Wideband UWB antenna

Abstract

The utility model discloses a broadband UWB antenna, comprising a dielectric substrate, the front surface of the dielectric substrate is provided with a microstrip feeder line, guiders and a circular radiation main body, the radiation main body is connected with the microstrip feeder line, two sides of the radiation main body are respectively provided with the guiders, the radiation main body is provided with an S groove, and the S groove is provided with a slot. And a ground layer is arranged on the back surface of the dielectric substrate. The broadband UWB antenna can be formed by adopting a circuit board processing technology, and compared with an LCP and MPI material stacking structure, the UWB antenna has the advantages of wide bandwidth and lower manufacturing cost. In the broadband UWB antenna, the S slot on the radiation main body can expand the bandwidth, and the guider can increase the resonance depth, so that the UWB antenna has more excellent performance.

Description

Technical Field

[0001] The utility model relates to the technical field of antennas, in particular to a broadband UWB antenna. Background Art

[0002] UWB is an ultra-wideband wireless transmission technology and one of the key technologies supporting IoT links. Currently, UWB technology and equipment are rapidly becoming popular and gradually being applied to our daily lives, with increasing applications in smartphones, smart home devices, automobiles, and the IoT. Ultra-wideband antennas were born with the popularization of UWB technology, and people's demand for them is mainly that the bandwidth is wide enough to stably radiate strong interference signals. The current difficulty in UWB antenna design is to achieve coverage of multiple frequency bands and to achieve wide beam coverage while being miniaturized.

[0003] UWB antennas are widely used in consumer electronics. Existing UWB antennas are mostly made of stacked LCP and MPI materials, which are complex to manufacture and have high costs. LCP and MPI materials and the antenna stacking structure have led to the cost and bandwidth limitations of current UWB antennas. LCP and MPI materials are more expensive than traditional FR4. As costs increase, the thicker the stacking structure, the wider the bandwidth of the UWB antenna. Products designed in a way that increases thickness and cost are bound to be eliminated by the market in terms of price. Utility Model Content

[0004] The technical problem solved by the utility model is to provide a low-cost broadband UWB antenna.

[0005] In order to solve the above technical problems, the technical solution adopted by the utility model is: a broadband UWB antenna, including a dielectric substrate, a microstrip feed line, a guide and a circular radiating body are provided on the front side of the dielectric substrate, the radiating body is connected to the microstrip feed line, the guides are respectively provided on both sides of the radiating body, the radiating body is provided with an S-groove, and a ground layer is provided on the back side of the dielectric substrate.

[0006] In one embodiment, the guides located on both sides of the radiation body are arranged opposite to each other.

[0007] In one embodiment, the guide is in an arc shape as a whole.

[0008] In one embodiment, the guides located on both sides of the radiation body are located on a virtual ring that is co-centered with the radiation body.

[0009] In one embodiment, the S groove includes a first groove, a second groove, a third groove, a fourth groove and a fifth groove connected in sequence, the first groove, the third groove and the fifth groove are parallel, the second groove and the fourth groove are parallel and perpendicular to the third groove respectively.

[0010] In one embodiment, the S-slot is located at the center of the radiation body.

[0011] In one embodiment, the stratum includes an isosceles trapezoidal portion and a rectangular portion that are connected, and the long base of the isosceles trapezoidal portion is connected to the long side of the rectangular portion and the two have the same length.

[0012] In one embodiment, the radiation body, the guide and the microstrip feed line are formed by LDS process.

[0013] In one embodiment, the radiation body, the guide and the microstrip feeding line are formed by an etching process.

[0014] In one embodiment, the radiation body, the guide and the microstrip feeding line are formed by patch processing.

[0015] The beneficial effects of the utility model are:

[0016] The broadband UWB antenna can be formed by a circuit board processing technology. Compared with the LCP and MPI material stacking structure, the UWB antenna has a wider bandwidth and a lower manufacturing cost.

[0017] In this broadband UWB antenna, the S-slot on the radiating body can widen the bandwidth, and the director can increase the resonance depth, thereby allowing the UWB antenna to have better performance. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying creative work.

[0019] Figure 1 The structure of the broadband UWB antenna of this embodiment is shown in FIG. Figure 1 ;

[0020] Figure 2 The structure of the broadband UWB antenna of this embodiment is shown in FIG. Figure 2 ;

[0021] Figure 3 is a perspective view of the broadband UWB antenna of this embodiment when viewed from the front;

[0022] Figure 4 is a comparison diagram of the return loss of the broadband UWB antenna of this embodiment;

[0023] Figure 5is an antenna efficiency diagram of the broadband UWB antenna of this embodiment;

[0024] Figure 6 is the radiation pattern of the broadband UWB antenna of this embodiment at 2.5 GHz;

[0025] Figure 7 : is the radiation pattern of the broadband UWB antenna of this embodiment at 5.5 GHz.

[0026] Description of Figure Numbers:

[0027] 1. Dielectric substrate;

[0028] 2. Microstrip feeder;

[0029] 3. Guide;

[0030] 4. Radiation subject;

[0031] 5, S slot; 51, first slot; 52, second slot; 53, third slot; 54, fourth slot; 55, fifth slot;

[0032] 6. Stratum; 61. Isosceles trapezoidal portion; 62. Rectangular portion. DETAILED DESCRIPTION

[0033] The purpose, features and advantages of the present invention will be further described in conjunction with the embodiments and with reference to the accompanying drawings.

[0034] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0035] It should be noted that if the embodiments of the present invention involve directional indications such as up, down, left, right, front, back, etc., then the directional indications are only used to explain the relative position relationship, movement status, etc. between the components in a certain specific posture as shown in the accompanying drawings. If the specific posture changes, the directional indication will also change accordingly.

[0036] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the utility model, the descriptions of "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" or "second" may explicitly or implicitly include at least one of the features.

[0037] In addition, if the meaning of "and / or" appears in the full text is to include three parallel solutions, taking "and / or" as an example, it includes solutions, or solutions, or solutions that are satisfied at the same time. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the ability of ordinary technicians in this field to implement. When the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection required by this utility model.

[0038] In this application, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0039] Example

[0040] Please refer to Figures 1 to 7 An embodiment of the utility model is: a broadband UWB antenna, comprising a dielectric substrate 1, a microstrip feed line 2, a guide 3 and a circular radiating body 4 are provided on the front of the dielectric substrate 1, the radiating body 4 is connected to the microstrip feed line 2, the guides 3 are respectively provided on both sides of the radiating body 4, an S-groove 5 is provided on the radiating body 4, and a ground layer 6 is provided on the back of the dielectric substrate 1.

[0041] The dielectric substrate 1 is preferably made of FR4 material, which has the advantage of being inexpensive and is conducive to further reducing the manufacturing cost of the UWB antenna.

[0042] Specifically, the guides 3 located on both sides of the radiation body 4 are arranged opposite to each other, and the guide 3 is in an arc shape as a whole. More specifically, the guides 3 located on both sides of the radiation body 4 are located on a virtual ring that is co-centric with the radiation body 4. The virtual ring is an imaginary ring that does not actually exist and is only used to express the relative position relationship of the multiple guides 3 on the dielectric substrate 1.

[0043] In this embodiment, the S slot 5 includes a first slot 51, a second slot 52, a third slot 53, a fourth slot 54 and a fifth slot 55 which are connected in sequence, the first slot 51, the third slot 53 and the fifth slot 55 are parallel, the second slot 52 and the fourth slot 54 are parallel and respectively perpendicular to the third slot 53. Preferably, the S slot 5 is located at the center of the radiation body 4.

[0044] In this embodiment, the stratum 6 includes an isosceles trapezoidal portion 61 and a rectangular portion 62 connected to each other, the long bottom side of the isosceles trapezoidal portion 61 is connected to the long side of the rectangular portion 62 and the two are equal in length, and the isosceles trapezoidal portion 61 is located above the rectangular portion 62. It should be noted that in other embodiments, the stratum 6 may also be in other shapes, which may be set according to actual conditions.

[0045] In this embodiment, the radiation body 4, the guide 3 and the microstrip feed line 2 are formed by LDS process. In other embodiments, the radiation body 4, the guide 3 and the microstrip feed line 2 can also be formed by other processes such as patch process and etching process.

[0046] Figure 4 is a comparison diagram of the return loss of the broadband UWB antenna of this embodiment. Figure 4 It can be seen that before the introduction of the S-slot, the working bandwidth of the antenna below -10dB was 2.8GHz-6.7GHz. After the introduction of the S-slot, the working bandwidth of the antenna was increased to 8.5GHz. In order to further increase the resonance depth around 7GHz, a director was introduced. At this time, the resonance depth of the antenna was increased from -14dB to -18dB.

[0047] Figure 5 is the antenna efficiency diagram of the broadband UWB antenna of this embodiment, Figure 5 It can be seen that the antenna efficiency in all frequency bands is ≥-2db, the overall efficiency is good, and it meets the requirements of UWB antennas.

[0048] Figure 6 is the directional diagram of the broadband UWB antenna of this embodiment at 2.5 GHz, Figure 7 is the directional diagram of the broadband UWB antenna of this embodiment at 5.5 GHz, from Figure 6 and Figure 7 It can be seen that the radiation direction of this broadband UWB antenna is omnidirectional.

[0049] The above are only optional embodiments of the present invention, and do not limit the patent scope of the present invention. All equivalent structural changes made by using the contents of the present invention specification and drawings under the utility model concept, or directly / indirectly used in other related technical fields are included in the patent protection scope of the present invention.

Claims

1. A broadband UWB antenna, characterized in that: It comprises a dielectric substrate, wherein a microstrip feed line, a guide and a circular radiating body are arranged on the front of the dielectric substrate, the radiating body is connected to the microstrip feed line, the guides are arranged on both sides of the radiating body, an S-groove is arranged on the radiating body, and a ground layer is arranged on the back of the dielectric substrate.

2. The broadband UWB antenna according to claim 1, characterized in that: The guides located on both sides of the radiation body are arranged opposite to each other.

3. The broadband UWB antenna according to claim 2, characterized in that: The guide is in an arc shape as a whole.

4. The broadband UWB antenna according to claim 3, characterized in that: The guides located on both sides of the radiation body are located on a virtual circular ring that is co-centered with the radiation body.

5. The broadband UWB antenna according to claim 1, characterized in that: The S groove includes a first groove, a second groove, a third groove, a fourth groove and a fifth groove connected in sequence, the first groove, the third groove and the fifth groove are parallel, the second groove and the fourth groove are parallel and perpendicular to the third groove respectively.

6. The broadband UWB antenna according to claim 1, characterized in that: The S slot is located at the center of the radiation body.

7. The broadband UWB antenna according to claim 1, characterized in that: The stratum includes an isosceles trapezoidal portion and a rectangular portion which are connected. The long base of the isosceles trapezoidal portion is connected to the long side of the rectangular portion and the lengths of the two are equal.

8. The broadband UWB antenna according to claim 1, characterized in that: The radiation body, the guide and the microstrip feed line are formed by LDS process.

9. The broadband UWB antenna according to claim 1, characterized in that: The radiation body, the guide and the microstrip feeding line are formed by an etching process.

10. The broadband UWB antenna according to claim 1, characterized in that: The radiation body, the guide and the microstrip feed line are formed by patch technology.

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