A new miniature magnetic field probe for measuring three-dimensional fields in planar high-frequency circuits

Gao, Yingjie; Wolff, I.

doi:10.1109/22.506451

Cited by 85 publications

(5 citation statements)

References 8 publications

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“…However, the vessel thickness of the alkali metal gas, the strict temperature control, and the thermal diffusion motion of the gas limit the resolution of the microwave field imaging image on the surface of the device to be measured. The resolution of the microwave field on the chip surface measured using the alkali metal gas chamber only reaches 150 × 100 × 100μm 3 . SQUID microscopy is a scanning microwave magnetic field detection technique consisting of a superconducting loop with two Josephus superconducting junctions connected in parallel; 7 it has high sensitivity and spatial resolution.…”

Section: Introductionmentioning

confidence: 98%

“…The conventional microwave field measurement techniques are mainly based on miniature magnetic probes, supercooled atoms, superconducting quantum interferometer (SQUID), and spin Hall devices. Gao et al 3 designed a small microwave magnetic probe to visualize phase and three-dimensional (3D) vector fields of microwave magnetic fields emitted from microstrip lines. However, the size of the probe limits the imaging resolution to only reaching the millimeter scale.…”

Section: Introductionmentioning

confidence: 99%

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Wide-field microwave imaging using nitrogen-vacancy center ensembles in diamond

Liang

Shen

et al. 2022

Opt. Eng.

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.Microwave chips dependent devices constitute the cornerstone of many classical and emerging quantum technologies. To meet the demand for high-resolution, lossless, and fast wide-field imaging of microwave devices, we propose a wide-field microwave imaging method based on diamond nitrogen-vacancy center ensembles by combining continuous wave optically detected magnetic resonance technology with optical wide-field imaging technology. First, the optimal selection of laser parameters is achieved by measuring different laser powers. Then the accuracy of the wide-field microwave imaging technique is demonstrated by measuring the near-field imaging of the antenna surface at different microwave input powers and different microwave input frequencies. The spatial resolution of the imaging system is 5 μm over a field of view of 2400 μm × 1350 μm, and the optimal microwave precision measurement sensitivity is 5.6 μT / Hz1/2. The above results are expected to provide a practical reference for applications such as fault diagnosis of highly integrated microwave circuits, antenna radiation profiling, and electro magnetic compatibility testing of integrated microwave circuits.

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Section: Introductionmentioning

confidence: 98%

Section: Introductionmentioning

confidence: 99%

Wide-field microwave imaging using nitrogen-vacancy center ensembles in diamond

Liang

Shen

et al. 2022

Opt. Eng.

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“…[2][3][4][5][6] A magnetic near-field probe consists of a single loop used for coupling a magnetic field and a transmission line structure to transmit signals. 7 When the loop couples magnetic field, the normal electric field also generates common mode (CM) signals， which reduces the accuracy of magnetic field measurement, so the design of a magnetic field probe with high CM suppression is necessarily important.…”

Section: Introductionmentioning

confidence: 99%

Differential magnetic probe based on balanced filter with high electric field suppression

Chu,

Chen,

Che

et al. 2023

Micro & Optical Tech Letters

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A differential magnetic field probe based on a balanced filter is proposed to improve electric field suppression. The probe comprises a rectangular metal loop for detection and a balanced filter transmission. Three 1/4λ stepped impedance transmission lines are designed between the detective part and balanced filter for impedance matching. The balanced filter can suppress the common mode signals generated by a normal electric field but has little influence on the differential signals detected by a tangential magnetic field thus, the electric field suppression of the magnetic probe can be enhanced. The measurement results show that the working frequency of the proposed magnetic probe ranges from 10 to 20 GHz, and the electric field suppression ratio is over 35 dB from 10 to 15 GHz.

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“…The probe is then miniaturized to a simple low‐cost loop made of a printed circuit board (PCB) without electromagnetic shielding. The disadvantage is that this type of probe cannot isolate unwanted electric field coupling . In contrast, the magnetic probes with electric shielding offer better suppression of unwanted electric field and provide a better spatial resolution when they are fabricated with multilayer thick film on silicon and glass substrates, thin film on a glass substrate and multilayer low‐temperature co‐fired ceramics .…”

Section: Introductionmentioning

confidence: 99%

Design of a low‐cost 1‐20 GHz magnetic near‐field probe with FR‐4 printed circuit board

Namahoot

Akkaraekthalin

Chalermwisutkul

2019

Int J RF Microw Comput Aided Eng

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An ultra‐wideband magnetic near‐field probe based on a conventional low‐cost four layers of FR‐4 printed circuit board is proposed in this article. It can be used to measure the magnetic near‐field strength from RF magnetic sources or electronic devices for EMI conformance test. The operating frequency of the probe is from 1 GHz up to 20 GHz. The probe is constructed based on a coplanar waveguide and stripline with a short‐end loop. The probe dimension is 10 mm × 25 mm × 0.6 mm. The prototype probe is electric field‐shield structure and has a very high unwanted electric field suppression ratio about 17.7 dB. The probe calibration factor from the simulation agrees well with the calibration factor computed from the measurement. The average probe factor is 38.8 dBS/m and probe sensitivity is 47.4 dB μA/m.

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A new miniature magnetic field probe for measuring three-dimensional fields in planar high-frequency circuits

Cited by 85 publications

References 8 publications

Wide-field microwave imaging using nitrogen-vacancy center ensembles in diamond

Wide-field microwave imaging using nitrogen-vacancy center ensembles in diamond

Differential magnetic probe based on balanced filter with high electric field suppression

Design of a low‐cost 1‐20 GHz magnetic near‐field probe with FR‐4 printed circuit board

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