CN210468113U - Demetallized conformal dielectric resonator antenna - Google Patents
Demetallized conformal dielectric resonator antenna Download PDFInfo
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- CN210468113U CN210468113U CN201921753265.3U CN201921753265U CN210468113U CN 210468113 U CN210468113 U CN 210468113U CN 201921753265 U CN201921753265 U CN 201921753265U CN 210468113 U CN210468113 U CN 210468113U
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Abstract
The utility model also discloses a demetallized conformal dielectric resonator antenna, which comprises a floor, a dielectric substrate, a dielectric resonator, a feed gap, a feeder line, a feed port and a dielectric loading structure; the floor and the dielectric resonator are in an arc-shaped conformal shape, and the dielectric resonator is fixed on the upper surface of the floor; the upper surface of the dielectric substrate is attached to the floor, and the lower surface of the dielectric substrate is attached to the feeder line; etching a feed gap in the center of the floor; a feed port is arranged at the joint of the floor and the dielectric substrate; the front surface of the dielectric resonator is attached to the rear surface of the dielectric loading structure, and the dielectric resonator and the dielectric loading structure are fixed on the upper surface of the floor; the antenna is fed by a feed line and electromagnetic wave energy is then conducted to the dielectric resonator of the upper surface by coupling through a feed slot in the floor. The utility model has the advantages that: the antenna has a good tuning structure, improves the design freedom degree, realizes flexible control of size and bandwidth, realizes demetalization, reduces the design and application difficulty, and has wider beam width and higher gain.
Description
Technical Field
The utility model relates to a conformal antenna technical field, in particular to demetallized conformal dielectric resonator antenna.
Background
With the rapid development of wireless communication technology, wireless communication devices are beginning to be portable, and various wearable electronic devices are coming, which also makes the antenna design to be conformal.
The conformal antenna is an antenna which keeps the shape consistent with the shape of an object structure and does not bring extra burden to a conformal device, the antenna array surface is made to be conformal with the shape of a carrier, adaptability is enhanced, and the antenna has great advantages compared with a planar array antenna. In a modern wireless communication system, a conformal array antenna can be conformal to the surface of a carrier platform running at a high speed, such as an airplane, a missile, a satellite and the like, and does not damage the characteristics of the appearance structure, the aerodynamics and the like of a carrier, so that the conformal array antenna becomes a research hotspot in the field of antennas and is an important direction for the development of phased array radars in the new century. The flexible conformal array antenna is a more advanced conformal array antenna technology, can conform to any curved surface, can be dynamically adjusted along with the change of the shape, and has better adaptability to the vibration and the change of the shape of an aircraft caused by pneumatics, cold and heat and the like.
The dielectric resonator has the advantages of high radiation efficiency, small self loss, multiple radiation modes, convenience in integration, diversity of resonator shapes and feeding modes and the like, so that the dielectric resonator gradually receives wide attention and research in many fields, but few people in the market apply the advantages of the dielectric resonator antenna to emerging conformal equipment, the design method is not mature, the lack of the tuning theory directly causes the antenna to have low design freedom degree, and the free control of frequency and bandwidth is difficult to realize. The common dielectric resonator antenna is often tuned by using a metal structure according to a mirror image principle and a perturbation method or a coupling theory, and the method introduces the metal structure into the dielectric antenna again, so that certain ohmic loss exists, and the common dielectric resonator antenna is not suitable for high frequency.
With the rapid development of modern communication technology, the wireless communication system has multiple functions on the antenna, the requirements for ultra-bandwidth and large capacity are higher and higher, and the importance of a frequency tuning structure in the antenna system is indirectly improved. A good frequency tuning structure can greatly improve the performance of an antenna system, so that the system has flexible and variable frequency and radiation performance.
SUMMERY OF THE UTILITY MODEL
The utility model discloses to prior art's defect, a remove conformal dielectric resonator antenna of metallization is provided, the problem that can the above-mentioned prior art of effectual solution exist.
In order to realize the purpose of the utility model, the utility model discloses the technical scheme who takes as follows:
a demetallized conformal dielectric resonator antenna, comprising: the device comprises a floor 1, a dielectric substrate 2, a dielectric resonator 3, a feed gap 4, a feed line 5, a feed port 6 and a dielectric loading structure 7;
the floor 1 and the dielectric resonator 3 are in an arc shape and conformal, and the dielectric resonator 3 is fixed in the middle of the upper surface of the floor 1;
the upper surface of the dielectric substrate 2 is attached to the floor 1, and the lower surface is attached to the feeder 5; etching a feed gap 4 in the center of the floor 1; meanwhile, a feed port 6 is arranged at the joint of the floor board 1 and the dielectric substrate 2;
the front surface (relative to the standard yoz coordinate plane) of the dielectric resonator 3 is tightly attached to the back surface (relative to the standard yoz coordinate plane) of the dielectric loading structure 7, and the dielectric resonator 3 and the dielectric loading structure 7 are fixed on the upper surface of the floor 1;
the antenna is fed by a feed line 5 and the electromagnetic wave energy is then coupled through a feed slot 4 in the floor 1 to the dielectric resonator 3 of the upper surface.
Further, the dielectric resonator 3 is made of a ceramic material with a dielectric constant of 9.9, and the dielectric loading structure 7 is made of a ceramic material with a dielectric constant of 92; the width of the dielectric resonator 3 is 10mm, the thickness is 4mm, the arc length of the bottom arc edge is 17.8mm, the arc length of the top arc edge is 22mm, and the radian is 60 degrees.
Further, the width of the medium loading structure 7 is 1mm, the thickness is 4mm, the arc length of the bottom arc edge is 17.8mm, the arc length of the top arc edge is 22mm, and the radian is 60 degrees;
further, the width of the floor 1 is 30mm, the arc length of the arc edge is 36.7mm, and the radian is 90 degrees;
further, the dielectric substrate 2 is made of an epoxy resin material with a dielectric constant of 4.6, the width of the dielectric substrate 2 is 30mm, the height of the dielectric substrate is 0.6mm, the arc length of the arc edge is 34.3mm, and the radian of the arc edge is 90 degrees.
Further, the length of the feed gap 4 is 6mm, the width is 0.6mm, the material of the feed line 5 is epoxy resin, the dielectric constant is 4.6, the length is 21mm, the width is 1.85mm, the distance of the feed line 5 exceeding the center of the feed gap 4 is 2mm, the lower end of the feed port 6 is connected with the feed line 5, the upper end is connected with the floor 1, and the feed port is positioned at the center of the rear surface (relative to a standard yoz coordinate plane) of the dielectric substrate 2;
further, the dielectric resonator 3 is made of a composite ceramic dielectric copper-clad plate material with the dielectric constant of 10, the dielectric loading structure 7 is made of a ceramic loading composite plate material with the dielectric constant of 4, the width of the dielectric resonator 3 is 30mm, the thickness of the dielectric resonator is 10mm, the arc length of the bottom arc edge is 52.3mm, and the arc length of the top arc edge is 62.8 mm. The width of the medium loading structure 7 is 10mm, the thickness is 10mm, the arc length of the bottom arc edge is 52.3mm, the arc length of the top arc edge is 62.8mm, and the radian is 60 degrees; the width of the floor 1 is 70mm, the arc length of the arc edge is 104.7mm, the dielectric substrate 2 is made of a composite ceramic dielectric copper-clad plate material with the dielectric constant of 2.2, the width of the dielectric substrate 2 is 70mm, the height of the dielectric substrate is 0.6mm, and the arc length of the arc edge is 104.7 mm;
further, the length of the feed seam 4 is 22mm, the width of the feed seam is 2mm, the material of the feed line 5 is a composite ceramic dielectric copper-clad plate, the dielectric constant is 2.2, the length of the feed seam is 48mm, the width of the feed seam is 1.5mm, and the distance between the feed line 5 and the feed seam center 4 is 15 mm.
Further, the utility model discloses an antenna adopts the side feed.
Compared with the prior art, the utility model has the advantages of:
1. the tuning structure is good, and miniaturization, frequency shifting and the like can be realized;
2. by utilizing medium loading, the design freedom degree is obviously improved, the flexible control of the size and the bandwidth can be realized, and the tunable frequency and the tunable bandwidth of the design are reflected;
3. the full-dielectric antenna is realized, but the performance of the metal loading type dielectric resonator antenna can be achieved, and the demetallization is realized through the whole design;
4. the antenna is of a low-profile conformal structure as a whole, lateral feeding is adopted, a slot is formed in the middle of the floor, the feeding effect is achieved through a slot coupling feeding theory, the floor is conformal with the convex antenna, the antenna can be applied to a curved surface, and the antenna is suitable for wearable equipment; the overall structure is simple, mature theoretical solution and design methods are provided, and the design and application difficulty is greatly reduced. By changing the planar antenna into a convex shape, the beam width of the antenna is increased; the antenna is designed based on the dielectric resonator antenna, has wider beam width and higher gain compared with the traditional microstrip patch antenna and other conformal dielectric resonator antennas, and has no obvious performance deterioration compared with a metal patch antenna. Easy to understand and strong in portability.
Drawings
Fig. 1 is a front view of a demetallized conformal miniaturized dielectric resonator antenna of an embodiment of the present invention;
fig. 2 is a top view of a demetallized conformal miniaturized dielectric resonator antenna of an embodiment of the present invention;
fig. 3 is a bottom view of a demetallized conformal miniaturized dielectric resonator antenna of an embodiment of the present invention;
fig. 4 is a graph comparing S-parameter curves for a demetallized conformal miniaturized dielectric resonator antenna and a conventional dielectric resonator antenna port of an embodiment of the present invention;
fig. 5 is an internal field pattern of a demetallized conformal miniaturized dielectric resonator antenna of an embodiment of the present invention;
fig. 6 is a front view of a demetallized conformal wideband dielectric resonator antenna of an embodiment of the present invention;
fig. 7 is a bottom view of a demetallized conformal wideband dielectric resonator antenna of an embodiment of the present invention;
fig. 8 is a graphical illustration of a demetallized conformal wideband dielectric resonator antenna port S11 parameter curve according to an embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more clearly understood, the present invention will be further described in detail with reference to the accompanying drawings.
Example 1
As shown in fig. 1-3, a demetallized conformal dielectric resonator antenna, comprising: the device comprises a floor 1, a dielectric substrate 2, a dielectric resonator 3, a feed gap 4, a feed line 5, a feed port 6 and a dielectric loading structure 7;
the floor 1 and the dielectric resonator 3 are in an arc shape and conformal, and the dielectric resonator 3 is fixed in the middle of the upper surface of the floor 1;
the upper surface of the dielectric substrate 2 is attached to the floor 1, and the lower surface is attached to the feeder 5; etching a feed gap 4 in the center of the floor 1; meanwhile, a feed port 6 is arranged at the joint of the floor board 1 and the dielectric substrate 2;
the front surface (relative to the standard yoz coordinate plane) of the dielectric resonator 3 is tightly attached to the back surface (relative to the standard yoz coordinate plane) of the dielectric loading structure 7, and the dielectric resonator 3 and the dielectric loading structure 7 are fixed on the upper surface of the floor 1;
the antenna is fed by a feed line 5 and the electromagnetic wave energy is then coupled through a feed slot 4 in the floor 1 to the dielectric resonator 3 of the upper surface.
The dielectric resonator 3 is made of a ceramic material with a dielectric constant of 9.9, and the dielectric loading structure 7 is made of a ceramic material with a dielectric constant of 92; the width of the dielectric resonator 3 is 10mm, the thickness is 4mm, the arc length of the bottom arc edge is 17.8mm, the arc length of the top arc edge is 22mm, and the radian is 60 degrees.
The width of the medium loading structure 7 is 1mm, the thickness is 4mm, the arc length of the bottom arc edge is 17.8mm, the arc length of the top arc edge is 22mm, and the radian is 60 degrees;
the width of the floor 1 is 30mm, the arc length of the arc edge is 36.7mm, and the radian is 90 degrees;
the dielectric substrate 2 is made of epoxy resin material with the dielectric constant of 4.6, the width of the dielectric substrate 2 is 30mm, the height of the dielectric substrate is 0.6mm, the arc length of the arc edge is 34.3mm, and the radian of the arc edge is 90 degrees.
The length of the feed gap 4 is 6mm, the width of the feed gap is 0.6mm, the material of the feed line 5 is epoxy resin, the dielectric constant is 4.6, the length of the feed gap is 21mm, the width of the feed gap is 1.85mm, the distance of the feed line 5 exceeding the center 4 of the feed gap is 2mm, the lower end of the feed port 6 is connected with the feed line 5, the upper end of the feed port is connected with the floor 1, and the feed port is positioned at the central position of the rear surface (relative to a standard yoz coordinate plane;
the utility model discloses an antenna adopts the side direction feed. This is done to reduce the amount of space occupied by the antenna in the vertical direction.
Compared with the traditional microstrip antenna and other conformal dielectric resonator antennas, the antenna has wider wave beams and higher gain based on the design of the dielectric resonator antenna, and simultaneously achieves the functions of metal loading and the functions above the metal loading by utilizing dielectric loading, so that the antenna has no metal loss and improves the antenna efficiency.
The red line is the S parameter curve designed at this time, and it can be seen that the center resonant frequency of the curve designed at this time is 6.5GHz, and the bandwidth is 0.84GHz, while the resonant frequency of the conventional dielectric antenna is 7.3GHz and 9.3GHz, and the bandwidth is 0.94GHz and 0.84GHz, respectively. The curve comparison in the figure shows that the design has small return loss, so that the antenna achieves good matching characteristic in the working frequency band.
As shown in FIG. 8, the central resonant frequency of the curve is 2.79GHz, and the relative bandwidth is 39.4%, which is greatly better than that of the single-medium convex conformal dielectric resonator antenna.
Example 2, this example illustrates only the differences from example 1;
as shown in fig. 6 and 7, the dielectric resonator 3 is made of a composite ceramic dielectric copper clad laminate material with a dielectric constant of 10, the dielectric loading structure 7 is made of a ceramic loading composite board material with a dielectric constant of 4, the width of the dielectric resonator 3 is 30mm, the thickness of the dielectric resonator is 10mm, the arc length of the bottom arc edge is 52.3mm, and the arc length of the top arc edge is 62.8 mm. The width of the medium loading structure 7 is 10mm, the thickness is 10mm, the arc length of the bottom arc edge is 52.3mm, the arc length of the top arc edge is 62.8mm, and the radian is 60 degrees; the width of the floor 1 is 70mm, the arc length of the arc edge is 104.7mm, the dielectric substrate 2 is made of a composite ceramic dielectric copper-clad plate material with the dielectric constant of 2.2, the width of the dielectric substrate 2 is 70mm, the height of the dielectric substrate is 0.6mm, and the arc length of the arc edge is 104.7 mm;
the length of the feed seam 4 is 22mm, the width is 2mm, the material of the feed line 5 is a composite ceramic dielectric copper-clad plate, the dielectric constant is 2.2, the length is 48mm, the width is 1.5mm, and the distance of the feed line 5 exceeding the feed seam center 4 is 15 mm.
It will be appreciated by those of ordinary skill in the art that the examples described herein are intended to assist the reader in understanding the manner of practicing the invention, and it is to be understood that the scope of the invention is not limited to such specific statements and examples. Those skilled in the art can make various other specific modifications and combinations based on the teachings of the present invention without departing from the spirit of the invention, and such modifications and combinations are still within the scope of the invention.
Claims (9)
1. A demetallized conformal dielectric resonator antenna, comprising: the device comprises a floor (1), a dielectric substrate (2), a dielectric resonator (3), a feed gap (4), a feed line (5), a feed port (6) and a dielectric loading structure (7);
the floor (1) and the dielectric resonator (3) are in an arc-shaped conformal shape, and the dielectric resonator (3) is fixed in the middle of the upper surface of the floor (1);
the upper surface of the dielectric substrate (2) is attached to the floor (1), and the lower surface is attached to the feeder (5); etching a feed gap (4) in the center of the floor (1); meanwhile, a feed port (6) is arranged at the joint of the floor (1) and the dielectric substrate (2);
the front surface of the dielectric resonator (3) is attached to the rear surface of the dielectric loading structure (7), and the dielectric resonator (3) and the dielectric loading structure (7) are fixed on the upper surface of the floor (1);
the antenna is fed by a feeder (5), and then electromagnetic wave energy is coupled and conducted to the dielectric resonator (3) on the upper surface through a feed slit (4) on the floor (1).
2. A demetallized conformal dielectric resonator antenna as recited in claim 1, wherein: the dielectric resonator (3) is made of a ceramic material with a dielectric constant of 9.9, and the dielectric loading structure (7) is made of a ceramic material with a dielectric constant of 92; the width of the dielectric resonator (3) is 10mm, the thickness is 4mm, the arc length of the bottom arc edge is 17.8mm, the arc length of the top arc edge is 22mm, and the radian is 60 degrees.
3. A demetallized conformal dielectric resonator antenna as recited in claim 2, wherein: the width of the medium loading structure (7) is 1mm, the thickness is 4mm, the arc length of the bottom arc edge is 17.8mm, the arc length of the top arc edge is 22mm, and the radian is 60 degrees.
4. A demetallized conformal dielectric resonator antenna as claimed in claim 3, wherein: the width of the floor (1) is 30mm, the arc length of the arc edge is 36.7mm, and the radian is 90 degrees.
5. The demetallized conformal dielectric resonator antenna of claim 4, wherein: the dielectric substrate (2) is made of epoxy resin material with the dielectric constant of 4.6, the width of the dielectric substrate (2) is 30mm, the height of the dielectric substrate is 0.6mm, the arc length of the arc edge is 34.3mm, and the radian of the arc edge is 90 degrees.
6. A demetallized conformal dielectric resonator antenna as recited in claim 5, wherein: the length of the feed gap (4) is 6mm, the width of the feed gap is 0.6mm, the material of the feed line (5) is epoxy resin, the dielectric constant is 4.6, the length of the feed gap is 21mm, the width of the feed gap is 1.85mm, the distance of the feed line (5) exceeding the center of the feed gap (4) is 2mm, the lower end of the feed port (6) is connected with the feed line (5), the upper end of the feed port is connected with the floor (1), and the feed port is positioned in the center of the rear surface of the dielectric substrate.
7. A demetallized conformal dielectric resonator antenna as recited in claim 1, wherein: the dielectric resonator (3) is made of a composite ceramic dielectric copper-clad plate material with the dielectric constant of 10, the dielectric loading structure (7) is made of a ceramic loading composite plate material with the dielectric constant of 4, the width of the dielectric resonator (3) is 30mm, the thickness of the dielectric resonator is 10mm, the arc length of a bottom arc edge is 52.3mm, and the arc length of a top arc edge is 62.8 mm; the width of the medium loading structure (7) is 10mm, the thickness is 10mm, the arc length of the bottom arc edge is 52.3mm, the arc length of the top arc edge is 62.8mm, and the radian is 60 degrees; the width of the floor (1) is 70mm, the arc length of the arc edge is 104.7mm, the dielectric substrate (2) is made of a composite ceramic dielectric copper-clad plate material with the dielectric constant of 2.2, the width of the dielectric substrate (2) is 70mm, the height of the dielectric substrate is 0.6mm, and the arc length of the arc edge is 104.7 mm.
8. A demetallized conformal dielectric resonator antenna as recited in claim 7, wherein: the length of the feed seam (4) is 22mm, the width is 2mm, the material of the feed line (5) is a composite ceramic dielectric copper-clad plate, the dielectric constant is 2.2, the length is 48mm, the width is 1.5mm, and the distance between the feed line (5) and the center of the feed seam (4) is 15 mm.
9. A demetallized conformal dielectric resonator antenna as claimed in any one of claims 1 to 8, wherein: the antenna employs side feed.
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| CN110635236A (en) * | 2019-10-18 | 2019-12-31 | 成都北斗天线工程技术有限公司 | Demetallized conformal dielectric resonator antenna |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110635236A (en) * | 2019-10-18 | 2019-12-31 | 成都北斗天线工程技术有限公司 | Demetallized conformal dielectric resonator antenna |
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