Filtering Angular Displacement Sensor Based on Transversal Section With Parallel-Coupled-Line Path and U-Shaped Coupled Slotline

Chio, Chi-Hou; Tam, Kam‐Weng; Gómez‐García, Roberto

doi:10.1109/jsen.2021.3133452

Cited by 21 publications

(9 citation statements)

References 32 publications

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“…The proposed bandpass filter/sensor and the state-of-art filter/sensors in the literature are compared in Table 3. Since the multifunctional filter/sensors in the literature are limited to [40] and [41], additional displacement sensors based on phase variation in [35], [37], and a displacement sensor based on frequency shift [36] are also included in the table. Note that while the first half of the table is dedicated to sensors that can only sense displacement, the second half showcases multifunctional filter/sensor components that are larger in size due to their added functionality.…”

Section: Resultsmentioning

confidence: 99%

“…The sensor proposed in [37], which is based on gap waveguide technology, has a higher dynamic range and moderate sensitivity, but it operates at a higher frequency and is larger in size. The filter/sensor presented in [40], which is an angular sensor co-integrated with a UWB filter with 110% FBW, is based on the variations of the frequency (rather than phase) and has a sensitivity of 2.27 MHz/ • . The table also shows the sensitivity and dynamic range of the multifunctional filter/sensor presented in [41] and the one presented in this study.…”

Section: Resultsmentioning

confidence: 99%

“…However, new multifunctional RF circuits with filtering/sensing capabilities are required, especially in IoT networks, where the collected data from various sensors need to be processed and sent through a wireless communication system. The first attempt to address the demand for multifunctional filter/sensor components has been presented in [40]. The filter/sensor proposed in [40] is an ultra-wideband (UWB) filter that features a controllable transmission zero within the passband region.…”

Section: Introductionmentioning

confidence: 99%

“…The first attempt to address the demand for multifunctional filter/sensor components has been presented in [40]. The filter/sensor proposed in [40] is an ultra-wideband (UWB) filter that features a controllable transmission zero within the passband region. The position of this transmission zero is changed by adjusting the angular displacement of a rotatable section.…”

Section: Introductionmentioning

confidence: 99%

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Multifunctional Bandpass Filter/Displacement Sensor Component

Shaterian

Mrozowski

2023

IEEE Access

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This paper presents the design and realization of a multifunctional bandpassfilter/displacement-sensor using an edge-coupled microstrip bandpass filter loaded by a pair of split ring resonators (SRRs). It is shown that while the structure acts as a bandpass filter at its operating frequency, the phase of the reflection coefficient from a movable loading resonator at the resonance frequency of the resonator can be used for displacement sensing. With this aim, and to avoid any interference with the filter functionality, the resonance frequency of the SRRs is chosen within the stopband of the bandpass filter, where all the input signal is reflected back to the input port. Therefore, moving the loading resonators does not have any adverse effect on the filtering performance. To validate the concept, a fifth-order Chebyshev bandpass filter with a feed line loaded with a pair of SRRs is designed and the numerical evaluation of the proposed multifunctional bandpass-filter/displacement-sensor is provided. The proposed multifunctional component is also validated through fabrication and measurement. It is shown that the proposed component has a sensitivity of 8 • /mm at the designed frequency of SRRs. However, the sensitivity can be increased by scaling the SRRs to resonate at a higher frequency within the upper stopband of the filter.INDEX TERMS Bandpass filter, displacement sensor, multifunctional microwave component, phase, split ring resonator (SRR).

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Multifunctional Bandpass Filter/Displacement Sensor Component

Shaterian

Mrozowski

2023

IEEE Access

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“…been proposed in the literature. The transversal signal interference technique was employed in [14], [15] for the detection of angular displacement. The technique consists of a fixed-length transmission line on one path and a variable-length on the other.…”

Section: Introductionmentioning

confidence: 99%

Polarimetric Microwave Sensor for Angular Speed Measurement

2022

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This paper presents a design methodology and prototyping of an angular speed sensor based on microwave polarimetry. The detection mechanism relies on the transmission response of a dual-polarized circular aperture irradiating an array of regularly spaced copper traces. The generated response is a regular pulse train defined by the location of a copper trace with reference to the center of the circular aperture. For speed measurement, the response was acquired within a 10s duration with the circular aperture response effectively sampled at 100 Hz. The acquired response was analyzed in the frequency domain using Fast Fourier Transform (FFT) and the rotor speed was obtained from the frequency spectrum of the acquired pulse train. The detection system can detect speeds as low as 0.4 RPM with an upper limit of 5000 RPM limited by the maximum sampling rate of the acquisition system. With the adoption of the FFT technique for speed estimation, the proposed angular speed measurement system can instantaneously detect angular speed with a maximum absolute estimation error of 0.0625 RPM within the 10 s acquisition time. The rotor occupies an area of 84.64 cm 2 .

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Microwave angular displacement sensor with wideband matching and impedance transforming

Zhu

Cheong

Tam

et al. 2023

Electronics Letters

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This work proposes a microwave angular displacement sensor with wideband matching based on a wideband impedance transformer. According to the design requirement of the microstrip impedance transformer (load‐to‐source impedance of 250‐to‐50 Ω, centre frequency of 2.40 GHz) with Chebyshev frequency response, the proposed angular displacement sensor is explored for the high bandwidth sensitivity of 11.18 MHz/degree.

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Filtering Angular Displacement Sensor Based on Transversal Section With Parallel-Coupled-Line Path and U-Shaped Coupled Slotline

Cited by 21 publications

References 32 publications

Multifunctional Bandpass Filter/Displacement Sensor Component

Multifunctional Bandpass Filter/Displacement Sensor Component

Polarimetric Microwave Sensor for Angular Speed Measurement

Microwave angular displacement sensor with wideband matching and impedance transforming

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