Fixed tuned oscillators are generally
required for many applications
including as reference sources, fixed
local oscillators and radars. These oscillators
are generally characterized
by low frequency drift and low phase
noise. A high Q resonator is the key
element for this type of oscillator. A
wide range of resonators with varying
Q factors are presently available.
From low Q planar transmission line
resonators to the highest Q sapphire
loaded resonators, there are a number
of different types of resonators