Miniaturized integrated services digital network active antenna applied to Beidou communication positioning

Abstract

The utility model relates to the technical field of Beidou navigation antennas, in particular to a miniaturized integrated service digital network active antenna applied to Beidou communication positioning, which comprises a back splint base and an antenna cover integrally assembled with the back splint base, and the back splint base is further provided with an antenna structure. The antenna structure comprises an S-frequency-band antenna oscillator, an L-frequency-band antenna oscillator, a B3-frequency-band antenna oscillator, a B2b-frequency-band antenna oscillator and the like. According to the utility model, a coupled feeding scheme is used, that is, the feed probe feeds the B3 frequency band antenna oscillator and the B2b frequency band antenna oscillator through a coupled feeding mode, so that the poor matching caused by the inductance effect of a miniaturized antenna and the serious mutual coupling phenomenon caused by similar frequency are reduced, and through the innovative structural design of the antenna oscillators of different frequency bands, the antenna oscillator of the B3 frequency band and the B2b frequency band can be integrated. Therefore, passive gain and low-elevation performance in a frequency band are improved, normal communication of the antenna in a severe outdoor environment is guaranteed, and in addition, the antenna is designed to be small and exquisite, light in weight, compact in structure and convenient to carry and install.

Description

Technical Field

[0001] The utility model relates to the technical field of Beidou navigation antennas, and more specifically to a miniaturized one-line active antenna used for Beidou communication positioning. Background Art

[0002] The Beidou satellite navigation system is a global satellite positioning and communication system independently developed by my country. With its gradual establishment and improvement, the positioning and communication technology based on the Beidou satellite navigation system has developed rapidly, and has penetrated into various fields and is widely used in military, transportation, water conservancy, emergency rescue and other related applications. Handheld terminal devices with Beidou communication and positioning functions are also widely used in various scenarios. However, since the size of handheld terminal devices has a great impact on the user experience, users have higher and higher requirements for lightness and compactness. Beidou antennas involve functional requirements of multiple frequency bands. The bandwidth between each required frequency band is large, and frequency band compatibility often makes it difficult to take into account the performance requirements of the antenna. Therefore, this brings increasing challenges to the performance and weight of miniaturized antennas. Utility Model Content

[0003] The purpose of the utility model is to solve the problems of low antenna gain and large size of the current Beidou navigation system handheld terminal equipment, and to provide a miniaturized one-line active antenna for Beidou communication positioning.

[0004] In order to achieve the above-mentioned purpose, the present invention specifically adopts the following technical solutions:

[0005] The utility model proposes a miniaturized one-line active antenna for Beidou communication positioning, comprising a back clip base and an antenna cover assembled integrally with the back clip base, wherein the back clip base is also provided with an antenna structure;

[0006] The antenna structure includes an S-band antenna element, an L-band antenna element, a B3-band antenna element, a B2b-band antenna element, an upper active circuit board, a radio frequency connector, a radio frequency connecting line, a shielding cover and a lower active circuit board;

[0007] The S-band antenna vibrator, the L-band antenna vibrator, the B3-band antenna vibrator, and the B2b-band antenna vibrator are sequentially arranged on the top of the upper active circuit board from top to bottom, and the centers of the S-band antenna vibrator, the L-band antenna vibrator, the B3-band antenna vibrator, and the B2b-band antenna vibrator are coaxially arranged;

[0008] A lower active circuit board is provided at the bottom of the upper active circuit board;

[0009] The base is equipped with a radio frequency connector used as an interface for the entire device;

[0010] The upper active circuit board and the lower active circuit board are respectively provided with radio frequency connection lines;

[0011] The upper active circuit board is connected to the lower active circuit board via a radio frequency connection line provided thereon;

[0012] The radio frequency connection line provided on the lower active circuit board is connected to the radio frequency connector;

[0013] A shielding cover is provided at the bottom of the upper active circuit board and the lower active circuit board;

[0014] The S-band antenna element, L-band antenna element, B3-band antenna element, and B2b-band antenna element are all equipped with feeding probes;

[0015] A feeding probe is provided at the center of the S-band antenna element. The feeding probe of the S-band antenna element sequentially passes through the L-band antenna element, the B3-band antenna element, and the B2b-band antenna element and is connected to the upper active circuit board. The feeding probe does not contact the L-band antenna element, the B3-band antenna element, and the B2b-band antenna element.

[0016] A feeding probe is eccentrically provided on the L-band antenna element. The feeding probe of the L-band antenna element sequentially passes through the B3-band antenna element and the B2b-band antenna element and is connected to the upper active circuit board. The feeding probe does not contact the B3-band antenna element and the B2b-band antenna element.

[0017] The B3 band antenna element is eccentrically provided with two feeding probes, which are connected to the B3 band antenna element and the B2b band antenna element through coupling feeding, and pass through the B2b band antenna element to be connected to the upper active circuit board.

[0018] As a preferred technical solution of the present invention, the S-band antenna element has a length, width and height of 25mm×25mm×2mm;

[0019] The L-band antenna element has a length, width and height of 33mm×33mm×3mm, and the feeding probe of the L-band antenna element is 5mm away from its center;

[0020] The S-band antenna vibrator and the L-band antenna vibrator are both made of ceramic;

[0021] The length, width and height dimensions of the B3 band antenna are 39mm×39mm×3mm, and the feed probe of the B3 band antenna is 9.2mm away from its center.

[0022] The B2b band antenna vibrator has a diameter of 50mm × 4mm.

[0023] The B3 band antenna vibrator and the B2b band antenna vibrator are made of tp-2 material.

[0024] As a preferred technical solution of the present invention, the active circuits of the upper active circuit board and the lower active circuit board of the active antenna are connected by plugging a pin header and a female header.

[0025] As a preferred technical solution of the present invention, the L-band antenna element, the B3-band antenna element, and the B2b-band antenna element are provided with metal vias that allow the feeding probe of the S-band antenna element to avoid them.

[0026] As a preferred technical solution of the present invention, the B3-band antenna element and the B2b-band antenna element are provided with metal vias that allow the feeding probe of the L-band antenna element to avoid them.

[0027] As a preferred technical solution of the present invention, the diameter and height of the antenna cover are 68mm×38mm.

[0028] As a preferred technical solution of the present invention, the feeding probe is connected to the metal patch on the B3 frequency band antenna element by coupling feeding.

[0029] As an optimal technical solution of the present invention, the B2b band antenna vibrator and the B3 band antenna vibrator are fixedly connected by furnace welding; the S band antenna vibrator, the L band antenna vibrator, and the B3 band antenna vibrator are each fixedly connected to each other by 3M double-sided tape.

[0030] As an optimal technical solution of the present utility model, the feeding probes of the B2b band antenna element, the B3 band antenna element, the L band antenna element, and the S band antenna element all pass through the upper active circuit board and are soldered to the RF microstrip line on the upper active circuit board and are connected to the active circuit.

[0031] As an optimal technical solution of the present invention, the upper active circuit board or the lower active circuit board is further provided with an S-band low-noise active amplifier circuit, an L-band low-noise active amplifier circuit and a B3 / B2b-band low-noise active amplifier circuit.

[0032] The beneficial effects of the present invention are as follows: the present invention uses a coupled feeding scheme, that is, the feeding probe feeds the B3 band antenna element and the B2b band antenna element by coupled feeding, thereby reducing the matching difference caused by the inductance effect of the miniaturized antenna and the serious mutual coupling phenomenon caused by the similar frequencies. Through the innovative structural design of the antenna elements in different frequency bands, the passive gain and low elevation angle performance within the frequency band are improved, thereby ensuring the normal communication of the antenna in harsh outdoor environments. In addition, the utility model itself is designed to be small and exquisite, lightweight, compact, and easy to carry and install. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] Figure 1It is a schematic diagram of the exploded structure of the utility model;

[0034] Figure 2 This is a schematic diagram of the three-dimensional structure of the utility model antenna structure;

[0035] Figure 3 yes Figure 2 Schematic diagram of the bottom-view stereoscopic structure;

[0036] Figure 4 yes Figure 1 Schematic diagram of the top view structure;

[0037] Figure 5 This is a partial structural perspective view of the antenna structure of the utility model;

[0038] Figure 6 is an S-band return loss curve of the active antenna described in the embodiment;

[0039] Figure 7 is the S-band 3D pattern of the active antenna described in the embodiment;

[0040] Figure 8 1 is a graph showing the L-band return loss of the active antenna according to the embodiment;

[0041] Figure 9 is the L-band 3D pattern of the active antenna described in the embodiment;

[0042] Figure 10 2 is a graph showing the return loss of the active antenna in the B3 / B2b frequency band according to the embodiment;

[0043] Figure 11 is the B3 frequency band 3d directional pattern of the active antenna described in the embodiment;

[0044] Figure 12 It is the B2b frequency band 3d radiation pattern of the active antenna described in the embodiment.

[0045] Figure markings: 1-back clip base, 2-antenna cover, 3-antenna structure, 31-S band antenna element, 32-L band antenna element, 33-B3 band antenna element, 34-B2b band antenna element, 35-upper active circuit board, 36-RF connector, 37-RF connecting line, 38-shielding cover, 39-lower active circuit board, 310-feeding probe. DETAILED DESCRIPTION

[0046] Reference Figure 1-5 As shown, the utility model proposes a miniaturized one-line active antenna for Beidou communication positioning, comprising a back clip base and an antenna cover assembled integrally with the back clip base, wherein the back clip base is also provided with an antenna structure;

[0047] The antenna structure includes an S-band antenna element, an L-band antenna element, a B3-band antenna element, a B2b-band antenna element, an upper active circuit board, a radio frequency connector, a radio frequency connecting line, a shielding cover and a lower active circuit board;

[0048] The S-band antenna vibrator, the L-band antenna vibrator, the B3-band antenna vibrator, and the B2b-band antenna vibrator are sequentially arranged on the top of the upper active circuit board from top to bottom, and the centers of the S-band antenna vibrator, the L-band antenna vibrator, the B3-band antenna vibrator, and the B2b-band antenna vibrator are coaxially arranged;

[0049] A lower active circuit board is provided at the bottom of the upper active circuit board;

[0050] The base is equipped with a radio frequency connector used as an interface for the entire device;

[0051] The upper active circuit board and the lower active circuit board are respectively provided with radio frequency connection lines;

[0052] The upper active circuit board is connected to the lower active circuit board via a radio frequency connection line provided thereon;

[0053] The radio frequency connection line provided on the lower active circuit board is connected to the radio frequency connector;

[0054] A shielding cover is provided at the bottom of the upper active circuit board and the lower active circuit board; the S-band antenna element, the L-band antenna element, the B3-band antenna element, and the B2b-band antenna element are all provided with a feeding probe;

[0055] A feeding probe is provided at the center of the S-band antenna element. The feeding probe of the S-band antenna element sequentially passes through the L-band antenna element, the B3-band antenna element, and the B2b-band antenna element and is connected to the upper active circuit board. The feeding probe does not contact the L-band antenna element, the B3-band antenna element, and the B2b-band antenna element.

[0056] A feeding probe is eccentrically provided on the L-band antenna element. The feeding probe of the L-band antenna element sequentially passes through the B3-band antenna element and the B2b-band antenna element and is connected to the upper active circuit board. The feeding probe does not contact the B3-band antenna element and the B2b-band antenna element.

[0057] The B3 band antenna element is eccentrically provided with two feeding probes, which are connected to the B3 band antenna element and the B2b band antenna element through coupling feeding, and pass through the B2b band antenna element to be connected to the upper active circuit board.

[0058] The dimensions of the S-band antenna element are 25mm in length, width and height, 25mm by 2mm.

[0059] The L-band antenna element has a length, width and height of 33mm×33mm×3mm, and the feeding probe of the L-band antenna element is 5mm away from its center;

[0060] The S-band antenna vibrator and the L-band antenna vibrator are both made of ceramic;

[0061] The length, width and height dimensions of the B3 band antenna are 39mm×39mm×3mm, and the feed probe of the B3 band antenna is 9.2mm away from its center.

[0062] The B2b band antenna vibrator has a diameter of 50mm × 4mm.

[0063] The B3 band antenna vibrator and the B2b band antenna vibrator are made of tp-2 material.

[0064] The active circuits of the upper active circuit board and the lower active circuit board of the active antenna are connected by plugging a pin header and a female header.

[0065] Among them, the L-band antenna element, the B3-band antenna element, and the B2b-band antenna element are provided with metal vias that can allow the feeding probe of the S-band antenna element to avoid.

[0066] Among them, the B3-band antenna element and the B2b-band antenna element are provided with metal vias that can allow the feeding probe of the L-band antenna element to avoid.

[0067] The diameter and height of the antenna cover are 68 mm × 38 mm.

[0068] Among them, the feeding probe is connected to the metal patch on the B3 frequency band antenna element through coupled feeding.

[0069] Among them, the B2b band antenna vibrator and the B3 band antenna vibrator are fixedly connected by furnace welding; the S band antenna vibrator, the L band antenna vibrator, and the B3 band antenna vibrator are each fixedly connected to each other by 3M double-sided tape.

[0070] Among them, the feeding probes of the B2b band antenna element, B3 band antenna element, L band antenna element, and S band antenna element all pass through the upper active circuit board and are soldered to the RF microstrip line on the upper active circuit board, and are connected to the active circuit.

[0071] Among them, the upper active circuit board or the lower active circuit board is also provided with an S-band low-noise active amplifier circuit, an L-band low-noise active amplifier circuit and a B3 / B2b-band low-noise active amplifier circuit; the performance indicators of the passive antenna are amplified with lower loss and interference.

[0072] Wherein, the components on the upper active circuit board or the lower active circuit board are also connected via radio frequency microstrip lines.

[0073] Wherein, the back clip base adopts a back clip fixed installation method.

[0074] Among them, the active antenna supports Beidou third-generation L / S short message communication and Beidou B2b / B3 dual-frequency navigation and positioning functions.

[0075] Among them, the antenna cover and the back clip base are assembled by screw and nut assembly and have a sealed design.

[0076] This utility model provides great convenience and efficiency for system integration by cleverly integrating key RF circuits such as low-noise amplification, power amplification and power detection. In order to overcome the matching problems that are prone to occur in miniaturized antennas under the inductive effect, and the serious mutual coupling phenomenon that may occur when the frequencies are similar, the utility model innovatively adopts a coupled feeding scheme, which significantly improves these problems and ensures the stability of the antenna performance. In addition, through the application of the new design, the antenna achieves a significant improvement in passive gain within the frequency band and optimizes the low elevation angle performance, so that the antenna can ensure stable communication quality even in harsh outdoor environments. The antenna itself is designed to be small and exquisite, lightweight and compact. It is not only easy to carry and install, but also meets the IP67 level waterproof standard and can cope with various complex climatic conditions.

[0077] To further enhance ease of use, this antenna adopts a unique one-line design, enabling efficient transmission of navigation signals and power feeds through the same cable, greatly simplifying the wiring process. Furthermore, the antenna is equipped with flexible and diverse installation structures, particularly the back-clip fixed installation method, enabling it to easily adapt to the installation requirements of various Beidou application fields, such as vehicle-mounted and ship-mounted, demonstrating broad application prospects. Example

[0078] Figure 6 : This is a graph of the S-band return loss of the active antenna described in the embodiment; the horizontal axis is the frequency and the vertical axis is the reflection coefficient. It can be seen that the operating bandwidth is 2.46~2.52GHz, which completely covers the S-band frequency range;

[0079] Figure 7 3D directional pattern of the active antenna in the S-band of the embodiment; showing the radiation distribution of the S-band antenna in all directions;

[0080] Figure 8 : This is a graph of the L-band return loss of the active antenna described in the embodiment; the horizontal axis is the frequency and the vertical axis is the reflection coefficient. It can be seen that the operating bandwidth is 1.59~1.63GHz, which fully covers the L-band frequency range;

[0081] Figure 9 3D directional pattern of the active antenna in the L-band of the embodiment; showing the radiation distribution of the L-band antenna in all directions;

[0082] Figure 10 : This is a B3 / B2b frequency band return loss curve of the active antenna described in the embodiment; the horizontal axis is frequency and the vertical axis is reflection coefficient. It can be seen that the operating bandwidth is 1.20-1.21 GHz and 1.26-1.27 GHz, covering the B3 and B2b band frequency ranges;

[0083] Figure 11 3D directional pattern of the active antenna in the B3 frequency band according to the embodiment; showing the radiation distribution of the B3 frequency band antenna in all directions;

[0084] Figure 12 3D directional pattern of the active antenna in the B2b frequency band according to the embodiment, showing the radiation distribution of the B2b frequency band antenna in all directions.

[0085] The above shows and describes the basic principles and main features of the present invention and the advantages of the present invention. It is obvious to those skilled in the art that the present invention is not limited to the details of the above exemplary embodiments and that the present invention can be implemented in other specific forms without departing from the spirit or essential characteristics of the present invention. Therefore, from all perspectives, the embodiments should be regarded as illustrative and non-restrictive. The scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes that fall within the meaning and range of equivalents of the claims be included in the present invention. Any reference signs in the claims should not be construed as limiting the claim to which they relate.

[0086] In addition, it should be understood that although this specification is described in terms of implementation methods, not every implementation method contains only one independent technical solution. This narrative method of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment can also be appropriately combined to form other implementation methods that can be understood by those skilled in the art.

Claims

1. A miniaturized, one-line active antenna for Beidou communication positioning, comprising a back clip base and an antenna cover integrally assembled with the back clip base, characterized in that: The back clip base is also provided with an antenna structure; The antenna structure includes an S-band antenna element, an L-band antenna element, a B3-band antenna element, a B2b-band antenna element, an upper active circuit board, a radio frequency connector, a radio frequency connecting line, a shielding cover and a lower active circuit board; The S-band antenna vibrator, the L-band antenna vibrator, the B3-band antenna vibrator, and the B2b-band antenna vibrator are sequentially arranged on the top of the upper active circuit board from top to bottom, and the centers of the S-band antenna vibrator, the L-band antenna vibrator, the B3-band antenna vibrator, and the B2b-band antenna vibrator are coaxially arranged; A lower active circuit board is provided at the bottom of the upper active circuit board; The base is equipped with a radio frequency connector used as an interface for the entire device; The upper active circuit board and the lower active circuit board are respectively provided with radio frequency connection lines; The upper active circuit board is connected to the lower active circuit board via a radio frequency connection line provided thereon; The radio frequency connection line provided on the lower active circuit board is connected to the radio frequency connector; A shielding cover is provided at the bottom of the upper active circuit board and the lower active circuit board; The S-band antenna element, L-band antenna element, B3-band antenna element, and B2b-band antenna element are all equipped with feeding probes; A feeding probe is provided at the center of the S-band antenna element. The feeding probe of the S-band antenna element sequentially passes through the L-band antenna element, the B3-band antenna element, and the B2b-band antenna element and is connected to the upper active circuit board. The feeding probe does not contact the L-band antenna element, the B3-band antenna element, and the B2b-band antenna element. A feeding probe is eccentrically provided on the L-band antenna element. The feeding probe of the L-band antenna element sequentially passes through the B3-band antenna element and the B2b-band antenna element and is connected to the upper active circuit board. The feeding probe does not contact the B3-band antenna element and the B2b-band antenna element. The B3 band antenna element is eccentrically provided with two feeding probes, which are connected to the B3 band antenna element and the B2b band antenna element through coupling feeding, and pass through the B2b band antenna element to be connected to the upper active circuit board.

2. The miniaturized one-line active antenna for Beidou communication positioning according to claim 1, characterized in that: The S-band antenna element has a length, width and height of 25mm×25mm×2mm; The L-band antenna element has a length, width and height of 33mm×33mm×3mm, and the feeding probe of the L-band antenna element is 5mm away from its center; The S-band antenna vibrator and the L-band antenna vibrator are both made of ceramic; The length, width and height dimensions of the B3 band antenna are 39mm×39mm×3mm, and the feed probe of the B3 band antenna is 9.2mm away from its center. The B2b band antenna vibrator has a diameter of 50mm × 4mm. The B3 band antenna vibrator and the B2b band antenna vibrator are made of tp-2 material.

3. The miniaturized one-line active antenna for Beidou communication positioning according to claim 1, characterized in that: The active circuits of the upper active circuit board and the lower active circuit board of the active antenna are connected through the insertion of pin headers and female headers.

4. The miniaturized one-line active antenna for Beidou communication positioning according to claim 1, characterized in that: The L-band antenna element, the B3-band antenna element, and the B2b-band antenna element are provided with metal vias that allow the feeding probe of the S-band antenna element to avoid them.

5. The miniaturized one-line active antenna for Beidou communication positioning according to claim 1, characterized in that: The B3-band antenna element and the B2b-band antenna element are provided with metal vias that allow the feeding probe of the L-band antenna element to avoid them.

6. The miniaturized one-line active antenna for Beidou communication positioning according to claim 1, characterized in that: The diameter and height of the antenna cover are 68 mm×38 mm.

7. The miniaturized one-line active antenna for Beidou communication positioning according to claim 1, characterized in that: The feeding probe is connected to the metal patch on the B3 band antenna element through coupling feeding.

8. The miniaturized one-line active antenna for Beidou communication positioning according to claim 1, characterized in that: The B2b band antenna vibrator and the B3 band antenna vibrator are fixedly connected by furnace welding; the S band antenna vibrator, L band antenna vibrator, and B3 band antenna vibrator are fixedly connected to each other by 3M double-sided tape.

9. The miniaturized one-line active antenna for Beidou communication positioning according to claim 3, characterized in that: The feeding probes of the B2b band antenna element, the B3 band antenna element, the L band antenna element and the S band antenna element all pass through the upper active circuit board and are soldered to the RF microstrip line on the upper active circuit board and are connected to the active circuit.

10. The miniaturized one-line active antenna for Beidou communication positioning according to claim 1, characterized in that: The upper active circuit board or the lower active circuit board is further provided with an S-band low-noise active amplifier circuit, an L-band low-noise active amplifier circuit and a B3 / B2b-band low-noise active amplifier circuit.

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