CN101533950B - Binary plane inverted F antenna array - Google Patents
Binary plane inverted F antenna array Download PDFInfo
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- CN101533950B CN101533950B CN200910097874A CN200910097874A CN101533950B CN 101533950 B CN101533950 B CN 101533950B CN 200910097874 A CN200910097874 A CN 200910097874A CN 200910097874 A CN200910097874 A CN 200910097874A CN 101533950 B CN101533950 B CN 101533950B
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- groove
- antenna array
- inverted
- pifa
- antennas
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Abstract
The invention discloses a binary plane inverted F antenna array, comprising a PCB medium board, and a metal floorboard fixed on the PCB medium board, wherein the metal floorboard has a through groove, two plane inverted F antennae are fixed at both sides of the through groove in parallel, the adjacent inner edges of the two plane inverted F antennae are respectively positioned at the same plane with the groove edge, the adjacent inner edges of the two plane inverted F antennae and the through groove form a lambda/2 groove antenna together, so that the coupling between two PIFAs can be weakened. The antenna array has the advantages of high isolation, low cost, compact structure, convenient manufacturing and integration, and the like.
Description
Technical field
The present invention relates to a kind of binary plane inverted F antenna array.
Background technology
In MIMO (many antenna inputs, many antenna outputs) communication, require the multiple antenna emission, multiple antenna receives simultaneously.All emissions with accept antenna and all be operated in identical frequency.In order to guarantee higher transmission rate, all antennas will guarantee less coupling.Require the portable terminal miniaturization, low cost in the MIMO communication simultaneously.The method of the isolation between traditional raising antenna generally is through increasing the antenna array unit spacing or two polarization mode different antennas being put together.But no matter be which kind of method, the center distance of antenna element is all bigger.And complex structure is difficult to satisfy the demand of MIMO communication.
Summary of the invention
The objective of the invention is the deficiency to prior art, provide that a kind of isolation is high, cost is low, compact conformation is convenient to make and integrated binary plane inverted F antenna array.
Binary plane inverted F antenna array of the present invention; Comprise the PCB dielectric-slab; Be fixed on the metal floor on the PCB dielectric-slab, metal floor has groove, and two planar inverted-F antennas (PIFA) secured in parallel is in the both sides of groove; The adjacent inner edge of two planar inverted-F antennas is in same plane with the trough rim of position respectively, and the adjacent inner edge of two planar inverted-F antennas and groove be common to constitute λ/2 slot antennas.
Beneficial effect of the present invention is:
Binary plane inverted F antenna array utilizes adjacent inner edge and λ/2 slot antennas of the common formation of groove of two planar inverted-F antennas; Can be used for weakening two couplings between PIFA; Under the situation of two PIFA spacings less than λ/50; Isolation in working band below the realization-20dB, the isolation below centre frequency place-30dB.The present invention has the isolation height, cost is low, and compact conformation such as is convenient to make and integrated at advantage.
Description of drawings
Fig. 1 is the formation sketch map of binary plane inverted F antenna array of the present invention, and wherein: (a) being front view, (b) is vertical view, (c) is end view;
Fig. 2 is the isolation characteristic sketch map of each output port of binary plane inverted F antenna array;
Fig. 3 is the return loss characteristic sketch map of each port of binary plane inverted F antenna array.
Embodiment
Further specify the present invention below in conjunction with accompanying drawing.
With reference to Fig. 1; Binary plane inverted F antenna array of the present invention comprises PCB dielectric-slab 1, is fixed on the metal floor 2 on the PCB dielectric-slab; Metal floor has groove 3; Two planar inverted-F antenna 4 secured in parallel are in the both sides of groove, and the adjacent inner edge 5 of two planar inverted-F antennas is in same plane with the trough rim of position respectively, and the adjacent inner edge 5 of two planar inverted-F antennas and groove 3 be common to constitute λ/2 slot antennas.
During work, utilize common λ/2 slot antennas that constitute of adjacent inner edge and groove of two planar inverted-F antennas, can weaken two couplings between PIFA, isolate the frequency f of strength
ISOCan be expressed as following formula:
Wherein, h
PIFA, l
PIFABe respectively the high and long of PIFA, l
SLOTBe the length of the groove that comprises medium influence on the floor, c is the free space light velocity.
The binary plane inverted F antenna array design example: designing a centre frequency is 2.44GHz, and-6dB bandwidth covers 2.4-2.48GHz (WLAN), isolates the binary PIFA array less than-20dB.The absolute bandwidth of this binary PIFA array is 107.7MHz, and relative bandwidth is 4.4%.Adopt the structure of Fig. 1 to realize that wherein the relative dielectric constant of PCB medium is 4.7, the metal thickness that is used to make antenna and floor in the structure is 0.4mm, the long L=24mm of metal floor, wide W=41mm, the h of PIFA unit
PIFA=7mm, l
PIFA=22mm, w
PIFA=6mm, the distance of two PIFA inner edges is Ws=1.8mm.The isolation performance of the binary PIFA array output end mouth of employing above-mentioned parameter design and return loss performance are as shown in Figures 2 and 3.
Fig. 2 has provided the isolation of the port of two PIFA; Among the figure: S21 is the transmission coefficient of input to the second PIFA output of first PIFA; S12 is the transmission coefficient of the input of second PIFA to first PIFA output; Transmission coefficient has reflected the degree of the isolation of two PIFA ports, transmission coefficient more septulum from good more.Binary plane inverted F antenna array of the present invention is isolated maximum and can be reached-30dB.
Fig. 3 has provided the amplitude response of two PIFA ports return losses separately.Among the figure: S11 is the reflection coefficient of first PIFA input, and S22 is the reflection coefficient of second PIFA output.
Visible by Fig. 2 and Fig. 3, binary plane inverted F antenna array of the present invention in the frequency range of work under the situation that keeps good return loss and isolation, simple in structure in addition, low cost and other advantages.
Claims (1)
1. binary plane inverted F antenna array; It is characterized in that comprising PCB dielectric-slab (1); Be fixed on the metal floor (2) on the PCB dielectric-slab, metal floor has groove (3), and two planar inverted-F antennas (4) secured in parallel is in the both sides of groove; The adjacent inner edge (5) of two planar inverted-F antennas is in same plane with the trough rim of the groove (3) of position respectively, and the adjacent inner edge (5) of two planar inverted-F antennas constitutes a λ/2 slot antennas jointly with groove (3).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910097874A CN101533950B (en) | 2009-04-20 | 2009-04-20 | Binary plane inverted F antenna array |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910097874A CN101533950B (en) | 2009-04-20 | 2009-04-20 | Binary plane inverted F antenna array |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101533950A CN101533950A (en) | 2009-09-16 |
| CN101533950B true CN101533950B (en) | 2012-08-29 |
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ID=41104409
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN200910097874A Expired - Fee Related CN101533950B (en) | 2009-04-20 | 2009-04-20 | Binary plane inverted F antenna array |
Country Status (1)
| Country | Link |
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| CN (1) | CN101533950B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110165378A (en) * | 2019-06-03 | 2019-08-23 | 广州由我科技股份有限公司 | A kind of antenna structure and earphone |
| CN114976602B (en) * | 2022-07-13 | 2022-12-20 | 荣耀终端有限公司 | Planar inverted-F antenna pair and electronic equipment |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1404330A (en) * | 2001-09-11 | 2003-03-19 | 正文科技股份有限公司 | Improved planar inversed F-shaped antenna |
| CN1430310A (en) * | 2002-01-04 | 2003-07-16 | 财团法人工业技术研究院 | Inverted F type plane antenna |
| CN201392884Y (en) * | 2009-04-20 | 2010-01-27 | 浙江大学 | Binary plane inverted-F antenna array |
-
2009
- 2009-04-20 CN CN200910097874A patent/CN101533950B/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1404330A (en) * | 2001-09-11 | 2003-03-19 | 正文科技股份有限公司 | Improved planar inversed F-shaped antenna |
| CN1430310A (en) * | 2002-01-04 | 2003-07-16 | 财团法人工业技术研究院 | Inverted F type plane antenna |
| CN201392884Y (en) * | 2009-04-20 | 2010-01-27 | 浙江大学 | Binary plane inverted-F antenna array |
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| Publication number | Publication date |
|---|---|
| CN101533950A (en) | 2009-09-16 |
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