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Updated: Oct 20, 2025

Design and Characterization Methodology for Efficient Wide Range Tunable MEMS Filters
Published on: February 4, 2018
Integration of a Novel CMOS-Compatible Magnetoelectric Antenna with a Low-Noise Amplifier and a Tunable Input
Mehdi Nasrollahpour1, Anthony Romano1, Mohsen Zaeimbashi1
1Electrical and Computer Engineering Department, Northeastern University, 360 Huntington Ave., Boston, MA 02115, USA.
Abstract:
A low-noise amplifier (LNA) topology with tunable input matching and noise cancellation is introduced and described in this paper, which was designed and optimized to interface with a magnetoelectric (ME) antenna in a 0.35 µm MEMS-compatible CMOS process. Compared to conventional antennas, acoustically actuated ME antennas have significantly smaller area for ease of integration. The LNA was simulated with an ME antenna model that was constructed based on antenna measurements. Input matching at the LNA-antenna interface is controlled with a circuit that varies the effective impedance of the gate inductor using a control voltage. Tunability of 455 MHz around 2.4 GHz is achieved for the optimum S11 frequency with a control voltage range of 0.3 V to 1.2 V. The proposed LNA has a noise cancelling feedback loop that improves the noise figure by 4.1 dB. The post-layout simulation results of the LNA show a 1-dB compression point of -7.4 dBm with an S21 of 17.8 dB.
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