Complex pieces of equipment, such as satellite communications and radar equipment, rely on microwave cavity resonators to get the job done. These closed, or mostly closed, cylindrical units are made from the best materials for radio frequency applications and designed to exact specifications different for various types of equipment, but the average citizen may not know what they do, where they are used, or how often they are encountered.
What Do They Do?
Radio cavity resonators are hollow or filled with an electrical insulating material and are designed to confine electromagnetic fields. Microwave resonators are the type designed to confine waves in that spectrum. When RF waves are funneled to these units, they allow specific frequencies to pass while keeping others out, filtering similar signals away from the one you are looking for. The electromagnetic permittivity of the materials used to make these units, hollow or not, have an impact on how much signal loss equipment experiences, so the higher quality the materials, the higher quality the results.
Where Are They Used?
Microwave cavity resonators are used to create microwave signals in transmitters and oscilloscopes, to separate a frequency of wave in radio equipment and microwave ovens and can even be used to manipulate charged particles in particle accelerators. The versatility of various electromagnetic fields has created uses for resonators and complementary units for civilian, military and industrial needs, and new uses are being developed all the time.
Radio frequency cavity resonators aid important systems such as satellite communications, radar tracking systems and microwave ovens by creating microwave signals, separating specific frequencies and manipulating charged particles, depending on the type of equipment they are installed in. These resonators work by directing electromagnetic fields into the cavity and allowing only the right frequencies to pass to other parts of the equipment.