CN203660057U - Wide-band antenna - Google Patents
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- CN203660057U CN203660057U CN201420035667.0U CN201420035667U CN203660057U CN 203660057 U CN203660057 U CN 203660057U CN 201420035667 U CN201420035667 U CN 201420035667U CN 203660057 U CN203660057 U CN 203660057U
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- 230000000694 effects Effects 0.000 claims abstract description 20
- 238000004891 communication Methods 0.000 claims abstract description 13
- 230000008878 coupling Effects 0.000 claims description 19
- 238000010168 coupling process Methods 0.000 claims description 19
- 238000005859 coupling reaction Methods 0.000 claims description 19
- 230000008859 change Effects 0.000 claims description 3
- 230000005855 radiation Effects 0.000 abstract description 23
- 238000006073 displacement reaction Methods 0.000 abstract description 4
- 230000008901 benefit Effects 0.000 abstract description 3
- 239000002184 metal Substances 0.000 abstract description 2
- 238000010586 diagram Methods 0.000 description 16
- 238000013461 design Methods 0.000 description 4
- 230000003071 parasitic effect Effects 0.000 description 3
- 238000010521 absorption reaction Methods 0.000 description 2
- 230000007774 longterm Effects 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000004044 response Effects 0.000 description 2
- 240000001439 Opuntia Species 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 230000001808 coupling effect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000010295 mobile communication Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
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Abstract
A wide-band antenna is provided. The wide-band antenna is used for a wireless communication device. The wide-band antenna comprises a grounding assembly which is used for providing grounding, a first radiation body, a second radiation body which is electrically connected to the grounding assembly, a signal feed-in assembly which is used for transmitting a radio-frequency signal to the first radiation body so as to enable the first radiation body to send the radio-frequency signal, and a passive assembly which comprises an inductance element, is electrically connected between the first radiation body and the second radiation body or connected between a metal piece of the first radiation body and the second radiation body, and is used for forming a loop antenna effect with the first radiation body, the second radiation body and the grounding assembly. The wide-band antenna can produce a wide-band effect and can also provide a low-frequency band mode resonance path, so that the impedance matching and the bandwidth and displacement of the resonance frequency are adjusted; and the antenna has the advantages of high bandwidth, high efficiency and small size.
Description
Technical field
The utility model relates to a kind of broad-band antenna, espespecially a kind of in conjunction with inductance element, to increase the beamwidth of antenna and to adjust impedance matching, and can effectively dwindle the broad-band antenna of antenna size.
Background technology
There is the electronic product of radio communication function, as notebook computer, flat computer, personal digital assistant (Personal Digital Assistant), wireless base station, mobile phone, intelligent electric meter (Smart Meter), USB wireless network card (USB dongle) etc., launch or receive radio wave by antenna, to transmit or exchange radio signal, and then accessing wireless network.Along with the rise of Long Term Evolution (Long Term Evolution, LTE), the demand of the beamwidth of antenna significantly increases, to promote the transmission rate of wireless communications products.On the other hand, wireless communications products apparent size is pursued compact, and the size of antenna should be dwindled as far as possible, with the trend that coordinates small product size to dwindle.
The common broadband plane antenna framework for LTE frequency range is planar inverted-F antenna, coupling type antenna etc.Wherein, planar inverted-F antenna has conductive pin can assist impedance matching, but needs larger extension space just can reach wider bandwidth and aerial radiation usefulness preferably, and coupling type antenna general size is less, but easily affected by environment, and be difficult for carrying out impedance matching.
In addition; the design of antenna also needs to consider to meet safety standard SAR(Specific Absorption Rate; specific absorption rate) authentication; therefore mobile communications device can avoid using the antenna form of solid space conventionally as the Antenna Design in flat computer, notebook computer, mobile phone, and this degree of difficulty for Antenna Design promotes thereupon.As known in the art; reduce the external interference (being SAR value) of radio communication device and conventionally can affect antenna performance; therefore the aerial radiation usefulness that, simultaneously will design and will meet safety standard SAR authentication belong to more difficult thing in the test of safety standard.
Therefore, how to improve the beamwidth of antenna, meet safety standard SAR authentication, and can effectively dwindle antenna size, become one of target that industry makes great efforts.
Thereby, need to provide a kind of broad-band antenna to meet the demand.
Utility model content
The utility model mainly provides a kind of broad-band antenna, and it to increase the beamwidth of antenna and to adjust impedance matching, and can effectively dwindle antenna size in conjunction with coupling type antenna and inductance element.
The utility model discloses a kind of broad-band antenna, and this broad-band antenna is for a radio communication device, and this broad-band antenna comprises: a grounding assembly, and this grounding assembly is used to provide ground connection; One first radiant body; One second radiant body, this second radiant body is electrically connected at this grounding assembly; One signal feed-in assembly, this signal feed-in assembly is used for a radiofrequency signal to be sent to this first radiant body, to launch this radiofrequency signal by this first radiant body; An and passive block, this passive block comprises an inductance element, this passive block is electrically connected between this first radiant body and this second radiant body or is connected between a metalwork and this second radiant body of this first radiant body, is used for forming a loop antenna effect with this first radiant body, this second radiant body and this grounding assembly.
The utility model utilizes high and low frequency radiant body to intercouple, low-frequency resonance frequency is reduced, and in high frequency band multiple mode that resonates, to produce broadband effect, in addition, the utility model is electrically connected at the passive block that includes an inductance element between high and low frequency radiant body, so that low-frequency band mode resonance path to be provided, and then bandwidth and the displacement of adjustment impedance matching and resonance frequency, make antenna can have high bandwidth, high efficiency and undersized advantage concurrently.
Accompanying drawing explanation
Fig. 1 is the schematic diagram of a broad-band antenna of the utility model embodiment.
Fig. 2 A is the current direction schematic diagram of the broad-band antenna of Fig. 1 while not adding inductance element.
Fig. 2 B is the current direction schematic diagram of the broad-band antenna of Fig. 1.
Fig. 3 A is the voltage standing wave ratio schematic diagram of the broad-band antenna of Fig. 1.
Fig. 3 B is the radiation efficiency schematic diagram of the broad-band antenna of Fig. 1.
Fig. 4 is the schematic diagram of a broad-band antenna of the utility model embodiment.
Fig. 5 A is the voltage standing wave ratio schematic diagram of the broad-band antenna of Fig. 4.
Fig. 5 B is the radiation efficiency schematic diagram of the broad-band antenna of Fig. 4.
Fig. 6 is the schematic diagram of a broad-band antenna of the utility model embodiment.
Fig. 7 is the schematic diagram of a broad-band antenna of the utility model embodiment.
Fig. 8 is the schematic diagram of a broad-band antenna of the utility model embodiment.
Primary clustering symbol description:
Embodiment
Please refer to Fig. 1, Fig. 1 is the schematic diagram of a broad-band antenna 10 of the utility model embodiment.Broad-band antenna 10 can be used for a radio communication device, in order to receive and dispatch the wireless signal of broadband or multiple frequency ranges, as the signal of LTE wireless communication system (its frequency range is roughly between 704MHz～960MHz and 1710MHz～2700MHz).Broad-band antenna 10 includes a signal feed-in assembly 100, a grounding assembly 102, one first radiant body 104, one second radiant body 106 and an inductance element 112.The first radiant body 104 can connect a metalwork, and this metalwork can include one the 3rd radiant body 108 and one the 4th radiant body 110.Grounding assembly 102 is used to provide ground connection, one earth terminal of signal feed-in assembly 100 can connect a system earth part of radio communication device or the ground wire of a coaxial cable, the other end is used for a radiofrequency signal to be sent to the first radiant body 104, to pass through the first radiant body 104, the 3rd radiant body 108 and the 4th radiant body 110 emitting radio frequency signals.In addition, radiofrequency signal is also electrically connected at the second radiant body 106 of grounding assembly 102 by the first radiant body 104 feed-ins in the mode of coupling, inductance element 112 is electrically connected between the first radiant body 104 and the second radiant body 106 or is connected between the metalwork and the second radiant body 106 of the first radiant body 104, is used for forming a loop antenna effect with the first radiant body 104, the second radiant body 106 and grounding assembly 102.Broad-band antenna 10 can be considered the combination of a unipole antenna and a parasitic element, and the first radiant body 104, the 3rd radiant body 108 and the 4th radiant body 110 are high frequency radiation body, represent the part of unipole antenna; The second radiant body 106 is low frequency radiation body, represents the part of parasitic element.Utilize high and low frequency radiant body to intercouple, antenna space effectively can be utilized, and coupling effect can drag down resonance frequency, and in high frequency band multiple mode that resonates, produce broadband effect, and be serially connected between radiant body 104,108,110 and radiant body 106 in conjunction with inductance element 112, low-frequency band mode resonance path is provided, and then increase the means of adjusting coupling, bandwidth and resonance frequency displacement, contain high bandwidth and high efficiency microminiature broad-band antenna to reach.
Specifically, the length of the first radiant body 104, the second radiant body 106, the 3rd radiant body 108, the 4th radiant body 110 is all roughly the quarter-wave of resonance frequency.The second radiant body 106 is used to provide the path of low frequency modal, mainly produces the mode of low-frequency range 704MHz～960MHz, and the area of the second radiant body 106 can increase bandwidth, and with a little high frequency mode resonance.Before not adding inductance element 112, broad-band antenna 10 still can normal operation, and wherein the current direction on the first radiant body 104 and the second radiant body 106 as shown in Figure 2 A.It should be noted that the current direction D1 on the first radiant body 104 is contrary with the current direction D2 on the second radiant body 106, can resonate out the mode of 900～1100MHz in low-frequency range of contrary current direction, becomes the key factor that improves bandwidth in low-frequency range.Between the first radiant body 104, the 3rd radiant body 108 and the 4th radiant body 110 and the second radiant body 106, at least there is respectively coupling space h1, h2, h3, by adjusting the coupling of two low frequency modals of adjustable in length of the size of coupling space h1, h2, h3 and coupling space h1, h2, h3, to reach optimized impedance matching.Because the first radiant body 104, the 3rd radiant body 108 and the 4th radiant body 110 and the second radiant body 106 intercouple, the length of the second radiant body 106, the 3rd radiant body 108 can significantly be shortened, and then reach the object of dwindling antenna size.
On the other hand, the first radiant body 104, the 3rd radiant body 108 and the 4th radiant body 110 are used to provide the path of high frequency mode, the main mode that produces high band 1710MHz～2700MHz, wherein, the 3rd radiant body 108 can produce in high band compared with the part of low frequency (1710～2170MHz), during the first radiant body 104 and the 4th radiant body 110 can produce, the part of high band (2170～2700MHz), and the coupling space h1 adjusting between the first radiant body 104 and the second radiant body 106 can produce resonance effect, also can contribute part compared with the bandwidth of low frequency, and then adjustment 1710MHz～2700MHz bandwidth and the required energy of each frequency range.
In addition, broad-band antenna 10 is between low frequency radiation body and high frequency radiation body and connect inductance element 112, is used for forming a loop antenna effect with the first radiant body 104, the second radiant body 106 and grounding assembly 102.As shown in Figure 2 B, in a specific inductance value range, the low-frequency current path of antenna lengthens, and high-frequency current is suppressed by inductance, and does not affect the characteristic of high frequency band resonance, therefore can be used to adjust the low frequency coupling of antenna.When the inductance value of inductance element 112 is less, the high-frequency current that can circulate is more, and low frequency loop effects reduces, and low frequency bandwidth is narrower, but coupling better, and energy is more concentrated.On the contrary, when the inductance value of inductance element 112 is larger, the high-frequency current that can circulate is less, and low frequency loop effects increases, and low frequency bandwidth is wider, but coupling can be poorer, and energy disperses.The effect that inductance element 112 produces can be confirmed by the antenna measurement in Fig. 3 A to Fig. 3 B.Fig. 3 A is voltage standing wave ratio (Voltage Standing Wave Ratio, the VSWR) schematic diagram of broad-band antenna 10, and Fig. 3 B is the radiation efficiency schematic diagram of broad-band antenna 10.Wherein, dotted line represents antenna performance when broad-band antenna 10 does not add inductance element 112, the antenna performance of fine rule representative broad-band antenna 10 in the time that the inductance value of inductance element 112 is about 22nH, and the antenna performance of thick line representative broad-band antenna 10 in the time that the inductance value of inductance element 112 is about 56nH.Shown in Fig. 3 B, use the inductance element 112(thick line of suitable inductance value) can make antenna produce higher bandwidth and antenna radiation efficiency preferably.And in the time using lower inductance value, do not need adjustment antenna frame again, can strengthen specific LTE frequency range in low-frequency range required compared with the standard of high antenna efficiency.
Should be noted, the passive block that the utility model utilization comprises an inductance element is arranged between unipole antenna and parasitic element, to increase the beamwidth of antenna, to adjust impedance matching, and dwindles antenna size.The broad-band antenna 10 of Fig. 1 is embodiment of the present utility model, and those of ordinary skill in the art should do different modifications according to this, and is not limited to this.For instance, in the embodiment in figure 1, the metalwork that connects the first radiant body 104 includes the 3rd radiant body 108 and the 4th radiant body 110, but be not limited to this, the metalwork that connects the first radiant body 104 also can comprise more radiant bodies, or only comprise a radiant body or simple metal connecting sheet, as long as the electric connection characteristic of metalwork can make inductance element 112 and the first radiant body 104, the second radiant body 106 and grounding assembly 102 form a loop antenna effect.The position of inductance element 112 is not limited to shown in Fig. 1, as long as be electrically connected between the first radiant body 104 and the second radiant body 106 or be connected the metalwork (as the 3rd radiant body 108, the 4th radiant body 110) of the first radiant body 104 and the second radiant body 106 between all have similar effect.As shown in Figure 4, inductance element can be inductance element 112, can also be inductance element 114, inductance element 116 or inductance element 118 etc.The position that changes inductance element can change the low frequency radiation body current path of broad-band antenna 10, and then changes low-frequency resonant point.Fig. 5 A is the voltage standing wave ratio schematic diagram that in broad-band antenna 10, inductance element is arranged at diverse location, and Fig. 5 B is the radiation efficiency schematic diagram that in broad-band antenna 10, inductance element is arranged at diverse location.Wherein, thick line represents antenna performance when broad-band antenna 10 uses inductance element 112, and fine rule represents antenna performance when broad-band antenna 10 uses inductance element 114, and dotted line represents antenna performance when broad-band antenna 10 uses inductance element 116.From Fig. 5 A and Fig. 5 B, the position of inductance element can determine the frequency height of antenna.Therefore, by suitably choosing inductance value and the position of inductance element, can produce the resonance mode of containing all LTE low-frequency ranges (704～960MHz).
In addition, the broad-band antenna of the present utility model capacitance applications of also can arranging in pairs or groups, for example by one or more inductance and/or capacitances in series between one end and radiant body of inductance element 112, or by parallel with inductance element 112 to one or more inductance and/or electric capacity, be similar to a filter loop to form.Thus, the electric current of special frequency channel will conducting, forms the loop antenna effect of special frequency channel, and then adjusts required frequency response.Or, also can arrange in pairs or groups variable inductance or variable capacitance, by system control inductance or capacitance change, and then switch low-frequency range can service band, to meet the required antenna performance of different specification.As shown in Figure 6, the inductance element 612 of broad-band antenna 60 is an adjustable electric sensing unit, is coupled to the radio module controller (Sensor Hub, sensor hub) 620 in radio communication device.Radio module controller 620 can be used to switch an inductance value of inductance element 612, and then changes resonance frequency and the coupling of broad-band antenna 60, makes broad-band antenna 60 can meet the required antenna performance of different specification.As shown in Figure 7, broad-band antenna 70 has adjustable electric sensing unit 712 and the passive block 714 of series connection, passive block 714 can be an adjustable electric capacity element, adjustable electric sensing unit 712 passive block 714 of connecting can produce band pass filter (Band-pass Filter) effect, make the circulation of special frequency channel signal, and form loop antenna effect, adjustment antenna match.As shown in Figure 8, broad-band antenna 80 has adjustable electric sensing unit 812 in parallel and passive block 814, passive block 814 can be an adjustable electric capacity element, adjustable electric sensing unit 812 passive block 814 in parallel can produce band stop filter (Band-stop Filter) effect, make the circulation of special frequency channel signal, and form loop antenna effect, adjustment antenna match.The use of can arranging in pairs or groups of the means of above-mentioned various adjustment antenna match, to meet different communications applications.
In addition, as industry is known, the radiation frequency of antenna, bandwidth, efficiency etc. are relevant to antenna pattern, material etc., and therefore, designer should suitably adjust broad- band antenna 10,60,70,80, required to meet system.Should be noted, the above-mentioned various variations about broad-band antenna of the present utility model are intended to illustrate between the high and low frequency radiant body that the utility model utilizes the passive block such as electric capacity, inductance to be arranged to intercouple, with the bandwidth of improving antenna with mate, other all can do suitable variation in response to different demands as shape, the position etc. of material, production method, each assembly, are not limited to this.
In sum, the utility model utilizes high and low frequency radiant body to intercouple, and low-frequency resonance frequency is reduced, and in high frequency band multiple mode that resonates, to produce broadband effect.In addition, the utility model is electrically connected at the passive block that includes an inductance element between high and low frequency radiant body, so that low-frequency band mode resonance path to be provided, and then bandwidth and the displacement of adjustment impedance matching and resonance frequency, make antenna can have high bandwidth, high efficiency and undersized advantage concurrently.
The foregoing is only preferred embodiment of the present utility model, every equivalent variations of doing according to the scope of the utility model claims and modification, all should belong to covering scope of the present utility model.
Claims (10)
1. a broad-band antenna, this broad-band antenna is for a radio communication device, and this broad-band antenna comprises:
One grounding assembly, this grounding assembly is used to provide ground connection;
One first radiant body;
One second radiant body, this second radiant body is electrically connected at this grounding assembly; And
One signal feed-in assembly, this signal feed-in assembly is used for a radiofrequency signal to be sent to this first radiant body, to launch this radiofrequency signal by this first radiant body;
It is characterized in that, this broad-band antenna also comprises a passive block, this passive block comprises an inductance element, this passive block is electrically connected between this first radiant body and this second radiant body or is connected between a metalwork and this second radiant body of this first radiant body, is used for forming a loop antenna effect with this first radiant body, this second radiant body and this grounding assembly.
2. broad-band antenna as claimed in claim 1, is characterized in that, between this first radiant body and this second radiant body, has one first coupling space, make this radiofrequency signal with coupling mode by this this second radiant body of the first radiant body feed-in.
3. broad-band antenna as claimed in claim 1, is characterized in that, the current opposite in direction that this radiofrequency signal produces on this first radiant body and this second radiant body.
4. broad-band antenna as claimed in claim 1, it is characterized in that, this metalwork comprises one the 3rd radiant body, the 3rd radiant body is electrically connected at this first radiant body, and between the 3rd radiant body and this second radiant body, there is one second coupling space, make this radiofrequency signal with coupling mode by this second radiant body of the 3rd radiant body feed-in.
5. broad-band antenna as claimed in claim 4, is characterized in that, this metalwork also comprises one the 4th radiant body, and the 4th radiant body is electrically connected at the 3rd radiant body, and identical with the bearing of trend of this first radiant body.
6. broad-band antenna as claimed in claim 4, is characterized in that, this radiofrequency signal is identical with the sense of current producing on this second radiant body at the 3rd radiant body.
7. broad-band antenna as claimed in claim 1, is characterized in that, this passive block also comprises one or more inductance or electric capacity, this one or more inductance or capacitances in series or this inductance element in parallel.
8. broad-band antenna as claimed in claim 1, is characterized in that, this inductance element is an adjustable inductance.
9. broad-band antenna as claimed in claim 1, it is characterized in that, this inductance element is coupled to a radio module controller of this radio communication device, is used for switching an inductance value of this one or more inductance element, to change a resonance frequency and the coupling of this radiofrequency signal.
10. broad-band antenna as claimed in claim 7, is characterized in that, this one or more electric capacity is adjustable electric capacity.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420035667.0U CN203660057U (en) | 2014-01-20 | 2014-01-20 | Wide-band antenna |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201420035667.0U CN203660057U (en) | 2014-01-20 | 2014-01-20 | Wide-band antenna |
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| CN203660057U true CN203660057U (en) | 2014-06-18 |
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| CN201420035667.0U Expired - Fee Related CN203660057U (en) | 2014-01-20 | 2014-01-20 | Wide-band antenna |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104201464A (en) * | 2014-08-05 | 2014-12-10 | 西安电子科技大学 | Frequency-reconfigurable triple-band antenna and method |
| CN105576340A (en) * | 2014-09-16 | 2016-05-11 | 宏达国际电子股份有限公司 | Mobile device and manufacturing method thereof |
| CN106159442A (en) * | 2015-03-26 | 2016-11-23 | 邱宏献 | Many support arms trap antenna |
| CN106684558A (en) * | 2016-11-02 | 2017-05-17 | 上海捷士太通讯技术有限公司 | Antenna provided with matching circuit |
| CN107112634A (en) * | 2014-11-14 | 2017-08-29 | 株式会社村田制作所 | Antenna assembly and communicator |
| CN110350309A (en) * | 2018-04-03 | 2019-10-18 | 启碁科技股份有限公司 | Antenna structure |
| CN113270711A (en) * | 2020-02-15 | 2021-08-17 | 和硕联合科技股份有限公司 | Antenna module |
| US11145990B2 (en) | 2018-03-21 | 2021-10-12 | Wistron Neweb Corporation | Antenna structure having multiple operating frequency bands |
-
2014
- 2014-01-20 CN CN201420035667.0U patent/CN203660057U/en not_active Expired - Fee Related
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104201464A (en) * | 2014-08-05 | 2014-12-10 | 西安电子科技大学 | Frequency-reconfigurable triple-band antenna and method |
| CN105576340A (en) * | 2014-09-16 | 2016-05-11 | 宏达国际电子股份有限公司 | Mobile device and manufacturing method thereof |
| CN107112634A (en) * | 2014-11-14 | 2017-08-29 | 株式会社村田制作所 | Antenna assembly and communicator |
| CN106159442A (en) * | 2015-03-26 | 2016-11-23 | 邱宏献 | Many support arms trap antenna |
| CN106684558A (en) * | 2016-11-02 | 2017-05-17 | 上海捷士太通讯技术有限公司 | Antenna provided with matching circuit |
| CN106684558B (en) * | 2016-11-02 | 2023-12-29 | 上海捷士太通讯技术有限公司 | Antenna with matching circuit |
| US11145990B2 (en) | 2018-03-21 | 2021-10-12 | Wistron Neweb Corporation | Antenna structure having multiple operating frequency bands |
| CN110350309A (en) * | 2018-04-03 | 2019-10-18 | 启碁科技股份有限公司 | Antenna structure |
| CN113270711A (en) * | 2020-02-15 | 2021-08-17 | 和硕联合科技股份有限公司 | Antenna module |
| CN113270711B (en) * | 2020-02-15 | 2023-10-20 | 和硕联合科技股份有限公司 | Antenna module |
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Legal Events
| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140618 |