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Disclosed is the method to design the antenna cover that highly reduces the variation in Voltage Standing Wave Ratio (VSWR. Hereafter referred to as VSWR) at mass production.
English (United States)
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Page 1 of 4
New antenna cover design to get a steady performance
Problems of the present antenna:
- Since the VSWR of the antenna was instable, sometimes it caused failure at the outgoing inspection.
- The distance between the resonance part of the antenna and the dielectric materials around the antenna was unstable after assembly since those components were independent. - Since the resonance part of the antenna and the dielectric materials around the antenna were independent components, there had been the risk of deforming the resonance part of the antenna at assembling, handling, and transporting.
Due to the various reasons written as above, the distance between the resonance part of the antenna and the dielectric materials around the antenna, and the positional relationship between them used to be unstable. As the result, the antenna built on mass production had unstable VSWR, and those were causing the instability of the gain characteristics of the antenna.
- By integrating the antenna body and the dielectric Acrylonitrile-butadiene-styrene (ABS) resin into one component, the distance between the antenna and the LCD rear cover was made stable. - Improved conformation by surrounding the resonance part of the antenna with the ABS resin reduced the displacement of VSWR at the LCD assembly line. (Fig.1) - The new conformation described above also reduced the risk of deforming the resonance part of the antenna at assembling, handling, and transporting.
Page 2 of 4
The resonance part of the antenna is surrounded by the ABS resin. They are fixed with the hot-melt welding. (Fig.2)
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