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Two types of resistive sensors with flat frequency response for microwave pulse power measurements in X-band rectangular waveguide WR-90 up to 100 kW were developed and experimentally investigated. The first type of the sensors demonstrates higher sensitivity and larger output signal, while the second one exhibits better linearity of the output signal. The experimental investigations revealed the...
We present new experimental evidence indicating the importance of magnetic field component of microwave field (f=9.4 GHz) for magnetoresistive properties of polycrystalline La_{0.7}Ca_{0.3}MnO_3 films. The microwave measurements revealed a different character of the temperature-dependent electrical resistance of polycrystalline La_{0.7}Ca_{0.3}MnO_3 films placed in the centre (maximal amplitude of...
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