Called mCOMET, this tunable metal ring antenna configuration is for use in smart phones using RF chips with a two pole double throw (2PDT) antenna switch and metal ring feature.
The antenna configuration houses the antennas in a metal chassis with a dielectric antenna carrier and antenna volume of 10x74x5mm3, including USB, and with a minimum ground clearance on the printed circuit board of two times 30x8mm for the two antennas together. The primary and secondary antennas are located at the bottom end and on the side of the device, increasing the number of operating bands at the same end of the device. No additional space is needed for antennas, enabling more freedom of design.
Frequency bands for both antennas are a low band of 698-960 MHz and high bands of 1710-2170 MHz and 2500-2690 MHz. The low band envelope correlation coefficient (ECC) is below 0.5. This high performing antenna has a minimized hand-effect so if the user's hand is covering one antenna, transmission is switched to the other antenna (2PDT switch). There are equal transmission line lengths from engine to antenna so equal losses from the line. As it's a modular system, there are numerous integration possibilities.
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