CN205282636U - Hyperfrequency RFID antenna and electron car logo reading and writing equipment - Google Patents

Abstract

The utility model provides a hyperfrequency RFID antenna and electron car logo reading and writing equipment, including the casing with set up in antenna body in the casing, its characterized in that, the antenna body is by bottom plate, two radiating element, feed network and radio frequency joint, wherein the bottom plate is the rectangle metal sheet, two radiating element lays along the length direction interval of bottom plate on the bottom plate, and every radiating element all with bottom plate parallel arrangement, feed network connects two radiating element with the radio frequency connects. Adopt the utility model discloses an antenna, rationally distributed compactness, simple structure, therefore easily production and installation, and light in weight, the gain is big.

Description

A kind of ultrahigh frequency RFID antenna and electronics car mark read-write equipment

Technical field

The utility model belongs to thing networking field, is specifically related to a kind of ultrahigh frequency RFID antenna and electronics car mark read-write equipment.

Background technology

One of core technology that RFID technique is networked as thing, is just being widely used among our daily life. The system of general RFID is by read write line, antenna and label composition. And antenna is as the bridge of read write line and label communication, play most important effect. In rfid system, the performance quality of whole system, as realizing the equipment that radiofrequency signal space is propagated and resume radio communication is connected between RFID label tag with read write line, is served very important effect by antenna. And the design of existing RFID antenna is how comparatively complicated, weight is higher, installs for production and all causes inconvenience. Therefore designing structure simple, size is little, and the RFID antenna that gain is big has important practical significance.

Practical novel content

In view of this, the utility model embodiment provides a kind of structure simple, and size is little, the ultrahigh frequency RFID antenna that gain is big.

A kind of ultrahigh frequency RFID antenna, the antenna body comprising housing and be arranged in described housing, described antenna body is made up of base plate, two radiating elements, feed network and radio-frequency joint, wherein said base plate is rectangular metal plate, two described radiating elements are laid on described base plate along the length direction interval of base plate, and all parallel with the described base plate setting of each radiating element, described feed network connects two described radiating elements and described radio-frequency joint.

Preferably, described base plate two long limits are upwards bent to substantially vertical formation side, and two described radiating elements and feed network settings are in the upper surface of described base plate.

Preferably, short limit, the side of described base plate outwards extends and is upwards bent to substantially vertical formation web plate, and described radio-frequency joint is arranged on described web plate.

Preferably, two described radiating element width between centerss are 0.7 to 1.3 operation wavelength.

Preferably, described feed network is made up of coaxial line and power divider, and described power divider is connected with the feed mouth on two described radiating elements by coaxial line respectively, and described power divider is also connected by coaxial line and described radio-frequency joint.

Preferably, described radiating element comprises guiding plate and the radial lamella of parallel setting, and described guiding plate is connected with described radial lamella by pillar stiffener, and described radial lamella is connected with described base plate by pillar stiffener, and described feed mouth is arranged on described radial lamella.

Preferably, described radial lamella is rectangle, the edge of two described radial lamellas is parallel with the edge of described base plate, and described feed mouth is arranged at any approximate midpoint of described radial lamella and close edge, and two described feed mouths position on the radial lamella of place is identical.

Preferably, described base plate and described radiating element are aluminum plate.

Preferably, described housing comprises box body and a sealed sides lid of a single side opening, and described sealed sides covers and is provided with the reserved opening holding described radio-frequency joint.

The utility model additionally provides a kind of electronics car mark read-write equipment on the other hand, comprises RFID antenna as above.

Adopting antenna of the present utility model, rational and compact, structure is simple, is therefore easy to produce and install, and weight is light, and gain is big.

Accompanying drawing explanation

In order to be illustrated more clearly in the utility model embodiment or technical scheme of the prior art, it is briefly described to the accompanying drawing used required in embodiment or description of the prior art below, apparently, accompanying drawing in the following describes is only embodiment of the present utility model, for those of ordinary skill in the art, under the prerequisite not paying creative work, it is also possible to obtain other accompanying drawing according to the accompanying drawing provided.

A kind of ultrahigh frequency RFID antenna stereographic map that Fig. 1 provides for the utility model embodiment;

The structure iron of a kind of antenna body that Fig. 2 provides for the utility model embodiment.

Embodiment

Below in conjunction with the accompanying drawing in the utility model embodiment, the technical scheme in the utility model embodiment is clearly and completely described, it is clear that described embodiment is only the utility model part embodiment, instead of whole embodiments. Based on the embodiment in the utility model, those of ordinary skill in the art are not making other embodiments all obtained under creative work prerequisite, all belong to the scope of the utility model protection.

A kind of ultrahigh frequency RFID antenna as depicted in figs. 1 and 2, the antenna body comprising housing and be arranged in described housing, it is characterized in that, described antenna body is made up of base plate 11, two radiating elements, feed network and radio-frequency joint 14, wherein said base plate 11 is rectangular metal plate, two described radiating elements are laid on described base plate 11 along the length direction interval of base plate 11, and all parallel with described base plate 11 setting of each radiating element, described feed network connects two described radiating elements and described radio-frequency joint 14.

Base plate two long limits are upwards bent to substantially vertical formation side, and two described radiating elements and feed network settings are in the upper surface of described base plate 11. And the short limit, side of described base plate 11 outwards extends and is upwards bent to substantially vertical formation web plate, described radio-frequency joint 14 is arranged on described web plate. Easy to understand, the overbending direction on long limit, the overbending direction on short limit and radiating element, feed network settings direction are identical relative to base plate 11. Further, the length of two long limit bendings is less than the length of short limit bending. Employing is bent to form side when antenna body is placed into housing, it is possible to play the anti-sliding stop of fixing effect, simultaneously, it is also possible to reduce back lobe and the return loss of antenna.

Further, the width between centers of two radiating elements is adjustable, and in an embodiment, two described radiating element width between centerss are 0.7 to 1.3 operation wavelength. Isolation between different width between centers two radiating elements is different, and the gain of whole antenna is also different, when the width between centers of two radiating elements is 1 wavelength, when size limits, it is possible to obtain best effect. Wherein said feed network is made up of coaxial line 132 and power divider 131, described power divider 131 is connected with the feed mouth 123 on two described radiating elements by coaxial line 132 respectively, and described power divider 131 is also connected by coaxial line 132 and described radio-frequency joint 14. Power divider is one piece of pcb board having printed micro-band circuit.

Wherein said radiating element comprises guiding plate 122 and the radial lamella 121 of parallel setting, described guiding plate 122 is connected with described radial lamella 121 by 4 pillar stiffeners 124, described radial lamella 131 is connected with described base plate 11 by pillar stiffener 124, and described feed mouth 123 is arranged on described radial lamella 121. Described radial lamella 121 is rectangle, and the edge of two described radial lamellas 121 is parallel with the edge of described base plate 11. Being appreciated that, described edge is parallel refers to that 4 edges of radial lamella 121 and 4 edges of base plate 11 are distinguished opposing parallel. Described feed mouth 123 is arranged at the approximate midpoint on any one side of described radial lamella 121 and close edge, and two described feed mouths 123 are identical relative to the relative position of place radial lamella 121. Easy to understand, feed mouth 123 effect that produce different from the relative position of place radial lamella 121 is also different, such as two feed mouths 123 are all when the close left side or the right of place radial lamella 121, antenna is horizontal polarization, two feed mouths 123 all in the close top of place radial lamella 121 or below time, antenna is vertical polarization. Relative owing to being up and down, two feed mouths 123 can also be worked as all when the close left side or the right of place radial lamella 121, antenna is vertical polarization, two feed mouths 123 all in the close top of place radial lamella 121 or below time, antenna is horizontal polarization. Described base plate 11 and described radiating element are aluminum plate. That is base plate 11, web plate, side, radial lamella 121 are aluminium system. Adopting antenna of the present utility model, rational and compact, structure is simple, is therefore easy to produce and install, and weight is light, and gain is big.

The housing of ultrahigh frequency RFID antenna comprises box body 21 and a sealed sides lid 22 of a single side opening, and described sealed sides lid 22 is provided with the reserved opening holding described radio-frequency joint 14. Above-mentioned antenna body is put into box body 21, covers sealed sides lid 22 afterwards and described radio-frequency joint 14 is stretched out by reserved opening. The sealing effect adopting this housing can reach good, thoroughly avoids the pollution of rainwater, dust.

The utility model additionally provides a kind of electronics car mark read-write equipment on the other hand, comprise as above RFID antenna described in embodiment, and the mid-frequency of electronics car mark read-write equipment is 900M, special in by being arranged on road surface (such as portalframe, overline bridge) or side, road (vertical rod) ultrahigh frequency RFID antenna as above and electronics car mark carries out wireless transactions.

In this specification sheets, each embodiment adopts the mode gone forward one by one to describe, and what each embodiment emphasis illustrated is the difference with other embodiments, between each embodiment identical similar portion mutually see. For device disclosed in embodiment, owing to it corresponds to the method disclosed in Example, so what describe is fairly simple, relevant part illustrates see method part.

Professional can also recognize further, the unit of each example described in conjunction with embodiment disclosed herein and algorithm steps, can realize with electronic hardware, computer software or the combination of the two, in order to the interchangeableness of hardware and software is clearly described, generally describe composition and the step of each example in the above description according to function. These functions perform with hardware or software mode actually, depend on application-specific and the design constraint of technical scheme. Each specifically can should be used for using different methods to realize described function by professional and technical personnel, but this kind realizes not think and exceeding scope of the present utility model.

The method described in conjunction with embodiment disclosed herein or the step of algorithm can direct hardware, treater execution software module, or the combination of the two implements. Software module can be placed in the storage media of other form any known in random access memory (RAM), internal memory, read-only storage (ROM), electrically programmable ROM, electrically erasable ROM, register, hard disk, moveable magnetic disc, CD-ROM or technical field.

To the above-mentioned explanation of the disclosed embodiments, professional and technical personnel in the field are enable to realize or use the utility model. To be apparent for those skilled in the art to the multiple amendment of these embodiments, General Principle as defined herein when not departing from spirit or scope of the present utility model, can realize in other embodiments. Therefore, the utility model can not be limited in these embodiments shown in this article, but be met the widest scope consistent with principle disclosed herein and features of novelty.

Claims (10)

1. a ultrahigh frequency RFID antenna, the antenna body comprising housing and be arranged in described housing, it is characterized in that, described antenna body is made up of base plate, two radiating elements, feed network and radio-frequency joint, wherein said base plate is rectangular metal plate, two described radiating elements are laid on described base plate along the length direction interval of described base plate, and all parallel with the described base plate setting of each radiating element, and described feed network connects two described radiating elements and described radio-frequency joint.

2. RFID antenna according to claim 1, it is characterised in that, described base plate two long limits are upwards bent to substantially vertical formation side, and two described radiating elements and feed network settings are in the upper surface of described base plate.

3. RFID antenna according to claim 1, it is characterised in that, short limit, the side of described base plate outwards extends and is upwards bent to substantially vertical formation web plate, and described radio-frequency joint is arranged on described web plate.

4. RFID antenna according to the arbitrary item of claim 1-3, it is characterised in that, two described radiating element width between centerss are 0.7 to 1.3 operation wavelength.

5. RFID antenna according to claim 4, it is characterized in that, described feed network is made up of coaxial line and power divider, described power divider is connected with the feed mouth on two described radiating elements by coaxial line respectively, and described power divider is also connected by coaxial line and described radio-frequency joint.

6. RFID antenna according to claim 5, it is characterized in that, described radiating element comprises guiding plate and the radial lamella of parallel setting, described guiding plate is connected with described radial lamella by pillar stiffener, described radial lamella is connected with described base plate by pillar stiffener, and described feed mouth is arranged on described radial lamella.

7. RFID antenna according to claim 6, it is characterized in that, described radial lamella is rectangle, the edge of two described radial lamellas is parallel with the edge of described base plate, described feed mouth is arranged at any on one side approximate midpoint of described radial lamella and near edge, and two described feed mouths position on the radial lamella of place is identical.

8. RFID antenna according to the arbitrary item of claim 5-7, it is characterised in that, described base plate and described radiating element are aluminum plate.

9. RFID antenna according to claim 8, it is characterised in that, described housing comprises box body and a sealed sides lid of a single side opening, and described sealed sides covers and is provided with the reserved opening holding described radio-frequency joint.

10. an electronics car mark read-write equipment, comprises RFID antenna as claimed in any one of claims 1-9 wherein.