Tunable Front-end Design with a Dual-band Antenna for Small Cellular Devices

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.

Amin H. Yadegar, Chen J., Berg M., Pärssinen A.

A4 Article in conference proceedings

Proceedings of the European Conference on Antennas and Propagation (EUCAP2019), 31 March-5 April 2019, Krakow, Poland

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

https://ieeexplore.ieee.org/abstract/document/8739888 http://urn.fi/urn:nbn:fi-fe2019121949034