CN104425899A - Multifrequency antenna - Google Patents
Multifrequency antenna Download PDFInfo
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- CN104425899A CN104425899A CN201310368112.8A CN201310368112A CN104425899A CN 104425899 A CN104425899 A CN 104425899A CN 201310368112 A CN201310368112 A CN 201310368112A CN 104425899 A CN104425899 A CN 104425899A
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- microstrip line
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Abstract
Disclosed is a multifrequency antenna for transceiving wireless signals of multiple frequency ranges. The multifrequency antenna comprises a grounding plate for providing grounding and forming a gap at a first edge; a first microstrip line which is substantially parallel to the first edge and has a length substantially equal to half of the wavelength of the wireless signals corresponding to the lowest frequency range among the multiple frequency ranges; a connecting assembly which is connected with one end of the first edge and one end of the first microstrip line so as to form a resonance cavity with the first edge and the first microstrip line; a second microstrip line which is arranged in the resonance cavity and is substantially parallel to the first microstrip line and is substantially spaced at a first interval from the first microstrip line; a third microstrip line which extends from the gap of the grounding plate to one end of the second microstrip line and is spaced at a second interval from the grounding plate at the gap; and a feed-in end which is formed on the third microstrip line in the gap for transmitting the wireless signals in multiple frequency ranges. According to the invention, the multifrequency characteristic can be realized by use of a single antenna body, and different demands can be satisfied by using multiple adjustable factors to adjust the characteristic of the antenna.
Description
Technical field
The present invention relates to a kind of multifrequency antenna, espespecially a kind of multifrequency antenna with multi-frequency Characteristic and multiple adjustable factors.
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 cordless 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, aerial integration is entered 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 network 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 multifrequency antenna to solve the problems referred to above.
Summary of the invention
Therefore, namely main purpose of the present invention is to provide a kind of multifrequency antenna, with under limited areal, reaches multi-band operation.
The present invention discloses a kind of multifrequency antenna, and this multifrequency antenna is used for receiving and dispatching the wireless signal of multiple frequency range, and this multifrequency antenna comprises: a ground plate, and this ground plate is used to provide ground connection, and is formed with a breach on one first limit; One first microstrip line, this first microstrip line is roughly parallel to this first limit of this ground plate, and the length of this first microstrip line is substantially equal to 1/2nd of the wireless signal wavelength in the plurality of frequency range corresponding to a peak low band; One coupling assembling, this coupling assembling connects one end of one end on this first limit of this ground plate and this first microstrip line, to form a resonant cavity with this first limit and this first microstrip line of this ground plate; One second microstrip line, this second microstrip line is arranged in this resonant cavity, almost parallel with this first microstrip line, and with this first microstrip line approximate distance one first spacing; One the 3rd microstrip line, the 3rd microstrip line extends to one end of this second microstrip line by this breach of this ground plate, and the 3rd microstrip line is in this breach and this ground plate distance one second spacing; And a feed side, this feed side is formed on the 3rd microstrip line in this breach, is used for transmitting the wireless signal of the plurality of frequency range.
Present invention utilizes unique feed-in and coupled structure, and single antenna body can be utilized to reach multi-frequency Characteristic, and antenna performance can be adjusted, with satisfied different demand by multiple adjustable factors.
Accompanying drawing explanation
Figure 1A is the schematic diagram of a multifrequency antenna of the embodiment of the present invention.
Figure 1B to Fig. 1 D is respectively the enlarged diagram of zones of different in Figure 1A.
Fig. 2 is the reflection loss schematic diagram of the multifrequency antenna of Figure 1A.
Fig. 3 is the radiation efficiency signal of the multifrequency antenna of Figure 1A.
Fig. 4 is the schematic diagram of a multifrequency antenna of the embodiment of the present invention.
Fig. 5 is the schematic diagram of a multifrequency antenna of the embodiment of the present invention.
Fig. 6 is the schematic diagram of a multifrequency antenna of the embodiment of the present invention.
Primary clustering symbol description:
Embodiment
Please refer to Figure 1A to Fig. 1 D, Figure 1A is the schematic diagram of a multifrequency antenna 10 of the embodiment of the present invention, and Figure 1B to Fig. 1 D is respectively the enlarged diagram of region A, B, C in Figure 1A.Multifrequency antenna 10 can be used to the wireless signal receiving and dispatching multiple frequency range, and it includes ground plate 100,1 first microstrip line 102, coupling assembling 104,1 second microstrip line 106, the 3rd microstrip line 108, feed side 110 and coupling block 112,114.Ground plate 100 is used to provide ground connection, and it is roughly rectangular, comprises four limit L1 ~ L4, and is formed with a breach CAV at the first limit L1.First microstrip line 102 is roughly parallel to the first limit L1 of ground plate 100, and its length D1 is substantially equal to 1/2nd of the wavelength of the wireless signal of peak low band in received and dispatched wireless signal.In addition, in this embodiment, the first microstrip line 102 is made up of sub-microstrip line 1020,1022, and both are at a distance of a spacing GP_a; Change an angle, the first microstrip line 102 is formed with the interval 1024 that a spacing is GP_a, and the first microstrip line 102 is divided into sub-microstrip line 1020 and 1022.Coupling assembling 104 connects one end of one end on the first limit L1 of ground plate 100 and the first microstrip line 102, to form a resonant cavity 12 with the first limit L1 and the first microstrip line 102 of ground plate 100.Second microstrip line 106 is arranged in resonant cavity 12, almost parallel with the first microstrip line 102, and with the first microstrip line 102 approximate distance one first spacing GP_1.3rd microstrip line 108 is extended to one end of the second microstrip line 106 by the breach CAV of ground plate 100, and the 3rd microstrip line 108 at breach CAV and ground plate 100 apart from one second spacing GP_2.110, feed side is formed on the 3rd microstrip line 108 in breach CAV, is used for transmitting wireless signal.On the other hand, coupling block 112,114 is extended to resonant cavity 12 by the first limit L1 of ground plate 100 and the first microstrip line 102 respectively, is used for adjusting the characteristics such as the impedance matching of multifrequency antenna 10 or field pattern high and low angle.
From the above, the 3rd microstrip line 108 forms co-plane waveguide (coplanarwaveguide, a CPW) framework at breach CAV place and ground plate 100, and direct connection (electric connection) second microstrip line 106.In other words, the 3rd microstrip line 108 can be considered that a co-plane waveguide feed-in structure is converted to the framework of a microstrip line construction, in order to Signal transmissions to the second microstrip line 106 by feed side 110.Therefore, breach CAV will be relevant to the characteristic such as working band, radiation efficiency of multifrequency antenna 10 relative to the position of the first limit L1, the 3rd microstrip line 108 at the second spacing GP_2 etc. of breach CAV and ground plate 100.For example, the impedance magnitude of the second spacing GP_2 size and the 3rd microstrip line 108 to ground plate 100 is inversely proportional to, namely distance is nearer, impedance is larger, in this case, suitably can set the size of the second spacing GP_2, make the impedance of the 3rd microstrip line 108 to ground plate 100 between the impedance (as 50 Ω) of transmission line being connected to feed side 110 and the antenna radiation impedance (as 177 Ω) of the second microstrip line 106, such as 60 Ω ~ 100 Ω.
Further, the 3rd microstrip line 108 is by after current lead-through to the second microstrip line 106, and the second microstrip line 106 can produce the electric current of horizontal direction, to excite a frequency range.In addition, second microstrip line 106 can produce coupling with the first microstrip line 102, to produce by the electric current of the vertical direction of the second microstrip line 106 to the first microstrip line 102, make the coupling between the second microstrip line 106 and the first microstrip line 102 can excite another frequency range.In other words, first spacing GP_1 of the length D2 of the second microstrip line 106, the second microstrip line 106 and the first microstrip line 102, the second microstrip line 106, in the position (position as relative to the first microstrip line 102) etc. of resonant cavity 12, are all relevant to the characteristics such as the working band of multifrequency antenna 10, radiation efficiency.
In addition, be coupled to the electric current meeting conducting of the first microstrip line 102 to ground plate 100 by the second microstrip line 106, make resonant cavity 12 can produce resonance and inspire another frequency range.Therefore, the length D1 of the first microstrip line 102 will affect the characteristic such as working band, radiation efficiency of multifrequency antenna 10.On the other hand, because the first microstrip line 102 is divided into sub-microstrip line 1020,1022 by interval 1024, and again by coupling On current between sub-microstrip line 1020,1022, therefore the spacing GP_a at interval 1024 or position are also relevant to the working band, radiation efficiency etc. of multifrequency antenna 10.In addition, coupling block 112,114 is in order to adjustment coupling situation or field pattern high and low angle etc., and its position, shape etc. can suitably adjust, to meet needed for system.
From the above, the length D1 of the first microstrip line 102, the length D2 of the second microstrip line 106, first spacing GP_1 of the first microstrip line 102 and the second microstrip line 106, second microstrip line 106 is in the position (position as relative to the first microstrip line 102) of resonant cavity 12, breach CAV is relative to the position of the first limit L1, 3rd microstrip line 108 is at the second spacing GP_2 of breach CAV and ground plate 100, coupling block 112, the adjustable factors such as the position of 114 or shape, all be relevant to the working band of multifrequency antenna 10, the parameters such as radiation efficiency, appropriateness can adjust the characteristic of multifrequency antenna 10 by this.In other words, multifrequency antenna 10, under single antenna body, meets multifrequency demand, and known technology can be avoided by this need to increase the shortcoming of entire physical size.
For example, for North America intelligent electric meter, its communication requirement need meet the communication standard of CDMA2000, WCDMA, GSM, therefore the frequency range that need contain reaches eight.Wherein, low-frequency range is between 824MHz and 960MHz, CDMA BC0-CELL(824MHz ~ 849MHz is had for transmission according to communication system segmentation application, 869MHz to 894MHz be used for receive), WCDMA B5-CELL(824MHz ~ 849MHz be used for uplink, 869MHz ~ 894MHz be used for lower link), GSM850(824MHz ~ 849MHz be used for uplink, 869MHz ~ 894MHz be used for lower link), GSM900(880MHz ~ 915MHz be used for uplink, 925-960MHz be used for lower link), high band is between 1710MHz ~ 2170MHz, its frequency altogether contains CDMA BC1-PCS(1850MHz ~ 1990MHz according to communication system), CDMA BC1-PCS(1850MHz ~ 1910MHz is used for transmission, 1930MHz ~ 1990MHz is used for receiving), WCDMA B1-IMT(1920MHz ~ 1980MHz is used for uplink, 2110MHz ~ 2170MHz is used for lower link), WCDMA B2-PCS(1850MHz ~ 1910MHz is used for uplink, 1930MHz ~ 1990MHz is used for lower link), GSM DCS(1710MHz ~ 1785MHz is used for uplink, 1805MHz ~ 1875MHz is used for lower link), GSMPCS(1850MHz ~ 1910MHz is used for uplink, 1930MHz ~ 1990MHz is used for lower link).For application so on a large scale, known technology need utilize multiple antenna or multiple radiant body (as the slotted eye of slot antenna, the branch etc. of dipole antenna) to reach this demand, thus causes entire physical size and then to increase.By contrast, the present invention only need to adjust length D1, length D2, the first spacing GP_1, the second microstrip line 106 in the position (position as relative to the first microstrip line 102) of resonant cavity 12, breach CAV relative to the position of the position of the first limit L1, the second spacing GP_2, coupling block 112,114 or shape etc., reflection loss (Return Loss) schematic diagram as shown in Figure 2 and the signal of the radiation efficiency shown in Fig. 3 can be reached.From Fig. 2 and Fig. 3, after the multiple adjustable factors of adjustment, multifrequency antenna 10 can meet the demand of multiband and anti-noise jamming, is thus applicable to the communication requirement of North America intelligent electric meter, and does not need additionally to increase radiant body, can avoid the increase of entire area.In addition, Fig. 2 comprises multiple curve, and it represents by the accessible reflection loss of multifrequency antenna 10 after adjustment adjustable factors, to show design flexibility of the present invention.
It is noted that the multifrequency antenna 10 of Figure 1A is embodiments of the invention, except aforesaid adjustable factors, those of ordinary skill in the art should do different modifications according to this, and is not limited thereto.For example, in multifrequency antenna 10, the first microstrip line 102 only comprises monospace 1024, and it can control the generation at zero point; But be not limited thereto, space-number, interval location, interval width etc. that the first microstrip line 102 comprises all can appropriateness adjust.Such as, Fig. 4 is the schematic diagram of a multifrequency antenna 40 of the embodiment of the present invention.Multifrequency antenna 40 is identical with the framework of the multifrequency antenna 10 of Figure 1A, therefore same components is continued to use same-sign and represented.Multifrequency antenna 40 and multifrequency antenna 10 different be in, one first microstrip line 402 of multifrequency antenna 40 is made up of sub-microstrip line 4020,4022,4024, spacing GP_b1 apart, GP_b2; Change an angle, the first microstrip line 402 is formed with the interval 4026,4028 that spacing is GP_b1, GP_b2, and the first microstrip line 402 is divided into sub-microstrip line 4020,4022,4024.
In addition, coupling block 112,114 is in order to adjustment coupling situation, and its position, shape etc. can suitably adjust.Such as, Fig. 5 and Fig. 6 is respectively the schematic diagram of embodiment of the present invention multifrequency antenna 50,60.Multifrequency antenna 50,60 is identical with the framework of the multifrequency antenna 10 of Figure 1A, therefore same components is continued to use same-sign and represented.Multifrequency antenna 50,60 and multifrequency antenna 10 different be in, the coupling block 512 of multifrequency antenna 50,514 stepped, the coupling block 612,614 of multifrequency antenna 60 then comprises sub-block 6120,6122,6140,6142 respectively, its category all according to the invention.
The multifrequency antenna 40,50,60 of above-mentioned Fig. 4 to Fig. 6 all by multifrequency antenna 10 derive, in order to except aforementioned adjustable factors (length D1, D2, spacing GP_1, GP_2, the second microstrip line 106 are in the position of the position of resonant cavity 12, breach CAV), other still can be used to the adjustable factors adjusting antenna performance.In addition, other shapes, length, width etc. as the area of ground plate 100 or shape, coupling assembling 104 all can be applied to adjust antenna performance further.In addition, in the aforementioned embodiment, breach CAV is in order to form co-plane waveguide framework, and its semicircular shape can coordinate the application of through hole (Via), makes the 3rd microstrip line 108 remain equidistant with ground plate 100, and has the convenient advantage made; But be not limited thereto, the shape of breach CAV can also be common quadrangle or other shapes, and the shape that the 3rd microstrip line 108 is positioned at the part of breach CAV may correspond to the Adjusting Shape of breach CAV, still category according to the invention.
In addition, about the implementation of multifrequency antenna 10,40,50,60, its material can use soft printed circuit board or thin printed circuit board to make and be assembled on antenna carrier, then combines with applied device (as intelligent electric meter), in addition, also electrically-conducting paint material can be utilized to carry out being coated with or using printing, laser-engraving technique is arranged on carrier, its antenna carrier material can be acrylonitrile-butadiene-styrene copolymer (Acrylonitrile Butadiene Styrene, ABS), also glass reinforced epoxy (Fiberglass reinforced epoxy resin can be utilized, FR4) printed circuit board (PCB) made, or the flexible thin plate base that polyimides (Polyimide) is made (Flexible Film Substrate), even can be integrated in a part for circuit, to reduce occupied space.
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, increase except causing design complexities, more seriously, along with the increase of required frequency range, the overall dimensions of antenna also can and then increase.And, if antenna can installation space comparatively limited, even may cause inter-antenna interference, thus affect the normal operation of antenna.By contrast, multifrequency antenna provided by the present invention, make use of unique feed-in and coupled structure, and single antenna body can be utilized to reach multi-frequency Characteristic, and can adjust antenna performance, with satisfied different demand by multiple adjustable factors.
Claims (8)
1. a multifrequency antenna, this multifrequency antenna is used for receiving and dispatching the wireless signal of multiple frequency range, and this multifrequency antenna comprises:
One ground plate, this ground plate is used to provide ground connection, and is formed with a breach on one first limit;
One first microstrip line, this first microstrip line is roughly parallel to this first limit of this ground plate, and the length of this first microstrip line is substantially equal to 1/2nd of the wireless signal wavelength in the plurality of frequency range corresponding to a peak low band;
One coupling assembling, this coupling assembling connects one end of one end on this first limit of this ground plate and this first microstrip line, to form a resonant cavity with this first limit and this first microstrip line of this ground plate;
One second microstrip line, this second microstrip line is arranged in this resonant cavity, almost parallel with this first microstrip line, and with this first microstrip line approximate distance one first spacing;
One the 3rd microstrip line, the 3rd microstrip line extends to one end of this second microstrip line by this breach of this ground plate, and the 3rd microstrip line is in this breach and this ground plate distance one second spacing; And
One feed side, this feed side is formed on the 3rd microstrip line in this breach, is used for transmitting the wireless signal of the plurality of frequency range.
2. multifrequency antenna as claimed in claim 1, this multifrequency antenna also comprises at least one coupling block, is extended to this resonant cavity by this first limit of this ground plate or this first microstrip line, is used for adjusting the Signal Matching situation of this multifrequency antenna.
3. multifrequency antenna as claimed in claim 1, wherein the 3rd microstrip line is approximately perpendicular to this second microstrip line.
4. multifrequency antenna as claimed in claim 1, the shape being wherein positioned at the 3rd microstrip line of a part for this breach corresponds to the shape of this breach.
5. multifrequency antenna, wherein this breach roughly semicircular in shape as claimed in claim 1.
6. multifrequency antenna as claimed in claim 1, wherein this first microstrip line is formed with at least one interval, and this first microstrip line is divided into multiple line segment by this at least one interval.
7. multifrequency antenna as claimed in claim 6, wherein the quantity at this at least one interval, the width at each interval or the position that is formed at this first microstrip line are relevant at least one radiation parameter of this multifrequency antenna.
8. multifrequency antenna as claimed in claim 1, wherein this breach in the position on this first limit, the length of this first microstrip line, this first spacing, the length of this second microstrip line, this second microstrip line be relevant at least one radiation parameter of this multifrequency antenna in the position of this resonant cavity and this second spacing.
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| CN201310368112.8A CN104425899B (en) | 2013-08-21 | 2013-08-21 | Multifrequency antenna |
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| CN201310368112.8A CN104425899B (en) | 2013-08-21 | 2013-08-21 | Multifrequency antenna |
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| CN104425899B CN104425899B (en) | 2017-10-03 |
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| CN107785651A (en) * | 2016-08-31 | 2018-03-09 | 宏碁股份有限公司 | Electronic apparatus |
| CN109216928A (en) * | 2017-07-03 | 2019-01-15 | 仁宝电脑工业股份有限公司 | Multifrequency antenna |
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| CN104425899B (en) | 2017-10-03 |
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