Antenna with multiple resonant coupling loops
AssigneeMicrosoft Technology Licensing, LLC
InventorMarc Harper
Life of this patent
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Abstract
An antenna arrangement with an active radiating element forming a plurality of inductively-coupled resonating loop antennas drives a parasitic radiating element. The active radiating element is electrically coupled to a feed contact and tuned according to one or more variable capacitors and inductors. The active radiating element drives the parasitic radiating element into a state of resonance for transmitting and receiving wireless communication radiofrequency waves. The antenna arrangement provides a relatively stable return loss profile over a wide frequency band, which may be adjusted to fit a desired communications band.
Claims20
A device comprising:
- a radiofrequency signal source;
- a dielectric substrate;
- an active resonating element routed across the surface of the dielectric substrate and driven by the radiofrequency signal source, the active resonating element forming a plurality of inductively-coupled loop antennas;
- a parasitic resonating element capacitively driven by the inductively-coupled loop antennas.
A method comprising:
- providing a radiofrequency signal source, a dielectric substrate, a parasitic resonating element, and an active resonating element, the active resonating element forming a plurality of inductively-coupled resonating loop antennas;
- driving the active resonating element by the radiofrequency signal source, the active resonating element feeding the parasitic resonating element.
An antenna-based device comprising:
- a computing device case;
- a radiofrequency signal source disposed inside the computing device case;
- a dielectric substrate disposed inside the computing device case;
- an active resonating element routed across the surface of the dielectric substrate and driven by the radiofrequency signal source, the active resonating element forming a plurality of inductively-coupled resonating loop antennas, the active resonating element further electrically connected to the ground plane;
- a parasitic resonating element capacitively driven by the inductively-coupled resonating loop antennas;
- a radio transceiver communicatively coupled to the active resonating element, the radio transceiver configured to send and receive radio transmissions via the parasitic resonating element.
Dependencies are inferred from the claim text.