A Compact, High Power Capable, and Tunable High Directivity Microstrip Coupler Article Swipe

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Sung‐Min Sohn , A. Gopinath , J. Thomas Vaughan ·

YOU? · · 2016 · Open Access · · DOI: https://doi.org/10.1109/tmtt.2016.2602835

A coupler is an indispensable component to sample the forward and reflected power for the real-time radio frequency (RF) power monitoring system. The directivity of a coupler is a critical factor to achieve accurate RF power measurements. This paper proposes a microstrip coupler with a tunable high directivity circuit to accurately measure the reflected RF power. The directivity tuner composed of passive components adjusts phase and amplitude of the coupled RF signal, and cancel out the leakage signal from the RF input port at the coupled reflection port. The experimental results, which agree with simulation results, show that the microstrip coupler with the directivity tuner circuit has a compact size (~ 0.07 λ_g x 0.05 λ_g), high power capability (up to 1 kW), and high directivities (more than 40 dB) at operating frequency bands (f = 297.3 MHz, 400 MHz, and 447 MHz, respectively) for magnetic resonance imaging (MRI) applications.

Related Topics

Power Dividers And Directional Couplers

Toyota Fortuner

Rf Power Amplifier

Electrical Engineering

Concepts

Directivity Hybrid coupler Tuner Microstrip Rat-race coupler Radio frequency RF power amplifier Magic tee Power dividers and directional couplers Electrical engineering Materials science Engineering Antenna (radio) Amplifier CMOS

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Type: article
Language: en
Landing Page: https://doi.org/10.1109/tmtt.2016.2602835
OA Status: green
Cited By: 19
References: 19
Related Works: 10
OpenAlex ID: https://openalex.org/W2518689980

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OpenAlex ID: https://openalex.org/W2518689980

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DOI: https://doi.org/10.1109/tmtt.2016.2602835

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Title: A Compact, High Power Capable, and Tunable High Directivity Microstrip Coupler

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Type: article

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Language: en

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Publication year: 2016

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Publication date: 2016-09-12

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Authors: Sung‐Min Sohn, A. Gopinath, J. Thomas Vaughan

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Landing page: https://doi.org/10.1109/tmtt.2016.2602835

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Open access: Yes

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OA status: green

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OA URL: https://doi.org/10.1109/TMTT.2016.2602835

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Concepts: Directivity, Hybrid coupler, Tuner, Microstrip, Rat-race coupler, Radio frequency, RF power amplifier, Magic tee, Power dividers and directional couplers, Electrical engineering, Materials science, Engineering, Antenna (radio), Amplifier, CMOS

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Cited by: 19

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Citations by year (recent): 2025: 2, 2024: 6, 2023: 2, 2021: 1, 2020: 3

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References (count): 19

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Related works (count): 10

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