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#Announcement(IoTStack) #Skill [ via IoTForIndiaGroup ]
#Organizer : Harald Naumann / Neustadt #City : Germany #IsTraining : Antenna Design
There is no reference for antennas on extremely small boards in small packages. Cellular chip antennas of different manufacturers all have a reference ground plane of approx. 45 mm +/- 10 mm x 100 mm +/- 20 mm. Nobody can cheat the physics. The length of the PCB influences the return loss. This is documented in my IoT / M2M Cookbook. In the Cookbook the same antenna was measured on different PCBs.
With a smaller PCB the effort in antenna development increases. Chip antennas often fail. The minimum size of an antenna was discovered by Lan Jen Chu between 1948 and 1960. His theses were then optimized again, but the basic statement of Chu has not changed. In electrical engineering Chu limit for a small radio antenna. In practice this means that there is a limit to the bandwidth of data that can be sent to and received from small antennas such as are used in mobile phones.PCBs which differ from the size 45 mm +/- 10 mm x 100 mm +/- 20 mm lead to additional effort when integrating the antenna. The same applies to round or curved surfaces. The antenna is not only the component we see but the component (antenna) with the board and the housing. Antennas are also not components but systems.
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