series to the second ground line 201b. Figure 3j As shown, the second ground line 201b is connected in series with an inductive element 272. Optionally, the signal line 202 is connected in series with a capacitive element or an inductive element or a combination of a capacitive element and an inductive element. Figure 3k As shown, an inductive element 273 is connected in series to the signal line 202. Optionally, a capacitive element or an inductive element or a combination of a capacitive element and an inductive element is connected between the first ground line 201a and the signal line 202. Figure 3l As shown, a capacitive element 274 is connected between the first ground line 201a and the signal line 202. Optionally, a capacitive element or an inductive element or a combination of a capacitive element and an inductive element is connected between the second ground line 201b and the signal line 202. Figure 3m As shown, a capacitive element 275 is connected between the second ground line 201 b and the signal line 202 . Figure 3i to Figure 3mThe structure of the illustrated embodiment is only schematic; a capacitive element or an inductive element or a combination of a capacitive element and an inductive element may be connected in series at any position on the structure of the first ground wire 201a, the second ground wire 201b or the signal wire 202; a capacitive element or an inductive element or a combination of a capacitive element and an inductive element may be connected at any position between the first ground wire 201a and the signal wire 202; a capacitive element or an inductive element or a combination of a capacitive element and an inductive element may be connected at any position between the second ground wire 201b and the signal wire 202, so as to realize the miniaturization of the radiator unit; the number of the capacitive elements may be one or more, and the number of the inductive elements may be one or more.

[0076] Figure 4 Another alternative embodiment of a dual radiator antenna is shown.

[0077] like Figure 4 As shown, in this optional embodiment, the dual radiator antenna includes a first dipole 311, a second dipole 312, a third dipole 313, a fourth dipole 321, a fifth dipole 322, a sixth dipole 323, a first ground line 301a, a second ground line 301b, a signal line 302 and a feeding circuit 300. Figure 2a In this optional embodiment, the coplanar waveguide (CPW) has an S-shaped bending portion, which can increase the effective current length of the coplanar waveguide (CPW), shorten the distance between the first radiator and the second radiator, and realize the miniaturization of the antenna. Of course, Figure 4 The coplanar waveguide (CPW) structure of the illustrated embodiment is merely illustrative; according to the teachings of the present invention and specific design requirements, the shape and structure of the coplanar waveguide (CPW) may also adopt other variations.

[0078] Figure 5 Shows Figure 2a S-parameter diagram of the dual-radiator antenna of the illustrated embodiment.

[0079] like Figure 5 As shown, curve 400 is the reflection coefficient generated by the dual radiator antenna, and its resonant frequency is around 2.45 GHz, which has a broadband characteristic. It can be seen that the first radiator composed of the first vibrator, the second vibrator and the third vibrator and the second radiator composed of the fourth vibrator, the fifth vibrator and the sixth vibrator all operate in the same frequency band.

[0080] Figure 6 Shows Figure 2a Radiation pattern of the dual radiator antenna of the illustrated embodiment.

[0081] like Figure 6As shown, curve 500 is the radiation pattern generated by the dual radiator antenna on the H plane. The shape of the radiation pattern is close to a circle, and the maximum gain value exceeds 5dBi, while the maximum gain value of the traditional dipole antenna is only 1-2dBi. It can be seen that the omnidirectional radiation characteristics of the first radiator and the second radiator in the antenna structure of the embodiment of the present invention have not changed, and the gain value has increased significantly. The two radiators connected by the coplanar waveguide (CPW) produce the effect of signal superposition, thereby realizing the characteristics of high gain and omnidirectional radiation, and have the advantages of wide signal coverage, fast communication rate, and long propagation distance.

[0082] In some other optional embodiments, the embodiments of the present invention further provide an electronic device, which includes the dual radiator antenna described in any of the above optional embodiments. For example, the electronic device is a router, or a network box, or a set-top box, or a wireless access point device, or a vehicle-mounted station, or a drone, etc.

[0083] The present invention is not limited to the structures which have been described above and shown in the drawings, and various modifications and changes may be made without departing from the scope thereof. The scope of the present invention is limited only by the appended claims.

Claims

1. A dual radiator antenna, characterized in that: include: A first radiator, a second radiator and a coplanar waveguide, the first radiator and the second radiator are connected by the coplanar waveguide, and the first radiator, the second radiator and the coplanar waveguide are all laid on a printed circuit board; wherein, The first radiator includes a first oscillator (211), a second oscillator (212) and a third oscillator (213); the second radiator includes a fourth oscillator (221), a fifth oscillator (222) and a sixth oscillator (223); The coplanar waveguide comprises a first ground line (201a), a second ground line (201b) and a signal line (202); the first ground line (201a) and the second ground line (201b) are respectively located on both sides of the signal line (202); and gaps are respectively provided between the first ground line (201a) and the second ground line (201b) and the signal line (202); One end of the first ground wire (201a) is connected to the first oscillator (211) in the first radiator, and the other end is connected to the fourth oscillator (221) in the second radiator; one end of the second ground wire (201b) is connected to the second oscillator (212) in the first radiator, and the other end is connected to the fifth oscillator (222) in the second radiator; One end of the signal line (202) is connected to the feeding circuit (200), and the other end is connected to the sixth oscillator (223) in the second radiator; One end of the feeding circuit (200) is connected to the signal line (202), and the other end is connected to the third oscillator (213) in the first radiator; In the coplanar waveguide, the current distribution of the first ground line (201a) and the second ground line (201b) is the same, and both are opposite to the current direction of the signal line (202); the coplanar waveguide operates at N wavelengths, N is a positive integer, so that the current distribution direction of the first radiator is consistent with the current distribution direction of the second radiator; The first vibrator and the second vibrator are both L-shaped and mirror-symmetrical with the signal line (202), the horizontal side of the first vibrator and the horizontal side of the second vibrator are arranged on the inner side, and the vertical side of the first vibrator and the vertical side of the second vibrator are arranged on the outer side; the third vibrator is inverted U-shaped and is located below the first vibrator and the second vibrator; the fourth vibrator and the fifth vibrator are both inverted L-shaped and mirror-symmetrical with the signal line (202), the horizontal side of the fourth vibrator and the horizontal side of the fifth vibrator are arranged on the inner side, and the vertical side of the fourth vibrator and the vertical side of the fifth vibrator are arranged on the outer side; the sixth vibrator is U-shaped and is located above the fourth vibrator and the fifth vibrator; the above-mentioned inner side and outer side are relative to the distance from the signal line (202), the horizontal side of the L-shaped structure is closer to the signal line (202) and is located on the inner side, and the vertical side of the L-shaped structure is farther away from the signal line (202) and is located on the outer side; The horizontal side terminal of the first vibrator (211) is connected to the horizontal side terminal of the fourth vibrator (221) through the first ground line (201a), and the horizontal side terminal of the second vibrator (212) is connected to the horizontal side terminal of the fifth vibrator (222) through the second ground line (201b); one end of the signal line (202) is connected to the feeding circuit (200), and the other end is connected to the horizontal side of the sixth vibrator (223); one end of the feeding circuit (200) is connected to the signal line (202), and the other end is connected to the horizontal side of the third vibrator (213).

2. A dual radiator antenna as claimed in claim 1, characterized in that: The resonance frequency of the first radiator is adjusted by adjusting any one or more of the length of the first vibrator (211), the length of the second vibrator (212) and the length of the third vibrator (213).

3. A dual radiator antenna as claimed in claim 1, characterized in that: The resonance frequency of the second radiator is adjusted by adjusting any one or more of the length of the fourth vibrator (221), the length of the fifth vibrator (222) and the length of the sixth vibrator (223).

4. A dual radiator antenna as claimed in claim 1, characterized in that: The characteristic impedance of the coplanar waveguide is adjusted by adjusting any one or more of the width of the signal line (202), the distance between the first ground line (201a) and the signal line (202), and the distance between the second ground line (201b) and the signal line (202).

5. The dual radiator antenna according to claim 1, characterized in that: It also includes capacitive elements or inductive elements or a combination of capacitive elements and inductive elements.

6. A dual radiator antenna as claimed in claim 1, characterized in that: The coplanar waveguide has a bent portion.

7. An electronic device, characterized in that: Comprising the dual radiator antenna as described in any one of claims 1 to 6.

Images