UWB elliptical antenna

Abstract

The utility model discloses a UWB elliptical antenna, which relates to the technical field of antenna communication and comprises a dielectric substrate, the top of the dielectric substrate is provided with an elliptical ring combined feed source terminal, the bottom of the dielectric substrate is sequentially provided with a rectangular coplanar waveguide and a rectangular solder resist gap, and the inner bottom of the rectangular solder resist gap is uniformly provided with a plurality of grounding units. And the bottom end of the elliptical ring combined feed source terminal penetrates through the rectangular coplanar waveguide, the rectangular solder resist gap and one of the grounding units and is provided with an external microstrip line. The UWB elliptical antenna provided by the utility model can provide good antenna performance under the condition of limited volume and weight, the structure is simplified by simplifying the number of components and optimizing the design, meanwhile, the UWB elliptical antenna has the advantages of various installation modes and easiness in installation, and the design of the antenna optimizes the frequency band width, so that the antenna performance is improved. And meanwhile, good VSWR (Voltage Standing Wave Ratio), gain and phase characteristics are kept, so that the quality and reliability of wireless communication can be ensured.

Description

Technical Field

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

[0002] UWB (Ultra-Wideband) is a wireless communication technology that transmits data over a very wide frequency band (usually over 500MHz, or a total bandwidth over 20% of its center frequency), enabling it to provide high data transmission rates over a very short range. A key feature of UWB technology is that it uses very low power, so it causes very little interference to other wireless communication bands, which allows UWB to coexist with other wireless technologies while providing precise positioning and tracking capabilities in certain applications.

[0003] With the development of technology, the application of ultra-wideband communication technology has become increasingly widespread, especially in the application of mobile terminals and wearable devices. The design of broadband antennas faces more challenges than the design of traditional narrowband antennas. Ultra-wideband terminal devices are mostly portable handheld or wearable devices, so the antenna is required to have a planar structure and a small size, while also having good input matching and radiation characteristics. Conventional parameters that describe the performance of narrowband antennas, such as impedance matching, gain, polarization, etc., are no longer sufficient to fully describe ultra-wideband antennas. Ultra-wideband antennas must meet new technical requirements such as good fidelity of pulse waveforms and high radiation efficiency while meeting the requirements of their impedance bandwidth covering the specified frequency band range.

[0004] Existing ultra-wideband antennas can meet the technical requirements within the required frequency band, but they are large in size, heavy in weight and low in efficiency, which limits the application of ultra-wideband technology in small-volume handheld terminals or wearable devices.

[0005] Currently, no effective solution has been proposed for the problems in the related technologies. Utility Model Content

[0006] In view of the problems in the related art, the utility model proposes a UWB elliptical antenna to overcome the above technical problems existing in the existing related art.

[0007] To this end, the specific technical solutions adopted by the utility model are as follows:

[0008] A UWB elliptical antenna comprises a dielectric substrate, wherein an elliptical ring combination feed terminal is arranged on the top of the dielectric substrate, a rectangular coplanar waveguide and a rectangular solder resist gap are arranged in sequence on the bottom of the dielectric substrate, and a plurality of grounding units are evenly arranged on the inner bottom of the rectangular solder resist gap; the bottom end of the elliptical ring combination feed terminal penetrates the rectangular coplanar waveguide, the rectangular solder resist gap and one of the grounding units and is provided with an external microstrip line.

[0009] Furthermore, in order to meet the requirements of ultra-wideband antennas through precise size design of the antenna structure, the design of the ultra-wideband antenna can achieve wide bandwidth, good voltage standing wave ratio, flat gain and linear transfer function, and can be used as communication equipment antennas inside wireless terminals, outside wireless terminals, and ceiling or wall-mounted base stations to adapt to different installation environments and requirements, thereby improving the flexibility of the antenna. The length of one side of the dielectric substrate is 35mm and the width is 20mm. The dielectric constant of the dielectric substrate is 4.4, and the elliptical ring combined feed terminal The major axis of the end is 21.6mm, the minor axis is 12.0mm, and the copper thickness is 0.035mm; the width of the external microstrip line is 1.5mm, the length is 7mm, and the thickness is 0.035mm; the other side of the dielectric substrate is 35mm long, 7mm wide, and has a copper thickness of 0.035mm. The oil-coated width is 4.1mm, and the length of the grounding unit is 6.3mm and the height is 2.5mm; the dielectric substrate, rectangular coplanar waveguide, rectangular solder resist gap and grounding unit are all rectangular structures; the elliptical ring combination feed terminal is an elliptical structure.

[0010] The beneficial effects of the utility model are:

[0011] 1. The UWB elliptical antenna provided by the utility model can provide good antenna performance under limited volume and weight conditions. By reducing the number of components and optimizing the design, the structure is simplified. At the same time, it has the advantages of diverse installation methods and easy installation. The antenna design optimizes the bandwidth while maintaining good VSWR, gain and phase characteristics, thereby ensuring the quality and reliability of wireless communication.

[0012] 2. The UWB elliptical antenna provided by the utility model has the advantages of small size, light weight, simple structure, easy installation, low processing and production cost, excellent radio frequency parameters and compatibility with ultra-wideband working frequency bands. It can be used as a communication equipment antenna inside a wireless terminal, outside a wireless terminal, and as a ceiling-mounted or wall-mounted base station to adapt to different installation environments and requirements, thereby improving the flexibility of the antenna. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] 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 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 these drawings without paying creative work.

[0014] Figure 1 It is a structural schematic diagram of a UWB elliptical antenna according to an embodiment of the utility model;

[0015] Figure 2 It is a schematic diagram of assembling a UWB elliptical antenna according to an embodiment of the utility model;

[0016] Figure 3 It is a simulation diagram of antenna gain characteristics of a UWB elliptical antenna according to an embodiment of the utility model;

[0017] Figure 4 It is a schematic diagram of the installation of a UWB elliptical antenna according to an embodiment of the utility model.

[0018] In the figure:

[0019] 1. Dielectric substrate; 2. Elliptical ring combined feed terminal; 3. Rectangular coplanar waveguide; 4. Rectangular solder resist gap; 5. Grounding unit; 6. External microstrip line. DETAILED DESCRIPTION

[0020] To further illustrate each embodiment, the present invention provides drawings, which are part of the disclosure of the present invention and are mainly used to illustrate the embodiments. They can be used in conjunction with the relevant descriptions in the specification to explain the operating principles of the embodiments. With reference to these contents, ordinary technicians in the field should be able to understand other possible implementation methods and advantages of the present invention. The components in the figures are not drawn to scale, and similar component symbols are generally used to represent similar components.

[0021] According to an embodiment of the utility model, a UWB elliptical antenna is provided.

[0022] The present invention is now further described in conjunction with the accompanying drawings and specific implementation methods. Figure 1-Figure 4 As shown, the UWB elliptical antenna according to the embodiment of the utility model includes a dielectric substrate 1, an elliptical ring combination feed terminal 2 is arranged on the top of the dielectric substrate 1, a rectangular coplanar waveguide 3 and a rectangular solder resist gap 4 are arranged in sequence on the bottom of the dielectric substrate 1, and a plurality of grounding units 5 are evenly arranged on the inner bottom of the rectangular solder resist gap 4; the bottom end of the elliptical ring combination feed terminal 2 passes through the rectangular coplanar waveguide 3, the rectangular solder resist gap 4 and one of the grounding units 5 and is provided with an external microstrip line 6.

[0023] With the help of the above scheme, the UWB elliptical antenna provided by the utility model can provide good antenna performance under limited volume and weight conditions. By reducing the number of components and optimizing the design, the structure is simplified. At the same time, it has the advantages of diverse installation methods and easy installation. The antenna design optimizes the bandwidth while maintaining good VSWR, gain and phase characteristics, thereby ensuring the quality and reliability of wireless communication.

[0024] In one embodiment, for the above dielectric substrate 1, one side of the dielectric substrate 1 has a length of 35 mm and a width of 20 mm, and the dielectric constant of the dielectric substrate 1 is 4.4; the major axis of the elliptical ring combined feed terminal 1 is 21.6 mm, the minor axis is 12.0 mm, and the copper thickness is 0.035 mm; the width of the external microstrip line 6 is 1.5 mm, the length is 7 mm, and the thickness is 0.035 mm; the other side of the dielectric substrate 1 has a length of 35 mm, a width of 7 mm, a copper thickness of 0.035 mm, and an oil-coated width of 4.1 mm; the length of the grounding unit 5 is The diameter of the antenna is 6.3 mm and the height is 2.5 mm; the dielectric substrate 1, the rectangular coplanar waveguide 3, the rectangular solder resist gap 4 and the grounding unit 5 are all rectangular structures; the elliptical ring combination feed terminal 2 is an elliptical structure, so that the requirements of the ultra-wideband antenna are met through the precise size design of the antenna structure. The design of the ultra-wideband antenna can achieve wide bandwidth, good voltage standing wave ratio, flat gain and linear transfer function, and can be used as a communication equipment antenna inside a wireless terminal, outside a wireless terminal, and a ceiling or wall-mounted base station to adapt to different installation environments and requirements, thereby improving the flexibility of the antenna.

[0025] Specifically, the utility model provides an elliptical ultra-wideband omnidirectional antenna, which is composed of a dielectric substrate 1, an elliptical feed terminal 2 printed on the dielectric substrate 1, a rectangular coplanar waveguide 3, a rectangular solder resist gap 4, a grounding unit 5 and an external microstrip line 6.

[0026] Specifically, the insulating dielectric substrate FR4 is 0.93mm thick, with dimensions of 35mm long and 20mm wide, a dielectric constant of 4.4, the dielectric constant is as stable as possible, a copper thickness of 0.035mm, and a circuit immersion gold process.

[0027] One side of the dielectric substrate is a radiating elliptical pattern with a long axis of 21.6 mm, a short axis of 12.0 mm, and a copper thickness of 0.035 mm, which is connected to the outside through a microstrip line with a width of 1.5 mm, a length of 7 mm, and a thickness of 0.035 mm.

[0028] The other side of the dielectric substrate is a ground plane with a length of 35 mm, a width of 7 mm, a copper thickness of 0.035 mm, and a green oil coating with a width of 4.1 mm. The grounding part consists of three grounding rectangles with a length of 6.3 mm and a height of 2.5 mm.

[0029] In order to facilitate understanding of the above technical solution of the present invention, the working principle or operation method of the present invention in the actual process is described in detail below.

[0030] In practical applications, the elliptical ultra-wideband omnidirectional antenna provided in this experiment can be welded to the SMA connector as an external antenna, and can be directly welded inside the terminal or device for use, or can be directly made on the terminal PCB. The installation method is simple (the installation method is as follows Figure 4 As shown), it has excellent performance and low processing cost.

[0031] Specifically, under the above-mentioned geometric size parameters, the ultra-wideband antenna meets the requirements of the ultra-wideband antenna, that is, its return loss is less than -10dB in the 3Ghz-4.8GHz frequency band. At the same time, the ultra-wideband antenna of this structure can achieve wide bandwidth, good voltage standing wave ratio, flat gain and linear transfer function.

[0032] To sum up, with the help of the above-mentioned technical scheme of the utility model, the UWB elliptical antenna provided by the utility model can provide good antenna performance under limited volume and weight conditions, and realizes structural simplification by reducing the number of components and optimizing the design. At the same time, it has the advantages of various installation methods and easy installation. The antenna design optimizes the bandwidth while maintaining good VSWR, gain and phase characteristics, thereby ensuring the quality and reliability of wireless communication. The UWB elliptical antenna provided by the utility model has the advantages of small size, light weight, simple structure, easy installation, low processing and production cost, excellent RF parameters and compatibility with ultra-wideband working frequency bands. It can be used as a communication equipment antenna inside a wireless terminal, outside a wireless terminal, and a ceiling or wall-mounted base station to adapt to different installation environments and requirements, thereby improving the flexibility of the antenna.

[0033] In the present utility model, unless otherwise clearly stipulated and limited, the terms such as "installation", "setting", "connection", "fixation" and "screw-on" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integrated 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. Unless otherwise clearly defined, ordinary technicians in this field can understand the specific meanings of the above terms in the utility model according to the specific circumstances.

[0034] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A UWB elliptical antenna, comprising a dielectric substrate (1), characterized in that: An elliptical ring combined feed source terminal (2) is arranged on the top of the dielectric substrate (1), a rectangular coplanar waveguide (3) and a rectangular solder resist gap (4) are arranged in sequence on the bottom of the dielectric substrate (1), and a plurality of grounding units (5) are evenly arranged on the inner bottom of the rectangular solder resist gap (4); The bottom end of the elliptical ring combined feed source terminal (2) passes through the rectangular coplanar waveguide (3), the rectangular solder resist gap (4) and one of the grounding units (5), and is provided with an external microstrip line (6).

2. A UWB elliptical antenna according to claim 1, characterized in that: One side of the dielectric substrate (1) has a length of 35 mm and a width of 20 mm, and the dielectric constant of the dielectric substrate (1) is 4.

4.

3. A UWB elliptical antenna according to claim 2, characterized in that: The major axis of the elliptical ring combined feed source terminal (2) is 21.6 mm, the minor axis is 12.0 mm, and the copper thickness is 0.035 mm.

4. A UWB elliptical antenna according to claim 3, characterized in that: The external microstrip line (6) has a width of 1.5 mm, a length of 7 mm and a thickness of 0.035 mm.

5. A UWB elliptical antenna according to claim 4, characterized in that: The other side of the dielectric substrate (1) has a length of 35 mm, a width of 7 mm, a grounding surface with a copper thickness of 0.035 mm, and an oil coating width of 4.1 mm.

6. The UWB elliptical antenna according to claim 5, characterized in that: The grounding unit (5) has a length of 6.3 mm and a height of 2.5 mm.

7. The UWB elliptical antenna according to claim 6, characterized in that: The dielectric substrate (1), the rectangular coplanar waveguide (3), the rectangular solder resist gap (4) and the grounding unit (5) are all rectangular structures.

8. The UWB elliptical antenna according to claim 7, characterized in that: The elliptical ring combination feed source terminal (2) is an elliptical structure.

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