MEASUREMENTS AND SIMULATIONS OF MICRON-SIZE COPLANAR WAVE-GUIDES

Measurements and simulations have been done on a coplanar waveguide, w hich consists of a pair of slots which taper down to a separation and width of micron size. The purpose of this device is to permit one to c oncentrate microwaves or millimeter waves on magnetic samples of the o rder of a micron in order to do ferrimagnetic resonance (FMR) studies on such small samples. The transmission coefficient as a function of f requency found in the simulations agrees quite well with the measureme nts. The simulations show that the magnetic field at the pinch is abou t a factor of several thousand larger than the field of the incident w ave. Results for the circuit parameters found from the simulations wil l be compared to the values for these parameters measured for this dev ice, and the prospects for using the device for FMR studies on micron and submicron magnetic particles will be discussed. (C) 1997 American Institute of Physics.