Patent ID: 9705197
Date: 2017-07-11
CPC Classifications: G06F,H01Q,Y10T

Claim:
1. A method for improved filtering in an antenna system of a wireless communication device, the method comprising in any order: (i) providing a modal antenna including: (ii) configuring the antenna radiating element to produce a first frequency response including at least one first resonance spanning a first band of the modal antenna, wherein the first frequency response further includes a first roll-off associated with a first end of the first band and a second roll-off associated with a second end of the first band; and (iii) configuring the first parasitic element to provide a second frequency response of the modal antenna, wherein the second frequency response includes the at least one first resonance spanning the first band and further includes an adjusted roll-off associated one of the first and second ends of the first band, the adjusted roll-off being sharper than the corresponding first or second roll-off; wherein the sharper adjusted roll-off of the second frequency response provides improved filtering of RF signals.