Multiple-frequency-band antenna device for near field communication and application system thereof
A multi-band antenna and short-distance technology, which is applied in the near-field transmission system, enables the antenna to work in different bands of devices and antennas at the same time, can solve the problems of increasing the area and volume of POS machines, and achieve volume and area reduction, The operation is convenient and convenient, and the effect of swiping the card is maintained
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Embodiment 1
[0056] Embodiment 1: as figure 2 As shown, a stacked structure is adopted, the 13.56MHz antenna module 1130 is on the top layer, the low-frequency magnetic coupling coil 1110 is directly below it, and the 2.4GHz radio frequency antenna module 1120 is located in the middle of the shape surrounded by the low-frequency magnetic coupling coil 1110, in order to shield the low-frequency magnetic induction coil For the interference of 1110 on 13.56MHz antenna module 1130, a certain distance between 13.56M antenna module 1130 and low-frequency magnetic induction coil 1110, 1mm to 10mm is feasible, so as to realize the closed loop of 13.56MHz magnetic field lines and the outward radiation of energy.
Embodiment 2
[0057] Embodiment 2: as image 3 As shown, the difference between this embodiment and Embodiment 1 is that an anti-jamming device 1140 is provided between the 13.56 MHz antenna module 1130 and the low-frequency magnetic coupling coil 1110, and the anti-jamming device 1140 uses a wave-absorbing material in the 13.56 MHz frequency band Or it is made of magnetically permeable material that acts as a magnetic conductor for the 13.56MHz magnetic field, such as ferrite, so as to realize the closed loop of the 13.56MHz magnetic force line and the outward radiation of energy.
Embodiment 3
[0058] Embodiment 3: as Figure 4 As shown, the difference between this embodiment and Embodiment 1 and Embodiment 2 is that a tiled structure is adopted, the 13.56MHz antenna module 1130 is on the outermost layer, the low-frequency magnetic coupling coil 1110, the 13.56M antenna module 1130 and the 2.4GHz radio frequency antenna module 1120 are on the same plane, and the low-frequency magnetic coupling coil 1110 is separated from the 13.56MHz antenna module 1130 by a certain distance. Most of the magnetic field radiated by 1130 passes through the gap, and the radiation energy blocked by the low-frequency magnetic coupling coil 1110 is quite small, so that the energy of the 13.56MHz antenna module 1130 can radiate out without a blind area.
[0059] The 13.56MHz antenna module 1130 and the low-frequency magnetic coupling coil 1110 may not be on the same plane, but the 13.56MHz antenna module 1130 is located at a position not shielded by the low-frequency magnetic coupling coil ...
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