Radio antennas
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Accused Products
Abstract
A radio transmitting or receiving antenna which is physically compact being typically no more than (3) percent of a wavelength in any dimension. The antenna comprises two electrical conducting surfaces (2) and (4) across which radio frequency electric field lines carrying half the power are arranged to cross radio frequency magnetic field lines carrying the remaining half power to thereby synthesise and propagate radio waves. The low impedance coaxial feeder (1) from the transmitter flows through a set of coils (3A) to (3D) wired in parallel and lying in a toroidal shape to create a circular RF magnetic field H and then enters a low impedance tap on a resonant autotransformer used to connect a high RF voltage and create a curving electric field E across the interaction zone in the volume between the upper metal cylinder (4) and the ground plane (1).
100 Citations
31 Claims
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- 16. A radio antenna which is physically dimensioned to be less than ten percent of the intended operating wavelength, and in which the power to be transmitted is connected from a low impedance feeder via an inductive component, or a parallel set of inductive components, connected to a low impedance tap on a radio-frequency autotransformer which has a capacitive component connected to be parallel resonance, the first inductive component or components being used to stimulate the principal in-phase radio-frequency magnetic field and the capacitive component being used to stimulate the principal in-phase electric field and the said two fields being placed so as to cross-stress the space surrounding the antenna in an interaction zone, the resonant circuit having the electric field in phase with the potential on the capacitive stimulator but in the said circuit the current fed to the resonant transformer being directed through parallel parts of a toroidal coal in order to stimulate the necessary in phase magnetic field thus resolving the criterion of in-phase electrical alternation of electric and magnetic fields.
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31. A radio transmitting or receiving antenna which is physically compact being typically no more than three percent of a wavelength in any dimension the antenna comprising two electrical conducting surfaces across which radio frequency electric field lines each carrying half the power are arranged to cross radio frequency magnetic field lines carrying the remaining half power to thereby feeds through a set of coils wired in parallel and lying in a toroidal shape to create a circular RF magnetic field and then passes to a low impedance tap on a resonant autotransformer used to connect a high RF voltage and create a curving electric field across the interaction zone in the volume between the two electrical conducting surfaces.
Specification