CN114050401A - Antenna device and radar - Google Patents
Antenna device and radar Download PDFInfo
- Publication number
- CN114050401A CN114050401A CN202111230579.7A CN202111230579A CN114050401A CN 114050401 A CN114050401 A CN 114050401A CN 202111230579 A CN202111230579 A CN 202111230579A CN 114050401 A CN114050401 A CN 114050401A
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- siw
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- substrate integrated
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- 230000005855 radiation Effects 0.000 claims abstract description 40
- 239000000758 substrate Substances 0.000 claims description 25
- 230000001939 inductive effect Effects 0.000 claims description 3
- 238000010586 diagram Methods 0.000 description 7
- 239000002184 metal Substances 0.000 description 3
- 238000000034 method Methods 0.000 description 2
- 238000004026 adhesive bonding Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000001465 metallisation Methods 0.000 description 1
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Classifications
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/36—Structural form of radiating elements, e.g. cone, spiral, umbrella; Particular materials used therewith
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/12—Supports; Mounting means
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/12—Supports; Mounting means
- H01Q1/22—Supports; Mounting means by structural association with other equipment or articles
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/50—Structural association of antennas with earthing switches, lead-in devices or lightning protectors
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q13/00—Waveguide horns or mouths; Slot antennas; Leaky-waveguide antennas; Equivalent structures causing radiation along the transmission path of a guided wave
- H01Q13/10—Resonant slot antennas
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q21/00—Antenna arrays or systems
Landscapes
- Variable-Direction Aerials And Aerial Arrays (AREA)
- Waveguide Aerials (AREA)
Abstract
The invention discloses an antenna device and a radar, wherein the antenna device comprises: a SIW slot antenna; the radiation enhancement part is positioned on two sides of the SIW slot antenna; the two radiation enhancement parts and the mouth surface of the SIW slot antenna form an opening angle which is adjustable; and the bracket is used for adjusting the opening angle between the two radiation enhancement parts and the mouth surface of the SIW slot antenna. Compared with the prior art, the radiation enhancement parts are arranged on the two sides of the SIW slot antenna, and the S11 of the antenna is improved at the central frequency of the operation after the radiation enhancement parts are added. The gain of the E-plane and the H-plane of the antenna is improved after the radiation enhancement part is added.
Description
Technical Field
The invention relates to the technical field of communication, in particular to an antenna.
Background
The waveguide slot antenna integrates the feed system and the radiation system, has small integral thickness, compact structure, light weight and low loss system, can be precisely processed by a numerical control machine, is easy to realize low-side lobe and even ultra-low side lobe performance, and is widely applied. The SIW technique is widely used in the millimeter wave band due to its outstanding dimensional characteristics. However, SIW slot array antennas and other dielectric substrate based antennas limit the maximum gain of these antennas due to dielectric loss at the millimeter wave frequency band.
Disclosure of Invention
The present invention provides an antenna device and a radar that improve gain, aiming at the above-mentioned deficiencies of the prior art.
An antenna device, comprising:
a SIW slot antenna;
the radiation enhancement part is positioned at two sides of the SIW slot antenna; the two radiation enhancement parts and the mouth surface of the SIW slot antenna form an opening angle which is adjustable.
The antenna device further comprises a support, and the support is used for adjusting the opening angle between the two radiation enhancement parts and the mouth surface of the SIW slot antenna.
The bracket comprises a first part, a second part and a third part; the first component has a first connection portion and a second connection portion; the second component has a first connection portion and a second connection portion; the third component has a first connection portion and a second connection portion; the first connecting part of the first component is rotationally connected with the first connecting part of the second component; the second connecting part of the first component is rotationally connected with the first connecting part of the third component; the second connecting part of the second component is in sliding connection with the second connecting part of the third component; the radiation enhancement portion is secured to the first member.
A fastener is arranged on the third component; the second component is provided with a sliding groove, and the fastening piece is arranged in the sliding groove and can fix the third component on the second component; the fastener can freely slide along the spout, and then drives the radiation enhancement part who is fixed in on the first part through the third part and changes the angle.
The fastener can be a classic fastening structure of a bolt and a gasket, and can also be a self-fastening screw.
Compared with the prior art, the invention has the beneficial effects that:
the radiation enhancement parts are arranged on two sides of the SIW slot antenna, and the S11 of the antenna is improved at the central frequency of the operation after the radiation enhancement parts are added. The gain of the E-plane and the H-plane of the antenna is improved after the radiation enhancement part is added.
Drawings
Fig. 1 is a schematic structural diagram of an antenna device according to the present invention.
FIG. 2 is a schematic diagram of an antenna unit;
fig. 3 is a schematic structural diagram of a linear array radiation unit;
fig. 4 is a dimension diagram of the SIW line array radiating element;
fig. 5 is a schematic structural diagram of an integrated waveguide power divider with one divided six substrates;
fig. 6 is a side view of the antenna device of the present invention;
FIG. 7 is a schematic structural view of a stent;
FIG. 8 is a side view of the bracket;
FIG. 9 is a bottom view of the bracket;
fig. 10 is a graph of S11 measured by the antenna of the present invention;
FIG. 11 is an E-plane and H-plane view of the antenna with the addition of a radiation enhancement section;
fig. 12 is an E-face comparison of an antenna array with and without added radiation enhancement;
fig. 13 is a diagram of the H-face ratio of the antenna array with and without radiation enhancement added.
Detailed Description
The invention is described in detail below with reference to the accompanying drawings:
an embodiment of the present invention provides an antenna apparatus, as shown in fig. 1, including:
SIW slot antenna 100;
SIW slot array antenna 100 and other dielectric substrate based antennas limit the maximum gain of these antennas due to dielectric loss at the millimeter wave frequency band. Therefore, the SIW slot array antenna 100 of the present application adds the radiation enhancement section 200 to improve the antenna gain.
The structure of the SIW slot antenna 100 is shown in fig. 2, and includes an upper metal structure 1, a dielectric substrate 2, and a lower metal structure 3. The antenna array structure comprises a SIW linear array radiating unit 5, a feed network 4(7 is a feed network back view) and a SIW-to-standard rectangular waveguide 6. The substrate integrated waveguide power divider of the feed network 4 has a structure that one path is divided into 2N paths, N is an integer greater than or equal to 3, and in this embodiment, N takes a value of 3. The antenna array has 6 linear array radiating elements along the + x direction, and the linear array radiating elements form an integral antenna array together. All round holes in the figure represent metallized through holes. The line radiating elements 5 take the form of Substrate Integrated Waveguide (SIW) slots, as shown in fig. 3.
Six SIW line array radiating elements 5 are provided, and the pitch of the longitudinal slot array is half the waveguide wavelength in order to keep all slots radiating with the same phase. The distance between the right short-circuit through hole of the SIW and the last slot is a quarter of the waveguide wavelength.
Fig. 4 is a dimension diagram of the SIW line radiation element, and s _ SIW, s, L, w, d _ v and s _ v in mm are respectively 2.05, 2.68, 1.50, 0.21, 1.62, 0.37 and 0.5.
The feed network 4 is composed of a six-path integrated waveguide power divider and a substrate integrated waveguide unequal-width equal-length phase shifter 13.
The structure of the six-path-divided substrate integrated waveguide power divider, as shown in fig. 5, is composed of three-level substrate integrated waveguide power dividers, including a first-level two-path-divided substrate integrated waveguide power divider 8 and second-level two-path-divided substrate integrated waveguide power dividers 10 and 12. The input signal is first split into two and the corner sensing metallized hole 9 is used to improve the reflection coefficient. Then enters a SIW one-to-two unequal power divider 10, an inductive metalized hole 11 is used for adjusting the power ratio and the phase difference of two paths, the middle four paths (15-18) feed in the same amplitude and phase according to the requirement of a feed network, the power of the two paths (14, 19) on the side is one third of that of the other four paths (15-18), and the phase of the feed is advanced by 70 degrees, because the output of the middle four paths always presents an axial symmetry structure, the output is in the same amplitude and phase. The adjustment of the power and the phase of the two paths of power feeds on the edge needs to be performed by using the SIW one-to-two unequal power divider 10 and the SIW equal-length unequal-width phase shifter 13. The phase shifter 13 here is equivalent to changing the waveguide wavelength of the substrate integrated waveguide so that the phases of the two paths (14, 19) on the edge can be changed, and different phase outputs can be obtained by adjusting the amount of via offset of the SIW phase shifter 13 metallization.
The first-stage two-path substrate integrated waveguide power divider 8 is connected to the input port of the substrate integrated waveguide, the second-stage two-path substrate integrated waveguide power divider is two (10, 12) and is connected to the two-path output ports of the first-stage two-path substrate integrated waveguide power divider, and finally the output ports 14-19 of the six-stage substrate integrated waveguide channels are kept at the same level.
The radiation enhancement features 20 are located on either side of the antenna array aperture plane, as shown in fig. 6. The radiation enhancement portion 20 may be embodied as a conductive metal plate. The two radiation enhancement parts 20 are symmetrically arranged on two sides of the caliber surface of the linear array radiation unit, and the longitudinal section of the radiation enhancement part forms a horn-shaped opening angle.
Because the field angle of the radiation enhancement part directly influences the gain of the antenna array, the adjustable support 300 is designed for the radiation enhancement part, so that the optimal field angle is adjusted in the actual measurement process to meet the requirement that the antenna gain is increased in the preset working frequency band.
The bracket 300 is structured as shown in fig. 7, and includes a first member 301 and a second member 302, and the first member 301 and the second member 302 are connected by a third member 303. One ends of the first member 301 and the second member 302 are rotatably connected by a rotating shaft. The radiation enhancement portion 200 is fixed to the first member 301 by means of gluing. The two ends of the third part 303 are respectively connected with the first part 301 and the sliding part 304 through rotating shafts. The slide member 304 is provided with a screw fastening screw 305 at the center. One end of the screw 305 extends into the slot 3021 in the middle of the second part 302 so that the screw can slide freely along the slot 3021, thereby bringing the radiation-enhancing part 200 fixed to the first part 301 to change its angle by the third part 303. The opening angle of the bracket can be fixed at a specific position by rotating the fastening screw. The rotary fastening screw may be a classic fastening structure of a bolt and a washer, or may be a self-fastening screw.
The radiation efficiency of the antenna is 78%. The measured S11 is shown in fig. 10. The S11 of the antenna after the addition of the radiation enhancement section is boosted at the operating center frequency and does not drop significantly at other operating bands, particularly the low frequency band.
The E-plane and H-plane gains of the antenna after adding the radiation enhancement section are about 16 dB, as shown in fig. 11.
With the addition of the radiation enhancement, the E-plane and H-plane beam widths of the antenna array are 22.6 ° and 3.8 °, respectively, see fig. 12 and 13.
The embodiment of the invention also provides a radar, which comprises but is not limited to a vehicle-mounted radar. The radar adopts the antenna device of the embodiment, and the antenna device meets the requirements of gain and beam width of a vehicle-mounted radar application scene.
Claims (10)
1. An antenna device, comprising:
a SIW slot antenna;
the radiation enhancement part is positioned at two sides of the SIW slot antenna; the two radiation enhancement parts and the mouth surface of the SIW slot antenna form an opening angle which is adjustable.
2. The antenna device according to claim 1, further comprising:
and the bracket is used for adjusting the opening angle between the two radiation enhancement parts and the mouth surface of the SIW slot antenna.
3. The antenna device according to claim 2, characterized in that the bracket comprises a first part, a second part and a third part; the first component has a first connection portion and a second connection portion; the second component has a first connection portion and a second connection portion; the third component has a first connection portion and a second connection portion; the first connecting part of the first component is rotationally connected with the first connecting part of the second component; the second connecting part of the first component is rotationally connected with the first connecting part of the third component; the second connecting part of the second component is in sliding connection with the second connecting part of the third component; the radiation enhancement portion is secured to the first member.
4. An antenna device according to claim 3, wherein a fastener is provided on the third member; the second component is provided with a sliding groove, and the fastening piece is arranged in the sliding groove and can fix the third component on the second component; the fastener can freely slide along the sliding groove, and then the third component drives the radiation enhancement part fixed on the first component to change the angle.
5. The antenna device according to any of claims 1-4, wherein the SIW slot antenna comprises a SIW linear array radiating element, a feed network and a rectangular waveguide; and the rectangular waveguide is connected with the SIW linear array radiating unit through a feed network.
6. The antenna device as claimed in claim 5, wherein the SIW line array radiating elements are plural, and the pitch of the longitudinal slot array is one half of the waveguide wavelength; the distance between the right short-circuit through hole of the SIW and the last slot is a quarter of the waveguide wavelength.
7. The antenna device according to claim 5, wherein the feed network is composed of a one-way six-way substrate integrated waveguide power divider and a substrate integrated waveguide unequal-width equal-length phase shifter.
8. The antenna device of claim 7, wherein the structure of the one-path six-path substrate integrated waveguide power divider is composed of a three-level substrate integrated waveguide power divider, which comprises a first-level one-path two-path substrate integrated waveguide power divider and a second-level one-path two-path substrate integrated waveguide power divider; the corners of the substrate integrated waveguide power divider with one path divided into two paths are provided with first inductive metalized holes for improving the reflection coefficient; and a second inductive metalized hole for adjusting the power ratio and the phase difference of the two paths is arranged in the substrate integrated waveguide power divider with one path divided into two paths at the first stage.
9. The antenna device according to claim 8, wherein the middle four equal-amplitude in-phase feeds, the power of the two side feeds is one third of that of the remaining four, and the phases of the two side feeds lead the middle four by 70 ° according to the requirements of the feed network.
10. A radar, characterised in that an antenna arrangement according to any one of claims 1-9 is used.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111230579.7A CN114050401A (en) | 2021-10-22 | 2021-10-22 | Antenna device and radar |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111230579.7A CN114050401A (en) | 2021-10-22 | 2021-10-22 | Antenna device and radar |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN114050401A true CN114050401A (en) | 2022-02-15 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111230579.7A Pending CN114050401A (en) | 2021-10-22 | 2021-10-22 | Antenna device and radar |
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| Country | Link |
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| CN (1) | CN114050401A (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20090066597A1 (en) * | 2007-09-07 | 2009-03-12 | Songnan Yang | Substrate Integrated Waveguide Antenna Array |
| CN204836050U (en) * | 2015-07-31 | 2015-12-02 | 中节能（临沂）太阳能科技有限公司 | Angularly adjustable solar cell panel mounting bracket |
| CN107069230A (en) * | 2017-01-16 | 2017-08-18 | 东南大学 | A kind of antenna structure and design method |
| US20170288313A1 (en) * | 2016-03-31 | 2017-10-05 | Cubtek Inc. | Dual slot siw antenna unit and array module thereof |
| CN108631054A (en) * | 2018-03-29 | 2018-10-09 | 西安电子工程研究所 | Mix the slot array antenna of feed |
| CN113410634A (en) * | 2021-06-20 | 2021-09-17 | 复旦大学 | Ultralow sidelobe high-gain metal waveguide slot antenna with surface modulation structure |
-
2021
- 2021-10-22 CN CN202111230579.7A patent/CN114050401A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20090066597A1 (en) * | 2007-09-07 | 2009-03-12 | Songnan Yang | Substrate Integrated Waveguide Antenna Array |
| CN204836050U (en) * | 2015-07-31 | 2015-12-02 | 中节能（临沂）太阳能科技有限公司 | Angularly adjustable solar cell panel mounting bracket |
| US20170288313A1 (en) * | 2016-03-31 | 2017-10-05 | Cubtek Inc. | Dual slot siw antenna unit and array module thereof |
| CN107069230A (en) * | 2017-01-16 | 2017-08-18 | 东南大学 | A kind of antenna structure and design method |
| CN108631054A (en) * | 2018-03-29 | 2018-10-09 | 西安电子工程研究所 | Mix the slot array antenna of feed |
| CN113410634A (en) * | 2021-06-20 | 2021-09-17 | 复旦大学 | Ultralow sidelobe high-gain metal waveguide slot antenna with surface modulation structure |
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