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1. A micro-subminiature microwave gyromagnetic circulator, comprising a housing and a compensation sheet, a first magnet, a first iron sheet, a first ceramic ring ferrite, a central conductor, a second ceramic ring ferrite, a second iron sheet, a second magnet and a medium ferrule provided successively from top to bottom and mounted inside the housing; the medium ferrule comprises a connection seat and three pins provided on the connection seat, the central conductor is Y-shaped, and three feet of the central conductor are respectively provided with through-holes matching the pins; the first ceramic ring ferrite comprises a first ceramic ring and a first ferrite sleeved in the first ceramic ring, the second ceramic ring ferrite comprises a second ceramic ring and a second ferrite sleeved in the second ceramic ring, and the dielectric constant of the first ceramic ring ferrite and the dielectric constant of the second ceramic ring ferrite are respectively greater than or equal to 30; the first ferrite and the second ferrite are respectively BiCaVIG ferrites; the pin comprises an extension and a fixed portion which are connected, the diameter of the extension is smaller than the diameter of the fixed portion fixed on the connection seat, the pins and the feet are welded at the through-holes via solder paste, the connection of the extension and the fixed portion is provided with a tin-containing tank for receiving part of the solder paste, and a bottom surface of the foot abuts against an end surface of the fixed portion near one end of the extension.
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