CN104078764A - Ultra-wide-band and low-frequency-band deformed planar inverted-F antenna (PIFA) applied to body area network - Google Patents
Ultra-wide-band and low-frequency-band deformed planar inverted-F antenna (PIFA) applied to body area network Download PDFInfo
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- CN104078764A CN104078764A CN201410220345.8A CN201410220345A CN104078764A CN 104078764 A CN104078764 A CN 104078764A CN 201410220345 A CN201410220345 A CN 201410220345A CN 104078764 A CN104078764 A CN 104078764A
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- 230000005855 radiation Effects 0.000 claims description 20
- PEZNEXFPRSOYPL-UHFFFAOYSA-N (bis(trifluoroacetoxy)iodo)benzene Chemical compound FC(F)(F)C(=O)OI(OC(=O)C(F)(F)F)C1=CC=CC=C1 PEZNEXFPRSOYPL-UHFFFAOYSA-N 0.000 claims description 13
- 238000005452 bending Methods 0.000 claims description 13
- 241000826860 Trapezium Species 0.000 claims description 3
- 239000004020 conductor Substances 0.000 abstract description 5
- 238000004891 communication Methods 0.000 abstract description 3
- 230000005404 monopole Effects 0.000 description 8
- 238000010586 diagram Methods 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 3
- 230000004069 differentiation Effects 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000012938 design process Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
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Abstract
The invention discloses an ultra-wide-band and low-frequency-band deformed planar inverted-F antenna (PIFA) applied to a body area network. The ultra-wide-band and low-frequency-band deformed PIFA comprises an antenna radiating element, a floor, a feeding piece and a sub-miniature-A (SMA) antenna terminal. The antenna radiating element comprises a radiating piece and a short circuit piece. The radiating piece is connected with one end of the floor through the short circuit piece. The top of the feeding piece is connected with the radiating piece, and the bottom of the feeding piece is connected with an inner conductor of the SMA antenna terminal. The other end of the floor forms a bent section. The PIFA has the advantages that the size is small and the feeding mode is simple, and is suitable for communication of the body area network.
Description
Technical field
The present invention relates to the body area network communications field, particularly a kind of ultra broadband low-frequency range distortion PIFA that is applied to body area network.
Background technology
At present, the ultra-wideband antenna for wireless body area network having proposed, volume is bigger than normal, is subject to the impact of human body lossy dielectric.Because planar inverted-F antenna (Planar Inverted-F Antenna, PIFA) reduces the radiation of human body, and then specific absorption rate is low, so there is people to design the planar inverted-F antenna for human body communication.But, these planar inverted-F antenna complex structures, its manufacture difficulty is large.
Generally speaking, planar inverted-F antenna can classify as monopole antenna, Fig. 1, Fig. 2, Fig. 3 have provided respectively three kinds of monopole antennas to the differentiation of planar inverted-F antenna: the first is to realize plane inverse-F structure by adding inverted L-shaped conductor wire ground connection after the bending of line monopole and in left side, finally can expand as plane is to increase antenna band by bending conductor wire; The second is microstrip antenna, adds conductor wire ground connection realize plane inverse-F structure after being bent at feeder line homonymy; The third,, for top board loading monopole wire antenna, adds conductive plane ground connection in top board one side and realizes plane inverse-F structure.In design process, antenna left end adds short-circuit piece and is equivalent to introduce inductance in the antiresonant circuit of antenna formation, offsets the electric capacity that introduce due to monopole antenna bending on right side.
Summary of the invention
The shortcoming that the object of the invention is to overcome prior art, with not enough, provides a kind of ultra broadband low-frequency range distortion PIFA that is applied to body area network, and its size is less.
Object of the present invention realizes by following technical scheme:
A kind of ultra broadband low frequency distortion PIFA that is applied to body area network, comprise antenna radiation unit, floor, feed tab and SMA (Sub-Miniature-A) antenna terminal, wherein antenna radiation unit comprises radiation fin and short-circuit piece, radiation fin is connected by short-circuit piece with the one end on floor, feed tab top is connected with radiation fin, feed tab bottom is connected with SMA antenna terminal inner wire, and the other end on floor forms bending segment.
Described radiation fin be shaped as right-angled trapezium, the length L of upper base
t1for 7mm, the length L of going to the bottom
t2for 3mm, the length L of waist is 13mm.
The height h of described short-circuit piece is 5.5mm～6mm, width w
sfor 5mm; The width w of feed tab
ffor 7mm; Distance h between feed tab bottom and floor
ffor 1mm; Distance d between short-circuit piece and feed tab is 5mm; The length L on floor
gfor 60mm, width W
gfor 22mm, the height h of floor bending segment
gfor 7mm, length L
cfor 17mm.When the height h of short-circuit piece is 5.5mm, with S
11≤-10dB is standard, antenna cover 1.5GHz frequency range (3.5～5GHz); And h is while being 6mm, antenna cover bandwidth is 3.1～4.9GHz, altogether 1.7GHz frequency range; Although continuing increases h, the beamwidth of antenna increases a little, and h is set to 6mm can cover required frequency band.Distance d between short-circuit piece and feed tab affects the degree of depth of antenna reflection coefficient.After optimizing, select d be 5mm antenna can cover needed 3.1～4.9GHz frequency band.
Compared with prior art, tool has the following advantages and beneficial effect in the present invention:
1, the present invention has adopted hypotenuse top board technology, realizes impedance matching, and then widens frequency range, then adopt bending floor mode to make antenna well cover the ultra broadband low-frequency range of 3.1～4.9GHz.
2, the present invention adopts after hypotenuse top board technology and folding floor, and planar inverted-F antenna covers 3.1～4.6GHz and on human body, covers 3.4～4.6GHz (reflection coefficient S at free space
11≤-10dB).Due to the impact of human body, the Performance Ratio free space performance of antenna on human body is poorer a little, but still can accept, and makes this planar inverted-F antenna be suitable for body area network system.
3, the present invention considers the loss problem of baseplate material, DIELECTRIC CONSTANT ε
r=1 and the air of electrical loss angle tan δ ≈ 0 be used as the medium between top board radiation patch and floor, and air gap also can be used for installing other electronic equipments; Antenna feed sheet and floor are coplanar and between the two, have certain feed port, and while therefore making, sub-miniature A connector inner wire directly welds mutually with feed tab, and outer conductor is ined succession mutually with floor welded, have just avoided the problem in floor boring.
Accompanying drawing explanation
Fig. 1 is that the first monopole antenna develops schematic diagram;
Fig. 2 is that the second monopole antenna develops schematic diagram;
Fig. 3 is the third monopole antenna differentiation schematic diagram;
Fig. 4 is the structural representation that is applied to the ultra broadband low-frequency range distortion PIFA of body area network of the present invention;
Fig. 5 is the partial enlarged drawing that the dotted line circle that is out of shape PIFA described in Fig. 4 is lived part;
Fig. 6 is the dimensional parameters schematic diagram that is out of shape PIFA described in Fig. 4.
Embodiment
Below in conjunction with embodiment and accompanying drawing, the present invention is described in further detail, but embodiments of the present invention are not limited to this.
As Fig. 4,5, a kind of ultra broadband low frequency distortion PIFA that is applied to body area network, comprise antenna radiation unit, floor 1, feed tab 2 and SMA antenna terminal 4, wherein antenna radiation unit comprises radiation fin 5 and short-circuit piece 6, radiation fin 5 is connected by short-circuit piece 6 with the one end on floor 1, feed tab 2 tops are connected with radiation fin 5, feed tab 2 bottoms are connected with the inner wire 3 of SMA antenna terminal 4, the other end on floor 1 forms bending segment 7, and this bending segment 7 is by upwards bending the bending left of the other end on floor 1; Wherein SMA antenna terminal 4 connecting coaxial cables, export the signal of PIFA reception;
As Fig. 6, described radiation fin be shaped as right-angled trapezium, the length L of upper base
t1for 7mm, the length L of going to the bottom
t2for 3mm, the length L of waist is 13mm;
As Fig. 6, the height h of described short-circuit piece is 5.5mm～6mm, width w
sfor 5mm; The width w of feed tab
ffor 7mm; Distance h between feed tab bottom and floor
ffor 1mm; Distance d between short-circuit piece and feed tab is 5mm; The length L on floor
gfor 60mm, width W
gfor 22mm, the height h of floor bending segment
gfor 7mm, length L
cfor 17mm.When the height h of short-circuit piece is 5.5mm, with S
11≤-10dB is standard, antenna cover 1.5GHz frequency range (3.5～5GHz); And h is while being 6mm, antenna cover bandwidth is 3.1～4.9GHz, altogether 1.7GHz frequency range; Although continuing increases h, the beamwidth of antenna increases a little, and h is set to 6mm can cover required frequency band.
Above-described embodiment is preferably execution mode of the present invention; but embodiments of the present invention are not restricted to the described embodiments; other any do not deviate from change, the modification done under Spirit Essence of the present invention and principle, substitutes, combination, simplify; all should be equivalent substitute mode, within being included in protection scope of the present invention.
Claims (3)
1. a ultra broadband low frequency that is applied to body area network is out of shape PIFA, it is characterized in that: comprise antenna radiation unit, floor, feed tab and SMA antenna terminal, wherein antenna radiation unit comprises radiation fin and short-circuit piece, radiation fin is connected by short-circuit piece with the one end on floor, feed tab top is connected with radiation fin, feed tab bottom is connected with SMA antenna terminal inner wire, and the other end on floor forms bending segment.
2. the ultra broadband low frequency distortion PIFA that is applied to body area network according to claim 1, is characterized in that: described radiation fin be shaped as right-angled trapezium, the length L of upper base
t1for 7mm, the length L of going to the bottom
t2for 3mm, the length L of waist is 13mm.
3. the ultra broadband low frequency distortion PIFA that is applied to body area network according to claim 1, is characterized in that: the height h of described short-circuit piece is 5.5mm～6mm, width w
sfor 5mm; The width w of feed tab
ffor 7mm; Distance h between feed tab bottom and floor
ffor 1mm; Distance d between short-circuit piece and feed tab is 5mm; The length L on floor
gfor 60mm, width W
gfor 22mm, the height h of floor bending segment
gfor 7mm, length L
cfor 17mm.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410220345.8A CN104078764B (en) | 2014-05-22 | 2014-05-22 | A kind of ultra broadband low-frequency range deformation PIFA for being applied to body area network |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410220345.8A CN104078764B (en) | 2014-05-22 | 2014-05-22 | A kind of ultra broadband low-frequency range deformation PIFA for being applied to body area network |
Publications (2)
| Publication Number | Publication Date |
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| CN104078764A true CN104078764A (en) | 2014-10-01 |
| CN104078764B CN104078764B (en) | 2017-04-05 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2018133425A1 (en) * | 2017-01-22 | 2018-07-26 | 深圳市景程信息科技有限公司 | Folded dual-band antenna |
| CN108682944A (en) * | 2018-05-02 | 2018-10-19 | 电子科技大学 | A kind of miniaturization low section ultra wide band logarithm period monopole array antenna |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1742406A (en) * | 2002-10-10 | 2006-03-01 | 圣韵无线技术公司 | Narrow width dual/tri ISM band PIFA for wireless applications |
| CN102195142A (en) * | 2010-03-17 | 2011-09-21 | 西门子公司 | Planar antenna system |
| CN203942027U (en) * | 2014-05-22 | 2014-11-12 | 华南理工大学 | A kind of ultra broadband low-frequency range distortion PIFA that is applied to body area network |
-
2014
- 2014-05-22 CN CN201410220345.8A patent/CN104078764B/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1742406A (en) * | 2002-10-10 | 2006-03-01 | 圣韵无线技术公司 | Narrow width dual/tri ISM band PIFA for wireless applications |
| CN102195142A (en) * | 2010-03-17 | 2011-09-21 | 西门子公司 | Planar antenna system |
| CN203942027U (en) * | 2014-05-22 | 2014-11-12 | 华南理工大学 | A kind of ultra broadband low-frequency range distortion PIFA that is applied to body area network |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2018133425A1 (en) * | 2017-01-22 | 2018-07-26 | 深圳市景程信息科技有限公司 | Folded dual-band antenna |
| CN108682944A (en) * | 2018-05-02 | 2018-10-19 | 电子科技大学 | A kind of miniaturization low section ultra wide band logarithm period monopole array antenna |
| CN108682944B (en) * | 2018-05-02 | 2020-11-13 | 电子科技大学 | Miniaturized low-profile ultra-wideband log-periodic monopole array antenna |
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| CN104078764B (en) | 2017-04-05 |
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Granted publication date: 20170405 |