Antenna-tuning ICs boost antenna efficiency in 4G bands

June 11, 2014 // By EDN
A series of antenna aperture tuning switch ICs from Infineon optimise antenna characteristics to allow for highest data rate operation in LTE bands, while enabling further reduction of current consumption. The BGA1xGN10 ICs are provided in the smallest packages currently available.

The antenna tuning devices, based on Infineon's RF CMOS switch technology, allow the development reduced size and broader frequency range antennae. Features enable improved impedance matching for a single antenna across a wide frequency range, and therefore reduce power stress on the transmitter side and increase sensitivity on the receiver side. They are designed for high ruggedness, low parasitics and highest linearity in order to withstand critical mismatch conditions at the antenna. The new tuning ICs are key to optimise antenna efficiency in relevant LTE bands. Improved antenna efficiency directly translates into better signal quality and fastest data transmission. All devices offer generic GPIO interfaces for smooth antenna control and system integration.

The new antenna aperture tuning solutions are derived from the same high performance 130nm RF CMOS process from Infineon that is being deployed by the RF frontend switches, and benefit from its high volume production scale. There are three switch configurations: BGSA12GN10 SPDT; BGSA13GN10 SP3T; and BGSA14GN10 SP4T, all in a plastic package with dimensions of 1.5 x 1.1 mm which is 60% smaller than CSP type devices on the market.