Isolator

The utility model discloses an isolator, which relates to the technical field of isolator design and manufacture and comprises a magnetic shielding shell, and a permanent magnet, a first metal cavity, a central conductor, a gyromagnet substrate, a medium cavity, a magnetic circuit compensating plate, a second metal cavity and the like which are arranged in the magnetic shielding shell, a single-sided permanent magnet is adopted to magnetize gyromagnetic ferrite, and a magnetic circuit compensation sheet is added on the other side of a gyromagnetic ferrite substrate, so that a strong uniform field is obtained in the gyromagnetic ferrite substrate, and the height of a device is reduced on the premise of ensuring that the performance of the isolator is not influenced and the plane size of the device is greatly increased. According to the isolator, the strip-shaped metal connecting wire is arranged at the grounding end of the grid inductor stacked on the upper portion, the reflection coefficients of the three por