7.4.1 Cavity Resonator
Minimizes External Rf Interference
The layout of an SIW cavity resonator
fed by a combination of a microstrip line, a quarter-wave stub, and an inset feed is shown in Figure 1.
The previous analysis is general and describes the behavior of a spherical cavity resonator
made of arbitrary materials (both the filler and wall).
[13.] Angiulli, G., "Design of square substrate waveguide cavity resonators
: Compensation of modelling errors by support vector regression machines," American Journal of Applied Sciences, Vol.
There are two main types of single-mode cavity resonators
used in microwave heating applicators.
Here, [Omega] is the angular eigenfrequency when the sample is inserted in the cavity resonator
, [[Omega].sub.a] is the angular eigenfrequency when no sample is inserted in the cavity resonator
, [E.sub.a] is the electric field strength of microwave, [H.sub.a] is the magnetic field strength of microwave, W is the total energy stored in the cavity resonator
, [Delta]V is the volume of the sample where the microwaves passes, V is the volume of the whole cavity resonator
, P is the dielectric polarization of the sample, M is the magnetization and J is the electric current density.
Zhao, "RF evanescent-mode cavity resonator
for passive wireless sensor applications," Sensors & Actuators A Physical, vol.
A magnetically tunable cavity resonator
based on SIW technology was reported in .
Gronlund, "An antenna illuminated by a cavity resonator
," Proceedings of the IEEE, vol.
Yom, "A Ka-band multilayer LTCC 4-pole bandpass filter using dual-mode cavity resonators
," 2008 IEEE MTT-S International Microwave Symposium Digest, 1235-1238, Jun.
The proposed negative coupling structure can also be applied to the air cavity resonator
Base on the primary parameters from calculations, the complete filter parameters are fine tuned by slight alterations of each cavity resonator
related the actual LTCC process and each coupling in turn until the filter response is optimized to achieve the desired response by using commercial full wave electromagnetic simulation software HFSS.