Abstract: A resonance frequency shift amount ?f and a peak level change amount ?P are measured using a microwave resonator, V1 and V2 are obtained based on V1=(?f·??2/Kf??P·??2/Kp)/(??1·??2???1·??2), and V2=(?f·??1/Kf??P·??1/Kp)/(??1·??2???1·??2), and an absolute dry basis weight and a moisture amount are obtained based on absolute dry basis weight=?·V1, and moisture amount=?·V2. For the constants Kf, Kp, ??1, ??2, ??1 and ??2, the constants ??1, ??2, ??1 and ??2 are determined so that the variance values of Kf and Kp are smaller than a predetermined value.

Abstract: A first isolator, which is disposed in a direction where a signal is transmitted only to an antenna direction, is connected directly to a connector portion of an antenna on an oscillation side without a cable, and a second isolator 15b, which is disposed in a direction where a signal is transmitted only to a receiver direction, is connected directly to the connector portion of the antenna on a receiver side without a cable. A data processing apparatus includes a peak level detector, a resonant frequency detector, and an arithmetic part for calculating a moisture content amount and a coating amount of a coating layer of a sample based on the detection values detected by these detectors.

Abstract: A resonance frequency shift amount ?f and a peak level change amount ?P are measured using a microwave resonator, V1 and V2 are obtained based on V1=(?f·??2/Kf??P·??2/Kp)/(??1·??2???1·??2), and V2=(?f·??1/Kf??P·??1/Kp)/(??1·??2???1·??2), and an absolute dry basis weight and a moisture amount are obtained based on absolute dry basis weight=?·V1, and moisture amount=?·V2. For the constants Kf, Kp, c?1, ??2, ??1 and ??2, the constants ??1, ??2, ??1 and ??2 are determined so that the variance values of Kf and Kp are smaller than a predetermined value.

Abstract: A grammage measuring apparatus including a dielectric resonator which is arranged only at one side surface of a sample; a shielding container with which the dielectric resonator is substantially covered except for a sample measuring surface; a microwave excitation device which causes the dielectric resonator to generate an electric field vector; a detection device which detects transmission energy or reflection energy by the dielectric resonator; a storage device in which a calibration curve indicating a resonance frequency shift amount for a grammage is stored; and a data processing device which calculates the grammage of a measuring sample from the calibration curve and measurement result of the resonance frequency shift amount of the measuring sample.

Abstract: A method of measuring moisture content, wherein, as an example, a microwave cavity resonator with two holed iris plates that are arranged vertically in tube axis at the mid point of a wave guide is used. A specimen is disposed in a slit formed at a resonator portion between the iris plates, and a resonance peak level is measured in real time. Based on a difference in resonance peak level between cases when the specimen is not present in the slit and the specimen is present in the slit, the moisture content or the moisture percentage of the specimen is obtained.

Abstract: A grammage measuring apparatus includes a dielectric resonator which is arranged only at one surface side of a sample; a shielding container with which the dielectric resonator is substantially covered except for a sample measuring surface; a microwave excitation device which causes the dielectric resonator to generate an electric field vector; a detection device which detects transmission energy or reflection energy by the dielectric resonator; a storage device in which a calibration curve indicating a resonance frequency shift amount for a grammage is stored; and a data processing device which calculates the grammage of a measuring sample from the calibration curve and measurement result of the resonance frequency shift amount of the measuring sample.