CN107437651B - Deep-feeding type wireless energy transmission antenna - Google Patents
Deep-feeding type wireless energy transmission antenna Download PDFInfo
- Publication number
- CN107437651B CN107437651B CN201710352586.1A CN201710352586A CN107437651B CN 107437651 B CN107437651 B CN 107437651B CN 201710352586 A CN201710352586 A CN 201710352586A CN 107437651 B CN107437651 B CN 107437651B
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- Prior art keywords
- antenna
- groove
- rectangle
- wireless energy
- energy transmission
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/27—Adaptation for use in or on movable bodies
- H01Q1/273—Adaptation for carrying or wearing by persons or animals
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/36—Structural form of radiating elements, e.g. cone, spiral, umbrella; Particular materials used therewith
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/50—Structural association of antennas with earthing switches, lead-in devices or lightning protectors
Abstract
The deep feed type wireless energy transmission antenna is characterized in that a feed source port is arranged in the antenna; the outer contour of the antenna is rectangular, elliptical or polygonal. The feed port is located in the center of the geometry of the outer profile of the antenna. The outer contour of the antenna is rectangular, more than one groove, namely a first groove and a second groove, is recessed into the rectangle on two sides of the rectangle, a third groove recessed into the rectangle is arranged on the bottom of the rectangle, and the center of the recess of the third groove is a feed source opening. Due to the superposition effect of the magnetic fields generated by the current, the antenna designed by the method has stronger magnetic field distribution in a near field area.
Description
One, the technical field
The invention relates to an antenna, in particular to a deep-feed wireless energy transmission antenna.
Second, background Art
There are two main ways of wireless energy transmission to human implantable devices, low frequency coil mutual inductance and high frequency wire radiation. The invention provides a novel antenna which can improve the efficiency of high-frequency wireless energy transmission by more than one time.
A conventional loop antenna is shown in fig. 1 (a). As shown in fig. 1(a), the current of the conventional antenna is mainly distributed in the feed source and the place symmetrical to the feed source. The current distribution is as shown in fig. 2(a), and the strongest currents and the same direction are at the feed source (opening) and at the place symmetrical to the feed source, which results in that the electromagnetic fields generated by the currents weaken each other in the central area of the antenna. Although conventional loop antennas respond better in the far field. But such electromagnetic field distribution is not conducive to near field wireless energy transfer.
Third, the invention
The invention aims to provide a novel deep feed type wireless energy transmission antenna, and the electromagnetic field distribution of the antenna is beneficial to near-field wireless energy transmission.
The technical scheme of the invention is as follows: the deep feed type wireless energy transmission antenna is characterized in that a feed source port is arranged in the antenna; the outer contour of the antenna is rectangular, elliptical or polygonal. The feed port is located in the center of the geometry of the outer profile of the antenna.
The outline of a typical antenna is rectangular, both sides of the rectangle are provided with more than one groove, namely a first groove and a second groove, which are recessed inwards, the bottom of the rectangle is provided with a third groove recessed inwards, and the center of the recess of the third groove is provided with a feed source opening; the depth of the third groove is more than three times of the depth of the first groove and the second groove, and the width of the third groove is more than the width of the first groove and the second groove. The area of the third groove is 8% -35% of the area of the rectangle. Oval or polygonal shapes are fully referred to such formats.
The invention discloses a deep-feeding wireless energy transmission antenna. The greatest improvement over conventional antennas is that the feed port is internal. The outer profile of the antenna is rectangular, circular or other shape.
The current distribution of the deep feed antenna of the present invention is shown in fig. 2 (b). The electromagnetic fields generated by the strongest distributed currents of the antenna at the center of the antenna strengthen each other, which effectively improves the efficiency of wireless energy transmission.
Has the advantages that: fig. 1(b) shows a deep feed antenna according to the present invention. The advantage of this new antenna design is the variation of the current distribution over it. Another significant advantage of the novel design is that the antenna designed using this method has a strong magnetic field distribution in the near field region because of the superposition effect of the magnetic field generated by the current. The safety standard of human body receiving electromagnetic radiation mainly depends on the magnitude of the electric field intensity of the electromagnetic wave. Therefore, the novel antenna can transmit higher power on the premise of meeting the safety standard, so that the receiving power is improved, and the wireless charging speed is accelerated.
Description of the drawings
Fig. 1(a) a conventional loop antenna and fig. 1(b) a novel deep feed antenna;
fig. 2(a) shows the current distribution on the conventional loop antenna and fig. 1(b) shows the current distribution on the novel deep feed antenna;
FIG. 3 shows the electromagnetic field distribution of the novel deep-feed antenna;
fig. 4 is a plane shape of the novel deep feed antenna applied to the implantable device, and the planar shape can be deformed after being attached to the surface of the implantable device.
FIG. 5(a) is a schematic diagram of wireless energy transmission, FIG. 5(b) is an actual measurement device;
fig. 6 shows that the novel antenna can increase the collected power by more than 100% (3dB) compared to the conventional antenna.
Fifth, detailed description of the invention
From the comparison between the shapes of the conventional loop antenna in fig. 1(a) and the novel deep-feed antenna in fig. 1(b), the current distribution on the conventional loop antenna in fig. 2(a) and the novel deep-feed antenna in fig. 2(b) can be clearly distinguished.
The simulated electromagnetic field distribution of the novel deep feed antenna is shown in figure 3. Fig. 3 shows that the electromagnetic field distribution of the central region of the novel antenna is extremely strong, and the novel antenna is very suitable for wireless energy transmission. A typical antenna designed using the novel method is shown in fig. 4 and is made from a metal foil. The antenna can be flexibly mounted on an implantable device. The antenna can be designed into other shapes to be arranged in implantable devices with different specifications according to requirements.
A wireless energy transmission method implemented by the antenna design method is shown in fig. 5 (a). Smaller implantable devices are placed in the body for receiving wireless energy, and larger antennas can be attached to the body surface for transmitting wireless energy. The actual measurement apparatus in the laboratory is shown in FIG. 5 (b). Experimental results show that, as shown in fig. 6, compared with a conventional antenna, the antenna designed by using the novel method can improve the efficiency of the whole wireless energy transmission system by more than 100%.
Claims (1)
1. The deep feed type wireless energy transmission antenna is characterized in that a feed source port is arranged in the antenna; the outer contour of the antenna is rectangular; the feed source port is positioned in the center of the geometric shape of the outer contour of the antenna; the outer contour of the antenna is rectangular, both sides of the rectangle are provided with more than one groove, namely a first groove and a second groove, which are recessed towards the inside of the rectangle, the bottom of the rectangle is provided with a third groove recessed towards the inside of the rectangle, and the center of the concave part of the third groove is provided with a feed source opening; the depth of the third groove is more than three times of the depth of the first groove and the second groove, and the width of the third groove is more than the width of the first groove and the second groove; the area of the third groove is 8% -35% of the area of the rectangle.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710352586.1A CN107437651B (en) | 2017-05-18 | 2017-05-18 | Deep-feeding type wireless energy transmission antenna |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710352586.1A CN107437651B (en) | 2017-05-18 | 2017-05-18 | Deep-feeding type wireless energy transmission antenna |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107437651A CN107437651A (en) | 2017-12-05 |
| CN107437651B true CN107437651B (en) | 2021-09-03 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710352586.1A Active CN107437651B (en) | 2017-05-18 | 2017-05-18 | Deep-feeding type wireless energy transmission antenna |
Country Status (1)
| Country | Link |
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| CN (1) | CN107437651B (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7463197B2 (en) * | 2005-10-17 | 2008-12-09 | Mark Iv Industries Corp. | Multi-band antenna |
| CN201278365Y (en) * | 2008-09-24 | 2009-07-22 | 中兴通讯股份有限公司 | Electronic label and antenna thereof |
| CN203288735U (en) * | 2013-04-28 | 2013-11-13 | 杭州中瑞思创科技股份有限公司 | UHF frequency band RFID tag |
| CN106374218A (en) * | 2016-09-14 | 2017-02-01 | 北京邮电大学 | RFID (Radio Frequency Identification) near-field reader-writer antenna |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2003096478A1 (en) * | 2002-04-25 | 2003-11-20 | Cet Technologies Pte Ltd | An antenna |
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2017
- 2017-05-18 CN CN201710352586.1A patent/CN107437651B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7463197B2 (en) * | 2005-10-17 | 2008-12-09 | Mark Iv Industries Corp. | Multi-band antenna |
| CN201278365Y (en) * | 2008-09-24 | 2009-07-22 | 中兴通讯股份有限公司 | Electronic label and antenna thereof |
| CN203288735U (en) * | 2013-04-28 | 2013-11-13 | 杭州中瑞思创科技股份有限公司 | UHF frequency band RFID tag |
| CN106374218A (en) * | 2016-09-14 | 2017-02-01 | 北京邮电大学 | RFID (Radio Frequency Identification) near-field reader-writer antenna |
Non-Patent Citations (1)
| Title |
|---|
| Flexible meandered loop antenna for implants in MedRadio and ISM bands;R. Alrawashdeh等;《ELECTRONICS LETTERS》;20131130;第1515-1517页 * |
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| Publication number | Publication date |
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| CN107437651A (en) | 2017-12-05 |
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