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Disclosed is an antenna comprising a loop element (10) and an Electric-field radiator (30), wherein the E-field radiator is electrically coupled to the loop element such that at the frequency of operation, there is a substantially 90 degree phase difference between the Electric and Magnetic fields p

Disclosed is an antenna comprising a loop element (10) and an Electric-field radiator (30), wherein the E-field radiator is electrically coupled to the loop element such that at the frequency of operation, there is a substantially 90 degree phase difference between the Electric and Magnetic fields produced by the antenna.

대표청구항 ▼

1. A microstrip antenna, comprising; a loop element;a phase tracker including a triangular element conductively coupled to the loop element that alters an electric length of the loop element in response to an RS signal applied to the loop element; andan electric-field radiator electrically coupled t

1. A microstrip antenna, comprising; a loop element;a phase tracker including a triangular element conductively coupled to the loop element that alters an electric length of the loop element in response to an RS signal applied to the loop element; andan electric-field radiator electrically coupled to the circumference of the loop element at a position, at the frequency of operation, that creates a substantially 90 degree phase difference between an electric field and a magnetic field produced by the antenna. 2. The antenna of claim 1, wherein the electric-field radiator is a quarter-wavelength antenna. 3. The antenna of claim 1, wherein the electric-field radiator is a patch antenna. 4. The antenna of claim 1, wherein the phase tracker is positioned within the loop element and the position of the electric-field radiator is on an outside of the loop element and on a same side of the loop element as the phase tracker. 5. The antenna of claim 1, wherein the phase tracker is positioned within the loop element and the position of the electric-field radiator is on an outside of the loop element and on an opposite side of the loop element as the phase tracker. 6. The antenna of claim 1, wherein the phase tracker is electrically equivalent to a plurality of L-C components, only some of which resonate at any given frequency and alter the electrical length of the loop. 7. The antenna of claim 1, wherein the RF signal is between approximately 1.8GHz and approximately 2.7GHz. 8. A method of transmitting or receiving an RF signal using a microstrip antenna comprising the steps of: generating a magnetic field with at least a loop element;altering an electric length of the loop element in response to an RF signal applied to the loop element through use of a phase tracker including a triangular element conductively coupled to the loop element; andgenerating an electric field substantially 90 degrees out of phase from the magnetic field, at a frequency of operation, through use of at least an electric-field radiator electrically coupled to the circumference of the loop element. 9. The method of claim 8, wherein the electric-field radiator is a quarter-wavelength antenna. 10. The method of claim 8, wherein the electric-field radiator is a patch antenna. 11. The method of claim 8, wherein the phase tracker is positioned within the loop element and the position of the electric-field radiator is on the outside of the loop element and on a same side of the loop element as the phase tracker. 12. The method of claim 8, wherein the phase tracker is positioned within the loop element and the position of the electric-field radiator is on the outside of the loop element and on an opposite side of the loop element as the phase tracker. 13. The method of claim 8, wherein the phase tracker is electrically equivalent to a plurality of L-C components, only some of which resonate at any given frequency and alter the electrical length of the loop. 14. The method of claim 8, wherein the RF signal is between approximately 1.8GHz and approximately 2.7GHz.