Diode-ka dareeraha waa diode gaar ah oo si gaar ah loo qaabeeyey iyadoo la raacayo mabda'a ah in awoodda isgoysyada "isgoyska PN" ee gudaha diode caadiga ah ay isbeddeli karto isbeddelka tamarta gadaal ee codsatay.

Varactor diode waxaa inta badan loo isticmaalaa wareegga-soo-celinta-soo-noqoshada-sare ee wareegga taleefanka gacanta ama khadka dhulka ee talefoonka aan xadhigga lahayn si loo xaqiijiyo beddelka calaamadda soo noqnoqoshada hoose ee signalka-soo noqnoqda sare oo sii daayo. Xaaladda shaqada, korantada modulation diode varactor diode guud ahaan waxaa lagu daraa korantada taban Samee awoodda gudaha ee diode-ka varactor is beddelka korantada modulation.

Diode-ka varactor-ka wuu guuldarraystaa, inta badan wuxuu u muuqdaa mid daadsan ama waxqabad liito:

(1) Marka dheecaanku dhaco, wareegga isbedbeddelka-sare ee wareegga ma shaqeyn doono ama waxqabadka habaynta ayaa sii xumaan doona.

(2) Marka waxqabadka varactor-ka uu xumaado, hawlgalka wareegga is-beddelka-sare ee wareegga-sare waa mid aan xasilloonayn, iyo calaamadda-soo-noqoshada-sare ee la hagaajiyay ayaa loo diraa dhinaca kale oo ay ka heshay dhinaca kale.

Marka mid ka mid ah xaaladaha kor ku xusan ay dhacdo, diode varactor ee qaab isku mid ah waa in la beddelaa.