The N-gate/P-well varactor structure includes P+ implant regions formed in a P-well implant layer of the varactor.

The P-gate/N-well varactor structure includes N+ implant regions (16) formed in an N-well implant layer (17) of the varactor.

According to the number of varactors selected in the shunt varactor, B, this frequency step can be made programmable.

O Diced: this variant is heartier than the other two.

Varactor Diode Varactor diode is called varicap or variable capacitance diode.

The tuning varactor preferably has a wide tuning capacitance range.

The P+ implant regions comprise the source and the drain of a varactor.

The varactor structure is completely electrically isolated from the substrate (20) of the IC by an oxide layer (18) of the SOI substrate and by oxide-filled trenches formed on both sides of the varactor structures.

The N+ implant regions (6) comprise the source and the drain of a varactor.

The varactor tuned antennas intercept components of electromagnetic radiation that are substantially orthogonally polarized.

A low resistance capacitor electrode makes it possible to obtain a high quality capacitor or varactor.

The LC-resonator circuit includes at least one tuning varactor and two high Q inductors.

A varactor diode having a stepped capacitance-voltage profile, formed in heterostructural integrated circuit technology.

A low power switched diversity antenna system (200) includes two varactor tuned antennas (205, 207), each including an antenna element and a varactor.

The invention relates to semiconductor devices, specifically varicap (varactor) semiconductor devices whose reactance can be altered by varying the voltage.