Designing SAW resonators and DRO oscillators using nonlinear CAD tools

Rohde, Ulrich L.

doi:10.1109/freq.1995.483925

Cited by 4 publications

(2 citation statements)

References 6 publications

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“…Distributed oscillators will not be analyzed as this group of oscillators forms a minority in integrated transceiver systems and entails an entirely different analysis approach compared to oscillators with components that can be considered lumped. Examples of distributed oscillators can be found in [ 43,44].…”

Section: Distributed Oscillator Designmentioning

confidence: 99%

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High-Frequency Oscillator Design for Integrated Transceivers

Tang¹

2005

The International Series in Engineering and Computer Science

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Section: Distributed Oscillator Designmentioning

confidence: 99%

“…Figure 2.4(b) shows an implementation of a distributed resonator-based oscillator. In a Dielectric Resonator Oscillator (DRO), the DR is placed adjacent to a micro strip-line, which implements the coupling between the resonator and the oscillator [43] . The crystal oscillator in Figure 2.4(c) belongs to the same group as the DRO.…”

Section: Classificationmentioning

confidence: 99%

High-Frequency Oscillator Design for Integrated Transceivers

Tang¹

2005

The International Series in Engineering and Computer Science

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Oscillators

2003

Circuit Design for RF Transceivers

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Noncontact Proximity Vital Sign Sensor Based on PLL for Sensitivity Enhancement

Hong

Kim

et al. 2014

IEEE Trans. Biomed. Circuits Syst.

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In this paper, a noncontact proximity vital sign sensor, using a phase locked loop (PLL) incorporated with voltage controlled oscillator (VCO) built-in planar type circular resonator, is proposed to enhance sensitivity in severe environments. The planar type circular resonator acts as a series feedback element of the VCO as well as a near-field receiving antenna. The frequency deviation of the VCO related to the body proximity effect ranges from 0.07 MHz/mm to 1.8 MHz/mm (6.8 mV/mm to 205 mV/mm in sensitivity) up to a distance of 50 mm, while the amount of VCO drift is about 21 MHz in the condition of 60 (°)C temperature range and discrete component tolerance of ± 5%. Total frequency variation occurs in the capture range of the PLL which is 60 MHz. Thus, its loop control voltage converts the amount of frequency deviation into a difference of direct current (DC) voltage, which is utilized to extract vital signs regardless of the ambient temperature. The experimental results reveal that the proposed sensor placed 50 mm away from a subject can reliably detect respiration and heartbeat signals without the ambiguity of harmonic signals caused by respiration signal at an operating frequency of 2.4 GHz.

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Designing SAW resonators and DRO oscillators using nonlinear CAD tools

Cited by 4 publications

References 6 publications

High-Frequency Oscillator Design for Integrated Transceivers

High-Frequency Oscillator Design for Integrated Transceivers

Oscillators

Noncontact Proximity Vital Sign Sensor Based on PLL for Sensitivity Enhancement

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