Wisteq passive label adopts directional antenna
Finland wisteq company, a well-known label manufacturer in the industry, was founded in 2004. Its label products may be tested in the next round, and it is gradually changing from isob standard to Gen2 EPC standard. The latest passive RFID UHF tag launched by wisteq can be reused. It adopts a specially designed UHF antenna, which can stick the tag on metal or liquid packaging, and the signal transmission and reception of the tag will not be affected by metal or liquid
olavi merilainen, CEO of wisteq, said: "RFID tags are affected in the metal or liquid environment, not because of high frequency or UHF, but because of the design of the antenna. Now almost all antennas in the market are bipolar design, and this kind of antenna can not work in the metal or liquid environment.
merilainen said that because the bipolar antenna radiates the same signal in any direction, and the signal close to the metal or liquid in a certain direction The signal will be lost. The solution of wisteq is to generate special signals through the microwave transmission belt antenna and transmit them in one direction, so the loss is less
a metal conductor is combined with an insulating material, and then placed on a metal plate. The micro clamp wave transmission belt antenna is first used on a tag. Although this technology is very mature, the tag made of it is too expensive. Wisteq said that it took them two years to develop a low-cost RFID tag for the microwave transmission belt antenna
through the relevant personnel of their company, we learned that their new antenna and the original bipolar antenna will be more used in the automotive field when they are installed on the RFID chip, and then put into a plastic package
although their design improves the operation in metal or liquid environment, they still need further improvement if they really want to put it into the market. They hope to launch the product this summer. Merilainen said, "the radiation range of the label in the metal or liquid environment is 4m, while the radiation range in the undisturbed environment is 5m." Last October, the company launched a UHF tag named wtug, which uses a bipolar antenna. The radiation range is 2.5m in metal environment and 4m in ordinary environment
in October 2005, wisteq launched the wtug label, which can be fixed on the surface of various items
however, the microwave transmission belt label also has many shortcomings. Because the frequency band supported by this design is very narrow, it can only be used in the United States or Europe alone, not in both regions at the same time. Wisteq first developed a European version, and the American version is later. In addition, This kind of label B. the production cost of all sample breaking labels is also relatively high. When the number of new labels purchased exceeds 100000, the price is about 6.42 cents, twice that of current bipolar labels
merilainen said, "although the price of such labels is higher than that of ordinary labels, their operability is better."
information source: RFID radio frequency Express