CN219892405U - Microstrip antenna with novel strip line feed - Google Patents
Microstrip antenna with novel strip line feed Download PDFInfo
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- CN219892405U CN219892405U CN202320498133.0U CN202320498133U CN219892405U CN 219892405 U CN219892405 U CN 219892405U CN 202320498133 U CN202320498133 U CN 202320498133U CN 219892405 U CN219892405 U CN 219892405U
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- 230000005855 radiation Effects 0.000 claims abstract description 73
- 230000005540 biological transmission Effects 0.000 claims abstract description 41
- 238000004891 communication Methods 0.000 claims abstract description 15
- 239000000758 substrate Substances 0.000 claims description 48
- 230000009466 transformation Effects 0.000 claims description 11
- 239000000463 material Substances 0.000 claims description 2
- 230000010354 integration Effects 0.000 abstract description 3
- 238000010586 diagram Methods 0.000 description 3
- 230000010287 polarization Effects 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000005284 excitation Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 238000004088 simulation Methods 0.000 description 1
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Abstract
The utility model discloses a novel microstrip antenna with strip line feed, which belongs to the technical field of satellite communication antennas, and comprises a first radiation sheet, a second radiation sheet, a first grounding sheet, a strip transmission line and a second grounding sheet from top to bottom in sequence, wherein a first dielectric layer is filled between the first radiation sheet and the second radiation sheet, a second dielectric layer is filled between the second radiation sheet and the first grounding sheet, a third dielectric layer is filled between the second grounding sheet and the strip transmission line, and a fourth dielectric layer is filled between the strip transmission line and the second grounding sheet; the strip transmission line excites the first radiation piece and the second radiation piece which are stacked through the notch on the first grounding piece to generate two adjacent resonance points, the frequency band width of the microstrip antenna is expanded, and the gain of the antenna is improved; the strip transmission line is sealed between the first grounding piece and the second grounding piece, so that the anti-interference capability of the microstrip antenna is enhanced, and an additional cavity space is not needed, so that the section of the antenna is reduced, and the integration level of the antenna is improved.
Description
Technical Field
The utility model belongs to the technical field of satellite communication antennas, and particularly relates to a novel strip line feed microstrip antenna.
Background
Along with the development of satellite communication technology, more and more planar microstrip antennas are applied to the field of satellite communication, and compared with the traditional parabolic reflector antenna, the planar microstrip antenna has the characteristics of lower profile, convenience in storage and carrying and the like. In particular, the phase control array formed by the planar microstrip antenna has wide application in the scenes of 'communication in motion', low-orbit satellite chains and the like.
At present, the multi-purpose microstrip line feed of the flat microstrip antenna for satellite communication is limited by the semi-open structure of the microstrip line, a certain cavity space needs to be reserved, and external interference or interference to external equipment is easy to occur.
Disclosure of Invention
The utility model aims to provide a novel microstrip antenna with strip line feed, and aims to solve the technical problems that a microstrip antenna in the prior art needs to reserve a cavity space and is easy to interfere with external equipment or external equipment.
In order to solve the technical problems, the utility model adopts the following technical scheme:
the microstrip antenna is of a layered structure, and comprises a first radiation sheet, a second radiation sheet, a first grounding sheet, a strip transmission line and a second grounding sheet from top to bottom in sequence, wherein a first dielectric layer is filled between the first radiation sheet and the second radiation sheet; a second dielectric layer is filled between the second radiation piece and the first grounding piece; a third dielectric layer is filled between the first grounding plate and the strip transmission line; a fourth dielectric layer is filled between the strip transmission line and the second grounding piece; the strip transmission line excites the first radiation piece and the second radiation piece which are stacked through the notch on the first grounding piece to generate two adjacent resonance points.
Preferably, the first dielectric layer between the first radiation sheet and the second radiation sheet is a first dielectric substrate; the second dielectric layer between the second radiation sheet and the first grounding sheet is a second dielectric substrate; the third dielectric layer between the first grounding plate and the strip transmission line is a third dielectric substrate, and the fourth dielectric layer between the strip transmission line and the second grounding plate is a fourth dielectric substrate; the grounding posts are arranged around the strip transmission line.
Preferably, the microstrip antenna has a five-layer printed substrate structure, and the first radiation sheet, the second radiation sheet, the first grounding sheet, the strip transmission line and the second grounding sheet are correspondingly printed on the first dielectric substrate, the second dielectric substrate, the third dielectric substrate and the fourth dielectric substrate.
Preferably, the strip transmission line comprises a strip feed line and an impedance transformation node; the impedance transformation node is rectangular, and the strip feeder is rectangular long strip.
Preferably, a circular notch is arranged in the middle of the first grounding piece and is used for the feeding of the strip-shaped transmission line to excite the first radiation piece and the second radiation piece to generate two adjacent resonance points.
Preferably, the first radiation sheet and the second radiation sheet are both in a trapezoid structure, and are correspondingly stacked up and down.
Preferably, the materials of the first dielectric substrate, the second dielectric substrate, the third dielectric substrate and the fourth dielectric substrate are RT5880.
Preferably, the microstrip antenna has the following dimensions: length l=8 mm, width w=8 mm, height h=3.37 mm; the thickness of the first dielectric substrate between the first radiation piece and the second radiation piece is 2.08mm.
Preferably, the strip feed line is a 50 ohm strip line, and the size is: 0.5mm wide, 5.5mm long and 0.762mm thick; the size of the impedance transformation node is as follows: 1.2mm wide and 3.7mm long; the radius of the middle circular notch of the first grounding piece is 2.5mm.
Preferably, the microstrip antenna is divided into a transmitting antenna and a receiving antenna, wherein the transmitting antenna can cover a Ku frequency band 13.75 GHz-14.5 GHz of satellite communication, and the receiving antenna can cover a satellite communication frequency band 12.25 GHz-12.75 GHz.
The beneficial effects of adopting above-mentioned technical scheme to produce lie in: compared with the prior art, the flat microstrip antenna as a novel strip line feed expands the frequency bandwidth of the antenna and improves the gain of the antenna by adopting a laminated trapezoidal radiation sheet structure; the microstrip antenna adopts the strip transmission line feed structure, and the anti-interference capability of the microstrip antenna is enhanced by utilizing the characteristic that the strip transmission line is sealed between the first grounding plate and the second grounding plate, and no extra cavity space is needed, so that the section of the antenna is reduced, and the integration level of the antenna is improved.
Drawings
The utility model will be described in further detail with reference to the drawings and the detailed description.
Fig. 1 is a schematic structural diagram of a microstrip antenna fed by a novel strip line according to an embodiment of the present utility model;
fig. 2 is an exploded schematic view of the microstrip antenna of the novel stripline feed of fig. 1;
fig. 3 is a front view of a microstrip antenna fed by a novel strip line in the length X direction in an embodiment of the present utility model;
fig. 4 is a front view in the width Y direction of a microstrip antenna fed by a novel strip line in an embodiment of the present utility model;
fig. 5 is a return loss diagram of a receiving antenna in an embodiment of the utility model;
fig. 6 is a return loss plot of a transmit antenna in an embodiment of the utility model;
fig. 7 is a diagram of a receive antenna in an embodiment of the utility model;
fig. 8 is a pattern of a transmitting antenna in an embodiment of the utility model;
in the figure: 1-a first radiation piece, 2-a second radiation piece, 3-a first grounding piece, 4-a strip transmission line, 41-a strip feeder line and 42-an impedance transformation node; 5-grounding posts, 6-second grounding pieces, 7-first dielectric substrates, 8-second dielectric substrates, 9-third dielectric substrates, 10, fourth dielectric substrates and 11-gaps.
Description of the embodiments
The following description of the embodiments of the present utility model will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are only some, but not all embodiments of the utility model. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.
Referring to fig. 1 and 2, the microstrip antenna of the novel stripline feed provided in the embodiment of the present utility model has a layered structure, and sequentially includes, from top to bottom, a first radiation sheet 1, a second radiation sheet 2, a first grounding sheet 3, a stripline transmission line 4, and a second grounding sheet 6, wherein a first dielectric layer is filled between the first radiation sheet 1 and the second radiation sheet 2, a second dielectric layer is filled between the second radiation sheet 2 and the first grounding sheet 3, a third dielectric layer is filled between the first grounding sheet 3 and the stripline transmission line 4, and a fourth dielectric layer is filled between the stripline transmission line 4 and the second grounding sheet 6; the strip transmission line 4 feeds and excites the first radiation sheet 1 and the second radiation sheet 2 through a notch 11 in the middle of the first grounding sheet 3 to generate two adjacent resonance points, a wider frequency band is formed together, and the antenna has good return loss and linear polarization characteristics in the frequency band. Wherein the strip transmission line 4 comprises a strip feeder 41 and an impedance transformation node 42, the impedance transformation node 42 is rectangular, and the strip feeder 41 is rectangular long strip. The microstrip antenna adopting the structure has the advantages of low section, wide frequency band, good directivity and the like, and can be applied to the fields of satellite communication and the like.
As a preferable structure, as shown in fig. 2, the first dielectric layer between the first radiation sheet 1 and the second radiation sheet 2 is a first dielectric substrate 7, the second dielectric layer between the second radiation sheet 2 and the first grounding sheet 3 is a second dielectric substrate 8, the third dielectric layer between the first grounding sheet 3 and the strip transmission line 4 is a third dielectric substrate 9, the fourth dielectric layer between the strip transmission line 4 and the second grounding sheet 6 is a fourth dielectric substrate 10, and a plurality of grounding posts 5 are disposed around the strip transmission line 4, so that excitation of the strip transmission line in a high-order mode can be suppressed. In a specific manufacturing process, the microstrip antenna is of a five-layer printed substrate structure, the first radiation piece 1, the second radiation piece 2, the first grounding piece 3, the strip transmission line 4 and the second grounding piece 6 are correspondingly printed on the first dielectric substrate 7, the second dielectric substrate 8, the third dielectric substrate 9 and the fourth dielectric substrate 10, and the first radiation piece 1 and the second radiation piece 2 are correspondingly overlapped up and down; a plurality of grounding posts 5 are mounted on the third dielectric substrate 9 or the fourth dielectric substrate 10 for connecting the first grounding plate 3 and the second grounding plate 6.
In one embodiment of the present utility model, as shown in fig. 1 and 2, a circular notch 11 is disposed in the middle of the first grounding plate 3, and the strip line feeder 41 and the impedance transformation node 42 are coupled through the circular notch 11 to excite the first radiation plate 1 and the second radiation plate 2 to radiate outwards.
The first radiation sheet 1 and the second radiation sheet 2 are both in a trapezoid structure and are correspondingly stacked up and down. The trapezoid structure is of a gradual change structure, so that the Q value is lower, and the wide frequency bandwidth is provided; the two trapezoidal radiating patches are stacked to generate two adjacent resonance points to form a wider frequency band, and the antenna has good return loss and linear polarization characteristics in the frequency band.
Through design simulation, the frequency bandwidth generated by single radiation piece resonance can not meet the use requirement of satellite communication. Thus, the radiation plates (1 and 2) are designed as an upper radiation plate and a lower radiation plate, and a dielectric plate with a certain thickness is arranged between the upper radiation plate and the lower radiation plate. The two radiating patches generate two adjacent resonance points, which expands the frequency bandwidth and improves the antenna gain. Meanwhile, a strip transmission line is arranged between the first grounding piece 3 and the second grounding piece 6, and compared with a microstrip line, the strip transmission line has better transmission sealing performance, smaller loss and is not easy to be interfered by the outside.
In a specific design, the first dielectric substrate 7, the second dielectric substrate 8, the third dielectric substrate 9 and the fourth dielectric substrate 10 are made of Rogers RT5880. As shown in fig. 3 and 4, the dimensions of the microstrip antenna are as follows: length l=8 mm, width w=8 mm, height h=3.37 mm; the thickness H1 of the first dielectric substrate 7 between the first radiation piece 1 and the second radiation piece 2 is 2.08mm.
Meanwhile, the strip feed line 41 is a 50 ohm strip line, and has the following dimensions: 0.5mm wide, 5.5mm long and 17um thick; the impedance transformation node 42 has the following dimensions: 1.2mm wide and 3.7mm long; the radius of the middle circular notch 11 of the first grounding plate 3 is 2.5mm.
By adopting the microstrip antenna with the design, the size is only 8mm multiplied by 3.37mm, and the first radiation piece 1 and the second radiation piece 2 excite two adjacent resonance points at high and low respectively to form a wider bandwidth. The microstrip antenna is divided into a transmitting antenna and a receiving antenna, wherein the transmitting antenna can cover a Ku frequency band 13.75 GHz-14.5 GHz of satellite communication, and the receiving antenna can cover a satellite communication frequency band 12.25 GHz-12.75 GHz.
In specific application, as shown in figures 5 and 6, the transmitting antenna and the return loss of the antenna are at-20 dB, the bandwidth of the transmitting antenna is more than or equal to 14%, and the bandwidth of the receiving antenna is more than or equal to 10.3%. As shown in fig. 7 and 8, the transmit antenna is in the 14.125GHz pattern and the receive antenna is in the 12.5GHz pattern.
In summary, the utility model has the advantages of low profile, wide frequency band, good directivity, and the like, adopts the strip line feed structure to directly feed the radiation sheet, reduces the profile height, improves the integration level, has good return loss, gain and polarization characteristics, can be matched with the feed network of the strip line to form a flat microstrip array and a phased array, is applied to a satellite communication system, and is convenient to popularize and apply.
In the foregoing description, numerous specific details are set forth in order to provide a thorough understanding of the present utility model, but the present utility model may be practiced in other ways other than those described herein, and persons skilled in the art will readily appreciate that the present utility model is not limited to the specific embodiments disclosed above.
Claims (10)
1. A novel microstrip antenna of stripline feed, its characterized in that: the microstrip antenna is of a layered structure, and comprises a first radiation sheet, a second radiation sheet, a first grounding sheet, a strip transmission line and a second grounding sheet from top to bottom in sequence, wherein a first dielectric layer is filled between the first radiation sheet and the second radiation sheet; a second dielectric layer is filled between the second radiation piece and the first grounding piece; a third dielectric layer is filled between the first grounding piece and the strip transmission line; a fourth dielectric layer is filled between the strip transmission line and the second grounding piece; the strip transmission line excites the first radiating patch and the second radiating patch, which are stacked, through the notch on the first ground patch to generate two adjacent resonance points.
2. The novel stripline fed microstrip antenna of claim 1, wherein: the first dielectric layer between the first radiation sheet and the second radiation sheet is a first dielectric substrate; the second dielectric layer between the second radiation sheet and the first grounding sheet is a second dielectric substrate; a third dielectric layer between the first grounding plate and the strip transmission line is a third dielectric substrate; the fourth dielectric layer between the strip transmission line and the second grounding piece is a fourth dielectric substrate; the grounding posts are arranged around the strip transmission line.
3. The novel stripline fed microstrip antenna of claim 2, wherein: the microstrip antenna is of a five-layer printed substrate structure, and the first radiation sheet, the second radiation sheet, the first grounding sheet, the strip transmission line and the second grounding sheet are correspondingly printed on the first dielectric substrate, the second dielectric substrate, the third dielectric substrate and the fourth dielectric substrate.
4. The novel stripline fed microstrip antenna of claim 1, wherein: the strip transmission line comprises a strip feeder and an impedance transformation node; the impedance transformation node is rectangular, and the strip feeder is rectangular long strip.
5. The novel stripline fed microstrip antenna of claim 4, wherein: the middle part of the first grounding piece is provided with a circular notch which is used for the feeding of the strip transmission line to excite the first radiation piece and the second radiation piece to generate two adjacent resonance points.
6. The novel stripline fed microstrip antenna of claim 1, wherein: the first radiation piece and the second radiation piece are both of trapezoid structures and are stacked up and down.
7. The novel stripline fed microstrip antenna of claim 2, wherein: the materials of the first dielectric substrate, the second dielectric substrate, the third dielectric substrate and the fourth dielectric substrate are RT5880.
8. The novel stripline fed microstrip antenna of claim 2, wherein: the size of the microstrip antenna is as follows: length l=8 mm, width w=8 mm, height h=3.37 mm; the thickness of the first dielectric substrate between the first radiation piece and the second radiation piece is 2.08mm.
9. The novel stripline fed microstrip antenna of claim 4, wherein: the strip feeder is a 50 ohm strip line and has the following dimensions: 0.5mm wide, 5.5mm long and 0.762mm thick; the size of the impedance transformation node is as follows: 1.2mm wide and 3.7mm long; the radius of the middle circular notch of the first grounding piece is 2.5mm.
10. A novel stripline fed microstrip antenna as claimed in any one of claims 1 to 9, wherein: the microstrip antenna is divided into a transmitting antenna and a receiving antenna, wherein the transmitting antenna can cover a Ku frequency band 13.75 GHz-14.5 GHz of satellite communication, and the receiving antenna can cover a satellite communication frequency band 12.25 GHz-12.75 GHz.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320498133.0U CN219892405U (en) | 2023-03-15 | 2023-03-15 | Microstrip antenna with novel strip line feed |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320498133.0U CN219892405U (en) | 2023-03-15 | 2023-03-15 | Microstrip antenna with novel strip line feed |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219892405U true CN219892405U (en) | 2023-10-24 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202320498133.0U Active CN219892405U (en) | 2023-03-15 | 2023-03-15 | Microstrip antenna with novel strip line feed |
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| Country | Link |
|---|---|
| CN (1) | CN219892405U (en) |
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2023
- 2023-03-15 CN CN202320498133.0U patent/CN219892405U/en active Active
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