Patent ID: 7538641
Filing Date: 2009-05-26
Classification: H01P,H01Q,H05K

Abstract:
1. A high-frequency electromagnetic circuit comprising: a capacitive element comprising a first and a second conducting surface, the first conducting surface being connected to a first connection terminal, the second conducting surface being connected to a second connection terminal; and an inductive element comprising a conducting strip having two ends, a first end of the conducting strip being connected to the first connection terminal and a second end of the conducting strip being connected to the second connection terminal so that the inductive element is connected in parallel with the capacitive element; wherein the first conducting surface, the second conducting surface and the conducting strip are arranged on a common layer of a dielectric substrate; wherein the high-frequency electromagnetic circuit is operative at a first operating frequency; wherein the conducting strip has an electrical length smaller than a quarter of an operating free-space wavelength, the operating free-space wavelength being defined by the first operating frequency; wherein at least a portion of a perimeter of the first conducting surface is a first curve comprising a plurality of connected segments, said plurality of segments being smaller than a tenth of the operating free-space wavelength and being spatially arranged in such a way that no pair of adjacent and connected segments forms another longer straight segment; and wherein at least a portion of a perimeter of the second conducting surface is a second curve comprising a plurality of connected segments, said plurality of segments being smaller than a tenth of the operating free-space wavelength and being spatially arranged in such a way that no pair of adjacent and connected segments forms another longer straight segment.