A low cost, printed microwave based level sensor with integrated oscillator readout circuitry

Muhammad Akram Karimi; Muhammad Arsalan; Atif Shamim

doi:10.1109/MWSYM.2017.8058980

A low cost, printed microwave based level sensor with integrated oscillator readout circuitry

Muhammad Akram Karimi, Muhammad Arsalan, Atif Shamim

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution › peer-review

6 Scopus citations

Abstract

This paper presents an extremely low cost, tube conformable, printed T-resonator based microwave level sensor, whose resonance frequency shifts by changing the level of fluids inside the tube. Printed T-resonator forms the frequency selective element of the tunable oscillator. Unlike typical band-pass resonators, T-resonator has a band-notch characteristics because of which it has been integrated with an unstable amplifying unit having negative resistance in the desired frequency range. Magnitude and phase of input reflection coefficient of the transistor has been optimized over the desired frequency range. Phase flattening technique has been introduced to maximize the frequency shift of the oscillator. With the help of this technique, we were able to enhance the percentage tuning of the oscillator manifolds which resulted into a level sensor with higher sensitivity. The interface level of fluids (oil and water in our case) causes a relative change in oscillation frequency by more than 50% compared to maximum frequency shift of 8% reported earlier with dielectric tunable oscillators.

Original language	English (US)
Title of host publication	2017 IEEE MTT-S International Microwave Symposium, IMS 2017
Publisher	Institute of Electrical and Electronics Engineers Inc.
Pages	1742-1745
Number of pages	4
ISBN (Electronic)	9781509063604
DOIs	https://doi.org/10.1109/MWSYM.2017.8058980
State	Published - Oct 4 2017
Event	2017 IEEE MTT-S International Microwave Symposium, IMS 2017 - Honololu, United States Duration: Jun 4 2017 → Jun 9 2017

Publication series

Name	IEEE MTT-S International Microwave Symposium Digest
ISSN (Print)	0149-645X

Conference

Conference	2017 IEEE MTT-S International Microwave Symposium, IMS 2017
Country/Territory	United States
City	Honololu
Period	06/4/17 → 06/9/17

Bibliographical note

Publisher Copyright:
© 2017 IEEE.

Keywords

Level Sensor
Microwave oscillator
Printed low-cost sensor
T-resonator

ASJC Scopus subject areas

Radiation
Condensed Matter Physics
Electrical and Electronic Engineering

Access to Document

10.1109/MWSYM.2017.8058980

Cite this

Karimi, M. A., Arsalan, M., & Shamim, A. (2017). A low cost, printed microwave based level sensor with integrated oscillator readout circuitry. In 2017 IEEE MTT-S International Microwave Symposium, IMS 2017 (pp. 1742-1745). Article 8058980 (IEEE MTT-S International Microwave Symposium Digest). Institute of Electrical and Electronics Engineers Inc.. https://doi.org/10.1109/MWSYM.2017.8058980

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abstract = "This paper presents an extremely low cost, tube conformable, printed T-resonator based microwave level sensor, whose resonance frequency shifts by changing the level of fluids inside the tube. Printed T-resonator forms the frequency selective element of the tunable oscillator. Unlike typical band-pass resonators, T-resonator has a band-notch characteristics because of which it has been integrated with an unstable amplifying unit having negative resistance in the desired frequency range. Magnitude and phase of input reflection coefficient of the transistor has been optimized over the desired frequency range. Phase flattening technique has been introduced to maximize the frequency shift of the oscillator. With the help of this technique, we were able to enhance the percentage tuning of the oscillator manifolds which resulted into a level sensor with higher sensitivity. The interface level of fluids (oil and water in our case) causes a relative change in oscillation frequency by more than 50% compared to maximum frequency shift of 8% reported earlier with dielectric tunable oscillators.",

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Karimi, MA, Arsalan, M & Shamim, A 2017, A low cost, printed microwave based level sensor with integrated oscillator readout circuitry. in 2017 IEEE MTT-S International Microwave Symposium, IMS 2017., 8058980, IEEE MTT-S International Microwave Symposium Digest, Institute of Electrical and Electronics Engineers Inc., pp. 1742-1745, 2017 IEEE MTT-S International Microwave Symposium, IMS 2017, Honololu, United States, 06/4/17. https://doi.org/10.1109/MWSYM.2017.8058980

A low cost, printed microwave based level sensor with integrated oscillator readout circuitry. / Karimi, Muhammad Akram; Arsalan, Muhammad; Shamim, Atif.
2017 IEEE MTT-S International Microwave Symposium, IMS 2017. Institute of Electrical and Electronics Engineers Inc., 2017. p. 1742-1745 8058980 (IEEE MTT-S International Microwave Symposium Digest).

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution › peer-review

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N2 - This paper presents an extremely low cost, tube conformable, printed T-resonator based microwave level sensor, whose resonance frequency shifts by changing the level of fluids inside the tube. Printed T-resonator forms the frequency selective element of the tunable oscillator. Unlike typical band-pass resonators, T-resonator has a band-notch characteristics because of which it has been integrated with an unstable amplifying unit having negative resistance in the desired frequency range. Magnitude and phase of input reflection coefficient of the transistor has been optimized over the desired frequency range. Phase flattening technique has been introduced to maximize the frequency shift of the oscillator. With the help of this technique, we were able to enhance the percentage tuning of the oscillator manifolds which resulted into a level sensor with higher sensitivity. The interface level of fluids (oil and water in our case) causes a relative change in oscillation frequency by more than 50% compared to maximum frequency shift of 8% reported earlier with dielectric tunable oscillators.

AB - This paper presents an extremely low cost, tube conformable, printed T-resonator based microwave level sensor, whose resonance frequency shifts by changing the level of fluids inside the tube. Printed T-resonator forms the frequency selective element of the tunable oscillator. Unlike typical band-pass resonators, T-resonator has a band-notch characteristics because of which it has been integrated with an unstable amplifying unit having negative resistance in the desired frequency range. Magnitude and phase of input reflection coefficient of the transistor has been optimized over the desired frequency range. Phase flattening technique has been introduced to maximize the frequency shift of the oscillator. With the help of this technique, we were able to enhance the percentage tuning of the oscillator manifolds which resulted into a level sensor with higher sensitivity. The interface level of fluids (oil and water in our case) causes a relative change in oscillation frequency by more than 50% compared to maximum frequency shift of 8% reported earlier with dielectric tunable oscillators.

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A low cost, printed microwave based level sensor with integrated oscillator readout circuitry

Abstract

Publication series

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Bibliographical note

Keywords

ASJC Scopus subject areas

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