The present invention discloses an LC tank capable of reducing electromagnetic radiation by itself and the manufacturing method of the same. An embodiment of said LC tank comprises: a first tank area whose boundary is defined by a first part of an inductance; a second tank area whose boundary is defined by a second part of the inductance in which the second part includes a gap; a cross-interconnection structure operable to electrically connect the first and second parts of the inductance and distinguish the first tank area from the second tank area; and at least one capacitance formed inside at least one of the first and second tank areas, wherein the area ratio of the first tank area to the second tank area is between 20% and 80%.

A tunable resonator includes at least one tunable capacitor coupled with at least one tunable inductor. The tunable resonator includes a mechanical tuning mechanism coupled with a connecting bridge and with first and second electrodes of the tunable inductor. The mechanical tuning mechanism also moves the first and second electrodes of the tunable inductor relative to an electrode of the tunable capacitor, and providing a force down onto or to pull up a connecting bridge to tune the tunable inductor.