Understanding the Features and Uses of Dielectric Resonator Oscillators

Dielectric Resonator Oscillators (DRO) are the oscillators that makes use of dielectric resonators as the frequency determining element while producing signals. These signals exhibit the features of exceptional signal stability, low micro-phonics, and high Q, making the oscillator known as a Dielectric Resonator Oscillator.

The resonant frequency of Dielectric Resonator Oscillators depends on its dielectric constant, the shape of the material used that may be rectangular or disc, and the physical dimensions of the material. In most of the cases the frequency of DRO is fixed but to get any desired result, a slight mechanical tuning can be achieved by a self-locking screw and or electrical tuning can be attained by an integrated Varactor diode.

In case of mechanical tuning, the resonant frequency can be modified by bringing a tuning screw close to the DRO. When you need to electrically tune it a mutually coupled resonant circuit is created by combining the Dielectric Resonator Oscillator to a microstrip line connected to the varactor. The resonant frequency varies according to the variation in bias voltage dependent capacitance of the varactor.

The features of Dielectric Resonator Oscillators include high Q-factor, exceptional temperature stability, very low phase noise, small size, and low cost, etc. You can place an order for a DRO at “sales@raditek.com”. A wide range of variants are available see Raditek Website.

Raditek offers Dielectric Resonant Oscillators (DRO) in the frequency range 3 to 42GHz. These Dielectric Resonant Oscillators (DRO) can be harmonically locked to either internal or external References and then are known as Phase Lock Oscillators (PLO) with low phase-noise and Stability to 5 ppm over 0 to 50°C. Raditek custom DROs use high-performance devices and deliver very low phase noise and spurious performance.