CN104425874A - Antenna and electronic device - Google Patents
Antenna and electronic device Download PDFInfo
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- CN104425874A CN104425874A CN201310409934.6A CN201310409934A CN104425874A CN 104425874 A CN104425874 A CN 104425874A CN 201310409934 A CN201310409934 A CN 201310409934A CN 104425874 A CN104425874 A CN 104425874A
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Abstract
The invention relates to an antenna and an electronic device. The antenna is applied to the electronic device and comprises a grounded plate, a metal sheet, a feed-in assembly and a short circuit wall, wherein the grounded plate is used for grounding; the shape of the metal sheet approximately corresponds to a rectangle, and a first corner of the rectangle is provided with a first chamfering; the feed-in assembly is electrically connected with a second corner of the metal sheet relative to the rectangle and is used for transferring electromagnetic energy, and the second corner is adjacent to the first corner; the short circuit wall is electrically connected with the grounded plate and a first side of the metal sheet so that the grounded plate and the metal sheet form a resonant cavity therebetween, the first side is opposite to a second side of the metal sheet, and the second side is adjacent to the first corner and the second corner; the length and the width of the rectangle corresponding to the metal sheet are respectively relative to a frequency range of at least one working frequency band of the antenna, and the first chamfering of the metal sheet is used for increasing the frequency range of a first frequency band of the at least one working frequency band. The antenna and the electronic device have the advantages of a broad band, multiple frequency bands, small size and high efficiency.
Description
Technical field
The present invention relates to a kind of antenna and electronic installation, espespecially a kind of antenna and electronic installation with features such as broadband, multiband or wide-band, small size, high efficiency.
Background technology
Antenna is used for launching or receiving radio wave, to transmit or to exchange radio signal.Generally there is the electronic product of radio communication function, as notebook computer, personal digital assistant (Personal Digital Assistant) etc., usually visit wireless network by built-in antenna.Therefore, in order to allow user can access wireless communication network more easily, the bandwidth of ideal antenna should increase as much as possible in tolerance band, and size then should reduce as far as possible, to coordinate the trend of portable wireless communication equipment volume-diminished, by aerial integration in portable wireless communication equipment.In addition, along with the evolution of wireless communication technology, the operating frequency of different wireless communication system may be different, and therefore, desirable antenna should be able to contain frequency band needed for different wireless communication networking with single antenna.
In known technology, apply for multifrequency, common mode utilizes multiple antenna or multiple radiant body (as the slotted eye of slot antenna, the branch etc. of dipole antenna), receive and dispatch the wireless signal of different frequency range respectively, design complexities is caused to increase, more seriously, along with the increase of required frequency range, the overall dimensions of antenna also can and then increase.If antenna can installation space comparatively limited, even may cause inter-antenna interference, thus affect the normal operation of antenna.Therefore, how under limited areal, provide the antenna being applicable to multifrequency application, also just become one of target that industry makes great efforts.
Therefore, need to provide a kind of antenna and electronic installation to meet the demand.
Summary of the invention
Therefore, namely main purpose of the present invention is to provide a kind of antenna and electronic installation, and it under limited areal, can reach multifrequency or wideband operation.
The present invention discloses a kind of antenna, and this antenna is used for an electronic installation, and this antenna comprises: a ground plate, and this ground plate is used to provide ground connection; One sheet metal, the shape of this sheet metal roughly corresponds to a rectangle, and is formed with one first rescinded angle at this rectangle one first jiao; One feed-in assembly, this feed-in assembly is electrically connected at this sheet metal relative to one second jiao of this rectangle, and be used for transmitting electromagnetic energy, this second jiao adjacent to this first jiao; And a short circuit wall, this short circuit wall is electrically connected one first limit of this ground plate and this sheet metal, make to form a resonant cavity between this ground plate and this sheet metal, this first limit is the opposite side of a Second Edge of this sheet metal, and this Second Edge is adjacent to this first jiao and this second jiao; Wherein, a length of this rectangle corresponding to this sheet metal and a width are relevant to the frequency range of at least one working frequency range of this antenna respectively, and this first rescinded angle of this sheet metal is used for increasing the frequency range of one first frequency range in this at least one working frequency range.
The present invention also discloses a kind of electronic installation, and this electronic installation comprises: a running circuit; One metal shell, this metal shell this running circuit coated, and be formed with a window; And an antenna, this antenna to be located in this metal shell and this window contiguous, and this antenna comprises: a ground plate, and this ground plate is used to provide ground connection, and this ground plate is electrically connected at this metal shell; One sheet metal, the shape of this sheet metal roughly corresponds to a rectangle, and is formed with one first rescinded angle at this rectangle one first jiao; One feed-in assembly, this feed-in assembly is electrically connected at this sheet metal relative to one second jiao of this rectangle, and be used for transmitting electromagnetic energy between this running circuit and this sheet metal, this second jiao adjacent to this first jiao; And a short circuit wall, this short circuit wall is electrically connected one first limit of this ground plate and this sheet metal, make to form a resonant cavity between this ground plate and this sheet metal, this first limit is the opposite side of a Second Edge of this sheet metal, and this Second Edge is adjacent to this first jiao and this second jiao; Wherein, a length of this rectangle corresponding to this sheet metal and a width are relevant to the frequency range of at least one working frequency range of this antenna respectively, and this first rescinded angle of this sheet metal is used for increasing the frequency range of one first frequency range in this at least one working frequency range.
Antenna of the present invention can have the advantages such as broadband, multiband, small size, high efficiency.
Accompanying drawing explanation
Figure 1A to Fig. 1 D be respectively an antenna of embodiments of the invention etc. visual angle, side, front and the back side schematic diagram.
Fig. 2 A is the schematic diagram of the paster antenna of a central feed-in.
Fig. 2 B is the schematic diagram of the paster antenna of an asymmetric feed-in.
Fig. 2 C, Fig. 2 D are the direction of an electric field schematic diagram of the paster antenna of Fig. 2 B.
Fig. 2 E is a schematic diagram with the paster antenna of short circuit wall.
Fig. 3 A is the distribution schematic diagram of the surface field vector of Antenna Operation when low frequency frequency range of Figure 1A.
Fig. 3 B, Fig. 3 C are the distribution schematic diagram of the surface field vector of Antenna Operation when high-frequency band of Figure 1A.
Fig. 4 A to Fig. 4 D is the schematic diagram of the antenna of different embodiments of the invention.
Fig. 5 A and Fig. 5 B be an antenna of embodiments of the invention etc. the schematic diagram in visual angle and front.
Fig. 5 C is the voltage standing wave ratio schematic diagram of the antenna of Fig. 5 A.
Fig. 6 A to Fig. 6 C is the voltage standing wave ratio of the antenna of Fig. 5 A, antenna efficiency and field pattern schematic diagram.
Fig. 7 A to Fig. 7 C is the voltage standing wave ratio of the antenna of Fig. 5 A, antenna efficiency and field pattern schematic diagram.
Fig. 8 A, Fig. 8 B are front and the partial cutaway schematic view of an integrated computer system.
Fig. 9 is the schematic diagram of a notebook computer.
Figure 10 A, Figure 10 B are a schematic diagram with two kinds of operator schemes of the notebook computer of flat computer function.
Figure 11 A to Figure 11 E is the voltage standing wave ratio of antenna applications in the notebook computer gained of Figure 10 A, Figure 10 B of Fig. 5 A, antenna efficiency and field pattern schematic diagram.
Figure 12 A to Figure 12 C is the schematic diagram of the different embodiments of a fixture in the antenna of Figure 1A.
Primary clustering symbol description:
Embodiment
Please refer to Figure 1A to Fig. 1 D, Figure 1A to Fig. 1 D be respectively an antenna 10 of embodiments of the invention etc. visual angle, side, front and the back side schematic diagram, wherein and be labeled with the coordinate system of X, Y, Z axis, with display view angle position.Antenna 10 can be used for having the portable electron device of radio communication function to receive and dispatch the wireless signal of at least one frequency range, as notebook computer, personal digital assistant (Personal Digital Assistant) etc., but not as limit.Antenna 10 includes ground plate 102, sheet metal 104, feed-in assembly 106, short circuit wall 108 and a fixture 110.Ground plate 102 is used to provide ground connection (being namely linked to the ground end of portable electron device), and it includes one first block 1020 and one second block 1022, and has an angle between the two
in this embodiment, angle
the mechanism design of portable electron device can be coordinated.Sheet metal 104 can be arranged in pairs or groups ground plate 102 and carry out transmitting or the reception of wireless signal, and from Figure 1A, Fig. 1 C, clip for one jiao that the shape of sheet metal 104 can be considered a length to be L_rt, width is the rectangle of W_rt, or the rectangle that to be considered as length be L_rt, width is W_rt clips the right-angled triangle that a drift angle is θ.In addition, from Figure 1B, sheet metal 104 is roughly positioned on the first block 1020 of ground plate 102, that is is seen it (as shown in Figure 1 C) by front, and sheet metal 104 and the first block 1020 partly overlap.Feed-in assembly 106 is electrically connected at one jiao of sheet metal 104, is used for transmitting electromagnetic energy, and this angle is adjacent to rescinded angle; In other words, antenna 10 is with asymmetric manner FD feed.Short circuit wall 108 is electrically connected at sheet metal 104 and the side of ground plate 102, make to form a resonant cavity between ground plate 102 and sheet metal 104, and the length of short circuit wall 108 is L_sw, is highly H1.In addition, fixture 110 can be made up of plastics or other non-conductive materials, and it can the relative position of fixing metal sheet 104 and ground plate 102, makes sheet metal 104 relative to the another side of short circuit wall 108 and ground plate 102 apart from a height H 2.
From the above, the framework of antenna 10 is similar to a paster antenna (Patch Antenna), but it has the part such as asymmetric feed-in, short circuit wall, rescinded angle and different from conventional patch antenna, will sequentially be described for the operation principles of antenna 10 below.
First, as previously mentioned, feed-in assembly 106 is electrically connected at one jiao of sheet metal 104, and reaches asymmetric manner FD feed.Traditionally, as shown in Figure 2 A, a paster antenna 20 adopts central authorities' (symmetry) feed-in, and its length L_f1 is substantially equal to 1/2nd of the corresponding signal wavelength of frequency f 1, with the signal of transmitting-receiving frequency f1; In other words, conventional patch antenna 20 only can reach single frequency operation.By contrast, antenna 10 adopts asymmetric feed-in, related notion is as shown in a paster antenna 22 of Fig. 2 B, that is except control is except its length L_f1 is substantially equal to 1/2nd of the corresponding signal wavelength of frequency f 1, also control that its width L_f2 is substantially equal to the corresponding signal wavelength of frequency f 2 1/2nd; By this, paster antenna 22 may correspond to frequency f 1, f2 all produces resonance point in X-direction and Y-direction, i.e. as shown in Fig. 2 C, Fig. 2 D (arrow wherein represents direction of an electric field), thus can reach two-frequency operation.
Further, observe Fig. 2 D known, produce one at the center line of the Y-direction of paster antenna 22 and resonate zero point, if therefore by the center line conducting of Y-direction extremely, then the resonance work of Y-direction still can be maintained, and does not affect the original running of X-direction.Therefore, as shown in Figure 2 E, paster antenna 22 utilizes short circuit wall 26 conducting to ground by the center line of Y-direction by a paster antenna 24, and the width of paster antenna 24 can be made to be kept to L_f2/2.
From the above, by asymmetric feed-in, antenna 10 can reach two-frequency operation, and by short circuit wall 108, then width W _ the rt of antenna 10 can be made effectively to reduce.Therefore, if be applied as example with 2.4GHz, 5GHz frequency range of WLAN, then the length and width (L_rt, W_rt) of sheet metal 104 is relevant to high frequency (5GHz) resonant position and low frequency (2.4GHz) resonant position respectively; More precisely, the length L_rt of antenna 10 is roughly 1/2nd of the corresponding wavelength of high-frequency signal, and width W _ rt is roughly 1/4th of the corresponding wavelength of low frequency signal.It is to be noted, however, that the length L_sw by controlling short circuit wall 108, width W _ rt can further lower than 1/4th of the corresponding wavelength of low frequency signal.Specifically, the length L_sw of short circuit wall 108 can affect by load point (i.e. the tie point of feed-in assembly 106 and sheet metal 104) beeline extremely, is thus relevant to the centre frequency of low frequency.Therefore, when size-constrained, the length L_sw of short circuit wall 108 can be shortened, make load point be extended for W_dm to the beeline on ground by W_rt, that is determine the centre frequency of low frequency by distance W_dm.Thus, can reduce further width W _ rt be lower than the corresponding wavelength of low frequency signal 1/4th.
On the other hand, because the length L_rt of sheet metal 104 is relevant to high-frequency work, and for WLAN, its high-frequency band need contain the bandwidth of in 5GHz to 6GHz 1 18, in low frequency frequency range 2GHz to 3GHz 4 percent bandwidth.Therefore, the present invention utilizes rescinded angle mode further, and the length making sheet metal 104 wherein (namely connect the opposite side on one side of short circuit wall 108) is L_dm by L_rt linear narrowing, thus effectively can extend the scope of high-frequency work frequency range.That is, the rescinded angle of angle θ makes sheet metal 104 provide the length variations of L_rt to L_dm, thus provides multiple high-frequency path, and produces multiple mode.For example, please refer to Fig. 3 A to Fig. 3 C, Fig. 3 A is the distribution schematic diagram of antenna 10 surface field vector of sheet metal 104 when working in low frequency frequency range, and Fig. 3 B, Fig. 3 C are then the distribution schematic diagram of the surface field vector of sheet metal 104 when antenna 10 works in two high-frequency band.Wherein, arrow represents direction of an electric field, and its length representative relative intensity.From Fig. 3 B, Fig. 3 C, due to the change of sheet metal 104 length, sheet metal 104 can produce different mode in high-frequency band, can expand the scope of high-frequency band by this, to reach wideband operation.It is noted that Fig. 3 A to Fig. 3 C shows the electric field vector distribution in resonant cavity, in fact, electric field is still had to overflow by sheet metal edge is loose; But, in any case, the radiation direction of antenna 10 mainly towards the direction beyond ground plate 102, and not towards ground plate 102 radiation.
In addition, in antenna 10, feed-in assembly 106 is made with microstrip line, and it is preferably quarter-wave impedance transducer, as its name suggests, its length L_fd is roughly 1/4th of the wireless signal wavelength corresponding to low frequency frequency range, but physical length need be determined by the impedance point of sheet metal 104, therefore line length scope is between 3/1 to eight/8ths of the wireless signal wavelength corresponding to low frequency frequency range.Specifically, metal edge feed-in mode can cause resistance value quite large, and therefore the present invention utilizes Smith chart (Smith Chart) instrument by adjustment length L_fd, impedance point to be matched to about 50 ohm, by this to promote efficiency of transmission, and then improve radiation efficiency.
Conclude above-mentioned known, the antenna 10 of embodiments of the invention utilizes asymmetric feed-in, to excite two-frequency operation; Utilize short circuit wall 108, to reduce required width; Utilize rescinded angle structure, produce multiple mode at high frequency, to increase the scope of high-frequency band; And utilize quarter-wave impedance transducer, impedance point is matched to 50 ohm, to promote efficiency of transmission.
It is noted that antenna 10 is embodiments of the invention, those of ordinary skill in the art should do different modifications according to this, and is not limited thereto.For example, as shown in Figure 1B, height H 1 that height H 2 is greater than (short circuit wall 108), but be not limited thereto, both also can be equal; Generally speaking, height H 1 is larger with H2, and relative radiative efficiency is better, but still need be maintained within a certain range, and such as height lower limit must not be less than 2mm, radiation-curable in free space to guarantee the loose electric field that overflows between ground plate 102 and sheet metal 104.
In addition, as previously mentioned, the length L_sw of short circuit wall 108 is relevant to the centre frequency of low frequency, and can, by the length L_sw shortening short circuit wall 108, make width W _ rt be less than 1/4th of the corresponding wavelength of low frequency signal.For example, realize antenna 10 according to ironware, and be under the condition of air at medium, the quarter-wave of 2.4GHz is 31.25mm, shorten to increase low-frequency resonance path by short circuit wall 108, then width W _ rt can be made to be less than 10mm, that is reduce 68% compared to 31.25mm.It is to be noted, however, that in order to avoid the low frequency of excess destruction sheet metal 104 and high-frequency electric field distribution character, length L_sw can be set greater than 1/8th of the wireless signal wavelength corresponding to high-frequency band.
In addition, impedance point need be matched to except about 50 ohm except length by feed-in assembly 106, and its width or shape are then unlimited.For example, in antenna 10, the width of feed-in assembly 106 is wide (Uniform) form and comprises three bendings, but can also be gradual (Tapper), maybe can comprise more or lessly even not comprise bending.Wherein, it is noted that in order to avoid disturbing the loose electric field (fringing field) that overflows of sheet metal 104, feed-in assembly 106 should meet following condition with the distance L_gp of sheet metal 104:
L_gp>0.24λr+0.375*(H1+H2)；
Wherein, the wireless signal wavelength of λ r corresponding to low frequency frequency range.
On the other hand, in antenna 10, ground plate 102 is divided into the first block 1020 and the second block 1022, and it is for distinguishing in ground plate 102 by sheet metal 104(or resonant cavity) the part (i.e. the first block 1020) that hides and unsheltered part (i.e. the second block 1022); In fact, the first block 1020 and the second block 1022 can be the different piece of same sheet metal, also can be different metal sheet and are linked by electric connection mode.Only it is noted that due to the second block 1022 be the slotted eye opening direction of low frequency path, therefore the second block 1022 need adopt conductive material (as conducting resinl, conducting foam, welding material, Copper Foil auxiliary material) to hold with being connected to, to maintain loose field effect of overflowing; As for the first block 1020, it is positioned at immediately below resonant cavity, and due to skin depth effect, electromagnetic property is only in cavity, therefore the first block 1020 can adopt general insulation gum, and can not need to hold with being connected directly to.In addition, if the electronic installation applied has metal back cover or metal edge frame, then need to insert conductive material, as conducting foam (Gasket), the second block 1022 is conducted electricity to metal back cover or metal edge frame, to strengthen lower ground effect.In this case, metal back cover or metal edge frame can be avoided to have an impact to antenna performance, and then maintain good bandwidth, efficiency and field pattern.Meanwhile, as previously mentioned, the radiation direction of antenna 10 is mainly towards the direction beyond ground plate 102, and therefore, under the operational environment of metal back cover or metal edge frame, radiation efficiency can not be affected.
In addition, between the first block 1020 and sheet metal 104, maintain relative position by fixture 110, in other embodiments, if do not need fixture 110 can fix the first block 1020 and sheet metal 104, such as, by short circuit wall 108, then also can omit fixture 110.Moreover as shown in Figure 1B, the side of fixture 110 is trapezoidal, it designs for matching mechanism.In other embodiments, as shown in Figure 12 A to Figure 12 C, the side of fixture 110 also can be rectangular or have cambered surface, corner cut etc., depending on different application.Or fixture 110 also can be realized by one or more column, square, is not limited thereto.And selecting of material, only need to guarantee that fixture 110 is for isolation material, therefore be not limited to hard or soft.
In antenna 10, the rescinded angle of angle θ can make the length of sheet metal 104 produce the change of L_rt to L_dm, extends the scope of high-frequency work frequency range by this.Wherein, when for avoiding excessive influence low frequency path, angle θ can be limited between 0 degree and 30 degree, but is not limited thereto.In this case, those of ordinary skill in the art should needed for system, the shape of appropriateness adjustment angle θ or change rescinded angle, and is not limited to the example of Figure 1A, Fig. 1 C.For example, please refer to Fig. 4 A to Fig. 4 D, Fig. 4 A to Fig. 4 D is the schematic diagram of the antenna 40,42,44,46 of embodiments of the invention.The framework of antenna 40,42,44,46 is similar to antenna 10, therefore eliminates the symbol of same components.With the difference of antenna 10, antenna 40 is that the rescinded angle region of a sheet metal 404a of antenna 40 is trapezoidal, with the difference of antenna 10, antenna 42 is that the rescinded angle shape of a sheet metal 404b of antenna 42 is stairstepping, with the difference of antenna 10, antenna 44 is that the rescinded angle shape of a sheet metal 404c of antenna 44 is curved, and with the difference of antenna 10, antenna 46 is that the rescinded angle shape of a sheet metal 404d of antenna 46 is string waveform.Except sheet metal rescinded angle form difference, the framework of antenna 40,42,44,46 is all identical with antenna 10, therefore antenna 40,42,44,46 also can reach the advantages such as broadband, multiband, small size, high efficiency.
It is noted that Fig. 4 A to Fig. 4 D illustrates that the angle θ, shape, position etc. of sheet metal 104 rescinded angle change all adaptability, make sheet metal 104 produce length variations needed for system, and then inspire suitable high frequency mode.In addition, in another embodiment, the present invention also can separately increase by a rescinded angle at the diagonal angle of the rescinded angle of sheet metal 104, to increase different length adjustment mechanism, to reach the object of coupling or frequency range fine setting, and this newly-increased rescinded angle also can be right angle trigonometry type or suitably changes according to Fig. 4 A to Fig. 4 D.For example, please refer to Fig. 5 A and Fig. 5 B, Fig. 5 A and Fig. 5 B be an antenna 50 of embodiments of the invention etc. the schematic diagram in visual angle and front, wherein and be labeled with the coordinate system of X, Y, Z, with display view angle position.The framework of antenna 50 is similar to the antenna 10 of Figure 1A to Fig. 1 D, therefore identical assembly is continued to use identical symbol and represented.With the difference of antenna 10, antenna 50 is that a sheet metal 504 of antenna 50 adds another rescinded angle compared to the sheet metal 104 of antenna 10, and this rescinded angle is stepped, and the rank with W1 to W4 are high.Rank height W1 ~ W4 can adjust the impedance matching of low-and high-frequency effectively.
Should be noted, sheet metal 504 is used to provide different Regulation mechanism compared to the rescinded angle that sheet metal 104 increases, make high-frequency work frequency range can be continuous, therefore the shape, position etc. of this rescinded angle all change on adaptability ground, such as, suitably can change with reference to Figure 1A or Fig. 4 A to Fig. 4 D.For example, in one embodiment, for the application of 2.4GHz, 5GHz frequency range of WLAN, rank height W2 ~ W4 can have following relation:
W2:W3:W4=1:2:2。
By this, antenna 50 can reach voltage standing wave ratio (Voltage Standing Waveform Ratio, VSWR) schematic diagram as shown in Figure 5 C.From Fig. 5 C, the low frequency operation frequency range FB_L of antenna 50 can meet the demand of WLAN 2.4GHz, high-frequency work frequency range FB_H is then by rescinded angle mechanism, it is made to comprise multiple continuous operation frequency range, thus roughly contain the scope of 5GHz to 6GHz, the requirement of WLAN 5GHz can be met completely.
In addition, the antenna (10,40 ~ 46,50) due to embodiments of the invention adopts multiple increase resonance path or strengthens the mechanism of bandwidth, as short circuit wall, rescinded angle, quarter-wave feed-in etc., therefore can effectively reduce required area.Example is applied as with 2.4GHz, 5GHz frequency range of WLAN, length needed for antenna can between 60mm to 35mm, width between 10mm to 13mm, and can highly be not less than 2mm, and the antenna efficiency, bandwidth etc. within the scope of this all can meet the demand of WLAN.For example, please refer to Fig. 6 A to Fig. 6 C and Fig. 7 A to Fig. 7 C; Fig. 6 A to Fig. 6 C is the length of antenna 50 when being set as 60mm, 13mm, 3mm respectively, the voltage standing wave ratio of antenna 50, antenna efficiency and field pattern schematic diagram; And the length that Fig. 7 A to Fig. 7 C is antenna 50 is when being set as 35mm, 10mm, 3mm respectively, the voltage standing wave ratio of antenna 50, antenna efficiency and field pattern schematic diagram.Wherein, in Fig. 6 C and Fig. 7 C, solid line, dotted line, dot-dash curve represent the field pattern of 2400MHz, 2450MHz, 2500MHz respectively.From Fig. 6 A to Fig. 7 C, even if reduce the size of antenna 50, antenna 50 still can maintain good bandwidth, efficiency and field pattern.
From the above, antenna of the present invention (10,40 ~ 46,50) can reach two-frequency operation, suitably can reduce required size, can increase the scope of high-frequency band, and have good efficiency of transmission.In this case, antenna of the present invention is also applicable to harsh environment, as the application of less setting area or metal shell.More precisely, for the electronic installation adopting metal back cover or metal edge frame, because the radiation direction of antenna of the present invention is mainly towards the direction beyond ground plate, the ground plate of antenna of the present invention is positively electrically connected with metal back cover or metal edge frame simultaneously, metal back cover or metal edge frame then can be avoided to have an impact to antenna performance, and then maintain good bandwidth, efficiency and field pattern.Should be noted, the application of so-called metal shell, refer to that the running circuit of electronic installation is roughly by the housing of metal material institute is coated or part is capped, but for guaranteeing that electromagnetic wave can normal radiation, antenna of the present invention should be arranged at not by region that metal shell covers completely, or, if metal shell is formed with a window in order to arrange the assembly such as screen or keyboard, then antenna of the present invention can be arranged at this window place contiguous.
For example, please refer to Fig. 8 A, front and partial cutaway schematic view that Fig. 8 B, Fig. 8 A, Fig. 8 B is an integrated computer system 80.Integrated computer system 80 is integrated with main frame and (touch-control) screen, and can have metal back cover or housing, that is metal shell is coated with the running circuit of main frame; In this case, antenna of the present invention can be arranged at a region 800 of the screen periphery (or can be considered the thereabout of metal shell) of integrated computer system 80, and the ground plate of antenna is connected with metal back cover, then can maintain good bandwidth, efficiency and field pattern.
Please refer to Fig. 9, Fig. 9 is the schematic diagram of a notebook computer 90.Notebook computer 90 consists predominantly of upper cover and base two parts, and both are also linked by rotating shaft and reciprocally open entire; Wherein, upper cover part mainly comprises the running circuit of screen and screen, and base portion mainly comprises main frame, keyboard and relevant running circuit.In this case, if notebook computer 90 has metal back cover or housing, then antenna of the present invention can be arranged at the region 902 around a region 900 of the screen periphery of notebook computer 90 or keyboard, and the ground plate of antenna is connected with metal back cover or housing, then can maintain good bandwidth, efficiency and field pattern.
Further, Figure 10 A, Figure 10 B are a schematic diagram with two kinds of operator schemes of the notebook computer 11 of flat computer function.Notebook computer 11 is also called yoga machine, rotating shaft between its screen upper cover and keyboard base except reciprocally open entire except, also can 360 degree of rotary foldings, thus can operate in the traditional notebook type computer patterns (i.e. Figure 10 A) of uncapping, or operate in the flat computer pattern (i.e. Figure 10 B) of closing lid.In this case, even if notebook computer 11 is with the coated running circuit of metal back cover, then antenna of the present invention can be arranged at a region 1100 of the screen edge of notebook computer 11.In this case, if antenna 50 is arranged at region 1100, then for two kinds of operator schemes, antenna 50 can have voltage standing wave ratio, antenna efficiency and field pattern schematic diagram as shown in Figure 11 A to Figure 11 E.In Figure 11 A to Figure 11 E, block curve and dashed curve represent that notebook computer 11 operates in the pattern of uncapping (as Figure 10 A) and closes the antenna performance of cover mold formula (as Figure 10 B) respectively, and Figure 11 C to Figure 11 E is the field pattern representing 2400MHz, 2450MHz, 2500MHz respectively.Therefore, from Figure 11 A to Figure 11 E, for the application of yoga machine, antenna 50 is not only applicable to the application of metal back cover, and can meet the Plate Procedure demand of closing under cover mold formula.
It is noted that previous embodiment is in order to illustrate concept of the present invention, those of ordinary skill in the art should do different modifications according to this, and is not limited thereto.For example, except the adjustment of aforesaid frequency or antenna performance Optimization Mechanism (as the length of sheet metal size, short circuit wall length or height, rescinded angle shape or structure, feed-in assembly or width etc.), the selection, antenna mounting locations etc. of other selections as substrate material, antenna material all suitably can adjust needed for system.Moreover, the two-frequency operation described in previous embodiment for the work of 2.4GHz, 5GHz, in fact, the present invention also can be used for single frequency band, if or high-frequency band is considered as be made up of multiple frequency sub-band, then the present invention also can work in plural frequency range, and is not limited to two-frequency operation.
In sum, the antenna of embodiments of the invention utilizes asymmetric feed-in, to excite two-frequency operation; Utilize short circuit wall, to reduce required width; Utilize rescinded angle structure, produce multiple mode at high frequency, to increase the scope of high-frequency band; And utilize quarter-wave transducer, impedance point is matched to 50 ohm, to promote efficiency of transmission.Therefore, the antenna of embodiments of the invention can have the advantages such as broadband, multiband, small size, high efficiency.
The foregoing is only preferred embodiment of the present invention, every equivalent variations of doing according to the scope of claims of the present invention and modification, all should belong to covering scope of the present invention.
Claims (40)
1. an antenna, this antenna is used for an electronic installation, and this antenna comprises:
One ground plate, this ground plate is used to provide ground connection;
One sheet metal, the shape of this sheet metal roughly corresponds to a rectangle, and is formed with one first rescinded angle at this rectangle one first jiao;
One feed-in assembly, this feed-in assembly is electrically connected at this sheet metal relative to one second jiao of this rectangle, and be used for transmitting electromagnetic energy, this second jiao adjacent to this first jiao; And
One short circuit wall, this short circuit wall is electrically connected one first limit of this ground plate and this sheet metal, makes to form a resonant cavity between this ground plate and this sheet metal, and this first limit is the opposite side of a Second Edge of this sheet metal, and this Second Edge is adjacent to this first jiao and this second jiao;
Wherein, a length of this rectangle corresponding to this sheet metal and a width are relevant to the frequency range of at least one working frequency range of this antenna respectively, and this first rescinded angle of this sheet metal is used for increasing the frequency range of one first frequency range in this at least one working frequency range.
2. antenna as claimed in claim 1, wherein this ground plate comprises one first block and one second block that are connected.
3. antenna as claimed in claim 2, wherein this first block and this second block comprise an angle.
4. antenna as claimed in claim 2, wherein this sheet metal and this first block form this resonant cavity.
5. antenna as claimed in claim 2, wherein this second block is electrically connected at a ground end.
6. antenna as claimed in claim 5, wherein this ground end is also electrically connected at a metal back cover of this electronic installation.
7. antenna as claimed in claim 1, wherein this first rescinded angle roughly corresponds to a right-angled triangle.
8. antenna as claimed in claim 4, wherein a hypotenuse of this right-angled triangle comprises a step structure, or curved.
9. antenna as claimed in claim 1, wherein this first rescinded angle is roughly trapezoidal corresponding to one.
10. antenna as claimed in claim 1, wherein this sheet metal is also formed with one second rescinded angle at a triangle of this rectangle, and this triangle is this diagonal angle of first jiao, and the shape of this second rescinded angle is relevant to the frequency range of this at least one frequency range.
11. antennas as claimed in claim 10, wherein this second rescinded angle roughly corresponds to a right-angled triangle.
12. antennas as claimed in claim 11, wherein a hypotenuse of this right-angled triangle comprises a step structure, or curved.
13. antennas as claimed in claim 10, wherein this second rescinded angle is roughly trapezoidal corresponding to one.
14. antennas as claimed in claim 1, wherein this feed-in assembly is a microstrip line, and the length of this feed-in assembly is relevant to the wireless signal wave-length coverage in this at least one frequency range corresponding to a peak low band.
15. antennas as claimed in claim 1, wherein this feed-in assembly comprises at least one bending.
16. antennas as claimed in claim 1, wherein this Second Edge of this sheet metal and the distance of this ground plate are more than or equal to a height of this short circuit wall.
17. antennas as claimed in claim 1, also comprise a fixture, this fixture is formed in this resonant cavity, is used for fixing the relative position of this sheet metal and this ground plate.
18. antennas as claimed in claim 1, this antenna is arranged at the frame of a screen of this electronic installation.
19. antennas as claimed in claim 1, wherein this electronic installation is a notebook computer, and this antenna is arranged at around a keyboard of this notebook computer.
20. antennas as claimed in claim 1, wherein a section of this fixture is trapezoidal or rectangle, or has cambered surface or corner cut.
21. 1 kinds of electronic installations, this electronic installation comprises:
One running circuit;
One metal shell, this metal shell this running circuit coated, and be formed with a window; And
One antenna, this antenna to be located in this metal shell and this window contiguous, and this antenna comprises:
One ground plate, this ground plate is used to provide ground connection, and this ground plate is electrically connected at this metal shell;
One sheet metal, the shape of this sheet metal roughly corresponds to a rectangle, and is formed with one first rescinded angle at this rectangle one first jiao;
One feed-in assembly, this feed-in assembly is electrically connected at this sheet metal relative to one second jiao of this rectangle, and be used for transmitting electromagnetic energy between this running circuit and this sheet metal, this second jiao adjacent to this first jiao; And
One short circuit wall, this short circuit wall is electrically connected one first limit of this ground plate and this sheet metal, makes to form a resonant cavity between this ground plate and this sheet metal, and this first limit is the opposite side of a Second Edge of this sheet metal, and this Second Edge is adjacent to this first jiao and this second jiao;
Wherein, a length of this rectangle corresponding to this sheet metal and a width are relevant to the frequency range of at least one working frequency range of this antenna respectively, and this first rescinded angle of this sheet metal is used for increasing the frequency range of one first frequency range in this at least one working frequency range.
22. electronic installations as claimed in claim 21, wherein this ground plate comprises one first block and one second block that are connected.
23. electronic installations as claimed in claim 22, wherein this first block and this second block comprise an angle.
24. electronic installations as claimed in claim 22, wherein this sheet metal and this first block form this resonant cavity.
25. electronic installations as claimed in claim 22, wherein this second block is electrically connected at a ground end.
26. electronic installations as claimed in claim 25, wherein this ground end is also electrically connected at this metal shell.
27. electronic installations as claimed in claim 21, wherein this first rescinded angle roughly corresponds to a right-angled triangle.
28. electronic installations as claimed in claim 24, wherein a hypotenuse of this right-angled triangle comprises a step structure, or curved.
29. electronic installations as claimed in claim 21, wherein this first rescinded angle is roughly trapezoidal corresponding to one.
30. electronic installations as claimed in claim 21, wherein this sheet metal is also formed with one second rescinded angle at a triangle of this rectangle, and this triangle is this diagonal angle of first jiao, and the shape of this second rescinded angle is relevant to the frequency range of this at least one frequency range.
31. electronic installations as claimed in claim 30, wherein this second rescinded angle roughly corresponds to a right-angled triangle.
32. electronic installations as claimed in claim 31, wherein a hypotenuse of this right-angled triangle comprises a step structure, or curved.
33. electronic installations as claimed in claim 30, wherein this second rescinded angle is roughly trapezoidal corresponding to one.
34. electronic installations as claimed in claim 21, wherein this feed-in assembly is a microstrip line, and the length of this feed-in assembly is relevant to the wireless signal wave-length coverage in this at least one frequency range corresponding to a peak low band.
35. electronic installations as claimed in claim 21, wherein this feed-in assembly comprises at least one bending.
36. electronic installations as claimed in claim 21, wherein this Second Edge of this sheet metal and the distance of this ground plate are more than or equal to a height of this short circuit wall.
37. electronic installations as claimed in claim 21, also comprise a fixture, this fixture is formed in this resonant cavity, is used for fixing the relative position of this sheet metal and this ground plate.
38. electronic installations as claimed in claim 21, wherein this window is used for arranging a screen, and this antenna is arranged at the frame of this screen.
39. electronic installations as claimed in claim 21, this electronic installation is a notebook computer, and wherein this window is used for arranging a keyboard, and this antenna is arranged at around this keyboard.
40. electronic installations as claimed in claim 21, wherein a section of this fixture is trapezoidal or rectangle, or tool cambered surface or corner cut.
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| CN201310409934.6A CN104425874B (en) | 2013-09-10 | 2013-09-10 | Antenna and electronic device |
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| CN201310409934.6A CN104425874B (en) | 2013-09-10 | 2013-09-10 | Antenna and electronic device |
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| CN104425874A true CN104425874A (en) | 2015-03-18 |
| CN104425874B CN104425874B (en) | 2017-05-17 |
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| CN108879084A (en) * | 2017-05-12 | 2018-11-23 | 深圳市道通智能航空技术有限公司 | Antenna module and electronic equipment with this antenna module |
| CN110113459A (en) * | 2019-05-27 | 2019-08-09 | 维沃移动通信有限公司 | A kind of method of controlling antenna and Folding screen terminal |
| CN113708065A (en) * | 2020-05-21 | 2021-11-26 | 华为技术有限公司 | Quasi-omnidirectional antenna and signal transceiving equipment |
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| CN104425874B (en) | 2017-05-17 |
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