Passive-signal enhancement antenna sheet for iphone full-card NFC scheme
A signal enhancement and antenna technology, which can be used in foldable/retractable loop antennas, radiating element structures, etc., and can solve problems such as difficulty in receiving signal readers
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[0044] In order to make the object, technical solution and advantages of the present invention clearer, the technical solution of the present invention is clearly and completely described below in conjunction with the embodiments and accompanying drawings. Obviously, the described embodiments are part of the embodiments of the present invention, not all of them. the embodiment. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.
[0045] Figure 4 It is the SIM magnetic field analysis diagram of Apple mobile phone. Helical antenna coil 41 on the SIM card, which sends and receives signals of the reader operating frequency; by figure 1 As shown, the card slot 10 of the SIM card is metal, so the leakage magnetic field at the bottom of the SIM card is very small, and the leakage magnetic field at the top of the SIM card, that i...
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