CN114678691A - Low profile broadband conformal antenna elements and arrays - Google Patents
Low profile broadband conformal antenna elements and arrays Download PDFInfo
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- CN114678691A CN114678691A CN202210210103.5A CN202210210103A CN114678691A CN 114678691 A CN114678691 A CN 114678691A CN 202210210103 A CN202210210103 A CN 202210210103A CN 114678691 A CN114678691 A CN 114678691A
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q9/00—Electrically-short antennas having dimensions not more than twice the operating wavelength and consisting of conductive active radiating elements
- H01Q9/04—Resonant antennas
- H01Q9/0407—Substantially flat resonant element parallel to ground plane, e.g. patch antenna
- H01Q9/045—Substantially flat resonant element parallel to ground plane, e.g. patch antenna with particular feeding 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
- H01Q1/002—Protection against seismic waves, thermal radiation or other disturbances, e.g. nuclear explosion; Arrangements for improving the power handling capability of an antenna
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/27—Adaptation for use in or on movable bodies
- H01Q1/28—Adaptation for use in or on aircraft, missiles, satellites, or balloons
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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
- H01Q1/42—Housings not intimately mechanically associated with radiating elements, e.g. radome
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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
- H01Q21/00—Antenna arrays or systems
- H01Q21/06—Arrays of individually energised antenna units similarly polarised and spaced apart
- H01Q21/20—Arrays of individually energised antenna units similarly polarised and spaced apart the units being spaced along or adjacent to a curvilinear path
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Abstract
The invention provides a low-profile broadband conformal antenna unit and an array, wherein the low-profile broadband conformal antenna unit comprises: a carrier having an open cavity; a cell structure comprising: a rectangular ground disposed on an inner side surface of the cavity; the L-shaped feed unit is arranged in the cavity and comprises a gradually-changed feed patch and a gradually-changed feed probe which are vertically arranged, wherein the gradually-changed feed probe is vertical to the bottom surface of the cavity; the feed structure is arranged in the cavity and is respectively connected with the rectangular ground and the gradual change type feed probe; the antenna housing is arranged at the opening of the cavity body to cover the opening and is conformal with the carrier; conformal radiating element and parasitic radiating element, the interval sets up and all laminates the one side of setting towards the cavity at the antenna house, all conformal with the antenna house. The problem that the traditional L-shaped feed antenna is of a planar structure, the working bandwidth is limited, and the requirement for covering wide-angle-domain beams under the installation constraint of a special-shaped surface of an aircraft platform is difficult to meet can be solved.
Description
Technical Field
The invention belongs to the technical field of radar and broadband wireless communication, and relates to a low-profile broadband conformal antenna unit and an array, which can be applied to receiving and transmitting broadband radio-frequency signals.
Background
The L-shaped feed antenna has the common advantages of a micro-strip antenna such as miniaturization, low profile, low cost, light weight and the like, and simultaneously, the problem of narrow bandwidth of the common micro-strip antenna is also solved. Currently L-feed antennas are usually composed of a horizontal probe and a vertical probe and a radiating patch located above the probes. The vertical part and the horizontal part of the L-shaped probe can be coupled with the radiating patch for feeding, and the inductive reactance and the capacitive reactance generated between the vertical part and the horizontal part can interact with each other to generate resonance, so that the frequency band of the antenna can be widened. Because of the above advantages, the L-shaped probe feed antenna is widely used in communication systems. However, the conventional L-shaped feed antenna has a planar structure and a limited working bandwidth, and it is difficult to meet the requirement of wide-angle-range beam coverage under the installation constraint of the aircraft platform irregular surface.
Disclosure of Invention
The present invention is directed to solving at least one of the problems of the prior art.
To this end, the present invention provides a low profile broadband conformal antenna element and array.
The technical solution of the invention is as follows:
according to an aspect, there is provided a low-profile broadband conformal antenna unit, comprising:
A carrier having an open cavity thereon;
a cell structure, the cell structure comprising:
a rectangular ground disposed on an inner side surface of the cavity;
the L-shaped feed unit is arranged in the cavity and comprises a gradually-changed feed patch and a gradually-changed feed probe which are vertically arranged, wherein the gradually-changed feed probe is vertical to the bottom surface of the cavity;
the feed structure is arranged in the cavity and is respectively connected with the rectangular ground and the gradual change type feed probe;
a radome disposed at an opening of the cavity to cover the opening, the radome conforming to the carrier;
conformal radiating element and parasitic radiating element, conformal radiating element and parasitic radiating element interval set up and all laminate the setting and are in the one side of the orientation cavity of antenna house, conformal radiating element and parasitic radiating element all with the antenna house is conformal, is used for high frequency electromagnetic signal's radiation jointly.
Further, the gradual change type feed probe is a circular truncated cone structure, the axis of the circular truncated cone structure is perpendicular to the bottom surface of the cavity, the top surface of the circular truncated cone structure is connected with the feed structure, the bottom surface of the circular truncated cone structure is connected with the gradual change type feed patch, the top surface is arranged close to the bottom surface of the cavity, and the area of the top surface is smaller than that of the bottom surface.
Furthermore, the gradual change type feed patch is an isosceles trapezoid structure, one side of the isosceles trapezoid structure where the lower bottom is located is connected with the bottom surface of the circular truncated cone structure, and the projection of the lower bottom on the bottom surface is completely overlapped with the diameter of the bottom surface.
Further, the modified feeding patch and the modified feeding probe are integrally formed.
Further, the antenna housing is made of a wave-transparent material.
Further, the feeding structure is a coaxial line feeding structure and comprises an inner conductor and an outer conductor which are coaxially arranged, wherein the inner conductor is connected with the gradual change type feeding probe, and the outer conductor is connected with the rectangular ground.
Further, the cavity is a rectangular metal cavity, and/or projections of the conformal radiation unit and the parasitic radiation unit on the bottom surface of the cavity are both rectangular.
According to another aspect, a low-profile broadband conformal antenna array is provided, which comprises a plurality of the above-mentioned low-profile broadband conformal antenna elements.
Further, in the antenna array, carriers of a plurality of low-profile broadband conformal antenna elements form an integrated structure.
Further, the plurality of unit structures included in the antenna array are divided into a first group and a second group, wherein the first group includes the plurality of unit structures, the second group also includes the plurality of unit structures, the plurality of unit structures of the first group and the plurality of unit structures of the second group are all arranged at intervals along the first direction of the integrated structure, and the plurality of unit structures of the first group and the plurality of unit structures of the second group are also arranged on two sides of the integrated structure relatively and are arranged in a one-to-one correspondence manner.
According to the technical scheme, the L-shaped feed unit comprises the feed probe and the feed patch which are of the gradual change structure, so that impedance matching can be improved, and the bandwidth can be expanded. Meanwhile, because the antenna unit is placed in the metal cavity, the gain is increased but the standing wave condition is worsened, the antenna unit comprises a conformal radiation unit and a parasitic radiation unit through a design unit, an antenna housing, namely a medium matching layer, is designed on the two radiation patches, and the medium matching layer is made to be conformal with the surface of the carrier, so that the standing wave condition of the antenna can be improved, the gain of the antenna in a required angle range is improved, the radiation directional diagram of the antenna is enabled to be wholly deviated towards the downward direction of the azimuth angle, and the gain bandwidth of the antenna is widened.
The antenna unit provided by the invention is wide-angle-range, high-gain and miniaturized, is conformal with the surface of the carrier, and meets the requirements of low standing wave, high gain and wide bandwidth in a specific lateral angle range in a required frequency band.
Drawings
The accompanying drawings, which are included to provide a further understanding of the embodiments of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the principles of the invention. It is obvious that the drawings in the following description are only some embodiments of the invention, and that for a person skilled in the art, other drawings can be derived from them without inventive effort.
Fig. 1 is a top view of a low profile broadband conformal antenna array of the present invention;
FIG. 2 is a front view of FIG. 1;
fig. 3 is an exploded view of a low-profile broadband conformal antenna unit of the present invention.
FIG. 4 is a standing wave diagram of an L-shaped tapered probe fed conformal antenna of the present invention;
fig. 5 is a gain curve of the antenna unit of the invention at a low frequency f1 when the azimuth angle is in the range of 45-135 and the pitch angle is selected to be three angles of 75, 95 and 105.
Fig. 6 is a gain curve of the antenna unit of the present invention at a medium frequency f2 when the azimuth angle is in the range of 45 ° -135 ° and the pitch angle is selected to be three angles of 75 °, 95 °, and 105 °.
Fig. 7 is a gain curve of the antenna unit of the invention at a high frequency f3 when the azimuth angle is in the range of 45-135 and the pitch angle is selected to be three angles of 75, 95 and 105.
Reference numerals:
1-an antenna housing; 2-a parasitic radiating element; 3-a conformal radiating element; 4-a graded feed patch; 5-an integral structure; 5 a-a carrier; 6-tapered feed probe; 7-rectangular ground; 8-an outer conductor; 9-an inner conductor; 10-a cavity; 11-unit structure.
Detailed Description
It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict. The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the invention, its application, or uses. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of exemplary embodiments according to the present application. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, and it should be understood that when the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof, unless the context clearly indicates otherwise.
The relative arrangement of the components and steps, the numerical expressions and numerical values set forth in these embodiments do not limit the scope of the present invention unless specifically stated otherwise. Meanwhile, it should be understood that the sizes of the respective portions shown in the drawings are not drawn in an actual proportional relationship for the convenience of description. Techniques, methods, and apparatus known to those of ordinary skill in the relevant art may not be discussed in detail but are intended to be part of the specification where appropriate. In all examples shown and discussed herein, any particular value should be construed as merely illustrative, and not limiting. Thus, other examples of the exemplary embodiments may have different values. It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, further discussion thereof is not required in subsequent figures.
As shown in fig. 1-7, in one embodiment of the present invention, a low-profile broadband conformal antenna unit is provided, which includes a carrier 5a and a unit structure 11, wherein the carrier 5a has an open cavity 10 thereon; the unit structure 11 comprises a rectangular ground 7, an L-shaped feeding unit, a feeding structure, an antenna cover 1, a conformal radiating unit 3 and a parasitic radiating unit 2, wherein the rectangular ground 7 is arranged on the inner side surface of the cavity 10; the feed unit is arranged in the cavity 10 and comprises a gradually-changed feed patch 4 and a gradually-changed feed probe 6 which are arranged perpendicularly to each other, wherein the gradually-changed feed probe 6 is perpendicular to the bottom surface of the cavity 10; the feeding structure is arranged in the cavity 10 and is respectively connected with the rectangular ground 7 and the graded feeding probe 6; the radome 1 is disposed at an opening of the cavity 10 to cover the opening, the radome 1 conforming to the carrier 5 a; conformal radiating element 3 and parasitic radiating element 2 interval set up and all laminate the setting and are in the one side towards cavity 10 of antenna house 1, conformal radiating element 3 and parasitic radiating element 2 all with antenna house 1 is conformal, is used for high frequency electromagnetic signal's radiation jointly.
For example, the cavity 10 may be a rectangular metal cavity 10, the depth of the cavity 10 may be 67.03mm, and the planar dimension may be 150mm by 150mm, as an installation environment of the unit structure 11.
For example, the tapered feeding patch 4 and the tapered feeding probe 6, the conformal radiating element 3 and the parasitic radiating element 2 are all patches, and are all ideal conductors. Wherein, the gradual change type feed probe 6 is excited by the feed structure, and the feed patch is used for coupling feeding to the upper conformal radiation unit 3.
Therefore, according to the technical scheme, the L-shaped feed unit comprises the feed probe and the feed patch which are of the gradual change structure, so that impedance matching can be improved, and the bandwidth can be expanded. Meanwhile, because the antenna unit is placed in the metal cavity, the gain is increased but the standing wave condition is worsened, the antenna unit comprises a conformal radiation unit and a parasitic radiation unit through a design unit, an antenna housing, namely a medium matching layer, is designed on the two radiation patches, and the medium matching layer is made to be conformal with the surface of the carrier, so that the standing wave condition of the antenna can be improved, the gain of the antenna in a required angle range is improved, the radiation directional diagram of the antenna is enabled to be wholly deviated towards the downward direction of the azimuth angle, and the gain bandwidth of the antenna is widened.
That is, in the embodiment of the present invention, by applying the metal cavity, the feed unit in the gradual change shape, and the design of the antenna cover and the radiation unit, the antenna unit maintains the characteristics of small size, wide frequency band, and wide angular range and high gain beam coverage under the conformal condition of the radiation unit.
According to an embodiment of the present invention, in order to implement an L-band antenna scheme of lateral radiation, the cavity 10 is designed to be located on the side surface of the carrier 5a, that is, a metal cavity 10 is formed on the side surface of the carrier 5a, and the feeding unit and the radiating unit are disposed inside the cavity 10 to form an L-shaped probe feeding antenna, which satisfies the L-band antenna scheme of lateral radiation implemented in the metal cavity 10 on the side surface of the carrier 5 a.
In the above embodiments, to better improve impedance matching and thus better extend the bandwidth:
the tapered feed probe 6 is of a circular truncated cone structure, the axis of the circular truncated cone structure is perpendicular to the bottom surface of the cavity 10, the top surface of the circular truncated cone structure is connected with the feed structure, the bottom surface of the circular truncated cone structure is connected with the tapered feed patch 4, the top surface is arranged close to the bottom surface of the cavity 10, and the area of the top surface is smaller than that of the bottom surface.
The gradual change type feed patch 4 is of an isosceles trapezoid structure, one side of the lower bottom of the isosceles trapezoid structure is connected with the bottom surface of the circular truncated cone structure, and the projection of the lower bottom on the bottom surface is completely coincided with the diameter of the bottom surface.
That is, in a direction away from the bottom surface of the cavity 10, the radius of the tapered feed probe 6 increases with increasing height, assuming an inverted truncated cone configuration. The upper end of the gradual change type feed probe 6 is connected with a gradual change type feed patch 4, the width of the gradual change type feed patch is reduced along with the increase of the length, and the gradual change type feed patch is in an isosceles trapezoid shape. That is, the embodiment of the present invention is based on the basic broadband principle of the L-shaped probe feed antenna, and by designing the specific gradual change shapes of the gradual change type feed probe 6 and the gradual change type feed patch 4 to be in a position relationship, the impedance matching can be better improved, and the bandwidth can be better expanded.
Preferably, the modified feeding patch and the modified feeding probe 6 are integrally formed.
In the above embodiments, in order to better improve the influence of the reflection of the metal cavity on the standing wave, the radome 1 is made of a wave-transparent material.
That is, when the periphery of the L-shaped probe feed antenna is an ideal electrical boundary, the performance of the L-shaped probe feed antenna at low and medium frequencies is greatly deteriorated due to the strong reflection effect caused by the conductor boundary, and to this problem, in the embodiment of the present invention, a layer of wave-transmitting material is added above the two radiation patches, so that the wave-transmitting material is conformal with the surface of the carrier 5a, thereby improving the influence of the reflection of the metal cavity 10 on the standing wave, and finally realizing the improvement of the standing wave performance of the antenna at low and medium frequency bands, and simultaneously improving the performance of the antenna without changing the shape of the radiation unit, and realizing the conformal effect.
According to an embodiment of the invention, the feeding structure is a coaxial line feeding structure comprising an inner conductor 9 and an outer conductor 8 arranged coaxially, wherein the inner conductor 9 is connected with the graded feeding probe 6 and the outer conductor 8 is connected with the rectangular ground 7.
That is, the lower end of the graded feeding probe 6 is connected with the inner conductor 9 for feeding excitation, and the graded feeding patch 4 performs coupling feeding on the upper conformal radiating element 3. The outer conductor 8 of the coaxial line feed structure is connected to the rectangular ground 7.
In the embodiment of the invention, the coaxial line feed structure comprises an inner conductor 9, an outer conductor 8 and an excitation port, wherein the outer conductor 8 is supported on the part of the rectangular ground 7, a hole is formed in the specific position of the rectangular ground 7, the diameter of the hole is 9.2mm, and the coaxial line outer conductor 8 is connected with the rectangular ground 7. The upper end of the inner conductor 9 is connected with the lower end of the gradual change type feed probe 6, the diameter of the inner conductor 9 is 4mm, the length of the inner conductor is 6mm, and the length of the inner conductor is reserved for an excitation port and does not affect the performance of the antenna. The characteristic impedance of the coaxial line feed structure is 50 omega.
Preferably, the diameter of the lower end of the tapered feed probe 6 is 4mm, the diameter of the inner conductor 9 is 12mm, and the diameter of the upper end of the tapered feed probe 6 is 27.105 mm. The width of the end of the gradual change type feed patch 4 connected with the gradual change type feed probe 6 is 12mm, the width of the far end is 3mm, and the length is 19 mm.
Preferably, the projections of the conformal radiation unit 3 and the parasitic radiation unit 2 on the bottom surface of the cavity 10 are both rectangular.
In the present embodiment, the conformal radiating element 3 is an ideal conductor, and is excited by coupling feeding via the graded feeding patch 4. The conformal radiation unit 3 is conformal with the radome 1, that is, the conformal radiation unit 3 is rectangular in arc surface, and the projection surface in the direction along the metal cavity 10 is rectangular, and the size after the extension is 55mm × 35 mm.
In the present embodiment, the parasitic radiating element 2 is an ideal conductor, and has the same horizontal height as the conformal radiating patch, and the distance between the centers of the two is 89.5 mm. The parasitic radiation element 2 is conformal to the radome 1, and has a rectangular arc surface with a dimension of 60mm by 39mm after being extended.
In addition, the size of the rectangular ground 7 in the above embodiment may be 150mm by 150mm, which may be used as a reference ground of the antenna.
As shown in fig. 1-2, according to another embodiment of the present invention, a low-profile broadband conformal antenna array is provided, which includes a plurality of low-profile broadband conformal antenna elements as described above.
That is, the embodiment of the invention further constructs an antenna array based on the antenna unit, and lays a foundation for high-precision direction finding.
Preferably, in the antenna array, the carrier 5a of the plurality of low-profile broadband conformal antenna elements is a unitary structure 5.
That is, the carriers 5a of the low-profile broadband conformal antenna elements are part of the unitary structure 5, and the carriers 5a together form the unitary structure 5, which unitary structure 5 serves as a carrier for the entire array, as shown in fig. 1-2, a cylinder-like unitary structure 5 having a radius of approximately 300 mm.
In the above embodiment, in order to implement a side antenna array, the antenna array includes a plurality of unit structures 11 that are divided into a first group and a second group, where the first group includes the plurality of unit structures 11, the second group also includes the plurality of unit structures 11, the plurality of unit structures 11 of the first group and the plurality of unit structures 11 of the second group are both disposed at intervals along the first direction of the integrated structure 5, and the plurality of unit structures 11 of the first group and the plurality of unit structures 11 of the second group are further disposed on two sides of the integrated structure 5 in an opposite manner and are disposed in a one-to-one correspondence manner.
That is, the antenna array includes the integrated structure 5, two sets of cavities 10 are provided on the integrated structure 5, each set of cavities 10 includes a plurality of cavities 10 spaced along a first direction of the integrated structure 5, the two sets of cavities 10 are symmetrically disposed on two sides of the integrated structure 5, the plurality of cavities 10 of one set of cavities 10 serve as an installation environment of the plurality of unit structures 11 of the first set, and the plurality of cavities 10 of the other set of cavities 10 serve as an installation environment of the plurality of unit structures 11 of the second set, and a connection relationship is consistent with the antenna unit.
For example, the first direction may be an axial direction of the unitary structure 5.
As shown in fig. 4, the standing waves of the L-shaped tapered probe fed conformal antenna unit of the present invention are less than 3.0 in a relative bandwidth of more than 25%.
As shown in FIG. 5, the L-shaped tapered probe fed conformal antenna unit of the invention has a minimum gain of 0.78dBi within a pitch angle range of-15 to 15 degrees and an azimuth angle range of 45 to 135 degrees at a low frequency f 1. (three curves are respectively 15 degrees at top, 5 degrees at bottom and 15 degrees at bottom from top to bottom)
As shown in FIG. 6, the L-shaped tapered probe fed conformal antenna unit has a minimum gain of 1.82dBi within a pitch angle range of-15 to 15 degrees and an azimuth angle range of 45 to 135 degrees at an intermediate frequency f 2. (three curves are respectively 15 degrees at top, 5 degrees at bottom and 15 degrees at bottom from top to bottom)
As shown in FIG. 7, the L-shaped tapered probe fed conformal antenna unit of the invention has a minimum gain of 0.76dBi within a pitch angle range of-15 to 15 degrees and an azimuth angle range of 45 to 135 degrees at a high frequency f 3. (three curves are respectively 15 degrees at top, 5 degrees at bottom and 15 degrees at bottom from top to bottom)
In summary, the present invention provides a lateral antenna with wide angular range, high gain, miniaturization of lateral elements, and conformal to the surface of a carrier, which meets the requirements of low standing wave, high gain, and wide bandwidth in a specific lateral angular range within a required frequency band, and further constructs an antenna array based on the antenna, thereby laying a foundation for high-precision direction finding.
Spatially relative terms, such as "above … …", "above … …", "above … …", "above", and the like, may be used herein for ease of description to describe one device or feature's spatial relationship to another device or feature as illustrated in the figures. It will be understood that the spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if a device in the figures is turned over, devices described as "above" or "on" other devices or configurations would then be oriented "below" or "under" the other devices or configurations. Thus, the exemplary term "above … …" can include both an orientation of "above … …" and "below … …". The device may be otherwise variously oriented (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.
It should be noted that the terms "first", "second", and the like are used to define the components, and are only used for convenience of distinguishing the corresponding components, and unless otherwise stated, the terms have no special meaning, and therefore, the scope of the present invention should not be construed as being limited.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. A low-profile broadband conformal antenna unit, comprising:
a carrier having an open cavity therein;
a cell structure, the cell structure comprising:
a rectangular ground disposed on an inside surface of the cavity;
the L-shaped feed unit is arranged in the cavity and comprises a gradual change type feed patch and a gradual change type feed probe which are vertically arranged, wherein the gradual change type feed probe is vertical to the bottom surface of the cavity;
the feed structure is arranged in the cavity and is respectively connected with the rectangular ground and the gradual change type feed probe;
a radome disposed at an opening of the cavity to cover the opening, the radome conforming to the carrier;
Conformal radiating element and parasitic radiating element, conformal radiating element and parasitic radiating element interval set up and all laminate the setting and be in the one side of orientation cavity of antenna house, conformal radiating element and parasitic radiating element all with the antenna house is conformal, is used for high frequency electromagnetic signal's radiation jointly.
2. The low-profile broadband conformal antenna unit according to claim 1, wherein the tapered feed probe is a truncated cone structure, an axis of the truncated cone structure is perpendicular to the bottom surface of the cavity, a top surface of the truncated cone structure is connected to the feed structure, and the bottom surface of the truncated cone structure is connected to the tapered feed patch, wherein the top surface is disposed close to the bottom surface of the cavity, and an area of the top surface is smaller than an area of the bottom surface.
3. The low-profile broadband conformal antenna unit according to claim 2, wherein the tapered feed patch is an isosceles trapezoid structure, a side of the isosceles trapezoid structure where a lower bottom is located is connected to the bottom surface of the truncated cone structure, and a projection of the lower bottom on the bottom surface completely coincides with a diameter of the bottom surface.
4. A low-profile broadband conformal antenna element according to claim 2 or 3, wherein the modified feed patch and the modified feed probe are integrally formed.
5. A low-profile, broadband conformal antenna unit according to any one of claims 1-3, wherein the radome is made of a wave-transparent material.
6. The low-profile broadband conformal antenna element according to claim 1, wherein the feeding structure is a coaxial line feeding structure comprising an inner conductor and an outer conductor coaxially disposed, wherein the inner conductor is connected to the tapered feeding probe and the outer conductor is connected to the rectangular ground.
7. The low-profile broadband conformal antenna unit according to claim 1, wherein the cavity is a rectangular metal cavity, and/or projections of the conformal radiating element and the parasitic radiating element on a bottom surface of the cavity are rectangular.
8. A low-profile broadband conformal antenna array, comprising a plurality of low-profile broadband conformal antenna elements of any one of claims 1-7.
9. The low-profile broadband conformal antenna array according to claim 8, wherein the carriers of the plurality of low-profile broadband conformal antenna elements form a unitary structure.
10. The low-profile broadband conformal antenna array according to claim 9, wherein the antenna array comprises a plurality of unit structures divided into a first group and a second group, wherein the first group comprises the plurality of unit structures, the second group also comprises the plurality of unit structures, the plurality of unit structures of the first group and the plurality of unit structures of the second group are arranged at intervals along the first direction of the integrated structure, and the plurality of unit structures of the first group and the plurality of unit structures of the second group are further arranged on two sides of the integrated structure in an opposite manner and in a one-to-one correspondence manner.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210210103.5A CN114678691B (en) | 2022-03-03 | 2022-03-03 | Low profile broadband conformal antenna element and array |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210210103.5A CN114678691B (en) | 2022-03-03 | 2022-03-03 | Low profile broadband conformal antenna element and array |
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| Publication Number | Publication Date |
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| CN114678691A true CN114678691A (en) | 2022-06-28 |
| CN114678691B CN114678691B (en) | 2024-01-05 |
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| CN202210210103.5A Active CN114678691B (en) | 2022-03-03 | 2022-03-03 | Low profile broadband conformal antenna element and array |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN118281552A (en) * | 2024-04-09 | 2024-07-02 | 北京昊测科技有限公司 | L-band full-airspace coverage wing conformal antenna |
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| CN118281552A (en) * | 2024-04-09 | 2024-07-02 | 北京昊测科技有限公司 | L-band full-airspace coverage wing conformal antenna |
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