CN109687113A - Filter, dielectric resonant aerial with biradial zero - Google Patents
Filter, dielectric resonant aerial with biradial zero Download PDFInfo
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- CN109687113A CN109687113A CN201910057748.8A CN201910057748A CN109687113A CN 109687113 A CN109687113 A CN 109687113A CN 201910057748 A CN201910057748 A CN 201910057748A CN 109687113 A CN109687113 A CN 109687113A
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- metal floor
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- microstrip line
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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
- H01Q1/48—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
-
- 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
- H01Q9/0457—Substantially flat resonant element parallel to ground plane, e.g. patch antenna with particular feeding means electromagnetically coupled to the feed line
-
- 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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- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Waveguide Aerials (AREA)
Abstract
The invention proposes a kind of filter, dielectric resonant aerial with biradial zero, mainly solve the problems, such as that there are surface wave loss and ohmic loss for existing filtering paster antenna.It includes medium substrate (3), metal floor (4), microstrip feed line (5) and short-circuit via hole (6), metal floor and microstrip feed line are printed on the upper and lower surface of medium substrate, connect and compose feed structure by short-circuit via hole: the top of metal floor is successively fixed with second medium plate (2) and first medium block (1), first medium block realizes the matched well of radiator and feed structure as radiator, second medium plate；Metal floor surface quarter, there are two the identical stepped slits of size (7) and (8), for aperture-coupled, avoid the influence of parasitic radiation, the present invention is in the case where keeping high-gain, with good Out-of-band rejection ability, and surface wave loss is avoided, antenna radiation efficiency is improved, can be used for the reception and transmitting of wireless signal in C-band.
Description
Technical field
The invention belongs to antenna technical field, in particular to a kind of filter, dielectric resonant aerial can be used for nothing in C-band
The reception and transmitting of line signal.
Background technique
With the fast development of wireless communication, the antenna of traditional simple function is no longer satisfied wireless communication system day
Beneficial complicated and diversified demand.In order to adapt to the development of modern communications equipment, filter antenna has gradually obtained the attention of people.
Since proposing filter antenna concept, scholar both domestic and external conducts extensive research filter antenna.It is more passed before
System filter antenna design in, be antenna element and filter unit are individually designed, then the two is cascaded, but this
Kind method is difficult to realize good matching between the two.In order to solve this problem, need to add additional mating structure with reality
Matched well between existing antenna and filter unit, but this can be such that system structure becomes more complicated again, affect communication system
Size and loss height.As the frequency of mobile communication application increasingly increases, the intrinsic surface wave of conventional patch antenna
Loss and ohmic loss increase, and cause antenna radiation efficiency lower, affect the performance of mobile communication system.Dielectric resonator day
Line is a kind of without surface wave loss, the antenna of minimum ohmic loss, therefore can be effectively improved using medium resonator antenna
The performance of mobile communication system.
There are mainly two types of existing filter antennas:
The first is to realize filter antenna using antenna radiator as the afterbody resonant element of filter circuit
Design, but this method difficult design, and the multistage resonant unit of filter can occupy larger space, be unfavorable for realizing miniaturization；
Second is that some special parasitic structures or humorous are added around the feed structure or antenna radiator of antenna
Vibration structure realizes the characteristic of filter antenna by increasing two or more radiation zeros.Although this method not will increase day
The size of line meets Miniaturization Design requirement, but will affect the matching of antenna, and filtering performance is slightly worse.
In above-mentioned filter antenna, most of is to use patch as the radiator of antenna.Chinese patent grant number
CN109066072A discloses a kind of wideband filtered antenna, and although which possesses 42% impedance bandwidth, but its structure contains five
Layer patch and four layers of dielectric material, structure are complex.
Existing medium resonator antenna uses radiator of the dielectric material as antenna, possesses light weight, broadband,
Radiation efficiency height and it is easy to the advantages that motivating, but its section is higher, pattern analysis is difficult, if some parasitic structures or resonance is added
Structure will cause medium resonator antenna matching and deteriorate, therefore filtering characteristic relatively difficult to achieve.
Summary of the invention
It is an object of the invention to overcome the inherent defect of above-mentioned filtering paster antenna and medium resonator antenna to be difficult to
The shortcomings that realizing filtering characteristic, proposes a kind of filter, dielectric resonant aerial with biradial zero, good to realize
Filtering performance, while the gain of antenna is improved, expand the application range of antenna.
To achieve the above object, the present invention has the filter, dielectric resonant aerial of biradial zero, including medium substrate
3, metal floor 4 and microstrip feed line 5 are equipped with short-circuit via hole 6,5 structure of metal floor 4 and microstrip feed line at the center of medium substrate 3
At feed structure, and it is respectively printed at the upper and lower surfaces of medium substrate 3, it is characterised in that:
The top of metal floor 4 is successively fixed with second medium plate 2 and first medium block 1, which is used as spoke
Beam, second medium plate 2 realize the good matching of radiator and feed structure；
The geometric center quarter on 4 surface of metal floor, there are two the identical stepped slits 7 and 8 of size, for carrying out gap
Couple feed avoids the influence of parasitic radiation；
Metal floor 4 passes through short-circuit 6 short circuit of via hole with microstrip feed line 5 and connect.
Preferably, the cross section of the first medium block 1, second medium plate 2 and medium substrate 3 is square, and
Three center is located on same axis.
Preferably, the identical stepped slits 7 and 8 of described two sizes, between be equipped with the spacing of 0.5mm-1.2mm,
Each gap is made of two rank rectangles, and the width of the first rank rectangle 71 is 2.8mm-3.5mm, and the width of second-order rectangle 72 is
0.8mm-1.2mm。
Preferably, the microstrip feed line 5 is by one section of microstrip line 51 and one section of microstrip line 52 in the y-direction in the x-direction
Composition；Microstrip line 52 in the y-direction is located at the center in the 3 lower surface direction x of medium substrate；Microstrip line 51 in the x-direction is along y
The parasitic structure of the microstrip line 52 in direction, at the geometric center of 3 lower surface of medium substrate, microstrip line 51 in the x-direction with
Microstrip line 52 in the y-direction vertically connects, and generates the high frequency radiation zero on filtering performance.
Preferably, the inner wall of the short circuit via hole 6 is covered with one layer of metal, to generate the low frequency radiation zero on filtering performance
Value.
Compared with the prior art, the invention has the following advantages:
1, the present invention is due to using radiator of the dielectric resonator as antenna, and introduces second medium plate 2 and promote day
The matching performance of line motivates three operating modes of dielectric resonator, to effectively broaden the bandwidth of antenna, and has
Improve to effect the gain of antenna.
2, the present invention is different from general aperture-coupled using two stepped slits 7 and 8, changes metal floor 4
On current distribution.
3, the present invention is without using filter construction, but by introducing two stepped slits 7 and 8, in the x-direction micro-
Band line 52 and short-circuit via hole 6 can be realized when holding is with interior higher gain and flat gain with outer filtering characteristic.
4, for the present invention compared with existing five layers of patch and four layers of dielectric material filter antenna, simple structure is easy to process.
Detailed description of the invention
Fig. 1 is overall structure diagram of the invention；
Fig. 2 is structural side view of the invention；
Fig. 3 is the metal floor structural schematic diagram in the present invention；
Fig. 4 is the microstrip feed line structural schematic diagram in the present invention；
Fig. 5 is the S parameter simulation result diagram of antenna of the embodiment of the present invention；
Fig. 6 is the gain parameter simulation result diagram of antenna of the embodiment of the present invention；
Fig. 7 is the embodiment of the present invention at 5.49GHz, the antenna pattern of Different Plane；
Fig. 8 is the embodiment of the present invention at 5.97GHz, the antenna pattern of Different Plane；
Fig. 9 is the embodiment of the present invention at 6.56GHz, the antenna pattern of Different Plane.
Specific embodiment
Inventive antenna is further described in the following with reference to the drawings and specific embodiments.
Referring to Fig.1, the present invention includes first medium block 1, second medium plate 2, medium substrate 3, metal floor 4, micro-strip feedback
Line 5, and it is printed on two stepped slits 7 and 8 on 4 surface of metal floor.Metal floor 4 and microstrip feed line 5 are printed respectively
In the upper and lower surfaces of medium substrate 3；Be equipped with short-circuit via hole 6 at the geometric center of medium substrate 3, metal floor 4 with it is microstrip-fed
5 are connected by short-circuit via hole 6, constitute the feed structure of antenna；First medium block 1, second medium plate 2 and medium substrate 3 this three
Layer dielectric material successively fixed placement from top to bottom, without spacing and geometric center is located on same axis between three；First is situated between
Radiator of the mass 1 as antenna, second medium plate 2 realize the matched well between radiator and feed structure, two size phases
Same stepped slits 7 and 8 effectively avoid the influence of parasitic radiation for carrying out aperture-coupled.
Referring to Fig. 2, the relative dielectric constant of the first medium block 1 is 15, and cross section is the square that side length is L,
Height is h1.The relative dielectric constant of second medium plate 2 is 2.2, and it is highly h that cross section, which is the square that side length is G,2.It is situated between
The relative dielectric constant of matter substrate 3 is 3.38, and it is highly h that cross section, which is the square that side length is G,3.Wherein the range of L is
40mm-60mm, h1Range be 2.5mm-3.5mm, the range of G is 70mm-80mm, h2Range be 2.5mm-3.5mm, h3's
Range is 0.6mm-1.2mm.
Referring to Fig. 3, the metal floor 4 is the square of size identical as 3 cross section of medium substrate.Two sizes are identical
Stepped slits 7 and 8 be located at the geometric center of metal floor 4, each gap is made of two rank rectangles, wherein the first rank rectangle
71 length is ls, width ws, the length of second-order rectangle 72 is ls0, width ws0.Between two stepped slits 7 and 8
Distance be S.It is described short circuit via hole 6 be radius be r, highly with 3 height h of medium substrate3Equal through-hole, and the through-hole wall
It is covered with one layer of metal, to generate the low frequency radiation zero of filtering performance.Wherein lsRange be 7mm-9mm, wsRange be
2.8mm-3.5mm, ls0Range be 6mm-8mm, ws0Range be 0.8mm-1.2mm, the value range of S is 0.5mm-
The range of 1.2mm, r are 0.1mm-0.4mm.
Referring to Fig. 4, described microstrip-fed 5 be by length be lm, width wm, microstrip line 52 and length in the y-direction be
lm0, width wm0, microstrip line 51 in the x-direction vertically connects and composes.Wherein microstrip line 52 in the y-direction is located at medium substrate 3
At the center in the lower surface direction x, wherein parasitic structure of the microstrip line 51 as microstrip line 52 in the y-direction in the x-direction, is located at
At the geometric center of 3 lower surface of medium substrate, the high frequency radiation zero of filtering performance is generated.Wherein lmRange be 39mm-
50mm, wmRange be 2mm-4mm, lm0Range be 5mm-7mm, wm0Range be 1.5mm-2.5mm.
This example is used but is not limited to, L=40mm, G=78mm, h1=2.7mm, h2=2.9mm, h3=0.9mm, ls=
8.4mm, ws=3.2mm, ls0=7mm, ws0=1mm, S=0.93mm, r=0.245mm, lm=45.5mm, wm=3.05mm, lm0
=5.8mm, wm0=1.7mm.
Advantages of the present invention can be further illustrated by following emulation:
Emulation content and analysis:
Emulation 1: using business electromagnetic simulation software ANSYS HFSS v15.0 to above-described embodiment in 2.0GHz-
Its S parameter of simulation calculation within the scope of 10.0GHz, as a result as shown in Figure 5.
From figure 5 it can be seen that three operating modes that the present embodiment antenna is motivated, work respectively 5.49GHz,
5.97GHz and 6.56GHz, and with | S11| < -10dB is standard, and the impedance bandwidth of antenna is 5.21GHz-6.66GHz, opposite band
Width is 24.4%, possesses wider bandwidth of operation, outside passband | S11| nearly close to 0dB, show that the present invention possesses in passband
Good matching performance, and wireless signal can hardly be transmitted outside passband.
Emulation 2: using business electromagnetic simulation software ANSYS HFSS v15.0 to above-described embodiment in 2.0GHz-
Its gain of simulation calculation within the scope of 10.0GHz, as a result as shown in Figure 6.
As seen from Figure 6, average gain of the present embodiment antenna in passband is 9.5dBi, peak gain 10.2dBi.And
There are two radiation zeros at 4.12GHz and 7.47GHz, this at two yield value be less than -25dBi, it is good to show that the present invention has
Good Out-of-band rejection ability.
Emulation 3: above-described embodiment is emulated at 5.49GHz using business electromagnetic simulation software ANSYS HFSS v15.0
Its antenna pattern is calculated, as a result as shown in Figure 7.Wherein Fig. 7 (a) is the antenna pattern in the face XOZ, Fig. 7 (b) is the face YOZ
Antenna pattern.
Emulation 4: above-described embodiment is emulated at 5.97GHz using business electromagnetic simulation software ANSYS HFSS v15.0
Its antenna pattern is calculated, as a result as shown in Figure 8.Wherein Fig. 8 (a) is the antenna pattern in the face XOZ, Fig. 8 (b) is the face YOZ
Antenna pattern.
Emulation 5: above-described embodiment is emulated at 6.56GHz using business electromagnetic simulation software ANSYS HFSS v15.0
Its antenna pattern is calculated, as a result as shown in Figure 8.Wherein Fig. 9 (a) is the antenna pattern in the face XOZ, Fig. 9 (b) is the face YOZ
Antenna pattern.
From Fig. 7,8,9 as it can be seen that the greatest irradiation direction in the face XOZ and the face YOZ from three resonance frequencies is always perpendicular to spoke
Beam surface, therefore the operating mode of the embodiment is stablized, it is functional.
Above description and examples, preferred embodiment only of the invention, do not constitute any limitation of the invention, it is clear that right
It, all may be based on original of the invention after having understood the content of present invention and design principle for one of skill in the art
In the case where reason and structure, carry out in form and the various modifications and variations in details, but these are based on inventive concept
Modifications and variations are still within scope of protection of the claims of the invention.
Claims (10)
1. a kind of filter, dielectric resonant aerial with biradial zero, including medium substrate (3), metal floor (4) and micro-
Ribbon feeder (5) is equipped with short-circuit via hole (6) at the center of medium substrate (3), and metal floor (4) and microstrip feed line (5), which are constituted, to be fed
Structure, and it is respectively printed at the upper and lower surfaces of medium substrate (3), it is characterised in that:
The top of metal floor (4) is successively fixed with second medium plate (2) and first medium block (1), which makees
For radiator, second medium plate (2) realizes the good matching of radiator and feed structure；
The geometric center quarter on metal floor (4) surface, there are two the identical stepped slits of size (7) and (8), for being stitched
Gap couple feed avoids the influence of parasitic radiation；
Metal floor (4) passes through short-circuit via hole (6) short circuit with microstrip feed line (5) and connect.
2. antenna according to claim 1, it is characterised in that: the first medium block (1), second medium plate (2) and Jie
The cross section of matter substrate (3) is square, and three center is located on same axis.
3. antenna according to claim 1, it is characterised in that: the identical stepped slits (7) of two sizes and (8), it
Between be equipped with the spacing of 0.5mm-1.2mm, each gap is made of two rank rectangles, and the width of the first rank rectangle (71) is 2.8mm-
3.5mm, the width of second-order rectangle (72) are 0.8mm-1.2mm.
4. antenna according to claim 1, it is characterised in that: the microstrip feed line (5) is by one section of microstrip line in the x-direction
(51) it is formed with one section of microstrip line (52) in the y-direction；Microstrip line (52) in the y-direction is located at medium substrate (3) lower surface side x
To center at；Microstrip line (51) in the x-direction is the parasitic structure of microstrip line (52) in the y-direction, is located at medium substrate (3)
At the geometric center of lower surface, microstrip line (51) in the x-direction is vertical with microstrip line (52) in the y-direction to be connect, and generates filtering
High frequency radiation zero in performance.
5. antenna according to claim 1, it is characterised in that: the inner wall of the short circuit via hole (6) is covered with one layer of metal, with
Generate the low frequency radiation zero on filtering performance.
6. antenna according to claim 2, it is characterised in that: the first medium block (1) use relative dielectric constant for
The side length of 15 dielectric material, cross section is 40mm-60mm, is highly 2.5mm-3.5mm.
7. antenna according to claim 2, it is characterised in that: the second medium plate (2) use relative dielectric constant for
The side length of 2.2 dielectric material, cross section is 70mm-80mm, is highly 2.5mm-3.5mm.
8. antenna according to claim 2, it is characterised in that: the medium substrate (3) use relative dielectric constant for
The side length of 3.38 dielectric material, cross section is identical as the cross section side length of second medium plate (2), is highly 0.6mm-
1.2mm。
9. antenna according to claim 4, it is characterised in that: the length of microstrip line (51) in the x-direction is 39mm-
50mm, width 2mm-4mm；The length of microstrip line (52) in the y-direction is 5mm-7mm, width 1.5mm-2.5mm.
10. antenna according to claim 5, it is characterised in that: the radius of the short circuit via hole (6) is 0.1mm-0.4mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910057748.8A CN109687113A (en) | 2019-01-22 | 2019-01-22 | Filter, dielectric resonant aerial with biradial zero |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910057748.8A CN109687113A (en) | 2019-01-22 | 2019-01-22 | Filter, dielectric resonant aerial with biradial zero |
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| Publication Number | Publication Date |
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| CN109687113A true CN109687113A (en) | 2019-04-26 |
Family
ID=66193726
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| CN201910057748.8A Pending CN109687113A (en) | 2019-01-22 | 2019-01-22 | Filter, dielectric resonant aerial with biradial zero |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110797653A (en) * | 2019-11-25 | 2020-02-14 | 中北大学 | Double-frequency point/high-radiation-efficiency planar microwave resonant antenna |
| CN111129731A (en) * | 2020-02-10 | 2020-05-08 | 西安电子科技大学昆山创新研究院 | Novel dual-port feed four-frequency-band filtering duplex antenna |
| CN111224228A (en) * | 2020-01-14 | 2020-06-02 | 西安理工大学 | Stepped aperture coupling broadband antenna with double-layer non-uniform super-surface structure |
| CN111883917A (en) * | 2020-07-16 | 2020-11-03 | 南通大学 | Bandwidth reconfigurable dielectric patch filter antenna based on double-slit feed structure |
| CN112701489A (en) * | 2020-12-14 | 2021-04-23 | 深圳大学 | Band-pass frequency selection surface structure based on antenna-filter-antenna |
| CN113381192A (en) * | 2021-06-15 | 2021-09-10 | 西安电子科技大学 | Low-profile filtering antenna with broadband external suppression |
| CN114824809A (en) * | 2022-04-02 | 2022-07-29 | 中山大学 | Dielectric resonator antenna with flat-top directional diagram characteristic |
| CN114899585A (en) * | 2022-04-12 | 2022-08-12 | 华南理工大学 | Filter antenna array based on dielectric resonator |
| CN117353047A (en) * | 2023-10-10 | 2024-01-05 | 广州程星通信科技有限公司 | Broadband wide-angle scanning phased array antenna unit and array thereof |
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Cited By (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110797653B (en) * | 2019-11-25 | 2021-10-29 | 中北大学 | Double-frequency point/high-radiation-efficiency planar microwave resonant antenna |
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| CN111224228A (en) * | 2020-01-14 | 2020-06-02 | 西安理工大学 | Stepped aperture coupling broadband antenna with double-layer non-uniform super-surface structure |
| CN111224228B (en) * | 2020-01-14 | 2022-06-03 | 西安理工大学 | Stepped aperture coupling broadband antenna with double-layer non-uniform super-surface structure |
| CN111129731A (en) * | 2020-02-10 | 2020-05-08 | 西安电子科技大学昆山创新研究院 | Novel dual-port feed four-frequency-band filtering duplex antenna |
| CN111129731B (en) * | 2020-02-10 | 2022-03-29 | 西安电子科技大学昆山创新研究院 | Novel dual-port feed four-frequency-band filtering duplex antenna |
| CN111883917A (en) * | 2020-07-16 | 2020-11-03 | 南通大学 | Bandwidth reconfigurable dielectric patch filter antenna based on double-slit feed structure |
| CN111883917B (en) * | 2020-07-16 | 2022-08-12 | 南通大学 | Bandwidth reconfigurable dielectric patch filter antenna based on double-slit feed structure |
| CN112701489A (en) * | 2020-12-14 | 2021-04-23 | 深圳大学 | Band-pass frequency selection surface structure based on antenna-filter-antenna |
| CN113381192A (en) * | 2021-06-15 | 2021-09-10 | 西安电子科技大学 | Low-profile filtering antenna with broadband external suppression |
| CN114824809A (en) * | 2022-04-02 | 2022-07-29 | 中山大学 | Dielectric resonator antenna with flat-top directional diagram characteristic |
| CN114899585A (en) * | 2022-04-12 | 2022-08-12 | 华南理工大学 | Filter antenna array based on dielectric resonator |
| CN117353047A (en) * | 2023-10-10 | 2024-01-05 | 广州程星通信科技有限公司 | Broadband wide-angle scanning phased array antenna unit and array thereof |
| CN117353047B (en) * | 2023-10-10 | 2024-05-17 | 广州程星通信科技有限公司 | Broadband wide-angle scanning phased array antenna unit and array thereof |
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Application publication date: 20190426 |
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| WD01 | Invention patent application deemed withdrawn after publication |