A microwave transistor oscillator that uses a ceramic dielectric of high Q factor for the resonator element. Dielectric resonators (DRs) are low-loss, temperature-stable ceramics and resonate in various modes, depending upon the detailed composition and dimensions. The DR is usually a solid cylindrical puck, and in practice this is placed close to the microstrip transmission line to enable magnetic coupling between them; the DR behaves like a high-Q cavity resonator at the oscillation frequency. A schematic FET common-source DRO is shown in the diagram, with the DR resonating the input port.
FET common-source dielectric resonator oscillator
- uphole survey
- uphole time
- upline
- uplink
- upload
- up operation
- Upper and Lower Canada
- upper atmosphere
- Upper-Atmosphere Research Satellite
- upper bound
- upper critical temperature
- upper culmination
- upper flammable limit
- upper limit
- Upper Palaeolithic
- upper percentage point
- upper quartile
- upper sideband
- upper-tail probability
- upper triangular matrix
- upregulation
- upright fold
- UPS
- upsampling
- upset