METHOD FOR EXCITING FERROELECTRIC ANTENNA AND MECHANICAL DESIGN OF THE LATTER Russian patent published in 2005 - IPC

FIELD: electromagnetic-radiation radio-receiving and radio-transmitting devices including high-gain broadband receiving and transmitting antennas.

SUBSTANCE: proposed ferroelectric antenna has cylindrical ferroelectric ceramic body, control grid electrodes mounted on end surfaces of cylindrical body, and external dc voltage supply; cylindrical body of antenna is made of alternating ferroelectric ceramic and ferrite-insulator plates; flat ends of each ferroelectric ceramic dipole are covered with control electrode layer; all stacked dipoles are interconnected by control electrodes; core is made of metal wire turn fixed in central hole of dipole stack and connected at its ends to transceiving device; external dc voltage supply is connected to dipoles or to control electrodes; during reception antenna is excited by inducing surface polarization charges in each dipole in ferroelectric phase by external electromagnetic field of laminated stack, and same charges are used to produce high-frequency secondary electromagnetic field that functions to induce high-frequency currents in core made in the form of metal turn thereby enhancing gain of receiving signal in proportion to number of dipoles in laminated stack, dipole surface area, dielectric constant of ferroelectric ceramic, magnetic permeability of ferrite-insulator plates, inductance of ferroelectric ceramic dipole stack, wave impedance of stack, core turn number, and core inductance; radio signal transmission power is enhanced by exciting antenna with high-frequency currents flowing in metal turn thereby producing high-frequency electric fields of dipole polarization surface charges in ferroelectric phase and radiating them in space to produce secondary electromagnetic field whose strength is also proportional to dipole number in laminated stack, dipole surface area, dielectric constant of ferroelectric ceramic, magnetic permeability of ferrite-insulator plates, inductance of ferroelectric dipole stack, wave impedance of stack, core turn number, and core inductance.

EFFECT: enhanced gain in radio signal reception and transmission; enlarged radio-signal frequency recording range.

6 cl, 5 dwg