CN210516988U - Combined plane oscillator near-field antenna - Google Patents
Combined plane oscillator near-field antenna Download PDFInfo
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- CN210516988U CN210516988U CN201921971695.2U CN201921971695U CN210516988U CN 210516988 U CN210516988 U CN 210516988U CN 201921971695 U CN201921971695 U CN 201921971695U CN 210516988 U CN210516988 U CN 210516988U
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Abstract
A combined plane oscillator near-field antenna comprises a radiator PCB, a microstrip circuit feed PCB and a vertical feed metal column for connecting the radiator PCB and the microstrip circuit feed PCB; the upper surface of the radiator PCB is provided with a combined planar radiation vibrator, the combined planar radiation vibrator comprises a plurality of metal copper foils, and each metal copper foil is provided with a welding via hole; a microstrip distribution circuit is arranged on the microstrip circuit feed PCB board, and a microstrip feed port and a plurality of metal feed column feed points are arranged on the microstrip distribution circuit; compared with the prior art, the beneficial effects of the utility model reside in that: the combined planar radiation oscillator is used as a basic radiator, a large-area stable near-field radiation area is easy to realize, each metal copper foil is connected by adopting an independent metal feed column feed point, and a corresponding feed phase and a feed level with equal amplitude are sequentially configured by utilizing a microstrip distribution circuit so as to realize the circular polarization working characteristic.
Description
[ technical field ] A method for producing a semiconductor device
The utility model relates to an antenna technology field, specificly relate to a modular plane oscillator near field antenna.
[ background of the invention ]
The wide application of Radio Frequency Identification (RFID) product technology directly promotes the rapid development of near-field antenna technology, and unlike conventional far-field antennas, the application of near-field antennas in the ultra-high frequency band has more special technical requirements, and its characteristics can be roughly summarized as: (1) the physical distance between the read-write electronic tag (namely the identified object) and the read-write antenna is very close, and the field intensity distribution of the near field excited by the antenna is required to be stable and uniform; (2) the gain of the far field of the antenna is not too large, otherwise, nearby articles can be misread and interference is caused to nearby shelves; (3) the electronic tags are generally placed in any direction, and the read-write antenna generally needs to adopt a circular polarization working mode to acquire stable read-write signals and avoid the phenomenon of missing reading as much as possible; (4) the electronic tag articles to be read and written are densely arranged in a relatively large display area, the coverage capacity of a single-element antenna is exceeded, multiple elements are needed to be adopted, and an antenna array is formed in a proper mode to effectively expand the range of a readable and writable area; (5) the mounting space of the read-write antenna on various goods shelves is extremely limited, and a compact and efficient antenna structure needs to be adopted to reduce the overall size of the antenna.
For the above application requirements, the design of the near-field antenna has technical difficulties that various factors are mutually restricted, for example: the key of the near-field antenna design technology is that a multi-element array, the stability of near-field performance, the suppression of far-field gain, the realization of circular polarization, the control of the complexity of a feed circuit and the like need to be realized in a limited size space, a more reasonable technical mode is selected, and a general scheme with various requirements is balanced.
In view of the above, there is a need for a combined planar element near-field antenna to overcome the deficiencies of the prior art.
[ Utility model ] content
The utility model aims at providing a combined plane oscillator near field antenna adopts the combined plane radiation oscillator as the basic radiator, easily realizes the stable near field radiation area of great area to each metal copper foil adopts independent metal feed post feed point to connect, utilizes microstrip distribution circuit to dispose corresponding feed phase place and feed level of constant amplitude in proper order, in order to realize the circular polarization working characteristic; the whole structure is compact and practical, and the requirements of near-field antenna design and application are well met.
In order to achieve the above object, the present invention provides a combined planar dipole near field antenna, which comprises a radiator PCB, a microstrip circuit feed PCB, and a vertical feed metal post connecting the radiator PCB and the microstrip circuit feed PCB;
the upper surface of the radiator PCB is provided with a combined planar radiation vibrator, the combined planar radiation vibrator comprises a plurality of metal copper foils, and each metal copper foil is provided with a welding via hole; the PCB comprises a radiating body PCB and a vertical feed metal column, wherein a micro-strip circuit feed PCB board is provided with a micro-strip distribution circuit, the micro-strip distribution circuit is provided with a micro-strip feed port and a plurality of metal feed column feed points, each metal feed column feed point is overlapped with the center of the projection of the corresponding welding via hole in the vertical direction, one end of the vertical feed metal column is welded on the metal feed column feed point, and the other end of the vertical feed metal column penetrates through the welding via hole corresponding to the metal feed column feed point behind the radiating body PCB board and is electrically connected.
In a preferred embodiment, the microstrip distribution circuit is composed of a microstrip power distribution circuit, a microstrip phase shift circuit and an impedance matching circuit.
In a preferred embodiment, the plurality of metallic copper foils are distributed in a polar axis array.
In a preferred embodiment, the metallic copper foil has a rectangular shape.
In a preferred embodiment, the microstrip circuit feed PCB board is provided with 2 microstrip distribution circuits connected in parallel, the upper surface of the radiator PCB board is provided with 2 groups of combined planar radiation oscillators, one end of the vertical feed metal column is welded on the feed point of the metal feed column, and the other end of the vertical feed metal column penetrates through the welding via hole corresponding to the feed point of the metal feed column after passing through the radiator PCB board.
Compared with the prior art, the utility model provides a pair of modular plane oscillator near field antenna's beneficial effect lies in: the combined planar radiation oscillator is used as a basic radiator, a large-area stable near-field radiation area is easy to realize, each metal copper foil is connected by adopting an independent metal feed column feed point, and a corresponding feed phase and a feed level with equal amplitude are sequentially configured by utilizing a micro-strip distribution circuit so as to realize the circular polarization working characteristic; the whole structure is compact and practical, and the requirements of near-field antenna design and application are well met.
[ description of the drawings ]
Fig. 1 is a perspective view of the combined type plane oscillator near-field antenna provided by the present invention.
Fig. 2 is an exploded view of the combined planar element near field antenna of fig. 1.
Fig. 3 is a top view of the microstrip circuit feed PCB board shown in fig. 1.
Fig. 4 is an exploded view of a combined planar dipole near-field antenna according to a preferred embodiment of the present invention.
[ detailed description ] embodiments
In order to make the above objects, features and advantages of the present invention more comprehensible, embodiments of the present invention are described in detail below with reference to the accompanying drawings. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. The present invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein, as those skilled in the art will be able to make similar modifications without departing from the spirit and scope of the present invention.
It will be understood that when an element is referred to as being "secured to" or "disposed on" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "left," "right," and the like as used herein are for illustrative purposes only and do not represent the only embodiments.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used herein in the description of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention.
Referring to fig. 1 to 3, the present invention provides a combined planar dipole near-field antenna 100.
In the embodiment of the present invention, the combined planar dipole near field antenna 100 includes a radiator PCB 10, a microstrip circuit feeding PCB 20 and a vertical feeding metal pillar 30 connecting the radiator PCB 10 and the microstrip circuit feeding PCB 20.
Specifically, the upper surface of the radiator PCB board 10 is provided with a combined planar radiation oscillator 11, the combined planar radiation oscillator 11 includes a plurality of metal copper foils 111, the metal copper foils 111 are distributed in a polar axis array, the metal copper foils 111 are rectangular, and each metal copper foil 111 is provided with a welding via hole 1111; be equipped with microstrip distribution circuit 21 on microstrip circuit feed PCB board 20, be equipped with microstrip feed port 211 and a plurality of metal feed post feed point 212 on the microstrip distribution circuit 21, every metal feed post feed point 212 and the projected center coincidence of a welding via hole 1111 that corresponds in the vertical direction, the one end welding of perpendicular feed metal post 30 on the metal feed post feed point 212 and the other end pass with behind the irradiator PCB board 10 with the welding via hole 1111 electricity that metal feed post feed point 212 corresponds is connected.
It can be understood that the combined planar radiating element 11 on the radiator PCB 10 can form a relatively single stable near-field radiation pattern on the upper surface of the combined planar radiating element in the short-distance radiation area, which is beneficial to the performance of the near-field antenna. The microstrip distribution circuit 21 is composed of a traditional microstrip power distribution circuit, a microstrip phase shift circuit and an impedance matching circuit, and the ground plane of the microstrip PCB simultaneously plays a role of an antenna reflection plate, and due to the close arrangement structural characteristics of the combined planar radiation oscillators 11, 4 independent combined planar radiation oscillators 11 have large capacitive coupling with each other, and also have strong capacitive reactance with the antenna reflection plate. The impedance matching circuit is designed and operated on the principle that capacitive reactance is eliminated and impedance within an operating bandwidth is kept to be matched with 50 omega; the design principle of the microstrip phase shift circuit is that 90-degree phase difference configuration is carried out on the feed phase of a feed column in sequence, for example: the feed point 1 is 0 degree, the feed point 2 is 90 degrees, the feed point 3 is 180 degrees, and the feed point 4 is 270 degrees, so as to meet the phase condition for realizing circular polarization feed; the design principle of the microstrip power dividing circuit is to perform constant-amplitude feeding on 4 metal feeding columns, namely a conventional constant-amplitude 1-to-4 power dividing circuit is used for meeting the amplitude requirement of circular polarization feeding. The design and application technology of the microstrip circuit is a very mature public technology, the copper foil routing pattern of the microstrip circuit shown in fig. 3 is only used as a practical application example for reference, the specific size of the microstrip circuit is affected by various factors such as practical PCB board parameters, antenna structure parameters, antenna working frequency and the like, and the microstrip circuit does not have a unique corresponding relation with the near-field antenna technology disclosed by the patent, and technicians in the technical field of radio frequency antennas can accurately understand, design and apply the microstrip circuit according to the design principle.
The combined plane oscillator near-field antenna 100 adopts the combined plane radiation oscillator 11 as a basic radiator, is easy to realize a stable near-field radiation area with a large area, and each metal copper foil 111 is connected by adopting an independent metal feed column feed point 212, and a corresponding feed phase and a feed level with equal amplitude are sequentially configured by utilizing the microstrip distribution circuit 21 so as to realize the circular polarization working characteristic; the whole structure is compact and practical, and the requirements of near-field antenna design and application are well met.
Referring to fig. 4, in a preferred embodiment, by using the above-mentioned technical solution of the combined planar element near-field antenna 100, in practical applications, the stable expansion of the working area of the near-field antenna can be flexibly realized through array combination, so as to further illustrate the realizability and practicability of the technology of this patent.
Specifically, be equipped with 2 microstrip distribution circuit 21 that connect in parallel each other on microstrip circuit feed PCB board 20, the lower surface of irradiator PCB board 10 is equipped with 2 groups of combination formula plane radiation oscillator 11, the one end welding of perpendicular feed metal column 30 on the metal feed column feed point 212 and the other end pass with behind the irradiator PCB board 10 with the welding via hole 1111 electricity that metal feed column feed point 212 corresponds is connected.
It should be noted that, copying and translating the added feed post port should keep the same phase and equal amplitude signal level as the original feed post port, so as to keep the circular polarization performance and near field performance of the extended antenna. By copying and translating the microstrip distribution circuit 21, and correspondingly extending the size and area of the radiator PCB 10 and the microstrip circuit feed PCB 20 and the number of the metal feed post feed points 212, a larger rectangular antenna working area can be conveniently realized for reading and writing electronic tag articles in a wider area, and the combined planar oscillator near-field antenna 100 generally has a flat structure.
It will be appreciated that in a similar manner, the combined planar radiator element 11 is formed by rotationally replicating (including but not limited to, for example, 3, 4, 6, 8, etc.) an arrangement of metallic copper foils 111 from a substantially planar pattern. By adopting a similar method, 4, 5, 6, 8 and other microstrip distribution circuits 21 connected in parallel can be further arranged on the microstrip circuit feed PCB board 20, and the above technical scheme is also applicable to a far field antenna, and for a person skilled in the art, a plurality of variations and improvements can be made without departing from the concept of the present invention, and these all belong to the protection scope of the present technical scheme.
Compared with the prior art, the utility model provides a pair of modular plane oscillator near field antenna's beneficial effect lies in: the combined planar radiation oscillator is used as a basic radiator, a large-area stable near-field radiation area is easy to realize, each metal copper foil is connected by adopting an independent metal feed column feed point, and a corresponding feed phase and a feed level with equal amplitude are sequentially configured by utilizing a micro-strip distribution circuit so as to realize the circular polarization working characteristic; the whole structure is compact and practical, and the requirements of near-field antenna design and application are well met.
The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.
The above-mentioned embodiments only represent some embodiments of the present invention, and the description thereof is specific and detailed, but not to be construed as limiting the scope of the present invention. It is therefore to be understood that within the scope of the appended claims, the invention may be practiced otherwise than as specifically described.
Claims (5)
1. The utility model provides a modular plane oscillator near field antenna which characterized in that: the antenna comprises a radiator PCB, a microstrip circuit feed PCB and a vertical feed metal column for connecting the radiator PCB and the microstrip circuit feed PCB;
the upper surface of the radiator PCB is provided with a combined planar radiation vibrator, the combined planar radiation vibrator comprises a plurality of metal copper foils, and each metal copper foil is provided with a welding via hole; the PCB comprises a radiating body PCB and a vertical feed metal column, wherein a micro-strip circuit feed PCB board is provided with a micro-strip distribution circuit, the micro-strip distribution circuit is provided with a micro-strip feed port and a plurality of metal feed column feed points, each metal feed column feed point is overlapped with the center of the projection of the corresponding welding via hole in the vertical direction, one end of the vertical feed metal column is welded on the metal feed column feed point, and the other end of the vertical feed metal column penetrates through the welding via hole corresponding to the metal feed column feed point behind the radiating body PCB board and is electrically connected.
2. The combined planar element near field antenna of claim 1, wherein: the microstrip distribution circuit consists of a microstrip power distribution circuit, a microstrip phase shift circuit and an impedance matching circuit.
3. The combined planar element near field antenna of claim 1, wherein: the metal copper foils are distributed in a polar axis array.
4. The combined planar element near field antenna of claim 3, wherein: the metal copper foil is rectangular.
5. The combined type plane element near-field antenna of any one of claims 1-4, wherein: the PCB comprises a radiating body PCB and a metal feed column, wherein the radiating body PCB is provided with 2 microstrip circuit distribution circuits which are connected in parallel, the upper surface of the radiating body PCB is provided with 2 groups of combined planar radiating vibrators, one end of the vertical feed metal column is welded on a feed point of the metal feed column, and the other end of the vertical feed metal column penetrates through a welding through hole which is corresponding to the feed point of the metal feed column and is electrically connected with the radiating body PCB.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921971695.2U CN210516988U (en) | 2019-11-15 | 2019-11-15 | Combined plane oscillator near-field antenna |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921971695.2U CN210516988U (en) | 2019-11-15 | 2019-11-15 | Combined plane oscillator near-field antenna |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111653877A (en) * | 2020-05-25 | 2020-09-11 | 中国电子科技集团公司第二十研究所 | Efficient energy skin framework |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111653877A (en) * | 2020-05-25 | 2020-09-11 | 中国电子科技集团公司第二十研究所 | Efficient energy skin framework |
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