Passive reciprocal electronically tuneable inductance in a composite-right-left-handed metamaterial unit cell

A novel approach to tuneable, passive, reciprocal reactances is devised and applied to a basic composite right left handed metamaterial transmission line at UHF frequencies. A tuneable inductance rather than capacitance is chosen as exemplary circuit, highlighting some of the additional degrees-of-freedom for tuneable unit cells and RF devices composed thereof.