CN107546477A - A kind of flexible multifrequency antenna based on polyimide material - Google Patents
A kind of flexible multifrequency antenna based on polyimide material Download PDFInfo
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- CN107546477A CN107546477A CN201710591035.0A CN201710591035A CN107546477A CN 107546477 A CN107546477 A CN 107546477A CN 201710591035 A CN201710591035 A CN 201710591035A CN 107546477 A CN107546477 A CN 107546477A
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- radiation patch
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- polyimide material
- antenna based
- medium substrate
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Abstract
The invention discloses a kind of flexible multifrequency antenna based on polyimide material, medium substrate including rectangular apertures, radiation patch, earth plate and feeding network, the specification of the medium substrate is 70mm × 70mm × 0.2mm, it is made up of polyimide material, the earth plate is covered in the medium substrate side, the middle part of the earth plate is provided with U-shaped space, the U-shaped space is combined by rectangular apertures and hemispherical cavities to be formed, the radiation patch is arranged on inside the U-shaped space, radiation patch is to combine the U-shaped structure formed by rectangular radiation patch and semicircle radiation patch, the bottom of the radiation patch is connected with the feeding network.The use of polyimide material of the present invention so that aerial radiation paster deformation and can remain normal service behaviour under complex environment with the deformation of medium substrate.
Description
Technical field
The present invention relates to field of antenna, more particularly to a kind of flexible multifrequency antenna based on polyimide material.
Background technology
In recent years, the Mirae Corp. such as such as wearable device, flexible microelectronic product and flexible integration circuit obtains
The very big attention of society.To develop the wireless communication system that can be integrated among flexible material, for flexible antennas in design
There is great lifting with the demand of flexible passive device.Based on different flexible materials, such as polymeric liquid crystal copolymer
(LCP), PEI (PEI), a variety of Antenna Designs of polyethylene terephthalate (PET) have been suggested.These
Material has the radiofrequency characteristicses of uniqueness, such as low dielectric constant and loss tangent angle.Recently, polyimides (Polyimide) because
It is widely used in making the medium substrate of flexible apparatus for its excellent mechanically and electrically performance.
In addition, in current wireless communication field, the development of communication equipment more they tends to integration and miniaturization, therefore multifrequency
The application of technology is more and more extensive.For example, wide variety of Bluetooth, wireless local area network band in life, these are required
There is the antenna of the wireless devices such as mobile phone double frequency, three frequencies, even more multi-frequency to share an antenna.
The content of the invention
The invention aims to overcome deficiency of the prior art, there is provided a kind of flexibility based on polyimide material
Multifrequency antenna.Pass through the use of polyimide material so that aerial radiation paster can be with medium base under complex environment
The deformation of plate and deformation simultaneously remain normal service behaviour.
The purpose of the present invention is achieved through the following technical solutions：
A kind of flexible multifrequency antenna based on polyimide material, including the medium substrate of rectangular apertures, radiation patch, connect
Floor and feeding network, the specification of the medium substrate is 70mm × 70mm × 0.2mm, is made up of polyimide material,
The earth plate is covered in the medium substrate side, and the middle part of the earth plate is provided with U-shaped space, and the U-shaped space is by square
Shape space and hemispherical cavities combination are formed, and the radiation patch is arranged on inside the U-shaped space, and radiation patch is by rectangle
The U-shaped structure that radiation patch and the combination of semicircle radiation patch are formed, the bottom of the radiation patch and the feeding network phase
Even.
Further, the relative dielectric constant of the medium substrate is 3.5, and dielectric loss tangent value is 0.008.
Further, the size range of the rectangular apertures is (40~50) mm × (20~25) mm.
Further, the size range of the hemispherical cavities is 20~25mm.
Further, the size range of the semicircle radiation patch is 10~15mm.
Further, the distance between the feeding network and earth plate are 0.15~0.35mm.
Compared with prior art, beneficial effect caused by technical scheme is：
1. by continuous modification and optimization to radiation patch shape and size, inventive antenna can be in 3.6-
Receiving and transmitting signal in tri- frequency ranges of 4.6GHz, 5.7-8.8GHz and 9.5-10.7GHz, effectively reduce the antenna number of communication equipment
Amount.
2. simulation result shows, inventive antenna is in two sections of working bands, and return loss is below -10dB, impedance
Matching degree is good, while ensure that the service behaviour of antenna in the bent state, meets flexible wearable and multi-frequency working
Demand.
Brief description of the drawings
Fig. 1 is the overlooking the structure diagram of the present invention.
Fig. 2 is the side structure schematic view of the present invention.
Fig. 3 is the physical dimension schematic diagram of the specific embodiment of the invention.
The return loss simulation result of Fig. 4 inventive antennas.
Fig. 5 (a), Fig. 5 (b) and Fig. 5 (c) are inventive antenna respectively at tri- frequencies of 4GHz, 7.5GHz and 10.2GHz
Antenna pattern.
Fig. 6 is by inventive antenna actual measurement return loss plot after bending.
Reference：1- medium substrates, 2- earth plates, 3- feeding networks, 4- radiation patch, 5-U shapes space
Embodiment
The invention will be further described below in conjunction with the accompanying drawings.
As depicted in figs. 1 and 2, a kind of broad-band antenna based on coplanar wave guide feedback, the medium substrate of rectangular apertures is included
1, medium substrate 1 is made up of polyimide material, and its relative dielectric constant is 3.5, and its dielectric loss tangent value is 0.008.It is poly-
Acid imide has excellent heat endurance, chemical resistance and mechanical performance as a kind of high polymer material.Polyimides
It is stable to learn property, polyimides need not add fire retardant and prevent from burning.In addition, there is higher tensile strength, it is applicable
In the making of flexible material.To realize antenna flexible, the present embodiment have selected the polyimide material that thickness is 0.2mm
As medium substrate, and the radiation patch 4 of antenna and earth plate 2 are all presently the most conventional copper product.
The present invention uses coplanar wave guide feedback structure, and is single-sided structure, radiation patch 2, earth plate 4 and feeding network 3
In the same side, the overall dimensions of antenna are 70mm × 70mm × 0.2mm.The covering of earth plate 2 is arranged on the top of medium substrate 1, connects
The middle part on floor 2 is provided with U-shaped space 5, and U-shaped space 5 is combined by rectangular apertures and hemispherical cavities and formed, and radiation patch 4 is set
Inside the U-shaped space 5.The shape of radiation patch 4 is as shown in figure 1, radiation patch 4 is by rectangular radiation patch and semicircle spoke
Penetrate the U-shaped structure of patch combination composition.Feeding network 3 is connected with the bottom of radiation patch 4, and input impedance is 50 Ω, real well
Impedance matching is showed.The distance between feeding network 3 described in the present embodiment and earth plate 2 are 0.25mm.
As shown in Figure 3：The figure shows be dimensional drawing of the present embodiment antenna after optimization design, specific dimensional parameters
It is as follows：
L1=70mm, L2=46.5mm, L3=24.5mm, L4=34mm, L5=34mm, L6=1.5mm, L7=
0.25mm, H1=70mm, H2=23.25mm, H3=12.25mm, H4=25mm, R1=23.25mm, R2=12.25mm, medium
Substrate thickness is 0.2mm.
Further, using full-wave electromagnetic simulation software HFSS, respectively to the return loss of antenna, antenna pattern and
Three aspects of performance test are emulated and optimized under antenna bending condition.
Fig. 4 is the return loss plot figure of antenna.The antenna possesses three resonance bands, in 3.6-4.6GHz, 5.7-
Return loss is less than -10dB in tri- frequency ranges of 8.8GHz and 9.5-10.7GHz, and total bandwidth reaches 5.3GHz, in 4GHz, 7.5GHz
And the return loss value at 10.2GHz has respectively reached -17dB, 23dB, -14dB, the working characteristics of multifrequency antenna is met.
Fig. 5 (a) to Fig. 5 (c) is radiation side of the multifrequency antenna at tri- frequencies of 4GHz, 7.5GHz and 10.2GHz
Xiang Tu.It can be seen that antenna has stable omnidirectional radiation characteristic by three width figures, can omnidirectional radiation in three frequency ranges
Signal.
Fig. 6 is the actual measurement return loss plot that the antenna works in the case of bending.By with antenna in nonego case of bending
Lower contrast, it can be seen that the working frequency range of antenna has offset, and return loss is improved, but substantially meets basic multiple-frequency operation
Performance.Because 0.2mm thickness make it that antenna structure in bending is not in serious dilatation, electricity can be ensured
Flow normal homogeneous distribution.In addition, the mechanical property of polyimides stabilization also causes antenna to have the recovery capability after deformation.
The present invention is not limited to embodiments described above.The description to embodiment is intended to describe and said above
Bright technical scheme, above-mentioned embodiment is only schematical, is not restricted.This is not being departed from
In the case of invention objective and scope of the claimed protection, one of ordinary skill in the art may be used also under the enlightenment of the present invention
The specific conversion of many forms is made, these are belonged within protection scope of the present invention.
Claims (6)
1. a kind of flexible multifrequency antenna based on polyimide material, including the medium substrate of rectangular apertures, radiation patch, ground connection
Plate and feeding network, it is characterised in that the specification of the medium substrate is 70mm × 70mm × 0.2mm, by polyimides
Material is formed, and the earth plate is covered in the medium substrate side, and the middle part of the earth plate is provided with U-shaped space, the U-shaped
Space is combined by rectangular apertures and hemispherical cavities and formed, and the radiation patch is arranged on inside the U-shaped space, radiation patch
It is that the U-shaped structure formed, the bottom of the radiation patch and the feedback are combined by rectangular radiation patch and semicircle radiation patch
Electric network is connected.
A kind of 2. flexible multifrequency antenna based on polyimide material according to claim 1, it is characterised in that the medium
The relative dielectric constant of substrate is 3.5, and dielectric loss tangent value is 0.008.
A kind of 3. flexible multifrequency antenna based on polyimide material according to claim 1, it is characterised in that the rectangle
The size range in space is (40~50) mm × (20~25) mm.
A kind of 4. flexible multifrequency antenna based on polyimide material according to claim 1, it is characterised in that the semicircle
The size range in shape space is 20~25mm.
A kind of 5. flexible multifrequency antenna based on polyimide material according to claim 1, it is characterised in that the semicircle
The size range of shape radiation patch is 10~15mm.
A kind of 6. flexible multifrequency antenna based on polyimide material according to claim 1, it is characterised in that the feed
The distance between network and earth plate are 0.15~0.35mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710591035.0A CN107546477A (en) | 2017-07-19 | 2017-07-19 | A kind of flexible multifrequency antenna based on polyimide material |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710591035.0A CN107546477A (en) | 2017-07-19 | 2017-07-19 | A kind of flexible multifrequency antenna based on polyimide material |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107546477A true CN107546477A (en) | 2018-01-05 |
Family
ID=60970171
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710591035.0A Pending CN107546477A (en) | 2017-07-19 | 2017-07-19 | A kind of flexible multifrequency antenna based on polyimide material |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109390686A (en) * | 2018-10-12 | 2019-02-26 | 天津大学 | A kind of wearable Miniaturisation ultra-wideband antenna based on polyimides |
| CN109546345A (en) * | 2018-10-12 | 2019-03-29 | 天津大学 | A kind of miniature ultra wide band hexagonal antenna dividing shape based on kock |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105356033A (en) * | 2015-11-19 | 2016-02-24 | 合肥工业大学 | 2.45-GHz flexible wearable antenna based on coplanar waveguide feed |
-
2017
- 2017-07-19 CN CN201710591035.0A patent/CN107546477A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105356033A (en) * | 2015-11-19 | 2016-02-24 | 合肥工业大学 | 2.45-GHz flexible wearable antenna based on coplanar waveguide feed |
Non-Patent Citations (1)
| Title |
|---|
| RAVI KUMAR THAKUR ; RATNESH KUMAR PANDEY ; T. SHANMUGANANTHAM: "CPW-fed bull head shaped UWB antenna for WiMAX/WLAN with band-notched characteristics", 《 2016 INTERNATIONAL CONFERENCE ON CIRCUIT, POWER AND COMPUTING TECHNOLOGIES (ICCPCT)》 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109390686A (en) * | 2018-10-12 | 2019-02-26 | 天津大学 | A kind of wearable Miniaturisation ultra-wideband antenna based on polyimides |
| CN109546345A (en) * | 2018-10-12 | 2019-03-29 | 天津大学 | A kind of miniature ultra wide band hexagonal antenna dividing shape based on kock |
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Application publication date: 20180105 |
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