Broadband navigation antenna based on RIS structure

Abstract

The utility model relates to a broadband navigation antenna based on an RIS structure, which comprises an antenna shell and an antenna assembly, the antenna assembly comprises a dielectric substrate unit, a radiation oscillator unit, an RIS structure and a signal line, and the dielectric substrate unit comprises a first dielectric substrate, a second dielectric substrate, a third dielectric substrate and a fourth dielectric substrate which are sequentially arranged; the radiation oscillator unit comprises a first radiation oscillator arranged on the first dielectric substrate and a second radiation oscillator arranged on the second dielectric substrate; the RIS structure is arranged on the third dielectric substrate, the signal line is connected to the fourth dielectric substrate to output signals, and the first radiation oscillator, the second radiation oscillator and the RIS structure are connected with the fourth dielectric substrate. According to the multilayer structure, the height is increased, the Q value is reduced, and the bandwidth is improved; the RIS structure with the pure reactance characteristic realizes miniaturization and broadband under the condition that the radiation characteristic of the antenna is not influenced; the antenna can cover-10dB impedance bandwidth, can cover full frequency band, and is suitable for various navigation systems.

Description

TECHNICAL FIELD

[0001] The utility model relates to a car antenna technology, concretely relates to a wideband navigation antenna based on RIS structure. BACKGROUND

[0002] The car antenna is an important component in the car communication system, which is responsible for receiving and sending wireless signals to realize the communication function between the inside and outside of the vehicle.

[0003] At present, high-precision navigation is widely used, and in the field of new energy vehicles, high-precision maps are particularly needed to assist users in driving, so the requirements for navigation antennas are also getting higher and higher, and a navigation antenna is needed to cover the full frequency band to improve the positioning accuracy. Most of the existing navigation antennas use high dielectric constant media such as ceramics to reduce the size, and the high dielectric constant media is generally not conducive to expanding the bandwidth, and once the bandwidth is narrow, it is difficult to cover the full frequency band, and the cost of media such as ceramics is also relatively high. SUMMARY

[0004] The utility model aims at providing a wideband navigation antenna based on RIS structure.

[0005] In order to achieve the above purpose, the utility model adopts the technical scheme that:

[0006] A wideband navigation antenna based on RIS structure, antenna shell, antenna assembly, the antenna assembly is arranged in the antenna shell,

[0007] The antenna assembly includes a medium substrate unit, a radiation oscillator unit, an RIS structure, and a signal line, the medium substrate unit includes a first medium substrate, a second medium substrate, a third medium substrate, and a fourth medium substrate, the first medium substrate, the second medium substrate, the third medium substrate, and the fourth medium substrate are arranged in sequence, the radiation oscillator unit includes a first radiation oscillator and a second radiation oscillator, the first radiation oscillator is arranged on the first medium substrate, and the second radiation oscillator is arranged on the second medium substrate, the RIS structure is arranged on the third medium substrate, the signal line is connected to the fourth medium substrate, the first radiation oscillator, the second radiation oscillator, and the RIS structure are connected to the fourth medium substrate, and the signal line outputs signals out of the antenna shell.

[0008] Preferably, the fourth medium substrate is provided with an LC bridge, the LC bridge has a lower cost than a general 3dB bridge, and has stronger adjustability.

[0009] Preferably, the RIS structure includes a plurality of RIS units arranged in cycles, and the cycle arrangement is a two-dimensional or three-dimensional array arrangement.

[0010] Preferably, the antenna assembly further comprises a director, which is arranged on the inner surface of the antenna housing and faces the first dielectric substrate, and functions to improve the directional gain.

[0011] Further preferably, the director, the first radiating element and the second radiating element are circular.

[0012] Further preferably, the director, the first radiating element, the second radiating element and the signal line are coaxially arranged.

[0013] Preferably, the antenna comprises a coaxial feeding probe, and the first radiating element, the second radiating element and the RIS structure are connected to the fourth dielectric substrate through the coaxial feeding probe.

[0014] Further preferably, one end of the coaxial feeding probe is connected to the first radiating element, and the other end of the coaxial feeding probe sequentially passes through the second radiating element and the RIS structure and is connected to the fourth dielectric substrate.

[0015] Preferably, the first radiating element is configured to excite a frequency of 1550-1650MHz, and the second radiating element is configured to excite a frequency of 1160-1300MHz.

[0016] Preferably, the antenna is configured to cover an impedance bandwidth of -10dB of 1.11-1.65GHz.

[0017] Preferably, the signal line is a Fakra wire harness.

[0018] Preferably, the antenna housing comprises a bottom shell and an upper cover, and the bottom shell and the upper cover enclose a setting space, and the antenna assembly is arranged in the setting space.

[0019] Thanks to the above technical scheme, the present application has the following advantages over the prior art:

[0020] 1. The present application increases the height through the multi-layer structure of the dielectric substrate unit, reduces the Q value and improves the bandwidth at the same time.

[0021] 2. The present application sets the RIS structure with pure reactance characteristics, reduces the size without affecting the antenna radiation characteristics, and realizes miniaturization and broadband.

[0022] 3, The utility model has wide bandwidth, can cover 1.11~1.65GHz (-10dB impedance bandwidth), can cover full frequency band and apply to various navigation systems. BRIEF DESCRIPTION OF DRAWINGS

[0023] ATTACH Figure 1 It is assembly structure schematic diagram of utility model;

[0024] ATTACH Figure 2 It is split structure schematic diagram of utility model.

[0025] In the above drawings:

[0026] 1, Antenna shell;10, bottom shell;11, upper cover;

[0027] 200, first dielectric substrate;201, second dielectric substrate;202, third dielectric substrate;203, fourth dielectric substrate;

[0028] 210, first radiation oscillator;211, second radiation oscillator;

[0029] 22, RIS structure;23, signal line;24, coaxial feed probe;25, director. DETAILED DESCRIPTION

[0030] The technical scheme of the utility model will be described below in conjunction with the drawings, obviously, the described embodiment is a part of the embodiment of the utility model, instead of all the embodiments. Based on the embodiment in the utility model, all other embodiments obtained by the ordinary skill in the art without making creative labor belong to the scope of protection of the utility model.

[0031] In the description of the utility model, it is necessary to explain that the orientation or position relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" and the like is based on the orientation or position relationship shown in the drawings, and is only for the convenience of describing the utility model and simplifying the description, and does not indicate or imply that the indicated device or element must have a particular orientation, be constructed and operated in a particular orientation, therefore, it cannot be understood as a limitation on the utility model. In addition, the terms "first", "second", "third" are only for the purpose of description, and cannot be understood as indicating or implying relative importance.

[0032] As Figure 1 Shown in the drawings, a kind of wideband navigation antenna based on RIS structure, antenna shell 1, antenna assembly, antenna assembly is arranged in the inside of antenna shell 1.Specifically:

[0033] The antenna housing 1 comprises a bottom shell 10 and an upper cover 11, the upper cover 11 covers the bottom shell 10, and a setting space is enclosed between the two, and the antenna assembly is arranged in the setting space.

[0034] The antenna assembly comprises a dielectric substrate unit, a radiation oscillator unit, an RIS structure 22, a signal line 23, etc.

[0035] The dielectric substrate unit comprises a first dielectric substrate 200, a second dielectric substrate 201, a third dielectric substrate 202, and a fourth dielectric substrate 203, which are arranged in sequence, and in the illustration, they are arranged in the antenna housing 1 from top to bottom, and each dielectric substrate is fixed by the antenna housing 1.

[0036] The radiation oscillator unit comprises a first radiation oscillator 210 and a second radiation oscillator 211, the first radiation oscillator 210 is arranged on the first dielectric substrate 200, and the second radiation oscillator 211 is arranged on the second dielectric substrate 201, and both the first radiation oscillator 210 and the second radiation oscillator 211 are circular. Among them: the first radiation oscillator 210 is configured to excite a frequency of 1550-1650MHz; the second radiation oscillator 211 is configured to excite a frequency of 1160-1300MHz.

[0037] The RIS structure 22 is arranged on the third dielectric substrate 202, and plays a role of shifting frequency and improving bandwidth. In this embodiment: the RIS structure comprises a plurality of RIS units arranged in a period, and the period arrangement is specifically a two-dimensional or three-dimensional array arrangement.

[0038] The signal line 23 is connected to the fourth dielectric substrate 203, and the signal line 23 is a Fakra wire harness, and the signal line 23 penetrates out of the antenna housing 1 to output a signal.

[0039] The first radiation oscillator 210, the second radiation oscillator 211, and the signal line 23 are coaxially arranged, and the first radiation oscillator 210, the second radiation oscillator 211, the RIS structure 22, and the fourth dielectric substrate 203 are connected and output through the signal line 23. In this embodiment: the antenna comprises a coaxial feeding probe 24, and the first radiation oscillator 210, the second radiation oscillator 211, and the RIS structure are connected to the fourth dielectric substrate 203 through the coaxial feeding probe 24. Specifically: one end of the coaxial feeding probe 24 is connected to the first radiation oscillator 210, and the other end of the coaxial feeding probe 24 penetrates through the second radiation oscillator 211, the RIS structure 22, and the connection of the fourth dielectric substrate 203 in sequence.

[0040] In a preferred embodiment of the present embodiment: the fourth dielectric substrate is provided with an LC bridge, the LC bridge is a bridge circuit composed of inductance (L) and capacitance (C), the structure is similar to Wheatstone bridge, but the bridge arm contains L or C element, the LC bridge has lower cost and stronger adjustability compared with general 3dB bridge.

[0041] In a preferred embodiment of the present embodiment: the antenna assembly further comprises a director 25, which plays a role of improving directional gain, the director 25 also adopts a circular shape, the director 25 is arranged on the inner surface of the antenna shell 1 and faces the first dielectric substrate 200, that is, the director 25 is arranged on the inner surface of the upper cover 11, and the director 25, the first radiating vibrator 210, the second radiating vibrator 211 and the signal line 23 are coaxially arranged.

[0042] As shown in the figure, the antenna of the present embodiment has a wide bandwidth, can cover 1.11-1.65GHz (-10dB impedance bandwidth), and has higher directional gain and better axial ratio in the bandwidth.

[0043] The above embodiment is only for illustrating the technical concept and characteristics of the present application, the purpose is to enable the person skilled in the art to understand the content of the present application and to implement it, and cannot limit the protection scope of the present application. Any equivalent changes or modifications made according to the spirit and essence of the present application shall be covered within the protection scope of the present application.

Claims

1. A wideband navigation antenna based on RIS structure, an antenna shell, an antenna assembly, the antenna assembly is arranged in the antenna shell, characterized in that: the antenna assembly comprises a dielectric substrate unit, a radiation oscillator unit, an RIS structure and a signal line, the dielectric substrate unit comprises a first dielectric substrate, a second dielectric substrate, a third dielectric substrate and a fourth dielectric substrate, the first dielectric substrate, the second dielectric substrate, the third dielectric substrate and the fourth dielectric substrate are arranged in sequence, the radiation oscillator unit comprises a first radiation oscillator and a second radiation oscillator, the first radiation oscillator is arranged on the first dielectric substrate, and the second radiation oscillator is arranged on the second dielectric substrate, the RIS structure is arranged on the third dielectric substrate, the signal line is connected to the fourth dielectric substrate, the first radiation oscillator, the second radiation oscillator and the RIS structure are connected to the fourth dielectric substrate, and the signal line outputs a signal out of the antenna shell.

2. The RIS structure based wideband navigation antenna of claim 1, wherein: an LC bridge is arranged on the fourth dielectric substrate; the RIS structure comprises a plurality of RIS units arranged in a period, and the period arrangement is a two-dimensional or three-dimensional array arrangement.

3. The RIS structure based wideband navigation antenna of claim 1, wherein: the antenna assembly further comprises a director, the director is arranged on an inner surface of the antenna shell and faces the first dielectric substrate.

4. The RIS structure based wideband navigation antenna of claim 3, wherein: the director, the first radiation oscillator and the second radiation oscillator are circular. the director, the first radiation oscillator, the second radiation oscillator and the signal line are coaxially arranged.

5. The RIS structure based wideband navigation antenna of claim 1, wherein: the antenna comprises a coaxial feeding probe, and the first radiation oscillator, the second radiation oscillator and the RIS structure are connected to the fourth dielectric substrate through the coaxial feeding probe.

6. The RIS structure based wideband navigation antenna of claim 5, wherein: one end of the coaxial feeding probe is connected to the first radiation oscillator, and the other end of the coaxial feeding probe is connected to the fourth dielectric substrate through the second radiation oscillator and the RIS structure in sequence.

7. The RIS structure based wideband navigation antenna of claim 1, wherein: the first radiation oscillator is configured to excite a frequency of 1550-1650 MHz, and the second radiation oscillator is configured to excite a frequency of 1160-1300 MHz.

8. The RIS structure based wideband navigation antenna of claim 1, wherein: the antenna is configured to cover an impedance bandwidth of -10 dB of 1.11-1.65 GHz.

9. The RIS structure based wideband navigation antenna of claim 1, wherein: the signal line is a Fakra wire bundle.

10. The RIS structure based wideband navigation antenna of claim 1, wherein: the antenna shell comprises a bottom shell and an upper cover, the bottom shell and the upper cover enclose a setting space, and the antenna assembly is arranged in the setting space.

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