Fabrication of broad-band fiber-optic magnetic field probe and its application to intensity and phase distribution measurements of GHz-frequency magnetic field

Yamazaki,; Park, Hae‐Sim; Wakana,; Kishi,; Tsuchiya,

doi:10.1109/mwp.2002.1158864

Cited by 7 publications

(4 citation statements)

References 17 publications

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“…In comparison with measurement in a conventional anechoic chamber, the cables can be much shorter. An MO probe [76] combining an optical fiber and a magneto-optical device with even lower disturbance than the metallic loop is being studied as a device to pick up the magnetic field.…”

Section: Direct Observation Of the Equivalent Weight Vectormentioning

confidence: 99%

Electronically steerable parasitic array radiator antenna

Ohira

Iigusa

2004

Electron Comm Jpn Pt II

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SUMMARYThe electronically steerable parasitic array radiator antenna consists of one feed radiating element and parasitic radiating elements placed in the near field of the active radiator. A beam is formed due to spatial electromagnetic field coupling among radiating elements. The radiation pattern is electronically controlled by means of the variable capacitance devices (varactors) loading the parasitic elements. Unlike a conventional phased array, only one transmitter and receiver are needed for system configuration. Therefore, adaptive beamforming of low dissipation power and low fabrication cost can be achieved. On the other hand, there is only one output port to observe the signal and the weights can be controlled indirectly via reactors instead of direct control. In addition, due to interelement mutual coupling and the parasitic element being directly connected to the reactive device, the linear adaptive array theory developed to date cannot be applied straightforward. In this paper, the configuration of this antenna, its operating principle and formulation, and its measurement method, control scheme, and applications to signal processing are presented. We describe a mathematical model to simulate the radio frequency behavior of the antenna, the equivalent weight vector used for formulation of the characteristics, the admittance matrix including varactors, the effective element length, the equivalent steering vector method, the method for effectively extending the variable range of the capacitance of the varactor, the reactance circuit to cancel nonlinear distortions, the method for calibration of varactors and radiation pattern by measurement of near field of the radiating element, the learning criteria used to control radiation patterns autonomously in adaptation to the electromagnetic environment, the reactance optimization algorithm, the concept of the reactance domain signal processing and the direction of arrival estimation based on such a process, and diversity reception and spatial correlation.

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Section: Direct Observation Of the Equivalent Weight Vectormentioning

confidence: 99%

Electronically steerable parasitic array radiator antenna

Ohira

Iigusa

2004

Electron Comm Jpn Pt II

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“…What's more, existing IC EMI techniques, which use metallic probes, are fairly invasive when applied to single die, and the local boundary condition is changed significantly. [4][5][6] In this article, we proposed and developed a technique to image the microwave magnetic field on chip surface based on the nitrogen-vacancy center (NV) in diamond. This method has a spatial resolution only limited by the physical size of diamond crystal, which is typically on the order of submicron to a few micrometer.…”

Section: Introductionmentioning

confidence: 99%

Quantum near field probe for integrated circuits electromagnetic interference at wafer level

Yin

Liu

et al. 2021

Int J RF Mic Comp-Aid Eng

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With the complexity and integration of integrated chips increasing, existing integrated circuits electromagnetic interference techniques using metallic probes cannot meet the emerging demand at single die level or wafer level, which requires micron spatial resolution and ultraweak invasiveness. In this article, we developed a non-invasive near field probe in the fiber format using nitrogen-vacancy center in diamond, which was attached to the tip of fiber as microwave B-field sensing element. Subsequently, we applied the fiber diamond probe to near field scanning of a low noise amplifier chip and a power amplifier chip. Through numerical simulation, we find that the surface field strength is proportional to current density at chip surface, thus this probe can be used as a current imaging technique at microwave frequency.

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“…The coaxial probes that we have developed for EMC applications have a spatial resolution of 500 µm for monopole and around 1 mm for dipole probes which do not give enough experimental data with microelectronic components [7][8][9][10]. The optical probes can reach a spatial resolution under 100 µm and thus suitable for measuring microelectronic devices [11][12][13]. As a result, to improve the performance of our current near field bench based on passive detection with coaxial probes, and to analyze these interferences, we are currently developing another near-field test bench using optical technology based on the Pockels effect.…”

Section: Introductionmentioning

confidence: 99%

Improvement of Electrical Near-Field Measurements With an Electro-Optic Test Bench

David¹,

Baudry²,

Louis³

2012

PIER B

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Abstract-In this paper, two different kinds of near-field measurement techniques are presented. The first one uses coaxial probes that do not give precise measurements on microelectronic devices. We saw in [1] that the spatial resolution of these probes reaches 500 µm for monopole and is millimetric for dipole probe. The second one is based on the Pockels effect that converts an electromagnetic (EM) field into optical modulation. Our objective is to improve the E x /E y near-field measurement with this second technique. The performance of the electro-optic (EO) probe is compared with dipole probes of 2.5 and 5 mm with the use of simulations and measurements, on a wire above a ground plane and on coupled microstrip lines. At the end, a discussion about the technical limitations of the EO probe is made.

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Fabrication of broad-band fiber-optic magnetic field probe and its application to intensity and phase distribution measurements of GHz-frequency magnetic field

Abstract: Magneto-optic probes with bandwidths of 10 GHz or broader were implemented with the rotation magnetization in BiRlG crystals utilized. Two-dimensional RF magnetic field distributions were measured successfully over GHz-band microstrip line circuits.

Cited by 7 publications

References 17 publications

Electronically steerable parasitic array radiator antenna

Electronically steerable parasitic array radiator antenna

Quantum near field probe for integrated circuits electromagnetic interference at wafer level

Improvement of Electrical Near-Field Measurements With an Electro-Optic Test Bench

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