Ferrite microwave isolators and circulators long known and widely used in various electronic systems. The development of technology of unmanned aerial vehicles, air defense systems and electronic surveillance are placing new demands on overall dimension of microwave devices. Microstrip circulator can be divided into two parts. The first part consists of a ferrite substrate on which the method of vacuum evaporation is formed outdoor dielectric resonator, and the second part includes the magnetic system.The most common configuration of a resonator is presented on Fig.1. After optimization, it gives the opportunity to get the best values of electromagnetic parameters.
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| Fig.1 a) Scheme with inductive matching | b) Scheme with capacitive matching |
This topology does not allow the creation of superminiature device at frequencies lower than 6 GHz. It is obvious that dimensions of the isolator or the circulator will depend on the diameter of the resonator and the linear dimensions of the magnetic system itself. Furthermore, the requirement of electromagnetic matching imposes certain restrictions on the size of the diameter of the magnet. It should not be less than the diameter of the resonator, which is applied to the ferrite substrate. As a result of years of research has developed a chip that makes it possible to solve this problem (Fig. 2). The diameter of the magnet in such a circulator is not a critical parameter and may be considerably less than the linear dimensions of the ferrite resonator.
Magnetic system
Fig. 2 Scheme with capacitive coordination
We are engaged in the development and production of ferrite microstrip decoupling devices for over 30 years. Here, the site presents both standard and new experimental models for which more research continues. You can study in detail their features and options. We specialize in the manufacture of small batches of devices.