| 摘要 |
<p>A multilayer tunable ferroelectric antenna assembly that includes two superimposed substrate layers. A first substrate layer (10) consists of low dielectric material carrying on one face an electrically conductive patch serving as an active feeder-resonator (20). A second substrate (30) includes a ferroelectric material having one face positioned on top of the feeder-resonator (20) and carrying on the opposite face an electrically conductive patch acting as a director (40). The upper director patch is fed through capacitive coupling of energy from the feeder-resonator (20). Application of bias voltage between the director (40) and the feeder-resonator (20) changes the permittivity of the ferroelectric substrate, thereby causing a shift in resonance frequency. A radiation null, corresponding to energy absorption, could be tuned into the resonance frequency at which the antenna is previously exhibiting a radiation characteristic. This provides the antenna a means to behave either as a radiator or an absorber at particular frequency.</p> |
