CN105375099A - A two-frequency band antenna and a signal transmitting and receiving method of the antenna - Google Patents
A two-frequency band antenna and a signal transmitting and receiving method of the antenna Download PDFInfo
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- CN105375099A CN105375099A CN201510623338.7A CN201510623338A CN105375099A CN 105375099 A CN105375099 A CN 105375099A CN 201510623338 A CN201510623338 A CN 201510623338A CN 105375099 A CN105375099 A CN 105375099A
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- radiating element
- microstrip
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- medium substrate
- signal
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/48—Earthing means; Earth screens; Counterpoises
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/12—Supports; Mounting means
- H01Q1/22—Supports; Mounting means by structural association with other equipment or articles
- H01Q1/2208—Supports; Mounting means by structural association with other equipment or articles associated with components used in interrogation type services, i.e. in systems for information exchange between an interrogator/reader and a tag/transponder, e.g. in Radio Frequency Identification [RFID] systems
- H01Q1/2216—Supports; Mounting means by structural association with other equipment or articles associated with components used in interrogation type services, i.e. in systems for information exchange between an interrogator/reader and a tag/transponder, e.g. in Radio Frequency Identification [RFID] systems used in interrogator/reader equipment
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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
- H01Q1/38—Structural form of radiating elements, e.g. cone, spiral, umbrella; Particular materials used therewith formed by a conductive layer on an insulating support
Abstract
The invention relates to a two-frequency band antenna for a microwave radio frequency identification reader-writer and a signal transmitting and receiving method of the antenna. The two-frequency band antenna comprises a dielectric substrate. As the substrate, the dielectric substrate is provided with a radiation unit, a metal floor, a bent micro-strip feeder line and an SMA connector. The radiation unit is attached to one side of the dielectric substrate and the metal floor is attached to the other side of the dielectric substrate. The radiation unit and the dielectric substrate have no projection coincidence on a horizontal plane. The bent micro-strip feeder line and the metal floor are symmetrically attached to two sides of the dielectric substrate. The bent micro-strip feeder line connects the radiation unit and the SMA connector. The technical solution is applicable to multi-application microwave radio frequency identification reader-writer antennas.
Description
Technical field
The present invention relates to microwave radio recognition technology field, relate to the signal transmitting of a kind of two band antennas for microwave radio identification read write line and antenna, method of reseptance.
Background technology
Microwave radio identification (MicrowaveRFID) technology comprises unique identifying information to be stored in chip, and use radio-frequency (RF) identification, tracking or management to be attached to the technology of the object of this chip.The feature that microwave radio identification (MicrowaveRFID) technology has that accuracy is high, memory space is large, anti-adverse environment, fail safe are high, be widely used in production, logistics, traffic, the field such as false proof, along with correlation technique constantly improve and ripe, microwave radio identification (MicrowaveRFID) technology demonstrates huge development potentiality and application space, will become a basic technology of Future Information social construction.
Microwave radio identification (MicrowaveRFID) system comprises read write line, electronic tag and background computer network three parts.Wherein, dependence antenna is contacted between read write line and electronic tag.Read write line utilizes its own antenna to electronic tag transmitting energy, sequential and information, and label also utilizes its own antenna to read write line return information simultaneously.Therefore, the antenna of high-performance high-gain is most important for whole microwave radio identification MicrowaveRFID system.
Due in different areas and in different applications, the working band of microwave radio identification MicrowaveRFID system is not identical.Therefore, radio-frequency identification reader/writer designs a multiband antenna and can solve the difficult problem utilizing a read write line to read and write multiple working frequency range label.
Existing microwave radio identification reading and writing device antenna simply can be divided into following two kinds.
The first is: the reading and writing device antenna of single working frequency range.According to the above description, this type of read write line can not read and write the label of multiple working frequency range, has certain limitation.
The second is: the reading and writing device antenna that there is minority multiband, but major part exists the deficiency that gain is little or size is large, only there is only a few to be designed to high-performance and the reading and writing device antenna of 2.45GHz--2.400 to 2.483GHz and 5.8GHz--5.725 to 5.875GHz microwave radio identification frequency range can be covered.Dual-band antenna of the prior art adopts a longer dipole antenna to use as 2.45GHz, the dipole antenna of shorter a pair is as 5.8GHz, connect with microstrip line between two frequency ranges, and make above-mentioned all structures coplanar and be attached at medium substrate upper surface; The gain under 2.45GHz frequency of this antenna is 8dBi, and under 5.8GHz frequency, gain is 9-10dBi, and thus gain is high, but its Horizon panel outside dimension is 43 × 26 × 12mm
3, therefore its size is more greatly and be not easily integrated in read write line.Or dual-band antenna is the microstrip-fed bending paster antenna that a ground level strip has stub, and it is of a size of 35 × 50 × 1.6mm
3, therefore size is less, but its gain under 2.45GHz frequency is that under 2.27dBi, 5.8GHz frequency, gain is 2.99dBi, therefore its gain is lower.
To sum up, described two kinds of reading and writing device antennas all can not well as the microwave radio identification reading and writing device antenna of many application.
Summary of the invention
Technical problem to be solved by this invention is to provide signal transmitting, the method for reseptance of a kind of two band antennas for microwave radio identification read write line and antenna, can be applicable to the microwave radio identification reading and writing device antenna of many application.
The technical scheme that the present invention solves the problems of the technologies described above is as follows: a kind of two band antennas for microwave radio identification read write line, comprise medium substrate, medium substrate is as substrate, be provided with radiating element, metal ground, bend microstrip-fed line and sub-miniature A connector, radiating element is attached to the one side of medium substrate, be attached to the another side of medium substrate metal, and radiating element and medium substrate overlap without projecting in the horizontal plane, symmetry is attached on two faces of medium substrate with bending microstrip-fed line and metal, and bend microstrip-fed line radiating element is connected with sub-miniature A connector,
When two band antennas are used for Received signal strength:
Radiating element, for responding to and the signal of transmitted tag in received RF recognition system and energy, and passes to the microstrip-fed line of bending;
Bend microstrip-fed line, for receiver radiation unit send signal and energy and with metal be coupled after be sent to sub-miniature A connector;
Sub-miniature A connector, processes for the signal that sent by the microstrip-fed line of bending and the energy transferring radio circuit to read write line;
When two band antennas are used for transmitting:
Sub-miniature A connector, is sent to the microstrip-fed line of bending for the signal of the radio circuit process by read write line and energy;
Bend microstrip-fed line, for receive sub-miniature A connector launch signal and energy and with metal be coupled after send to radiating element;
Radiating element, for receiving signal and energy that the microstrip-fed line of bending sends and being radiated to space.
On the basis of technique scheme, the present invention can also do following improvement:
Further, the microstrip-fed line of described bending is attached to the side of described medium substrate upper surface, and connected to form successively by microstrip line, the first broken line portion and the second broken line portion, described microstrip line is connected with radiator unit, and described second broken line portion is connected with sub-miniature A connector.
The beneficial effect of above-mentioned further scheme is adopted to be: repeatedly bent by the microstrip-fed line of bending and the size of antenna can be made greatly to reduce, the work that simultaneously also can play impedance transformation reduces in order to make return loss.
Further, described microstrip line and the first broken line portion composition " ┓ " shape, described second broken line portion and not conllinear parallel with described first broken line portion, a wherein long limit in described second broken line portion flushes with the broadside of described medium substrate.
The beneficial effect of above-mentioned further scheme is adopted to be: can antenna size be reduced, make it be easy to integrated.
Further, described microstrip line is the rectangular shape adopting copper product to make, the long 22.00mm of described microstrip line, wide 3.00mm;
Described first broken line portion is the rectangular shape adopting copper product to make, described first broken line minister 19.00mm, wide 3.00mm, and the broadside conllinear of wherein a long limit and the medium substrate upper surface of described broken line;
The beneficial effect of above-mentioned further scheme is adopted to be: can size be reduced, make this antenna be easy to integrated.
Described second broken line portion adopts the rectangular shape made of copper product, described second broken line minister 7.00mm, wide 3.00mm, and a wherein broadside in described second broken line portion and described medium substrate long limit conllinear and be less than the length of described medium substrate;
The long limit length of overlapped part in described first broken line portion and the second broken line portion is 3mm.
The beneficial effect of above-mentioned further scheme is adopted to be: can size be reduced, make this antenna be easy to integrated.
Further, described radiating element comprises described first radiating element, the second radiating element and described connecting portion, described first radiating element, the second radiating element and described connecting portion all adopt copper product and are attached to the opposite side of described medium substrate upper surface, and vertical connection does not intersect successively.
Further, described first radiating element is rectangular shape, one of them long limit of described first radiating element is with the broadside conllinear of described medium substrate and length is equal, and two broadsides of described first radiating element are respectively with two long limit conllinear of described medium substrate and width is less than the length of medium substrate;
Described connecting portion is rectangle, and one end of described connecting portion is connected with one end of described first radiating element, and described first radiating element and connecting portion form " L " shape;
Described second radiating element comprises the second radiator unit a connected vertically and the second radiator unit b, described second radiator unit a is vertical with described connecting portion connects to form " ┘ " shape, second radiator unit b is positioned at and is less than described second radiator unit b 1/2nd length place, is greater than the second radiator unit b part of the second radiator unit b 1/2nd length towards the first radiating element.
Further, the long 40.00mm of described first radiating element, wide 4.50mm; Described connection minister 4.50mm, wide 1.00mm.
The beneficial effect of above-mentioned further scheme is adopted to be: the transmission that can realize the wavelength signals of 2.45GHz frequency range.
Further, described medium substrate is adopt material to be the cuboid thin plate of FR4, the long 40.00mm of described medium substrate, wide 37.50mm.
The beneficial effect of above-mentioned further scheme is adopted to be: after bending microstrip-fed line, antenna length to be reduced, be easy to be integrated in small-sized read write line; This microstrip line also serves the effect of impedance transformation simultaneously, and return loss is reduced.
Further, the rectangular shape of described metal ground for being made up of copper product, described metal ground long 40.00mm, wide 19.00mm, and the long limit on described metal ground flushes with the corresponding sideline of described medium substrate;
Described sub-miniature A connector comprises the inner wire of signal transmission, the screen lead-out wire of shielding interference and screwed single-ended joint; This screen lead-out wire is connected with metal ground; This inner wire is connected with the second broken line portion; This screwed single-ended joint is connected with the radio circuit of read write line.
The present invention also provides a kind of signal transmitting and receiving method of two band antennas for microwave radio identification read write line,
When for Received signal strength, comprise the following steps:
The signal of transmitted tag and energy in radiating element induction and received RF recognition system, and pass to and bend microstrip-fed line;
Bend microstrip-fed line receiver radiation unit send signal and energy and with metal be coupled after be sent to sub-miniature A connector;
The signal that the microstrip-fed line of bending sends by sub-miniature A connector and energy transferring process to the radio circuit of read write line.
When for transmitting, comprise the following steps:
The signal of the radio circuit process of read write line and energy are sent to the microstrip-fed line of bending by sub-miniature A connector;
Bend microstrip-fed line receive sub-miniature A connector launch signal and energy and with metal be coupled after send to radiating element;
Radiating element receives signal and energy that the microstrip-fed line of bending sends and is radiated to space.
Compared with existing reading and writing device antenna, tool of the present invention has the following advantages:
1) shape of this antenna and structure make it have the characteristic of two frequency ranges, namely can use under 2.45GHz and 5.8GHz two operating frequencies, avoid the deficiency that single reader antenna can only read and write particular job frequency range label, expand the scope of application.
2) shape of this antenna and structure make it have the characteristic of high-gain, software emulation and experiment measuring show, the gain under 2.45GHz operating frequency of this antenna is 4.38dBi, and under 5.8GHz operating frequency, gain is 8.27dBi, therefore this antenna has higher gain.
3) size of this antenna is less, and the physical dimension of this antenna is only 37.50 × 40.00 × 1.60mm
3, be more easy to be integrated in read write line.
4) this antenna is without via hole and multi-layer sheet, and thus manufacturing process is simple, reduces production cost.
Accompanying drawing explanation
Fig. 1 is the structural representation of a kind of two band antennas for microwave radio identification read write line of the present invention;
Fig. 2 is a kind of two band antenna medium upper surface of base plate vertical views for microwave radio identification read write line of the present invention;
Fig. 3 is the schematic flow sheet of the signal acceptance method of a kind of two band antennas for microwave radio identification read write line of the present invention;
Fig. 4 is the schematic flow sheet of the signal transmitting method of a kind of two band antennas for microwave radio identification read write line of the present invention;
Fig. 5 is Comparative result figure the present invention two band antenna return loss being carried out to software emulation and actual measurement;
Fig. 6 is Comparative result figure the present invention two band antenna peak gain being carried out to software emulation and actual measurement.
In accompanying drawing, the list of parts representated by each label is as follows:
1, medium substrate, 2, radiating element, the 21, first radiating element, 22, the second radiating element, 211, the second radiator unit a, the 222, second radiator unit b, 23, connecting portion, 3, metal ground, 4, microstrip-fed line is bent, 41, microstrip line, the 42, first broken line portion, 43, the second broken line portion, 5, sub-miniature A connector.
Embodiment
Be described principle of the present invention and feature below in conjunction with accompanying drawing, example, only for explaining the present invention, is not intended to limit scope of the present invention.
In the present embodiment, the copper sheet used is selected but is not limited to the copper sheet that thickness is 0.07mm.Long limit in the present invention and broadside refer to the limit that length is corresponding and limit corresponding to width respectively, and the length on long limit is necessarily large than the width of broadside.
With reference to Fig. 1, Fig. 2, two band antennas of the present invention comprise medium substrate 1, medium substrate 1 is as substrate, be provided with radiating element 2, metal ground 3, bend microstrip-fed line 4 and sub-miniature A connector 5, radiating element 2 is attached to the one side of medium substrate 2, metal ground 3 is attached to the another side of medium substrate 2, and radiating element 1 and medium substrate 2 overlap without projecting in the horizontal plane, bend microstrip-fed line 4 to be attached on two faces of medium substrate 2 with metal ground 3 symmetries, and bend microstrip-fed line 4 radiating element 2 is connected with sub-miniature A connector 5;
When two band antennas are used for Received signal strength:
Radiating element 2, for responding to and the signal of transmitted tag in received RF recognition system and energy, and passes to the microstrip-fed line 4 of bending;
Bend microstrip-fed line 4, for receiver radiation unit 2 send signal and energy and with metal ground 3 be coupled after be sent to sub-miniature A connector 5;
Sub-miniature A connector 5, for processing the bending signal that sends of microstrip-fed line 4 and the energy transferring radio circuit to read write line;
When two band antennas are used for transmitting:
Sub-miniature A connector 5, is sent to the microstrip-fed line 4 of bending for the signal of the radio circuit process by read write line and energy;
Bend microstrip-fed line 4, for receive sub-miniature A connector 5 launch signal and energy and with metal ground 3 be coupled after send to radiating element 2;
Radiating element 2, for receiving signal and energy that the microstrip-fed line 4 of bending sends and being radiated to space.
Described medium substrate 2 is as the media stage of whole two band antennas, and for adopting the cuboid thin plate of FR4 material, relative dielectric constant is 4.4, and loss tangent is 0.02, and it is long is 40.00mm, and wide is 37.50mm, thickness h
2for 1.60mm.
The microstrip-fed line 4 of described bending, as feed line, for successively bending the copper sheet of twice, being attached on the right side of medium substrate 2 upper surface, being connected to form successively by microstrip line 41, first broken line portion 42 and the second broken line portion 43; Wherein, microstrip line 41 is rectangle copper sheet, it is long is 22.00mm, wide is 3.00mm, microstrip line 41 is connected with the second radiator unit a221 is vertical, and microstrip line 41 with and the first broken line portion 42 form " ┓ " shape, described second broken line portion 43 and not conllinear parallel with described first broken line portion 42, a wherein long limit in described second broken line portion 43 flushes with the broadside of described medium substrate 2.
Microstrip line 41 is the rectangular shape adopting copper product to make, the long 22.00mm of described microstrip line 41, wide 3.00mm;
Described first broken line portion 42 is the rectangular shape adopting copper product to make, the described first long 19.00mm in broken line portion 42, wide 3.00mm, and the broadside conllinear of wherein a long limit and medium substrate 1 upper surface of described broken line 42;
Described second broken line portion 43 is the rectangular shape adopting copper product to make, the described second long 7.00mm in broken line portion 43, wide 3.00mm, and a wherein broadside in described second broken line portion 43 and described medium substrate 1 long limit conllinear and be less than the length of described medium substrate 1;
The long limit length of overlapped part in described first broken line portion 42 and the second broken line portion 43 is 3mm.
Described radiating element 2 comprises described first radiating element (21), the second radiating element (22) and described connecting portion 23, described first radiating element 21, second radiating element 22 and described connecting portion 23 all adopt copper product and are attached to the opposite side of described medium substrate 1 upper surface, and vertical connection does not intersect successively.
Described first radiating element 21 is rectangular shape, one of them long limit of described first radiating element 21 is with the broadside conllinear of described medium substrate 1 and length is equal, and two broadsides of described first radiating element 21 are respectively with two long limit conllinear of described medium substrate 1 and width is less than the length of medium substrate;
Described connecting portion 23 is rectangle, and one end of described connecting portion 23 is connected with one end of described first radiating element 21, and described first radiating element 21 forms " L " shape with connecting portion 23;
Described second radiating element 22 comprises the second radiator unit a221 connected vertically and the second radiator unit b222, described second radiator unit a221 is vertical with described connecting portion 23 connects to form " ┘ " shape, second radiator unit b222 is positioned at and is less than described second radiator unit b222 1/2nd length place, is greater than the second radiator unit b222 part of the second radiator unit b222 1/2nd length towards the first radiating element 21.
The long 40.00mm of described first radiating element 21, wide 4.50mm; The long 4.50mm of described connecting portion 23, wide 1.00mm.
Described metal ground 3, as Horizon panel, is rectangle copper sheet, is attached on the right side of medium substrate 1 lower surface, its long W
3for 40.00mm, wide L
3for 19.00mm, the long limit of 3, metal ground overlaps with the broadside of medium substrate 1 and the length on metal ground 3 is equal with the width of medium substrate 1.
Described sub-miniature A connector 1 performs the single-ended joint of radio of MIT-C-39012 standard as adopting, become with screwed single-termination head group by the inner wire of transmission electric feed signal, the screen lead-out wire of shielding interference.Wherein, inner wire is connected with the lower sideline in the second broken line portion 43, and screen lead-out wire is connected with the lower sideline on metal ground 3, and screwed single-ended joint is connected with the radio circuit of read write line.
Inventive antenna adopts the multifrequency design principle of additional resonance branch, is the radiation of side seam equivalent magnetic current unit.Wherein, the low-frequency range 2.45GHz in the corresponding two-band of the first radiating element 11; High band 5.8GHz in the corresponding two-band of second radiating element 12.In work, radiation or induction 2.45GHz electromagnetic signal time, the first radiating element 11 plays a major role, and the second radiating element 12 almost on this frequency range without impact; Radiation or induction 5.8GHz time, the second radiating element 12 plays a major role, and the first radiating element 11 almost on this frequency range without impact.Before there are no the similar antenna of above-mentioned design.
As shown in Figure 3, a kind of signal acceptance method of two band antennas for microwave radio identification read write line, comprises the following steps:
Radiating element 2 is responded to and the signal of transmitted tag and energy in received RF recognition system, and passes to and bend microstrip-fed line 4;
Bend microstrip-fed line 4 receiver radiation unit 2 send signal and energy and with metal ground 3 be coupled after be sent to sub-miniature A connector 5;
The bending signal that sends of microstrip-fed line 4 and the energy transferring radio circuit to read write line processes by sub-miniature A connector 5.
As shown in Figure 4, a kind of signal transmitting method of two band antennas for microwave radio identification read write line, comprises the following steps:
The signal of the radio circuit process of read write line and energy are sent to the microstrip-fed line 4 of bending by sub-miniature A connector 5;
Bend microstrip-fed line 4 receive sub-miniature A connector 5 launch signal and energy and with metal ground 3 be coupled after send to radiating element 2;
Radiating element 2 receives signal and energy that the microstrip-fed line 4 of bending sends and is radiated to space.
Below by experiment, effect of the present invention is described:
Software emulation and actual measurement, use HFSS simulation software and survey tool to emulate and actual measurement the present invention two band antenna respectively, as shown in Figure 5, Figure 6, wherein Fig. 5 is return loss plot to result, and Fig. 6 is peak gain curve.
Full curve in Fig. 5 represents use HFSS software emulation result, and "○" curve represents actual measured results.Found by Fig. 5, software emulation and actual measured results basically identical, according to actual measured results, return loss is less than the region of-10dB, the frequency range of the work of getting final product is 2GHz-2.82GHz and 5.6GHz-6.1GHz, its bandwidth is respectively 820MHz and 500MHz, covers 2.4-2.8GHz and the 5.725-5.875GHz frequency range that microwave radio identification uses completely.Therefore inventive antenna has the characteristic of two frequency ranges as reading and writing device antenna.
Full curve in Fig. 6 represents use HFSS software emulation result, and " 〃 " curve represents actual measured results.Found by Fig. 6, software emulation and actual measured results basically identical, according to actual measured results, under 2.45GHz frequency, peak gain is 4.38dBi, and under 5.8GHz frequency, peak gain is 8.27dBi.Therefore inventive antenna all has higher gain as reading and writing device antenna in above-mentioned two frequency ranges.
The foregoing is only preferred embodiment of the present invention, not in order to limit the present invention, within the spirit and principles in the present invention all, any amendment done, equivalent replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (10)
1. two band antennas for microwave radio identification read write line, it is characterized in that, comprise medium substrate (1), described medium substrate (1) is as substrate, also comprise radiating element (2), metal ground (3), bend microstrip-fed line (4) and sub-miniature A connector (5), described radiating element (2) and the microstrip-fed line of bending (4) are all attached to the upper surface of described medium substrate (2), described metal ground (3) is attached to the lower surface of medium substrate (2), for the signal that receives with the microstrip-fed line of described bending (4) and Energy Coupling, described radiating element (1) overlaps without projecting in the horizontal plane with described medium substrate (2), and described radiating element (2) is connected with described sub-miniature A connector (5) by the microstrip-fed line of described bending (4),
When described two band antennas are used for Received signal strength:
Described radiating element (2), for responding to and the signal of transmitted tag in received RF recognition system and energy, and passes to the microstrip-fed line of bending (4);
The microstrip-fed line of described bending (4), the signal sent for receiver radiation unit (2) and energy and with metal (3) be coupled after be sent to sub-miniature A connector (5);
Described sub-miniature A connector (5), for processing bending signal that microstrip-fed line (4) sends and the energy transferring radio circuit to described read write line;
When described two band antennas are used for transmitting:
Described sub-miniature A connector (5), is sent to the microstrip-fed line of bending (4) for the signal of the radio circuit process by described read write line and energy;
The microstrip-fed line of described bending (4), for receive signal and energy that sub-miniature A connector (5) launches and with metal (3) be coupled after send to radiating element (2);
Described radiating element (2), for receiving bending microstrip-fed line (4) signal that sends and energy and being radiated to space.
2. a kind of two band antennas for microwave radio identification read write line according to claim 1, it is characterized in that, the microstrip-fed line of described bending (4) is attached to the side of described medium substrate (2) upper surface, connected to form successively by microstrip line (41), the first broken line portion (42) and the second broken line portion (43), described microstrip line (41) is connected with radiating element (2), and described second broken line portion (43) is connected with sub-miniature A connector (5).
3. a kind of two band antennas for microwave radio identification read write line according to claim 2, it is characterized in that, described microstrip line (41) and the first broken line portion (42) composition " ┓ " shape, described second broken line portion (43) and not conllinear parallel with described first broken line portion (42), a wherein long limit in described second broken line portion (43) flushes with the broadside of described medium substrate (2).
4. a kind of two band antennas for microwave radio identification read write line according to claim 3, it is characterized in that, described microstrip line (41) is the rectangular shape adopting copper product to make, described microstrip line (41) long 22.00mm, wide 3.00mm;
Described first broken line portion (42) is the rectangular shape adopting copper product to make, described first broken line portion (42) long 19.00mm, wide 3.00mm, and the broadside conllinear of wherein a long limit and medium substrate (1) upper surface of described broken line (42);
Described second broken line portion (43) is the rectangular shape adopting copper product to make, described second broken line portion (43) long 7.00mm, wide 3.00mm, and a wherein broadside in described second broken line portion (43) and described medium substrate (1) long limit conllinear and be less than the length of described medium substrate (1);
The long limit length of overlapped part in described first broken line portion (42) and the second broken line portion (43) is 3mm.
5. a kind of two band antennas for radio-frequency identification reader/writer according to claim 1, it is characterized in that, described radiating element (2) comprises described first radiating element (21), the second radiating element (22) and described connecting portion (23), described first radiating element (21), the second radiating element (22) and described connecting portion (23) all adopt copper product and are attached to the opposite side of described medium substrate (1) upper surface, and vertical connection does not intersect successively.
6. a kind of two band antennas for radio-frequency identification reader/writer according to claim 5, it is characterized in that, described first radiating element (21) is rectangular shape, one of them long limit of described first radiating element (21) is with the broadside conllinear of described medium substrate (1) and length is equal, and two broadsides of described first radiating element (21) are respectively with two long limit conllinear of described medium substrate (1) and width is less than the length of medium substrate;
Described connecting portion (23) is rectangle, one end of described connecting portion (23) is connected with one end of described first radiating element (21), and described first radiating element (21) and connecting portion (23) form " L " shape;
Described second radiating element (22) comprises the second radiator unit a (221) connected vertically and the second radiator unit b (222), described second radiator unit a (221) is vertical with described connecting portion (23) connects to form " ┘ " shape, second radiator unit b (222) is positioned at and is less than described second radiator unit b (222) 1/2nd length place, is greater than the second radiator unit b (222) part of the second radiator unit b (222) 1/2nd length towards the first radiating element (21).
7. a kind of two band antennas for microwave radio identification read write line according to claim 5, is characterized in that, the long 40.00mm of described first radiating element (21), wide 4.50mm; Described connecting portion (23) long 4.50mm, wide 1.00mm.
8. two band antennas for microwave radio identification read write line according to claim 1, it is characterized in that, described medium substrate (1) is adopt material to be the cuboid thin plate of FR4, described medium substrate (1) long 40.00mm, wide 37.50mm.
9. a kind of two band antennas for microwave radio identification read write line according to claim 8, it is characterized in that, described metal ground (3) is the rectangular shape be made up of copper product, described metal ground (3) long 40.00mm, wide 19.00mm, and the long limit of described metal ground (3) flushes with the corresponding sideline of described medium substrate (2);
Described sub-miniature A connector (5) comprises the inner wire of signal transmission, the screen lead-out wire of shielding interference and screwed single-ended joint; This screen lead-out wire is connected with metal ground (3); This inner wire is connected with the second broken line portion (43); This screwed single-ended joint is connected with the radio circuit of read write line.
10. one kind for the signal transmitting and receiving method of two band antennas of microwave radio identification read write line, it is characterized in that, comprises the following steps:
When for Received signal strength, comprise the following steps:
The signal of transmitted tag and energy in radiating element (2) induction and received RF recognition system, and pass to and bend microstrip-fed line (4);
Bend signal and energy that microstrip-fed line (4) receiver radiation unit (2) sends and with metal (3) be coupled after be sent to sub-miniature A connector (5);
Sub-miniature A connector (5) processes bending signal that microstrip-fed line (4) sends and the energy transferring radio circuit to described read write line;
When for transmitting, comprise the following steps:
The signal of the radio circuit process of described read write line and energy are sent to the microstrip-fed line of bending (4) by sub-miniature A connector (5);
Bend microstrip-fed line (4) receive sub-miniature A connector (5) signal launched and energy and with metal (3) be coupled after send to radiating element (2);
Radiating element (2) receives bending microstrip-fed line (4) signal that sends and energy and is radiated to space.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201510623338.7A CN105375099A (en) | 2015-09-25 | 2015-09-25 | A two-frequency band antenna and a signal transmitting and receiving method of the antenna |
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| CN201510623338.7A CN105375099A (en) | 2015-09-25 | 2015-09-25 | A two-frequency band antenna and a signal transmitting and receiving method of the antenna |
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| CN105375099A true CN105375099A (en) | 2016-03-02 |
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| CN201510623338.7A Pending CN105375099A (en) | 2015-09-25 | 2015-09-25 | A two-frequency band antenna and a signal transmitting and receiving method of the antenna |
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| CN106785352A (en) * | 2016-12-30 | 2017-05-31 | 歌尔科技有限公司 | A kind of antenna for mobile phone and its mobile phone |
| CN108336485A (en) * | 2018-03-28 | 2018-07-27 | 汽-大众汽车有限公司 | A kind of ultra-wideband coplanar antenna |
| WO2024002040A1 (en) * | 2022-06-30 | 2024-01-04 | 青岛理工大学 | Wireless microstrip patch antenna sensor and application thereof in field of debonding defect detection |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106785352A (en) * | 2016-12-30 | 2017-05-31 | 歌尔科技有限公司 | A kind of antenna for mobile phone and its mobile phone |
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| CN108336485A (en) * | 2018-03-28 | 2018-07-27 | 汽-大众汽车有限公司 | A kind of ultra-wideband coplanar antenna |
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| WO2024002040A1 (en) * | 2022-06-30 | 2024-01-04 | 青岛理工大学 | Wireless microstrip patch antenna sensor and application thereof in field of debonding defect detection |
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