CN202444053U - Double-frequency paster antenna unit and radio frequency antenna system applied in wireless local area network - Google Patents
Double-frequency paster antenna unit and radio frequency antenna system applied in wireless local area network Download PDFInfo
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- CN202444053U CN202444053U CN2012200214011U CN201220021401U CN202444053U CN 202444053 U CN202444053 U CN 202444053U CN 2012200214011 U CN2012200214011 U CN 2012200214011U CN 201220021401 U CN201220021401 U CN 201220021401U CN 202444053 U CN202444053 U CN 202444053U
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Abstract
The utility model relates to a paster radio frequency antenna unit supporting double frequencies. The paster radio frequency antenna unit comprises a top metal sheet, an upper level medium plate, a middle layer metal sheet, a lower layer medium plate and a bottom metal sheet which are attached from up to down, wherein the middle layer metal sheet is provided with an annular slit, the top metal sheet is arranged over part of the annular slit, and the bottom metal sheet is a microstrip line arranged under the part of the annular slit overlapped with the top metal sheet. The utility model also relates to a binary MIMO radio frequency antenna system, comprising two of the radio frequency antenna units connected side by side which are respectively first and second signal transmit-receive terminals. Employing the MIMO antenna provided in the utility model, the gains of the two antenna units at the frequency ranges 2.4 GHz and 5 GHz are respectively greater than 4.1 dB and 6.7 dB, thereby the double-frequency paster antenna unit and the radio frequency antenna system thereof applied in a wireless local area network are provided, wherein the structure is simple, cost is low, volume is small, and WLAN can be adaptable.
Description
Technical field
The utility model relates to technical field of radio, and particularly antenna technical field specifically is meant a kind of Dual-frequency Patch Antennas unit and is applied to the radio-frequency antenna system of WLAN.
Background technology
Be broadly divided into MIMO algorithm development, the wireless modeling of MIMO and three main aspects of many Antenna Design for MIMO (Multiple-Input Multiple-Output, the multiple-input, multiple-output) communication technology at present.
The signal that many antennas send mixes through beyond-the-horizon communication in wireless channel; Again after receiving the many antennas receptions of end; System during through sky Processing Algorithm separate and recover the emission data; Its performance depends on that each antenna element receives the independent degree of signal, i.e. correlation, and correlation between many antennas and beyond-the-horizon communication and antenna performance are closely related.Simultaneously, the phase mutual interference that is caused by mutual coupling between many antennas generally is difficult to solve with base band algorithm and signal processing technology.Therefore, the high-performance that realizes mimo system also depends on the appropriate design of many antenna elements except that the richness that depends on multipath transmisstion.For spatial domain, experiment shows, because the beyond-the-horizon communication environment is different, provides the low relevant needed antenna element spacing of fading signal in space also different.Such as, the macrocell environment of remote districts possibly need several wavelength intervals could obtain the antenna decorrelation, maybe a need half wavelength spacing and enrich the indoor environment of scattering.Can for polarizing field, can the cross polarization degree of coupling have determined polarization diversity is provided, the parallel channel of nearly orthogonal maybe is provided.Therefore, the design of the many antennas of MIMO is that installation site with communication environments and antenna is closely related.
Do some researchs to the MIMO Antenna Design both at home and abroad in recent years, mainly contained following correlation technique content:
【1】Azremi?A.A.H.，Kyro，M.，Ilvonen，J.Five-element?inverted-F?antenna?array?for?MIMO?communications?and?radio?direction?finding?on?mobile?terminal?2009Loughborough?Antennas&Propagation?Conference，2009，557-560。
【2】Saou-Wen?Su，Jui-Hung?Chou.Internal?Wideband?Monopole?Antenna?for?MIMO?Access-point?Applications.2008Antennas?and?Propagation?Society?International?Symposium.2008，1-4。
【3】Chi-Yuk?Chiu，Jie-Bang?Yan，Murch?R.D.Compact?Three-Port?Orthogonally?Polarized?MIMO?Antennas.IEEE?Antennas?and?Wireless?Propagation?Letters.2007，(6)：619-622
【4】Sarrazin?J.，Mahe?Y.，Avrillon?S.Investigation?on?Cavity/Slot?Antennas?for?Diversity?and?MIMO?Systems：The?Example?of?a?Three-Port?Antenna.IEEE?Antennas?and?Wireless?Propagation?Letters.2008，(7)：414-417。
At space diversity and angle diversity antenna array design aspect; Document [1] is formed a MIMO battle array with the IFA antenna of five standards; In order to reduce the mutual coupling between the antenna element; It is divided into three groups with five antenna elements, is placed on respectively on three edges on floor, strengthens the antenna element distance to reach the purpose of decorrelation as far as possible.Simultaneously, two IFA antennas with the limit adopt the form of " back-to-back " to place (both short circuit arms are adjacent, and the radiation arm opening is reverse).The modes of emplacement of this " back-to-back " has brought angle diversity to a certain extent.Document [2] has carried out certain improvement with the placement form of this " back-to-back "; It is placed on 3 antenna elements on the rounded face; Angle between three antenna elements is 120 °; The short circuit arm of three antennas is all towards circle centre position, thereby forms angle diversity to a certain extent, and the mutual coupling between each antenna element is all less than-20dB.On the integral body, adopt space diversity and angle diversity can obtain better decorrelation performance and the better diversity gain of acquisition simultaneously, in MIMO design in recent years, be widely used.But the maximum problem of these class methods is that the MIMO antenna volume is bigger usually, is unfavorable for the product global design.
Consider bulk factor, the researcher has introduced multipole antenna in the MIMO Antenna Design both at home and abroad at present.Document [3] [4] has designed the multi-polarization antenna of a series of three-dimensionals, and they are first in the basis with linearly polarized radiation, then a plurality of duplicate radiation sources is carried out three-dimensional orthogonal arrangement cleverly and places, thereby realize the multipole collection that divides.Wherein document [3] incorporates the angle diversity design when realizing polarization diversity, thereby makes that the mutual coupling between each radiation element is lower.Yet the multi-polarization antenna of this three-dimensional structure extremely is difficult to install, and using value is little in actual engineering.
In addition, from present domestic and international MIMO Antenna Design, mainly focus mostly on research and design in mobile base station and portable terminal, the MIMO Antenna Design that is applied on the WLAN is more rare.
The utility model content
The purpose of the utility model is to have overcome above-mentioned shortcoming of the prior art; A kind of support 2.4-2.484GHz and 5.15-5.825GHz are provided two frequency ranges; Simultaneously can also support the MIMO communication of 2T2R at least, and simple in structure, with low cost; Volume is less, is applicable to the Dual-frequency Patch Antennas unit of WLAN and is applied to the radio-frequency antenna system of WLAN.
In order to realize above-mentioned purpose, the paster radio-frequency antenna unit of the support double frequency of the utility model has following formation:
This radio-frequency antenna unit comprises top-level metallic sheet, top dielectric plate, middle level sheet metal, layer dielectric plate and the underlying metal sheet of fitting successively from top to bottom; The overall dimension of described top dielectric plate, middle level sheet metal and layer dielectric plate is complementary; Offer annular slot on the sheet metal of described middle level; The center of circle of described annular slot is the center of this paster radio-frequency antenna unit; Described top-level metallic sheet departs from the center of described paster radio-frequency antenna unit and is arranged at the position of the described annular slot of part top; Described underlying metal sheet is the microstrip line of terminal open circuit; Described microstrip line is arranged at the position of described and top-level metallic sheet superposed part annular slot below, this microstrip line as feeder line to described annular slot feed, and through described annular slot to described top-level metallic sheet coupling feed.
This can support that the overall dimension of described top dielectric plate, middle level sheet metal and layer dielectric plate is the square that overlaps in the paster radio-frequency antenna unit of double frequency, and the center of circle of described annular slot is this foursquare center.
This can support in the paster radio-frequency antenna unit of double frequency that the profile of described top-level metallic sheet is a square, and the length of side of this top-level metallic sheet is half the less than described top dielectric edges of boards length.
This can be supported in the paster radio-frequency antenna unit of double frequency; Described underlying metal sheet is a rectangle; One end of the length direction of described rectangle underlying metal sheet is positioned at the edge of described layer dielectric plate, and the other end of this rectangle underlying metal leaf length direction extends to corresponding in the described annular slot and be positioned at the position of described top-level metallic sheet below.
This can support that the length of side of described top dielectric plate, middle level sheet metal and layer dielectric plate is 70mm in the paster radio-frequency antenna unit of double frequency; The internal diameter of described annular slot is 14.3mm, and its external diameter is 15.8mm; The length of side of described top-level metallic sheet is 10mm; The distance at the center of this top-level metallic sheet and described top dielectric plate center is 14mm; The length of described underlying metal sheet is 26.4mm, and its width is 2.2mm; The foam medium plate that described top dielectric plate is a dielectric constant 1.01, it highly is 4.2mm; Described layer dielectric plate is the PTFE medium plate, and it highly is 0.8mm.
The utility model also provides a kind of binary multiple-input, multiple-output radio-frequency antenna system that is applied in the WLAN; This antenna system comprises two antenna elements that are respectively the first signal transmitting and receiving end and secondary signal sending and receiving end that link to each other side by side, and described antenna element is above-mentioned radio-frequency antenna unit.
This is applied in the binary multiple-input, multiple-output radio-frequency antenna system in the WLAN, and the angle between the direction of the underlying metal sheet of the direction of the underlying metal sheet of the described first signal transmitting and receiving end and described secondary signal sending and receiving end is 90 degree.
This is applied in the binary multiple-input, multiple-output radio-frequency antenna system in the WLAN, and the center distance of described two radio-frequency antenna unit is 38mm, and the distance between the top-level metallic sheet of described two radio-frequency antenna unit is 54mm.
Adopted the radio-frequency antenna unit of this utility model to comprise top-level metallic sheet, top dielectric plate, middle level sheet metal, layer dielectric plate and the underlying metal sheet of fitting successively from top to bottom.Offer annular slot on the sheet metal of middle level; The center of circle of annular slot is the center of this paster radio-frequency antenna unit; The top-level metallic sheet departs from the center of described paster radio-frequency antenna unit and is arranged at the position of the described annular slot of part top; The underlying metal sheet is the microstrip line of terminal open circuit; This microstrip line is arranged at the position with top-level metallic sheet superposed part annular slot below, and as feeder line to described annular slot feed, simultaneously through described annular slot to described top-level metallic sheet coupling feed.Make again each antenna element of MIMO antenna that two these radio-frequency antenna unit form in the gain of 2.4GHz and two frequency bands of 5GHz respectively greater than 4.1dB and 6.7dB, the mutual coupling between each feed port of while is less than-20dB, to reach low correlation.Thereby provide a kind of simple in structure, with low cost, volume is less, and is applicable to WLAN, Dual-frequency Patch Antennas unit and be applied to the radio-frequency antenna system of WLAN.
Description of drawings
Fig. 1 is the layer structural representation of the paster radio-frequency antenna unit that can support double frequency of the utility model.
Fig. 2 is the profile that each laminating of paster radio-frequency antenna unit that can support double frequency of the utility model closes.
Fig. 3 is the vertical view of the paster radio-frequency antenna unit that can support double frequency of the utility model.
Fig. 4 is the upward view of the paster radio-frequency antenna unit that can support double frequency of the utility model.
Fig. 5 is the structural representation that is applied to the binary multiple-input, multiple-output radio-frequency antenna system in the WLAN of the utility model.
Fig. 6 is the S parameter sketch map in practical application of the binary multiple-input, multiple-output radio-frequency antenna system of the utility model.
Fig. 7 is the coefficient correlation result in practical application of the binary multiple-input, multiple-output radio-frequency antenna system of the utility model.
Fig. 8 is the gain results sketch map of dual-band antenna unit in practical application of the utility model.
Fig. 9 is that the three dimensional field shape in 2.44GHz frequency range center frequency point in practical application of the binary multiple-input, multiple-output radio-frequency antenna system of the utility model is schemed.
Figure 10 is that the three dimensional field shape in 5.5GHz frequency range center frequency point in practical application of the binary multiple-input, multiple-output radio-frequency antenna system of the utility model is schemed.
Figure 11 is the schematic network structure in being applied to WLAN of the binary multiple-input, multiple-output radio-frequency antenna system of the utility model.
Embodiment
In order more to be expressly understood the technology contents of the utility model, the special following examples of lifting specify.
See also shown in Figure 1ly, be the layer structural representation of the paster radio-frequency antenna unit that can support double frequency of the utility model.
In one embodiment, to shown in Figure 4, this can support the paster radio-frequency antenna unit of double frequency to comprise top-level metallic sheet 1, top dielectric plate 2, middle level sheet metal 3, layer dielectric plate 4 and the underlying metal sheet 5 of fitting successively from top to bottom like Fig. 1.The overall dimension of wherein said top dielectric plate 2, middle level sheet metal 3 and layer dielectric plate 4 is complementary, and is the square that overlaps.Offer annular slot 31 on the described middle level sheet metal 3, the center of circle of described annular slot 31 is the center of this paster radio-frequency antenna unit, that is the center of described square top dielectric plate 2, middle level sheet metal 3 and layer dielectric plate 4.Described top-level metallic sheet 1 is the square-shaped metal sheet that departs from the center of described paster radio-frequency antenna unit and be arranged at the described annular slot of part 31 top positions, and the length of side of this square top-level metallic sheet 1 is half the less than described top dielectric edges of boards long 2.Described underlying metal sheet 5 is the rectangle microstrip line of terminal open circuit; One end of the length direction of described rectangle underlying metal sheet 5 is positioned at the edge of described layer dielectric plate 4; The other end of these rectangle underlying metal sheet 5 length directions extends to corresponding in the described annular slot 31 and be positioned at the position of described top-level metallic sheet 1 below; Thereby make this microstrip line 5 be arranged at described and positions top-level metallic sheet 1 superposed part annular slot 31 belows; This microstrip line 5 as feeder line to described annular slot 31 feeds, and through described annular slot 31 to described top-level metallic sheet 1 coupling feed.
In a kind of more preferably execution mode, the characteristic impedance of described underlying metal sheet 5 is 50 ohm.
In a kind of preferred execution mode, like Fig. 2,3, shown in 4, the length of side L of described top dielectric plate 2, middle level sheet metal 3 and layer dielectric plate 4 is 70mm; The internal diameter R1 of described annular slot 31 is 14.3mm, and its external diameter R2 is 15.8mm; The length of side P of described top-level metallic sheet 1 is 10mm; The distance A at the center of the center of this top-level metallic sheet 1 and described top dielectric plate 2 is 14mm; The length fy of described underlying metal sheet 5 is 26.4mm, and its width fx is 2.2mm; Described top dielectric plate 2 is the foam medium plate of dielectric constant 1.01, and its height h1 is 4.2mm; Described layer dielectric plate 4 is the PTFE medium plate of dielectric constant 2.55, and its height h2 is 0.8mm.
The utility model also provides a kind of binary multiple-input, multiple-output radio-frequency antenna system that is applied in the WLAN; In one embodiment; As shown in Figure 5; Described antenna system comprises two antenna elements that are respectively the first signal transmitting and receiving end Port1 and secondary signal sending and receiving end Port2 that link to each other side by side, and described antenna element is radio-frequency antenna unit mentioned above.Wherein, the angle between the direction of the underlying metal sheet 52 of the direction of the underlying metal sheet 51 of the described first signal transmitting and receiving end Port1 and described secondary signal sending and receiving end Port2 is 90 degree.
A kind of preferred embodiment in, as shown in Figure 5, the center distance D of described two radio-frequency antenna unit is 38mm, between the top-level metallic sheet 11 and 12 of described two radio-frequency antenna unit is 54mm apart from d.
In the application of the utility model, the radio-frequency antenna unit of the utility model is made up of for stack two layer medium plate and three-layer metal hand-deliver, and the thickness of two layer medium plate is respectively h1 and h2 up and down, and relative dielectric constant is respectively ε r1 and ε r2.The antenna outside is square, and the length of side is L.The top-level metallic paster is a square, and the length of side is P, and the centre distance of this paster center and entire antenna is A.Open annular slot on the metal covering of middle level, external diameter is respectively R1 and R2 in it, and its center of circle overlaps with the center of entire antenna.The underlying metal face is the microstrip line of terminal open circuit, and its length and width are respectively fy and fx.This microstrip line is as feeder line, the annular slot feed on intermediate metal layer not only, but also can see through the slit, to top layer square patch coupling feed.For the top layer paster, that section that is in the annular slot under it forms slit coupling feed to it jointly with the bottom microstrip line.The characteristic impedance of feeder line is 50 ohm, depends on ε r2 and fx.Simultaneously, in order to increase the bandwidth of 5G frequency range, when increasing h1 to 4.2mm, adopt the radio-frequency antenna unit of the utility model relative dielectric constant to be merely 1.01 foam as the top dielectric plate.Layer dielectric plate employing relative dielectric constant is 2.55 polytetrafluoroethylene (F4BM-2) material, and dielectric loss angle tangent is less than 0.001., debugging obtains shown in the structure numerical value following table 1 after optimizing:
| h1 | h2 | εr1 | εr2 | L | P | R1 | R2 | fx | fy | A |
| 4.2mm | 0.8mm | 1.01 | 2.55 | 70mm | 10mm | 14.3mm | 15.8mm | 2.2mm | 26.4mm | 14mm |
Table 1 radio-frequency antenna cell parameters table
Adopt the binary MIMO antenna of the dual-band antenna of the utility model as cell design, as shown in Figure 5, D is two antenna element center distance among the figure, and d is the center distance of top-level metallic paster.Optimize repeatedly through emulation, finally get the D=38 millimeter.
The S parameter that when the D=38 millimeter, gets this double frequency binary MIMO antenna is as shown in Figure 6.S11 overlaps with S22 basically fully, all at 2.35-2.55GHz and 5.08-5.87GHz less than-10dB, the S12 in the resonance band remains on-below the 23dB.Fig. 7 is the coefficient correlation that draws according to the S calculation of parameter.Coefficient correlations in two frequency ranges all remain on below 0.001, and the receiving and transmitting signal on two ports is separate.Produce the annular slot center distance D=38mm of 2.4G frequency range this moment, is equivalent to 0.3 times of wavelength (for the wavelength of 2.4GHz); The center distance d=54mm of top-level metallic paster is equivalent to 0.92 times of wavelength (for the wavelength of 5.15GHz).
This moment this utility model each antenna element of binary MIMO antenna in the gain of 2.4GHz and two frequency bands of 5GHz respectively greater than 4.1dB and 6.7dB.As shown in Figure 8, frequency is high more in the 5G frequency range, and it is high more to gain, and can reach more than the 9.3dB.2.44GHz the three dimensional field shape of frequency range and 5.5GHz frequency range center frequency point figure is respectively like Fig. 9, shown in Figure 10.
Shown in figure 11, be the schematic network structure in being applied to WLAN of the binary multiple-input, multiple-output radio-frequency antenna system of the utility model.The MIMO antenna of the utility model uses in WLAN between the local side and terminal the spacing wave of wireless connections to send and receives link.
The process of sending data with local side is an example.Wireless local side is through BB (baseband, base band)/MAC (Media Access Control of WIFI (wireless fidelity, wireless compatibility authentication); The hardware address) digital coding that will send of module; Add agreement, packing etc., and be transferred to WIFI RF module.WIFI RF module modulates and is transferred to double frequency WIFI PA (Power Amplifier, power amplifier) to data.Double frequency WIFI PA carries out prosperity to signal, increases transmitting power.Final through radiation in the binary MIMO days alignment free spaces in the present patent application.Wireless terminal is accepted the wireless signal in the free space and is transferred to WIFI PA through the binary MIMO antenna in the present patent application.Double frequency WIFI PA carries out signal filtering, shaping and amplification to signal, and the signal of accepting is transferred to WIFI RF module.WIFI RF module is carried out demodulation to data and is transferred to the BB/MAC module of WIFI.The BB/MAC module of WIFI is the data decode of accepting, and operation such as unpacks, and finally can reply out data.The process that local side is accepted data only is the reverse of said process, and wherein each module also can be selected various chips for use according to actual needs, therefore repeats no more.
Adopted the radio-frequency antenna unit of this utility model to comprise top-level metallic sheet, top dielectric plate, middle level sheet metal, layer dielectric plate and the underlying metal sheet of fitting successively from top to bottom.Offer annular slot on the sheet metal of middle level; The center of circle of annular slot is the center of this paster radio-frequency antenna unit; The top-level metallic sheet departs from the center of described paster radio-frequency antenna unit and is arranged at the position of the described annular slot of part top; The underlying metal sheet is the microstrip line of terminal open circuit; This microstrip line is arranged at the position with top-level metallic sheet superposed part annular slot below, and as feeder line to described annular slot feed, simultaneously through described annular slot to described top-level metallic sheet coupling feed.Make again each antenna element of MIMO antenna that two these radio-frequency antenna unit form in the gain of 2.4GHz and two frequency bands of 5GHz respectively greater than 4.1dB and 6.7dB, the mutual coupling between each feed port of while is less than-20dB, to reach low correlation.Thereby provide a kind of simple in structure, with low cost, volume is less, and is applicable to WLAN, Dual-frequency Patch Antennas unit and be applied to the radio-frequency antenna system of WLAN.
In this specification, the utility model is described with reference to its certain embodiments.But, still can make various modifications and conversion obviously and not deviate from the spirit and the scope of the utility model.Therefore, specification and accompanying drawing are regarded in an illustrative, rather than a restrictive.
Claims (8)
1. the paster radio-frequency antenna unit that can support double frequency; It is characterized in that; Described radio-frequency antenna unit comprises top-level metallic sheet, top dielectric plate, middle level sheet metal, layer dielectric plate and the underlying metal sheet of fitting successively from top to bottom; The overall dimension of described top dielectric plate, middle level sheet metal and layer dielectric plate is complementary; Offer annular slot on the sheet metal of described middle level, the center of circle of described annular slot is the center of this paster radio-frequency antenna unit, and described top-level metallic sheet departs from the center of described paster radio-frequency antenna unit and is arranged at the position of the described annular slot of part top; Described underlying metal sheet is the microstrip line of terminal open circuit, and described microstrip line is arranged at position described and top-level metallic sheet superposed part annular slot below.
2. the paster radio-frequency antenna unit that can support double frequency according to claim 1; It is characterized in that; The overall dimension of described top dielectric plate, middle level sheet metal and layer dielectric plate is the square that overlaps, and the center of circle of described annular slot is this foursquare center.
3. the paster radio-frequency antenna unit that can support double frequency according to claim 2 is characterized in that, the profile of described top-level metallic sheet is a square, and the length of side of this top-level metallic sheet is half the less than described top dielectric edges of boards length.
4. the paster radio-frequency antenna unit that can support double frequency according to claim 3; It is characterized in that; Described underlying metal sheet is a rectangle; One end of the length direction of described rectangle underlying metal sheet is positioned at the edge of described layer dielectric plate, and the other end of this rectangle underlying metal leaf length direction extends to corresponding in the described annular slot and be positioned at the position of described top-level metallic sheet below.
5. the paster radio-frequency antenna unit that can support double frequency according to claim 4 is characterized in that the length of side of described top dielectric plate, middle level sheet metal and layer dielectric plate is 70mm; The internal diameter of described annular slot is 14.3mm, and its external diameter is 15.8mm; The length of side of described top-level metallic sheet is 10mm; The distance at the center of this top-level metallic sheet and described top dielectric plate center is 14mm; The length of described underlying metal sheet is 26.4mm, and its width is 2.2mm; The foam medium plate that described top dielectric plate is a dielectric constant 1.01, it highly is 4.2mm; Described layer dielectric plate is the PTFE medium plate, and it highly is 0.8mm.
6. binary multiple-input, multiple-output radio-frequency antenna system that is applied in the WLAN; It is characterized in that; Described antenna system comprises two antenna elements that are respectively the first signal transmitting and receiving end and secondary signal sending and receiving end that link to each other side by side, and described antenna element is each described radio-frequency antenna unit in the claim 1 to 5.
7. the binary multiple-input, multiple-output radio-frequency antenna system that is applied in the WLAN according to claim 6; It is characterized in that the angle between the direction of the underlying metal sheet of the direction of the underlying metal sheet of the described first signal transmitting and receiving end and described secondary signal sending and receiving end is 90 degree.
8. the binary multiple-input, multiple-output radio-frequency antenna system that is applied in the WLAN according to claim 7; It is characterized in that; The center distance of described two radio-frequency antenna unit is 38mm, and the distance between the top-level metallic sheet of described two radio-frequency antenna unit is 54mm.
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| CN2012200214011U CN202444053U (en) | 2012-01-17 | 2012-01-17 | Double-frequency paster antenna unit and radio frequency antenna system applied in wireless local area network |
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| CN2012200214011U CN202444053U (en) | 2012-01-17 | 2012-01-17 | Double-frequency paster antenna unit and radio frequency antenna system applied in wireless local area network |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102570019A (en) * | 2012-01-17 | 2012-07-11 | 上海大亚科技有限公司 | Surface-mounted radio-frequency antenna unit supporting double frequency and corresponding radio-frequency antenna system |
| CN105406181A (en) * | 2015-12-04 | 2016-03-16 | 福建星网锐捷网络有限公司 | Monopole antenna and multi-input-multiple-output antenna |
| CN108767468A (en) * | 2018-06-20 | 2018-11-06 | 袁涛 | Frequency is adjustable full-duplex antenna |
| CN110165395A (en) * | 2019-05-07 | 2019-08-23 | 电子科技大学 | A kind of three frequency-band antenna of miniaturized compact |
-
2012
- 2012-01-17 CN CN2012200214011U patent/CN202444053U/en not_active Withdrawn - After Issue
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102570019A (en) * | 2012-01-17 | 2012-07-11 | 上海大亚科技有限公司 | Surface-mounted radio-frequency antenna unit supporting double frequency and corresponding radio-frequency antenna system |
| CN105406181A (en) * | 2015-12-04 | 2016-03-16 | 福建星网锐捷网络有限公司 | Monopole antenna and multi-input-multiple-output antenna |
| CN108767468A (en) * | 2018-06-20 | 2018-11-06 | 袁涛 | Frequency is adjustable full-duplex antenna |
| CN108767468B (en) * | 2018-06-20 | 2020-10-16 | 袁涛 | Frequency adjustable full duplex antenna |
| CN110165395A (en) * | 2019-05-07 | 2019-08-23 | 电子科技大学 | A kind of three frequency-band antenna of miniaturized compact |
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