Design of A Dual-channel Slip Ring with High Isolation for Radar Applications

A two-channel slip ring with high isolation for radar application is discussed. The slip ring consists of two similar signal channel with the same operate frequency and there isolation channel to improve the character of isolation. The radius of the hollow cylinder in the center of the slip ring is about 16 mm. Both channels of the slip ring could operate work independently with high isolation. The isolation channels were placed on the both side of signal channel. The phase fluctuation of the two channels for a full turn is less than ±4.5 degree and the fluctuation of the VSWR for a complete turn is less than 0.3. The VSWR is less than 1.5 and the insertion loss is less than 0.2 dB. The isolation of the two channel in the full operating band is better than 50 dB.