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To supply a power distribution network with stable power in a high-speed mixed mode system, simultaneous switching noise caused at the multilayer PCB and package structures needs to be sufficiently suppressed. The uni-planar compact electromagnetic bandgap (UC-EBG) structure is well known as a promising solution to suppress the power noise and isolate noise-sensitive analog/RF circuits from a noisy digital circuit. However, a typical UC-EBG structure has several severe problems, such as a limitation in the stop band's lower cutoff frequency and signal quality degradation. To make up for the defects of a conventional EBG structure, a partially located EBG structure with decoupling capacitors is proposed in this paper as a means of both suppressing the power noise propagation and minimizing the effects of the perforated reference plane on the signal quality. The proposed structure is validated and investigated through simulation and measurement in both frequency and time domains. [ABSTRACT FROM AUTHOR]

This paper shows a development of the isotropic electric-fields probe in the personal exposure meter. The personal exposure meter is a device for measurement of E-fields near the human body. To detect the exposed E-fields, a 3-axis E-fields probe is used in the personal exposure meter. The probe is consists of three orthogonal infinitesimal dipole antennas with schottky diodes and lossy transmission lines using chip resistors. The proposed probe bandwidth is 10 MHz to 6 GHz and the isotropic deviation of the proposed probe radiation pattern is less than 0.5 dB in the simulation results. Finally, the fabricated probe will be shown and the properties of the probe such as a linearity and radiation pattern of the probe are presented. [ABSTRACT FROM AUTHOR]