Three dimensional structures can have high geometric factors and have
thus been favoured in applications requiring high Q resonant elements,
In this paper the surface resistance of YBCO thick film materials mea
sured in the frequency range 1-10 GHz in a variety of resonant structu
res is discussed, The power dependence of the materials in the 1 to 2
GHz region is also examined and at these frequencies it is possible to
attain Q's of over 150000 using thick film materials.