Oscillators and filters require things such as microwave resonators to reach optimal performance. The types of resonators that are popular include coaxial, dielectric, crystal, and ceramic. Because there is such a variety, it is crucial to understand the difference between them.
1. Coaxial Resonators
Coaxial resonators are famous for components like voltage-controlled oscillators and filters. They are often used because they create a high-quality-factor inductor and can be paired with a capacitor to create a resonating circuit. This type is a ceramic and coaxial mix. Generally, it will have an outer conductor with a square-shaped cross-section and a round center conductor.
2. Dielectric Resonators
Dielectric resonators are used in oscillators and filters to replace resonant cavities. They are often used because they allow circuits to be drastically smaller. Because the electromagnetic fields are primarily confined within this type of resonator, radiation losses are minimal, and a high-quality factor can be achieved. This type will typically be a disc shape.
3. Crystal Resonators
Quartz crystals can be used as high-quality electromagnetic resonators. Because of their piezoelectric properties, they are typically used as frequency control elements in oscillators. These also make excellent resonators because they offer a high-quality factor and are very stable. This makes them one of the best options out there.
4. Ceramic Resonators
Ceramic resonators are an alternative to crystals. They work for the same things and have piezoelectric properties. Although they tend to be less accurate, they have unique benefits. For instance, they can be made smaller and are cheaper. They can also be faster than crystals.
There are a wide variety of resonators available. Because of this, you need to understand the different types and how they can be used. Keep in mind that each variety is excellent for a specific job, so you need to remember this when you are designing products.