[Global Technology Reporter Zhang Zhiying] Apple spooked the iPhone 6 Plus explosion on February 6. When an American woman sleeps, the charging iPhone 6 Plus explodes.
It is understood that Apple has begun to investigate the cause of the accident, but has not yet responded to media reports, this is not the first time Apple has received the iPhone 6 Plus explosion complaints.
According to CBS, the female user is Amanda Bentz and lives in Florida, USA. The woman claimed that she would charge her iPhone at the bedside before bedtime and wake up at 3am, only one step away, and see the phone catch fire. The owner said, "No smoking, or other sounds were produced. Without warning, it suddenly burned itself." "It made me wake up." Her husband immediately extinguished the flames, but fortunately it did not cause a disaster.
The woman's husband, Kyle, posted a few photos of the iPhone after the explosion on Facebook and he had to be careful about where the phone recharged. In particular, “Beside a pillow, charge in another room, charge when not at home†must Special care.
An Apple spokesperson said that the company is investigating the cause of the accident, and for the woman's free replacement of the new iPhone 6 Plus, full refund of credit card payments. The owner stated that he was waiting to receive a new replacement device.
The industry believes that in fact, all lithium batteries have the risk of "thermal runaway", and the market's pursuit of lightness and functionality of mobile phones has forced manufacturers to sacrifice more secure designs.
Apple’s competitor, Samsung, had previously experienced cell phone explosions and recalled its Galaxy Note 7 product. The press conference on the investigation of the recent explosion was attributed to the design and production of lithium batteries. At the end of last year, Apple was caught in an explosion of turmoil and many consumers complained to consumer associations. The rumors that iPhone 7 was just released last year also have problems. However, Apple did not recall the mobile phones, but chose to deal with fire accidents one by one.
With the rapid development of wireless sensing technology, 433 MHz wireless communication devices have been more widely used in portable devices, vehicle-mounted terminals, intelligent locks and other fields [1]. As an important part of wireless communication equipment, antenna is a key component that affects the overall performance of the communication system [2].
Domestic and foreign scholars have been exploring the 433 MHz printed antenna with high gain and miniaturization for many years. However, there are two main trends in the design of 433 MHz printed antenna by previous scholars: one is to sacrifice size to ensure high gain, such as the structural scheme in literature [3]; The other is to sacrifice gain to ensure size miniaturization, such as the scheme in reference [4].
Taking into account the effective size and gain characteristics of the antenna is the difficulty in the design of 433 MHz miniaturized printed antenna. Based on the research experience of domestic and foreign scholars on 433 MHz printed antenna, a 433 MHz miniaturized spiral printed antenna is designed based on the 1/4 wavelength monopole antenna. The simulation results show that the antenna occupies only 20×35 mm2 and the effective gain is -4.14 dB.
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