CN105206923B - PIFA antenna and transmitting and receiving device comprising same - Google Patents
PIFA antenna and transmitting and receiving device comprising same Download PDFInfo
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- CN105206923B CN105206923B CN201510594157.6A CN201510594157A CN105206923B CN 105206923 B CN105206923 B CN 105206923B CN 201510594157 A CN201510594157 A CN 201510594157A CN 105206923 B CN105206923 B CN 105206923B
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Abstract
The invention discloses a PIFA antenna and a transmitting and receiving device comprising the same. The PIFA antenna comprises a medium substrate (12), a radiation structure and a feeder line (2), wherein the medium substrate (12) is located on an oxy plane, and the feeder line (2) is located on the lower surface of the medium substrate (12) and connected with the radiation structure through a via hole (3). The radiation structure comprises a longitudinal radiation part (4), a first transverse radiation part (6), a second transverse radiation part (7), a longitudinal open circuit metal piece (8) and a longitudinal short circuit metal piece (9). The invention further discloses the mobile terminal transmitting and receiving device. The mobile terminal transmitting and receiving device further comprises a battery (13), a floor board (11) and a radio frequency circuit (14), wherein the battery (13) is located on the medium substrate (12) and at the same side as the radiation structure of the antenna, and the radio frequency circuit (14) is located at the other side, relative to the battery (13), of the medium substrate (12).
Description
Technical field
The disclosure belongs to wireless communication field, is related to a kind of plane inverse-F (PIFA) antenna, and specifically a kind of broadband is low to be cutd open
Face PIFA antenna.
Background technology
Existing ultra-wideband antenna form now, mainly has plane printed monopole antenna, plane printed helical antenna, list
Cone antenna, biconical antenna etc..But, the existing Miniaturization Design for above-mentioned antenna, for the need of such as bracelet, watch kind
For wanting the electronic product of ultra-wideband communications, its size is still excessive, and cannot use.
PIFA antenna is to be developed by IFA antenna, and its Q-value is compared IFA antenna and significantly decreased, so that its
Available bandwidth obtains broadening.The form of its radiation field similar to the forms of radiation of microstrip antenna, and compared to microstrip antenna
Speech, it has less size.Therefore, PIFA antenna not only can have preferable bandwidth of operation, and also has compact, low
The advantages such as section.
Most PIFA antenna is all based on multi-resonant, multi-band, mainly applies to wireless communication terminal equipment.Very
The rare broadband-style for time domain impulse antenna, does not more accomplish to set with the collaborative integraty of radio circuit and power supply unit etc.
Meter.
For above demand, the invention discloses a kind of broadband low profile antenna.
Content of the invention
According to one aspect of the present invention it is proposed that a kind of PIFA antenna, including：Dielectric substrate 12, irradiation structure and
Feeder line 2.Wherein, irradiation structure includes：Longitudinal radiant section 4, the first lateral radiation part 6, the second lateral radiation part 7, vertical
To open circuit piece 8 and longitudinal short-circuit piece 9.Wherein, longitudinal radiant section 4, perpendicular to dielectric substrate 12, has the first side and second
Side, its first side is connected with dielectric substrate；First lateral radiation part 6 and the second lateral radiation part 7, equal and dielectric substrate
12 is parallel, and the first lateral radiation part 6 and the second lateral radiation part 7 are respectively provided with first end and the second end, the first lateral radiation
Part 6 is connected with the two ends on longitudinal radiant section 4 second side respectively with the first end of the second lateral radiation part 7, the second end
It is located at the homonymy of longitudinal radiant section 4；Longitudinally open circuit piece 8, has first end and the second end, and its first end connects to first horizontal
Second end of radiant section 6, the second end vertically connects to dielectric substrate 12；And longitudinal short-circuit piece 9, there is first end and the
Two ends, wherein, first end connects to the second end of the second lateral radiation part 7, and the second end vertically connects to dielectric substrate 12
And be connected to the ground.And feeder line 2, connect to the first side of longitudinal radiant section 4.
According to another aspect of the present invention it is proposed that a kind of R-T unit for mobile terminal, it is presented above
Also include on the basis of PIFA antenna：Battery 13, floor 11 and radio circuit 14.Wherein, battery 13 and the radiation of antenna are tied
Structure homonymy ground be located at dielectric substrate 12 on, separated by a distance with longitudinal radiant section 4 and along irradiation structure with respect to longitudinal spoke
The rightabout penetrating part 4 bearing of trend extends.
Brief description
Fig. 1 is the top view of the PIFA antenna structure according to one embodiment of the invention；
Fig. 2 is the side view of PIFA antenna structure shown in Fig. 1；
Fig. 3 is the expanded view of PIFA aerial radiation metal structure shown in Fig. 1；
Fig. 4 is the top view of the mobile terminal R-T unit according to one embodiment of the invention；
Fig. 5 is the side view of mobile terminal R-T unit shown in Fig. 4；
Fig. 6 is the actual measurement stationary wave characteristic curve chart to antenna structure in Fig. 1；
Fig. 7 is the Direction Pattern Simulation result to the xoy face of antenna structure in Fig. 1；
Fig. 8 is the Direction Pattern Simulation result to the yoz face of antenna structure in Fig. 1.
Specific embodiment
The specific embodiment of the present invention is described more fully below it should be noted that the embodiments described herein is served only for illustrating
Illustrate, be not limited to the present invention.In the following description, in order to provide thorough understanding of the present invention, a large amount of spies are elaborated
Determine details.It will be apparent, however, to one skilled in the art that：Need not be carried out this using these specific detail
Bright.In other instances, in order to avoid obscuring the present invention, known circuit, material or method are not specifically described.
Throughout the specification, meaning is referred to " embodiment ", " embodiment ", " example " or " example "
?：It is comprised at least one embodiment of the present invention in conjunction with the special characteristic of this embodiment or example description, structure or characteristic.
Therefore, in phrase " in one embodiment ", " in an embodiment ", " example " of each place appearance of entire disclosure
Or " example " is not necessarily all referring to same embodiment or example.Furthermore, it is possible to any suitable combination and or sub-portfolio will be specific
Feature, structure or property combination be in one or more embodiments or example.Additionally, those of ordinary skill in the art should manage
Solution, provided herein diagram be provided to descriptive purpose, and diagram is not necessarily drawn to scale.It should be appreciated that working as
Claim " element " " being connected to " or during " coupled " to another element, it can be to be directly connected or coupled to another element or permissible
There is intermediary element.On the contrary, when claiming element " being directly connected to " or " being directly coupled to " another element, there is not cental element
Part.Identical reference indicates identical element.Term "and/or" used herein includes what one or more correlations were listed
Any and all combination of project.
As the above mentioned although having illustrated and described the preferred embodiments of the present invention, but without departing substantially from this
In the case of bright spirit and scope, many changes can be carried out.Thus, the scope of the present invention is not by the open institute of preferred embodiment
Limit.But it should to determine the present invention entirely by reference to following claims.
Fig. 1 gives the top view of the PIFA antenna structure according to an embodiment of the present invention.Fig. 2 gives above-mentioned PIFA
The side view of antenna structure.As shown in Figure 1 and Figure 2, described PIFA antenna includes dielectric substrate 12, irradiation structure and feeder line 2.
Wherein dielectric substrate 12 be located at xoy plane, its along the x-axis direction width be wg, along the y-axis direction length be lg+lt.
In the embodiment depicted in figure 2, feeder line 2 is illustratively positioned on the lower surface of dielectric substrate 12, and by via 3 with
Irradiation structure is connected.Feeder line 2 shown in Fig. 2 adopts microstrip line form, and width is wf.Preferably, feeder line 2 has 50 ohm
Characteristic impedance.In the embodiment depicted in figure 2, microstrip line feeder line 2 exemplarily has right-angle turning, as L-type structure further,
And in corner, there is corner cut.It will be appreciated by those skilled in the art that the structure of feeder line 2 shown in Fig. 2 is exemplary only, not
For limiting the present invention.In another embodiment, microstrip feed line can also have other shapes and be not limited to L-type.In another reality
Apply in example, the right angle turn of microstrip feed line also can no corner cut.In another embodiment, feeder line can adopt coaxial line or other
Any suitable form.In another embodiment, feeder line may be alternatively located on the upper surface of dielectric substrate 12.
With regard to yoz plane symmetry, total section height of antenna is h2 to described PIFA antenna.Fig. 3 gives above-mentioned PIFA days
The expanded view of beta radiation structure.Described irradiation structure includes longitudinal radiant section 4, the first lateral radiation part 6, the second horizontal spoke
Penetrate part 7, longitudinally open circuit piece 8 and longitudinal short-circuit piece 9.
Described longitudinal radiant section 4 be located at xoz plane, vertical with dielectric substrate 12, its comprise first while, second while and open
Groove 5, wherein, the first side is contacted with dielectric substrate 12 and is connected to feeder line 2.Fig. 3 is exemplary to provide described longitudinal radiant section 4
Be shaped as isosceles trapezoid, the length on the wherein first side is w1, and the length on the second side is w2, and w1<w2.Described fluting 5 is from vertical
Extend while to first to the second of radiant section 4 and be located in longitudinal radiant section 4, its shape can be inverted T-shaped or cross
Shape etc..What Fig. 3 exemplarily provided fluting 5 is shaped as inverted T-shaped, and it includes longitudinal rectangular channel and horizontal rectangular channel, wherein, longitudinally
Rectangular channel, from the beginning of the second side of longitudinal radiant section 4, extends to the first side, vertical with horizontal rectangular channel.Inverted T-shaped longitudinal direction rectangle
The length and width of groove is respectively hs and ws, and the length and width of horizontal rectangular channel is respectively ls and ws, the width of two rectangular channels
Can be different, what Fig. 3 was given is identical situation.In the embodiment shown in fig. 3, T-shaped fluting 5 is with regard to yoz plane symmetry.So
And, it will be appreciated by those skilled in the art that in other embodiments, T-shaped fluting 5 also can be with regard to yoz plane symmetry, example
As, T-shaped fluting can move along x-axis both forward and reverse directions, or, longitudinal rectangular channel of T-shaped fluting need be not necessarily positioned at horizontal rectangular channel
On centrage.
Described first lateral radiation part 6 is all parallel with dielectric substrate 12 with the second lateral radiation part 7.As shown in figure 3,
First lateral radiation part 6 and the second lateral radiation part 7 be shaped as rectangle, its length of side along the x-axis direction is w3, along y-axis
The length of side in direction is l2, and is respectively provided with first end and the second end, the first end two ends phase with longitudinal radiant section 4 second side respectively
Connect, the second end is located at the homonymy of longitudinal radiant section 4, extends to y-axis direction.
Described longitudinally open circuit piece 8 is vertical with dielectric substrate 12.Longitudinally open circuit piece 8 has first end and the second end, wherein, the
One end connects to the second end of the first lateral radiation part 6, and the second end connects to dielectric substrate 12.As shown in figure 3, longitudinally opening a way
Piece 8 be shaped as rectangle, its length of side along the y-axis direction be l1, its length of side along the x-axis direction be w4, w4 be less than or equal to first
Lateral radiation part 6 length of side along the x-axis direction, i.e. w4≤w3, exemplarily provide the two equal situation in Fig. 3.
Described longitudinal short-circuit piece 9 is vertical with dielectric substrate 12.As shown in figure 3, longitudinal short-circuit piece 9 is rectangle, size is permissible
Identical with longitudinally open circuit piece 8, equally there is first end and the second end, wherein, first end connects to the second lateral radiation part 7
Second end, the second end connects to dielectric substrate 12 and is connected to the ground plate 11.What Fig. 1, Fig. 2 were exemplary gives described longitudinally short circuit
Second end of piece 9 is connected to the ground plate 11 by short-circuit line 10.To illustrate that working as short-circuit line 10, described open circuit piece 8 is connected herein
During to floor, described open circuit piece 8 has reformed into short-circuit piece, and described short-circuit piece 9 has reformed into open circuit piece.
Partly the fluting 5 on middle longitudinal radiant section 4 can improve low frequency input impedance matching to above-mentioned PIFA aerial radiation,
Enhanced Radiation Reduced Blast bandwidth.The width w3 that the width w4 of the longitudinal piece of opening a way of design is less than or equal to the first lateral radiation part 7 is permissible
Make the omni-directional of antenna radiation pattern more preferable.
In one embodiment, irradiation structure can be formed using metal.
Fig. 4 gives the top view of the R-T unit for mobile terminal according to an embodiment of the present invention.Fig. 5 is given
The side view of mobile terminal R-T unit.Mobile terminal R-T unit, in addition to comprising above-mentioned PIFA antenna, also includes battery
13rd, floor 11 and radio circuit 14.Wherein, battery 13 is located on the upper surface of dielectric substrate 12, ties with the radiation of antenna
Structure homonymy ground is located on substrate substrate 12.Battery 13 is separated by a distance with longitudinal radiant section 4, and extends along y-axis opposite direction.
Floor 11 is located at battery 13 times and is contacted with battery 13.Radio circuit 14 is located at the another of dielectric substrate 12 with respect to battery 13
Side and be located at battery under.Due to battery higher for section being placed on the same of dielectric substrate with aerial radiation structure in the disclosure
Side, and radio circuit is placed on the opposite side of dielectric substrate, can effectively reduce the section height of mobile terminal R-T unit
And the area of plane is it is achieved that Miniaturization Design.And, in the disclosure, due to the presence of longitudinal radiant section 4, antenna can be made
The energy of radiation is more concentrated, thus will not produce electromagnetic interference and battery between.
In order to verify the broadband character of above-mentioned PIFA antenna, exemplarily provide antenna sections design parameter herein and be used for
Simulating, verifying.The thickness h 1 of dielectric substrate 12 is designed as 0.5mm, and dielectric constant is 3.5；Via 3 radius is taken as 1mm；Battery is tied
The height of structure 13 is 5.5mm, and it is with longitudinal radiant section 4 is separated by a distance exemplarily takes 3mm.
The design parameter of antenna other parts see table 1：
Table 1 antenna each parameter dimensional units：mm
| wg | lg | lt | wf | ws | w1 | w2 | ls | hs | l1 | l2 | h1 | h2 |
| 30 | 29 | 6 | 1.1 | 1 | 1.1 | 22 | 7 | 1.8 | 5.5 | 11 | 0.5 | 6 |
In the environment of actual test, human arm is loaded and considers embodiment, to check the reality of described antenna
Border availability.Specific way is to lie against antenna to be measured in human arm wrist, is separated by 1mm with wrist, investigates to antenna
The impact of standing-wave ratio.Fig. 6 is the antenna actual measurement standing-wave ratio under the specific embodiment given by the present invention.As can be seen that to the greatest extent
After additional metal battery structure and human arm, antenna standing-wave ratio occurs in that different degrees of fluctuation to pipe, but from test
From the point of view of result, described wearable broadband low profile antenna remains to meet requirement of engineering.Result shows, is given under selected embodiment
Low profile antenna available bandwidth of operation in wearable broadband covers 2.2～5.5GHz frequency it is achieved that broadband low section radiates.
Longitudinally open circuit piece 8 and longitudinal short-circuit piece 9 can block the electromagnetic radiation of antenna, and its width w4 can affect antenna radiation pattern
Omni-directional.Selection radiation frequency is 3.5GHz, and other specification is with table 1, the longitudinally width w4 of open circuit piece 8 and longitudinal short-circuit piece 9
First take 7mm to take 4mm again, the directional diagram of antenna is emulated.Fig. 7 is the Direction Pattern Simulation result in xoy face, and Fig. 8 is yoz face
Direction Pattern Simulation result.Above-mentioned two charts understand, longitudinally the width w4 of open circuit piece 8 and longitudinal short-circuit piece 9 is less, and it is to antenna spoke
Penetrate that blocking of formation is less, so that omnidirectional's performance of antenna improves.But, the value excessively reducing w4 will make antenna low
The input impedance of frequency range rises and falls and becomes big it is difficult to mate, so needing compromise to consider in design.
The present invention take into account the layout of required radio circuit and power supply unit etc., have structure simple, with low cost,
The features such as compact in design, section are relatively low.For realizing being accurately positioned, the electronic equipment such as broadband high-speed communication provide a kind of feasible
Antenna design.
As the above mentioned although having illustrated and described the preferred embodiments of the present invention, but without departing substantially from this
In the case of bright spirit and scope, many changes can be carried out.Thus, the scope of the present invention is not by the open institute of preferred embodiment
Limit.But it should to determine the present invention entirely by reference to following claims.
Claims (10)
1. a kind of PIFA antenna is it is characterised in that include：
Dielectric substrate (12)；
Irradiation structure, including：
Longitudinal radiant section (4), perpendicular to dielectric substrate (12), have first while and when second, wherein, the first side and medium base
Piece is connected；
First lateral radiation part (6) and the second lateral radiation part (7), all parallel with dielectric substrate (12), the first horizontal spoke
Penetrate part (6) and the second lateral radiation part (7) is respectively provided with first end and the second end, the first of the first lateral radiation part (6)
End is connected with the one end on longitudinal radiant section (4) second side, the first end of the second lateral radiation part (7) and longitudinal direction Department of Radiation
The other end dividing (4) second sides is connected, and the second end is located at the homonymy of longitudinal radiant section (4)；
Longitudinally open circuit piece (8), has first end and the second end, and wherein, first end connects to the of the first lateral radiation part (6)
Two ends, the second end of piece (8) of longitudinally opening a way vertically connects to dielectric substrate (12)；And
Longitudinal short-circuit piece (9), has first end and the second end, and wherein, first end connects to the of the second lateral radiation part (7)
Two ends, the second end of longitudinal short-circuit piece (9) vertically connects to dielectric substrate (12) and is connected to the ground；And
Feeder line (2), connects to the first side of longitudinal radiant section (4).
2. PIFA antenna as claimed in claim 1 is it is characterised in that have fluting on longitudinal radiant section (4), fluting is from vertical
Extend while to first to the second of radiant section (4) and be located in longitudinal radiant section (4).
3. PIFA antenna as claimed in claim 2 is it is characterised in that described fluting is inverted T shape or cross.
4. PIFA antenna as claimed in claim 1 is it is characterised in that longitudinally the width of open circuit piece (8) is less than or equal to first
The width of lateral radiation part (6), and the width of longitudinal short-circuit piece (9) is less than or equal to the width of the second lateral radiation part (7)
Degree.
5. PIFA antenna as claimed in claim 1 it is characterised in that with regard to dielectric substrate (12) and longitudinal radiant section
(4) perpendicular, and the plane symmetry through longitudinal radiant section (4) second side perpendicular bisector.
6. PIFA antenna as claimed in claim 1 is it is characterised in that longitudinal radiant section (4) is isosceles trapezoid and the second side
It is longer than the first side.
7. a kind of R-T unit for mobile terminal is it is characterised in that include：
Antenna as described in any one in claim 1 to 6；And
Battery, with the irradiation structure homonymy of antenna be located at dielectric substrate (12) on, be separated by a spacing with longitudinal radiant section (4)
From and along irradiation structure with respect to longitudinal radiant section (4) bearing of trend rightabout extend.
8. R-T unit as claimed in claim 7 is it is characterised in that R-T unit also includes radio circuit, radio circuit phase
The opposite side of dielectric substrate is located at for battery and is located under battery.
9. it is characterised in that R-T unit also includes floor (11), floor is located at electricity to R-T unit as claimed in claim 8
Under pond and contact, antenna also includes short-circuit line, and the second end of longitudinal short-circuit piece (9) is connected to the ground plate (11) by short-circuit line.
10. R-T unit as claimed in claim 7 is it is characterised in that feeder line (2) is located at the lower surface of dielectric substrate (12)
On, it is connected with the first side of longitudinal radiant section (4) by via (3).
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| Application Number | Priority Date | Filing Date | Title |
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| CN201510594157.6A CN105206923B (en) | 2015-09-17 | 2015-09-17 | PIFA antenna and transmitting and receiving device comprising same |
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| CN201510594157.6A CN105206923B (en) | 2015-09-17 | 2015-09-17 | PIFA antenna and transmitting and receiving device comprising same |
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| CN105206923A CN105206923A (en) | 2015-12-30 |
| CN105206923B true CN105206923B (en) | 2017-02-22 |
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Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| TWI657619B (en) * | 2017-01-03 | 2019-04-21 | 和碩聯合科技股份有限公司 | Planar antenna module and electronic device |
| CN108012403A (en) * | 2017-11-28 | 2018-05-08 | 无锡市同步电子科技有限公司 | A kind of cabling optimization method at microstrip line cabling turning |
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|---|---|---|---|---|
| CN201004481Y (en) * | 2006-12-11 | 2008-01-09 | 友劲科技股份有限公司 | Single plate symmetric antenna and wireless network device with this antenna |
| US7589682B1 (en) * | 2008-03-18 | 2009-09-15 | Cameo Communications Inc. | Single-plate dual-band antenna and wireless network device having the same |
| CN201708243U (en) * | 2010-06-21 | 2011-01-12 | 友劲科技股份有限公司 | Flat-plate inverted-F-shaped antenna and wireless network device having the same |
| CN103765678A (en) * | 2011-08-26 | 2014-04-30 | Sii移动通信株式会社 | Planar inverted F antenna |
| WO2014182909A1 (en) * | 2013-05-09 | 2014-11-13 | Knowles Capital Formation Inc. | Planar inverted-f wing antenna for wireless culinary appliances |
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2015
- 2015-09-17 CN CN201510594157.6A patent/CN105206923B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201004481Y (en) * | 2006-12-11 | 2008-01-09 | 友劲科技股份有限公司 | Single plate symmetric antenna and wireless network device with this antenna |
| US7589682B1 (en) * | 2008-03-18 | 2009-09-15 | Cameo Communications Inc. | Single-plate dual-band antenna and wireless network device having the same |
| CN201708243U (en) * | 2010-06-21 | 2011-01-12 | 友劲科技股份有限公司 | Flat-plate inverted-F-shaped antenna and wireless network device having the same |
| CN103765678A (en) * | 2011-08-26 | 2014-04-30 | Sii移动通信株式会社 | Planar inverted F antenna |
| WO2014182909A1 (en) * | 2013-05-09 | 2014-11-13 | Knowles Capital Formation Inc. | Planar inverted-f wing antenna for wireless culinary appliances |
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