Tunable front-end design with a dual-band antenna for small cellular devices
Amin, H. Yadegar; Chen, J.; Berg, M.; Pärssinen, A. (2019-06-20)
H. Y. Amin, J. Chen, M. Berg and A. Pärssinen, "Tunable Front-end Design with a Dual-band Antenna for Small Cellular Devices," 2019 13th European Conference on Antennas and Propagation (EuCAP), Krakow, Poland, 2019, pp. 1-5
© 2019 EurAAP/EuCAP. Published in this repository with the kind permission of the copyright owner.
https://rightsstatements.org/vocab/InC/1.0/
https://urn.fi/URN:NBN:fi-fe2019121949034
Tiivistelmä
Abstract
Strict power and form factor requirements of miniaturized IoT wearable devices have introduced severe challenges in equipping them with multi-band cellular IoT connectivity. The antenna front-end renders the primary obstacle since supporting narrow and multi-band cellular connectivity requires a range with extensive coverage and high selectivity. This fact, in turn, would require a larger antenna and multiband filtering. Recently, high-Q tunable antennas have shown great potential in eliminating multiband filtering. However, their coverage and tuning range in small dimensions has proved to be inadequate to present a global coverage. This paper proposes a novel tunable antenna front-end architecture to address this problem. The proposed architecture benefits a dual-band, high-Q and tunable antenna in conjunction with tunable filters to cover a large variety of LTE-M bands in the resolution of 700 MHz to 2155 MHz including bands: 3, 4, 12, 13, 17 and 20. The design and implementation are discussed in detail, and related measurements are presented to prove the tuning capability.
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