CN204966702U - Small -size high isolation double polarization dielectric resonator antenna - Google Patents
Small -size high isolation double polarization dielectric resonator antenna Download PDFInfo
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- CN204966702U CN204966702U CN201520606062.7U CN201520606062U CN204966702U CN 204966702 U CN204966702 U CN 204966702U CN 201520606062 U CN201520606062 U CN 201520606062U CN 204966702 U CN204966702 U CN 204966702U
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- loaded sheet
- high isolation
- antenna
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Abstract
The utility model discloses a small -size high isolation double polarization dielectric resonator antenna, it includes the antenna structure frame, set up in on the antenna structure frame and be formed with microstrip - " H " gap feed structure the circuit board, set up in on the antenna structure frame and lie in the first loading sheetmetal of circuit board top, set up in on the antenna structure frame and lie in the second loading sheetmetal of circuit board below, still including set up in on the circuit board and respectively with first loading sheetmetal with second loading sheetmetal is formed with the rectangle dielectric resonator in clearance, the rectangle dielectric resonator wind the rotation of circuit board center pin 45, make the dielectric resonator both sides respectively with in the direction of circuit board diagonal parallel, form 45 double polarizations.
Description
Technical field
The utility model relates to electronic technology field, specifically, relates to a kind of small high isolation degree dual polarization medium resonator antenna.
Background technology
Along with the continuous maturation of FDD-LTE technology and country are to the granting of FDD-LTE licence plate, China Mobile's industry starts to enter comprehensive 4G epoch since then.Antenna is as one of most crucial parts of wireless communication system, and the quality of its performance directly has influence on whole communication network quality and Consumer's Experience.
Dual polarized antenna technology is the multipath transmi utilizing orthogonal electromagnetic wave incoherence and signal, under transmission duplex pattern, adopt the mutually orthogonal antenna of polarization to work simultaneously, the signal transmitted in wireless channel can be subject to the decline of several factors, this diversity technique can reduce the impact of multipath fading effectively, improves the message capacity of system.
The method realizing the design of small capacity double polarization antenna for base station at present mainly contains two kinds: the first is the element antenna using apex drive, and the second is use the micro-strip paster antenna improved.
The first element antenna needs Ba Lun feed, and feed structure and oscillator structure are all comparatively complicated, and difficulty of processing is large; The second realizes dual polarization to be needed to adopt sandwich construction, and bandwidth is less and not easily realize high-isolation.
Utility model content
For the deficiency of prior art, the utility model provides a kind of small high isolation degree dual polarization medium resonator antenna.The technical solution adopted in the utility model is as follows:
A kind of small high isolation degree dual polarization medium resonator antenna, it comprises antenna structure frame, be arranged on described antenna structure frame and be formed micro-band-" H " cutler feed structure circuit board, be arranged on described antenna structure frame and be positioned at described circuit board the first metal-loaded sheet, be arranged on described antenna structure frame and be positioned at the second metal-loaded sheet below described circuit board; Also comprise and be arranged on described circuit board and be formed with the Rectangular Enclosure with Participating Media resonator in gap with described first metal-loaded sheet and described second metal-loaded sheet respectively; Described Rectangular Enclosure with Participating Media resonator rotates 45 ° around described circuit board central shaft, makes described dielectric resonator both sides respectively on the direction parallel with described circuit board diagonal, forms ± 45 ° of dual polarizations.
According to one preferred embodiment, described circuit board comprises the 3rd dielectric-slab and is arranged at the metal ground plate of described 3rd dielectric-slab upper surface; Described metal ground plate offers two mutually perpendicular " H " shape coupling slots, in the middle part of " H " shape coupling slot described in two, the long limit of rectangular slits is respectively on the direction parallel with described circuit board diagonal, and is formed with gap between " H " shape coupling slot center described in two; Described 3rd dielectric-slab is provided with two vertical with described " H " shape coupling slot respectively microstrip feed lines; Respectively be provided with the rectangle open circuit minor matters of a different size at the end of described microstrip feed line, be connected with antenna rf joint at the top of described microstrip feed line; Described " H " shape coupling slot and described microstrip feed line form described micro-band-" H " cutler feed structure; And described Rectangular Enclosure with Participating Media resonator is positioned at directly over described metal ground plate center.
According to one preferred embodiment, described first metal-loaded sheet is the octagon comprising long limit and minor face, and its opposite side is equal between two, and the angle between adjacent long edges and minor face is 135 °; Wherein, length of short sides w
p1=18mm, is about 0.12 λ
0; Length of long sides w
p2=22.63mm, is about 0.15 λ
0.
According to one preferred embodiment, described second metal-loaded sheet is square, and its length of side lp=65mm, is about 0.42 λ
0.
According to one preferred embodiment, between described second metal-loaded sheet and described circuit board, the spacing in gap is h
1=12mm; Between described Rectangular Enclosure with Participating Media resonator upper surface and the first metal-loaded sheet lower surface, the distance in gap is h
2=3mm.
According to one preferred embodiment, the relative dielectric constant of described Rectangular Enclosure with Participating Media resonator is 12; Its long a, wide b, high h meets following relation: a=b=24mm, h=12.5mm.
According to one preferred embodiment, described antenna structure frame comprises bracing frame for installing described circuit board, for installing the first medium plate of described first metal-loaded sheet and the second medium plate for installing described second metal-loaded sheet; Wherein, support frame as described above is a metal framework, and described circuit board is fixed in described metal framework; Described first medium plate and described second medium plate are connected on support frame as described above respectively by support column; Described first metal-loaded sheet is pasted on the lower surface of described first medium plate; Described second metal-loaded sheet is pasted on the upper surface of described second medium plate; Further, described first metal-loaded sheet is corresponding with described circuit board with the position of described second metal-loaded sheet.
According to one preferred embodiment, support frame as described above is square, and its thickness is 4.6mm, and width is 67mm, approximates 0.44 λ
0; For installing the described first medium plate of described first metal-loaded sheet for square, its length of side is lg=67mm, is about 0.44 λ
0.
According to one preferred embodiment, the material of described first medium plate, described second medium plate and described 3rd dielectric-slab is high frequency sheet material FR4; Its thickness is 1.6mm, and relative dielectric constant is 3.38.
According to one preferred embodiment, support frame as described above side is provided with clamp, for fixed antenna radio-frequency joint.
Compared with prior art, the utility model has following beneficial effect:
(1) the utility model volume accomplishes miniaturization, high isolation dual polarized, be convenient to integrated, applied widely;
(2) the utility model adopts Rectangular Enclosure with Participating Media resonator to be radiating principal, does not have surface wave loss and self dielectric loss is little, reduces ohmic loss;
(3) the utility model with Rectangular Enclosure with Participating Media resonator for main radiator, first metal-loaded sheet and the second metal-loaded sheet are parasitic radiator, and can produce three frequency resonant points, relative bandwidth is wider, contain the main frequency range of domestic FDD-LTE, WCDMA communication system, practical;
(4) gain of the present utility model is high, and polarization purity is high, and swept area is wide;
(5) the utility model structure is simple, with low cost, is worth large-scale promotion to use.
Accompanying drawing explanation
Fig. 1 is the structural representation of a kind of small high isolation degree dual polarization of the utility model medium resonator antenna;
Fig. 2 is the end view of a kind of small high isolation degree dual polarization of the utility model medium resonator antenna;
Fig. 3 is the vertical view of a kind of small high isolation degree dual polarization of the utility model medium resonator antenna;
Fig. 4 is the front view of a kind of small high isolation degree dual polarization of the utility model medium resonator antenna;
Fig. 5 is a kind of small high isolation degree dual polarization of the utility model medium resonator antenna emulation S parameter figure;
Fig. 6 is that a kind of small high isolation degree dual polarization of the utility model medium resonator antenna is at 1.86GHz antenna pattern;
Fig. 7 is that a kind of small high isolation degree dual polarization of the utility model medium resonator antenna is at 1.94GHz antenna pattern;
Fig. 8 is that a kind of small high isolation degree dual polarization of the utility model medium resonator antenna is at 2GHz antenna pattern;
Fig. 9 is the structural representation of circuit board in the utility model.
In above-mentioned accompanying drawing, the component names that Reference numeral is corresponding is as follows:
1-Rectangular Enclosure with Participating Media resonator, 2-circuit board, 3-first metal-loaded sheet, 4-second metal-loaded sheet, 5-radio-frequency joint, 6-support column, 7-bracing frame, 810-first medium plate, 820-second medium version, 9-rectangle open circuit minor matters, 12-clamp; 110-first H-shaped coupling slot, 120-second H-shaped coupling slot, 210-metal ground plate, 220-the 3rd dielectric-slab, 111-first microstrip feed line, 112-second microstrip feed line.
Embodiment
Below in conjunction with drawings and Examples, the utility model is described in further detail, and execution mode of the present utility model includes but not limited to the following example.
As shown in figures 1-4, it illustrates a kind of small high isolation degree dual polarization of the utility model medium resonator antenna, it comprise antenna structure frame, be arranged on antenna structure frame and be formed micro-band-" H " cutler feed structure circuit board 2, be arranged on antenna structure frame and be positioned at the first metal-loaded sheet 3 above circuit board 2, be arranged on antenna structure frame and be positioned at the second metal-loaded sheet 4 below circuit board 2.In addition, also comprise and to be arranged on circuit board 2 and to be formed with the Rectangular Enclosure with Participating Media resonator 1 in gap with the first metal-loaded sheet 3 and the second metal-loaded sheet 4 respectively; Rectangular Enclosure with Participating Media resonator 1 rotates 45 ° around circuit board 2 central shaft, makes dielectric resonator 1 both sides respectively on the direction parallel with circuit board 2 diagonal, forms ± 45 ° of dual polarizations.
Preferably, circuit board 2 comprises the 3rd dielectric-slab 220 and is arranged at the metal ground plate 210 of the 3rd dielectric-slab 220 upper surface, as shown in Figure 9.
Metal ground plate 210 offers two mutually perpendicular " H " shape coupling slots, and in the middle part of two " H " shape coupling slots, the long limit of rectangular slits is respectively on the direction parallel with circuit board 2 diagonal, and is formed with gap between two " H " shape coupling slot centers.For H-shaped coupling slot, intermediate rectangular coupling slot is for regulating coupling amount size, and two ends rectangular slits is for regulating antenna impedance.
As, H-shaped coupling slot comprises interval and arranges and mutually perpendicular first H-shaped coupling slot 110 and the second H-shaped coupling slot 120.
3rd dielectric-slab 220 is provided with two vertical with " H " shape coupling slot respectively microstrip feed lines.
As, microstrip feed line comprises the first microstrip feed line 111 and the second microstrip feed line 112.First microstrip feed line 111 vertical with the first H-shaped coupling slot 110, the second microstrip feed line 112 vertical with the second H-shaped coupling slot 120.Microstrip feed line comprises first, second feeder line, first, second H-shaped coupling slot corresponding respectively, feeder line and H-shaped coupling slot, H-shaped coupling slot and H-shaped coupling slot orthogonal ensure that the intermediate rectangular of H-shaped coupling slot stitch in direction of an electric field be parallel to the diagonal (namely ± 45 ° of directions) of circuit board, the direction of an electric field formed in dielectric resonator is like this also all along ± 45 ° of directions.First, second microstrip feed line, the H-shaped coupling slot corresponding to it is mutually vertical and there is certain distance at center, ensures polarization electric field ± 45 ° orthogonal and certain isolation
Respectively be provided with the rectangle open circuit minor matters 9 of a different size at the end of microstrip feed line 221, be connected with the antenna rf joint 5 in order to feed at the top of microstrip feed line 221.The extreme ends of the first microstrip feed line 111 is provided with the first rectangle open circuit minor matters, and its other end is connected with the antenna rf joint 5 in order to feed.The end of the second microstrip feed line 112 is provided with the second rectangle open circuit minor matters, and its top is connected with another antenna rf joint 5.Further, the open a way size of minor matters of the first rectangle open circuit minor matters and the second rectangle is different.
" H " shape coupling slot and microstrip feed line form micro-band-" H " cutler feed structure.
Rectangular Enclosure with Participating Media resonator 1 is positioned at directly over metal ground plate 210 center.Further, Rectangular Enclosure with Participating Media resonator 1 rotates 45 ° around circuit board 2 central shaft, makes dielectric resonator 1 both sides respectively on the direction parallel with circuit board 2 diagonal, forms ± 45 ° of dual polarizations.It can make antenna have, and volume is little, structure is simple, isolation is high, wide impedance bandwidth, antenna pattern are stable and gain high advantage, is very applicablely applied to antenna of mobile communication base station.
Can form micro-band-H cutler feed structure by the combination of H-shaped coupling slot and microstrip feed line, under the micro-band-H cutler feed structure of use, Rectangular Enclosure with Participating Media resonator is main radiator, and the first metal-loaded sheet and the second metal-loaded sheet are as parasitic radiator.
As shown in figures 5-8, adopt Rectangular Enclosure with Participating Media resonance to be radiating principal, there is no surface wave loss and self dielectric loss is little, reduce ohmic loss; With Rectangular Enclosure with Participating Media resonator for main radiator, first metal-loaded sheet and the second metal-loaded sheet are parasitic radiator, three frequency resonant points can be produced, three resonance points are close to each other, antenna can be realized broadband, produce relative bandwidth wider, contain the main frequency range of domestic FDD-LTE, WCDMA communication system, practical.
Preferably, the first metal-loaded sheet 3 is the octagon comprising long limit and minor face, and its opposite side is equal between two, and the angle between adjacent long edges and minor face is 135 °; Wherein, length of short sides w
p1=18mm, is about 0.12 λ
0; Length of long sides w
p2=22.63mm, is about 0.15 λ
0.Wherein, λ
0represent center frequency wavelength.
Preferably, the second metal-loaded sheet 4 is square, and its length of side lp=65mm, is about 0.42 λ
0.Wherein, λ
0represent center frequency wavelength.
Preferably, between the second metal-loaded sheet 4 and circuit board 2, the spacing in gap is h
1=12mm; Between Rectangular Enclosure with Participating Media resonator 1 upper surface and the first metal-loaded sheet 3 lower surface, the distance in gap is h
2=3mm.
Preferably, the relative dielectric constant of Rectangular Enclosure with Participating Media resonator 1 is 12; Its long a, wide b, high h meets following relation: a=b=24mm, h=12.5mm.
Preferably, antenna structure frame comprises for the bracing frame 7 of mounting circuit boards 2, for installing the first medium plate 810 of the first metal-loaded sheet 3 and the second medium plate 820 for installing the second metal-loaded sheet 4.Wherein, bracing frame 7 is a metal framework, and circuit board 2 is fixed in metal framework.First medium plate 810 and second medium plate 820 are connected on bracing frame 7 respectively by support column 6.First metal-loaded sheet 3 is pasted on the lower surface of first medium plate 810.Second metal-loaded sheet 4 is pasted on the upper surface of second medium plate 820.The position of the first metal-loaded sheet 3 and the second metal-loaded sheet 4 is corresponding with circuit board 2.
Preferably, bracing frame 7 is square, and its thickness is 4.6mm, and width is 67mm, approximates 0.44 λ
0, wherein, λ
0represent center frequency wavelength.For installing the first medium plate 810 of the first metal-loaded sheet 3 for square, its length of side is lg=67mm, is about 0.44 λ
0, wherein, λ
0represent center frequency wavelength.
Preferably, the material of first medium plate 810, second medium plate 820 and the 3rd dielectric-slab 220 is high frequency sheet material FR4; Its thickness is 1.6mm, and relative dielectric constant is 3.38.
Preferably, clamp 12 is provided with, for fixed antenna radio-frequency joint 5 in bracing frame 7 side.
The utility model adopts radiant body stepped construction, and feed structure is micro-band-H gap, and radiation pattern is stable, symmetrical, and the front and back ratio of antenna is higher.Antenna in the present embodiment reaches about 8dB at working band average gain, and isolation is greater than 35dB.Have compared with traditional sucrose resonant aerial that volume is little, the advantage of high-gain, isolation height and width bandwidth.
All features disclosed in this specification, or the step in disclosed all methods or process, except mutually exclusive feature and/or step, all can combine by any way.
According to above-described embodiment, just the utility model can be realized well.What deserves to be explained is; under prerequisite based on said structure design; for solving same technical problem; even if some making on the utility model are without substantial change or polishing; the essence of the technical scheme adopted is still the same with the utility model, therefore it also should in protection range of the present utility model.
Claims (10)
1. a small high isolation degree dual polarization medium resonator antenna, it is characterized in that, it comprises antenna structure frame, be arranged on described antenna structure frame and be formed micro-band-" H " cutler feed structure circuit board (2), be arranged on described antenna structure frame and be positioned at described circuit board (2) top the first metal-loaded sheet (3), be arranged on described antenna structure frame and be positioned at the second metal-loaded sheet (4) of described circuit board (2) below;
Also comprise and be arranged on described circuit board (2) and be formed with the Rectangular Enclosure with Participating Media resonator (1) in gap with described first metal-loaded sheet (3) and described second metal-loaded sheet (4) respectively; Described Rectangular Enclosure with Participating Media resonator (1) rotates 45 ° around described circuit board (2) central shaft, makes described Rectangular Enclosure with Participating Media resonator (1) both sides respectively on the direction parallel with described circuit board (2) diagonal, forms ± 45 ° of dual polarizations.
2. small high isolation degree dual polarization medium resonator antenna according to claim 1, is characterized in that, described circuit board (2) comprises the 3rd dielectric-slab (220) and is arranged at the metal ground plate (210) of described 3rd dielectric-slab (220) upper surface;
Described metal ground plate (210) offers two mutually perpendicular " H " shape coupling slots, in the middle part of " H " shape coupling slot described in two, the long limit of rectangular slits is respectively on the direction parallel with described circuit board (2) diagonal, and is formed with gap between " H " shape coupling slot center described in two;
Described 3rd dielectric-slab (220) is provided with two vertical with described " H " shape coupling slot respectively microstrip feed lines; Respectively be provided with rectangle open circuit minor matters (9) of a different size at the end of described microstrip feed line, be connected with antenna rf joint (5) at the top of described microstrip feed line;
Described " H " shape coupling slot and described microstrip feed line form described micro-band-" H " cutler feed structure; And described Rectangular Enclosure with Participating Media resonator (1) is positioned at directly over described metal ground plate (210) center.
3. small high isolation degree dual polarization medium resonator antenna according to claim 1, it is characterized in that, described first metal-loaded sheet (3) is the octagon comprising long limit and minor face, and its opposite side is equal between two, and the angle between adjacent long edges and minor face is 135 °; Wherein, length of short sides w
p1=18mm, is about 0.12 λ
0; Length of long sides w
p2=22.63mm, is about 0.15 λ
0, wherein, λ
0represent center frequency wavelength.
4. small high isolation degree dual polarization medium resonator antenna according to claim 1, is characterized in that, described second metal-loaded sheet (4) is square, and its length of side lp=65mm, is about 0.42 λ
0, wherein, λ
0represent center frequency wavelength.
5. small high isolation degree dual polarization medium resonator antenna according to claim 1, is characterized in that, between described second metal-loaded sheet (4) and described circuit board (2), the spacing in gap is h
1=12mm; Between described Rectangular Enclosure with Participating Media resonator (1) upper surface and the first metal-loaded sheet (3) lower surface, the distance in gap is h
2=3mm.
6. small high isolation degree dual polarization medium resonator antenna according to claim 1, is characterized in that, the relative dielectric constant of described Rectangular Enclosure with Participating Media resonator (1) is 12; Its long a, wide b, high h meets following relation: a=b=24mm, h=12.5mm.
7. according to the small high isolation degree dual polarization medium resonator antenna one of claim 1 to 6 Suo Shu, it is characterized in that, described antenna structure frame comprises bracing frame (7) for installing described circuit board (2), for installing the first medium plate (810) of described first metal-loaded sheet (3) and the second medium plate (820) for installing described second metal-loaded sheet (4);
Wherein, support frame as described above (7) is a metal framework, and described circuit board (2) is fixed in described metal framework;
Described first medium plate (810) and described second medium plate (820) are connected on support frame as described above (7) respectively by support column (6);
Described first metal-loaded sheet (3) is pasted on the lower surface of described first medium plate (810);
Described second metal-loaded sheet (4) is pasted on the upper surface of described second medium plate (820);
Further, the position of described first metal-loaded sheet (3) and described second metal-loaded sheet (4) is corresponding with described circuit board (2).
8. small high isolation degree dual polarization medium resonator antenna according to claim 7, is characterized in that, support frame as described above (7) is square, and its thickness is 4.6mm, and width is 67mm, approximates 0.44 λ
0; For installing the described first medium plate (810) of described first metal-loaded sheet (3) for square, its length of side is lg=67mm, is about 0.44 λ
0, wherein, λ
0represent center frequency wavelength.
9. small high isolation degree dual polarization medium resonator antenna according to claim 7, is characterized in that, the material of described first medium plate (810), described second medium plate (820) and described 3rd dielectric-slab (220) is high frequency sheet material FR4; Its thickness is 1.6mm, and relative dielectric constant is 3.38.
10. small high isolation degree dual polarization medium resonator antenna according to claim 7, is characterized in that, support frame as described above (7) side is provided with clamp (12), for fixed antenna radio-frequency joint (5).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520606062.7U CN204966702U (en) | 2015-08-12 | 2015-08-12 | Small -size high isolation double polarization dielectric resonator antenna |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520606062.7U CN204966702U (en) | 2015-08-12 | 2015-08-12 | Small -size high isolation double polarization dielectric resonator antenna |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204966702U true CN204966702U (en) | 2016-01-13 |
Family
ID=55061744
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520606062.7U Withdrawn - After Issue CN204966702U (en) | 2015-08-12 | 2015-08-12 | Small -size high isolation double polarization dielectric resonator antenna |
Country Status (1)
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105071044A (en) * | 2015-08-12 | 2015-11-18 | 四川省韬光通信有限公司 | Small high-isolation dual-polarization medium resonator antenna |
| CN109216882A (en) * | 2017-06-30 | 2019-01-15 | 上海华为技术有限公司 | A kind of antenna, peripheral circuit, antenna system and signal processing method |
| CN109378578A (en) * | 2018-09-19 | 2019-02-22 | 天津大学 | Dielectric resonator antenna and aerial array on the silicon chip of high radiation efficiency high-gain |
| CN113193355A (en) * | 2021-03-19 | 2021-07-30 | 深圳市信维通信股份有限公司 | Dual-frequency dual-polarization dielectric resonant antenna for 5G communication and mobile terminal equipment |
-
2015
- 2015-08-12 CN CN201520606062.7U patent/CN204966702U/en not_active Withdrawn - After Issue
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105071044A (en) * | 2015-08-12 | 2015-11-18 | 四川省韬光通信有限公司 | Small high-isolation dual-polarization medium resonator antenna |
| CN105071044B (en) * | 2015-08-12 | 2018-08-14 | 四川省韬光通信有限公司 | A kind of small high isolation degree dual polarization medium resonator antenna |
| CN109216882A (en) * | 2017-06-30 | 2019-01-15 | 上海华为技术有限公司 | A kind of antenna, peripheral circuit, antenna system and signal processing method |
| CN109216882B (en) * | 2017-06-30 | 2019-12-24 | 上海华为技术有限公司 | Antenna, peripheral circuit and antenna system |
| US11095034B2 (en) | 2017-06-30 | 2021-08-17 | Huawei Technologies Co., Ltd. | Antenna, peripheral circuit, antenna system, and signal processing method |
| CN109378578A (en) * | 2018-09-19 | 2019-02-22 | 天津大学 | Dielectric resonator antenna and aerial array on the silicon chip of high radiation efficiency high-gain |
| CN113193355A (en) * | 2021-03-19 | 2021-07-30 | 深圳市信维通信股份有限公司 | Dual-frequency dual-polarization dielectric resonant antenna for 5G communication and mobile terminal equipment |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| PE01 | Entry into force of the registration of the contract for pledge of patent right | ||
| PE01 | Entry into force of the registration of the contract for pledge of patent right |
Denomination of utility model: Small high-isolation dual-polarization medium resonator antenna Effective date of registration: 20170602 Granted publication date: 20160113 Pledgee: Chengdu SME financing Company Limited by Guarantee Pledgor: Sichuan Taoguang Communication Co., Ltd. Registration number: 2017510000031 |
|
| AV01 | Patent right actively abandoned | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20160113 Effective date of abandoning: 20180814 |