CN112134008A - Side-fed deformed octagonal microstrip multi-frequency antenna - Google Patents
Side-fed deformed octagonal microstrip multi-frequency antenna Download PDFInfo
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- CN112134008A CN112134008A CN202010875677.5A CN202010875677A CN112134008A CN 112134008 A CN112134008 A CN 112134008A CN 202010875677 A CN202010875677 A CN 202010875677A CN 112134008 A CN112134008 A CN 112134008A
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- 230000005855 radiation Effects 0.000 claims abstract description 68
- 239000000758 substrate Substances 0.000 claims abstract description 23
- 239000002184 metal Substances 0.000 claims abstract description 9
- 238000004891 communication Methods 0.000 abstract description 6
- 238000010295 mobile communication Methods 0.000 abstract description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000004088 simulation Methods 0.000 description 2
- 230000007547 defect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
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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
- H01Q1/38—Structural form of radiating elements, e.g. cone, spiral, umbrella; Particular materials used therewith formed by a conductive layer on an insulating support
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/48—Earthing means; Earth screens; Counterpoises
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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
- H01Q5/00—Arrangements for simultaneous operation of antennas on two or more different wavebands, e.g. dual-band or multi-band arrangements
- H01Q5/10—Resonant antennas
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q5/00—Arrangements for simultaneous operation of antennas on two or more different wavebands, e.g. dual-band or multi-band arrangements
- H01Q5/20—Arrangements for simultaneous operation of antennas on two or more different wavebands, e.g. dual-band or multi-band arrangements characterised by the operating wavebands
- H01Q5/28—Arrangements for establishing polarisation or beam width over two or more different wavebands
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q5/00—Arrangements for simultaneous operation of antennas on two or more different wavebands, e.g. dual-band or multi-band arrangements
- H01Q5/30—Arrangements for providing operation on different wavebands
- H01Q5/307—Individual or coupled radiating elements, each element being fed in an unspecified way
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Abstract
The invention discloses a side-fed deformed octagonal microstrip multi-frequency antenna, which comprises an antenna medium substrate; the top surface of the antenna dielectric substrate is coated with an octagonal radiation unit, a strip-shaped radiation unit, a trapezoid radiation unit and a feed microstrip line; the octagonal radiation unit penetrates through the elongated radiation unit and is overlapped with the lower bottom edge of the trapezoidal radiation unit; the upper bottom edge of the trapezoidal radiation unit is connected with the feed microstrip line; the center point of the octagonal radiating unit is not on the same straight line with the central axis of the antenna dielectric substrate. The antenna in the invention can meet the technical requirements of multi-band communication in mobile communication; the antenna has small volume and simple structure, is convenient to integrate with a planar circuit, and can be used on the surface of a metal object.
Description
Technical Field
The invention belongs to the field of antennas, and particularly relates to a side-fed deformed octagonal microstrip multi-frequency antenna.
Background
Since the microstrip antenna was proposed in the middle of the twentieth century, the related technology has rapidly advanced, and two feeding modes, namely microstrip line side feeding and coaxial cable bottom feeding, are provided. The microstrip antenna with side feed has the problem that the microstrip line used for impedance matching is long, which is not beneficial to reducing the volume of the antenna. In addition, because various frequency standards exist in the communication field at the same time, the conventional single-band microstrip antenna cannot meet the requirements of some multi-band communication application fields.
Disclosure of Invention
Aiming at the defects of the prior art, the invention aims to provide a side-fed deformed octagonal microstrip multi-frequency antenna so as to solve the problem that a microstrip line in the prior art is long.
In order to solve the technical problems, the technical scheme adopted by the invention is as follows:
a side-fed deformed octagonal microstrip multi-frequency antenna comprises an antenna medium substrate; the top surface of the antenna dielectric substrate is coated with an octagonal radiation unit, a strip-shaped radiation unit, a trapezoid radiation unit and a feed microstrip line; the octagonal radiation unit penetrates through the elongated radiation unit and is overlapped with the lower bottom edge of the trapezoidal radiation unit; the upper bottom edge of the trapezoidal radiation unit is connected with the feed microstrip line; the center point of the octagonal radiating unit is not on the same straight line with the central axis of the antenna dielectric substrate.
Furthermore, the strip-shaped radiation unit and the trapezoid radiation unit are arranged in parallel.
Furthermore, the width of the feed microstrip line is the same as the length of the upper bottom edge of the trapezoidal radiation unit.
Furthermore, the distance between the center point of the octagonal radiating unit and the lower bottom edge of the trapezoidal radiating unit is 1 to 1.3 times of the side length of the octagonal radiating unit, and the distance between the center point of the octagonal radiating unit and the central axis of the antenna is required to ensure that the octagonal radiating unit passes through the strip-shaped radiating unit and the trapezoidal radiating unit to be connected and does not exceed the edge of the antenna medium substrate.
Furthermore, the length of the elongated radiation unit is 2 to 3 times of the side length of the octagonal radiation unit, and the width of the elongated radiation unit is 0.2 to 0.5 times of the side length of the octagonal radiation unit.
Furthermore, the length of the lower bottom edge of the trapezoidal radiation unit is smaller than that of the long strip-shaped radiation unit.
Furthermore, a grounding metal surface is arranged on the back surface of the antenna dielectric substrate; the area of the grounding metal surface is larger than that of the antenna dielectric substrate.
Further, the lower bottom edge of the trapezoidal radiation unit is divided into three line segments by the octagonal radiation unit.
Compared with the prior art, the invention has the beneficial effects that:
(1) the length of a feed microstrip line for impedance matching in the side feed microstrip antenna is shortened; (2) the antenna can meet the technical requirements of 2G/4G/5G multiband communication of mobile communication; (3) the antenna has small volume and simple structure, is convenient to integrate with a planar circuit, and can be used on the surface of a metal object.
Drawings
Fig. 1 is a front view of a side-fed deformed octagonal microstrip multi-frequency antenna of the present invention;
FIG. 2 is a simulation result of the reflection coefficient S11 parameter of the antenna;
FIG. 3 is a 1848MHz normalized radiation pattern of a side-fed deformed octagonal microstrip multi-frequency antenna;
FIG. 4 is a 2302MHz normalized radiation pattern of a side-fed deformed octagonal microstrip multi-frequency antenna;
fig. 5 is a 3380MHz normalized radiation pattern of a side-fed deformed octagonal microstrip multi-frequency antenna.
Reference numerals: the antenna comprises a 1-feed microstrip line, a 2-trapezoidal radiating element, a 3-strip radiating element and a 4-octagonal radiating element.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail with reference to the following embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
The following detailed description of the principles of the invention is provided in connection with the accompanying drawings.
The side-fed deformed octagonal microstrip multi-frequency antenna shown in fig. 1 comprises an octagonal radiating element 4 coated on the top surface of an antenna dielectric substrate, a strip-shaped radiating element 3 overlapped with the octagonal radiating element 4, a trapezoid radiating element 2 overlapped with the octagonal radiating element 4, and a feeding microstrip line 1 connected with the trapezoid radiating element 2. The back of the antenna dielectric substrate is provided with a grounding metal surface, and the size of the grounding metal surface is larger than that of the antenna dielectric substrate.
Specifically, the octagonal radiating unit 4 is connected with the trapezoidal radiating unit 2 through the strip-shaped radiating unit 3 and deviates from the central axis of the antenna dielectric substrate; the strip-shaped radiation unit 3 and the trapezoid radiation unit 2 are arranged in parallel, and the distance between the lower bottom of the trapezoid radiation unit 2 and the long edge of the strip-shaped radiation unit 3 is S; the upper bottom of the trapezoidal radiation unit is connected with the feed microstrip line 1; width W of the feed microstrip line 11The length of the upper bottom of the trapezoidal radiation unit 2 is the same.
The side length of the octagonal radiating element 4 is W10The distance between the central point and the lower bottom of the trapezoidal radiation unit 2 is L4The distance between the central point of the antenna and the central axis of the antenna dielectric substrate is W9The distance between the center point of the octagonal radiating unit 4 and the lower bottom edge of the trapezoidal radiating unit 2 is 1 to 1.3 times of the side length of the octagonal radiating unit 4, and it is ensured that the octagonal radiating unit 4 passes through the strip-shaped radiating unit 3 and the trapezoidal radiating unit 2 to be connected and does not exceed the edge of the antenna medium substrate.
The distances between the left side edge of the strip-shaped radiation unit 3 and the upper intersection point and the lower intersection point of the left side of the octagon are W respectively6And W5The distances between the right side edge of the strip-shaped radiation unit 3 and the upper and lower intersection points on the right side of the octagon are W respectively7And W8The length of the strip-shaped radiation unit 3 is about 2 to 3 times of the side length of the octagon, and the length of the strip-shaped radiation unit is 2 to 3 times of the side length of the octagonWidth L of the radiating element 33About 0.2 to 0.5 times the side length of the octagon.
The lower bottom of the trapezoidal radiation unit 2 is slightly shorter than the long side of the long strip-shaped radiation unit 3, and is divided into three line segments by an octagon, and the lengths of the three line segments are W2、W3And W4The height of the trapezoidal radiation unit 2 is (L)1-L2) Wherein the microstrip line has a length L2。
The octagon radiating element 4 is the antenna radiation main part, and the position of 4 central points of octagon radiating element can influence each frequency channel resonance point frequency, rectangular shape radiating element 3 and trapezoidal radiating element 2 not only participate in the antenna radiation still play impedance matching's effect, adjust rectangular shape radiating element and trapezoidal radiating element length and width and be favorable to adjusting each frequency channel and match.
In the embodiment of the invention, when the antenna substrate is a Rogers RO4350 substrate (r =3.66, tan = 0.004) with a thickness of 0.6mm, after the antenna structure is optimally designed by applying the simulation software HFSS, the length and the width of the whole antenna dielectric substrate are respectively 56 mm and 56 mm. The following parameters are adopted for each size of the antenna:
W1=3.6mm、W2=20.65mm、W3=17.05mm、W4=12.3mm、W5=20.46mm、W6=11.63mm、W7=5.33mm、W8=9.47mm、W9=4mm、W10=17.39mm、L1=9.4mm、L2=1.4mm、L3=6.4mm, L4=19.6mm, S =1.1 mm. In addition, the length of the elongated radiation unit is 53 mm; the size of the grounding metal surface on the back surface of the antenna is 65 mm multiplied by 70 mm.
Fig. 2 shows the simulation result of the antenna reflection coefficient S11 parameter. As can be seen from FIG. 2, when the antenna reflection coefficients S11< -10dB (corresponding to the standing wave ratio VSWR ≦ 2) are satisfied, the resonance points of the antenna frequency are 1848/2302/3380 MHz respectively. Table 1 lists the parameters of the antenna such as reflection coefficient, antenna efficiency, gain, etc. at the resonance point of each frequency. The gains of the resonance points are 4.13 dBi (1848 MHz), 2.12 dBi (2302 MHz) and 3.21 dBi (3380 MHz), and the conventional application requirements can be met.
TABLE 1 parameters of the antenna
| Frequency (MHz) | S11 (dB) | Efficiency of antenna | Gain (dBi) |
| 1848 | -23.1 | 61.8％ | 4.13 |
| 2302 | -11.9 | 52.8％ | 2.12 |
| 3380 | -17.8 | 86.1％ | 3.21 |
Fig. 3 to 5 are normalized radiation pattern of each frequency point, wherein fig. 3 is a 1848MHz normalized radiation pattern of a side-fed deformed octagonal microstrip multi-frequency antenna; FIG. 4 is a 2302MHz normalized radiation pattern of a side-fed deformed octagonal microstrip multi-frequency antenna; fig. 5 is a 3380MHz normalized radiation pattern of a side-fed deformed octagonal microstrip multi-frequency antenna. The normalized radiation pattern of each frequency point shows that the antenna can meet the communication requirement on the directivity and can be used in the communication field.
The foregoing shows and describes the general principles and broad features of the present invention and advantages thereof. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are described in the specification and illustrated only to illustrate the principle of the present invention, but that various changes and modifications may be made therein without departing from the spirit and scope of the present invention, which fall within the scope of the invention as claimed. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (8)
1. The utility model provides a deformation octagon microstrip multifrequency antenna is presented to side which characterized in that: comprises an antenna dielectric substrate; the top surface of the antenna dielectric substrate is coated with an octagonal radiation unit (4), a strip-shaped radiation unit (3), a trapezoid radiation unit (2) and a feed microstrip line (1); the octagonal radiation unit (4) penetrates through the elongated radiation unit (3) and is overlapped with the lower bottom edge of the trapezoidal radiation unit (2); the upper bottom edge of the trapezoidal radiation unit (2) is connected with the feed microstrip line (1); the central point of the octagonal radiating unit (4) is not on the same straight line with the central axis of the antenna dielectric substrate.
2. The side-fed deformed octagonal microstrip multi-frequency antenna according to claim 1, wherein: the strip-shaped radiation unit (3) and the trapezoid radiation unit (2) are arranged in parallel.
3. The side-fed deformed octagonal microstrip multi-frequency antenna according to claim 1, wherein: the width of the feed microstrip line (1) is the same as the length of the upper bottom edge of the trapezoidal radiation unit (2).
4. The side-fed deformed octagonal microstrip multi-frequency antenna according to claim 1, wherein: the distance between the center point of the octagonal radiating unit (4) and the lower bottom edge of the trapezoidal radiating unit (2) is 1-1.3 times of the side length of the octagonal radiating unit (4).
5. The side-fed deformed octagonal microstrip multi-frequency antenna according to claim 1, wherein: the length of the strip-shaped radiation unit (3) is 2-3 times of the side length of the octagonal radiation unit (4), and the width of the strip-shaped radiation unit is 0.2-0.5 times of the side length of the octagonal radiation unit (4).
6. The side-fed deformed octagonal microstrip multi-frequency antenna according to claim 1, wherein: the length of the lower bottom edge of the trapezoidal radiation unit (2) is smaller than that of the long-strip-shaped radiation unit (3).
7. The side-fed deformed octagonal microstrip multi-frequency antenna according to claim 1, wherein: the back of the antenna dielectric substrate is provided with a grounding metal surface; the area of the grounding metal surface is larger than that of the antenna dielectric substrate.
8. The side-fed deformed octagonal microstrip multi-frequency antenna according to claim 1, wherein: the lower bottom edge of the trapezoidal radiation unit (2) is divided into three line segments by the octagonal radiation unit (4).
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| CN202010875677.5A CN112134008B (en) | 2020-08-27 | 2020-08-27 | Side-fed deformed octagonal microstrip multi-frequency antenna |
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| CN202010875677.5A CN112134008B (en) | 2020-08-27 | 2020-08-27 | Side-fed deformed octagonal microstrip multi-frequency antenna |
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| CN112134008B CN112134008B (en) | 2023-09-22 |
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