Dual-port multi-mode co-aperture space scanning antenna and array based on sspp structure

Abstract

The application provides a kind of double-port multi-mode common-caliber space scanning antenna and array based on SSPP structure in the field of communication technology, comprising: SMA joint, dielectric plate, symmetric SSPP metal transmission line, floor, tapered microstrip line and sectorial microstrip;The symmetric SSPP metal transmission line and the floor are arranged on the front surface of the dielectric plate, and the tapered microstrip line and the sectorial microstrip are arranged on the back surface of the dielectric plate;A circular slot and a slot line are formed on the floor, and the circular slot and the slot line are connected;The tapered microstrip line and the sectorial microstrip are connected.The application changes the phase difference between the two feeding ports to excite the antenna to work in multiple modes, so that the directional diagram realizes hemispherical scanning in three-dimensional space.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of communication technology, in particular to a dual-port multi-mode common-aperture space scanning antenna and array based on SSPP structure, and relates to a dual-port multi-mode common-aperture space scanning antenna based on SSPP structure. BACKGROUND

[0002] With the development of antenna technology, antenna electric scanning technology plays an increasingly important role. At present, phase scanning and frequency scanning are more commonly used. The working principle of frequency scanning antenna is to change the phase relationship or lobe pointing between antenna units with the working frequency, which has the defect that it is difficult to realize wide-angle scanning, the feed structure is complex, and the number of antenna array elements is large, which easily increases the loss of the center frequency point. The phase scanning antenna uses a phase shifter to control the phase of the antenna unit to realize beam scanning, and the antenna system is relatively complex, and the working mode of the antenna is limited, and the beam scanning angle is discontinuous.

[0003] Through prior art retrieval, it is found that Chinese invention patent No. CN110112573B discloses a low-profile dual-frequency two-dimensional wide-angle scanning common-aperture phased array antenna, which is used to overcome the problem that high and low frequency antennas cannot simultaneously realize two-dimensional large-angle scanning in the design of traditional common-aperture phased array antennas. The present application comprises a back feed structure, a middle layer dielectric layer, a second middle layer metal copper coating layer, an upper layer dielectric layer and an upper layer metal copper coating layer, and a first metalized via and a second metalized via, which are stacked from bottom to top. The first metalized via penetrates the second middle layer metal copper coating layer, the middle layer dielectric layer and the back feed structure to form a low-frequency antenna; the second metalized via corresponds to the first metalized via one by one, and the second metalized via penetrates the first metalized via and connects the upper layer dielectric layer and the upper layer metal copper coating layer to form a high-frequency antenna. However, the scanning angle in the required working bandwidth of the above-mentioned patent is-50°-50°. The structure is relatively complex, and can only scan in two-dimensional space, and the scanning range is limited. The phased scanning technology of the traditional antenna realizes beam scanning by controlling the phase difference between the antenna units, the antenna working mode is single, and the scanning angle range of the antenna array is limited. SUMMARY

[0004] In view of the defects in the prior art, the purpose of the present application is to provide a dual-port multi-mode common-aperture space scanning antenna and array based on SSPP structure.

[0005] According to the dual-port multi-mode common-aperture space scanning antenna based on SSPP structure provided by the present application, it comprises an SMA connector, a dielectric plate, a symmetric SSPP metal transmission line, a ground plate, a tapered microstrip line and a fan-shaped microstrip.

[0006] The symmetric SSPP metal transmission line and the ground plate are arranged on the front surface of the dielectric plate, the tapered microstrip line and the fan-shaped microstrip are arranged on the back surface of the dielectric plate;

[0007] The ground plate is provided with a circular gap and a slot line, and the circular gap and the slot line are connected.

[0008] The tapered microstrip line and the fan-shaped microstrip are connected.

[0009] In some embodiments, a decoupling metal branch is further included, the decoupling metal branch is arranged on the front surface of the dielectric plate, the decoupling metal branch is in the middle of the symmetric SSPP metal transmission line, and a gap branch is further arranged on the ground plate, and the gap branch is arranged perpendicularly to the slot line. The decoupling metal branch 6 can reduce the coupling between the two feed ports and adjust the impedance matching. The gap branch can improve the impedance matching and expand the impedance bandwidth.

[0010] In some embodiments, the number of SMA joints is two.

[0011] The number of circular gaps is two, the number of gap branches is six, and the number of slot lines is two, two slot lines are arranged in connection with two circular gaps, and three gap branches are arranged perpendicularly on one slot line.

[0012] The number of tapered microstrip lines is two, and the number of fan-shaped microstrips is two, two tapered microstrip lines are arranged in connection with two fan-shaped microstrips. The circular gap and the slot line are connected to form a broadband matching structure.

[0013] In some embodiments, the symmetric SSPP metal transmission line is in a symmetric sawtooth shape.

[0014] In some embodiments, the circular gap is connected to one end of the slot line, electromagnetic waves from the SMA joint are coupled into the symmetric SSPP metal transmission line, SSPP waves propagate along the symmetric SSPP metal transmission line and the decoupling metal branch, and the end tapered sawtooth structure radiates outward.

[0015] In some embodiments, the six symmetrically arranged gap branches are symmetrically placed on both sides of the symmetric SSPP metal transmission line.

[0016] In some embodiments, four triangular cut corners are symmetrically etched on the symmetric SSPP metal transmission line, the antenna side-shooting performance of the symmetric SSPP metal transmission line is greater than a set threshold, the end-shooting performance is improved, and the frequency band is widened.

[0017] In some embodiments, the phase difference between the two SMA joints ranges from -180° to 180°, the current direction on the symmetric SSPPs metal transmission line changes, the antenna works in different modes, and as the phase difference continuously changes, the working mode of the antenna also continuously changes, realizing beam spatial scanning.

[0018] In some embodiments, the phase difference between the two SMA joints is changed by a phase shifter. The phase difference between the two ports can be changed by connecting a phase shifter to each port.

[0019] The application also provides a dual-port multi-mode common-aperture spatial scanning antenna array based on an SSPP structure, comprising the dual-port multi-mode common-aperture spatial scanning antenna based on an SSPP structure.

[0020] The number of the dual-port multi-mode common-aperture spatial scanning antennas based on an SSPP structure is multiple.

[0021] The multiple dual-port multi-mode common-aperture spatial scanning antennas based on an SSPP structure are arranged in space, realizing higher gain and larger range of beam scanning.

[0022] Compared with the prior art, the application has the following beneficial effects:

[0023] 1. The application couples and feeds the symmetric SSPPs metal transmission line through SMA joints, and changes the phase difference between the two feeding ports to excite the antenna to work in multiple modes, so that the radiation pattern realizes hemispherical scanning in three-dimensional space.

[0024] 2. The application has good radiation pattern spatial scanning characteristics, and as the phase difference between the two feeding ports continuously changes, the antenna radiation beam direction also continuously changes, that is, the antenna works in different modes and can cover the hemispherical space. BRIEF DESCRIPTION OF DRAWINGS

[0025] Other features, objects and advantages of the application will become more apparent from the following detailed description of non-limiting embodiments, made with reference to the accompanying drawings:

[0026] Figure 1 It is a top view schematic diagram of the overall structure of the application;

[0027] Figure 2a It is a structural schematic diagram of the overall structure of the application;

[0028] Figure 2b It is a schematic diagram of the working principle of the application;

[0029] Figure 3a It is a schematic diagram of the passive S parameter of the application;

[0030] Figure 3b Active S parameter diagram of two-port phase difference -180° of the present application;

[0031] Figure 3c Active S parameter diagram of two-port phase difference -60° of the present application;

[0032] Figure 3d Active S parameter diagram of two-port phase difference 0° of the present application;

[0033] Figure 3e Active S parameter diagram of two-port phase difference 120° of the present application;

[0034] Figure 3f Active S parameter diagram of two-port phase difference 180° of the present application;

[0035] Figure 4a Two-dimensional radiation direction diagram when the first port is fed alone;

[0036] Figure 4b Two-dimensional radiation direction diagram when the second port is fed alone;

[0037] Figure 4c Two-dimensional radiation direction diagram when two feeding ports are fed simultaneously and the phase difference is -180° in turn;

[0038] Figure 4d Two-dimensional radiation direction diagram when two feeding ports are fed simultaneously and the phase difference is -150° in turn;

[0039] Figure 4e Two-dimensional radiation direction diagram when two feeding ports are fed simultaneously and the phase difference is 0° in turn;

[0040] Figure 4f Two-dimensional radiation direction diagram when two feeding ports are fed simultaneously and the phase difference is 30° in turn;

[0041] Figure 4g Two-dimensional radiation direction diagram when two feeding ports are fed simultaneously and the phase difference is 180° in turn;

[0042] Figure 5 Array structure diagram of the present application;

[0043] Figure 6a Two-dimensional direction diagram of the array in the embodiment of the present application when the two-port phase difference of the unit is 0°;

[0044] Figure 6b Two-dimensional direction diagram of the array in the embodiment of the present application when the two-port phase difference of the unit is 90°;

[0045] Figure 6c Figure 2 is a two-dimensional directional diagram of an array in an embodiment of the present application at a phase difference of 180° between two ports of a unit;

[0046] Reference signs:

[0047] DETAILED DESCRIPTION

[0048] The present application will be described in detail below with specific embodiments. The following examples will help those skilled in the art to further understand the present application, but do not limit the present application in any form. It should be noted that those skilled in the art can make several changes and improvements without departing from the concept of the present application. These are within the scope of protection of the present application.

[0049] Example 1:

[0050] As shown in Figure 1 , 2a , the present embodiment provides a dual-port multi-mode co-caliber space scanning antenna based on SSPPs structure, which comprises an SMA joint, a dielectric plate, a symmetric SSPP metal transmission line, a ground plate, a tapered microstrip line and a fan-shaped microstrip, and a decoupling metal branch. The symmetric SSPP metal transmission line and the ground plate are arranged on the front surface of the dielectric plate, and the tapered microstrip line and the fan-shaped microstrip are arranged on the back surface of the dielectric plate.

[0051] The ground plate is provided with a circular slot and a slot line, and the circular slot and the slot line are connected. The tapered microstrip line and the fan-shaped microstrip are connected. The decoupling metal branch is arranged on the front surface of the dielectric plate, and the decoupling metal branch is arranged in the middle of the symmetric SSPP metal transmission line. The ground plate is also provided with a slot branch, and the slot branch is arranged perpendicularly to the slot line. The decoupling metal branch 6 can reduce the coupling between the two feed ports and adjust the impedance matching. The slot branch can improve the impedance matching and expand the impedance bandwidth.

[0052] The number of SMA joints is two; the number of circular slots is two, the number of slot branches is six, the number of slot lines is two, two slot lines are connected with two circular slots, and three slot branches are arranged perpendicularly on one of the slot lines; the number of tapered microstrip lines is two, the number of fan-shaped microstrips is two, and two tapered microstrip lines are connected with two fan-shaped microstrips. The circular slot and the slot line are connected to form a broadband matching structure.

[0053] The symmetric SSPP metal transmission line is symmetrically serrated. The six symmetrically arranged slot branches are placed symmetrically on both sides of the symmetric SSPP metal transmission line. Four triangular corners are symmetrically etched on the symmetric SSPP metal transmission line. The antenna side shooting performance of the symmetric SSPP metal transmission line is greater than a set threshold, the end-fire performance is improved, and the frequency band is widened.

[0054] The electromagnetic wave from the SMA joint is coupled into the symmetric SSPP metal transmission line at one end of the circular slot connection groove line, the SSPPs wave propagates along the symmetric SSPP metal transmission line and the decoupling metal branch, and is radiated outward at the end tapered sawtooth structure.

[0055] The phase difference between the two SMA joints changes in the range of-180°-180°, the current direction on the symmetric SSPP metal transmission line changes, and the antenna works in different modes. With the continuous change of the phase difference, the working mode of the antenna also changes continuously, realizing the spatial scanning of the beam.

[0056] It also includes a phase shifter, and the phase difference between the two SMA joints is changed by the phase shifter. The phase difference between the two ports can be changed by connecting a phase shifter to each port.

[0057] As shown in the antenna working principle diagram shown in Figure 2b , by changing the phase difference between the two SMA joints 1 in the range of-180°-180°, the current direction on the symmetric SSPP metal transmission line changes, and the antenna works in different modes. With the continuous change of the phase difference, the working mode of the antenna also changes continuously, realizing the spatial scanning of the beam.

[0058] As shown in the passive S parameter diagram shown in Figure 3a , the 10dB impedance bandwidth of the antenna port 1 is 5.1-6.2GHz, and the relative bandwidth is 15.9%. The 10dB impedance bandwidth of the port 2 is 5.1-6.2GHz, and the relative bandwidth is 15.9%. The port isolation is greater than 13dB in the effective bandwidth.

[0059] As shown in the active S parameter diagram shown in Figures 3b to 3f , the phase difference between the two ports is-180°, -60°, 0°, 120°, and 180° in turn, and the return loss and isolation performance are good.

[0060] As shown in the two-dimensional radiation pattern shown in Figures 4a to 4g , when the port 1 and the port 2 work alone, the antenna shows a broadside mode. When the phase difference between the two ports is 0°, the antenna shows a broadside mode. When the phase difference between the two ports is 180°, the antenna shows an end-fire mode. With the phase difference increasing from-180° to 180° in turn, the main beam points in the hemispherical space from the broadside beam to the end-fire beam, realizing multi-mode spatial scanning.

[0061] Embodiment 2:

[0062] As shown in the two-dimensional radiation pattern shown in Figure 5The array structure diagram shows that the antenna units of embodiment 1 form a 1x4 array arranged along the z direction in Figure 1 The phase difference between the two ports of the antenna units can be adjusted to realize unit beam spatial scanning, and the phase difference between the antenna units is adjusted so that the main beam of the array is consistent with the main beam of the unit, thereby enhancing the beam gain and directivity.

[0063] The two-dimensional beam scanning diagram of the array as shown in Figures 6a to 6c The phase difference between the two ports of the antenna units is respectively set to 0°, 90° and 180°, and the phase difference between the antenna units is adjusted so that the array beam pointing direction is consistent with the unit beam pointing direction, thereby realizing beam spatial scanning.

[0064] In the description of the present application, it should be understood that the terms "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application.

[0065] The specific embodiments of the present application are described above. It should be understood that the present application is not limited to the specific embodiments described above, and those skilled in the art can make various changes or modifications within the scope of the claims, which does not affect the essential content of the present application. The embodiments of the present application and the features in the embodiments can be arbitrarily combined with each other without conflict.

Claims

1. A dual-port multi-mode co-bore-sight spatial scanning antenna based on SSPP structure, characterized in that, include: SMA connector (1), dielectric board (5), symmetrical SSPP metal transmission line (7), ground plane (8), gradient microstrip line (9) and fan-shaped microstrip (10); The symmetrical SSPP metal transmission line (7) and the ground plane (8) are disposed on the front side of the dielectric substrate (5), and the gradient microstrip line (9) and the fan-shaped microstrip (10) are disposed on the back side of the dielectric substrate (5). The floor (8) has a circular gap (2) and a groove (4) connected to each other. The gradient microstrip line (9) and the fan-shaped microstrip (10) are connected and arranged; It also includes: a decoupling metal stub (6), which is disposed on the front side of the dielectric substrate (5) and in the middle of the symmetrical SSPP metal transmission line (7). A slot stub (3) is also provided on the floor, which is perpendicular to the slot line (4). The circular slit (2) connects to one end of the groove line (4). Electromagnetic waves from the SMA connector (1) are coupled into the symmetrical SSPP metal transmission line (7). The SSPP wave propagates along the symmetrical SSPP metal transmission line (7) and the decoupling metal stub (6), and radiates outward at the end of the gradually serrated structure.

2. The dual-port multi-mode co-calored space scanning antenna based on SSPP structure according to claim 1, wherein, The number of SMA connectors (1) is two; The number of circular gaps (2) is two, the number of gap branches (3) is six, the number of grooves (4) is two, the two grooves (4) are respectively connected to the two circular gaps (2), and the three gap branches (3) are respectively vertically arranged on one of the grooves (4); The number of the gradient microstrip lines (9) is two, the number of the fan-shaped microstrips (10) is two, and the two gradient microstrip lines (9) are respectively connected to the two fan-shaped microstrips (10).

3. The dual-port multi-mode co-calored space scanning antenna based on SSPP structure according to claim 1, wherein, The symmetrical SSPP metal transmission line (7) is symmetrically sawtooth-shaped.

4. The dual-port multi-mode co-calored space scanning antenna based on SSPP structure according to claim 2, characterized in that, The six symmetrically arranged slit branches (3) are placed symmetrically on both sides of the symmetrical SSPP metal transmission line (7).

5. The dual-port multi-mode co-calored space scanning antenna based on SSPP structure according to claim 1, wherein, The symmetrical SSPP metal transmission line (7) has four triangular chamfers etched symmetrically in pairs, and the antenna side-firing performance of the symmetrical SSPP metal transmission line (7) is greater than a set threshold.

6. The dual-port multi-mode co-calored space scanning antenna based on SSPP structure according to claim 2, characterized in that, The phase difference between the two SMA connectors (1) varies from -180° to 180°.

7. The dual-port multi-mode co-calored space scanning antenna based on SSPP structure according to claim 6, characterized in that, Also includes: Phase shifter; The change in phase difference between the two SMA connectors (1) is achieved using a phase shifter.

8. A dual-port multi-mode co-bore-sight spatial scanning antenna array based on SSPP structure, characterized in that, include: The dual-port multimode common-aperture space scanning antenna based on the SSPP structure as described in any one of claims 1-7; The number of dual-port multimode common-aperture space scanning antennas based on the SSPP structure is multiple; Multiple dual-port multimode common-aperture spatial scanning antennas based on the SSPP structure are spatially arranged.

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