ANTENNA DEVICE OF MRI DEVICE

PURPOSE:To improve the orthogonal performance with the simple constitution by connecting a capacitance between an outside ring element installed outside of one between two ring elements connected with both the edges of at least four rectilinear elements and the above-described ring elements. CONSTITUTION:An Aldermann glant type coil is formed by connecting two ring elements 15 and 16 at both the edges of four rectilinear elements 11-14, and fixed capacitances C1-C4 are inserted into the ring element 15, and outside the ring element 16, an outside ring element 17 is arranged, and variable capacitances C5-C9 are connected therebetween. Accordingly, the orthogonal balance between two orthogonal channels is improved by the outside ring element 17. Further, the capacitance C5-C9 connected between the outside ring element 17 and one ring element 16 operate as neutralization capacitances for offsetting the bonding between two channels. Accordingly, the bonding between two channels is offset with the simple constitution by the simple adjustment and the orthogonal performance is improved.