CN213212372U - Substrate integrated waveguide slot feed microstrip array antenna - Google Patents
Substrate integrated waveguide slot feed microstrip array antenna Download PDFInfo
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- CN213212372U CN213212372U CN202022146248.2U CN202022146248U CN213212372U CN 213212372 U CN213212372 U CN 213212372U CN 202022146248 U CN202022146248 U CN 202022146248U CN 213212372 U CN213212372 U CN 213212372U
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Abstract
The utility model discloses a substrate integrated waveguide slot feed microstrip array antenna, which comprises an upper dielectric substrate and a lower dielectric substrate, wherein the upper dielectric substrate is positioned right above the left side of the lower dielectric substrate and is connected with the lower dielectric substrate; the upper surface of the upper medium substrate is printed with 4 multiplied by 12 circular radiation patches which are arranged periodically, and each circular radiation patch is provided with cross-shaped grooves with different lengths; the lower dielectric substrate is a substrate integrated waveguide slot array, good conductors are printed on the upper surface and the lower surface of the lower dielectric substrate, slots which are in one-to-one correspondence with the cross-shaped grooves are formed in the upper surface, and a plurality of metallized through holes and coaxial feed ports are formed in the middle of the lower dielectric substrate; in addition, the dielectric constants of the upper dielectric substrate and the lower dielectric substrate are different. The utility model discloses array antenna compact structure, reasonable in design has high feed performance, characteristics such as high gain and miniaturization, can be used to keeping away of many rotor unmanned aerial vehicle platform barrier millimeter wave radar.
Description
Technical Field
The utility model belongs to the technical field of the antenna, concretely relates to integrated waveguide gap feed microstrip array antenna of substrate can be used to keeping away of many rotor unmanned aerial vehicle platform and hinder millimeter wave radar.
Background
Along with the development of unmanned aerial vehicle technique, many rotor unmanned aerial vehicle have had more and more applications in social life. The complex working environment puts higher and higher requirements on the form and performance of the antenna carried by the multi-rotor unmanned aerial vehicle platform. The influence that receives wind is great when many rotor unmanned aerial vehicle platform during operation to it is limited to carry on the space, therefore the antenna needs characteristics such as compact structure, low section, light in weight, easy integration and high gain. Many rotor unmanned aerial vehicle keep away barrier radar antenna and guaranteed the safety of many rotor unmanned aerial vehicle during operation, further expanded the range of application of many rotor unmanned aerial vehicle platform. Therefore, the research on the communication and obstacle avoidance radar antenna of the multi-rotor unmanned aerial vehicle has important significance.
One problem that large-scale many rotor unmanned aerial vehicle faces when carrying out the task is that many rotor unmanned aerial vehicle's flight route often can be through complicated topography such as building, trees, electric wire etc. many rotor unmanned aerial vehicle are far away apart from ground control personnel or will be through the place that control personnel are difficult for reacing during the executive task, and whether safe because surpassing control personnel's stadia and can not accurately judge many rotor unmanned aerial vehicle flight under this condition, has caused a lot of potential safety hazards. Therefore, the obstacle in the process of flight is actively found, information is transmitted to the ground control station, and flight parameters are timely adjusted, so that the flight safety significance of the multi-rotor unmanned aerial vehicle is great. The existing obstacle avoidance technologies include ultrasonic obstacle avoidance, infrared obstacle avoidance and the like. Above keep away barrier technique and use many restrictions occasionally on many rotor unmanned aerial vehicle platform. Based on the contrast research discovery to current obstacle avoidance technology, the millimeter wave radar has small, easily integrated, resolution ratio is high, the interference killing feature is strong, the advantage that all-weather working ability is strong, can be fine compensate the supersound keep away the obstacle, infrared keep away the obstacle etc. keep away the not enough of obstacle technology, consequently the millimeter wave radar keeps away the obstacle technology and is fit for being applied to many rotor unmanned aerial vehicle and keeps away the obstacle.
For example, the document Design of 77 GHz Narrow beam Antenna for UAVs Obstacle availance Radar proposes a quasi-yagi Antenna array printed by microstrip as a millimeter wave Obstacle Avoidance Radar Antenna, and the document 3D-Sensing MIMO Radar for UAV Formation Flight and Obstacle availance proposes an Obstacle Avoidance Radar applied to an unmanned aerial vehicle, where the Antenna of the Radar adopts a conventional microstrip Antenna series feed array, but the prior art aims at the problem that the use of the microstrip series feed Antenna array for the millimeter wave Radar Antenna causes parasitic radiation and energy leakage on a transmission line, thereby affecting Antenna gain.
In view of the above, the present inventors have devised a substrate integrated waveguide slot-fed microstrip array antenna to solve the above technical problems.
SUMMERY OF THE UTILITY MODEL
In order to solve the above-mentioned problem that exists among the prior art, the utility model aims to provide a substrate integrated waveguide gap feed microstrip array antenna, it adopts substrate integrated waveguide gap array to reduce the energy loss on the feeder for circular microstrip paster feed, on this basis, design the array through the medium base plate that uses the difference of two-layer dielectric constant from top to bottom, suitably reduce feed gap interval on the basis of standing wave gap array and make antenna structure compacter when guaranteeing the radiation performance of antenna, match the gap and optimize microstrip connecting wire position through the loading and improve antenna gain.
The to-be-solved technical problem of the utility model is realized through following technical scheme: a substrate integrated waveguide slot feed microstrip array antenna comprises an upper dielectric substrate and a lower dielectric substrate, wherein the upper dielectric substrate is positioned right above the left side of the lower dielectric substrate and is connected with the lower dielectric substrate;
the upper surface of the upper medium substrate is printed with 4 multiplied by 12 circular radiation patches which are arranged periodically, and each circular radiation patch is provided with cross-shaped grooves with different lengths;
the lower dielectric substrate is a substrate integrated waveguide slot array, good conductors are printed on the upper surface and the lower surface of the lower dielectric substrate, slots which are in one-to-one correspondence with the cross-shaped slots are formed in the upper surface, the central perpendicular line of each slot is overlapped with the central perpendicular line of the circular radiation patch, the lower dielectric substrate is provided with a plurality of first metalized through holes and second metalized through holes to connect the upper surface with the lower surface, the first metalized through holes are respectively arranged on the periphery of the lower dielectric substrate at equal intervals, on two sides of the slot array and distributed in two rows in the right side of the lower dielectric substrate, and the second metalized through holes are arranged on the right side of the lower dielectric substrate and form a four-path power divider together with the two rows of first metalized through holes distributed in the right side of the lower dielectric substrate;
and a coaxial feed port is formed in the right side of the lower dielectric substrate and used for feeding.
Further, the dielectric constant of the upper dielectric substrate is larger than that of the lower dielectric substrate.
Further, the upper dielectric substrate is made of Arlon AD350A, the length of the Arlon AD350A is 80.5mm, the width of the Arlon AD350 mm is 24.8mm, and the thickness of the Arlon AD is 0.3 mm.
Further, the lower dielectric substrate is made of Rogors5880, 105.7mm in length, 24.8mm in width and 0.503mm in thickness.
Furthermore, the cross-shaped groove is composed of a long groove and a short groove, the short groove is perpendicular to the long groove and symmetrically arranged along the center of the long groove, the circular radiation patch is divided into two identical semicircular radiation patches through the long groove, the two semicircular radiation patches are connected through a narrow transmission line, and the narrow transmission line and the short groove are distributed on two sides of the circle center of the circular radiation patch.
Further, the radius r of the circular radiation patch is 3mm, the distance between the center of the narrow transmission line and the circle center of the circular radiation patch is 0.62mm, and the distance between the center of the narrow transmission line and the intersection center of the long groove and the short groove of the cross-shaped groove is 1.13 mm.
Further, each of the slits has a dimension ax ay, wherein 4.6mm ≦ ax ≦ 4.74mm, ay =0.2 mm;
the gap offset is y, y is more than or equal to 0.085mm and less than or equal to 0.32mm, the distance between the centers of two adjacent gaps is half wavelength, and the distance between the center of the last gap at the tail end of the waveguide and the center of the short-circuit wall of the waveguide is quarter wavelength.
Further, the diameter d of the first metalized through holes is 0.6mm, the distance Sx between adjacent first metalized through holes in the same row is 0.1mm, and the distance a between two rows of first metalized through holes is 5.4 mm.
Compared with the prior art, the beneficial effects of the utility model are that:
1. the utility model relates to a substrate integrated waveguide gap feed microstrip array antenna uses the integrated waveguide gap of substrate to carry out the coupling feed to the above-mentioned circular radiation paster, has characteristics such as low-loss, high quality factor, low section, compares the microstrip series feed antenna array technique that the millimeter wave radar used among the prior art, has reduced parasitic radiation and energy and has revealed.
2. The utility model relates to an integrated waveguide gap feed microstrip array antenna of substrate, owing to adopted the different medium base plate of upper and lower two-layer dielectric constant, and upper dielectric base plate dielectric constant is great, and the advantage that sets up like this can suitably reduce the interval in lower floor's feed gap, makes the antenna compacter when guaranteeing the radiating effect, more is fit for the limited many rotor unmanned aerial vehicle platform in space and carries on.
3. The utility model relates to an integrated waveguide gap feed microstrip array antenna of substrate, owing to the cross fluting at circular radiation paster, changed the current distribution on original circular paster, influenced the resonance of antenna, strengthened the matching of antenna, improved the gain of antenna.
Drawings
FIG. 1 is a schematic view of the overall structure of the present invention;
fig. 2 is a schematic structural view of the circular radiation patch of the present invention;
FIG. 3 is a schematic diagram of the structure of a partial substrate integrated waveguide slot according to the present invention;
fig. 4 is a schematic structural diagram of a one-to-four power divider of the present invention;
fig. 5 is a graph showing the simulation of the reflection coefficient according to the embodiment of the present invention;
fig. 6 is a normalized directional diagram at 24.1GHz according to an embodiment of the present invention;
fig. 7 is a normalized directional diagram at 24.7GHz according to an embodiment of the present invention;
fig. 8 is the normalized directional diagram of embodiment 1 of the present invention at 25.1 GHz;
FIG. 9 is a graph comparing gain with frequency for an embodiment of the present invention and a control group;
fig. 10 is a graph comparing the reflection coefficient of the control group with the frequency.
In the figure: 1. An upper dielectric substrate; 2. a lower dielectric substrate; 3. a coaxial feed port; 4. a first metallized via; 5. a second metallized via; 11. A circular radiation patch; 21. An upper surface; 22. a lower surface; 111. A cross-shaped groove; 112. a narrow transmission line; 211. a gap; 1111. a long groove; 1112. short grooves.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be described below with reference to specific embodiments shown in the accompanying drawings. It is to be understood that such description is merely illustrative and not restrictive of the scope of the invention. Moreover, in the following description, descriptions of well-known structures and techniques are omitted so as to not unnecessarily obscure the concepts of the present invention.
In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and to simplify the description, but 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 should not be construed as limiting the present invention.
Example 1: referring to fig. 1-2, a substrate integrated waveguide slot feed microstrip array antenna includes an upper dielectric substrate 1 and a lower dielectric substrate 2, where the upper dielectric substrate 1 is located right above the left side of the lower dielectric substrate 2 and connected to the lower dielectric substrate 2; the upper surface of the upper medium substrate 1 is printed with 4 × 12 circular radiation patches 11 which are periodically arranged, and each circular radiation patch 1 is provided with cross-shaped grooves 111 which are the same in length and different in length; the current distribution on the circular radiation patch 11 is changed by the mode of the cross-shaped groove, thereby achieving the purposes of reducing the reflection coefficient and improving the gain.
The cross-shaped slot 111 is composed of a long slot 1111 and a short slot 1112, the short slot 1112 is perpendicular to the long slot 1111 and symmetrically arranged along the center of the long slot, the circular radiation patch 11 is divided into two identical semicircular radiation patches by the long slot 1111, the two semicircular radiation patches are connected by a narrow transmission line 112, and the narrow transmission line 112 and the short slot 1112 are distributed on two sides of the center of the circular radiation patch 11.
In this embodiment, the lower dielectric substrate 2 is a substrate integrated waveguide slot array, good conductors are printed on both the upper surface 21 and the lower surface 22 of the lower dielectric substrate 2, slots 211 corresponding to the cross-shaped slots 111 one by one are formed in the upper surface 21, a central perpendicular line of each slot 211 coincides with a central perpendicular line of the circular radiation patch 11, as shown in fig. 1 and 4, a plurality of first metalized through holes 4 and second metalized through holes 5 are formed in a substrate (middle portion) of the lower dielectric substrate 2 to connect the upper surface 21 with the lower surface 22, the first metalized through holes 4 are respectively and equidistantly formed in the periphery of the substrate of the lower dielectric substrate 2, on both sides of the slot 211 array and in two rows distributed in the right side of the substrate of the lower dielectric substrate 2, the second metalized through holes 5 are formed in the right side of the lower dielectric substrate 2 and form a four-way power divider with the two rows of the first metalized through holes 4 distributed in the right side of the substrate of the, the second metallized through hole 5 is used for inhibiting reflection and improving the matching of the input port; coaxial feed port 3 has been seted up on 2 substrate right sides of lower dielectric substrate, the utility model discloses the antenna carries out the feed through coaxial feed port 3.
The utility model discloses the dielectric constant of the last dielectric substrate 1 who chooses for use is greater than dielectric constant of lower dielectric substrate 2, and the advantage is through using the different dielectric substrate of two-layer dielectric constant to design the array about, suitably reduces feed gap interval on the basis of standing wave gap array and makes antenna structure compacter when guaranteeing the radiation performance of antenna.
Specifically, the upper dielectric substrate 1 of the present embodiment is made of Arlon AD350A material, and has a size of m1 × n1 × h1, wherein m1=24.8mm, n1=80.5mm, and a thickness h1=0.3 mm; the lower dielectric substrate 2 is made of the material Rogors5880 and has dimensions m2 × n2 × h2, wherein m2=24.8mm, n2=105.7mm, and thickness h2=0.503 mm.
As shown in fig. 2, the radius r of the circular radiation patch 11 is 3mm, the distance between the center of the narrow transmission line 112 and the center of the circular radiation patch 11 is 0.62mm, the distance between the center of the narrow transmission line 112 and the intersection center of the long slot 1111 and the short slot 1112 of the cross-shaped slot 111 is 1.13mm, the size of the narrow transmission line 112 is lxxly, where Lx, =0.3mm, Ly =0.2mm, the size of the short slot 1112 is lxx Ly, where Lx =1.9mm, Ly =0.2mm, and the width of the long slot 111 is 0.3 mm.
As shown in fig. 3, 4 × 12 slits 211 arranged periodically, each slit 211 having a size ax × ay, wherein 4.6mm ≦ ax ≦ 4.74mm, ay =0.2 mm; the offset of the slits 211 is y, y is more than or equal to 0.085mm and less than or equal to 0.32mm, the distance between two adjacent slits 211 is half wavelength, and the distance between the last slit at the tail end of the waveguide and the short-circuit wall of the waveguide is quarter wavelength; the diameter d of the first metalized through holes 4 is 0.6mm, the distance Sx =0.1mm between adjacent first metalized through holes in the same row, and the inner width of the slot waveguide unit, i.e., the distance a between the two rows of first metalized through holes, is 5.4 mm.
Further in order to verify the utility model discloses the performance of embodiment 1 antenna, the following contrast experiment has been done:
example 2: the circular radiation patch 11 printed on the upper surface of the upper dielectric substrate 1 is not slotted (the other parameters are the same).
The following simulation experiment is combined to explain the effects of the utility model as follows:
simulation 1, using commercial simulation software HFSS _19.2 to perform simulation calculation on the reflection coefficient of embodiment 1 of the present invention, and the result is shown in fig. 5; as can be seen from fig. 5, the reflection coefficient amplitude of the antenna of embodiment 1 of the present invention is smaller than-40 dB near 24.7GHz, which indicates that there is better impedance matching in this frequency band.
Simulation 6, which utilizes commercial simulation software HFSS _19.2 to simulate and calculate the change curve of the reflection coefficient along with the frequency of the embodiment 2, and the result is shown in FIG. 10; as can be seen from fig. 10, it is necessary to form a cross-shaped slot on the circular radiation patch, and the cross-shaped slot reduces the reflection coefficient of the antenna, enhances matching, and improves the gain of the antenna.
The simulation results show that, compared with the prior art, the antenna of embodiment 1 of the present invention feeds through the substrate integrated waveguide gap, so as to reduce the energy loss and enhance the feeding performance of the antenna; secondly, the circular radiation patches are subjected to cross slotting, so that the matching degree is improved, and the gain of the antenna is enhanced; the size of the antenna is improved through the different dielectric constants of the upper dielectric substrate and the lower dielectric substrate, the structure of the antenna is more compact, and the defects of the prior art are overcome.
The foregoing is a more detailed description of the present invention, taken in conjunction with the specific preferred embodiments thereof, and it is not intended that the invention be limited to the specific embodiments shown and described. To the utility model belongs to the technical field of ordinary technical personnel, do not deviate from the utility model discloses under the prerequisite of design, can also make a plurality of simple deductions or replacement, all should regard as belonging to the utility model discloses a protection scope.
Claims (8)
1. A substrate integrated waveguide slot feed microstrip array antenna is characterized in that: the dielectric substrate comprises an upper dielectric substrate (1) and a lower dielectric substrate (2), wherein the upper dielectric substrate (1) is positioned right above the left side of the lower dielectric substrate (2) and is connected with the lower dielectric substrate (2);
the upper surface of the upper medium substrate (1) is printed with 4 x 12 circular radiation patches (11) which are arranged periodically, and each circular radiation patch (11) is provided with cross-shaped grooves (111) with different lengths;
the lower dielectric substrate (2) is a substrate integrated waveguide gap array, the upper surface (21) and the lower surface (22) of the lower dielectric substrate (2) are printed with good conductors, the upper surface (21) is provided with gaps (211) corresponding to the cross-shaped grooves (111) one to one, each gap (211) is coincident with the central perpendicular line of the circular radiation patch (11), the lower dielectric substrate (2) is provided with a plurality of first metalized through holes (4) and second metalized through holes (5) to connect the upper surface (21) and the lower surface (22), the first metalized through holes (4) are respectively arranged on the periphery of the lower dielectric substrate (2) in an equal distance, on the two sides of the gap (211) array and are distributed inside the right side of the lower dielectric substrate (2), and the second metalized through holes (5) are arranged on the right side of the lower dielectric substrate (2), and the two rows of first metallized through holes (4) distributed in the right inner part of the lower medium substrate (2) form a one-to-four power divider;
the coaxial feed port (3) is formed in the right side of the lower dielectric substrate (2), and the coaxial feed port (3) is used for feeding.
2. The substrate integrated waveguide slot feed microstrip array antenna of claim 1 wherein: the dielectric constant of the upper dielectric substrate (1) is larger than that of the lower dielectric substrate (2).
3. The substrate integrated waveguide slot feed microstrip array antenna of claim 1 wherein: the upper dielectric substrate (1) is made of Arlon AD350A, the length is 80.5mm, the width is 24.8mm, and the thickness is 0.3 mm.
4. The substrate integrated waveguide slot feed microstrip array antenna of claim 3 wherein: the lower dielectric substrate (2) is made of Rogors5880, 105.7mm in length, 24.8mm in width and 0.503mm in thickness.
5. The substrate integrated waveguide slot feed microstrip array antenna according to any of claims 1 or 4, wherein: the cross-shaped groove (111) is composed of a long groove (1111) and a short groove (1112), the short groove (1112) is perpendicular to the long groove (1111) and symmetrically arranged along the center of the long groove, the circular radiation patch (11) is divided into two identical semicircular radiation patches through the long groove (1111), the two semicircular radiation patches are connected through a narrow transmission line (112), and the narrow transmission line (112) and the short groove (1112) are distributed on two sides of the circle center of the circular radiation patch (11).
6. The substrate integrated waveguide slot feed microstrip array antenna of claim 5 wherein: the radius r of the circular radiation patch (11) is 3mm, the distance between the center of the narrow transmission line (112) and the circle center of the circular radiation patch (11) is 0.62mm, and the distance between the center of the narrow transmission line (112) and the intersection center of the long groove (1111) and the short groove (1112) of the cross-shaped groove (111) is 1.13 mm.
7. The substrate integrated waveguide slot feed microstrip array antenna of claim 6 wherein: the size of each gap (211) is ax x ay, wherein 4.6mm ≦ ax ≦ 4.74mm, ay =0.2 mm;
the offset of the slits (211) is y, y is more than or equal to 0.085mm and less than or equal to 0.32mm, the distance between the centers of two adjacent slits (211) is half wavelength, and the distance from the center of the last slit (211) at the tail end of the waveguide to the center of the short-circuit wall of the waveguide is quarter wavelength.
8. The substrate integrated waveguide slot feed microstrip array antenna of claim 7 wherein: the diameter d of the first metalized through holes (4) is 0.6mm, the distance Sx between adjacent first metalized through holes (4) in the same row is 0.1mm, and the distance a between the two rows of first metalized through holes (4) is 5.4 mm.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202022146248.2U CN213212372U (en) | 2020-09-27 | 2020-09-27 | Substrate integrated waveguide slot feed microstrip array antenna |
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| CN202022146248.2U CN213212372U (en) | 2020-09-27 | 2020-09-27 | Substrate integrated waveguide slot feed microstrip array antenna |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112310628A (en) * | 2020-09-27 | 2021-02-02 | 三万星空(西安)信息技术有限公司 | Substrate integrated waveguide slot feed microstrip array antenna |
| CN113991309A (en) * | 2021-11-22 | 2022-01-28 | 四川大学 | Substrate integrated waveguide traveling wave antenna |
-
2020
- 2020-09-27 CN CN202022146248.2U patent/CN213212372U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112310628A (en) * | 2020-09-27 | 2021-02-02 | 三万星空(西安)信息技术有限公司 | Substrate integrated waveguide slot feed microstrip array antenna |
| CN113991309A (en) * | 2021-11-22 | 2022-01-28 | 四川大学 | Substrate integrated waveguide traveling wave antenna |
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