engleski

Toward Self-oscillating Non-Foster Unit Cell for Future Active Metasurfaces

The concept of a self-oscillating non-Foster unit cell, intended for use in future active metasurfaces, is introduced. It is based on two orthogonally polarized small antennas, connected via negative impedance converter (NIC). A NIC converts the admittance of the first antenna into a negative admittance, cancelling the admittance of the second antenna within a theoretically infinite bandwidth.

active metasurface, active antenna, oscillator, non-Foster, negative impedance converter, stability, matching

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