CN103367919B - Broad band low frequency dual polarization quadruple ridged horn antenna - Google Patents
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Abstract
The invention discloses a kind of broad band low frequency dual polarization quadruple ridged horn antenna, mainly solve the test request that prior art cannot meet low frequency antenna, weight is very heavy, is not easy to rotate, the problem of processing difficulties.It comprises antenna wall (1), ridge (2), short board (3), coaxial fitting (4), feed probes (5), polyfluortetraethylene plate (6), short circuit post (7), rectangular channel (8), cylinder groove (9) and transition cone (10); The inwall of four ridges (2) all adopts engraved structure, and the top of each ridge is equipped with corner cut, and the centre of four ridges is fixed with polyfluortetraethylene plate (6); The side of short board (3) has rectangular channel (8); The top of each feed probes (5) is set to pyramidal structure, and end surface is coated with silver or this soft electric conducting material of tin.The present invention has lightweight, Stability Analysis of Structures, and low-limit frequency can be stabilized in the advantage of 75MHz, is applicable to the source antenna of low frequency antenna measurement.
Description
Technical field
The present invention relates to antenna technical field, be specifically related to a kind of broad band low frequency dual polarization quadruple ridged horn antenna, can be used for the source antenna of measuring system.
Background technology
Along with developing rapidly of wireless communication technology in modern age, broadband technology is all widely used in fields such as microwave measurement, emc testing, radar, detection system and communication systems.Especially, in emc testing and antenna measurement, applicable broadband antenna makes user measure in very wide frequency ranges and not need to change test source antenna.
Broad-band antenna the most frequently used at present has logarithm periodic antenna, biconical antenna, helical antenna and ridged horn antenna etc.But due to the restriction of gain and physical dimension, some antennas as logarithm periodic antenna are not suitable for being used in some space, as taper darkroom uses.The broad-band antenna of other kinds of ridged horn antenna ratio uses wider in recent years.Along with the development of antenna measurement, also more need to measure more accurately at lower frequency, such as, the broadcast singal that car antenna needs receive frequency lower.But, report from data at home and abroad, current quadruple ridged horn antenna low-limit frequency is approximately 100MHz, this antenna cannot meet the test request that reception low-limit frequency is the antenna of 75MHz broadcast singal, and this low-frequency antenna often bulky dimensions, and weight is very heavy, be not easy to rotate, processing difficulties, and be easy to occur error in the course of processing, cause antenna performance to be deteriorated.
Summary of the invention
The object of the invention is to the deficiency for above-mentioned existing low-frequency antenna, provide a kind of lightweight, Stability Analysis of Structures, and low-limit frequency can be stabilized in the broad band low frequency dual polarization quadruple ridged horn antenna of 75MHz.
For achieving the above object, broad band low frequency dual polarization quadruple ridged horn antenna of the present invention comprises: comprise antenna wall, short board, coaxial fitting, two feed probes, four short circuit posts and four ridges, it is characterized in that:
The inwall of each ridge all adopts engraved structure, to alleviate antenna weights;
The top of each ridge is provided with corner cut, to improve the performance of antenna in low-frequency range;
The centre of four ridges is fixed with polyfluortetraethylene plate, to improve the stability of antenna structure;
The side of short board has rectangular channel, to suppress the appearance of standing wave singular point, improves antenna low-frequency range performance.
The top of each feed probes is set to pyramidal structure, to ensure mating of feed probes and coaxial fitting, improves antenna low-frequency range performance.
Above-mentioned broad band low frequency dual polarization quadruple ridged horn antenna, is characterized in that described engraved structure, comprises honeycomb, network structure and middle hollow structure.
Above-mentioned broad band low frequency dual polarization quadruple ridged horn antenna, it is characterized in that the top corner cut of each ridge is 50 degree ~ 60 degree, width is 15mm ~ 20mm.
Above-mentioned broad band low frequency dual polarization quadruple ridged horn antenna, is characterized in that two orthogonal ridges of four chi chungs, and all digging a diameter is the cylinder groove of 11.5mm ~ 16.1mm; Each feed probes, through a cylinder groove, is fixed on another relative ridge, and the orthogonal dislocation forming two feed probes is placed.
Above-mentioned broad band low frequency dual polarization quadruple ridged horn antenna, it is characterized in that the pyramidal structure at the top of feed probes, its cone bottom diameter is 5mm ~ 7mm, and vertex of a cone diameter is 1.6mm, and cone height is 20mm ~ 40mm, to ensure mating of feed probes and coaxial fitting.
Above-mentioned broad band low frequency dual polarization quadruple ridged horn antenna, is characterized in that, the end surface of each feed probes is coated with silver or this soft electric conducting material of tin, to ensure the good contact of feed probes and ridge; Spacing between two feed probes is set to 5mm ~ 7mm, to ensure standing-wave ratio consistency and the isolation of two feed port.
Above-mentioned broad band low frequency dual polarization quadruple ridged horn antenna, it is characterized in that described polyfluortetraethylene plate, its relative dielectric constant is 4.4, and thickness is 15mm ~ 30mm.
Above-mentioned broad band low frequency dual polarization quadruple ridged horn antenna, is characterized in that the length of rectangular channel is 180mm ~ 230mmmm, and wide is 100mm ~ 150mm, and the degree of depth is 20mm ~ 40mm.
Above-mentioned broad band low frequency dual polarization quadruple ridged horn antenna, is characterized in that, it is highly 20mm ~ 40mm transition body that antenna wall is fixed with; Coaxial fitting adopts the coaxial fitting of N-type 50 Ω, and its outer conductor is connected with transition body, and inner wire is connected with feed probes, make guarantee coaxial fitting and feed probes impedance matching, and the highest resistance to power level reaches 50W by this transition body.
Above-mentioned broad band low frequency dual polarization quadruple ridged horn antenna, it is characterized in that, antenna wall is that the straight waveguide sections of 3mm ~ 8mm and flare are grouped into by thickness, and straight waveguide sections axial length is 360mm ~ 405mm, axial length is 2100mm ~ 2300mm, and the bore length of loudspeaker part and width are 2200mm ~ 2400mm.
The present invention has the following advantages:
The present invention, by all adopting engraved structure to four ridges, dramatically reduces antenna weights, prevents distortion;
The present invention, by being fixed with polyfluortetraethylene plate in the centre of four hollow out ridges, improves the stability of antenna structure;
The present invention has rectangular channel due to the side at short board, and is equipped with corner cut at the top of four ridges, and the top of each feed probes is set to pyramidal structure, makes the low-limit frequency of antenna to be stabilized in 75MHz, meets the requirement of low frequency antenna measurement.
Accompanying drawing explanation
Fig. 1 is the overall structure figure of broad band low frequency dual polarization quadruple ridged horn antenna of the present invention;
Fig. 2 is the cutaway view of Fig. 1;
Fig. 3 is the vertical view of Fig. 1;
Fig. 4 is the right cutaway view in AA place of Fig. 2;
Fig. 5 is the two-port voltage standing wave ratio simulation curve of the embodiment of the present invention 1;
Fig. 6 is the two-port isolation simulation curve of the embodiment of the present invention 1;
Fig. 7 is the gain simulation curve of the embodiment of the present invention 1;
Fig. 8 is the two-port voltage standing wave ratio simulation curve of the embodiment of the present invention 2;
Fig. 9 is the two-port isolation simulation curve of the embodiment of the present invention 2;
Figure 10 is the gain simulation curve of the embodiment of the present invention 2;
Figure 11 is the two-port voltage standing wave ratio simulation curve of the embodiment of the present invention 3;
Figure 12 is the two-port isolation simulation curve of the embodiment of the present invention 3;
Figure 13 is the gain simulation curve of the embodiment of the present invention 3;
Figure 14 is the two-port voltage standing wave ratio experiment curv of the embodiment of the present invention 1;
Figure 15 is the two-port isolation experiment curv of the embodiment of the present invention 1;
Figure 16 is the gain measurement curve of the embodiment of the present invention 1.
Embodiment
Embodiment 1
With reference to Fig. 1 ~ 4, the present invention includes antenna wall 1, ridge 2, short board 3, coaxial fitting 4, feed probes 5, polyfluortetraethylene plate 6, short circuit post 7, rectangular channel 8, cylinder groove 9 and transition body 10.Wherein:
Described antenna wall 1, is grouped into by straight waveguide sections and flare, and thickness is 6mm, and straight waveguide sections axial length is 385mm, and axial length is 2200mm, and antenna aperture length and width are 2300mm.
Described ridge 2, is set to four, is fixed on the inside of antenna wall 1.The thickness of each ridge is 49mm, and the top curve of ridge is made up of straight line portion and exponential part, and the edge of each ridge adopts aluminium solid structure, and inwall adopts honeycomb.The top of each ridge 2 is provided with corner cut, and its angle is 55 degree, and width is 18mm.Four symmetrical ridges 2 near short circuit post side with near loudspeaker bore sides, parallelly fix the polyfluortetraethylene plate 6 that two pieces of relative dielectric constants are 4.4, thickness is 20mm in the middle of straight line portion.Two orthogonal ridges of four chi chungs, all dig the cylinder groove 9 that a diameter is 14.2mm.
Described short board 3, is fixed on the rear end of antenna wall 1, and its length and width are 1160mm, and thickness is 50mm.Short board 3 has rectangular channel 8 in the side near short circuit post 7, and the length of this rectangular channel is 200mm, and wide is 120mm, and the degree of depth is 40mm.
Described coaxial fitting 4, is set to two, adopts N-type 50 Ω coaxial fitting.
Described feed probes 5, is set to two, and each feed probes 5, through a cylinder groove 9, is fixed on another relative ridge, and the orthogonal dislocation forming two feed probes is placed.The tapered structure in top of each feed probes 5, its cone bottom diameter is 6.2mm, and vertex of a cone diameter is 1.6mm, and cone height is 30mm, and its end surface is coated with silver, and the spacing between two feed probes 5 is set to 5.6mm.
Described short circuit post 7, is set to four, and length is 320mm, is fixed on antenna wall 1 inner, between four ridges 2 and short board 3.
Described transition body 10, is set to two, and be separately fixed on two orthogonal faces of antenna wall 1, be highly 30mm, the outer conductor of each coaxial fitting 4 is connected with transition body 10, and inner wire is connected with feed probes 5.
Embodiment 2
With reference to Fig. 1 ~ 4, the present invention includes antenna wall 1, ridge 2, short board 3, coaxial fitting 4, feed probes 5, polyfluortetraethylene plate 6, short circuit post 7, rectangular channel 8, cylinder groove 9 and transition body 10.Wherein:
Described antenna wall 1, is grouped into by straight waveguide sections and flare, and thickness is 8mm, and straight waveguide sections axial length is 405mm, and axial length is 2300mm, and antenna aperture length and width are 2400mm.
Described ridge 2, is set to four, is fixed on the inside of antenna wall 1.The thickness of each ridge is 54mm, and the top curve of ridge is made up of straight line portion and exponential part, and the edge of each ridge adopts aluminium solid structure, and inwall adopts network structure.The top of each ridge 2 is provided with corner cut, and its angle is 60 degree, and width is 20mm.Four symmetrical ridges 2 in the middle of straight line portion near short circuit post side and curved portion near loudspeaker bore side, parallelly fix the polyfluortetraethylene plate 6 that two pieces of relative dielectric constants are 4.4, thickness is 30mm.Two orthogonal ridges of four chi chungs, all dig the cylinder groove 9 that a diameter is 16.1mm.
Described short board 3, is fixed on the rear end of antenna wall 1, and its length and width are 1260mm, and thickness is 55mm.Short board 3 has rectangular channel 8 in the side near short circuit post 7, and the length of this rectangular channel is 230mm, and wide is 150mm, and the degree of depth is 50mm.
Described coaxial fitting 4 is identical with embodiment 1.
Described feed probes 5, its structural relation is identical with embodiment 1, and its cone bottom diameter is 7mm, and vertex of a cone diameter is 1.6mm, and cone height is 40mm, and its end surface is coated with silver.Spacing between two feed probes 5 is set to 7mm.
Described short circuit post 7, is set to four, and length is 340mm, and fixed relationship is identical with embodiment 1.
Described transition body 10, is set to two, and be separately fixed on two orthogonal faces of antenna wall, be highly 40mm, annexation is identical with embodiment 1.
Embodiment 3
With reference to Fig. 1 ~ 4, the present invention includes antenna wall 1, ridge 2, short board 3, coaxial fitting 4, feed probes 5, polyfluortetraethylene plate 6, short circuit post 7, rectangular channel 8, cylinder groove 9 and transition body 10.
This antenna wall 1, is grouped into by straight waveguide sections and flare, and structural parameters are: thickness 3mm, and straight waveguide sections axial length 360mm, axial length 2100mm, antenna aperture length and width are 2200mm.
This ridge 2, is set to four, is fixed on the inside of antenna wall 1, and the thickness of each ridge is 45mm, and the top curve of ridge is made up of straight line portion and exponential part, and the edge of each ridge adopts aluminium solid structure, hollow structure in the middle of inwall adopts.The top of each ridge 2 is provided with corner cut, and its angle is 50 degree, and width is 15mm.Four symmetrical ridges 2 near short circuit post side with near loudspeaker bore sides, parallelly fix the polyfluortetraethylene plate 6 that two pieces of relative dielectric constants are 4.4, thickness is 15mm in the middle of straight line portion.Two orthogonal ridges of four chi chungs, all dig the cylinder groove 9 that a diameter is 11.5mm.
This short board 3, is fixed on the rear end of antenna wall 1, and its length and width are 1060mm, and thickness is 40mm.Short board 3 has rectangular channel 8 in the side near short circuit post 7, and the length of this rectangular channel is 180mm, and wide is 100mm, and the degree of depth is 30mm.
This coaxial fitting 4 is identical with embodiment 1.
This feed probes 5, is set to two, and each feed probes 5, through a cylinder groove 9, is fixed on another relative ridge, and the orthogonal dislocation forming two feed probes is placed.The tapered structure in top of each feed probes 5, its cone bottom diameter is 5mm, and vertex of a cone diameter is 1.6mm, and cone height is 20mm, and its end surface is coated with tin, and the spacing between two feed probes 5 is set to 5mm.
This short circuit post 7, is set to four, and length is 300mm, is fixed on antenna wall 1 inner, between four ridges 2 and short board 3.
This transition body 10, is set to two, and being separately fixed on two orthogonal faces of antenna wall, is highly 20mm.The outer conductor of each coaxial fitting 4 is connected with transition body 10, and inner wire is connected with feed probes 5.
Effect of the present invention further illustrates by following measurement and emulation:
Emulation 1, in electromagnetic simulation software HFSS, carry out overall structure modeling to embodiment 1, voltage standing wave(VSW) such as Fig. 5 of its two-port, two-port isolation is as Fig. 6, and gain is as Fig. 7.
Show from Fig. 5 ~ 7 simulation result: in 75MHz ~ 550MHz frequency range, its two-port voltage standing wave ratio is less than 2.0, and two-port isolation is greater than 38dB, and gain is 6 ~ 18dBi.
Emulation 2, in electromagnetic simulation software HFSS, carry out overall structure modeling to embodiment 2, its two-port voltage standing wave(VSW) such as Fig. 8, two-port isolation is as Fig. 9, and gain is as Figure 10.
Show from Fig. 8 ~ 10 simulation result: in 75MHz ~ 550MHz frequency range, its two-port voltage standing wave ratio is less than 2.0, and two-port isolation is greater than 39dB, and gain is 7 ~ 16dBi.
Emulation 3, in electromagnetic simulation software HFSS, carry out overall structure modeling to embodiment 3, its two-port voltage standing wave(VSW) such as Figure 11, isolation is as Figure 12, and gain is as Figure 13.
Show from Fig. 8 ~ 10 simulation result: in 75MHz ~ 550MHz frequency range, its two-port voltage standing wave ratio is less than 2.0, and two-port isolation is greater than 30dB, and gain is 5 ~ 13.5dBi.
Measure 1, in antenna darkroom, carry out performance measurement to embodiment 1 material object, this antenna ends mouth voltage standing wave(VSW) such as Figure 14, two-port isolation is as Figure 15, and gain is as Figure 16.
Show with reference to Figure 14 ~ 16 measurement result: in 75MHz ~ 550MHz frequency range, its two-port voltage standing wave ratio is less than 2.0, and indivedual frequency is less than 2.25; Two-port isolation is greater than 30dB; Gain is 5 ~ 13dBi.
From emulating above and measuring, broad band low frequency dual polarization quadruple ridged horn antenna of the present invention is functional in 75MHz ~ 550MHz frequency range, meets the requirement of low frequency antenna measurement.
Above-described is only three preferred implementations of the present invention; but be not merely restricted to the described embodiments; for the person of ordinary skill of the art, the some distortion made under the prerequisite not departing from innovation thinking of the present invention and improvement, all belong to protection scope of the present invention.
Claims (1)
1. a broad band low frequency dual polarization quadruple ridged horn antenna, its working frequency range is 75MHz ~ 550MHz, comprise antenna wall (1), short board (3), coaxial fitting (4), two feed probes (5), four short circuit posts (7) and four ridges (2), it is characterized in that: described four ridges are fixed on the inside of antenna wall (1), the edge of each ridge (2) adopts aluminium solid structure, inwall all adopts engraved structure, to alleviate antenna weights; The top of each ridge (2) is provided with corner cut, and to improve the performance of antenna in low-frequency range, the top corner cut of each ridge (2) is 50 degree ~ 60 degree, and the width of each ridge (2) is 15mm ~ 20mm; The centre of four ridges is fixed with polyfluortetraethylene plate (6), to improve the stability of antenna structure; It is inner that described four short circuit posts (7) are fixed on antenna wall (1), is positioned between four ridges (2) and short board (3); Described short board (3) is fixed on the rear end of antenna wall (1), short board (3) has rectangular channel (8) in the side near short circuit post (7), to suppress the appearance of standing wave singular point, improve antenna low-frequency range performance; Described engraved structure comprises honeycomb, network structure or middle hollow structure; Two orthogonal ridges of four chi chungs, all dig the cylinder groove (9) that a diameter is 11.5mm ~ 16.1mm; Each feed probes (5), through a cylinder groove (9), is fixed on another relative ridge, and the orthogonal dislocation forming two feed probes is placed; The top of each feed probes (5) is set to pyramidal structure, to ensure mating of feed probes (5) and coaxial fitting (4), improve antenna low-frequency range performance, the cone bottom diameter of described pyramidal structure is 5mm ~ 7mm, vertex of a cone diameter is 1.6mm, cone height is 20mm ~ 40mm, to ensure mating of feed probes (5) and coaxial fitting (4), the end surface of each feed probes (5) is coated with silver or tin, to ensure the good contact of feed probes and ridge; Spacing between two feed probes (5) is set to 5mm ~ 7mm, to ensure standing-wave ratio consistency and the isolation of two feed port; Described polyfluortetraethylene plate (6), its relative dielectric constant is 4.4, and thickness is 15mm ~ 30mm; The length of described rectangular channel (8) is 180mm ~ 230mmmm, and wide is 100mm ~ 150mm, and the degree of depth is 20mm ~ 40mm; It is highly 20mm ~ 40mm transition body (10) that antenna wall (1) is fixed with, and described transition body is two, is separately fixed on two orthogonal faces of antenna wall (1); Coaxial fitting (4) adopts the coaxial fitting of N-type 50 Ω, its outer conductor is connected with transition body (10), inner wire is connected with feed probes (5), make guarantee coaxial fitting (4) and feed probes (5) impedance matching by this transition body, and the highest resistance to power level reaches 50W; Antenna wall (1) is grouped into by straight waveguide sections and flare, the thickness of antenna wall (1) is 3mm ~ 8mm, straight waveguide sections axial length is 360mm ~ 405mm, flare divides axial length to be 2100mm ~ 2300mm, and the bore length of loudspeaker part and width are 2200mm ~ 2400mm.
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| CN103367919B true CN103367919B (en) | 2015-09-30 |
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| CN108879110B (en) * | 2018-06-21 | 2023-07-21 | 河南师范大学 | Small broadband dual-polarized four-ridge horn antenna |
| CN109755750B (en) * | 2019-03-08 | 2020-10-20 | 北京航空航天大学 | Dual-polarized feed source for feeding of broadband ridge-added orthogonal mode converter |
| CN112886254B (en) * | 2021-02-07 | 2021-11-30 | 北京星英联微波科技有限责任公司 | Novel 5G millimeter wave dual-polarized horn antenna |
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| CN115051164B (en) * | 2022-06-21 | 2023-06-27 | 中山大学 | Broadband circular polarization horn antenna based on acceleration spiral super-elliptic double ridges |
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Effective date of registration: 20220613 Address after: 528100 No. 4, Jinye Second Road, Southwest Industrial Park, Shuiqu District, Foshan City, Guangdong Province Patentee after: GUANGDONG SHENGLU TELECOMMUNICATION TECH. Co.,Ltd. Patentee after: Guangdong Shenglu Communication Co., Ltd Address before: 528000 No. 4 Jinye Second Road, Southwest Industrial Park, Sanshui District, Foshan City, Guangdong Province Patentee before: GUANGDONG SHENGLU TELECOMMUNICATION TECH. Co.,Ltd. |