Search research articles

ABOUT JoVE

Overview Leadership Blog JoVE Help Center

AUTHORS

Publishing Process Editorial Board Scope & Policies Peer Review FAQ Submit

LIBRARIANS

Testimonials Subscriptions Access Resources Library Advisory Board FAQ

RESEARCH

JoVE Journal Methods Collections JoVE Encyclopedia of Experiments Archive

EDUCATION

JoVE Core JoVE Business JoVE Science Education JoVE Lab Manual Faculty Resource Center Faculty Site

Terms & Conditions of Use

Related Concept Videos

Double Resonance Techniques: Overview

Double Resonance Techniques: Overview

Double resonance techniques in Nuclear Magnetic Resonance (NMR) spectroscopy involve the simultaneous application of two different frequencies or radiofrequency pulses to manipulate and observe two distinct nuclear spins. One important application of double resonance is spin decoupling, which selectively suppresses coupling with one type of nucleus while observing the NMR signal from another nucleus, simplifying the spectrum and enhancing resolution.
Spin decoupling is usually achieved by...

You might also read

Related Articles

Articles linked to this work by shared authors, journal, and citation graph.

Sort by

Same author

Do anti-CD36 antibodies cause only fetal/neonatal alloimmune thrombocytopenia?

British journal of haematology·2023

Same author

The effect of health literacy, self-efficacy, social support and fear of disease progression on the health-related quality of life of patients with cancer in China: a structural equation model.

Health and quality of life outcomes·2023

Same author

Integration of Theory and Practice in Medical Morphology Curriculum in Postgraduate Training: A Flipped Classroom and Case-based Learning Exercise.

Current medical science·2023

Same author

Role of Macrophages in the Pathogenesis of Genotype VII Newcastle Disease Virus in Chickens.

Animals : an open access journal from MDPI·2023

Same author

Insight into sludge dewatering by periodate driven directly with Fe(Ⅱ): Extracellular polymeric substances solubilization and mineralization.

Journal of environmental management·2023

Same author

Phase I study of chlorogenic acid injection for recurrent high-grade glioma with long-term follow-up.

Cancer biology & medicine·2023

Search research articles

Related Experiment Video

Updated: Jun 3, 2025

Recombination Dynamics in Thin-film Photovoltaic Materials via Time-resolved Microwave Conductivity

Recombination Dynamics in Thin-film Photovoltaic Materials via Time-resolved Microwave Conductivity

Published on: March 6, 2017

Reanalysis on Performance of Microwave Phase Detector for Multisignals.

Jing Deng¹, Hongxun Wang¹, Xin Xiang¹

¹Aviation Engineering School, Air Force Engineering University, Xi'an 710038, China.

Sensors (Basel, Switzerland)

|January 8, 2025

Summary

This study reveals that multiple signals interacting within microwave phase detectors (MPDs) cause intermodulation effects, leading to significant errors in instantaneous frequency measurement (IFM) and phase interferometer direction finding (PIF-DF) systems.

Keywords:

intermodulation effects microwave phase detectors (MPDs)multiple signals noisy electromagnetic environment

More Related Videos

Carrier Lifetime Measurements in Semiconductors through the Microwave Photoconductivity Decay Method

Carrier Lifetime Measurements in Semiconductors through the Microwave Photoconductivity Decay Method

Published on: April 18, 2019

Microfluidic Platform with Multiplexed Electronic Detection for Spatial Tracking of Particles

Microfluidic Platform with Multiplexed Electronic Detection for Spatial Tracking of Particles

Published on: March 13, 2017

Related Experiment Videos

Last Updated: Jun 3, 2025

Recombination Dynamics in Thin-film Photovoltaic Materials via Time-resolved Microwave Conductivity

Recombination Dynamics in Thin-film Photovoltaic Materials via Time-resolved Microwave Conductivity

Published on: March 6, 2017

Carrier Lifetime Measurements in Semiconductors through the Microwave Photoconductivity Decay Method

Carrier Lifetime Measurements in Semiconductors through the Microwave Photoconductivity Decay Method

Published on: April 18, 2019

Microfluidic Platform with Multiplexed Electronic Detection for Spatial Tracking of Particles

Microfluidic Platform with Multiplexed Electronic Detection for Spatial Tracking of Particles

Published on: March 13, 2017

Area of Science:

Electrical Engineering
Signal Processing
Electromagnetics

Background:

Microwave phase detectors (MPDs) are critical for Instantaneous Frequency Measurement (IFM) and Phase Interferometer Direction Finding (PIF-DF) receivers.
Conventional MPD analyses often overlook performance under multi-signal environments, common in complex electromagnetic scenarios.

Purpose of the Study:

To re-evaluate microwave phase detector (MPD) characteristics when subjected to multiple simultaneous radio frequency (RF) signals.
To quantitatively analyze filter effects and differential amplifier impacts on MPDs in multi-signal conditions.

Main Methods:

Developed a step-by-step mathematical model to simulate signal flow through MPDs with multiple inputs.
Incorporated filter effects and differential amplifier behavior into the MPD model.
Evaluated new MPD response characteristics via simulation.

Main Results:

Identified and modeled cross-talk terms between signals, introducing intermodulation effects.
Observed simultaneous zero-forcing and extreme-forcing intermodulation effects in crosspoint and near-frequency regions.
Quantified significant deviations and errors in MPD output due to these intermodulation effects.

Conclusions:

Intermodulation effects in MPDs under multi-signal conditions cause substantial output errors.
These findings have critical implications for the accuracy and reliability of IFM and PIF-DF receivers.
Further research is needed to mitigate these identified intermodulation distortions.