A multi-frequency and multi-polarization co-body antenna

Abstract

The present invention discloses a multi-frequency multi-polarization common body antenna, which belongs to the field of antenna technology, and comprises a reflector, wherein the bottom end of the reflector is fixedly connected to an antenna base, a radio frequency circuit is arranged in the antenna base, a medium is fixedly connected to the top end of the reflector, a common radiator is fixedly connected to the top end of the medium, a first feeding probe is arranged on the common radiator, and a plurality of feeding probe groups are arranged outside the first feeding probe. Through the arrangement of the common radiator, the present invention can make the GNSS and radio antennas share the same common radiator without affecting the performance of the GNSS and radio antennas, thereby achieving high integration, reducing the volume of the antenna, increasing the antenna utilization rate, and reducing the weight of the antenna. At the same time, the arrangement of the second feeding probe and the connecting component together constitute a feeding probe group, which can be used for feeding circularly polarized antennas, and for adjusting the frequency point and polarization characteristics of linearly polarized antennas.

Description

Technical Field

[0001] The present invention relates to the field of antenna technology, and in particular to a multi-frequency and multi-polarization co-body antenna. Background Art

[0002] With the development of Internet of Things technology, GNSS navigation and high-precision positioning equipment are becoming more and more functional. In order to get rid of the differential constraints brought by large amounts of data and improve long-distance operation communications and operation efficiency, it is also necessary to increase the function of high-performance UHF / VHF omnidirectional antenna communication. The traditional radio antenna design in the industry is basically implemented externally and separately, and most of them are whip-shaped, rod-shaped and other structures, which are large in size and inconvenient to carry.

[0003] With the trend of miniaturization and lightness of RTK positioning equipment, the present invention can complete high-performance radio mode operations without an external radio antenna without increasing the size of RTK. The highly integrated GNSS and radio antenna make the equipment more simple and convenient, reduce accessories, and make field work simpler, thus solving the pain points of the industry. Summary of the invention

[0004] The purpose of the present invention is to solve the problem in the prior art that two antennas need to be used in coordination and are large in size, and to propose a multi-frequency and multi-polarization co-body antenna.

[0005] In order to achieve the above object, the present invention adopts the following technical solutions:

[0006] A multi-frequency and multi-polarization common body antenna comprises a reflector, the bottom end of which is fixedly connected to an antenna base, a radio frequency circuit is arranged in the antenna base, the top end of the reflector is fixedly connected to a medium, the top end of the medium is fixedly connected to a common radiator, a first feeding probe is arranged on the common radiator, and a plurality of feeding probe groups are arranged outside the first feeding probe.

[0007] Preferably, the common radiator is a radiator shared by a circular polarization antenna and a linear polarization antenna, and the frequency of the circular polarization antenna is higher than the frequency of the linear polarization antenna.

[0008] Preferably, the feeding probe group of the circular polarization antenna and the frequency point and polarization adjustment branch node of the linear polarization antenna are the same conductive path.

[0009] Preferably, the feeding probe group plays a role of feeding the circularly polarized antenna, and the feeding probe group plays a role of adjusting the frequency point and polarization characteristics of the linearly polarized antenna.

[0010] Preferably, the feeding probe group includes a second feeding probe and a first connecting component, and the connecting component connects the second feeding probe and the reflecting plate respectively, plays a role of high-resistance isolation for the circularly polarized antenna, and plays a role of low-loss direct connection for the linearly polarized antenna.

[0011] Preferably, the feeding probe group further includes a connecting probe, and the first connecting component is respectively connected to the second feeding probe and the reflecting plate, plays a role of impedance matching for the circular polarization antenna, and plays a role of high-impedance isolation for the linear polarization antenna.

[0012] Preferably, a second connecting component is provided between the first feeding probe and the ground, and the second connecting component has a direct-pass or high-impedance characteristic for the circular polarization frequency band and plays a matching role for the linear polarization antenna.

[0013] Compared with the prior art, the present invention has the following beneficial effects:

[0014] 1. In this solution, by setting a common radiator, the GNSS and radio antennas can share the same common radiator without affecting the performance of the GNSS and radio antennas, thereby achieving high integration, reducing the size of the antenna, increasing the antenna utilization rate, and reducing the weight of the antenna.

[0015] 2. In this solution, the feeding probe group composed of the second feeding probe and the first connecting component can be used for feeding the circularly polarized antenna and adjusting the frequency and polarization characteristics of the UHF linearly polarized antenna.

[0016] 3. In this scheme, by setting up the connection probe, it can play a matching characteristic role for the circularly polarized antenna, and play a role of low-loss direct-through characteristics between the linearly polarized antenna and the reflecting surface. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 A schematic diagram of the structure of a multi-frequency and multi-polarization co-body antenna proposed by the present invention;

[0018] Figure 2 A schematic diagram of the structure of a common radiator in a multi-frequency and multi-polarization common antenna proposed by the present invention;

[0019] Figure 3 A schematic diagram of the structure of a slot in a multi-frequency and multi-polarization co-body antenna proposed by the present invention;

[0020] Figure 4 This is a schematic diagram of the exploded structure of a multi-frequency and multi-polarization co-body antenna proposed by the present invention;

[0021] Figure 5 A feeding schematic diagram of a first embodiment of a multi-frequency and multi-polarization co-body antenna proposed by the present invention;

[0022] Figure 6 A feeding schematic diagram of a second embodiment of a multi-frequency and multi-polarization co-body antenna proposed by the present invention;

[0023] Figure 7This is a performance simulation diagram of a GNSS antenna in a multi-frequency and multi-polarization co-body antenna proposed in the present invention;

[0024] Figure 8 This is a performance simulation diagram of the radio station antenna in a multi-frequency and multi-polarization co-body antenna proposed in the present invention.

[0025] In the figure: 1, reflector; 2, antenna base; 3, interface; 4, medium; 5, common radiator; 6, second feeding probe; 7, connecting probe; 8, first feeding probe; 9, first connecting component; 10, second connecting component; A, gap. DETAILED DESCRIPTION

[0026] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0027] Reference Figure 1-8 A multi-frequency multi-polarization common body antenna comprises a reflector 1, the bottom end of the reflector 1 is fixedly connected to an antenna base 2, a radio frequency circuit is arranged in the antenna base 2, an interface 3 is arranged on the antenna base 2, a medium 4 is fixedly connected to the top of the reflector 1, and a common radiator 5 is fixedly connected to the top of the medium 4;

[0028] Furthermore, the common radiator 5 is a radiator shared by the circular polarization antenna and the linear polarization antenna, and the frequency point of the circular polarization antenna is higher than the frequency point of the linear polarization antenna;

[0029] It should be noted that: the multi-frequency and multi-polarization co-body antenna specifically includes a circularly polarized full-frequency GNSS antenna and a linearly polarized UHF radio antenna. The co-body antenna includes, from bottom to top, a reflector 1, a radio frequency circuit attached to the reflective surface of the reflector 1, a medium 4, a feeding probe group and a first feeding probe (wherein the feeding probe group completes the feeding of the GNSS antenna, and the first feeding probe completes the feeding of the radio antenna), and a common radiator 5 of the circularly polarized antenna and the linearly polarized antenna;

[0030] A further advantage of adopting the above method is that the GNSS and radio antennas can share the same common radiator 5 without affecting the performance of the GNSS and radio antennas, thereby achieving high integration.

[0031] A gap A is formed on the common radiator 5 , a first feeding probe 8 is arranged on the common radiator 5 , and a plurality of feeding probe groups are arranged outside the first feeding probe 8 .

[0032] Embodiment 1

[0033] The feeding probe group is composed of a second feeding probe 6 and a first connecting component 9. The two ends of the feeding probe group are respectively connected to the end face of the common radiator 5 and the end face of the reflecting plate 1. The feeding probe group of the circularly polarized antenna and the frequency point and polarization adjustment branch of the linearly polarized antenna are the same conductive path. The feeding probe group plays a feeding role for the circularly polarized antenna, and the feeding probe group plays a role in adjusting the frequency point and polarization characteristics of the linearly polarized antenna. A first connecting component 9 is arranged between the feeding probe group and the reflecting plate 1. For the linearly polarized antenna, the feeding probe group and the ground maintain a low-loss direct-through characteristic. A second connecting component 10 is arranged between the first feeding probe 8 and the ground, and this component has a direct-through or high-impedance characteristic for the circularly polarized frequency band, and plays a matching role for the linearly polarized antenna. The common radiator 5 can be a microstrip slot antenna, that is, a slot A is opened on the common radiator 5;

[0034] It should be noted that: refer to the attached Figure 3 , the GNSS antenna adopts a slot form, the UHF antenna and the GNSS antenna share a common radiator 5, the common radiator 5 is provided with a slot A, the size of the slot A is strongly related to the frequency of the GNSS antenna, and the outer size of the common radiator 5 is strongly related to the frequency of the UHF antenna, then the second feeding probe 6 feeds the GNSS circularly polarized antenna, there is a first connecting component 9 between the second feeding probe 6 and the reflecting surface of the reflecting plate 1, the first connecting component 9 and the second feeding probe 6 together form a feeding probe group. In addition to being used for feeding the circularly polarized antenna, the feeding probe group plays a role in adjusting the frequency and polarization characteristics of the UHF linear polarization antenna, that is, the feeding of the GNSS circularly polarized antenna and the frequency and polarization adjustment branch of the UHF linear polarization antenna are the same conductive path - the feeding probe group, there is a first connecting component 9 between the second feeding probe 6 and the ground, this component presents a direct-through low-loss characteristic for the linear polarization frequency band, and presents a high-impedance characteristic or matching characteristic for the circularly polarized frequency band;

[0035] The GNSS circularly polarized antenna adopts a low-profile integrated solution. The multiple second feeding probes 6 of the GNSS circularly polarized antenna and the first connecting component 9 (between the second feeding probe 6 and the ground) together constitute a feeding probe group. The first connecting component 9 presents a direct-through low-loss characteristic for the UHF frequency band and a high-impedance characteristic or matching characteristic for the circularly polarized frequency band. The GNSS circularly polarized antenna and the UHF linearly polarized antenna share a common radiator 5, thereby realizing a multi-polarization and multi-frequency co-body.

[0036] Embodiment 2

[0037] The feeding probe group is composed of a second feeding probe 6 and a first connecting component 9. The feeding probe group also includes a connecting probe 7. The connecting probe 7 mainly plays a matching characteristic for the circular polarization antenna and mainly plays a low-loss direct characteristic between the linear polarization antenna and the reflecting surface;

[0038] It should be noted that: the feeding probe group includes not only the second feeding probe 6 and the first connecting component 9, but also the connecting probe 7. In this case, the first connecting component 9 has a high-impedance isolation characteristic for both the circularly polarized antenna and the linearly polarized antenna, and the connecting probe 7 is respectively connected to the radiating surface of the common radiator 5 and the reflecting surface of the reflecting plate 1 (directly or indirectly connected). The connecting probe 7 mainly has a matching characteristic for the circularly polarized antenna, and mainly has a low-loss direct-through characteristic between the linearly polarized antenna and the reflecting surface;

[0039] The GNSS antenna adopts a double-layer microstrip solution, and multiple groups of second feeding probes feed the low frequency band of the GNSS. The first connecting component 9 between the second feeding probe 6 and the ground presents a direct low-loss characteristic for the UHF frequency band, and a high impedance characteristic or matching characteristic for the GNSS low frequency band. The GNSS low frequency band antenna and the UHF linear polarization antenna share a common radiator 5, thereby realizing a multi-polarization and multi-frequency co-body.

[0040] Reference Figure 5 The feeding probe group only includes a plurality of second feeding probes 6, and the first connecting component 9 between the plurality of second feeding probes 6 and the reflecting surface of the reflecting plate 1 presents a direct low-loss characteristic for the linear polarization antenna frequency band and a high-impedance isolation characteristic for the circular polarization frequency band;

[0041] Reference Figure 6 , there are multiple groups of connecting probes 7 around the multiple groups of second feeding probes 6, and a first connecting component 9 is distributed between each second feeding probe 6 and the reflecting surface of the reflecting plate 1. The component has a high-impedance isolation characteristic for both the circularly polarized antenna and the linearly polarized antenna. The connecting probe 7 is respectively connected to the radiating surface of the common radiator 5 and the reflecting surface of the reflecting plate 1 (directly or indirectly connected). The connecting probe 7 mainly has a matching characteristic for the circularly polarized antenna and a low-loss direct-through characteristic between the reflecting surface of the reflecting plate 1 and the linearly polarized antenna. The second feeding probe 6 and the connecting probe 7 together constitute a feeding probe group;

[0042] Compared with conventional radio stations that mostly use external whip antennas, which are large in size and difficult to carry, the RTK device with radio in this solution, because the GNSS antenna and the radio antenna share a common radiator 5, does not require an external radio antenna to complete high-performance radio mode operations. The size of the RTK is significantly reduced, the equipment is simpler and more convenient, and the field work is simpler. Without affecting the antenna performance, the size of the antenna is reduced, the antenna utilization rate is increased, and the antenna weight is reduced.

[0043] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A multi-frequency multi-polarization common body antenna, comprising a reflector (1), characterized in that: The bottom end of the reflector (1) is fixedly connected to an antenna base (2), a radio frequency circuit is arranged inside the antenna base (2), the top end of the reflector (1) is fixedly connected to a medium (4), the top end of the medium (4) is fixedly connected to a common radiator (5), a first feeding probe (8) is arranged on the common radiator (5), and a plurality of feeding probe groups are arranged outside the first feeding probe (8); The common radiator (5) is a common radiator for the circular polarization antenna and the linear polarization antenna, the frequency point of the circular polarization antenna is higher than the frequency point of the linear polarization antenna, the feeding probe group plays a feeding role for the circular polarization antenna, and the feeding probe group plays a role in adjusting the frequency point and polarization characteristics of the linear polarization antenna; The feeding probe group comprises a second feeding probe (6) and a first connecting component (9). In the UHF frequency band, the first connecting component (9) is respectively connected to the second feeding probe (6) and the reflecting plate (1), and plays a role of high-impedance isolation for the circularly polarized antenna and a role of low-loss direct pass for the linearly polarized antenna. The feeding probe group also comprises a connecting probe (7). In the GNSS low frequency band, the first connecting component (9) is respectively connected to the second feeding probe (6) and the reflecting plate (1), and plays a role of impedance matching for the circularly polarized antenna and a role of high-impedance isolation for the linearly polarized antenna. A second connecting component (10) is arranged between the first feeding probe (8) and the ground, and this component has a direct pass or high-impedance characteristic for the circularly polarized frequency band and plays a matching role for the linearly polarized antenna. The circularly polarized antenna is a circularly polarized GNSS antenna, and the linearly polarized antenna is a UHF linearly polarized antenna.

2. The multi-frequency and multi-polarization co-body antenna according to claim 1, characterized in that: The feeding probe group of the circular polarization antenna and the frequency point and polarization adjustment branch of the linear polarization antenna are in the same conductive path.

Images