WO2018161598A1

WO2018161598A1 - Reconfigurable slot antenna based on sickle-shaped structure

Info

Publication number: WO2018161598A1
Application number: PCT/CN2017/107201
Authority: WO
Inventors: 曲美君; 邓力; 李书芳; 张贯京; 葛新科; 高伟明; 张红治
Original assignee: 深圳市景程信息科技有限公司
Priority date: 2017-03-04
Filing date: 2017-10-21
Publication date: 2018-09-13
Also published as: CN106785412B; CN106785412A

Abstract

The present invention provides a reconfigurable slot antenna based on a sickle-shaped structure. The reconfigurable slot antenna based on a sickle-shaped structure of the present invention comprises a substrate and a metal plate attached to the upper surface of the substrate. Two horizontally symmetrical sickle-shaped slots are etched on the metal plate. Each sickle-shaped slot comprises a diode. By implementing the present invention, without changing the polarization mode, the frequency and the radiation directional diagram of an antenna are timely changed according to communication requirements, so that the spatial noise of a wireless communication system is reduced, electronic interference is avoided, system security is improved, and the channel capacity is increased.

Description

Reconfigurable slot antenna based on sickle structure

[0001] The present invention relates to the field of satellite communication technologies, and in particular, to a reconfigurable slot antenna based on a sickle structure.

Background technique

[0002] In recent years, with the rapid development and wide application of satellite navigation and satellite communication, antennas as the front-end equipment of these systems, the performance indicators of the performance, for the performance of satellite communication handheld terminals and RFID readers Extremely important role. In addition, in order to facilitate the large-scale popularization and application of satellite communication terminals and radio frequency identification systems, the economic cost and size of the system are all important considerations. As a key component of the circularly polarized antenna, the higher performance index is guaranteed. Under the premise, it must have the characteristics of low cost, compact structure and small size. After feeding the antenna or array antenna, the feed network needs to be designed. Since today's satellite communication systems require multi-frequency, wideband, and miniaturization. However, the existing feeder network is bulky, and it is impossible to reconstruct the frequency and the direction of the class, and when most of the work is at a single frequency, it is not conducive to working under multi-frequency or broadband conditions.

technical problem

[0003] A main object of the present invention is to provide a reconfigurable slot antenna based on a sickle structure, which aims to solve the technical problem that the antenna cannot be reconfigurable in frequency and direction in the prior art.

Problem solution

Technical solution

[0004] In order to achieve the above object, the present invention provides a reconfigurable slot antenna based on a sickle structure, and the reconfigurable slot antenna based on the sickle structure of the present invention includes a substrate and is attached to the upper surface of the substrate. Metal plate

[0005] The metal plate is etched with two left-right symmetric sickle-shaped slits, and the two left-right symmetric sickle-shaped slits are disposed at an intermediate position in a horizontal direction of the metal plate, and each sickle-shaped slit includes an L-shaped shape. a groove and a horizontal transverse groove, wherein a long side of the L-shaped groove is horizontally disposed on the metal plate, and one end of the horizontal horizontal groove is connected to an end of a long side of the L-shaped groove, and the horizontal horizontal groove is located at the The end of the long side of the L-shaped groove Further, a diode is disposed in the short side of the L-shaped groove, and the diode in the one sickle-shaped slit is connected to the diode in the other sickle-shaped slit.

[0006] Preferably, the reconfigurable slot antenna based on the sickle structure is a rectangular parallelepiped structure, the metal plate is a copper surface, and the metal plate has a thickness of 0.5 ounce.

[0007] Preferably, the substrate is a dielectric substrate of FR4, and the substrate has a thickness of 1.6 cm and a dielectric constant of 4.4.

[0008] Preferably, the length of the metal plate is 40 mm, the width of the metal plate is 30 mm, the length of the horizontal horizontal groove in the sickle-shaped slit 110 is 6.7 mm, and the long side of the L-shaped groove The length of the short side of the L-shaped groove is 4 mm, the width of the L-shaped groove and the width of the horizontal lateral groove are both 1 mm, and the distance of the sickle-shaped slit from the bottom edge of the metal plate is 17 mm. The sickle-shaped slit has a distance of 1.5 mm from the side of the metal plate.

[0009] Preferably, when both diodes are turned on, the working frequency band of the reconfigurable slot antenna based on the sickle structure is between 4.64 and 5.36 GHz.

[0010] Preferably, when the two diodes of the sickle-shaped slit are broken, the working frequency band of the reconfigurable slot antenna based on the sickle structure is 3.71-4.62 GHz.

[0011] Preferably, the direction of the E plane of the reconfigurable slot antenna based on the sickle structure is "8", and the H-plane pattern of the reconfigurable slot antenna based on the sickle structure is full Directional.

Advantageous effects of the invention

Beneficial effect

[0012] The present invention adopts the above technical solution, and brings the technical effects as follows: The reconfigurable slot antenna based on the sickle structure of the present invention can change the antenna according to communication requirements while maintaining the polarization mode unchanged. The frequency and radiation pattern, reduce the spatial noise of wireless communication systems, avoid electronic interference, improve system security, increase channel capacity, and are widely used in many aspects such as automotive and aircraft radar and satellite communication networks.

Brief description of the drawing

DRAWINGS

1 is a schematic structural view of a side surface of a reconfigurable slot antenna based on a sickle structure according to the present invention;

2 is a schematic top view of a preferred embodiment of a reconfigurable slot antenna based on a sickle structure of the present invention [0014] 3 is a schematic diagram of a preferred embodiment of an antenna transmission coefficient of four states in a reconfigurable slot antenna based on a sickle structure according to the present invention; [0015] FIG.

4-1 to 4-2 are simulation diagrams of radiation patterns of four states of the reconfigurable slot antenna based on the sickle structure of the present invention.

[0017] The objects, features, and advantages of the present invention will be further described in conjunction with the embodiments.

BEST MODE FOR CARRYING OUT THE INVENTION

The specific embodiments, structures, features and functions of the present invention are described in detail below with reference to the accompanying drawings and preferred embodiments. It is understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

1 to 3, FIG. 1 is a schematic structural view of a side surface of a reconfigurable slot antenna based on a sickle structure according to the present invention; FIG. 2 is a preferred embodiment of a reconfigurable slot antenna based on a sickle structure of the present invention. FIG. 3 is a schematic diagram of a preferred embodiment of an antenna transmission coefficient of four states in a reconfigurable slot antenna based on a sickle structure according to the present invention.

[0020] The reconfigurable slot antenna 1 based on the sickle structure of the present invention includes a substrate 10 and a metal plate 11. In the present embodiment, the reconfigurable slot antenna 1 based on the sickle structure is a rectangular parallelepiped structure in which the metal plate 11 is attached to the upper surface of the substrate 10. The metal plate 11 is a copper surface and has the same thickness. Preferably, the metal plate 11 has a thickness of 0.5 ounces.

[0021] In the embodiment, the substrate 10 is a dielectric substrate of FR4. The thickness of the substrate 10 is preferably 1.6 cm, and the dielectric constant is preferably 4.4.

[0022] The two metal symmetrical serrated slits 110 are etched on the metal plate 11, and the two left and right symmetrical sickle-shaped slits 110 are disposed at an intermediate position in the horizontal direction of the metal plate 11, wherein the boring tool The distance of the slit 110 from the bottom edge of the metal plate 11 is preferably 17 mm, and the distance of the sickle-shaped slit 110 from the side of the metal plate 11 is preferably 1.5 mm.

[0023] Further, the sickle-shaped slit 110 includes an L-shaped groove and a horizontal horizontal groove, wherein a long side of the L-shaped groove is horizontally disposed on the metal plate 10, and one end of the horizontal horizontal groove is The end of the long side of the L-shaped groove The ends are connected, and the horizontal lateral grooves are located above the ends of the long sides of the L-shaped grooves. In addition, a diode is also disposed in the short side of the L-shaped groove. The diode in the one sickle-shaped slit is connected to the diode in the other sickle-shaped slit. As shown in FIG. 2, the two left and right symmetrical blade-shaped slits 110 are respectively provided with a first diode D3 and a second diode D4, wherein the first diode D3 is disposed in the left sickle-shaped slit 11 0 The second diode D4 is disposed in the right side of the sickle-shaped slot 110, and the first diode D3 is electrically connected to the second diode D4.

[0024] The metal plate 11 has a length W and a height L. The thickness of the sickle-shaped slit 110 is the thickness of the metal plate 11, the length of the horizontal lateral groove in the sickle-shaped slit 110 is such that the length of the long side of the L-shaped groove is 1 ₃ , and the length of the short side of the L-shaped groove is 1 4 , The width of the L-shaped groove and the width of the horizontal horizontal groove are both 12.

[0025] It should be noted that the reconfigurable slot antenna 1 based on the sickle structure changes the length of the antenna resonant slot by controlling the state combination of two diodes, thereby realizing frequency reconfigurable. Specifically, by controlling the diode, the frequency can be controlled, that is, the frequency can be adjusted, and an antenna can be adjusted in multiple frequency bands.

[0026] wherein, the use of a sickle-shaped slit can reduce the E-plane (ie, the plane of the wave propagation direction of the reconfigurable slot antenna based on the sickle structure and the direction of the electric field direction). Cross polarization (left-right symmetry, avoiding distortion of the pattern) Improve the radiation performance of the antenna, and realize the miniaturization of the same antenna (the surface of the reconfigurable slot antenna based on the sickle structure has a gap, increasing the effective path of the current, and the current travels along the gap, which is conducive to the concentrated distribution of current, improving The current distribution on the upper surface and the lower surface is realized to achieve miniaturization).

[0027] With the fork-shaped feed structure, two diodes are loaded at the junction of the horizontal branch and the vertical branch of the fork-shaped feed structure, and the different combinations of the diodes are controlled, and the antenna can realize the reconfigurable pattern. At the same time, the antenna is realized by a fork-shaped feed and a symmetrical antenna structure.

[0028] In the present embodiment, the simulation software CST is used to simulate and analyze each state of the antenna, and finally the optimized parameters are: W = 40 mm, L = 30 mm, 1 1 = 6.7 mm, l ₂ = l mm, l ₃ = 9 mm, 1 ₄ = 4 mm °

[0029] The diode BAR50-02V is selected as the RF switch. The different combinations of diodes are shown in the table.

[] [Table 1]

[0030]

[0031] FIG. 3 shows a reflection coefficient curve simulated by each state of the antenna. When two diodes (such as diodes D3 and D4 in Figure 2) are turned on, that is, statel吋, the antenna operating frequency band is 4.64-5.36GHz; when D3 and D4 are broken, that is, state2 inch, the antenna working frequency band is 3.71-4.62. GHz.

[0032] FIGS. 4-1 to 4-2 show simulated radiation patterns of respective resonant frequencies of the antenna. It can be seen from the figure that the pattern of the E plane is basically an "8" shape, and the pattern of the H plane (the plane of the wave propagation direction and the magnetic field direction) changes as the state of the gate changes. That is, statel and state2吋, as shown in Figures 4-1 and 4-2, the H-plane pattern is basically omnidirectional, and the antenna achieves frequency reconfigurability in statel and state2 states.

[0033] It should be noted that the reconfigurable slot antenna based on the sickle structure in the present invention omits the wires connecting the external control devices, and the control device for controlling the first diode and the second diode. In this embodiment, the control device may be, but is not limited to, any other device capable of controlling the twisting and closing of the diode, such as an electronic switch or a microcontroller.

The above is only a preferred embodiment of the present invention, and is not intended to limit the scope of the invention, and the equivalent structure or equivalent process transformations made by the description of the invention and the contents of the drawings, or indirectly or indirectly The technical field is equally included in the scope of patent protection of the present invention.

Industrial applicability

[0035] The present invention adopts the above technical solution, and brings the technical effects as follows: The reconfigurable slot antenna based on the sickle structure of the present invention can change the antenna according to communication requirements while maintaining the polarization mode unchanged. The frequency and radiation pattern, reduce the spatial noise of wireless communication systems, avoid electronic interference, improve system security, increase channel capacity, and are widely used in many aspects such as automotive and aircraft radar and satellite communication networks.

Claims

Claim

A reconfigurable slot antenna based on a sickle-shaped structure, characterized in that the reconfigurable slot antenna based on the sickle structure of the present invention comprises a substrate, a metal plate attached to an upper surface of the substrate; Two left and right symmetric sickle-shaped slits are etched, and the two left and right symmetric sickle-shaped slits are disposed at an intermediate position in a horizontal direction of the metal plate, and each of the sickle-shaped slits includes an L-shaped groove and a horizontal horizontal groove. The long side of the L-shaped groove is horizontally disposed on the metal plate, and one end of the horizontal horizontal groove is connected to the end of the long side of the L-shaped groove, and the horizontal horizontal groove is located at the long side of the L-shaped groove. Above the end, a diode is disposed in the short side of the L-shaped groove, and the diode in the one sickle-shaped slit is connected to the diode in the other sickle-shaped slit.

The reconfigurable slot antenna based on a sickle structure according to claim 1, wherein the reconfigurable slot antenna based on a sickle structure is a rectangular parallelepiped structure, and the metal plate is a copper surface, the metal plate The thickness is 0.5 ounces.

The reshaping slot antenna based on a sickle structure according to claim 2, wherein the substrate is a dielectric substrate of FR4, the substrate having a thickness of 1.6 cm and a dielectric constant of preferably 4.4.

The ripper-shaped structure-based reconfigurable slot antenna according to claim 3, wherein the metal plates have a length of 40 mm, the metal plates have a width of 30 mm, and the sickle-shaped slit 110 The length of the horizontal horizontal groove is 6.7 mm, the length of the long side of the L-shaped groove is 9 mm, the length of the short side of the L-shaped groove is 4 mm, the width of the L-shaped groove, and the width of the horizontal lateral groove are both l mm. The distance between the sickle-shaped slits from the bottom side of the metal plate was 17 mm, and the distance from the side of the metal plate to the sickle-shaped slit was 1.5 mm.

The reaming slot antenna based on a sickle structure according to claim 4, wherein when the two diodes are both turned on, the working frequency band of the reconfigurable slot antenna based on the sickle structure is 4.64 Between 5.36 GHZ.

The reaming slot antenna based on a sickle structure according to claim 4, wherein said two diodes of the sickle-shaped slit are broken, said reconfigurable slit based on a sickle structure The working frequency of the antenna is 3.71-4.62 GHz. [Claim 7] The reamable slot antenna based on a sickle structure according to claim 5 or 6, wherein the direction of the E plane of the reconfigurable slot antenna based on the sickle structure is "8""The font shape, the H-plane pattern of the reconfigurable slot antenna based on the sickle structure is omnidirectional.