Method and apparatus for wireless communication utilizing electrical and magnetic polarization
View Patent ↗A method of wireless communication is disclosed, in which polarization diversity can be utilized to improve fading performance or to increase the capacity of the communication channel in a scattering environment. Complementary signal information is impressed upon, or derived from, corresponding electric and magnetic polarized field components of a transmitted or intercepted electromagnetic wave. Four, five, or even six independent signal channels can thereby be utilized for communication using a localized antenna arrangement.
1. A communication device, comprising:
in an antenna arrangement, two dipole elements that together define a plane, and a loop element oriented substantially parallel to said plane; and
transmitter circuitry that in operation is effective for applying a distinct carrier-level signal to each of said dipole and loop elements, thereby to transmit information from the antenna arrangement at least at one communication wavelength;
wherein the two dipole elements and the loop element together occupy a space no greater than one communication wavelength in maximum extent parallel to said plane, and no greater than one-fourth a communication wavelength in extent perpendicular to said plane.
2. The device of claim 1 , wherein the two dipole elements and the loop elements and the loop element together occupy a space no greater than one-tenth a communication wavelength in extent perpendicular to said plane.
3. A communication device for wireless communication at least at one communication wavelength, comprising:
in an antenna arrangement, two dipole elements that together define a plane, and a loop element oriented substantially parallel to said plane; and
receiver circuitry that in operation is effective for obtaining a demodulated signal from each of said dipole and loop elements and for recovering from said demodulated signals information in at least one communication channel;
wherein the two dipole elements and the loop element together occupy a space no greater than one communication wavelength in maximum extent parallel to said plane, and no greater than one-fourth a communication wavelength in extent perpendicular to said plane.
4. The device of claim 3 , wherein the two dipole elements and the loop element together occupy a space no greater than one-tenth a communication wavelength in extent perpendicular to said plane.