Antenna structure and antenna system

Abstract

The present application provides an antenna structure and an antenna system, wherein the antenna structure includes a dielectric substrate, a parallel double wire, a first dipole antenna, a second dipole antenna, and a reconstruction structure, wherein the dielectric substrate includes a relative front and back surface; the parallel double wire includes a parallel front conductor and a back conductor; the first dipole antenna includes a first radiation arm and a second radiation arm, and the second dipole antenna includes a third radiation arm and a fourth radiation arm; the reconstruction structure includes a front unit, a back unit, and a switch device; the two ends of the switch device are respectively connected to the front unit and the back unit; the parallel double wire is used to transmit radio frequency signals and control signals. The closing of the switch device is controlled by a control signal to introduce the impedance or phase value of the reconstruction structure into the antenna structure, thereby changing the shape of the directional pattern, realizing gain size switching and radiation beam pitch angle switching, and realizing reconstruction of the directional pattern of the antenna.

Description

Technical Field

[0001] The present application relates to the field of antennas, and in particular, to an antenna structure and an antenna system. Background Art

[0002] Antennas are an indispensable part of wireless communication systems. With the rapid development of information technology and wireless communication technology, antenna technology has also developed rapidly. In order to improve the communication quality of wireless communication systems and reduce the cost of wireless communication systems, multifunctionality, miniaturization, planarization and ultra-wide bandwidth have become the mainstream trends in antenna design. In order to achieve the multifunctionality of wireless communication antenna systems, reconfigurable antenna technology has become one of the key technologies of modern wireless communication antennas and a hot topic in the field of antenna theory and design. Polarization reconfigurable antennas are the focus of research because they can switch the polarization mode with the best communication quality in real time according to changes in the communication environment, reduce the loss caused by polarization mismatch to the wireless communication system, and improve communication quality.

[0003] Polarization reconfigurable antennas are proposed in the prior art. However, there is still no solution on how to achieve antenna pattern reconfiguration to adapt to complex communication environments.

[0004] The above information disclosed in the background technology section is only used to enhance the understanding of the background technology of the technology described in this article. Therefore, the background technology may contain certain information that does not form the prior art known in this country for those skilled in the art. Summary of the invention

[0005] The main purpose of the present application is to provide an antenna structure and an antenna system to solve the problem in the prior art that there is a lack of a method for reconstructing the antenna's directional pattern.

[0006] To achieve the above object, according to one aspect of the present application, an antenna structure is provided, the antenna structure comprising a dielectric substrate, parallel double wires, a first dipole antenna, a second dipole antenna and a reconstruction structure, wherein the dielectric substrate comprises a front side and a back side opposite to each other; the parallel double wires comprise a front conductor and a back conductor, the front conductor is located on the front side, and the back conductor is located on the back side; the first dipole antenna comprises a first radiating arm and a second radiating arm, the second dipole antenna comprises a third radiating arm and a fourth radiating arm, the first radiating arm and the third radiating arm are located on the front side, the second radiating arm and the fourth radiating arm are located on the back side, and the first radiating arm and the third radiating arm are respectively connected to the first radiating arm and the third radiating arm. The front conductor is connected, and the second radiation arm and the fourth radiation arm are respectively connected to the back conductor; the reconstruction structure includes a front unit, a back unit and a switching device, the front unit is located between the first radiation arm and the third radiation arm, and the first end of the front unit is connected to the front conductor; the back unit is located between the second radiation arm and the fourth radiation arm, and the first end of the back unit is connected to the back conductor; the first end of the switching device is electrically connected to the second end of the front unit, and the second end of the switching device is electrically connected to the second end of the back unit; wherein the parallel double wires are used to transmit radio frequency signals and control signals, and the control signal is a signal for controlling the switching state of the switching device.

[0007] Optionally, the antenna structure also includes a signal feeding point and a reference point, wherein the signal feeding point is located on the front side and on the same side of the first radiating arm and the third radiating arm, and the signal feeding point is connected to the front conductor; the reference point is located on the back side and on the same side of the second radiating arm and the fourth radiating arm, and the reference point is connected to the back conductor, and the signal feeding point and the reference point are respectively used to connect to the coaxial line to receive the radio frequency signal and the control signal through the coaxial line.

[0008] Optionally, the front unit is perpendicular to the front conductor, and the back unit is perpendicular to the back conductor.

[0009] Optionally, the lengths of the front conductor and the back conductor are respectively predetermined wavelengths, the predetermined wavelength being a wavelength corresponding to an operating frequency band of the antenna structure, the first end of the front unit is located in the middle of the front conductor, the first end of the back unit is located in the middle of the back conductor, and the length of the front unit and the length of the back unit are respectively one quarter of the predetermined wavelength.

[0010] Optionally, the first dipole antenna is an H-type dipole, and the second dipole antenna is an H-type dipole.

[0011] Optionally, the first radiation arm and the third radiation arm are respectively symmetrical about the front conductor axis, and the second radiation arm and the fourth radiation arm are respectively symmetrical about the back conductor axis.

[0012] Optionally, the switch device is a PIN diode, a varactor diode or a MEMS (Micro Electro Mechanical Systems) switch.

[0013] Optionally, when the switch device is turned on, the first dipole antenna and the second dipole antenna work simultaneously; when the switch device is turned off, the first dipole antenna or the second dipole antenna works.

[0014] According to another aspect of the present application, an antenna system is provided, comprising the antenna structure.

[0015] Optionally, the antenna structure includes a signal feeding point and a reference location, and the antenna system further includes a coaxial line, and the coaxial line is respectively connected to the signal feeding point and the reference location.

[0016] Applying the technical solution of the present application, the antenna structure includes a dielectric substrate, parallel double wires, a first dipole antenna, a second dipole antenna and a reconstruction structure, wherein the dielectric substrate includes a front side and a back side opposite to each other; the parallel double wires include a front conductor and a back conductor; the first dipole antenna includes a first radiating arm and a second radiating arm, and the second dipole antenna includes a third radiating arm and a fourth radiating arm; the reconstruction structure includes a front unit, a back unit and a switch device; the two ends of the switch device are respectively connected to the front unit and the back unit; the parallel double wires are used to transmit radio frequency signals and control signals. Compared with the problem of the lack of a method for reconstructing the antenna pattern in the prior art, the antenna structure of the present application controls the closing of the switch device through the control signal to introduce the impedance or phase value of the reconstruction structure into the antenna structure, thereby changing the shape of the pattern, realizing gain switching and radiation beam pitch angle switching, and realizing reconstruction of the antenna pattern. Moreover, in the present application, the RF signal and the control signal are both transmitted by the parallel dual-wire transmission, that is, the wireless performance of the same transmission structure and the reuse of the control signal are realized, which alleviates the influence of the control circuit on the antenna radiation. At the same time, compared with the existing transmission of control signals and RF signals in different ways, the present application simplifies the design and ensures that the manufacturing cost of the antenna structure is low. At the same time, since the switch device is loaded between the front unit and the back unit, rather than on the main radiation structure of the antenna, this also alleviates the influence of the insertion loss of the switch device on the antenna performance. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The drawings constituting part of the present application are used to provide a further understanding of the present application. The illustrative embodiments and descriptions of the present application are used to explain the present application and do not constitute an improper limitation on the present application. In the drawings:

[0018] Figure 1 A schematic diagram of an antenna structure according to an embodiment of the present application is shown;

[0019] Figure 2 A specific schematic diagram of an antenna structure according to an embodiment of the present application is shown;

[0020] Figure 3 A schematic diagram showing the elevation radiation direction of the antenna structure according to an embodiment of the present application is shown;

[0021] Figure 4 A schematic diagram showing the horizontal plane radiation direction of the antenna structure according to an embodiment of the present application is shown;

[0022] Figure 5 A schematic diagram showing the relationship between frequency and return loss according to an embodiment of the present application is shown.

[0023] The above drawings include the following reference numerals:

[0024] 10. Dielectric substrate; 20. Parallel double wires; 30. First dipole antenna; 40. Second dipole antenna; 50. Reconstruction structure; 60. Signal feeding point; 70. Reference location; 101. Front; 102. Back; 201. Front conductor; 202. Back conductor; 301. First radiation arm; 302. Second radiation arm; 401. Third radiation arm; 402. Fourth radiation arm; 501. Front unit; 502. Back unit; 503. Switch device. DETAILED DESCRIPTION

[0025] It should be noted that the following detailed descriptions are illustrative and are intended to provide further explanation of the present application. Unless otherwise specified, all technical and scientific terms used herein have the same meanings as those commonly understood by those skilled in the art to which the present application belongs.

[0026] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof.

[0027] It should be understood that when an element (such as a layer, film, region, or substrate) is described as being "on" another element, the element may be directly on the other element, or there may be intermediate elements. Moreover, in the specification and claims, when an element is described as being "connected" to another element, the element may be "directly connected" to the other element, or "connected" to the other element through a third element.

[0028] As introduced in the background technology, the prior art lacks a method for reconstructing the directional pattern of an antenna. In order to solve the above problem, the present application proposes an antenna structure and an antenna system.

[0029] According to a typical embodiment of the present application, an antenna structure is provided, such as Figure 1 As shown, the antenna structure includes a dielectric substrate 10, a parallel double line 20, a first dipole antenna 30, a second dipole antenna 40 and a reconstruction structure 50, wherein Figure 2 As shown, the dielectric substrate 10 includes a front side 101 and a back side 102 opposite to each other; the parallel double line 20 includes a front conductor 201 and a back conductor 202, the front conductor 201 is located on the front side 101, and the back conductor 202 is located on the back side 102; the first dipole antenna 30 includes a first radiation arm 301 and a second radiation arm 302, the second dipole antenna 40 includes a third radiation arm 401 and a fourth radiation arm 402, the first radiation arm 301 and the third radiation arm 401 are located on the front side 101, the second radiation arm 302 and the fourth radiation arm 402 are located on the back side 102, and the first radiation arm 301 and the third radiation arm 401 are connected to the front conductor 201, respectively, and the second radiation arm 302 and the fourth radiation arm 402 are connected to the front conductor 201, respectively. connected to the back conductor 202; the reconstruction structure 50 includes a front unit 501, a back unit 502 and a switch device 503, the front unit 501 is located between the first radiation arm 301 and the third radiation arm 401, and the first end of the front unit 501 is connected to the front conductor 201; the back unit 502 is located between the second radiation arm 302 and the fourth radiation arm 402, and the first end of the back unit 502 is connected to the back conductor 202; the first end of the switch device 503 is electrically connected to the second end of the front unit 501, and the second end of the switch device 503 is electrically connected to the second end of the back unit 502; wherein the parallel double line 20 is used to transmit radio frequency signals and control signals, and the control signal is a signal for controlling the switching state of the switch device.

[0030] The antenna structure includes a dielectric substrate, parallel double wires, a first dipole antenna, a second dipole antenna and a reconstruction structure, wherein the dielectric substrate includes a front side and a back side opposite to each other; the parallel double wires include a front conductor and a back conductor; the first dipole antenna includes a first radiation arm and a second radiation arm, and the second dipole antenna includes a third radiation arm and a fourth radiation arm; the reconstruction structure includes a front unit, a back unit and a switch device; the two ends of the switch device are respectively connected to the front unit and the back unit; the parallel double wires are used to transmit radio frequency signals and control signals. Compared with the problem of the lack of a method for reconstructing the antenna pattern in the prior art, the antenna structure of the present application controls the closure of the switch device through the control signal to introduce the impedance or phase value of the reconstruction structure into the antenna structure, thereby changing the shape of the pattern, realizing gain switching and radiation beam pitch angle switching, and realizing reconstruction of the antenna pattern. Moreover, in the present application, the above-mentioned radio frequency signal and the above-mentioned control signal are both transmitted by the above-mentioned parallel two-wire transmission, that is, the wireless performance of the same transmission structure and the reuse of the control signal are realized, and the influence of the control circuit on the antenna radiation is alleviated. At the same time, compared with the existing transmission of control signals and radio frequency signals in different ways, the present application simplifies the design and ensures that the manufacturing cost of the above-mentioned antenna structure is low. At the same time, since the above-mentioned switching device is loaded between the above-mentioned front unit and the above-mentioned back unit, rather than on the main radiation structure of the antenna, this also alleviates the influence of the switching device insertion loss on the antenna performance.

[0031] Specifically, the dielectric substrate includes PTFE (Poly Tetra Fluor ethylene) PCB (Printed Circuit Board), and of course, it can also be other plates. The second end of the first short section and the second end of the second short section are connected through a metallized via on the dielectric substrate, and the switch device is placed.

[0032] According to a specific embodiment of the present application, Figure 2As shown, the antenna structure further includes a signal feed point 60 and a reference point 70, wherein the signal feed point 60 is located on the front side 101 and on the same side of the first radiation arm 301 and the third radiation arm 401, and the signal feed point 60 is connected to the front conductor 201; the reference point 70 is located on the back side 102 and on the same side of the second radiation arm 302 and the fourth radiation arm 402, and the reference point 70 is connected to the back conductor 202, and the signal feed point 60 and the reference point 70 are respectively used to connect to the coaxial line to receive the RF signal and the control signal through the coaxial line. The signal feed point and the reference point receive the RF signal and the control signal through the coaxial line, so that while further ensuring the stable transmission of the RF signal, the switching state of the switch device is further controlled by the input of the electrical signal, thereby reconstructing the antenna pattern.

[0033] Specifically, the coaxial line includes an inner conductor and an outer conductor, the inner conductor of the coaxial line is connected to the signal feed point of the dielectric substrate, and the outer conductor of the coaxial line is connected to the reference point of the dielectric substrate. The signal feed point serves as the input point of the control signal and the radio frequency signal, and the reference point serves as the reference ground of the radio frequency signal and the low potential reference point of the control signal. The radio frequency signal is stably input, and the switching device is turned on and off by changing the input value of the control level, thereby changing the impedance or phase input of the reconstruction structure, thereby changing the antenna pattern.

[0034] In order to further ensure the good performance of the above antenna structure, according to another specific embodiment of the present application, as Figure 2 As shown, the front unit 501 is perpendicular to the front conductor 201, and the back unit 502 is perpendicular to the back conductor 202. Of course, in actual application, the front unit may not be perpendicular to the front conductor, and the back unit may not be perpendicular to the back conductor. In this case, other additional structures need to be provided to adjust the non-perpendicular state to the same performance as the vertical state.

[0035] According to another specific embodiment of the present application, the lengths of the front conductor and the back conductor are respectively predetermined wavelengths, the predetermined wavelength is a wavelength corresponding to the working frequency band of the antenna structure, the first end of the front unit is located in the middle of the front conductor, and the first end of the back unit is located in the middle of the back conductor, that is, the front unit and the back unit are respectively located at 1 / 2 of the predetermined wavelength, and the length of the front unit and the length of the back unit are respectively one quarter of the predetermined wavelength.

[0036] According to a specific embodiment of the present application, the first dipole antenna is an H-type dipole, and the second dipole antenna is an H-type dipole.

[0037] According to another specific embodiment of the present application, Figure 2 As shown, the first radiation arm 301 and the third radiation arm 401 are respectively symmetrical about the axis of the front conductor 201 , and the second radiation arm 302 and the fourth radiation arm 402 are respectively symmetrical about the axis of the back conductor 202 .

[0038] It should be noted that the positional relationship between the first radiation arm and the third radiation arm is not limited to the above-mentioned symmetry about the front conductor axis, and the positional relationship between the second radiation arm and the fourth radiation arm is not limited to the above-mentioned symmetry about the back conductor axis.

[0039] The switch device can be any suitable two-terminal switch in the prior art, such as a diode, etc. According to another specific embodiment of the present application, the switch device is a PIN diode, a varactor diode or a MEMS switch. When the switch device is a PIN diode, the reconstruction structure is used for impedance adjustment as a variable impedance loading section; when the switch device is a varactor diode, the reconstruction structure is used for impedance adjustment and phase shift as a phase shift section.

[0040] The PIN diode is a diode with a PIN structure formed by adding a thin layer of low-doped intrinsic semiconductor layer between P and N semiconductor materials.

[0041] In a specific embodiment, the first dipole antenna and the first dipole antenna require the parallel two-wire feeding, and the PIN diode / varicap diode requires the control signal to generate a potential difference. Through the design of the variable impedance loading section (for the PIN diode) or the phase shifting section (for the varactor diode), the front conductor and the back conductor as the transmission line can be used as the control signal input line of the PIN tube at the same time, and the RF coaxial line welded at the front end can simultaneously feed the RF signal and the control signal, so as to realize the multiplexing of the wireless performance and control signal of the same transmission structure, greatly reduce the influence of the control circuit on the antenna radiation, simplify the design and reduce the cost. At the same time, since the switch device is loaded on the impedance / phase introduction section instead of the main radiation structure of the antenna, the influence of the insertion loss of the switch device on the antenna performance is also reduced.

[0042] According to a specific embodiment of the present application, when the switch device is turned on, the first dipole antenna and the second dipole antenna work simultaneously, and when the switch device is turned off, the first dipole antenna or the second dipole antenna works.

[0043] In a specific embodiment, Figure 1 As shown, the signal feed point and the reference point are respectively located on the side of the first dipole antenna away from the second dipole antenna. When a PIN diode is used, when the input control level is high, the switch device is turned on, and the reconstructed structure is equivalent to a parallel 1 / 4 wavelength short-circuit line. For the loading position of the structure on the parallel double line, the input impedance is infinitely small, which plays a role in current balance. The first dipole antenna and the second dipole antenna work at the same time. When the input level is low, the switch device is disconnected, and the reconstructed structure is equivalent to a parallel 1 / 4 wavelength open line. For the loading position of the structure on the parallel double line, the input impedance is infinitely large, the signal is fully reflected at this place, and only the first dipole antenna works. When a varactor diode is used, when the input level is low, the switch device is disconnected, and the reconstructed structure is equivalent to a parallel 1 / 4 wavelength open line. For the loading position of the structure on the parallel double line, the input impedance is infinitely large, the signal is fully reflected at this place, and only the first dipole antenna works. When the input control level corresponds to the conduction of the strain capacitive diode and no capacitor is introduced, the above-mentioned switch device is turned on, no capacitor is loaded, and the above-mentioned reconstruction structure is equivalent to a parallel 1 / 4 wavelength short-circuit line. For the loading position of the structure on the above-mentioned parallel double line, the input impedance is infinitely small, which plays a role of current balance, and the above-mentioned first dipole antenna and the above-mentioned second dipole antenna work simultaneously; when the input control level corresponds to the conduction of the strain capacitive diode and a capacitor is introduced, the above-mentioned switch device is turned on, and there is a capacitor loaded, the current phase leads, and the above-mentioned reconstruction structure is equivalent to a parallel 1 / 4 wavelength open line, and also has a phase shifting effect. For the loading position of the structure on the above-mentioned parallel double line, the input impedance is infinitely small, the above-mentioned first dipole antenna and the above-mentioned second dipole antenna work simultaneously, and they are unequal phase fed.

[0044] like Figure 2 As shown, when the switch device is turned off, the reconstructed structure is in an open circuit state, the impedance introduced at this point is infinite, and when the signal reaches the parallel position of the reconstructed structure, total reflection occurs, and only the first dipole antenna works to achieve a low-gain wide-beam mode; as shown Figure 2 As shown, when a DC bias voltage is loaded on the inner core of the coaxial line, the switch is turned on, the reconstructed structure is in a short-circuit state, the impedance introduced at this point is infinitesimal, the stub has no effect on the original structure, and the first dipole antenna and the second dipole antenna work simultaneously to achieve a high-gain narrow beam mode.

[0045] Specifically, Figure 3 to Figure 4As shown, when the switch is turned on, the maximum gain direction is on the horizontal plane, at which point the maximum gain is about 5dBi, and the 3dB beam width is about 45°; when the switch is turned off, the antenna maximum gain direction is tilted downward by 45° (θ=about 135°), at which point the maximum gain is about 3dBi, and the 3dB beam width is about 80°. Figure 5 As shown, the return loss of the antenna in the 5.15-5.5 GHz frequency band is less than -10 dB when the switch device is turned on and off, and better matching and radiation efficiency can be obtained.

[0046] In a specific embodiment, the above-mentioned antenna structure can realize omnidirectional radiation in the azimuth plane. The home WIFI communication system can operate in the 2-7 GHz frequency band, omnidirectional radiation in the azimuth plane, adjustable beam inclination angle in the elevation plane, and adjustable antenna gain and beam width, which is suitable for home communication products.

[0047] According to another typical embodiment of the present application, an antenna system is provided, comprising the above-mentioned antenna structure.

[0048] The above-mentioned antenna system, including the above-mentioned antenna structure, compared with the problem of the lack of a method for reconstructing the antenna pattern in the prior art, the above-mentioned antenna system of the present application controls the closure of the above-mentioned switch device through the above-mentioned control signal to introduce the impedance or phase value of the above-mentioned reconstruction structure into the above-mentioned antenna structure, thereby changing the shape of the pattern, realizing the gain size switching and the radiation beam pitch angle switching, and realizing the reconstruction of the antenna pattern. Moreover, in the present application, the above-mentioned radio frequency signal and the above-mentioned control signal are both transmitted by the above-mentioned parallel two-wire transmission, that is, the wireless performance and control signal multiplexing of the same transmission structure are realized, which alleviates the influence of the control circuit on the antenna radiation. At the same time, compared with the existing transmission of control signals and radio frequency signals in different ways, the present application simplifies the design and ensures that the manufacturing cost of the above-mentioned antenna structure is low. At the same time, since the above-mentioned switch device is loaded between the above-mentioned front unit and the above-mentioned back unit, rather than on the main radiation structure of the antenna, this also alleviates the influence of the insertion loss of the switch device on the antenna performance.

[0049] In a specific embodiment, the antenna system has a size of 90 mm*12 mm*0.75 mm, which is small and suitable for miniaturized terminal communication products.

[0050] According to a specific embodiment of the present application, the antenna structure includes a signal feeding point and a reference point, the antenna system also includes a coaxial line, the coaxial line includes an inner conductor and an outer conductor, the inner conductor of the coaxial line is connected to the signal feeding point, and the outer conductor of the coaxial line is connected to the reference point.

[0051] In the above embodiments of the present invention, the description of each embodiment has its own emphasis. For parts that are not described in detail in a certain embodiment, reference can be made to the relevant descriptions of other embodiments.

[0052] From the above description, it can be seen that the above embodiments of the present application achieve the following technical effects:

[0053] 1) The antenna structure of the present application includes a dielectric substrate, parallel double wires, a first dipole antenna, a second dipole antenna and a reconstruction structure, wherein the dielectric substrate includes a relative front and back sides; the parallel double wires include parallel front conductors and back conductors; the first dipole antenna includes a first radiation arm and a second radiation arm, and the second dipole antenna includes a third radiation arm and a fourth radiation arm; the reconstruction structure includes a front unit, a back unit and a switch device; the two ends of the switch device are respectively connected to the front unit and the back unit; the parallel double wires are used to transmit radio frequency signals and control signals. Compared with the problem of the lack of a method for reconstructing the antenna pattern in the prior art, the antenna structure of the present application controls the closure of the switch device through the control signal to introduce the impedance or phase value of the reconstruction structure into the antenna structure, thereby changing the shape of the pattern, realizing gain switching and radiation beam pitch angle switching, and realizing reconstruction of the antenna pattern. Moreover, in the present application, the above-mentioned radio frequency signal and the above-mentioned control signal are both transmitted by the above-mentioned parallel two-wire transmission, that is, the wireless performance of the same transmission structure and the reuse of the control signal are realized, and the influence of the control circuit on the antenna radiation is alleviated. At the same time, compared with the existing transmission of control signals and radio frequency signals in different ways, the present application simplifies the design and ensures that the manufacturing cost of the above-mentioned antenna structure is low. At the same time, since the above-mentioned switching device is loaded between the above-mentioned front unit and the above-mentioned back unit, rather than on the main radiation structure of the antenna, this also alleviates the influence of the switching device insertion loss on the antenna performance.

[0054] 2) The antenna system of the present application includes the antenna structure. Compared with the problem of the lack of a method for reconstructing the antenna pattern in the prior art, the antenna system of the present application controls the closure of the switch device through the control signal to introduce the impedance or phase value of the reconstructed structure into the antenna structure, thereby changing the shape of the pattern, achieving gain switching and radiation beam pitch angle switching, and realizing the reconstruction of the antenna pattern. Moreover, in the present application, the RF signal and the control signal are both transmitted by the parallel two-wire transmission, that is, the wireless performance and control signal multiplexing of the same transmission structure are realized, which alleviates the influence of the control circuit on the antenna radiation. At the same time, compared with the existing transmission of control signals and RF signals in different ways, the present application simplifies the design and ensures that the manufacturing cost of the antenna structure is low. At the same time, since the switch device is loaded between the front unit and the back unit, rather than on the main radiation structure of the antenna, this also alleviates the influence of the insertion loss of the switch device on the antenna performance.

[0055] The above description is only the preferred embodiment of the present application and is not intended to limit the present application. For those skilled in the art, the present application may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. An antenna structure, characterized in that: include: A dielectric substrate, including a front side and a back side opposite to each other; A parallel double wire, comprising a front conductor and a back conductor, wherein the front conductor is located on the front side and the back conductor is located on the back side; A first dipole antenna and a second dipole antenna, wherein the first dipole antenna comprises a first radiating arm and a second radiating arm, and the second dipole antenna comprises a third radiating arm and a fourth radiating arm, wherein the first radiating arm and the third radiating arm are located on the front side, and the second radiating arm and the fourth radiating arm are located on the back side, and the first radiating arm and the third radiating arm are respectively connected to the front side conductor, and the second radiating arm and the fourth radiating arm are respectively connected to the back side conductor; A reconstruction structure, comprising a stub and a switch device, wherein the stub comprises a front unit located at the front side and a back unit located at the back side, wherein the front unit is located between the first radiation arm and the third radiation arm, and a first end of the front unit is connected to the front conductor; the back unit is located between the second radiation arm and the fourth radiation arm, and a first end of the back unit is connected to the back conductor; a first end of the switch device is electrically connected to a second end of the front unit, and a second end of the switch device is electrically connected to a second end of the back unit; The parallel double lines are used to transmit radio frequency signals and control signals, and the control signal is a signal for controlling the switching state of the switch device.

2. The antenna structure according to claim 1, characterized in that: The antenna structure further comprises: A signal feeding point, located on the front side and on the same side of the first radiation arm and the third radiation arm, the signal feeding point being connected to the front conductor; A reference location is located on the back side and on the same side of the second radiation arm and the fourth radiation arm, the reference location is connected to the back conductor, and the signal feeding point and the reference location are respectively used to connect to the coaxial line to receive the radio frequency signal and the control signal through the coaxial line.

3. The antenna structure according to claim 1, characterized in that: The front unit is perpendicular to the front conductor, and the back unit is perpendicular to the back conductor.

4. The antenna structure according to claim 3, characterized in that: The lengths of the front conductor and the back conductor are respectively predetermined wavelengths, and the predetermined wavelength is a wavelength corresponding to the working frequency band of the antenna structure. The first end of the front unit is located in the middle of the front conductor, and the first end of the back unit is located in the middle of the back conductor. The lengths of the front unit and the back unit are respectively one-quarter of the predetermined wavelength.

5. The antenna structure according to claim 1, characterized in that: The first dipole antenna is an H-type dipole, and the second dipole antenna is an H-type dipole.

6. The antenna structure according to claim 5, characterized in that: The first radiation arm and the third radiation arm are respectively symmetrical about the front conductor axis, and the second radiation arm and the fourth radiation arm are respectively symmetrical about the back conductor axis.

7. The antenna structure according to any one of claims 1 to 6, characterized in that: The switch device is a PIN diode, a varactor diode or a MEMS switch.

8. The antenna structure according to any one of claims 1 to 6, characterized in that: When the switch device is turned on, the first dipole antenna and the second dipole antenna work simultaneously, and when the switch device is turned off, the first dipole antenna or the second dipole antenna works.

9. An antenna system, characterized in that: include: The antenna structure according to any one of claims 1 to 8.

10. The antenna system according to claim 9, characterized in that The antenna structure includes a signal feeding point and a reference point, and the antenna system also includes: The coaxial line is connected to the signal feeding point and the reference point respectively.

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