Antenna structure and communication equipment

Abstract

The invention provides an antenna structure and communication equipment. The antenna structure comprises a first dielectric plate and a radiation patch arranged on the first dielectric plate, the radiation patch is provided with a first edge, a second edge, a third edge, a fourth edge, a fifth edge and a sixth edge, the first edge and the fourth edge are oppositely arranged, the fifth edge and the second edge are oppositely arranged, the first edge is connected with the fifth edge through the sixth edge, and the second edge is connected with the fifth edge through the third edge. The second edge is connected with the fourth edge through the third edge, obtuse angles are formed between the third edge and the second edge and between the third edge and the fourth edge, and obtuse angles are formed between the sixth edge and the first edge and between the sixth edge and the fifth edge; the radiation patch is provided with a slot penetrating through the radiation patch, and the slot is used for adjusting the resonance frequency point position and the resonance intensity. And / or the antenna structure further comprises a resonant ring which is arranged on the first dielectric plate and surrounds the radiation patch; the resonant ring is used for adjusting the number of resonant points.

Description

Technical Field

[0001] The present disclosure relates to the field of thin-film communication antenna device design, and particularly to an antenna structure and a communication device. Background Art

[0002] Microstrip patch antennas have the advantages of low profile, simple structure, light weight and easy processing. The patch antenna combined with circular polarization characteristics can enhance its ability to resist path attenuation and path interference, and has obvious application advantages in scenarios such as mobile phone antennas, satellite communications, Bluetooth modules and WLAN.

[0003] The traditional implementation method of circular polarization of microstrip antennas requires complex structural design. However, application scenarios such as mobile phones and Bluetooth of patch antennas often require small volume and high integration. Therefore, it is of practical significance to design a circularly polarized patch antenna with a simple structure. Summary of the Invention

[0004] The present disclosure aims to solve at least one of the technical problems existing in the prior art, and proposes an antenna structure.

[0005] To achieve the above object, in a first aspect, the present disclosure provides an antenna structure, including a first dielectric substrate and a radiation patch disposed on the first dielectric substrate; the radiation patch has a first edge, a second edge, a third edge, a fourth edge, a fifth edge and a sixth edge, the first edge and the fourth edge are oppositely disposed, the fifth edge and the second edge are oppositely disposed, the first edge is connected to the fifth edge through the sixth edge, the second edge is connected to the fourth edge through the third edge, the third edge forms an obtuse angle with both the second edge and the fourth edge, and the sixth edge forms an obtuse angle with both the first edge and the fifth edge;

[0006] A slot penetrating the radiation patch is disposed on the radiation patch, and the slot is used to adjust the resonant frequency point position and resonant intensity of the antenna structure;

[0007] and / or,

[0008] The antenna structure further includes a resonant ring disposed on the first dielectric substrate and surrounding the radiation patch; the resonant ring is used to adjust the number of resonant points of the antenna structure.

[0009] Optionally, the shapes of the inner edge and the outer edge of the positive projection of the resonant ring on the first dielectric substrate are the same as the shape of the radiation patch.

[0010] Optionally, the maximum width of the resonant loop in the first direction and the maximum width in the second direction are both 90 mm - 125 mm. The first direction is the arrangement direction of the first edge and the fourth edge, and the second direction is the arrangement direction of the second edge and the fifth edge.

[0011] Optionally, the antenna structure includes a resonant loop; there is a spacer region between the resonant loop and the radiation patch. The spacer region surrounds the radiation patch, and the width of the spacer region is 16 mm - 20 mm.

[0012] Optionally, the antenna structure includes a resonant loop; the loop width of the resonant loop is 8 mm - 15 mm.

[0013] Optionally, a slot is provided on the radiation patch, and the width of the slot is 1 mm - 4 mm.

[0014] Optionally, a slot is provided on the radiation patch; the orthographic projection of the slot on the first dielectric plate is a rectangular ring, and each side outside the rectangular ring is respectively parallel to the first edge, the second edge, the fourth edge, and the fifth edge.

[0015] Optionally, the length of each side outside the rectangular ring is 29 mm - 32 mm.

[0016] Optionally, a slot is provided on the radiation patch; the slot includes a first strip portion and a second strip portion that intersect each other; the first strip portion is parallel to the first edge and the second strip portion is parallel to the second edge; or, the first strip portion is parallel to the third edge and the second strip portion is perpendicular to the third edge.

[0017] Optionally, a slot is provided on the radiation patch; the orthographic projection of the slot on the first dielectric plate is a circular ring.

[0018] Optionally, the distance between the first edge and the fourth edge and the distance between the second edge and the fifth edge are both 58 mm - 61 mm.

[0019] Optionally, the antenna structure further includes:

[0020] A feeding board, which is arranged on the side of the first dielectric plate away from the radiation patch and is used for transmitting antenna signals;

[0021] A coupling board, which is arranged between the first dielectric plate and the feeding board and is used for coupling the antenna signals on the feeding board to the radiation patch.

[0022] Optionally, the feeding board includes a second dielectric board and a microstrip line disposed on a side of the second dielectric board close to the coupling board.

[0023] A coupling slot is defined in the coupling board, and a positive projection of the coupling slot on the second dielectric board intersects a positive projection of the microstrip line on the second dielectric board.

[0024] Optionally, one end of the microstrip line is adjacent to a first side edge of the second dielectric board, and the positive projection of the coupling slot on the second dielectric board divides the positive projection of the microstrip line on the second dielectric board into a first part facing away from the first side edge and a second part close to the first side edge; wherein, the length of the first part is 10 mm - 25 mm.

[0025] In a second aspect, the present disclosure provides a communication device, characterized in that it includes the antenna structure according to any one of the above. Description of the Drawings

[0026] The drawings are used to provide a further understanding of the present disclosure, and constitute a part of the specification, and are used to explain the present disclosure together with the following specific embodiments, but do not constitute a limitation to the present disclosure. In the drawings:

[0027] Figure 1 is a schematic structural diagram of a first dielectric board and a radiation patch disposed on the first dielectric board in an embodiment of the present disclosure;

[0028] Figure 2 is a top view of an embodiment of the present disclosure in which a slot is provided on the radiation patch;

[0029] Figure 3 is another top view of an embodiment of the present disclosure in which a slot is provided on the radiation patch;

[0030] Figure 4 is yet another top view of an embodiment of the present disclosure in which a slot is provided on the radiation patch;

[0031] Figure 5 is still another top view of an embodiment of the present disclosure in which a slot is provided on the radiation patch;

[0032] Figure 6 is a top view of an embodiment of the present disclosure in which a resonant ring is provided on the first dielectric board;

[0033] Figure 7 is another top view of an embodiment of the present disclosure in which a resonant ring is provided on the first dielectric board;

[0034] Figure 8 is yet another top view of an embodiment of the present disclosure in which a resonant ring is provided on the first dielectric board;

[0035] Figure 9 Top view of setting a resonant ring on a first dielectric plate and setting a slot on a radiation patch according to an embodiment of the present disclosure;

[0036] Figure 10 Another top view of setting a resonant ring on a first dielectric plate and setting a slot on a radiation patch according to an embodiment of the present disclosure;

[0037] Figure 11 Another top view of setting a resonant ring on a first dielectric plate and setting a slot on a radiation patch according to an embodiment of the present disclosure;

[0038] Figure 12 Another top view of setting a resonant ring on a first dielectric plate and setting a slot on a radiation patch according to an embodiment of the present disclosure;

[0039] Figure 13 Overall schematic diagram of the antenna structure provided by an embodiment of the present disclosure;

[0040] Figure 14 Schematic diagram of the positional relationship of the orthographic projection of a microstrip line and a coupling slot on a second dielectric plate;

[0041] Figure 15 According to Figure 8 Simulation result diagram of the antenna structure designed according to the shown structure;

[0042] Figure 16 According to Figure 3 Simulation result diagram of the antenna structure designed according to the shown structure;

[0043] Figure 17 According to Figure 9 Simulation result diagram of the antenna structure designed according to the shown structure;

[0044] Figure 18 According to Figure 10 Simulation result diagram of the antenna structure designed according to the shown structure.

[0045] 1. Radiation patch 2. First dielectric plate 3. Slot

[0046] 101. First edge 102. Second edge 103. Third edge

[0047] 104. Fourth edge 105. Fifth edge 106. Sixth edge

[0048] 301. First strip portion 302. Second strip portion

[0049] 4. Resonant ring 5. Feeding plate 6. Coupling plate

[0050] 7. Spacing area

[0051] 501, First side 502, Microstrip line 503, Second dielectric plate

[0052] 601, Coupling slot 5021, First part 5022, Second part Detailed implementation manners

[0053] The following will describe in detail the specific implementation manners of the present disclosure with reference to the accompanying drawings. It should be understood that the specific implementation manners described herein are only for the purpose of illustration and explanation of the present disclosure, and are not used to limit the present disclosure.

[0054] To make the objectives, technical solutions and advantages of the embodiments of the present disclosure clearer, the technical solutions of the embodiments of the present disclosure will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present disclosure. Obviously, the described embodiments are only a part of the embodiments of the present disclosure, rather than all of the embodiments. Based on the described embodiments of the present disclosure, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the scope of protection of the present disclosure.

[0055] Unless otherwise defined, the technical terms or scientific terms used in the embodiments of the present disclosure shall have the ordinary meaning as understood by those of ordinary skill in the art to which the present disclosure pertains. The "first", "second" and similar terms used in the present disclosure do not denote any order, quantity or importance, but are only used to distinguish different components. Similarly, words such as "include" or "comprise" mean that the elements or items appearing before this word cover the elements or items listed after this word and their equivalents, without excluding other elements or items. "Connection" or "connected" and similar terms are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. "Upper", "lower", "left", "right", etc. are only used to represent relative positional relationships, and when the absolute position of the object being described changes, the relative positional relationship may also change accordingly.

[0056] As used herein, "parallel" and "perpendicular" include the described situations and situations similar to the described situations, and the range of the similar situations is within an acceptable deviation range, where the acceptable deviation range is determined by those of ordinary skill in the art considering the measurements being discussed and the errors associated with the measurements of specific quantities (i.e., the limitations of the measurement system). For example, "parallel" includes absolute parallel and approximate parallel, where the acceptable deviation range for approximate parallel may be, for example, within 5° deviation; "perpendicular" includes absolute perpendicular and approximate perpendicular, where the acceptable deviation range for approximate perpendicular may also be, for example, within 5° deviation.

[0057] It should be understood that when a layer or element is referred to as being on another layer or substrate, it can be directly on the other layer or substrate, or there can be an intermediate layer between the layer or element and the other layer or substrate.

[0058] Exemplary embodiments are described herein with reference to cross-sectional views and / or plan views that are idealized exemplary drawings. In the drawings, the thickness of layers and regions is exaggerated for clarity. Thus, variations in the shape relative to the drawings due to, for example, manufacturing techniques and / or tolerances are contemplated. Accordingly, the exemplary embodiments should not be construed as being limited to the shapes of the regions shown herein, but include shape deviations caused, for example, by manufacturing. Thus, the regions shown in the drawings are schematic in nature, and their shapes are not intended to show the actual shape of the regions of the device and are not intended to limit the scope of the exemplary embodiments.

[0059] Microstrip patch antennas have the advantages of low profile and easy integration with monolithic microwave integrated circuits (MMICs). Therefore, the design of microstrip patch antennas has received increasing attention. When designing a microstrip patch antenna, in order to avoid polarization mismatch and path fading problems generated during signal transmission and reception and ensure the stability of signal transmission, it is an urgent problem to design an antenna structure with circular polarization (CP) characteristics. Currently, in order to achieve circular polarization, the structure of microstrip patch antennas is relatively complex, and it is difficult to control the number of operating frequency points.

[0060] For this reason, the present disclosure designs an antenna structure with adjustable circular polarization bandwidth, multi-frequency operation characteristics, and a simple structure. The antenna structure of the present disclosure realizes the reconfigurability of the circular polarization bandwidth and the operating frequency band by designing slots on the radiation patch 1 and / or arranging a resonant ring around the radiation patch 1 on the first dielectric plate 2. The antenna structure of the present disclosure can greatly extend the application scenarios of patch antennas and can be applied in fields such as RFID and satellite communication.

[0061] Specifically, to achieve the above object, in a first aspect, an embodiment of the present disclosure provides an antenna structure, including a first dielectric plate 2 and a radiation patch 1 disposed on the first dielectric plate. The first dielectric plate 2 and the radiation patch 1 disposed on the first dielectric plate, the schematic structural diagram thereof is as Figure 1As shown, where the left side is the top view and the right side is the side view. The radiation patch 1 is a square structure with two chamfered corners arranged oppositely. Specifically, the radiation patch 1 has a first edge 101, a second edge 102, a third edge 103, a fourth edge 104, a fifth edge 105, and a sixth edge 106. The first edge 101 is arranged oppositely to the fourth edge 104, the fifth edge 105 is arranged oppositely to the second edge 102. The first edge 101 is connected to the fifth edge 105 through the sixth edge 106, and the second edge 102 is connected to the fourth edge 104 through the third edge 103. The third edge 103 forms an obtuse angle with both the second edge 102 and the fourth edge 104, and the sixth edge 106 forms an obtuse angle with both the first edge 101 and the fifth edge 105.

[0062] In some embodiments, a slot 3 penetrating the radiation patch 1 is provided on the radiation patch 1. By providing the slot 3 on the radiation patch 1, the multi-frequency characteristics of the antenna structure can be realized. Moreover, by adjusting the structural dimensions of the slot 3, the multi-frequency positions and circular polarization bandwidth of the antenna structure can be regulated. At the same time, the structure of the antenna structure is simple, solving the technical problem that the circular polarization characteristics of the microstrip antenna are incompatible with the simple structure, and the cost of the antenna structure can also be reduced.

[0063] Optionally, the material of the radiation patch 1 is metal, and the material of the first dielectric plate 2 is RF4 (fiberglass).

[0064] Optionally, the lengths of the first edge 101, the second edge 102, the fourth edge 104, and the fifth edge 105 are equal, and the lengths of the third edge 103 and the sixth edge 106 are equal.

[0065] Optionally, as Figure 3 shown, the included angle between the first edge 101 and the second edge 102, and the included angle between the fourth edge 104 and the fifth edge 105 are both 90°.

[0066] Optionally, as Figure 3 shown, the included angles between the third edge 103 and the second edge 102 and the fourth edge 104, and the included angles between the sixth edge 106 and the first edge 101 and the fifth edge 105 are both 135°.

[0067] Optionally, as Figure 3As shown, the ratio of the width d_slot of the slot 3 to the distance L_p from the first edge 101 to the fourth edge 104 is between 0.01 and 0.07. For example, the distance L_p between the first edge 101 and the fourth edge 104 of the radiation patch 1 and the distance between the second edge 102 and the fifth edge 105 are both 58 mm - 61 mm. For example, the distance between the first edge 101 and the fourth edge 104 of the radiation patch 1 and the distance between the second edge 102 and the fifth edge 105 can both be 58 mm, or 59 mm, or 60 mm, or 60.1 mm, or 60.2 mm, or 60.3 mm, or 60.4 mm, or 60.5 mm, or 60.5 mm, or 60.6 mm, 60.7 mm, 60.8 mm, 60.9 mm, or 61 mm. The width d_slot of the slot 3 is 1 mm - 4 mm. For example, the width d_slot of the slot 3 can be 1 mm, 2 mm, 3 mm or 4 mm.

[0068] Optionally, the lengths of the four sides of the first dielectric plate 2 can all be 120 mm - 130 mm. For example, the lengths of the four sides of the first dielectric plate 2 can be 120 mm, or 125 mm, or 130 mm.

[0069] Optionally, the thickness of the first dielectric plate 2 is 1 mm - 2 mm. For example, the thickness of the first dielectric plate 2 is 1 mm, or 1.2 mm, or 1.4 mm, or 1.6 mm, or 1.8 mm, or 2 mm.

[0070] Optionally, as Figure 2 and 3 shown, the slot 3 can be set such that its orthographic projection on the first dielectric plate 2 is a circular ring or a rectangular ring, where Figure 2 in [reference] the orthographic projection of the slot 3 on the first dielectric plate 2 is a circular ring; Figure 3 in [reference] the orthographic projection of the slot 3 on the first dielectric plate 2 is a rectangular ring. Optionally, the center of the circular ring or the rectangular ring coincides with the center of the radiation patch 1.

[0071] Optionally, the ring width of the circular ring and the inner diameter or outer diameter of the circular ring can be set according to actual needs.

[0072] Optionally, each side outside the rectangular ring is respectively parallel to the first edge 101, the second edge 102, the fourth edge 104 and the fifth edge 105.

[0073] Optionally, as Figure 3As shown, the ratio of the length L_slot of each side on the outer side of the rectangular loop to the distance L_p from the first edge 101 to the fourth edge 104 of the radiation patch 1 is 0.45 - 0.55. For example, the distance between the first edge 101 and the fourth edge 104 is 58 mm - 61 mm, and the length L_slot of each side on the outer side of the rectangular loop can be set to 29 mm - 32 mm, which is beneficial for the antenna structure to exhibit excellent multi-frequency circular polarization working characteristics. For example, the lengths of each side on the outer side of the rectangular loop are equal, and are 29 mm, or 30 mm, or 31 mm, or 32 mm respectively.

[0074] Optionally, as Figure 4 and Figure 5 shown, the slot 3 can also adopt a "cross-shaped" design. The "cross-shaped" slot can be set to include a first strip portion 301 and a second strip portion 302 that intersect each other. Optionally, the first strip portion 301 and the second strip portion 302 are respectively parallel to the first edge 101 and the second edge 102. Or, the first strip portion 301 is parallel to the third edge 103 and the second strip portion 302 is perpendicular to the third edge 103.

[0075] As Figure 4 shown, it is a top view of the slot 3 opened on the radiation patch in the embodiment of the present disclosure. Among them, the first strip portion 301 is parallel to the second edge 102 of the radiation patch 1, and the second strip portion 302 is parallel to the first edge 101 of the radiation patch 1.

[0076] As Figure 5 shown, it is a top view of the slot provided on the radiation patch in the embodiment of the present disclosure. Among them, the first strip portion 301 is parallel to the third edge 103 of the radiation patch 1 and the second strip portion 302 is perpendicular to the third edge 103 of the radiation patch 1.

[0077] Optionally, the lengths of the first strip portion 301 and the second strip portion 302 can be set according to actual needs.

[0078] Optionally, the center of the "cross-shaped" slot coincides with the center of the radiation patch 1.

[0079] In the embodiment of the present disclosure, by setting the "cross-shaped" slot, the impedance matching of the antenna structure can be designed diversely, and multi-frequency circular polarization characteristics can be achieved through different structures such as the position, slot width of the "cross-shaped", and the lengths of the two slots where the "cross-shaped" intersects, so as to achieve higher working efficiency. In addition, this design greatly expands the design freedom of the antenna structure. For different frequency band ranges and resonance point requirements, it can be achieved by adjusting the slot structure, and the antenna performance is maintained without deterioration while ensuring the multi-frequency circular polarization performance.

[0080] In the above embodiments, the structural parameters of the slot 3, for example, include but are not limited to the lengths of the sides of the outer rectangle when its orthographic projection on the first dielectric plate 2 is a rectangular ring slot, the ring width and the inner or outer diameter of the ring when its orthographic projection on the first dielectric plate 2 is a circular ring, the lengths of the first strip portion 301 and the second strip portion 302 that cross each other in the "cross-shaped" slot, and the slot width of the slot, etc. The resonant frequency point position and resonant strength of the antenna structure can be adjusted.

[0081] In some other embodiments, as Figures 6 - 8 shown, the antenna structure further includes a resonant ring 4 disposed on the first dielectric plate 2 and surrounding the radiation patch 1; there is a spacer region 7 between the inner side of the resonant ring 4 and the radiation patch 1, and the spacer region 7 surrounds the radiation patch 1.

[0082] Designing the structure of the resonant ring 4 for the antenna structure can achieve the multi-frequency characteristics of the antenna structure. Adjusting the structural parameters of the resonant ring 4, including but not limited to the shape of the resonant ring 4, the ring width of the resonant ring 4, the width of the spacer region 7, and the inner or outer diameter of the resonant ring 4, etc., can further form new resonant points for the antenna structure and improve the working performance of the antenna structure.

[0083] Optionally, the material of the resonant ring 4 is metal. Further optionally, the material of the resonant ring 4 is the same metal as the radiation patch 1.

[0084] Optionally, as Figure 6 shown, the orthographic projection shape of the resonant ring 4 on the first dielectric plate 2 can be a circular ring. Or, as Figure 7 shown, the orthographic projection shape of the resonant ring 4 on the first dielectric plate 2 can be a square ring.

[0085] Optionally, as Figure 8 shown, the shapes of the inner edge and the outer edge of the orthographic projection of the resonant ring 4 on the first dielectric plate 2 are the same as the shape of the radiation patch 1.

[0086] Optionally, the center of the resonant ring 4 coincides with the center of the radiation patch 1.

[0087] Optionally, the width of the spacer region 7 is 0.25 - 0.35 times the distance L_p from the first edge 101 to the fourth edge 104 of the radiation patch 1. For example, the distance L_p between the first edge 101 and the fourth edge 104 is 58 mm - 61 mm, and the width of the spacer region 7 is set to 16 mm - 20 mm. For example, the width of the spacer region 7 can be 16 mm, or 17 mm, or 18 mm, or 20 mm.

[0088] Optionally, the width of the resonant loop 4 is 0.15 - 0.23 times the distance L_p between the first edge 101 and the fourth edge 104 of the radiating patch 1. For example, the distance between the first edge 101 and the fourth edge 104 is 58 mm - 61 mm, and the width of the resonant loop 4 is 8 mm - 15 mm. For example, the width of the resonant loop 4 is 10 mm - 13 mm. For example, the width of the resonant loop 4 can be 8 mm, or 9 mm, or 10 mm, or 11 mm, or 12 mm, or 13 mm, or 14 mm, or 15 mm.

[0089] Optionally, as Figure 8 shown, both the maximum width L1 in the first direction and the maximum width L2 in the second direction of the resonant loop 4 are 90 mm - 125 mm. For example, both the maximum width L1 in the first direction and the maximum width L2 in the second direction of the resonant loop 4 are 115 mm - 125 mm. For example, both the maximum width L1 in the first direction and the maximum width L2 in the second direction of the resonant loop 4 can be 90 mm, or 100 mm, or 110 mm, or 111 mm, or 112 mm, or 113 mm, or 114 mm, or 115 mm, or 116 mm, or 117 mm, or 118 mm, or 119 mm, or 120 mm, or 121 mm, or 122 mm, or 123 mm, or 124 mm, or 125 mm; wherein, the first direction is the arrangement direction of the first edge 101 and the fourth edge 104, and the second direction is the arrangement direction of the second edge 102 and the fifth edge 105.

[0090] In the above embodiments, the shape of the orthographic projection of the resonant loop 4 on the first dielectric plate 2, as well as the settings of parameters such as, but not limited to, the width of the spacer region 7, the maximum widths L1 and L2, and the width of the resonant loop 4, can adjust the number of resonant points of the antenna structure.

[0091] In some other embodiments, the antenna structure further includes a resonant loop 4 disposed on the first dielectric plate 2 and surrounding the radiating patch 1; meanwhile, a slot 3 penetrating the radiating patch 1 is provided on the radiating patch 1.

[0092] In the embodiments of the present disclosure, the design of simultaneously setting the resonant loop 4 and making the slot 3 for the antenna structure can achieve the multi - frequency characteristics and excellent circular polarization characteristics of the antenna structure. This design greatly improves the versatility of the antenna and can better meet the requirements of actual application scenarios.

[0093] In some embodiments, as Figures 9 - 12 shown, it is a top view of the antenna structure with the resonant loop 4 and the slot 3 designed simultaneously, wherein, Figures 9 - 12The shapes of the inner edge and the outer edge of the orthographic projection of the resonant loop 4 on the first dielectric plate 2 are the same as the shape of the radiation patch 1, and the centers of both the resonant loop 4 and the slot 3 coincide with the center of the radiation patch 1. Figure 9 The orthographic projection of the slot 3 on the first dielectric plate 2 is a rectangular ring. Figure 10 The orthographic projection of the slot 3 on the first dielectric plate 2 is a circular ring. Figure 11 The slot 3 includes a first strip portion 301 and a second strip portion 302, and the first strip portion 301 and the second strip portion 302 are respectively parallel to the first edge 101 and the second edge 102 of the radiation patch 1. Figure 12 The slot 3 includes a first strip portion 301 and a second strip portion 302, the first strip portion 301 is parallel to the third edge 103 of the radiation patch 1 and the second strip portion 302 is perpendicular to the third edge 103 of the radiation patch 1.

[0094] In some embodiments, as Figure 9 shown, the lengths of the four sides of the first dielectric plate 2 are 125 mm, the thickness of the first dielectric plate 2 is 1.6 mm, the distance between the first edge 101 and the fourth edge 104 of the radiation patch 1 is 60 mm, the distance between the second edge 102 and the fifth edge 105 of the radiation patch 1 is 60.1 mm, the slot width of the slot 3 on the radiation patch 1 is 3 mm, the slot 3 is a rectangular ring, and the distance between two opposite sides among the outer edges of the orthographic projection of the slot 3 on the first dielectric plate 2 is 30 mm, the ring width of the resonant loop 4 is 12 mm, and the maximum width L1 in the first direction and the maximum width L2 in the second direction of the resonant loop 4 are 120 mm. In some other embodiments, as Figure 13 shown, the antenna structure further includes a feeding plate 5 and a coupling plate 6. The feeding plate 5 is disposed on the side of the first dielectric plate 2 away from the radiation patch 1 for transmitting antenna signals; the coupling plate 6 is disposed between the first dielectric plate 2 and the feeding plate 5 for coupling the antenna signals on the feeding plate 5 to the radiation patch 1.

[0095] Optionally, the thickness and material of the coupling plate 6 are the same as those of the first dielectric plate 1, and it is made of RF4 material.

[0096] In some embodiments, the feeding plate 5 includes a second dielectric plate 503 and a microstrip line 502 disposed on the side of the second dielectric plate 503 close to the coupling plate 6. A coupling slit 601 is formed on the coupling plate 6, and the orthographic projection of the coupling slit 601 on the second dielectric plate 503 intersects with the orthographic projection of the microstrip line 502 on the second dielectric plate 503.

[0097] Figure 14 It is a schematic diagram of the positional relationship between the microstrip line 502 and the orthographic projection of the coupling slit 601 on the second dielectric plate 503. In some embodiments, as Figure 14As shown, one end of the microstrip line 502 is adjacent to the first side 501 of the second dielectric plate 503. The positive projection of the coupling slot 601 on the second dielectric plate 503 divides the positive projection of the microstrip line 502 on the second dielectric plate 503 into a first part 5021 away from the first side 501 and a second part 5022 close to the first side 501.

[0098] Optionally, the length of the first part 5021 is 10 mm - 25 mm. For example, the length of the first part 5021 can be 10 mm, or 12 mm, or 14 mm, or 15 mm, or 17 mm, or 19 mm, or 20 mm, or 24 mm, or 25 mm.

[0099] The technical solution of the present disclosure will be further described below in combination with the specific working performance of the antenna structure.

[0100] In some embodiments, the resonant loop 4 and the radiation patch 1 of the antenna structure are designed as Figure 8 shown, wherein the loop width of the resonant loop 4 can be 8 mm - 15 mm, and the maximum width L1 of the resonant loop 4 in the first direction and the maximum width L2 in the second direction can be 90 mm - 120 mm. The antenna structure is subjected to S11 (operating frequency band / bandwidth) simulation test, and the simulation results are as Figure 15 shown by the curves a) and b) in. In the figure, the S11 parameter is one of the antenna S parameters (Scatter parameters, i.e., scattering parameters), representing the echo loss characteristic. The axial ratio is an important performance parameter of a circularly polarized antenna, representing the purity of circular polarization. The bandwidth with an axial ratio not greater than 3 dB is defined as the circular polarization bandwidth of the antenna, or also called 3 dB axial - ratio beamwidth (ARBW).

[0101] From Figure 15 curve a) in, it can be seen that 4 resonant points are formed in the range of 2.25 - 4 GHz, and effective resonant points (with S11 < -10 dB) appear at 2.3 GHz and 3.4 GHz, which indicates that designing the structure of the resonant loop 4 can improve the working characteristics of the patch antenna structure. From Figure 15 curve b) in, it can be seen that the patch antenna structure provided with the resonant loop 4 structure has good working characteristics at multiple frequency points. The results show that setting the resonant loop 4 and adjusting the structural parameters of the resonant loop 4 can further form new resonant points, thereby improving the working performance of the antenna.

[0102] In some other embodiments, the slot 3 provided on the radiation patch 1 of the antenna structure is as Figure 3 shown, wherein the widths (d_slot values) of the slot 3 are respectively set to 1 mm, 2 mm, 3 mm, and 4 mm. The antenna structure is subjected to S11 (operating frequency band / bandwidth) simulation test, and the simulation results are asFigure 16 As shown in the curves a)-d) in FIG.

[0103] Among them, from Figure 16 It can be seen from b), c), and d) in that when d_slot = 1mm, 2mm, or 4mm, the S11 curve has two effective resonance points at around 3.2GHz and 3.9GHz, and when d_slot = 3mm, a new effective resonance point appears at 3.6GHz, that is, d_slot = 3mm can achieve three effective resonance points. Obviously, the width of the slot 3 is 3mm, which has the best multi-frequency working characteristics. Therefore, in practical applications, the width of the slot 3 can be preferably set to 3mm.

[0104] In some other embodiments, the resonant ring 4 of the antenna structure and the slot 3 of the radiation patch 1 are arranged as follows: Figure 9 The design is shown in the figure. Meanwhile, the specific structural parameters are set as follows: the slot width of the slot 3 is mm, the ring width of the resonant ring 4 is 12 mm, the distance between the first edge 101 and the fourth edge 104, and the distance between the second edge 102 and the fifth edge 105 are both set to 60 mm, and the maximum width of the resonant ring 4 in the first direction and the maximum width in the second direction are set to 120 mm; the simulation results are shown in FIG. Figure 17 As shown in the a) and b) curves.

[0105] Depend on Figure 17 From the analysis of a) and b), it can be seen that the S11 curve of the antenna structure of the embodiment of the present invention has good resonance characteristics in the three frequency bands of 3.11GHz-3.14GHz, 3.48GHz-3.52GHz and 3.78GHz-3.84GHz. At the same time, it shows good circular polarization characteristics (axial ratio AR<3dB) at 3.781GHz-3.845GHz, which indicates that the antenna structure has excellent circular polarization characteristics within the effective resonance frequency band.

[0106] In some other embodiments, the resonant ring 4 of the antenna structure and the slot 3 of the radiation patch 1 are arranged as follows: Figure 10 The design is shown in the figure. Meanwhile, the specific structural parameters are set as follows: the width of the circular slot is 1.5 mm, the length of the first part (X_f) away from the first edge is 14 mm to 20 mm, and the positive projection of the coupling slot on the second dielectric plate divides the positive projection of the microstrip line on the second dielectric plate into two parts. The simulation results are shown in the figure below. Figure 18 As shown in the curves a)-d) in FIG.

[0107] Among them, when X_f = 14 mm, the antenna structure has good operating characteristics in four frequency bands. When X_f is in the range of 14 mm - 16 mm, the antenna structure has good operating frequency points in four bands. When X_f = 17 mm - 20 mm, the antenna structure has wide operating frequency band characteristics. Obviously, the design in the embodiments of the present disclosure can meet different performance requirements in practical applications and can enable the same antenna structure to operate at multiple frequency points simultaneously.

[0108] As can be seen from the above-disclosed embodiments, the antenna structure with the resonant ring 4 and the slot 3 provided on the radiation patch 1 exhibits excellent multi-frequency circular polarization operating characteristics, and the versatility of the antenna is greatly improved. Different settings of the shapes and related parameters of the resonant ring 4 and the slot 3 can meet the requirements of more practical application scenarios.

[0109] In summary, the present disclosure designs an antenna structure, including: providing a slot on the radiation patch and / or adding a resonant ring around the radiation patch, and optimizing the structural dimensions of the slot and / or the resonant ring, etc., to improve the S11 operating bandwidth and circular polarization bandwidth of the antenna structure, and realizing multi-band and circular polarization adjustable operating performance. At the same time, the antenna structure of the present disclosure is simple, has an extremely low profile, and has simple processing requirements, and also solves the technical problem of incompatibility between the circular polarization characteristics of the antenna structure and the simple structure, and to a certain extent reduces the processing cost of high-performance antenna structures.

[0110] The present disclosure also provides a communication device, including any one of the antenna structures provided in the above embodiments of the present disclosure.

[0111] It can be understood that the above embodiments are merely exemplary embodiments adopted to illustrate the principle of the present disclosure, and the present disclosure is not limited thereto. For those of ordinary skill in the art, various modifications and improvements can be made without departing from the spirit and essence of the present disclosure, and these modifications and improvements are also regarded as the protection scope of the present disclosure.

Claims

1. An antenna structure, comprising a first dielectric plate and a radiation patch disposed on the first dielectric plate; the radiation patch has a first edge, a second edge, a third edge, a fourth edge, a fifth edge and a sixth edge, the first edge is disposed opposite to the fourth edge, the fifth edge is disposed opposite to the second edge, the first edge is connected to the fifth edge through the sixth edge, the second edge is connected to the fourth edge through the third edge, the third edge forms an obtuse angle with both the second edge and the fourth edge, and the sixth edge forms an obtuse angle with both the first edge and the fifth edge; characterized in that, a slot penetrating the radiation patch is disposed on the radiation patch, and the slot is used for adjusting the resonant frequency point position and resonant strength of the antenna structure; and / or, the antenna structure further comprises a resonant ring disposed on the first dielectric plate and surrounding the radiation patch; the resonant ring is used for adjusting the number of resonant points of the antenna structure.

2. The antenna structure according to claim 1, wherein, The inner edge and outer edge shapes of the orthographic projection of the resonant ring on the first dielectric plate are the same as the shape of the radiation patch.

3. The antenna structure according to claim 2, characterized in that, The maximum width of the resonant ring in the first direction and the maximum width in the second direction are both 90 mm - 125 mm, the first direction is the arrangement direction of the first edge and the fourth edge, and the second direction is the arrangement direction of the second edge and the fifth edge.

4. The antenna structure according to any one of claims 1 to 3, characterized in that The antenna structure comprises a resonant ring; there is a spacer region between the resonant ring and the radiation patch, the spacer region surrounds the radiation patch, and the width of the spacer region is 16 mm - 20 mm.

5. The antenna structure according to any one of claims 1 to 3, characterized in that, The antenna structure comprises a resonant ring; the ring width of the resonant ring is 8 mm - 15 mm.

6. The antenna structure according to any one of claims 1 to 3, characterized in that, A slot is disposed on the radiation patch, and the width of the slot is 1 mm - 4 mm.

7. The antenna structure according to any one of claims 1 to 3, characterized in that, A slot is disposed on the radiation patch; the orthographic projection of the slot on the first dielectric plate is a rectangular ring, and each side outside the rectangular ring is respectively parallel to the first edge, the second edge, the fourth edge and the fifth edge.

8. The antenna structure according to claim 7, characterized in that, The lengths of each side outside the rectangular ring are all 29 mm - 32 mm.

9. The antenna structure according to any one of claims 1 to 3, characterized in that, A slot is disposed on the radiation patch; the slot comprises a first strip portion and a second strip portion that intersect each other; the first strip portion is parallel to the first edge and the second strip portion is parallel to the second edge; or, the first strip portion is parallel to the third edge and the second strip portion is perpendicular to the third edge.

10. The antenna structure according to any one of claims 1 to 3, characterized in that, A slot is disposed on the radiation patch; the orthographic projection of the slot on the first dielectric plate is a circular ring.

11. The antenna structure according to any one of claims 1 to 3, characterized in that, The distance between the first edge and the fourth edge and the distance between the second edge and the fifth edge are both 58 mm - 61 mm.

12. The antenna structure according to any one of claims 1 to 3, characterized in that, The antenna structure further comprises: a feeding plate disposed on the side of the first dielectric plate away from the radiation patch for transmitting antenna signals; a coupling plate disposed between the first dielectric plate and the feeding plate for coupling the antenna signals on the feeding plate to the radiation patch.

13. The antenna structure according to claim 12, wherein The feeding board includes a second dielectric board and a microstrip line disposed on a side of the second dielectric board close to the coupling board. A coupling slot is formed on the coupling board, and a positive projection of the coupling slot on the second dielectric board intersects a positive projection of the microstrip line on the second dielectric board.

14. The antenna structure according to claim 13, wherein One end of the microstrip line is adjacent to a first side edge of the second dielectric board, and the positive projection of the coupling slot on the second dielectric board divides the positive projection of the microstrip line on the second dielectric board into a first part facing away from the first side edge and a second part close to the first side edge; wherein, the length of the first part is 10 mm - 25 mm.

15. A communication device, characterized in that, It includes the antenna structure according to any one of claims 1 to 14.

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