A kind of double sided board difference coil-type antennaTechnical field
The present invention relates to NFC antenna design field, be specifically related to a kind of double sided board difference coil-type antenna.
Background technology
The English full name NearFieldCommunication of NFC, near field wireless telecommunications.It is initiated by PHILIPS Co., combined the wireless technology promoted mainly by the well-known manufacturer such as Nokia, Sony.Coordinated by many companies, university and user and set up Pan European Union, be intended to develop the open architecture of NFC, and promote its application in mobile phone.NFC is developed by non-contact radio-frequency (RFID) technology and the Technology Integration that interconnects, integrated induction formula card reader, induction type card and point-to-point function on single chips, can carry out identifying and exchanges data with various compatible equipment in short-range.This technology is the simple merging of RFID technique and data acquisition technology at first, and developed at present and become a kind of short-distance wireless communication technology, growth momentum is quite rapid.
The NFC antenna cabling form of current main flow is single-ended double sided board, and by the form of its cabling is changed over double sided board difference type antenna, but single-ended Double-panel antenna antijamming capability is weak, needs circuit to transform, and effectively cannot suppress Electromagnetic Interference.Therefore, the difference Double-panel antenna proposing a kind of applicable circuit symmetrical is necessary.
Summary of the invention
Object of the present invention be exactly in order to overcome above-mentioned prior art exist defect and provide a kind of coincident circuit symmetric design antenna and can anti-electromagnetic wave interference double sided board difference coil-type antenna.
Object of the present invention can be achieved through the following technical solutions: comprise copper wires, and this copper wires, at the two sides cabling of PCB or FPC plate, forms the intersection of at least one physical topology type.
Image current is formed after described double sided board difference coil-type antenna energising.
The infall of described copper wires, through PCB or FPC plate, forms double sided board, and namely at the coil that PCB or FPC plate two sides has copper wires to be formed, and after energising, the coil on plate two sides take crosspoint as symmetrical centre, forms Mirror Symmetry.
The crosspoint that described physical topology type intersects at one with in physical topology type mutually level or vertical line.
The coil Mirror Symmetry of the both sides, crosspoint that multiple physical topology type intersects.
Described coil forms rectangle, square or circular in logic.
Described double sided board difference coil-type antenna also comprises colloid, and each coil is connected by colloid with PCB or FPC plate junction, and avoids short circuit.
Adopt difference Double-panel antenna of the present invention, under can be applicable to metal environment and nonmetal environment, have good Anti-amyloid-β antibody effect at 13.56MHz.
Compared with prior art, beneficial effect of the present invention is embodied in following several respects:
(1) cabling of copper wires of the present invention is in rectangle, square or circular in logic, good looking appearance.
(2) cabling of copper wires of the present invention is chi structure, does not need circuit is changed, and the design of symmetry effectively can reduce the impact of electromagnetic interference, effectively improves the radio-frequency performance of antenna.
Accompanying drawing explanation
Fig. 1 is double sided board difference type antenna structure view of the present invention,
Fig. 2 is the current trend schematic diagram of double sided board difference type antenna of the present invention.
Wherein 1 is antenna lead-in, and 2 is node two, and 3 is node three, and 4 is node four, and 5 is node five, and 6 is node six, and 7 is node seven, and 8 is antenna output end.
Embodiment
Elaborate to embodiments of the invention below, the present embodiment is implemented under premised on technical solution of the present invention, give detailed execution mode and concrete operating process, but protection scope of the present invention is not limited to following embodiment.
Embodiment 1
A kind of four circle double sided board difference coil-type antenna, comprise copper wires, as shown in Figure 1, copper wires forms square in logic, comprise antenna lead-in 1, and the node 22 connected successively thereafter, node 33, node 44, node 55, node 66, node 77, and antenna output end 8, copper wires, at the two sides cabling of PCB or FPC plate, forms the intersection of three physical topology types:
Copper wires between antenna lead-in 1 and node 22 is coil one, be positioned at pcb board front, the copper wires between node 22 and node 33 is coil two, is positioned at the back side of pcb board, avoid copper wires short circuit, coil one and coil two form the first chi structure;
Copper wires between node 33 and node 4 is coil three, is positioned at pcb board front, and the copper wires between node 44 and node 55 is coil three, is positioned at the back side of pcb board, avoids copper wires short circuit, forms the second chi structure between coil three and coil one;
Copper wires between node 55 and node 66 is coil four, be positioned at pcb board front, the copper wires between node 66 and node 77 is coil five, is positioned at the back side of pcb board, avoid copper wires short circuit, coil five becomes the 3rd chi structure with coil one linear;
As shown in Figure 1, point-blank, with each crosspoint for symmetrical centre, the cabling of its both sides copper wires is Mirror Symmetry, and is provided with colloid in copper wires and pcb board contact position, avoids short circuit in the crosspoint of three chi structures.
As shown in Figure 2, for the current trend (arrow represents current trend) of above-mentioned double sided board difference coil-type antenna, electric current is entered by antenna lead-in 1, approach node 22, node 33,44, node 55,66, node 77, finally walked out by antenna output end 8.
Adopt the difference Double-panel antenna of above invention, under can be applicable to metal environment and nonmetal environment, have good Anti-amyloid-β antibody effect at 13.56MHz.
Embodiment 2
Double sided board difference coil-type antenna, comprises copper wires and colloid, and copper wires, at the two sides cabling of FPC plate, forms the intersection of a few physical topology type.And adopting colloid to be connected in copper wires with FPC plate contact position, all the other are with embodiment 1.
The present invention can in different forms, the realization such as specification, in these accompanying drawings, for clearly visible, may increase or reduce the number of turns, also can zoom in or out relative size.
Obviously, those skilled in the art can carry out various change and distortion to the present invention and not depart from the spirit and scope of the present invention.If these amendments of the present invention like this and distortion belong in the scope of claim of the present invention and equivalent technologies thereof, then the present invention is also intended to forgive these changes interior.