North three low-profile short message terminal antenna

Abstract

The utility model discloses a north three low profile short message terminal antenna, comprising a circuit board, and a circularly polarized antenna A and a circularly polarized antenna B which are installed on the circuit board, the circularly polarized antenna A is composed of a first antenna branch, a second antenna branch and a first bridge, the circularly polarized antenna B is composed of a third antenna branch, a fourth antenna branch and a second bridge, a microstrip line is arranged in the middle of the top end of the circuit board, the first bridge and the microstrip line form a 90-degree phase difference, the second bridge and the microstrip line form a 90-degree phase difference so as to generate circularly polarized radiation, and two orthogonal circularly polarized modes are generated through coupling; the antenna has the characteristics of low profile, high gain and omnidirectional radiation, can enable the terminal antenna to have radiation capability in the horizontal direction and the vertical direction, meets the requirement of a terminal for receiving satellite signals in a multi-attitude manner, and is provided with filter circuits of respective frequency bands, so that the transceiving isolation of the terminal antenna is improved.

Description

Technical Field

[0001] The utility model relates to the field of antennas, in particular to a North Three low-profile short message terminal antenna. Background Art

[0002] With the development of society, natural disasters occur frequently, and miniaturized emergency terminals have a large market. However, traditional antennas are mostly microstrip single-layer and stacked-layer, such as ceramic antennas, which occupy a large area and are thick, making it impossible to miniaturize the terminal design. The antenna signal is weak, which only meets the needs of manual satellite operation of the equipment, and the communication success rate is low. From the perspective of market demand, terminal equipment continues to be miniaturized and can meet the needs of multi-attitude satellite positioning and communication products to maintain long-term two-way communication and data transmission. The existing antennas have transceiver antenna solutions with mostly flat ceramic antennas with low gain, large size, and low integration. The antenna isolation is low, and in the small-size terminal design, the transmission and reception interfere with each other greatly. In addition, the antenna has obvious directionality, and the product cannot achieve multi-attitude operation, and can only be manually operated to search for satellites for two-way communication. Utility Model Content

[0003] The utility model aims to provide a Beisan low-profile short message terminal antenna to solve the problems of low antenna gain, low isolation, large mutual interference between transmission and reception, and inability to achieve multi-posture operation proposed in the above background technology.

[0004] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a North Three low-profile short message terminal antenna, comprising a circuit board, and a circularly polarized antenna A and a circularly polarized antenna B installed on the circuit board, wherein the circularly polarized antenna A is arranged on the left side of the top of the circuit board, and the circularly polarized antenna A is composed of a No. 1 antenna branch, a No. 2 antenna branch and a first bridge, and the No. 1 antenna branch is perpendicularly orthogonal to the No. 2 antenna branch to form an inverted L-shaped antenna A connected to the circuit board, and the circularly polarized antenna B is arranged on the right side of the top of the circuit board. Antenna B is composed of antenna branch No. 3, antenna branch No. 4 and a second bridge. Antenna branch No. 3 is perpendicular to antenna branch No. 4 and is connected to the circuit board in the form of an inverted L-shaped antenna B. The overall shape formed by antenna branch No. 4, antenna branch No. 3, antenna branch No. 2 and antenna branch No. 1 in sequence is a "U"-shaped structure. A microstrip line is arranged in the middle of the top of the circuit board. The first bridge and the microstrip line, as well as the second bridge and the microstrip line, all form a 90-degree phase difference to generate circularly polarized radiation and utilize coupling to generate two orthogonal circularly polarized modes.

[0005] Furthermore, it also includes four feed sources, which are used to transmit initial electromagnetic energy to the antenna branches to radiate electromagnetic energy based on the antenna branches, one of the four feed sources is electrically connected to antenna branch No. 1, another feed source is electrically connected to antenna branch No. 2, and the remaining two feed sources are electrically connected to antenna branch No. 3 and antenna branch No. 4 respectively.

[0006] Furthermore, the L-shaped antenna A formed by the No. 1 antenna branch and the No. 2 antenna branch, and the L-shaped antenna B formed by the No. 3 antenna branch and the No. 4 antenna branch both adopt PIFA antennas or monopole antennas. The operating frequency of the L-shaped antenna A formed by the No. 1 antenna branch and the No. 2 antenna branch is equal to the operating frequency band of the first bridge, and the operating frequency of the L-shaped antenna B formed by the No. 3 antenna branch and the No. 4 antenna branch is equal to the operating frequency band of the second bridge.

[0007] Furthermore, it also includes a debugging antenna installed at the center position above the circuit board, which is used to debug the radiation surface of the L-shaped antenna A / B to confirm the operating frequency of the L-shaped antenna A / B, and the debugging antenna, L-shaped antenna A and L-shaped antenna B together constitute a Beidou transceiver and positioning system.

[0008] Furthermore, the antenna branches No. 4, No. 3, No. 2 and No. 1 all include a high-frequency dielectric plate and an antenna radiator arranged on the front side of the high-frequency dielectric plate, and the dielectric constant of the high-frequency dielectric plate is 2-16.

[0009] Furthermore, the length of the antenna radiator does not exceed one quarter of the wavelength of the operating frequency of the L-shaped antenna A / B.

[0010] Furthermore, a cable assembly is electrically connected to the bottom of the circuit board, and the cable assembly has at least two cables.

[0011] The beneficial effects of the utility model are as follows: the utility model has the characteristics of low profile, high gain and omnidirectional radiation, which enables the terminal antenna to have radiation capabilities in both horizontal and vertical directions, meeting the terminal's needs for receiving satellite signals in multiple postures, and relying on debugging the antenna to allow the terminal antenna to have filtering circuits in their respective frequency bands, so as to improve the transmit and receive isolation of the terminal antenna, which is conducive to the promotion and use of the terminal antenna. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a top view of the structure of the Beisan low-profile short message terminal antenna of the utility model;

[0013] Figure 2 This is the structural front view of the utility model;

[0014] Figure 3 It is a structural schematic diagram of the utility model from a viewing angle.

[0015] In the figure: 1 circuit board, 2 microstrip line, 3 antenna branch No. 1, 301 second feed source, 302 first feed source, 4 antenna branch No. 2, 401 high-frequency dielectric board, 402 antenna radiator, 5 antenna branch No. 3, 501 third feed source, 6 antenna branch No. 4, 601 fourth feed source, 7 debugging antenna, 8 first bridge, 9 second bridge, 10 cable No. 1, 11 cable No. 2, 12 cable No. 3. DETAILED DESCRIPTION

[0016] 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 in 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.

[0017] See also Figure 1-3 , which provides a technical solution for the utility model, a North Three low-profile short message terminal antenna, including a circuit board 1, and a circularly polarized antenna A and a circularly polarized antenna B installed on the circuit board 1, the circularly polarized antenna A is arranged on the left side of the top of the circuit board 1, the circularly polarized antenna A is composed of a No. 1 antenna branch 3, a No. 2 antenna branch 4 and a first bridge 8, and the No. 1 antenna branch 3 is perpendicular to the No. 2 antenna branch 4 to form an inverted L-shaped antenna A connected to the circuit board 1, the circularly polarized antenna B is arranged on the right side of the top of the circuit board 1, the circularly polarized antenna B is composed of a No. 3 antenna branch 5, a No. 4 antenna branch 6 and a second bridge 9, the No. 3 antenna branch 5 is perpendicular to the No. 4 antenna branch 6 to form an inverted L-shaped antenna B connected to the circuit board 1, and the No. 4 antenna branch 6, the No. 3 antenna branch 5, the No. 2 antenna branch 4, and the No. 1 antenna branch 3 are sequentially enclosed in an overall shape that is a "U"-shaped structure, so that the L-shaped antenna A and the L-shaped antenna B form a "U"-shaped antenna direction, In this way, the North Three low-profile short message terminal antenna has omnidirectional characteristics to meet the communication work needs of various equipment postures; the electromagnetic energy radiated by the No. 4 antenna branch 6, the No. 3 antenna branch 5, the No. 2 antenna branch 4, and the No. 1 antenna branch 3 covers at least three working frequency bands, and the working frequency bands include but are not limited to the WIFI frequency band and the GPS frequency band; wherein a microstrip line 2 is arranged in the middle of the top of the circuit board 1, and the first bridge 8 and the microstrip line 2, as well as the second bridge 9 and the microstrip line 2, all form a 90-degree phase difference to generate circularly polarized radiation and utilize coupling to generate two orthogonal circularly polarized modes; wherein a cable assembly is electrically connected to the bottom of the circuit board 1, and the number of cables in the cable assembly is set to at least two. Preferably, the number of cables in the cable assembly can be set to three, namely, No. 1 cable 10, No. 2 cable 11 and No. 3 cable 12. The setting of No. 1 cable 10, No. 2 cable 11 and No. 3 cable 12 can be used for the transmission and distribution of electric energy, and has the characteristics of internal power supply and external insulation.

[0018] In this embodiment, the Beisan low-profile short message terminal antenna also includes four feed sources, which are used to transmit initial electromagnetic energy to the antenna branches to radiate electromagnetic energy based on the antenna branches. One of the four feed sources is electrically connected to antenna branch No. 3, another feed source is electrically connected to antenna branch No. 2 4, and the remaining two feed sources are electrically connected to antenna branch No. 3 5 and antenna branch No. 4 6 respectively; wherein the four feed sources include a first feed source 302, a second feed source 301, a third feed source 501 and a fourth feed source 601, the first feed source 302 is electrically connected to antenna branch No. 3, the second feed source 301 is electrically connected to antenna branch No. 2 4, the third feed source 501 is electrically connected to antenna branch No. 3, and the fourth feed source 601 is electrically connected to antenna branch No. 4 6.

[0019] It should be noted that the L-shaped antenna A formed by the first antenna branch 3 and the second antenna branch 4, and the L-shaped antenna B formed by the third antenna branch 5 and the fourth antenna branch 6 both adopt but are not limited to PIFA antennas or monopole antennas, and the operating frequency of the L-shaped antenna A formed by the first antenna branch 3 and the second antenna branch 4 is equal to the operating frequency band of the first bridge 8, and the operating frequency of the L-shaped antenna B formed by the third antenna branch 5 and the fourth antenna branch 6 is equal to the operating frequency band of the second bridge 9; wherein, the first bridge 8 and the second bridge 9 both adopt but are not limited to 3D bridges, and the setting of the first bridge 8 or the second bridge 9 can perform 90-degree phase shift feeding to allow the L-shaped antenna to form left-hand circular polarization or right-hand circular polarization.

[0020] In this embodiment, the Beidou three low-profile short message terminal antenna also includes a debugging antenna 7 installed at the center position above the circuit board 1, and the debugging antenna 7 is used to debug the radiation surface of the L-shaped antenna A / B to confirm the operating frequency of the L-shaped antenna A / B, and the debugging antenna 7, the L-shaped antenna A and the L-shaped antenna B together constitute the Beidou transceiver and positioning system, and the debugging antenna 7 is used to form a filter circuit with respective frequency bands to improve the antenna's transceiver isolation; the antenna branches No. 4 antenna branch 6, No. 3 antenna branch 5, No. 2 antenna branch 4, and No. 1 antenna branch 3 all include a high-frequency dielectric plate 401 and an antenna radiator 402 arranged on the front of the high-frequency dielectric plate 401, the dielectric constant of the high-frequency dielectric plate 401 is 2-16, and the antenna radiator 402 is The length does not exceed one quarter wavelength of the operating frequency of the L-shaped antenna A / B, and the vertical height of the antenna radiator 402 does not exceed the board height of the high-frequency dielectric board 401; wherein, the first antenna branch 3 and the second antenna branch 4 are vertically orthogonally distributed so that the current passing through the antenna generates a horizontal component and a vertical component; the third antenna branch 5 and the fourth antenna branch 6 are vertically orthogonally distributed so that the current passing through the antenna generates a horizontal component and a vertical component, the first antenna branch 3 and the third antenna branch 5 are flush with each other, and the second antenna branch 4 and the fourth antenna branch 6 are flush with each other; wherein, the antenna branches of the fourth antenna branch 6, the third antenna branch 5, the second antenna branch 4, and the first antenna branch 3 can also be made of metals such as but not limited to aluminum and copper.

[0021] The Beisan low-profile short message terminal antenna, since the mentioned L-shaped antenna A can be a positioning antenna, a transmitting antenna or a receiving antenna, and the mentioned L-shaped antenna B can be a positioning antenna, a transmitting antenna or a receiving antenna, the terminal antenna can realize a variety of combined antenna forms: positioning antenna and transmitting antenna; positioning antenna and receiving antenna; transmitting antenna and receiving antenna; wherein, the overall length of the Beisan low-profile short message terminal antenna can be between 20mm-60mm, so that the cross-section of the terminal antenna can be compressed, greatly reducing the overall thickness of the terminal antenna; the Beisan low-profile short message terminal antenna can be used in scenarios such as wireless terminal equipment or mobile terminal equipment positioning or long-distance communication.

[0022] The technical features of the above embodiments may be combined arbitrarily. To make the description concise, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0023] The above embodiments only express the preferred implementation methods of the utility model, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the utility model patent. It should be understood that, for ordinary technicians in this field, several modifications and improvements can be made without departing from the concept of the utility model, and these all belong to the protection scope of the utility model. In the utility model, unless otherwise clearly specified and limited, the terms "installation", "connection", "connection", "fixation" and the like should be understood in a broad sense, for example, it can be a fixed connection, or a detachable connection, or integrated; it can be a mechanical connection; it can be directly connected, or indirectly connected through an intermediate medium, it can be the internal connection of two components or the interaction relationship between two components; among them, there are many ways of detachable installation, for example, it can be through the method of plug-in and snap-fit, for example, through the method of bolt connection, etc.

[0024] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A Beisan low-profile short message terminal antenna, characterized in that: The invention comprises a circuit board, and a circular polarization antenna A and a circular polarization antenna B installed on the circuit board, wherein the circular polarization antenna A is arranged on the left side of the top end of the circuit board, the circular polarization antenna A is composed of a No. 1 antenna branch, a No. 2 antenna branch and a first bridge, and the No. 1 antenna branch is perpendicularly orthogonal to the No. 2 antenna branch to form an inverted L-shaped antenna A connected to the circuit board, and the circular polarization antenna B is arranged on the right side of the top end of the circuit board, the circular polarization antenna B is composed of a No. 3 antenna branch, a No. 4 antenna branch and a second bridge, the No. 3 antenna branch is perpendicularly orthogonal to the No. 4 antenna branch to form an inverted L-shaped antenna B connected to the circuit board, and the No. 4 antenna branch, the No. 3 antenna branch, the No. 2 antenna branch and the No. 1 antenna branch are sequentially enclosed in an overall shape of a "U"-shaped structure; a microstrip line is arranged in the middle of the top end of the circuit board, the first bridge and the microstrip line, and the second bridge and the microstrip line all form a 90-degree phase difference to generate circularly polarized radiation and utilize coupling to generate two orthogonal circularly polarized modes.

2. The Beisan low profile short message terminal antenna according to claim 1, characterized in that: It also includes four feed sources, which are used to transmit initial electromagnetic energy to the antenna branches to radiate electromagnetic energy based on the antenna branches. One of the four feed sources is electrically connected to antenna branch No. 1, another feed source is electrically connected to antenna branch No. 2, and the remaining two feed sources are electrically connected to antenna branch No. 3 and antenna branch No. 4 respectively.

3. The Beisan low profile short message terminal antenna according to claim 1, characterized in that: The L-shaped antenna A formed by the No. 1 antenna branch and the No. 2 antenna branch, and the L-shaped antenna B formed by the No. 3 antenna branch and the No. 4 antenna branch both use PIFA antennas or monopole antennas. The operating frequency of the L-shaped antenna A formed by the No. 1 antenna branch and the No. 2 antenna branch is equal to the operating frequency band of the first bridge, and the operating frequency of the L-shaped antenna B formed by the No. 3 antenna branch and the No. 4 antenna branch is equal to the operating frequency band of the second bridge.

4. The Beisan low profile short message terminal antenna according to claim 1, characterized in that: It also includes a debugging antenna installed at the center position above the circuit board, which is used to debug the radiation surface of the L-shaped antenna A / B to confirm the operating frequency of the L-shaped antenna A / B. The debugging antenna, L-shaped antenna A and L-shaped antenna B together constitute a Beidou transceiver and positioning system.

5. The Beisan low profile short message terminal antenna according to claim 1, characterized in that: The antenna branches No. 4, No. 3, No. 2 and No. 1 all include a high-frequency dielectric plate and an antenna radiator arranged on the front of the high-frequency dielectric plate, and the dielectric constant of the high-frequency dielectric plate is 2-16.

6. The Beisan low profile short message terminal antenna according to claim 5, characterized in that: The length of the antenna radiator does not exceed one quarter of the wavelength of the operating frequency of the L-shaped antenna A / B.

7. The Beisan low profile short message terminal antenna according to claim 1, characterized in that: The bottom of the circuit board is electrically connected with a cable assembly, and the number of cables in the cable assembly is at least two.

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