CN108063315B - Double-ridge horn antenna based on special-shaped ridge loading - Google Patents
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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
- H01Q13/02—Waveguide horns
- H01Q13/0275—Ridged horns
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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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- 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
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- 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
Abstract
The invention provides a double-ridge horn antenna based on special-shaped ridge loading, which can improve the gain radiation characteristic of the antenna while ensuring the matching characteristic in the working frequency band of the double-ridge horn antenna. The antenna comprises two opposite special-shaped ridge plates, a horn shell, a back cavity and two feeding coaxial lines; the special-shaped ridge plate comprises a back cavity matching section and a special-shaped gradual change section, wherein the ridge line of the special-shaped gradual change section is formed by smoothly connecting two exponential curves and three circular arc lines; the loudspeaker shell adopts a rectangular loudspeaker structure formed by mutually splicing a pair of curved metal walls and a pair of plane metal walls; the two special-shaped ridge plates are respectively loaded on different curved metal walls; the back cavity adopts a cuboid thin-wall structure with a cavity; the shielding layer of the feed coaxial line is connected with the back cavity, and the inner core passes through the closed end of the back cavity to be connected with the back cavity matching section; the invention has ultra-wide working band and can be applied to the fields of communication, remote sensing, antenna measurement and the like.
Description
Technical Field
The invention belongs to the technical field of antennas, relates to a double-ridge horn antenna, and in particular relates to an ultra-wideband double-ridge horn antenna based on a special-shaped ridge structure, which can be applied to the fields of communication, remote sensing, antenna measurement and the like.
Background
With the rapid development of modern wireless communication technology, many communication devices need to have a characteristic of being able to operate in a wider frequency band, and all wireless communication systems rely on antennas as transceiver devices for radio waves. Ultra-wideband antennas have been widely used in satellite communications, satellite navigation, remote sensing, doppler, radar, and other fields with their excellent wideband characteristics.
The technology of detecting and receiving electromagnetic radiation and scattering characteristics of a detected object in a microwave band by using microwave equipment to identify a remote object is called microwave remote sensing. Compared with visible light and infrared remote sensing, the microwave remote sensing is not or is less affected by cloud, rain and fog, does not need illumination conditions, and can acquire images and data all the day and time. The microwave remote sensing frequency bands commonly used in the application of the earth resources are L, C and X wave bands, wherein the lower the frequency band is, the stronger the penetrability is and the lower the resolution is; conversely, the higher the frequency band, the weaker the penetrability and the higher the resolution. Horn antennas are widely used as feed antennas or probes in microwave darkrooms for measuring and calibrating other microwave remote sensing antennas as a common receiving and transmitting antenna.
The horn antenna is a widely used microwave antenna, the radiation structure of which is composed of gradually opened waveguides, and has the advantages of simple structure, large power capacity, high gain and the like, and is used as a standard measuring antenna in a large number in a microwave measuring system. With the development of broadband radio frequency technology, the coverage of the antenna with a frequency band is required to reach a higher octave, for example, the coverage of a microwave remote sensing common band is required to realize an operating bandwidth of more than 10 octaves. Because the common horn antenna has a relatively narrow frequency band, an ultra-wideband ridged horn antenna is generated according to the broadband ridge waveguide theory.
The main difference in structure between the dual-ridge horn antenna and the common horn antenna is that a dual-ridge structure is added between the waveguide walls which are gradually opened. Its main mode TE due to the effect of its inter-ridge capacitance 10 The cut-off frequency of the mode is higher than the TE of the common horn antenna 10 The cut-off frequency of the mode is reduced much, while its first order higher order mode TE 20 The cut-off frequency of the mode is also slightly increased so that its single mode relative operating bandwidth can be broadened to several octaves. Meanwhile, the characteristic impedance of the dual-ridge horn antenna is reduced due to the effect of adding the ridge, so that the dual-ridge horn antenna can be better matched and connected with a coaxial feeder of 50 ohms after the ridge distance is adjusted.
The ridge line of the traditional double-ridge horn antenna is usually directly in an exponential curve form with a linear component, and the gradual opening degree of the double ridges can be controlled by controlling the weight of the linear component. If the double ridges are too urgent, more high-order modes are introduced to cause high-frequency directional diagram distortion, so that the usable frequency band is narrowed; if the double ridges are too slowly opened, the double ridges tend to rapidly open near the mouth surface due to the fixed caliber size, so that the impedance matching characteristic is poor.
In 2016, e.h. criollo et al published a paper titled "Improved Broadband Double Ridged Horn Antenna Without Split Radiation Pattern" in the third stage of volume 14 of the journal IEEE Latin America Transactions, which discloses a novel dual-ridge horn antenna, mainly aiming at the problem that the dual-ridge horn antenna is easy to generate pattern split in a high-frequency working section, the dual-ridge structure is improved, and the ridge line adopts a form of smooth connection of a section of arc, an exponential curve and a straight line. Compared with the traditional mode, the index gradual change part of the double-ridge structure is more gentle in opening, and can introduce stronger equivalent capacitance between ridges, so that the cut-off frequency of a main mode is reduced, and the working bandwidth is widened. Because the double-ridge horn antenna works in the vivaldi mode in the high frequency band, radiation is mainly realized through the double-ridge structure, so that the mode distribution in the frequency band can be optimized and the problem of directional diagram split can be solved by improving the double-ridge horn antenna. However, since the transition at the mouth surface is still too stiff, some gain dip points are easily generated for each frequency band.
With the prior art, the dual-ridge horn antenna still has room for improvement in terms of gain radiation characteristics.
Disclosure of Invention
The invention aims to overcome the defects in the prior art, and provides a double-ridge horn antenna based on special-shaped ridge loading, which improves the gain radiation characteristic of the antenna while ensuring the matching characteristic in the working frequency band of the double-ridge horn antenna.
In order to achieve the above purpose, the technical scheme adopted by the invention is as follows:
the double-ridge horn antenna based on the special-shaped ridge loading comprises two opposite special-shaped ridge plates 1, a horn shell 2, a back cavity 3 and two feeding coaxial lines 4; the special-shaped ridge plate 1 comprises a back cavity matching section 11 and a special-shaped transition section 12, wherein the ridge line of the special-shaped transition section 12 is formed by smoothly connecting a first exponential curve 121, a first circular arc 123, a second circular arc 124, a third circular arc 125 and a second exponential curve 122; the horn housing 2 adopts a rectangular horn structure formed by mutually splicing a pair of curved metal walls 21 and a pair of plane metal walls 22, wherein the curved metal walls 21 and the second exponential curve 122 have the same curvature; the back cavity 3 adopts a cuboid thin-wall structure with a cavity; the open end of the back cavity 3 is connected with the bottom end of the horn shell 2, the two special-shaped ridge plates 1 are respectively loaded on different curved metal walls 21, the shielding layer of the feed coaxial line 4 is connected with the back cavity 3, and the inner core penetrates through the closed end of the back cavity 3 to be connected with the back cavity matching section 11.
In the dual-ridge horn antenna based on the special-shaped ridge loading, the two opposite special-shaped ridge plates 1 are respectively loaded on the central axes of the corresponding curved metal walls 21.
According to the double-ridge horn antenna based on the special-shaped ridge loading, the two opposite special-shaped ridge plates 1 are arranged, and the distance between the two ridge plates is d, wherein d is more than or equal to 1mm and less than or equal to 3mm.
According to the dual-ridge horn antenna based on special-shaped ridge loading, the thickness of the special-shaped ridge plate 1 is from the back cavity matching section 11 to the special-shaped gradual change section 12, and the size is from t 1 Gradual change to t 2 ，1mm≤t 1 ≤4mm，5mm≤t 2 ≤50mm。
In the dual-ridge horn antenna based on the special-shaped ridge loading, the first exponential curve 121 is an exponential function curve with a linear component, and the functional expressions of the first quadrant and the second quadrant in the yoz plane are respectively:
wherein h is 1 Representing a first exponential curve gradual change curvature control variable, wherein h is more than or equal to 80mm 1 120mm or less, z represents the distance from the point on the curve to the y-axis, y-tableThe distance of the point on the curve to the z-axis is shown.
In the dual-ridge horn antenna based on the special-shaped ridge loading, the center control point coordinate of the first arc 123 is (y) 1 ,z 1 ) Radius r 1 The second arc 124 has a center control point coordinate of (y) 2 ,z 2 ) Radius r 2 The third arc 124 has a center control point coordinate of (y) 3 ,z 3 ) Radius r 3 Wherein 65 mm.ltoreq.z 1 ≤96mm，72mm≤z 2 ≤107mm，80mm≤z 3 ≤112mm，27.1mm≤y 1 ≤42.3mm，31.4mm≤y 2 ≤45mm，25mm≤y 3 ≤39.8mm，11mm≤r 1 ≤16mm，2mm≤r 2 ≤7mm，3mm≤r 3 ≤15mm。
The second exponential curve 122 is a pure exponential function curve, and the functional expressions of the first quadrant and the second quadrant of the yoz plane are respectively:
wherein h is 2 Representing a second exponential curve gradual change curvature control variable, wherein h is more than or equal to 75mm 2 And less than or equal to 95mm, wherein z represents the distance from a point on the curve to the y-axis, and y represents the distance from the point on the curve to the z-axis.
In the dual-ridge horn antenna based on the special-shaped ridge loading, the section curve of the planar metal wall 22, xoz, is a straight line segment, and the functional expressions of the first quadrant and the second quadrant in the xoz plane are respectively:
x＝0.5z+20，x＝-0.5z-20
where z represents the distance from the point on the curve to the x-axis and x represents the distance from the point on the curve to the z-axis.
The characteristic impedance of the feeding coaxial line 4 is 50 ohms based on the double-ridge horn antenna loaded by the special-shaped ridge.
Compared with the prior art, the invention has the following advantages:
1. the ridge line of the special-shaped gradual change section comprises three circular arcs, the second circular arc plays a role of smoothly connecting the first circular arc section and the third circular arc section, the double-ridge structure corresponding to the third circular arc section can inhibit diffraction effect of the edge of the radiation port surface of the loudspeaker, and compared with the double-ridge line of the reference antenna with only one circular arc section, the double-ridge structure reduces back radiation and improves gain in the main radiation direction.
2. The ridge line of the special-shaped gradual change section is formed by smoothly connecting three sections of circular arcs and two sections of exponential curves, wherein the smooth connection structure of the three sections of circular arcs and the two sections of exponential curves has a smooth transition effect on impedance transformation from a feed end to a free space, and compared with a double-ridge line of a reference antenna with only one transition circular arc, the impedance transformation transition is smoother, and the impedance matching characteristic is better.
Drawings
Fig. 1 is a schematic diagram of the overall structure of a reference antenna;
FIG. 2 is a schematic view of the overall structure of the present invention;
fig. 3 (a) is a yoz side cross-sectional view of two oppositely disposed profiled spine plates of the present invention and fig. 3 (b) is a side view of one profiled spine plate of the present invention;
fig. 4 (a) is a yoz side cross-sectional view of the horn housing 2 and back chamber 3 of the present invention, and fig. 4 (b) is a xoz side cross-sectional view of the horn housing 2 and back chamber 3 of the present invention;
FIG. 5 is a simulation comparison of S11 parameter curves of the reference antenna and the embodiment 1 of the present invention;
FIG. 6 is a simulation comparison of the achievable gain versus frequency curves for example 1 of the present invention and a reference antenna;
FIG. 7 is a simulated comparison of the gain pattern of example 1 of the present invention and a reference antenna at a frequency of 1.3 GHz;
FIG. 8 is a simulated comparison of the gain pattern of example 1 of the present invention and a reference antenna at a frequency of 5.8 GHz;
fig. 9 is a simulation comparison diagram of the gain pattern of the reference antenna of embodiment 1 at the frequency point of 12.4 GHz.
Detailed Description
The invention is further described with reference to the accompanying drawings and specific embodiments:
example 1:
referring to fig. 2, the dual-ridge horn antenna based on special-shaped ridge loading comprises two opposite special-shaped ridge plates 1, a horn shell 2, a back cavity 3 and a feeding coaxial line 4, wherein the special-shaped ridge plates 1 comprise a back cavity matching section 11 and a special-shaped gradual change section 12; the ridge line of the special-shaped transition section 12 is formed by smoothly connecting two exponential curves and three circular arcs; the horn housing 2 adopts a rectangular horn structure formed by mutually splicing a pair of curved metal walls 21 and a pair of plane metal walls 22, wherein the curved metal walls 21 and the second exponential curve 122 have the same curvature; the back cavity 3 adopts a thin-wall structure with a cavity, and the cavity space is a cuboid structure with the size of 40mm multiplied by 13 mm; the open end of the back cavity 3 is connected with the bottom end of the horn shell 2, the two special-shaped ridge plates 1 are respectively loaded on different curved metal walls 21, the shielding layer of the feed coaxial line 4 is connected with the back cavity 3, and the inner core penetrates through the closed end of the back cavity 3 to be connected with the back cavity matching section 11.
As shown in fig. 3 (a), the yoz cross-sectional view of the profiled ridge plate 1 is shown in fig. 3 (a), in which in the first quadrant, the first exponential curve section 121 is smoothly tangent to the first circular arc section 123, then is smoothly tangent to the second circular arc section 124 and the third circular arc section 125 in sequence, and finally is connected to the second exponential curve section 122, wherein the expression of the first exponential curve section 121 is that
h 1 ＝110mm，h 1 The expression representing the first exponential curve progressive curvature control variable, the second exponential curve section 122 is +.>
h 2 =90 mm, where h 2 Representing the gradient curvature control variable of the second exponential curve, and the center control point coordinates (y) corresponding to the first arc segment 123 1 ,z 1 ) Is (33.4 mm,80.9 mm) with radius r 1 =14.7mm, the center control point coordinates corresponding to the second arc segment 124 (y 2 ,z 2 ) For (39 mm,91 mm), its radiusR is 2 =6mm, the center control point coordinates corresponding to the third arc segment 125 (y 3 ,z 3 ) Is (32 mm,105.6 mm) with radius r 3 The distance between two ridge plates is d=1.5 mm, and the back cavity matching section 11 is formed by a pair of inverted-C-shaped structures symmetrical to the xoy plane of the double-ridge horn antenna, and plays a role in regulating and controlling impedance matching.
A side view of the profiled spine panel 1 is shown in fig. 3 (b), wherein the back cavity matching section 11 has a thickness t 1 The thickness of the special-shaped transition section 12 is equal to 3mm, and the size of the special-shaped transition section along the direction from the back cavity matching section to the special-shaped transition section is equal to t 1 =3mm uniform gradual change to t 2 ＝12mm。
As shown in fig. 4 (a), a yoz sectional view of the horn housing 2 and the back chamber 3 shows two exponential curves, which are the same as the second exponential curves 122 corresponding to the two curves.
As shown in fig. 4 (b), a xoz screenshot of the speaker housing 2 and the back cavity 3 has two straight lines, namely two oblique lines, and the functional expressions in the first quadrant and the second quadrant are respectively: x=0.5z+20, x= -0.5z-20
Example 2:
the structure of this embodiment is the same as that of embodiment 1, and only the distance d between two ridge plates of two opposite profiled ridge plates 1 and the thickness t of the profiled transition 12 are as follows 1 T 2 The first exponential curve 121 tapers the curvature control variable h 1 Gradual change curvature control variable h of second exponential curve 122 2 And the parameters of the three circular arcs are adjusted:
the double ridge spacing d=1mm of the special-shaped ridge plate 1; the thickness of the special-shaped transition section 12 is from bottom to top from t 1 =1mm uniform gradual change to t 2 =5 mm; the first exponential curve expression is
h 1 =80 mm, the second exponential curve expression is +.>
h 2 Circle center control point corresponding to the first arc segment 123 is located at the position of =75mmTarget (y) 1 ,z 1 ) Is (27.1 mm,65 mm) with radius r 1 =11 mm, the center control point coordinates corresponding to the second arc segment 124 (y 2 ,z 2 ) Is (31.4 mm,72 mm) with radius r 2 =2mm, (y) of the center control point coordinates corresponding to the third arc segment 125 3 ,z 3 ) Is (25 mm,80 mm) with radius r 3 ＝3mm。
Example 3:
the structure of this embodiment is the same as that of embodiment 1, and only the distance d between two oppositely arranged profiled ridges 1 and the thickness t of the profiled transition 12 are as follows 1 T 2 The first exponential curve 121 tapers the curvature control variable h 1 Gradual change curvature control variable h of second exponential curve 122 2 And the parameters of the three circular arcs are adjusted:
the double ridge spacing d=3mm of the special-shaped ridge plate 1; the thickness of the special-shaped transition section 12 is from bottom to top from t 1 =4mm uniform gradual change to t 2 =50mm; the first exponential curve expression is
h 1 =120 mm, the second exponential curve expression is +.>
h 2 =95 mm; the center of the circle corresponding to the first arc segment 123 controls the point coordinates (y 1 ,z 1 ) Is (42.3 mm,96 mm) with a radius r 1 =16mm, the center control point coordinates corresponding to the second arc segment 124 (y 2 ,z 2 ) Is (45 mm,107 mm) with radius r 2 =7mm, the center control point coordinates corresponding to the third arc segment 125 (y 3 ,z 3 ) Is (39.8 mm,112 mm) with radius r 3 ＝15mm。
The technical effects of the invention are further described by simulation experiments:
1. simulation conditions and content:
simulation utilizes commercial simulation software hfss_15.0;
the structure of the reference antenna used in simulation is shown in fig. 1, because the high-frequency gain radiation characteristic of the dual-ridge horn antenna is mainly determined by the dual-ridge structure of the horn antenna, and the influence of other structures on the gain radiation characteristic is smaller, in order to facilitate comparison, the control variables are controlled, the horn shell, the back cavity, the feeding coaxial line and the feeding mode adopted by the reference antenna are consistent with the invention, and the dual-ridge form in the dual-ridge horn antenna in the prior art is applied to the reference antenna to be compared with the invention.
2. simulation result analysis:
referring to FIG. 5, the operating band of the present invention in embodiment 1 is 1.2GHz-15GHz, up to 12.5 octaves or more, with S11-10 dB as the standard, and the in-band matching characteristics are improved compared with the reference antenna.
Referring to fig. 6, in embodiment 1, the gain fluctuation in the frequency band of 1.2GHz-13GHz is smaller, and compared with the reference antenna, the gain in the high frequency band can be improved.
Referring to fig. 7, the directivity diagram of the present invention at 1.2GHz at low frequency of the reference antenna in embodiment 1 shows stable lobe-free characteristics with little difference in gain characteristics.
Referring to fig. 8, the directivity diagram of the present invention and the reference antenna at low frequency 5.8GHz in embodiment 1 shows stable lobe-free characteristics, and the gain of the present invention is 0.8dB higher than that of the reference antenna in the maximum radiation direction.
Referring to fig. 9, the directivity diagram of the present invention and the reference antenna at the low frequency of 12.4GHz in embodiment 1 shows a stable lobe-free characteristic, and the gain of the present invention is 2.3dB higher than that of the reference antenna in the maximum radiation direction.
The simulation result shows that the double-ridge horn antenna based on the special-shaped ridge loading provided by the invention has good in-band matching characteristics and radiation characteristics in the working bandwidth of more than 10 octaves. Compared with a reference antenna, the in-band matching characteristic is better, and the gain of a high-frequency band is higher.
The above description is only three embodiments of the invention and does not constitute any limitation of the invention, it will be obvious to those skilled in the art that various modifications and changes in form and details may be made without departing from the principles, construction of the invention, but these modifications and changes based on the idea of the invention are still within the scope of the claims of the invention.
Claims (9)
1. The double-ridge horn antenna based on the special-shaped ridge loading is characterized by comprising two opposite special-shaped ridge plates (1), a horn shell (2), a back cavity (3) and two feeding coaxial lines (4); the special-shaped ridge plate (1) comprises a back cavity matching section (11) and a special-shaped gradual change section (12), wherein the ridge line of the special-shaped gradual change section (12) is formed by smoothly connecting a first exponential curve (121), a first circular arc (123), a second circular arc (124), a third circular arc (125) and a second exponential curve (122); the loudspeaker shell (2) adopts a rectangular loudspeaker structure formed by mutually splicing a pair of curved metal walls (21) and a pair of plane metal walls (22), wherein the curved metal walls (21) and the second index curve (122) have the same curvature; the back cavity (3) adopts a cuboid thin-wall structure with a cavity; the open end of back cavity (3) is connected with the bottom of loudspeaker shell (2), and two dysmorphism back plates (1) are loaded respectively on curved surface metal wall (21) of difference, the shielding layer of feed coaxial line (4) is connected with back cavity (3), and the inner core passes the blind end in back cavity (3) and is connected with back cavity matching section (11).
2. Dual-ridged feedhorn based on profiled ridge loading according to claim 1, characterized in that the two oppositely arranged profiled ridge plates (1) are each loaded on a central axis on a different curved metal wall (21).
3. The dual-ridge horn antenna based on the special-shaped ridge loading according to claim 1, wherein the two oppositely arranged special-shaped ridge plates (1) have a distance d which is more than or equal to 1mm and less than or equal to 3mm.
4. Dual-ridged feedhorn based on shaped-ridged loading according to claim 1, characterized in that the shaped-ridged plate (1) has a thickness in the direction from the back cavity matching section (11) to the shaped transition section (12), the dimension being defined by t 1 Gradual change to t 2 ，1mm≤t 1 ≤4mm，5mm≤t 2 ≤50mm。
5. The dual-ridge feedhorn based on shaped-ridge loading according to claim 1, characterized in that the first exponential curve (121) is an exponential function curve with a linear component, whose functional expressions in the first and second quadrants, respectively, lying in the yoz plane are:
wherein h is 1 Representing a first exponential curve gradual change curvature control variable, wherein h is more than or equal to 80mm 1 120mm or less, z represents the distance from the point on the curve to the y-axis, and y represents the distance from the point on the curve to the z-axis.
6. Dual-ridge horn antenna based on shaped ridge loading according to claim 1, characterized in that the first circular arc (123) has a centre control point coordinate (y 1 ,z 1 ) Radius r 1 The second circular arc (124) has a center control point coordinate of (y) 2 ,z 2 ) Half, halfThe diameter is r 2 The third circular arc (125) has a center control point coordinate of (y) 3 ,z 3 ) Radius r 3 Wherein 65 mm.ltoreq.z 1 ≤96mm，72mm≤z 2 ≤107mm，80mm≤z 3 ≤112mm，27.1mm≤y 1 ≤42.3mm，31.4mm≤y 2 ≤45mm，25mm≤y 3 ≤39.8mm，11mm≤r 1 ≤16mm，2mm≤r 2 ≤7mm，3mm≤r 3 ≤15mm。
7. The dual-ridge horn antenna based on shaped-ridge loading according to claim 1, wherein the second exponential curve (122) is a pure exponential function curve with the functional expressions of the first quadrant and the second quadrant located in the yoz plane being respectively:
wherein h is 2 Representing a second exponential curve gradual change curvature control variable, wherein h is more than or equal to 75mm 2 And less than or equal to 95mm, wherein z represents the distance from a point on the curve to the y-axis, and y represents the distance from the point on the curve to the z-axis.
8. The dual-ridge feedhorn based on shaped ridge loading according to claim 1, characterized in that the planar metal wall (22) has a xoz cross-section curve with a straight line segment, and the functional expressions of the first and second quadrants lying in xoz plane are:
x＝0.5z+20，x＝-0.5z-20
where z represents the distance from the point on the curve to the x-axis and x represents the distance from the point on the curve to the z-axis.
9. Dual-ridge feedhorn antenna based on shaped ridge loading according to claim 1, characterized in that the fed coaxial line (4) has a characteristic impedance of 50 ohms.
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| CN108682959B (en) * | 2018-06-21 | 2023-09-15 | 河南师范大学 | Small-size millimeter wave horn antenna |
| CN110600877A (en) * | 2019-09-12 | 2019-12-20 | 哈尔滨工业大学 | Ultra-wideband double-ridge horn antenna for 1-40GHz frequency band |
| CN112366455B (en) * | 2020-10-29 | 2022-12-27 | 中国电子科技集团公司第二十研究所 | Asymmetric double-ridge horn antenna |
| CN114256607B (en) * | 2021-12-22 | 2022-12-13 | 电子科技大学 | High-power ultra-wideband electromagnetic radiation antenna |
| CN115528434A (en) * | 2022-10-21 | 2022-12-27 | 嘉兴诺艾迪通信科技有限公司 | Ultra-wideband double-ridge horn antenna with ridge end loading |
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|---|---|---|---|---|
| KR20100105328A (en) * | 2009-03-17 | 2010-09-29 | 한국전자통신연구원 | Double-ridged horn antenna with higher-order mode suppressor |
| CN103107423A (en) * | 2013-02-03 | 2013-05-15 | 北京工业大学 | Double-spine horn antenna for dielectric cylinder scratching action |
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| Publication number | Publication date |
|---|---|
| CN108063315A (en) | 2018-05-22 |
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