Resonance Frequency
Resonance is, is the frequency, response
of system’s to the affects depending on the frequency for which system
responses with greater amplitude. When the system has the maximum amplitude
response (relatively), we can call these frequencies as resonance frequency.
For resonance frequencies small effects causes greater changes. Also resonance
occurs in the system when the system have capacity of two or more different
types of energy which can be stored and transferred energy easily. [1]
Cavity Resonators
At
the lower mode of frequencies, the oscillation and amplification is carried out
by conventional wires and transistors networks. At the higher mode of
frequencies above 3 MHz conventional wires and transistors networks are not
applicable due to the skin effect and stray inductance/capacitance. The cavity
resonator has been used for the system which has frequencies above than 3 Mhz. Most resonant
cavities are made from closed (or short-circuited) sections of waveguide or high-permittivity dielectric material.
The input and output ports are designed to carry RF signals. Resonator’s
conducting sides works as inductors and it’s open sides works as capacitors
specified length of the microwave frequencies. With explained information
cavity resonators works as an amplifier for it increases the frequency of the
system. Besides
electric and magnetic energy is stored in the cavities, the only losses are due
to finite conductivity of cavity
walls and dielectric losses of material
filling the cavity.[2]
