CN103346393A - Multi-frequency plane printed antenna comprising protruded floor and applied to mobile terminal - Google Patents
Multi-frequency plane printed antenna comprising protruded floor and applied to mobile terminal Download PDFInfo
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- CN103346393A CN103346393A CN2013102400466A CN201310240046A CN103346393A CN 103346393 A CN103346393 A CN 103346393A CN 2013102400466 A CN2013102400466 A CN 2013102400466A CN 201310240046 A CN201310240046 A CN 201310240046A CN 103346393 A CN103346393 A CN 103346393A
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Abstract
The invention discloses a multi-frequency plane printed antenna comprising a protruded floor and applied to a mobile terminal and belongs to the technical field of mobile terminal antennas. The multi-frequency plane printed antenna is characterized in that two resonance structures, namely a simulation branch and a parasitism land branch are utilized to select and combine all resonance modes which are simulated so as to obtain broadband and multi-frequency characteristics. A coaxial probe feeding manner is utilized to improve the reliability of test results, and impedance matching is performed by loading an adjusting piece. In addition, with the protruded floor structure, under the condition that acceptable antenna performance is ensured, placing spaces are provided for electronic equipment such as a camera, a loudspeaker, a data interface, a power supply and an earphone interface, wherein the electronic equipment possibly needs to be placed. The area of a clearance zone occupied by the multi-frequency plane printed antenna on a circuit board is only 15mm*28.3mm, a -6dB impedance bandwidth of the multi-frequency plane printed antenna can effectively cover work frequency bands of GSM 850, GSM 900, DCS, PCS, UMTS, LTE 2300, 2.4-GHz WLAN, LTE 2500 and the like.
Description
Technical field
The invention belongs to the Impact multiband antenna design field, relate to a kind of multi-frequency plane antenna that protrudes the floor that contains that is applied on the double-deck pcb board of being printed on of portable terminal.
Background technology
Be accompanied by the fast development of mobile communication, portable terminal requires to possess abundanter business function and more graceful appearance design, simultaneously, realize global roaming, need satisfy the frequency range demand of different regions different communication protocol, therefore, the antenna that is applied to portable terminal need cover communications band as much as possible under size-constrained situation.Existing WWAN(Wireless Wide Area Network) the system requirements antenna covers GSM850(824-894MHz), GSM900(880-960MHz), DCS(17101-880MHz), PCS(1850-1990MHz), UMTS(1920-2170MHz) etc. communications band.Realize ubiquitous Wi-Fi (Wireless Internet Access), antenna also needs to cover WLAN(Wireless Local Area Network) frequency range.Than the WWAN system, LTE(Long Term Evolution) system has higher data rate and spectrum efficiency, so the LTE technology can provide the better wideband multimedia service than WWAN system.The design requirement that requires to cover the LTE/WWAN working frequency range has proposed huge challenge to the multifrequency antenna design that is applied to portable terminal, and has attracted a large amount of scholars' concern and research.
At present, for the antenna that is applied to portable terminal, realize multifrequency, wideband operating characteristic, mainly by encouraging new mode of operation to increase resonance band to the additional parasitic element in primary radiation unit, perhaps utilize the multimode resonance characteristic of loop antenna etc., by optimizing antenna structure, each enabled mode is selected, made up, realize the expansion of bandwidth of operation.In addition, reconfigurable antenna can switch by switch selects different mode of operations, with the adjusting of realization to operating frequency, thus the multifrequency covering power of acquisition antenna bandwidth of operation.Yet the loop antenna that is applied to portable terminal generally will occupy whole upper edge or the lower edge of circuit board, and this brings inconvenience for the design of data-interface, power supply and the receiver J-Horner etc. of terminal equipment.Though the restructural technology can cover for the frequency of antenna the selection degree of freedom is provided, but need be switch switched design biasing circuit, lamped element such as the patch capacitor of Yin Ruing, inductance and switch element itself all can make the loss of antenna system increase inevitably thus, thereby antenna efficiency is reduced.
In submit applications on April 10th, 2013, application number is that 201310122067.8 patent of invention has proposed a used for mobile terminal planar printed-antenna that headroom district area and multiband cover of taking into account, and has realized LTE700(704-787MHz), effective covering of frequency ranges such as GSM850, GSM900, DCS, PCS, UMTS, LTE2300, LTE2500.The board area that this antenna occupies is 20 * 28mm
2, residual area is 20 * 32mm
2The headroom district do not utilize.If in remaining headroom district, lay electronic equipment, especially comprise the electronic device of metal part, the performance of antenna has certain deterioration inevitably.In order to weaken this influence, realize under the prerequisite of as far as possible little antenna area occupied that simultaneously wideer bandwidth covers, the present invention proposes use in conjunction excitation branch and parasitic branch and have the compact design structure of protruding the floor.The present invention adopts in design and has plate structure projectedly, under the situation that guarantees acceptable antenna performance, can be the electronic equipment that possible need, as digital camera, loud speaker, data-interface, power supply and receiver J-Horner etc., reserve and lay required space.Headroom district area on the circuit board that this antenna occupies only is 15 * 28.3mm
2Its actual measurement-6dB impedance bandwidth reaches 197MHz(775-972MHz in low-frequency range), reach 1230MHz(1699-2929MHz at high band), can effectively cover GSM850, GSM900, DCS, PCS, UMTS, LTE2300(2300-2400MHz), 2.4-GHz WLAN(2400-2484MHz), LTE2500(2500-2690MHz) etc. working frequency range.
Summary of the invention
The present invention is directed to wide-band mobile communication of future generation to miniaturization and the multiband covering demand of mobile terminal antenna, considered to contain the electronic component of metal part simultaneously to the influence of antenna performance, designed a multi-frequency plane printed antenna that protrudes the floor that contains.The headroom district area that this antenna takies only is 15mm * 28.3mm, and the multiband of having taken into account frequency ranges such as comprising GSM850, GSM900, DCS, PCS, UMTS, 2.4-GHz WLAN, LTE2300, LTE2500 simultaneously covers.
The invention is characterized in, contain: dielectric-slab, main floor, protrude floor, feeder line, excitation branch and branch autoeciously, wherein:
Dielectric-slab is of a size of 115mm * 60mm * 0.8mm;
Main floor is positioned at the below at the described dielectric-slab back side, is of a size of 100mm * 60mm, is used for circuit part in the analog circuit board;
The protrusion floor is printed on the back side of described dielectric-slab, be positioned at the upper right side on described main floor, and link to each other with described main floor, be of a size of 15mm * 31.7mm, can be used for laying the electronic equipment that may need, as digital camera, loud speaker, data-interface, power supply and receiver J-Horner etc.;
Feeder line, the use characteristic impedance is the coaxial line of 50 Ω, adopt the coaxial probe mode, antenna element is carried out feed, described coaxial line comprises outer conductor and inner wire, in, be separated with dielectric between the outer conductor, the cylinder of described coaxial outer conductor is welded on the described main floor, described coaxial inner conductor is by non-heavy copper hole, be positioned at described dielectric-slab front with respect to upper edge, described main floor take back the position the distributing point place with the excitation branch link to each other, radio-frequency (RF) coaxial joint on the side on the other end of described coaxial line and long limit, the right side that is positioned at described dielectric-slab links to each other, here do not adopt microstrip-fed mode, be because long limit, the left side of the close described dielectric-slab of described distributing point, if adopt microstrip-fed mode, described feeder line vertically part will close on long limit, described dielectric-slab left side, and encourage higher modes under near the heavy current distribution effect the edge, left side, described main floor, described feeder line can not be regarded the ideal 50 Ω microstrip lines of propagating accurate TEM ripple again as, and then influences reliability of testing result;
The excitation branch comprises the sub-branch of folded monopole and rectangle adjustment sheet, wherein:
The sub-branch of folded monopole, be printed on described dielectric-slab front, fall L shaped branch part by first from bottom to up, the first vertical branch part and S shape branch partly connect to form, wherein said first falls L shaped branch partly links to each other with described feeder line by described distributing point, described first width that falls L shaped branch vertical part partly is set to 1.5mm, the terminal width of described S shape branch part is 2mm, so that at height, low-frequency range obtains best bandwidth performance simultaneously, described first width that falls L shaped branch part and described S shape branch remainder partly is 0.5mm, the described first vertical branch partly falls L shaped branch part and described S shape branch part branch with described first and links to each other, its width is 0.5mm
The rectangle adjustment sheet flatly is connected described first downside of horizontal metal band that falls L shaped branch part, is of a size of 1mm * 8.5mm;
Autoeciously the branch, be printed on the top on described main floor, the left side on described protrusion floor, and overlap mutually across described dielectric-slab with described rectangle adjustment sheet, link to each other with described main floor at the take over earth point place of position of overlapping part, comprise that second falls L shaped branch part, the second vertical branch part, U-shaped branch part, the 3rd vertical branch partly and the 3rd fall L shaped branch part, this five part is continuous in turn from bottom to top, wherein:
Described second falls L shaped branch part, the described the 3rd vertical branch part and the described the 3rd falls L shaped branch metal tape width partly and is 0.5mm,
The metal tape width of the described second vertical branch part and described U-shaped branch part need require to choose optimal value according to coupling in the band, is set at 1mm and 0.3mm in the design respectively.
The present invention has taken into account width mobile communication of future generation to miniaturization and the multiband covering requirement of mobile terminal antenna, adopt planar structure, reduced the processing and fabricating cost, simultaneously, by adopting plate structure projectedly, under the situation that guarantees acceptable antenna performance, for the electronic equipments such as camera, loud speaker, data-interface, power supply and receiver J-Horner that may need to settle provide placement space.
Description of drawings
Fig. 1 is a kind of structure chart (the dielectric-slab front metal represents that with black the dielectric-slab back metal is represented with the ordinate striped) that is applied to the multi-frequency plane printed antenna that containing of portable terminal protrude the floor provided by the invention.
Fig. 2 is the detailed functions structure chart (dielectric-slab front metal edge represents that with solid line dielectric-slab back metal edge dots) of planar printed-antenna shown in Figure 1.
Fig. 3 is millimeter (mm) for the enforcement dimensional drawing (the dielectric-slab front metal represents that with black the dielectric-slab back metal is represented with the ordinate striped) of the front view of planar printed-antenna shown in Figure 1, unit.
Fig. 4 is millimeter (mm) for the enforcement dimensional drawing (the dielectric-slab front metal represents that with black the dielectric-slab back metal represents that with the ordinate striped coaxial line is represented with grid line) of the rearview of planar printed-antenna shown in Figure 1, unit.
Fig. 5 is the enforcement dimensional drawing of the end view of planar printed-antenna shown in Figure 1, and unit is millimeter (mm).
Fig. 6 is the return loss survey map (S11) of the planar printed-antenna in Fig. 1-embodiment shown in Figure 5.
Fig. 7 is the actual measurement antenna pattern of the planar printed-antenna in Fig. 1-embodiment shown in Figure 5 when being operated in 860MHz: 7(a) X-Y plane; 7(b) X-Z plane; 7(c) the Y-Z plane (-: θ component power gain directional diagram;---:
Component power gain directional diagram).
Fig. 8 is the actual measurement antenna pattern of the planar printed-antenna in Fig. 1-embodiment shown in Figure 5 when being operated in 920MHz: 8(a) X-Y plane; 8(b) X-Z plane; 8(c) the Y-Z plane (-: θ component power gain directional diagram;---:
Component power gain directional diagram).
Fig. 9 is the actual measurement antenna pattern of the planar printed-antenna in Fig. 1-embodiment shown in Figure 5 when being operated in 1940MHz: 9(a) X-Y plane; 9(b) X-Z plane; 9(c) the Y-Z plane (-: θ component power gain directional diagram;---:
Component power gain directional diagram).
Figure 10 is the actual measurement antenna pattern of the planar printed-antenna in Fig. 1-embodiment shown in Figure 5 when being operated in 2350MHz: 10(a) X-Y plane; 10(b) X-Z plane; 10(c) the Y-Z plane (-: θ component power gain directional diagram;---:
Component power gain directional diagram).
Figure 11 is the actual measurement antenna pattern of the planar printed-antenna in Fig. 1-embodiment shown in Figure 5 when being operated in 2600MHz: 11(a) X-Y plane; 11(b) X-Z plane; 11(c) the Y-Z plane (-: θ component power gain directional diagram;---:
Component power gain directional diagram).
Sign in the accompanying drawing is described as follows:
0 is dielectric-slab; 1 for being printed on the main floor at the dielectric-slab back side; 2 for being printed on the protrusion floor at the dielectric-slab back side; 3 for being printed on the excitation branch in dielectric-slab front; 31 first fall L shaped branch part for what excitation linked to each other with distributing point in the apparatus derivatorius; 32 are the first vertical branch part in the excitation apparatus derivatorius; 33 are the S shape branch part in the excitation apparatus derivatorius; 34 is the rectangle adjustment sheet that being used in the excitation apparatus derivatorius carries out impedance matching; 4 for being printed on the branch autoeciously at the dielectric-slab back side; 41 for falling L shaped branch part second of the linking to each other with earth point in the structure of branch autoeciously; 42 is the second vertical branch part of branch in the structure autoeciously; 43 is the U-shaped branch part of branch in the structure autoeciously; 44 is the three vertical branch part of branch in the structure autoeciously; 45 fall L shaped branch part for branch the 3rd in structure autoeciously; 5 is the radio-frequency (RF) coaxial joint; 6 is the coaxial line as feeder line; 7 for being used for coaxial inner conductor is guided to the non-heavy copper hole of dielectric-slab upper surface; 8 is distributing point; 9 is earth point.
Embodiment
The invention provides a kind of portable terminal that is applied to and contain the multi-frequency plane printed antenna that protrudes the floor, specific embodiments is as follows:
Adopt double layer printed circuit plate technology that this planar printed-antenna each several part structure is printed on the dielectric-slab 0.Be printed on dielectric-slab 0 back side and be used for circuit part in the analog circuit board in the main floor 1 of position on the lower side.Be printed on the back side of dielectric-slab 0, be positioned at the upper right side on main floor 1 and the protrusion floor 2 that links to each other with main floor 1, be the electronic equipment that possible need, provide as digital camera, loud speaker, data-interface, power supply and receiver J-Horner etc. and laid the space.The antenna body part is made up of the excitation branch 3 that is printed on dielectric-slab 0 front and the branch 4 autoeciously that is printed on dielectric-slab 0 back side.Comprise two resonance points in the low-frequency range bandwidth of operation of antenna: first and second resonance points comprise four resonance points in the high band operation bandwidth: three, the 4th, the 5th and the 6th resonance point.In low-frequency range, when the same day, line was operated in the resonance frequency of first resonance point, the quarter-wave resonance pattern that has been energized on the branch 4 played a leading role to radiation field autoeciously; When the same day, line was operated in the resonance frequency of second resonance point, the quarter-wave resonance pattern that has been energized on the excitation branch 3 played a leading role to radiation field.At high band, when the same day, line was operated in the resonance frequency of the 3rd resonance point, all encouraged four/three-wavelength mode of resonance on excitation branch 3 and the parasitic branch 4; When the same day, line was operated in the resonance frequency of the 4th resonance point, four/three-wavelength mode of resonance and 5/4ths wave resonance patterns have been encouraged respectively on excitation branch 3 and the parasitic branch 4; When the same day, line was operated in the resonance frequency of the 5th resonance point, four/three-wavelength mode of resonance and 7/4ths wave resonance patterns have been encouraged respectively on excitation branch 3 and the parasitic branch 4; When the same day, line was operated in the resonance frequency of the 6th resonance point, 5/4ths wave resonance patterns and 7/4ths wave resonance patterns have been encouraged respectively on excitation branch 3 and the parasitic branch 4.Excitation branch 3 comprise link to each other with distributing point 8 first fall L shaped branch part 31, the first vertical branch part 32, S shape branch part 33 and rectangle adjustment sheet 34.Can realize adjusting to the resonance frequency of second resonance point by the size that changes the terminal sheet metal of S shape branch part, and can not produce considerable influence to the resonance frequency of first resonance point, can produce certain influence to bandwidth and the matching properties of high band operation frequency band simultaneously.Position and the size of choose reasonable rectangle adjustment sheet 34 can be optimized the matching properties of high band operation frequency band, can not produce appreciable impact to the bandwidth performance of low-frequency range working band simultaneously.Branch 4 comprises second falling L shaped branch part 41, the second vertical branch part 42, U-shaped branch part 43, the 3rd vertical branch part 44 and the 3rd and fall L shaped branch part 45 of linking to each other with earth point 9 autoeciously.What change linked to each other with earth point 9 second falls the length of L shaped branch part 41 on the y direction, namely select different positions for earth point 9, can regulate the resonance frequency of each resonance point except second resonance point, and the matching performance of high band operation frequency band is produced appreciable impact.For the second vertical branch part 42, select different width, can regulate the matching performance of high and low frequency range working band simultaneously.For simplified design, the second vertical branch part 42 is consistent with the spacing of protruding floor 2 with the spacing of protruding floor 2 and the 3rd vertical branch part 44.Reduce the size of this spacing, can drag down the resonance frequency of each resonance point.For U-shaped branch part 43, select different width, can under the situation that does not influence high band operation band bandwidth performance, by changing the resonance frequency of first resonance point, realize the adjusting to low-frequency range working band bandwidth performance.Can realize adjusting to the resonance frequency of first resonance point by changing the 3rd length of terminal metal tape of falling L shaped branch part 45, and can not produce considerable influence to the resonance frequency of second resonance point, can produce certain influence to resonance frequency and the matching properties of each resonance point except the 6th resonance point in the high band operation frequency band simultaneously.Comprehensive each structural parameters are to beamwidth of antenna Effect on Performance, and carry out combined optimization, can obtain to cover the antenna structure of frequency ranges such as GSM850, GSM900, DCS, PCS, UMTS, LTE2300,2.4-GHz WLAN and LTE2500.
Feeding classification adopts the coaxial probe feed.By non-heavy copper hole 7 inner wire of coaxial line 6 is guided to dielectric-slab 0 upper surface, and link to each other with excitation branch 3 at distributing point 8 places.Radio-frequency (RF) coaxial joint 5 on the side on the other end of coaxial line 6 and long limit, the right side that is positioned at dielectric-slab links to each other.
In order to verify the present invention program's validity, provide instantiation below and describe.
In this embodiment, select that relative dielectric constant is 4.4 for use, loss angle tangent is 0.02, thickness is the FR4 medium substrate of 0.8mm, the size of planar printed-antenna each several part structure as shown in Figure 3-Figure 5, the unit of all sizes is millimeter (mm) among each figure.
The measured result of the return loss (S11) of the planar printed-antenna made from Fig. 3-shown in Figure 5 size as shown in Figure 6.As shown in Figure 6, this planar printed-antenna-6dB impedance bandwidth reaches 197MHz(775-972MHz in low-frequency range), reach 1230MHz(1699-2929MHz at high band), can effectively cover a plurality of frequency bands such as GSM850, GSM900, DCS, PCS, UMTS, LTE2300,2.4-GHz WLAN and LTE2500.Fig. 7-Figure 11 has provided the actual measurement antenna pattern on X-Y plane when embodiment midplane printed antenna is operated in 860MHz, 920MHz, 1940MHz, 2350MHz and 2600MHz respectively, X-Z plane, Y-Z plane.By Fig. 7-Figure 11 as can be known, the antenna pattern of embodiment midplane printed antenna is typical dipole radiation directional diagram form in low-frequency range (860MHz, 920MHz), (1940MHz, 2350MHz and 2600MHz) has certain directivity at high band, and keeps similar pattern shapes respectively in high and low frequency range.When embodiment midplane printed antenna is operated in 860MHz, 920MHz, 1940MHz, 2350MHz and 2600MHz respectively, the maximum gain test result of antenna on three primary flats (X-Y plane, X-Z plane and Y-Z plane) reaches 0.34dBi, 0.20dBi, 2.11dBi, 3.06dBi and 4.84dBi respectively, satisfies mobile communication system to the design requirement of the Impact multiband antenna that is used for portable terminal.
Claims (1)
1. one kind is applied to containing of portable terminal and protrudes the multi-frequency plane printed antenna on floor (2), it is characterized in that, contains: dielectric-slab (0), main floor (1), protrude floor (2), feeder line, excitation branch (3) and (4) autoeciously, wherein:
Dielectric-slab (0) is of a size of 115mm * 60mm * 0.8mm;
Main floor (1) is printed on the below at described dielectric-slab (0) back side, is of a size of 100mm * 60mm, is used for circuit part in the analog circuit board;
Protrusion floor (2) is printed on the back side of described dielectric-slab (0), is positioned at the upper right side on described main floor (1), and links to each other with described main floor (1), is of a size of 15mm * 31.7mm, constitutes the indwelling space of used for mobile terminal electronic unit;
Feeder line, the use characteristic impedance is the coaxial line (6) of 50 Ω, adopt the coaxial probe mode, antenna element is carried out feed, described coaxial line (6) comprises outer conductor and inner wire, in, be separated with dielectric between the outer conductor, the cylinder of described coaxial line (6) outer conductor is welded on the described main floor (1), described coaxial line (6) inner wire is by non-heavy copper hole (7), be positioned at described dielectric-slab (0) positive locate to link to each other with encouraging branch (3) with respect to the take back distributing point (8) of position of upper edge, described main floor (1), the radio-frequency (RF) coaxial joint (5) that the other end of described coaxial line (6) and the right side that is positioned at described dielectric-slab (0) are grown on the side on limit links to each other;
Excitation branch (3) comprises the sub-branch of folded monopole and rectangle adjustment sheet (34), wherein:
The sub-branch of folded monopole, be printed on described dielectric-slab (0) front, fall L shaped branch part (31) by first from bottom to up, the first vertical branch part (32) and S shape branch part (33) connect to form, wherein said first falls L shaped branch part (31) links to each other with described feeder line by described distributing point (8), described first width of vertical part that falls L shaped branch part (31) is set to 1.5mm, the terminal width of described S shape branch part (33) is 2mm, so that at height, low-frequency range obtains best bandwidth performance simultaneously, described first fall L shaped branch part (31) and described S shape branch partly the width of the remainder of (33) be 0.5mm, described first vertical branch part (32) will described first fall L shaped branch part (31) and described S shape branch partly (33) link to each other, its width is 0.5mm
Rectangle adjustment sheet (34) flatly is connected described first downside of horizontal metal band that falls L shaped branch part (31), is of a size of 1mm * 8.5mm;
(4) autoeciously, be printed on the top on described main floor (1), the left side on described protrusion floor (2), and overlap mutually across described dielectric-slab (0) with described rectangle adjustment sheet (34), locate to link to each other with described main floor (1) at the take over earth point (9) of position of overlapping part, comprise that second falls L shaped branch part (41), the second vertical branch part (42), U-shaped branch part (43), the 3rd vertical branch partly (44) and the 3rd L shaped branch partly (45) falls, this five part links to each other from bottom to top in turn, wherein:
Described second fall L shaped branch part (41), the described the 3rd vertical branch part (44) and the described the 3rd fall L shaped branch partly the metal tape width of (45) be 0.5mm,
The metal tape width of the described second vertical branch part (42) and described U-shaped branch part (43) need require to choose optimal value according to coupling in the band, is set at 1mm and 0.3mm in the design respectively.
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| CN201310240046.6A CN103346393B (en) | 2013-06-17 | 2013-06-17 | A kind of multi-frequency plane printed antenna containing protrusion floor being applied to mobile terminal |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104134857A (en) * | 2014-08-01 | 2014-11-05 | 清华大学 | Eight-frequency-band plane printing mobile phone antenna |
| CN104617379A (en) * | 2013-11-04 | 2015-05-13 | 广达电脑股份有限公司 | Antenna structure |
| CN105655693A (en) * | 2016-01-06 | 2016-06-08 | 苏州国质信网络通讯有限公司 | Design method of double low frequency resonance LTE antenna |
| CN105789901A (en) * | 2016-03-07 | 2016-07-20 | 清华大学 | Multi-band antenna free of lumped parameter element for high-screen ratio mobile terminal |
| CN105846069A (en) * | 2016-04-08 | 2016-08-10 | 中南大学 | Multi-band MIMO cell phone antenna with simple decoupling structure |
| CN108417970A (en) * | 2018-02-28 | 2018-08-17 | 深圳创维无线技术有限公司 | Multifrequency built-in aerial and wireless terminal |
| CN112838359A (en) * | 2019-11-25 | 2021-05-25 | 东友精细化工有限公司 | Antenna device and display device |
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| CN102709685A (en) * | 2012-04-20 | 2012-10-03 | 广东步步高电子工业有限公司 | Penta band antenna of PCB (printed circuit board) |
| CN103151607A (en) * | 2013-03-01 | 2013-06-12 | 清华大学 | Broadband double antenna system for mobile terminal, and decoupling method of broadband double antenna system |
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| CN102437417A (en) * | 2011-08-24 | 2012-05-02 | 清华大学 | Three-dimensional dual-antenna system for mobile terminal |
| CN102709685A (en) * | 2012-04-20 | 2012-10-03 | 广东步步高电子工业有限公司 | Penta band antenna of PCB (printed circuit board) |
| CN103151607A (en) * | 2013-03-01 | 2013-06-12 | 清华大学 | Broadband double antenna system for mobile terminal, and decoupling method of broadband double antenna system |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104617379A (en) * | 2013-11-04 | 2015-05-13 | 广达电脑股份有限公司 | Antenna structure |
| CN104134857A (en) * | 2014-08-01 | 2014-11-05 | 清华大学 | Eight-frequency-band plane printing mobile phone antenna |
| CN104134857B (en) * | 2014-08-01 | 2016-05-18 | 清华大学 | A kind of eight frequency range planographic antenna for mobile phone |
| CN105655693A (en) * | 2016-01-06 | 2016-06-08 | 苏州国质信网络通讯有限公司 | Design method of double low frequency resonance LTE antenna |
| CN105789901A (en) * | 2016-03-07 | 2016-07-20 | 清华大学 | Multi-band antenna free of lumped parameter element for high-screen ratio mobile terminal |
| CN105789901B (en) * | 2016-03-07 | 2018-08-28 | 清华大学 | No lumped-parameter element is for the high multiband aerial for shielding accounting mobile terminal |
| CN105846069A (en) * | 2016-04-08 | 2016-08-10 | 中南大学 | Multi-band MIMO cell phone antenna with simple decoupling structure |
| CN108417970A (en) * | 2018-02-28 | 2018-08-17 | 深圳创维无线技术有限公司 | Multifrequency built-in aerial and wireless terminal |
| CN112838359A (en) * | 2019-11-25 | 2021-05-25 | 东友精细化工有限公司 | Antenna device and display device |
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| CN103346393B (en) | 2015-08-12 |
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