Double-ridged horn antenna structure and electronics

Abstract

The present invention proposes a dual-ridged horn antenna structure and electronic equipment for ensuring antenna performance. The dual-ridged horn antenna structure comprises: two heterogeneously placed dual-ridged horn antennas, each comprising a dual-ridged horn antenna element and an impedance transformation balun, with the dual-ridged horn antenna element constructed on the impedance transformation balun; a first-stage coupling line and a second-stage coupling line, wherein the first-stage coupling line comprises a first sub-coupling line and a second sub-coupling line, each of which is independently provided. The first sub-coupling line is provided near one of the dual-ridged horn antennas, the second sub-coupling line is provided near the other dual-ridged horn antenna, and the second-stage coupling line is provided near the first and second sub-coupling lines.

Description

Technical Field

[0001] The present invention relates to the field of antenna technology, and in particular to a double-ridged horn antenna structure and electronic equipment. Background Art

[0002] With the rapid development of various communication technologies, wireless communication devices have become a necessity in daily life. Future 5G and Wi-Fi communication systems are areas that the industry is encouraging development. These communication technologies share a common characteristic: extremely wide operating bandwidths. Ultra-wideband backbone networks can carry a wealth of network information resources, meeting the diverse information needs of individuals and businesses. Wireless LAN (Wi-Fi), as a short-range communication mode, is widely used in daily life at home and is the best enabler for 5G wide-area wireless networks, ensuring comprehensive wireless signal coverage.

[0003] The inventors' research found that the WIFI communication protocol has now developed to the WIFI6E stage, using ultra-high-speed ultra-wideband communication technology. This technology uses a multi-antenna multi-port MIMO working mode and also has multi-band system technology. However, the development of new technologies also brings new problems. Because WIFI6E uses a new communication frequency, the number of antennas has increased by half compared to the previous generation WIFI6, but the internal space of the new product is getting smaller and smaller. How to ensure high isolation performance between multiple antennas in a space smaller than a certain wavelength is an urgent problem to be solved. Summary of the Invention

[0004] The present invention provides a double-ridged horn antenna structure and electronic equipment, which can achieve high isolation working performance between multiple antennas.

[0005] To solve the above technical problems, the present invention provides an antenna matching circuit in a first aspect, comprising: a switch tube, an adjustable varactor diode, a first bias circuit, a second bias circuit, and a control unit; wherein:

[0006] A double-ridged horn antenna structure, comprising:

[0007] Two heterogeneously placed double-ridged horn antennas, each of which includes a double-ridged horn antenna element and an impedance transformation balun, wherein the double-ridged horn antenna element is constructed on the impedance transformation balun;

[0008] A first-level coupling line and a second-level coupling line, the first-level coupling line includes a first sub-coupling line and a second sub-coupling line, respectively, the first sub-coupling line is arranged close to one of the double-ridged horn antennas, the second sub-coupling line is arranged close to the other double-ridged horn antenna, and the second-level coupling line is arranged close to the first sub-coupling line and the second sub-coupling line.

[0009] In some embodiments, the two heterogeneously placed dual-ridged horn antennas are located in the same plane; and / or, the extension lines of the antenna axes of the two heterogeneously placed dual-ridged horn antennas intersect.

[0010] In some embodiments, the double-ridged horn antenna vibrator includes a first vibrator and a second vibrator, the first vibrator includes a first part and a first radiating part, the second vibrator includes a second radiating part and a connecting part, the impedance transformation balun includes a first part, a second part and a third part that are connected in sequence to form a concave shape, the end of the first part facing away from the third part is connected to the first radiating part, the end of the third part facing away from the second part is connected to the connecting part, the first radiating part and the second radiating part extend to form a double ridge, and a gap is formed between the first vibrator and the second vibrator.

[0011] In some embodiments, the first portion of the first sub-coupling line is arranged close to the impedance transformation balun of one of the double-ridged horn antennas, a point of the first sub-coupling line is connected to the radiator of one of the double-ridged horn antennas, and the second portion of the first sub-coupling line is offset from the antenna axis of one of the double-ridged horn antennas at a preset angle; the first portion of the second sub-coupling line is arranged close to the impedance transformation balun of the other double-ridged horn antenna, a point of the second sub-coupling line is connected to the radiator of the other double-ridged horn antenna, and the second portion of the second sub-coupling line is offset from the antenna axis of the other double-ridged horn antenna at a preset angle.

[0012] In some embodiments, a certain point of the first sub-coupling line is a midpoint of the first sub-coupling line, and a certain point of the second sub-coupling line is a midpoint of the second sub-coupling line.

[0013] In some embodiments, the preset angle is 45 degrees.

[0014] In some embodiments, the total length of the first-stage coupling line is related to the center frequency point of the antenna operating frequency.

[0015] In some embodiments, the second-stage coupling line is a closed-loop coupling line, and the second-stage coupling line is disposed close to the first-stage coupling line.

[0016] In some embodiments, the second-level coupling line includes a first oblique side, a second oblique side, and a recessed portion, the first oblique side is arranged close to the first portion of the first sub-coupling line, the second oblique side is arranged close to the first portion of the second sub-coupling line, and one end of the second portion of the first sub-coupling line and one end of the second portion of the second sub-coupling line are located in the recessed portion.

[0017] An electronic device, characterized by comprising a double-ridged horn antenna structure as described in any of the above items. Exemplarily, the electronic device may be a WIFI product or other radio frequency terminal device, which is not limited here.

[0018] In summary, this embodiment provides a double-ridged horn antenna structure, and an electronic device using the double-ridged horn antenna structure. In one of the schemes, the double-ridged horn antenna structure is arranged by arranging the entire structure on one plane, including a pair of double-ridged broadband horn antennas, a first-stage decoupling line combination, a second-stage coupling line, and two signal feeding points. This decoupling structure can achieve high isolation when any two dipole antennas are combined. At the same time, the cross placement at a preset angle also reserves a path for the welding and routing of signal cables, which can effectively avoid additional isolation disturbances generated when the signal cables are used. In addition, the antenna can also be designed as a separate PCB small board, installed as a plug-in or card, or the structure can be realized by a metal stamping process, or it can be directly designed and combined with the PCB main board and the PCB of the whole machine circuit using the double-ridged horn antenna structure into an integral main board to achieve a low-cost effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0020] Figure 1 1 is a structural diagram of a double-ridged horn antenna structure provided by an embodiment of the present invention;

[0021] Figure 2 This is a schematic diagram of a specific structure of a double-ridged horn antenna provided by an embodiment of the present invention;

[0022] Figure 3 1 is a schematic diagram of the arrangement of a first-stage coupling line provided by an embodiment of the present invention;

[0023] Figure 4 This is a schematic structural diagram of a first-stage coupling line provided by an embodiment of the present invention;

[0024] Figure 5 1 is a schematic diagram of the arrangement of a second-stage coupling line provided by an embodiment of the present invention;

[0025] Figure 6 1 is a schematic structural diagram of a second-stage coupling line provided by an embodiment of the present invention;

[0026] Description of reference numerals:

[0027] Double-ridged horn antenna; 100-first radiating element; 110-first radiating portion; 120-first curved segment; 130-first straight segment; 200-second radiating element; 210-second radiating portion; 220-connecting portion; 230-second curved segment; 240-second straight segment; 300-impedance transformation balun; 310-first part of the impedance transformation balun; 320-second part of the impedance transformation balun; 330-third part of the impedance transformation balun; 400-cavity.

[0028] 10a-first double-ridged horn antenna; 10b-second double-ridged horn antenna; 20-first-stage coupling line; 30-second-stage coupling line;

[0029] 20a - first sub-coupling line; 201a - first part of the first sub-coupling line; 202a - second part of the first sub-coupling line; 20b - second sub-coupling line; 201b - first part of the second sub-coupling line; 202b - second part of the second sub-coupling line;

[0030] 301 - first oblique side; 302 - second oblique side; 30 - recessed portion. DETAILED DESCRIPTION

[0031] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0032] It should be noted that when an element is referred to as being “fixed on” or “disposed on” another element, it may be directly on the other element or indirectly on the other element. When an element is referred to as being “connected to” another element, it may be directly connected to the other element or indirectly connected to the other element.

[0033] It should be understood that the terms "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the present invention 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 limiting the present invention.

[0034] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature identified as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, "plurality" means two or more, unless otherwise specifically defined.

[0035] like Figure 1 As shown, an embodiment of the present invention provides a dual-ridged horn antenna structure, comprising: two heterogeneously placed dual-ridged horn antennas, wherein the dual-ridged horn antennas include a dual-ridged horn antenna element and an impedance transformation balun, and the dual-ridged horn antenna element is constructed on the impedance transformation balun. Exemplarily, the dual-ridged horn antenna element is constructed as a whole on a horizontally placed impedance transformation balun, and this impedance transformation balun adopts a heterogeneous horizontal placement. For ease of description, the two heterogeneously placed dual-ridged horn antennas are referred to herein as a first dual-ridged horn antenna 10a and a second dual-ridged horn antenna 10b, respectively. When in use, the two dual-ridged horn antennas are used to be constructed on the same surface of a printed circuit board (PCB). That is, in some embodiments, the two heterogeneously placed dual-ridged horn antennas can be located on the same plane.

[0036] In some embodiments, the two double-ridged horn antennas are two broadband miniature heterogeneous double-ridged horn antennas, that is, the two double-ridged horn antennas have the characteristics of heterogeneity and miniature.

[0037] In some embodiments, as Figure 2 As shown, a specific double-ridged horn antenna is provided, such as Figure 2As shown, the double-ridged horn antenna 10 (the first double-ridged horn antenna 10a or the second double-ridged horn antenna 10b) includes a first oscillator 100 and a second oscillator 200, wherein the first oscillator 100 includes a first portion 310 and a first radiating portion 110, and the second oscillator 200 includes a second radiating portion 210 and a connecting portion 220. The impedance transformation balun 300 includes a first portion 310, a second portion 320, and a third portion 330 that are sequentially connected and form a concave shape. For example, the first portion 310, the second portion 320, and the third portion 330 are connected in sequence. The parts 330 are connected in sequence to form a U-shaped structure; the end of the first part 310 facing away from the third part 330 is connected to the first radiating part 110, and the end of the third part 330 facing away from the second part 320 is connected to the connecting part 220. The first radiating part 110 and the second radiating part 210 extend to form a double ridge. Exemplarily, the first radiating part 110 and the second radiating part 210 extend in the same direction to form a double ridge, and a gap is formed between the first oscillator 100 and the second oscillator 200, and this gap is used to feed signals.

[0038] In some embodiments, the vibrator of the double-ridged horn antenna 10 belongs to a double-ridged horn broadband resonant structure, that is, the first vibrator 100 and the second vibrator 200 belong to a double-ridged horn broadband resonant structure. For example, the upper limit cutoff frequency of the double-ridged waveguide of the double-ridged horn is set to the highest frequency, and the signal feeding point is in the middle position of the bottom of the vibrator.

[0039] In one embodiment, in order to effectively eliminate high-order mode turbulence on the first radiating element 100 and the second radiating element 200 , the length of the cavity 400 formed by the impedance transformation balun is 1 / 4 wavelength of the center frequency of the antenna's operating frequency.

[0040] In an optional embodiment, the ridge line of the first radiating element 100 includes a first straight line segment 130 and a first curved line segment 120 , and the ridge line of the second radiating element 200 includes a second straight line segment 240 and a second curved line segment 230 , and the first curved line segment 120 and the second curved line segment 230 are symmetrically arranged.

[0041] It should be noted that, for ease of description, in the subsequent figures and the specification, the serial numbers of the first and second dual-ridged horn antennas may be distinguished by adding a and b to the numbers. For example, the first dual-ridged horn antenna 10a includes a first oscillator 100a and a second oscillator 200a, and the second dual-ridged horn antenna 10b includes a first oscillator 100b and a second oscillator 200b. The other components of the antenna structure are similar and will not be repeated here.

[0042] In this embodiment, the first double-ridged horn antenna 10a and the second double-ridged horn antenna 10b, by adopting a double-ridged horn structure as a radiating oscillator, on the one hand effectively ensure the effective working bandwidth of the antenna; on the other hand, the two double-ridged horn antennas utilize the microstrip conduction impedance transformation effect of their corresponding impedance transformation baluns, and use the impedance transformation balun as a high-order mode signal current elimination structure to achieve current anti-phase cancellation, eliminate the residual current on the oscillator, effectively stabilize the current fluctuation on the surface of the input signal cable, and ensure that the radiated signal frequency is in a broadband state and a high-efficiency state; the impedance transformation balun includes a first part 310, a second part 320 and a third part 330 that are connected in sequence to form a concave "U" shape, which also effectively reduces the overall height size of the antenna and improves practicality.

[0043] In some embodiments, the extension lines of the antenna axes of the two heterogeneously placed dual-ridged horn antennas form an orthogonal intersection, that is, the extension lines of the antenna axes of the first dual-ridged horn antenna 10a and the second dual-ridged horn antenna 10b form an orthogonal intersection. Exemplarily, the extension lines of the antenna axes of the first dual-ridged horn antenna 10a and the second dual-ridged horn antenna 10b form an orthogonal intersection at ±45 degrees. It should be noted that the antenna axis of the first dual-ridged horn antenna 10a is a line perpendicular to the third portion of the impedance transformation balun of the first dual-ridged horn antenna 10a. Similarly, the antenna axis of the second dual-ridged horn antenna 10b is a line perpendicular to the third portion of the impedance transformation balun of the second dual-ridged horn antenna 10b.

[0044] In some embodiments, Figure 1 As shown by the bidirectional arrows a, b and c, the intermediate spacing between the first double-ridged horn antenna 10a and the second double-ridged horn antenna 10b, calculated from low to high, the distance of a is 0.4λ, the distance of b is 1 / 4λ, and the distance of c is 1 / 10λ, where λ refers to the center frequency point of the antenna operating frequency.

[0045] In some embodiments, the closest distance between the first and second dual-ridged horn antennas 10a, 10b is distance c, or 1 / 10λ. It should be noted that the inventors have verified and researched that when the first and second dual-ridged horn antennas 10a, 10b are coplanar, this close distance results in a high degree of coupling between their radiated signals. This effectively increases the compactness of the two dual-ridged horn antennas and reduces layout space. To minimize the impact of this coupling, the present application introduces a two-stage coupling line.

[0046] That is, the dual-ridged horn antenna structure provided herein also includes a first-stage coupling line 20 and a second-stage coupling line 30. The first-stage coupling line 20 includes a first sub-coupling line 20a and a second sub-coupling line 20b, each independently provided. The first sub-coupling line 20a is positioned near one of the dual-ridged horn antennas (the first dual-ridged horn antenna 10a), and the second sub-coupling line 20b is positioned near the other dual-ridged horn antenna (the first dual-ridged horn antenna 10b). The second-stage coupling line 30 is positioned near both the first sub-coupling line 20a and the second sub-coupling line 20b. These two stages of coupling lines are described in detail below.

[0047] Regarding the first-stage coupling line 20

[0048] like Figure 3 and Figure 4 As shown, Figure 3 and Figure 4 In the figure, the dotted line marks the first-stage coupling line 20, the first part 201a of the first sub-coupling line 20a is close to the impedance transformation balun of one of the double-ridged horn antennas 10a, a point of the first sub-coupling line is connected to the radiator of the double-ridged horn antenna 10a, and the second part 202a of the first sub-coupling line 20a is offset from the antenna axis of the double-ridged horn antenna 10a by a preset angle; the first part 201b of the second sub-coupling line 20b is close to the impedance transformation balun of the other double-ridged horn antenna 10b, a point of the second sub-coupling line 20b is connected to the radiator of the other double-ridged horn antenna 10b, and the second part 202b of the second sub-coupling line 20b is offset from the antenna axis of the double-ridged horn antenna 10b by a preset angle.

[0049] In some embodiments, a certain point of the first sub-coupling line 20a is the middle point of the first sub-coupling line 20a, and a certain point of the second sub-coupling line 20b is the middle point of the second sub-coupling line 20b. For example, in some specific embodiments, the middle point of the first sub-coupling line 20a is connected to the connecting portion 220a of the second dipole 200a of the double-ridged horn antenna 10a ( Figure 3 The middle point of the second sub-coupling line 20b is connected to the connecting portion 220b of the second oscillator 200b of the double-ridged horn antenna 10b ( Figure 3 center X2 point).

[0050] I understand. Figure 3Points X1 and X2 are the direct connection points between the first-stage coupling line 20 and the dual-ridged horn antenna body, and are the midpoints between the first sub-coupling line 20a and the second sub-coupling line 20b, respectively. The first sub-coupling line 20a and the second sub-coupling line 20b extend from their respective midpoints to their respective ends. In some embodiments, the first sub-coupling line 20a and the second sub-coupling line 20b extend from their respective midpoints to their respective ends, forming symmetrical 1 / 2λ lines. Microstrip line theory indicates that for a microstrip line with a length of 1 / 2λ, the impedance at the end and the starting end of the sub-coupling line are identical, and the signal amplitude is equal. Therefore, the signal current absorbed from point X1 or point X2 will have completely opposite phases at the two ends of the first-stage coupling line, ultimately being consumed by the transmission line.

[0051] In some embodiments, by substituting the dielectric constant of the antenna back substrate material into the microstrip line transmission formula, it can be calculated that the total length of the first-stage coupling line 20 is 1λ, that is, the total length of the first sub-coupling line 20a and the second sub-coupling line 20b is 1λ. The following relationship exists:

[0052] ;

[0053] ;

[0054] in, is the relative dielectric constant of the substrate medium on the back of the antenna, is the propagation speed of electromagnetic waves in air, is the relative dielectric constant of air, which is approximately equal to 1, so it can be considered , That is the speed of light.

[0055] It can be seen that the total length of the first-stage decoupling line 20 is 1*λ (λ=C / f), where λ is the center frequency of the antenna operating frequency. It is directly connected to the ground edge of the antenna at the midpoint of the first-stage decoupling line 20, serving as the maximum position of the coupled signal. In addition, the oblique side of the first sub-coupling line 20a (i.e., the first portion 201a of the first sub-coupling line 20a) is close to the bottom edge of the first double-ridged horn antenna 10a, and the oblique side of the second sub-coupling line 20b (i.e., the first portion 201b of the second sub-coupling line 20b) is close to the bottom edge of the second double-ridged horn antenna 10b. In other words, the first-stage coupling line and the antenna body are closely coupled at the bottom of the corresponding horizontal impedance transformation balun, and are connected to the first-stage coupling line at the bottom of the radiating portion at one end of the antenna. This point (X1, X2) is the approximate midpoint of the first-stage coupling line. This generates the first signal current coupling, which flows along the first-stage decoupling line 20 toward the vertically downward transmission line in the middle (the second portion 202a of the first sub-coupling line 20a and the first portion 202b of the second sub-coupling line 20b). Because the length of this downward transmission line is approximately 1 / 2λ, and due to the impedance invariance of the transmission line principle, the signal will be significantly lost during transmission.

[0056] In one embodiment, the preset angle is 45 degrees, that is, the total length of the first-stage coupling line 20 is set according to the antenna operating frequency, and its total length is one wavelength λ, of which half of the wavelength 1 / 2λ is closely coupled to the bottom of the horizontal impedance transformation balun, the middle point is directly connected to the radiator of the double-ridged horn antenna, and the other half of the wavelength forms a 45-degree angle deviation with the antenna axis.

[0057] Regarding the second-stage coupling line 30

[0058] In one embodiment, if Figure 1 、 Figure 5 and Figure 6 As shown, Figure 5 and Figure 6 The dotted line in the middle is the second-stage coupling line 30 , which is a closed-loop coupling line. The second-stage coupling line 30 is arranged close to the first-stage coupling line 20 .

[0059] The second-stage coupling line 30 includes a first oblique edge 301, a second oblique edge 302, and a recess 303. The first oblique edge 301 is arranged close to the first portion 201a of the first sub-coupling line 20a, and the second oblique edge 302 is arranged close to the first portion 201b of the second sub-coupling line 20b. One end of the second portion 202a of the first sub-coupling line 20a and one end of the second portion 202b of the second sub-coupling line 2b are located in the recess 303.

[0060] In this embodiment, the same principle as the first-stage coupling line 20 is used to completely consume the residual signal current that has not been completely consumed on the first-stage coupling line on the second-stage coupling line 30, thereby preventing the signal from being reversely coupled to the first double-ridged horn antenna 10a and the second double-ridged horn antenna 10b to generate interference, thereby reducing the isolation index.

[0061] In some embodiments, the total length of the second-stage coupling line is approximately 2*λ (λ=C / f), where λ is the center frequency of the antenna operating frequency. Figure 5 The thick dashed line in the figure represents the midline dividing plane, which separates the second-stage coupling line 30, corresponding to the first and second dual-ridged horn antennas 10a, 10b on the left and right sides, respectively. The second-stage coupling line 30 is in close proximity to the first-stage coupling line 20, generating secondary signal current coupling. This signal current propagates along the entire loop of the second-stage coupling line 20. Because the length of each side is approximately 1*λ, a complete impedance segment is created, completely dissipating the signal during transmission. In other words, the second-stage coupling line forms a closed loop, set according to the antenna operating frequency. Its two oblique sides are closely coupled to the first-stage coupling line 20 at a 45-degree angle. Its total length is two wavelengths, and it is symmetrical about the central axis.

[0062] It should be noted that both the first-stage coupled line 20 and the second-stage coupled line 30 are based on the transmission line analysis method of microwave theory. When the impedance of any points λ / 2 apart on the transmission line is the same, it is generally called λ / 2 repeatability. The specific relationship formula is as follows:

[0063] ;

[0064] ;

[0065] in is the characteristic impedance of the transmission line, is the input voltage, is the input current, and Using the cosine function to represent it, we get the above formula. is the phase shift constant.

[0066] The inventors also found that it is worth emphasizing that even if the conventional dual-antenna combination mode adopts a ±45° orthogonal distribution to improve the isolation at close range, there are some disadvantages. First, the ±45° orthogonal design must adopt a double-sided PCB process, which is relatively costly. Second, the isolation of its close-range dual-antenna combination has certain limits. The reason is that the PCB processing precision causes the high-frequency induced current formed by the subtle sawtooth fluctuations on the edge of the trace to form multi-mode coupling. In addition, the RF wires for signal feed are connected to the antenna input port, and the two wires cross and pass through the resulting epidermal current coupling. These factors will lead to a significant deterioration in isolation.

[0067] The antenna structure provided in the embodiments of the present invention utilizes two dual-ridged horn antennas, constructed in the same plane and forming a ±45° orthogonal crossover, ensuring basic isolation requirements. A reasonable amount of space is reserved between the two dual-ridged horn antennas for routing the signal feed RF cables, effectively mitigating the possibility of mutual interference between the RF cables. Furthermore, a two-stage coupling line is employed between the two dual-ridged horn antennas to guide and dissipate the back-radiated current of the antennas, achieving high isolation.

[0068] In addition, the overall double-ridged horn antenna structure can be produced using PCB technology, and the installation methods include plug-in, mounting, etc. The PCB of the entire machine circuit using the double-ridged horn antenna structure is merged into one, thereby improving the portability and ease of use of the entire subsequent electronic equipment using the double-ridged horn antenna structure.

[0069] In one embodiment, an electronic device is provided, including the dual-ridged horn antenna structure described in any of the above embodiments. The electronic device may be a WIF6 product or other radio frequency terminal device, which is not specifically limited in this embodiment.

[0070] It should also be noted that regarding the technical effects of the terminal device using the double-ridged horn antenna structure, please refer to the above description and will not be repeated here.

[0071] In summary, this embodiment provides a double-ridged horn antenna structure, and an electronic device using the double-ridged horn antenna structure. The double-ridged horn antenna structure is realized by arranging the entire structure on one plane, including a pair of double-ridged broadband horn antennas, a first-stage decoupling line combination, a second-stage coupling line combination, and two signal feeding points. This decoupling structure can achieve high isolation when any two dipole antennas are combined. At the same time, the cross placement at a preset angle also reserves a path for the welding and routing of signal cables, which can effectively avoid additional isolation disturbances generated when the signal cables are used. The antenna can also be designed as a separate PCB small board, installed as a plug-in or card, or the structure can be realized by a metal stamping process, or it can be directly designed and merged with the PCB main board and the PCB of the whole machine circuit using the double-ridged horn antenna structure into an integral main board to achieve a low-cost effect.

[0072] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit the same. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. These modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the various embodiments of the present invention, and should all be included in the scope of protection of the present invention.

Claims

1. A double-ridged horn antenna structure, characterized in that: include: Two heterogeneously placed double-ridged horn antennas, each of which includes a double-ridged horn antenna element and an impedance transformation balun, wherein the double-ridged horn antenna element is constructed on the impedance transformation balun; a first-stage coupling line and a second-stage coupling line, wherein the first-stage coupling line includes a first sub-coupling line and a second sub-coupling line, respectively, the first sub-coupling line being disposed near one of the dual-ridged horn antennas, the second sub-coupling line being disposed near the other dual-ridged horn antenna, and the second-stage coupling line being disposed near the first sub-coupling line and the second sub-coupling line; The first part of the first sub-coupling line is arranged close to the impedance transformation balun of one of the double-ridged horn antennas, a point of the first sub-coupling line is connected to the radiator of one of the double-ridged horn antennas, and the second part of the first sub-coupling line is offset from the antenna axis of one of the double-ridged horn antennas at a preset angle; the first part of the second sub-coupling line is arranged close to the impedance transformation balun of the other double-ridged horn antenna, a point of the second sub-coupling line is connected to the radiator of the other double-ridged horn antenna, and the second part of the second sub-coupling line is offset from the antenna axis of the other double-ridged horn antenna at a preset angle.

2. The double-ridged horn antenna structure according to claim 1, wherein: The two heterogeneously placed double-ridged horn antennas are located in the same plane; and / or the extension lines of the antenna axes of the two heterogeneously placed double-ridged horn antennas intersect.

3. The double-ridged horn antenna structure according to claim 1, wherein: The double-ridged horn antenna element includes a first element and a second element, the first element includes a first part and a first radiating part, the second element includes a second radiating part and a connecting part, the impedance transformation balun includes a first part, a second part and a third part that are connected in sequence to form a concave shape, the end of the first part facing away from the third part is connected to the first radiating part, the end of the third part facing away from the second part is connected to the connecting part, the first radiating part and the second radiating part extend to form a double ridge, and a gap is formed between the first element and the second element.

4. The double-ridged horn antenna structure according to claim 1, wherein: A certain point of the first sub-coupling line is a midpoint of the first sub-coupling line, and a certain point of the second sub-coupling line is a midpoint of the second sub-coupling line.

5. The double-ridged horn antenna structure according to claim 4, wherein: The preset angle is 45 degrees.

6. The double-ridged horn antenna structure according to any one of claims 1 to 5, wherein: The total length of the first-stage coupling line is related to the center frequency point of the antenna operating frequency.

7. The double-ridged horn antenna structure according to any one of claims 1 to 5, wherein: The second-stage coupling line is a closed-loop coupling line, and the second-stage coupling line is arranged close to the first-stage coupling line.

8. The double-ridged horn antenna structure according to claim 7, wherein: The second-level coupling line includes a first oblique side, a second oblique side and a recessed portion, the first oblique side is arranged close to the first part of the first sub-coupling line, the second oblique side is arranged close to the first part of the second sub-coupling line, and one end of the second part of the first sub-coupling line and one end of the second part of the second sub-coupling line are located in the recessed portion.

9. An electronic device, characterized in that: It comprises the double-ridged horn antenna structure as described in any one of claims 1 to 8.

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