CN111541039A - One-eighth spherical shell-shaped dielectric resonator antenna - Google Patents
One-eighth spherical shell-shaped dielectric resonator antenna Download PDFInfo
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- CN111541039A CN111541039A CN202010412054.4A CN202010412054A CN111541039A CN 111541039 A CN111541039 A CN 111541039A CN 202010412054 A CN202010412054 A CN 202010412054A CN 111541039 A CN111541039 A CN 111541039A
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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
- H01Q9/0485—Dielectric resonator antennas
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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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Abstract
The invention discloses an eighth spherical shell-shaped dielectric resonator antenna, which comprises a dielectric substrate, a first radiating unit, a second radiating unit, a first microstrip feeder line, a first dielectric patch, a second dielectric patch, a ground plane and a second microstrip feeder line, wherein the first radiating unit is arranged on the dielectric substrate; the upper surface of the medium substrate is printed with a first microstrip feeder line and a second microstrip feeder line; one end of the first microstrip feeder line is connected with the bottom edge of the dielectric substrate, and the other end of the first microstrip feeder line is connected with the center of the second microstrip feeder line; the top parts of the first radiation unit and the second radiation unit are connected, the bottom parts of the first radiation unit and the second radiation unit are placed on the upper surface of the medium substrate, and the first radiation unit and the second radiation unit are symmetrically arranged; the central axis of the inner surfaces of the first radiation unit and the second radiation unit is respectively stuck with a second medium patch; and two ends of the second microstrip feeder line are respectively connected with the end parts of the first dielectric patch and the second dielectric patch. The antenna adopts two one-eighth spherical shell-shaped radiating units, the placing mode is random, and the radiation direction of the antenna can be adjusted through different placing modes.
Description
Technical Field
The invention relates to the field of communication, in particular to an eighth spherical shell-shaped dielectric resonator antenna.
Background
In recent years, wireless communication applications are becoming more and more widespread, and terminal devices also show a diversified trend. As an important component of transmitting and receiving signals in a wireless communication system, the antenna has increasingly high requirements for various performance indexes such as efficiency, gain, directivity, bandwidth and the like, and material and portability thereof, so as to be capable of adapting to different environments.
Since there is no surface wave loss in the DRA (dielectric resonator antenna), the DRA can maintain high radiation efficiency at both low and high frequencies when the loss tangent angle is sufficiently small. At the same time, DRAs have many distinct advantages over other antennas:
(1) structurally, DRA belongs to a three-dimensional structure, and the dielectric resonator is flexible in shape design and typically has shapes of a rectangle, a cylinder, a circular truncated cone and the like.
(2) In order to meet certain specific requirements, the dielectric constant can be flexibly adjusted, and the size and the shape of the dielectric resonator antenna can be adjusted to finally obtain the dielectric resonator antenna meeting the requirements.
(3) The DRA has various feeding modes, such as microstrip direct feeding, coaxial probe feeding, coplanar waveguide feeding, slot coupling feeding and the like.
(4) The DRA has no metal surface, the surface wave loss is extremely low, the rest surfaces are radiation surfaces except a ground surface with a reflecting plate, and the radiation efficiency is extremely high.
(5) The DRA is relatively small in size, relatively light in weight, convenient to process and easy for integration of other planar circuits.
Thus, DRAs find application in many communication systems and devices.
The 5G technology is more mature now, and it is necessary to design a dielectric resonator antenna which can be applied to a 5G system.
Disclosure of Invention
Aiming at the defects of the prior art, the invention aims to solve the technical problem of providing an eighth spherical shell-shaped dielectric resonator antenna.
The technical scheme for solving the technical problem is to provide an eighth spherical shell-shaped dielectric resonator antenna which is characterized by comprising a dielectric substrate, a first radiating unit, a second radiating unit, a first microstrip feeder line, a first dielectric patch, a second dielectric patch, a ground plane and a second microstrip feeder line;
a first microstrip feeder line and a second microstrip feeder line are printed on the upper surface of the medium substrate; one end of the first microstrip feeder line is connected with the bottom edge of the dielectric substrate, and the other end of the first microstrip feeder line is connected to the central position of the second microstrip feeder line; an included angle between the first microstrip feed line and the second microstrip feed line is theta; the top parts of the first radiation unit and the second radiation unit are connected, the bottom parts of the first radiation unit and the second radiation unit are placed on the upper surface of the medium substrate, and the first radiation unit and the second radiation unit are symmetrically arranged; a first medium patch is attached to the central axis of the inner surface of the first radiation unit, and the tail end of the first medium patch is in contact with the upper surface of the medium substrate; a second medium patch is attached to the central axis of the inner surface of the second radiation unit, and the tail end of the second medium patch is in contact with the upper surface of the medium substrate; two ends of the second microstrip feeder line are respectively connected with the end parts of the first dielectric patch and the second dielectric patch; the ground plane is printed on the lower surface of the dielectric substrate.
Compared with the prior art, the invention has the beneficial effects that:
1. the invention adopts two one-eighth spherical shell-shaped radiating units, the placing positions of the radiating units are only symmetrically placed and are positioned on the same straight line, the corresponding spherical centers of the radiating units are positioned at the center of the dielectric substrate, and the angle between the straight line and the oy direction can be randomly placed between 30 degrees and 90 degrees, thereby increasing the flexibility of the antenna.
2. The radiation unit is spherical shell shaped and has very thin thickness. Compared with a spherical radiating unit, the antenna greatly saves medium materials, saves cost and reduces the volume of the antenna.
3. By adding the same radiation unit, the working bandwidth of the antenna is greatly increased, and the working bandwidth meets two frequency bands of 5G.
4. The radiation direction of the antenna can be controlled by adjusting the placing mode of the antenna radiation unit. The energy of the antenna is radiated from the gap between the two spherical shells.
5. The working bandwidth of the antenna is wide, so that the frequency band offset generated by processing errors can be tolerated to a certain extent, the integrity of signals is ensured, and the performance is stable.
6. The antenna has simple structure, stable performance and adjustable radiation mode.
Drawings
FIG. 1 is a perspective view of the overall structure of the present invention;
FIG. 2 is a graph of antenna reflection coefficient simulations for different values of θ in accordance with the present invention;
fig. 3 is an antenna horizontal plane radiation pattern (θ ═ 30 °) of embodiment 1 of the present invention;
fig. 4 is an antenna vertical plane radiation pattern (θ ═ 30 °) of embodiment 1 of the present invention;
fig. 5 is an antenna horizontal plane radiation pattern (θ ═ 60 °) of embodiment 2 of the present invention;
fig. 6 is an antenna vertical plane radiation pattern (θ ═ 60 °) of embodiment 2 of the present invention;
fig. 7 is an antenna horizontal plane radiation pattern (θ ═ 90 °) of embodiment 3 of the present invention;
fig. 8 is an antenna vertical plane radiation pattern (θ ═ 90 °) according to embodiment 3 of the present invention.
In the figure: 1. a dielectric substrate; 2. a first radiation unit; 3. a second radiation unit; 4. a first microstrip feed line; 5. a first dielectric patch; 6. a second dielectric patch; 7. a ground plane; 8. a second microstrip feed line.
Detailed Description
Specific examples of the present invention are given below. The specific examples are only intended to illustrate the invention in further detail and do not limit the scope of protection of the claims of the present application.
The invention provides an eighth spherical shell-shaped dielectric resonator antenna (see figure 1, the antenna is short for) which is characterized by comprising a dielectric substrate 1, a first radiating element 2, a second radiating element 3, a first microstrip feeder 4, a first dielectric patch 5, a second dielectric patch 6, a ground plane 7 and a second microstrip feeder 8;
a first microstrip feeder line 4 and a second microstrip feeder line 8 are printed on the upper surface of the dielectric substrate 1; one end of the first microstrip feeder line 4 is connected with the bottom edge of the dielectric substrate 1 along the oy direction, a radio frequency signal is fed from the end, and the other end is connected to the central position of the second microstrip feeder line 8; an included angle between the first microstrip feed line 4 and the second microstrip feed line 8 is theta; the top parts of the first radiation unit 2 and the second radiation unit 3 are connected, the bottom parts of the first radiation unit and the second radiation unit are placed on the upper surface of the medium substrate 1, and the first radiation unit and the second radiation unit are symmetrically arranged; a bent first dielectric patch 5 is attached to the central axis of the inner surface of the first radiation unit 2, and the tail end of the first dielectric patch 5 is in contact with the upper surface of the dielectric substrate 1; a bent second dielectric patch 6 is pasted on the central axis of the inner surface of the second radiation unit 3, and the tail end of the second dielectric patch 6 is in contact with the upper surface of the dielectric substrate 1; two ends of the second microstrip feeder line 8 are respectively connected with the ends of the first dielectric patch 5 and the second dielectric patch 6; the ground plane 7 is printed on the lower surface of the dielectric substrate 1.
The first radiation unit 2 and the second radiation unit 3 both adopt an eighth spherical shell structure, and the sizes and the shapes of the first radiation unit and the second radiation unit are completely the same; the top ends of the two spherical shell structures are connected, and the plane of the bottom is placed on the upper surface of the medium substrate 1.
The central axis of the first microstrip feeder line 4 is collinear with the central axis of the dielectric substrate 1.
The central axis of the first dielectric patch 5, the central axis of the second dielectric patch 6 and the central axis of the second microstrip feeder line 8 are coplanar.
The spherical centers of the two spherical shell structures are superposed with the center of the upper surface of the medium substrate 1.
The center of the dielectric substrate 1, the center of the second microstrip feeder line 8 and the connecting point of the tops of the first radiating element 2 and the second radiating element 3 are collinear at three points, and the straight line is perpendicular to the dielectric substrate 1.
The length and width of the ground plane 7 are the same as those of the dielectric substrate 1. The value of theta ranges from 30 degrees to 90 degrees.
The dielectric substrate 1 adopts a glass fiber epoxy resin copper clad laminate (FR-4) with the relative dielectric constant of 4.4.
The first radiation unit 2 and the second radiation unit 3 each employ Rogers RO4003 having a relative dielectric constant of 3.55.
For better connection with the first dielectric patch 5 and the second dielectric patch 6, the two ends of the second microstrip feed line 8 may be designed to be arcs, the arcs of which are consistent with the arcs of the inner surfaces of the first radiating element 2 and the second radiating element 3.
Example 1
The size of the dielectric substrate 1 of the embodiment is 66mm × 66mm × 0.8mm, and a glass fiber epoxy resin copper clad laminate (FR-4) with a relative dielectric constant of 4.4 is adopted.
The first radiating element 2 and the second radiating element 3 are in the shape of one-eighth of a spherical shell structure, the outer diameter is 17.5mm, the inner diameter is 16.5mm, the thickness is 1mm, and the material is Rogers RO 4003.
The length and width of the first dielectric patch 5 and the second dielectric patch 6 are both 15.8mm × 3.3 mm.
In the present embodiment, the angle θ between the first microstrip feed line 4 and the second microstrip feed line 8 is 30 °. The length and width of the first microstrip feed line 4 is 33mm × 1.5 mm. The second microstrip feeder line 8 is designed into a right trapezoid, the upper bottom is 30.2mm, the lower bottom is 32.8mm, and the height is 1.5 mm.
The length and width of the ground plane 7 are the same as those of the dielectric substrate 1.
In operation, a radio frequency signal is fed from the bottom end of the first microstrip feed line 4 and transferred to the first dielectric patch 5 and the second dielectric patch 6, thereby exciting a resonant mode of the first radiating element 2 and the second radiating element 3.
As can be seen from fig. 3 and 4, the maximum radiation directions of the antenna in embodiment 1 are 120 ° and-60 ° which are different from θ by 90 °, and the energy of the antenna is mostly radiated from the gap between the two radiation units.
Example 2
This example is the same as example 1 except that: the included angle between the first microstrip feed line 4 and the second microstrip feed line 8 is different, and the placing positions of the corresponding first radiating element 2 and the corresponding second radiating element 3 are correspondingly changed. In the present embodiment, the angle θ between the first microstrip feed line 4 and the second microstrip feed line 8 is 60 °. The length and width of the first microstrip feed line 4 is 33mm × 1.5 mm. The second microstrip feeder line 8 is designed into a right trapezoid, the upper bottom is 31.7mm, the lower bottom is 32.6mm, and the height is 1.5 mm.
As can be seen from fig. 5 and 6, the maximum radiation directions of the antenna in embodiment 2 are 150 ° and-30 °, which are different from θ by 90 °, and the energy of the antenna is mostly radiated from the gap between the two radiation units.
Example 3
This example is the same as example 1 except that: the included angle between the first microstrip feed line 4 and the second microstrip feed line 8 is different, and the placing positions of the corresponding first radiating element 2 and the corresponding second radiating element 3 are correspondingly changed. In the present embodiment, the angle θ between the first microstrip feed line 4 and the second microstrip feed line 8 is equal to 90 °. The length and width of the first microstrip feed line 4 is 33mm × 1.5 mm. The second microstrip feed line 8 is rectangular, 32.25mm long and 1.5mm wide.
As can be seen from fig. 7 and 8, the maximum radiation directions of the antenna in embodiment 3 are 180 ° and 0 °, which are different from θ by 90 °, and the energy of the antenna is mostly radiated from the gap between the two radiation units.
As can be seen from FIG. 2, when θ is 30 °, 60 ° and 90 °, the operating band of the antenna can always satisfy the antenna bandwidth (3.3-3.6GHz, 4.8-5.0GHz) of the 5G system.
As can be seen from fig. 3-8, as the placing angles of the two radiation units are changed, the radiation direction is also changed.
From the symmetry of the antenna structure, when-30 ° > θ > -90 °, the reflection coefficient of the antenna is the same as that of 30 ° < θ <90 °, and the radiation direction is symmetrical about the yoz plane.
Antenna results for other values of theta can be modeled from the data here.
Nothing in this specification is said to apply to the prior art.
Claims (10)
1. An eighth spherical shell-shaped dielectric resonator antenna is characterized by comprising a dielectric substrate, a first radiating element, a second radiating element, a first microstrip feeder line, a first dielectric patch, a second dielectric patch, a ground plane and a second microstrip feeder line;
a first microstrip feeder line and a second microstrip feeder line are printed on the upper surface of the medium substrate; one end of the first microstrip feeder line is connected with the bottom edge of the dielectric substrate, and the other end of the first microstrip feeder line is connected to the central position of the second microstrip feeder line; an included angle between the first microstrip feed line and the second microstrip feed line is theta; the top parts of the first radiation unit and the second radiation unit are connected, the bottom parts of the first radiation unit and the second radiation unit are placed on the upper surface of the medium substrate, and the first radiation unit and the second radiation unit are symmetrically arranged; a first medium patch is attached to the central axis of the inner surface of the first radiation unit, and the tail end of the first medium patch is in contact with the upper surface of the medium substrate; a second medium patch is attached to the central axis of the inner surface of the second radiation unit, and the tail end of the second medium patch is in contact with the upper surface of the medium substrate; two ends of the second microstrip feeder line are respectively connected with the end parts of the first dielectric patch and the second dielectric patch; the ground plane is printed on the lower surface of the dielectric substrate.
2. An eighth spherical shell shaped dielectric resonator antenna according to claim 1, wherein the first radiating element and the second radiating element are of an eighth spherical shell shaped structure, and the size and shape of the first radiating element and the second radiating element are the same; the top ends of the two spherical shell structures are connected, and the plane of the bottom is placed on the upper surface of the medium substrate.
3. An eighth-spherical-shell-shaped dielectric resonator antenna according to claim 1 or 2, wherein the central axis of the first microstrip feed line is collinear with the central axis of the dielectric substrate.
4. An eighth-shell dielectric resonator antenna according to claim 3, wherein the first radiating element and the second radiating element are located at centers of spheres coinciding with a center of the upper surface of the dielectric substrate.
5. The one-eighth spherical shell dielectric resonator antenna according to claim 4, wherein the central axis of the first dielectric patch, the central axis of the second dielectric patch and the central axis of the second microstrip feed line are coplanar.
6. An eighth-shell dielectric resonator antenna according to claim 1, wherein the ground plane has a length and a width equal to those of the dielectric substrate.
7. An eighth-spherical-shell-shaped dielectric resonator antenna according to claim 1, characterized in that θ is in the range of 30 ° -90 °.
8. An eighth-spherical-shell-shaped dielectric resonator antenna according to claim 1, wherein the first radiating element and the second radiating element each employ a Rogers RO4003 having a relative dielectric constant of 3.55.
9. The one-eighth spherical shell-shaped dielectric resonator antenna according to claim 1, wherein the dielectric substrate is a glass fiber epoxy resin copper-clad plate with a relative dielectric constant of 4.4.
10. An eighth-spherical-shell-shaped dielectric resonator antenna according to claim 1, wherein both ends of the second microstrip feed line are formed into an arc having a curvature corresponding to the curvature of the inner surfaces of the first and second radiating elements.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010412054.4A CN111541039B (en) | 2020-05-15 | 2020-05-15 | One-eighth spherical shell-shaped dielectric resonator antenna |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010412054.4A CN111541039B (en) | 2020-05-15 | 2020-05-15 | One-eighth spherical shell-shaped dielectric resonator antenna |
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| CN111541039A true CN111541039A (en) | 2020-08-14 |
| CN111541039B CN111541039B (en) | 2022-04-01 |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20040155817A1 (en) * | 2001-01-22 | 2004-08-12 | Kingsley Simon Philip | Dielectric resonator antenna with mutually orthogonal feeds |
| CN103531908A (en) * | 2013-10-30 | 2014-01-22 | 电子科技大学 | Multiband plane printed antenna |
| CN209232942U (en) * | 2019-01-28 | 2019-08-09 | 河北工业大学 | A kind of ring-like broadband dual-band antenna of rectangle |
| CN209461638U (en) * | 2019-04-16 | 2019-10-01 | 河北工业大学 | A kind of broadband double frequency 5G antenna of feed microstrip line |
-
2020
- 2020-05-15 CN CN202010412054.4A patent/CN111541039B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20040155817A1 (en) * | 2001-01-22 | 2004-08-12 | Kingsley Simon Philip | Dielectric resonator antenna with mutually orthogonal feeds |
| CN103531908A (en) * | 2013-10-30 | 2014-01-22 | 电子科技大学 | Multiband plane printed antenna |
| CN209232942U (en) * | 2019-01-28 | 2019-08-09 | 河北工业大学 | A kind of ring-like broadband dual-band antenna of rectangle |
| CN209461638U (en) * | 2019-04-16 | 2019-10-01 | 河北工业大学 | A kind of broadband double frequency 5G antenna of feed microstrip line |
Non-Patent Citations (1)
| Title |
|---|
| ZHIWEI SONG等: "Design of One-Eighth Spherical Dielectric Resonator Antenna for 5G Applications", 《IEEE》 * |
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| CN111541039B (en) | 2022-04-01 |
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