A SELF TUNED LOOP ANTENNA
Original Publication Date: 1997-Dec-01
Included in the Prior Art Database: 2002-Jun-11
A loop or coil antenna, in particular for use on means that an RF tag can be built more simply and such items as RF tags normally needs to be tuned at lower cost than at present. by a separate component to make the circuit resonate at the frequency of interest to obtain maxi- A conventional tuned circuit consists of a parallel mum efficiency. The technique disclosed here L-C circuit (using 2 components) as shown below. avoids the need for this extra component. This To manufacture this circuit as shown using a "printed" coil requires at least a two layer structure, as clearly to connect the capacitor between the two ends of the "spiral" is not possible while still tracking on a single layer.