CN116598761A - Tapered beam antenna based on Fabry-Perot resonant cavity - Google Patents
Tapered beam antenna based on Fabry-Perot resonant cavity Download PDFInfo
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- CN116598761A CN116598761A CN202310470168.8A CN202310470168A CN116598761A CN 116598761 A CN116598761 A CN 116598761A CN 202310470168 A CN202310470168 A CN 202310470168A CN 116598761 A CN116598761 A CN 116598761A
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- 239000002184 metal Substances 0.000 claims abstract description 98
- 239000000758 substrate Substances 0.000 claims abstract description 71
- 230000002093 peripheral effect Effects 0.000 abstract description 3
- 238000010586 diagram Methods 0.000 description 6
- 238000004891 communication Methods 0.000 description 2
- 238000010295 mobile communication Methods 0.000 description 2
- 230000005855 radiation Effects 0.000 description 2
- 241001522301 Apogonichthyoides nigripinnis Species 0.000 description 1
- 239000004809 Teflon Substances 0.000 description 1
- 229920006362 Teflon® Polymers 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 244000309464 bull Species 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000000523 sample Substances 0.000 description 1
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
- H01Q1/38—Structural form of radiating elements, e.g. cone, spiral, umbrella; Particular materials used therewith formed by a conductive layer on an insulating support
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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
-
- 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
- H01Q13/02—Waveguide horns
-
- 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
- H01Q15/00—Devices for reflection, refraction, diffraction or polarisation of waves radiated from an antenna, e.g. quasi-optical devices
- H01Q15/0006—Devices acting selectively as reflecting surface, as diffracting or as refracting device, e.g. frequency filtering or angular spatial filtering devices
- H01Q15/0013—Devices acting selectively as reflecting surface, as diffracting or as refracting device, e.g. frequency filtering or angular spatial filtering devices said selective devices working as frequency-selective reflecting surfaces, e.g. FSS, dichroic plates, surfaces being partly transmissive and reflective
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
- Y02D30/00—Reducing energy consumption in communication networks
- Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks
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Abstract
The invention discloses a cone-shaped beam antenna based on a Fabry-Perot resonant cavity, which comprises a first dielectric substrate, a second dielectric substrate, a first metal layer, a second metal layer and a single-port feed source, wherein a first metal printed circuit is printed on one surface of the first dielectric substrate facing the second dielectric substrate, a second metal printed circuit is printed on one surface of the second dielectric substrate facing the first dielectric substrate, an FP cavity is formed among the first metal printed circuit, the second metal printed circuit and the first metal layer, the second metal layer is arranged on one surface of the second dielectric substrate far away from the second metal printed circuit, partial metal is cut between the second metal layer and the second dielectric substrate to form a metal E-shaped cavity, and the single-port feed source is arranged at the bottom center of the second dielectric substrate and penetrates through the metal E-shaped cavity and the second metal layer. The invention adopts a peripheral feed mode, realizes higher gain, has simple structure and is convenient to realize.
Description
Technical Field
The invention relates to the technical field of antennas, in particular to a Fabry-Perot (FP) -based high-gain cone beam antenna.
Technical Field
A cone beam antenna is a special antenna with a pattern different from the normal pattern. The direction of maximum gain of the pattern is not on the normal line of the antenna, but has a certain angle with the normal line of the antenna, and is axially symmetrical around the normal line, and presents a circular ring shape, so that the pattern has the characteristic of axial symmetry. In engineering systems such as radio communication, electronic countermeasure, radar, television, remote sensing, navigation, broadcasting, radio astronomy, etc., antennas are required to transmit or receive electromagnetic waves. For different application scenes, corresponding antennas are needed to better exert the device performance. The cone beam antenna is used as an important antenna, the maximum radiation direction of the directional diagram of the cone beam antenna forms a certain included angle with the zenith direction, and 360-degree coverage can be realized on the azimuth plane, so that the cone beam antenna has important application value in systems such as vehicle-mounted communication, unmanned aerial vehicle remote control, missile-borne fuze, large airspace detection and the like. In mobile communications, it is required to use cone beams with different frequencies corresponding to different inclinations.
In order to realize high-gain cone beams, the cone beam antenna of the present technology selects a spiral antenna and a slot array antenna engraved on a three-dimensional object, but has the defects of heavy weight, difficult installation of a common spiral antenna, low gain of a patch antenna and complex array antenna array.
Disclosure of Invention
The invention aims to provide a cone beam antenna based on a Fabry-Perot resonant cavity.
The technical scheme for realizing the purpose of the invention is as follows: the utility model provides a cone beam antenna based on Fabry-Perot resonant cavity, includes first dielectric substrate, second dielectric substrate, first metal layer, second metal layer and single port feed, first dielectric substrate and the parallel arrangement of second dielectric substrate, first dielectric substrate is printed with first metal printed circuit towards the one side of second dielectric substrate, second dielectric substrate is printed with second metal printed circuit towards the one side of first dielectric substrate, first metal layer sets up between first dielectric substrate not printed first metal printed circuit part and second dielectric substrate not printed second metal printed circuit, form the FP chamber between first metal printed circuit, second metal printed circuit and the first metal layer, the second metal layer sets up the one side that keeps away from second metal printed circuit at the second dielectric substrate, and dissects partial metal between second metal layer and the second dielectric substrate and form metal E shape cavity, single port feed sets up at second dielectric substrate bottom center, and passes metal E shape cavity and second metal layer.
Preferably, the single-port feed source comprises a horn radial waveguide and an SMA connector, wherein the horn radial waveguide is arranged at the center of the metal E-shaped cavity, and the SMA connector is arranged on the second metal layer and is connected with the horn radial waveguide.
Preferably, the first metal printed circuit comprises 8 circles of metal circular ring bull's eye patterns, and the arrangement rule of the patterns is as follows: the center is provided with a circle, n circles of circles are added along the radial direction by taking the length of P as a period, the width of each circle is W, and the outer circle radius of the nth circle from the center to the outside satisfies the formula: r=w+n×p, n being an integer.
Preferably, the second dielectric substrate comprises a disc and a ring, the ring is arranged around the disc, and the disc is connected with the ring through 30 branches arranged at equal intervals.
Preferably, the second metal printed circuit is printed on a disc of the second dielectric substrate, covering the entire circle.
Preferably, every 120 degrees of the 30 knots is provided with a knot with a width 3 times the width of the rest knots.
Preferably, the cavity edge of the FP cavity is inclined towards the second dielectric substrate.
Preferably, the cavity edge of the metal E-shaped cavity is inclined towards the second dielectric substrate.
Compared with the prior art, the invention has the remarkable advantages that:
the invention utilizes the Fabry-Perot cavity antenna to construct the low-profile high-gain cone-shaped wave beam antenna with simple structure. The structure is relatively simple, and the production and processing cost is lower;
the invention adopts the structural design of the metal E-shaped cavity in the radial line slot antenna, a double-layer structure of radial line waveguide is formed by the second medium substrate at intervals, the center of the metal E-shaped cavity is fed by the horn radial waveguide and the SMA joint, a radial outward TEM mode is generated, the metal E-shaped cavity is converted into a radial inward traveling wave mode in the FP cavity, and part of energy is radiated from the first medium substrate, so that the process of feeding from the peripheral edge to the center is realized.
The invention selects the annular bullseye structure frequency selection surface printed on the dielectric plate, can effectively improve the directivity and gain of cone-shaped wave beams, and can further improve the angle direction of a directional diagram by changing the period and the ring width of the ring.
The invention is described in further detail below with reference to the drawings and the detailed description.
Drawings
Fig. 1 is a front view of a cone-beam antenna based on a Fabry-Perot resonator of the present invention.
Fig. 2 is a top view of a Fabry-Perot resonator based cone beam antenna of the present invention.
FIG. 3 is a schematic illustration of the dimensions of the first dielectric substrate of FIG. 1 according to the present invention.
FIG. 4 is a schematic illustration of the dimensions of the second dielectric substrate of FIG. 1 according to the present invention.
Fig. 5 is a schematic diagram of the FP cavity and metal E-shaped cavity dimensions of fig. 1 in accordance with the present invention.
FIG. 6 is a cross-sectional view of the horn radial waveguide and SMA joint of FIG. 1 according to the present invention.
Fig. 7 is an E-plane and H-plane pattern at 12.5GHz for an embodiment of the invention.
Fig. 8 is a plot of cone beam antenna return loss versus frequency in accordance with an embodiment of the present invention.
Detailed Description
As shown in fig. 1, the tapered beam antenna based on the Fabry-Perot resonant cavity includes a first dielectric substrate 6, a second dielectric substrate 8, a first metal layer, a second metal layer and a single-port feed source 2, where the first dielectric substrate 6 and the second dielectric substrate 8 are arranged in parallel, a first metal printed circuit 7 is printed on a surface of the first dielectric substrate 6 facing the second dielectric substrate 8, a second metal printed circuit 9 is printed on a surface of the second dielectric substrate 8 facing the first dielectric substrate 6, the first metal layer is disposed between a portion of the first dielectric substrate 6 where the first metal printed circuit is not printed and the second metal printed circuit 9 where the second metal printed circuit 8 is not printed, the first metal printed circuit 7, the second metal printed circuit 9 and the first metal layer form an FP cavity 1, the second metal layer is disposed on a surface of the second dielectric substrate 8 far from the second metal printed circuit 9, a portion of the split metal is formed between the second metal layer and the second dielectric substrate 8, and the single-port feed source 8 is disposed at a bottom of the second dielectric substrate 8, and the FP cavity 3 is formed by passing through the second metal printed circuit 8. The single-port feed source 2 feeds power from the center to the periphery. The emitted electromagnetic wave is reflected twice through the metal E-shaped cavity 3 and the FP cavity 1 to form a wave beam forming network, and finally cone-shaped wave beams are formed.
Specifically, the first dielectric substrate 6 is Rogers RO4350, and the dielectric constant thereof is 3.66.
Specifically, the second dielectric substrate 8 is Rogers RO4003, and the dielectric constant thereof is 3.55.
In a further embodiment, the single-port feed 2 includes a horn radial waveguide 4 and an SMA connector 5, where the horn radial waveguide 4 is disposed at the center of the metal E-shaped cavity 3, and the SMA connector 5 is disposed on the second metal layer and connected to the horn radial waveguide 4. The single-port feed source 2 radiates electromagnetic waves in the horizontal direction outwards through the horn radial waveguide 4, and the electromagnetic waves reach the FP cavity 1 under the action of twice reflection of the metal E-shaped cavity 3.
In a further embodiment, the first metal printed circuit 7 includes 8 circles of metal circular-ring bulls-eye patterns, and the arrangement rule of the patterns is as follows: the center is provided with a circle, n circles of circles are added along the radial direction by taking the length of P as a period, the width of each circle is W, and the outer circle radius of the nth circle from the center to the outside satisfies the formula: r=w+n×p, n being an integer. By changing the period and the ring width of the ring, the angular orientation of the pattern can be improved.
In a further embodiment, the second dielectric substrate 8 includes a disc 16 and a ring 12, the ring 12 is disposed around the disc 16, and the disc 16 is connected to the ring 12 by 30 branches 13 disposed at equal intervals. The finer the 30 equally spaced knots 13, the more radiation passes, the better the directivity and transmission properties.
In a further embodiment, the second metal printed circuit 9 is printed on the disc 21 of the second dielectric substrate 8, covering the whole circle.
In a further embodiment, every 120 degrees of the 30 knots 13 is provided with a knot 14 having a width 3 times the width of the remaining knots 15. From the stability of the invention, the branches with different widths are arranged, so that the possibility of insufficient supporting force in application is prevented.
In a further embodiment, the cavity edge of the FP cavity 1 is inclined towards the second dielectric substrate, so as to form a beam radiating towards the center of the FP cavity 1.
In a further embodiment, the cavity edge of the metal E-shaped cavity 3 is inclined towards the direction of the second dielectric substrate, so as to form a beam radiating towards the edge of the FP cavity 1.
The invention provides a frequency selective surface of an annular bullseye structure printed on a dielectric plate, which can effectively improve the directivity and gain of cone beams by utilizing the structure of an FP cavity, and can further improve the angle direction of a directional diagram by changing the period and the ring width of a ring. The invention adopts the structural design of the metal E-shaped cavity in the radial line slot antenna, and realizes a novel feeding mode of feeding from the peripheral edge to the center. The invention has higher application value in mobile communication.
Examples
Referring to fig. 3, a schematic size diagram of a first dielectric substrate 6 is shown, wherein the radius of the first dielectric substrate 6 is R F =106 mm, the first metal printed circuit 7 has a radius R s N circles of circles are added along the radial direction with the length of p=13.35 mm as a period, and the width of each circle is w=11.65 mm. Referring to fig. 1, t=0.1 mm is the thickness of the first dielectric substrate 6.
Referring to fig. 4, a schematic size diagram of the second dielectric substrate 8 is shown, wherein the radius of the second dielectric substrate 8 is R p Second metal printed circuit of =120 mmThe radius of the road 9 is R s =100 mm; 30 knots 13 connecting the disc 16 and the ring 12 have a length W s =5.8 mm, wherein every 120 degrees one of the branches 14 is provided with a width L which is 3 times the width of the remaining branches 15 s =1.1 mm, the remaining knots 15 have a width L p =0.36 mm, see fig. 5, the second dielectric substrate 8 has a thickness h=0.5 mm.
Referring to FIG. 5, the size of the FP (Fabry-Perot) cavity 1 and the size of the metal E-shaped cavity 3 are schematically shown, and the diameter of the connecting surface of the FP cavity 1 and the first dielectric substrate 6 is D s ＝2*R s =200 mm, fp cavity 1 height is h1=14.5 mm; the height of the second metal layer is h2=10mm, the height of the metal E-shaped cavity 3 is hh=6mm, the length of the fp cavity 1 and the metal E-shaped cavity 3 from the edge is W the same as the length of 30 branches 13 of the second dielectric plate substrate 8 s ＝5.8mm。
Referring to FIG. 6, the horn radial waveguide 6 and SMA joint 5 are shown in cross section, the horn cross section being trapezoidal with the length of the upper base 17 of the trapezoid being D a =5.4 mm, lower bottom 18 length D r =0.8 mm, height hh=6 mm; the diameter of the probe in the SMA joint 5 is D r =0.8 mm, teflon layer (19) diameter D t ＝4mm。
Referring to fig. 7, using HFSS simulation software, at 12.5GHz, the highest gain of the antenna can reach 14.3dB, and a cone beam with a directional angle of 30 degrees is formed, and the two patterns are consistent.
Referring to fig. 8, using HFSS simulation software, the reflection coefficient is-19.7 dB at the center frequency of 12.5GHz, and the bandwidth is between 12.42GHz and 12.69GHz, which is about 2.2%, based on the graph of the return loss versus frequency of the Fabry-Perot resonator cone beam antenna.
Claims (8)
1. The cone beam antenna based on the Fabry-Perot resonant cavity is characterized by comprising a first dielectric substrate (6), a second dielectric substrate (8), a first metal layer, a second metal layer and a single-port feed source (2), wherein the first dielectric substrate (6) and the second dielectric substrate (8) are arranged in parallel, a first metal printed circuit (7) is printed on one surface of the first dielectric substrate (6) facing the second dielectric substrate (8), a second metal printed circuit (9) is printed on one surface of the second dielectric substrate (8) facing the first dielectric substrate (6), the first metal layer is arranged between a part of the first dielectric substrate (6) which is not printed with the second metal printed circuit (9) and the second dielectric substrate (8), an FP cavity (1) is formed among the first metal printed circuit (7), the second metal printed circuit (9) and the first metal layer, the second metal layer is arranged on one surface of the second dielectric substrate (8) which is far away from the second metal printed circuit (9), the second metal layer is arranged between the second metal printed circuit (8) and the second feed source (8), a part of the second metal layer (8) is formed between the second metal printed circuit (8) and the second metal printed circuit (8), and the second metal layer (3) is formed in a shape of a cross-section, and the second metal cavity (3) is formed between the second metal layer and the second metal printed circuit (8).
2. The Fabry-Perot resonator based cone beam antenna according to claim 1, characterized in that the single port feed (2) comprises a horn radial waveguide (4) and an SMA joint (5), the horn radial waveguide (4) being arranged in the centre of the metal E-shaped cavity (3), the SMA joint (5) being arranged in the second metal layer and being connected to the horn radial waveguide (4).
3. The tapered beam antenna based on Fabry-Perot resonators according to claim 1, characterized in that the first metal printed circuit (7) comprises an 8-turn metal circular bullseye pattern, the arrangement of the pattern being: the center is provided with a circle, n circles of circles are added along the radial direction by taking the length of P as a period, the width of each circle is W, and the outer circle radius of the nth circle from the center to the outside satisfies the formula: r=w+n×p, n being an integer.
4. The Fabry-Perot resonator based cone beam antenna of claim 1, wherein the second dielectric substrate (8) comprises a disc (16), a ring (12), the ring (12) being arranged around the disc (16), the disc (16) being connected to the ring (12) by 30 equally spaced stubs (13).
5. Cone-beam antenna based on Fabry-Perot resonator according to claim 4, characterized in that the second metal printed circuit (9) is printed on a disc (16) of a second dielectric substrate (8), covering the whole circle.
6. Cone-beam antenna based on Fabry-Perot resonator according to claim 4, characterized in that one stub (14) with a width 3 times the width of the remaining stubs (15) is arranged every 120 degrees out of 30 stubs (13).
7. Cone-beam antenna based on Fabry-Perot resonator according to claim 1, characterized in that the cavity edge of the FP cavity (1) is tilted towards the second dielectric substrate.
8. Tapered beam antenna based on Fabry-Perot resonator according to claim 1, characterized in that the cavity edge of the metal E-shaped cavity (3) is tilted towards the second dielectric substrate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310470168.8A CN116598761A (en) | 2023-04-27 | 2023-04-27 | Tapered beam antenna based on Fabry-Perot resonant cavity |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310470168.8A CN116598761A (en) | 2023-04-27 | 2023-04-27 | Tapered beam antenna based on Fabry-Perot resonant cavity |
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| CN116598761A true CN116598761A (en) | 2023-08-15 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202310470168.8A Pending CN116598761A (en) | 2023-04-27 | 2023-04-27 | Tapered beam antenna based on Fabry-Perot resonant cavity |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117748131A (en) * | 2023-12-06 | 2024-03-22 | 成都辰星迅联科技有限公司 | Broadband high-efficiency high-low elevation gain circular polarization cone-mode four-arm spiral antenna |
-
2023
- 2023-04-27 CN CN202310470168.8A patent/CN116598761A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117748131A (en) * | 2023-12-06 | 2024-03-22 | 成都辰星迅联科技有限公司 | Broadband high-efficiency high-low elevation gain circular polarization cone-mode four-arm spiral antenna |
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