Broadband miniaturized integrated GNSS antenna

Abstract

The utility model discloses a broadband miniaturized integrated GNSS antenna comprising a printed circuit board, an antenna substrate, a high-frequency radiation unit, a high-frequency feed probe, a low-frequency radiation unit, a low-frequency feed probe and a choke branch. The antenna base material is of a hollow structure and covers the printed circuit board; the high-frequency radiation unit is arranged on the upper surface of the antenna base material, and the high-frequency radiation unit is electrically connected with the printed circuit board through the high-frequency feed probe; the low-frequency radiation unit is arranged on the lower surface in the antenna base material, and the low-frequency radiation unit is electrically connected with the printed circuit board through the low-frequency feed probe; the choke branch is arranged on the side surface of the antenna substrate. According to the integrated GNSS antenna provided by the utility model, the combination of an air medium and a microstrip patch antenna is realized; on the basis of miniaturization, lightness, thinness and integration of the antenna, a GNSS full-frequency design scheme is realized, good signal receiving performance is ensured, and the antenna has a wide application prospect.

Description

Technical Field

[0001] This utility model relates to the field of antenna technology, and in particular to a broadband miniaturized integrated GNSS antenna. Background Technology

[0002] The rise of the satellite navigation industry has accelerated the development of circularly polarized antennas. Common circularly polarized antennas include microstrip patch antennas, helical antennas, and array antennas. Compared with helical antennas and array antennas, microstrip patch antennas are more widely used in mobile and satellite communications due to their advantages such as light weight, low profile, and ease of integration.

[0003] Based on the trend of miniaturization in satellite navigation and positioning terminal equipment, antennas, as a key component in wireless communication systems, should also develop towards miniaturization, thinness, and integration. Because microstrip patch antennas have very narrow bandwidth, to meet the needs of multi-system or multi-band operation in satellite navigation and positioning, positioning terminal equipment typically incorporates two or more patch antennas. This leads to complex structures and installations, failing to meet the integration requirements of positioning terminal equipment. While multiple patch antennas are usually stacked, the thickness of stacked patch antennas is often considerable, failing to meet the thinness and lightness requirements of positioning terminal equipment.

[0004] To meet the miniaturization requirements of satellite navigation and positioning terminals, existing technologies generally use materials with higher dielectric constants as the dielectric layer of microstrip antennas. However, materials with higher dielectric constants will also have increased losses, which will lead to a reduction in the operating bandwidth and gain of the patch antenna. Alternatively, slots can be cut into the microstrip patch to reduce the antenna size, but this will significantly reduce the antenna's bandwidth characteristics. Neither of these methods can simultaneously achieve the requirements of miniaturization and full-band bandwidth.

[0005] Therefore, there is an urgent need to develop an integrated GNSS antenna that can balance broadband characteristics and miniaturization. Utility Model Content

[0006] The purpose of this invention is to provide a broadband miniaturized integrated GNSS antenna to solve the problems mentioned in the background section. To achieve the above objective, this invention provides the following technical solution:

[0007] A broadband miniaturized integrated GNSS antenna includes a printed circuit board, an antenna substrate, a high-frequency radiating element, a high-frequency feed probe, a low-frequency radiating element, a low-frequency feed probe, and a choke stub. The antenna substrate has a hollow structure and is mounted on the printed circuit board. The high-frequency radiating element is disposed on the upper surface of the antenna substrate and is electrically connected to the printed circuit board via the high-frequency feed probe. The low-frequency radiating element is disposed on the lower surface inside the antenna substrate and is electrically connected to the printed circuit board via the low-frequency feed probe. The choke stub is disposed on the side of the antenna substrate.

[0008] Furthermore, the choke stub includes multiple spaced electroplated strips arranged around the side of the antenna substrate.

[0009] Furthermore, the choke stub is electroplated onto the outer surface of the antenna substrate.

[0010] Furthermore, the high-frequency feed probe and the low-frequency feed probe are disposed within the hollow cavity of the antenna substrate.

[0011] Furthermore, the low-frequency performance of the broadband miniaturized integrated GNSS antenna is 1164MHz-1278MHz.

[0012] Furthermore, the high-frequency performance of the broadband miniaturized integrated GNSS antenna is 1520MHz-1610MHz.

[0013] The beneficial effects of this utility model are as follows: This utility model provides a broadband miniaturized integrated GNSS antenna, which realizes the combination of air dielectric and microstrip patch antenna; on the basis of antenna miniaturization, thinness and integration, it can not only broaden the antenna operating bandwidth and realize the GNSS full-band design scheme, meeting the needs of modern electronic equipment for antenna miniaturization and broadband; it also ensures good signal reception performance and has broad application prospects. Attached Figure Description

[0014] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0015] Figure 1 This is a schematic diagram of the structure of this utility model.

[0016] Figure 2 This is a schematic diagram of the antenna substrate in this utility model.

[0017] It should be noted that the accompanying drawings are not necessarily drawn to scale, but are shown only in a schematic manner without affecting the reader's understanding. Detailed Implementation

[0018] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0019] In this invention, the terms "upper," "lower," "left," "right," "front," "rear," "top," "bottom," "inner," "outer," "middle," "vertical," "horizontal," "lateral," and "longitudinal" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. These terms are primarily for the purpose of better describing this invention and its embodiments, and are not intended to limit the indicated device, element, or component to having a specific orientation, or to be constructed and operated in a specific orientation.

[0020] Furthermore, in addition to indicating direction or positional relationship, some of the aforementioned terms may also have other meanings. For example, the term "above" may also be used in some cases to indicate a certain dependency or connection relationship. Those skilled in the art can understand the specific meaning of these terms in this utility model according to the specific circumstances.

[0021] Furthermore, the terms "installation," "setup," "equipped with," "connection," and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral structure; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium, or an internal connection between two devices, components, or parts. Those skilled in the art can understand the specific meaning of these terms in this utility model based on the specific circumstances.

[0022] It should also be understood that the terminology used in this specification is for the purpose of describing particular embodiments only and is not intended to limit the scope of the invention. As used in this specification and the appended claims, the singular forms “a,” “an,” and “the” are intended to include the plural forms unless the context clearly indicates otherwise.

[0023] It should also be further understood that the term "and / or" as used in this specification and the appended claims refers to any combination of one or more of the associated listed items and all possible combinations, and includes such combinations.

[0024] like Figure 1 and Figure 2 As shown, a broadband miniaturized integrated GNSS antenna includes a printed circuit board 1, an antenna substrate 2, a high-frequency radiating element 3, a high-frequency feed probe 4, a low-frequency radiating element 5, a low-frequency feed probe 6, and a choke stub 7. The antenna substrate 2 is a hollow structure, covering the printed circuit board 1, serving as a foundation for supporting and positioning other components, and providing a spatial framework for the layout of the antenna's various functional units. This design not only reduces the antenna's weight and facilitates the layout of the internal feed structure but also contributes to the miniaturization of the antenna.

[0025] A high-frequency radiating element 3 is disposed on the upper surface of the antenna substrate 2 and is used to receive high-frequency GNSS signals. The high-frequency radiating element 3 is electrically connected to the printed circuit board 1 via a high-frequency feed probe 4, thereby receiving excitation signals from the printed circuit board 1 and radiating high-frequency electromagnetic waves outwards, ensuring the normal operation of the antenna in the high-frequency band. A low-frequency radiating element 5 is disposed on the lower surface inside the antenna substrate 2 and is used to receive low-frequency GNSS signals. The low-frequency radiating element 5 is electrically connected to the printed circuit board 1 via a low-frequency feed probe 6, ensuring that low-frequency signals can be effectively transmitted and radiated, thus realizing the antenna's function in the low-frequency band. The layered arrangement of the high-frequency radiating element 3 and the low-frequency radiating element 5 effectively utilizes the space of the antenna substrate 2, further promoting antenna miniaturization.

[0026] To suppress unwanted signal interference and improve the antenna's signal reception efficiency, this embodiment also includes a choke stub 7 on the side of the antenna substrate 2. The choke stub 7 plays a crucial role in optimizing the overall antenna performance. It effectively extends the antenna's effective electrical length, achieving frequency reduction and current suppression. It blocks the current flowing from the upper surface of the antenna substrate to the back of the substrate, suppressing the radiation of ineffective energy backward, thus improving the effectiveness of the antenna's spatial energy coverage. The choke stub 7 can also generate a charge component in the vertical direction, effectively improving the antenna's low elevation gain, thereby achieving a smaller antenna size and full-band GNSS characteristics.

[0027] In practice, firstly, a piece of engineering plastic raw material is prepared, and then the shape of antenna substrate 2 is formed through machining and other steps. Next, the high-frequency radiating unit 3, the low-frequency radiating unit 5, and the choke branch 7 are electroplated onto the surface of antenna substrate 2 through electroplating. Finally, the high-frequency feed probe 4 is electrically connected to the high-frequency radiating unit 3 and the printed circuit board 1 through welding. The low-frequency feed probe 6 is electrically connected to the low-frequency radiating unit 5 and the printed circuit board 1 through welding, thus completing the overall assembly of the antenna.

[0028] Through the above technical solution, this embodiment of a broadband miniaturized integrated GNSS antenna realizes the combination of air dielectric and microstrip patch antenna; on the basis of antenna miniaturization, thinness and integration, it can not only broaden the antenna operating bandwidth and realize the GNSS full-band design scheme, meeting the needs of modern electronic devices for antenna miniaturization and broadband; it also ensures good signal reception performance and has broad application prospects.

[0029] In one embodiment, see Figure 1 and Figure 2 The choke stub 7 includes multiple spaced-apart electroplated strips that surround the side of the antenna substrate 2. This structure, composed of multiple electroplated strips, can better exert its choke effect through a reasonable layout and interaction, thereby improving the antenna's anti-interference capability and signal control.

[0030] In one embodiment, the choke stub 7 is deposited on the outer surface of the antenna substrate 2 using an electroplating process. Strict control of electroplating parameters (such as electroplating solution composition, electroplating time, current density, etc.) ensures the quality and performance of the choke stub 7. The electroplating process guarantees good adhesion and electrical performance between the choke stub and the antenna substrate 2, ensuring that the choke stub 7 reliably performs its intended function.

[0031] In one embodiment, see Figure 2 To maintain the compactness and stability of the antenna structure, the high-frequency feed probe 4 and the low-frequency feed probe 6 are disposed within the hollow cavity of the antenna substrate 2. This layout not only facilitates a compact structural design and reduces space occupation, but also ensures the stability and efficiency of the feeding process, enabling high-frequency and low-frequency signals to be accurately transmitted between the corresponding radiating elements and the printed circuit board 1. This cleverly avoids mutual interference between the feeding structures while ensuring good electrical connections.

[0032] In one embodiment, regarding performance parameters, the low-frequency performance of the broadband miniaturized integrated GNSS antenna covers a frequency band of 1164MHz-1278MHz, within which it can stably receive and radiate low-frequency signals, meeting the signal processing requirements of the low-frequency portion of the corresponding satellite navigation and positioning system; the high-frequency performance covers a frequency band of 1520MHz-1610MHz, ensuring effective signal interaction even at high frequencies, thus achieving a relatively wide bandwidth, adapting to the signal transmission requirements of various GNSS application scenarios; and meeting the signal reception requirements of various GNSS systems (such as GPS, BeiDou, Galileo, etc.).

[0033] It should also be noted that, without conflict, the embodiments of this utility model and the features therein can be combined with each other to obtain new embodiments.

[0034] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model in any way. The scope of protection of the present utility model should be determined by the scope of the claims. Although the present utility model has been disclosed above with reference to preferred embodiments, it is not intended to limit the present utility model. Any person skilled in the art can make some modifications or alterations to the above-disclosed technical content to create equivalent embodiments without departing from the scope of the present utility model. Any simple modifications, equivalent changes, and alterations made to the above embodiments based on the technical essence of the present utility model without departing from the scope of the present utility model shall still fall within the scope of the present utility model.

Claims

1. A broadband miniaturized integrated GNSS antenna, characterized in that, The antenna substrate includes a printed circuit board (1), an antenna base (2), a high-frequency radiating unit (3), a high-frequency feed probe (4), a low-frequency radiating unit (5), a low-frequency feed probe (6), and a choke stub (7). The antenna base (2) is a hollow structure and is placed on the printed circuit board (1). The high-frequency radiating unit (3) is disposed on the upper surface of the antenna base (2) and is electrically connected to the printed circuit board (1) through the high-frequency feed probe (4). The low-frequency radiating unit (5) is disposed on the lower surface inside the antenna base (2) and is electrically connected to the printed circuit board (1) through the low-frequency feed probe (6). The choke stub (7) is disposed on the side of the antenna base (2).

2. The broadband miniaturized integrated GNSS antenna according to claim 1, characterized in that, The choke stub (7) includes multiple spaced electroplated strips arranged around the side of the antenna substrate (2).

3. The broadband miniaturized integrated GNSS antenna according to claim 2, characterized in that, The choke stub (7) is electroplated onto the outer surface of the antenna substrate (2).

4. The broadband miniaturized integrated GNSS antenna according to claim 1, characterized in that, The high-frequency feed probe (4) and the low-frequency feed probe (6) are disposed in the hollow cavity of the antenna substrate (2).

5. The broadband miniaturized integrated GNSS antenna according to claim 1, characterized in that, The low-frequency performance of the broadband miniaturized integrated GNSS antenna is 1164MHz-1278MHz.

6. The broadband miniaturized integrated GNSS antenna according to claim 5, characterized in that, The high-frequency performance of the broadband miniaturized integrated GNSS antenna is 1520MHz-1610MHz.

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