Loading [MathJax]/extensions/MathZoom.js
Anton Widarta - IEEE Xplore Author Profile
Access provided by:

MIT Libraries

Sign Out
Access provided by:

MIT Libraries

Sign Out
ADVANCED SEARCH

Author details

< Back

Anton Widarta

Also published under: A. Widarta

Publications
30
Citations
104
Publications by Year
19952024
Co-Authors:
Show All Co-Authors (18)
Image of author Anton Widarta

Anton Widarta

Also published under: A. Widarta

Affiliation

National Metrology Institute of Japan, NMIJ National Institute of Advanced Industrial Science and Technology, AIST

Publication Topics

Biography

Anton Widarta was born in Magelang, Indonesia. He received the Doctor of Engineering degree from Nihon University, Tokyo, Japan, in 1996. His doctoral work focused on accurate analyses of the electromagnetic field problems in waveguide junctions and discontinuities.,He is currently a Senior Research Scientist with the Electromagnetic Waves Division, National Metrology Institute of Japan (NMIJ), National Institute of Advanced Industrial Science and Technology, Tsukuba, Japan. In 2000, he started to develop a new broadband-RF attenuation-measurement system to replace the former Japan national standard of attenuation. He also prepared a technical manual for the system under the NMIJ quality system for primary standards and served as a Deputy T...
Publications
30
Citations
104
Publications by Year
19952024
Co-Authors:
Show All Co-Authors (18)
Author's Published Works

Showing 1-25 of 30 results

  • Sort

Filter Results

Show

Sort By

Results

Summary of CCEM Key Comparison CCEM.RF-K26: Attenuation at 18 GHz, 26.5 GHz and 40 GHz using a Step Attenuator

Anton Widarta

2024 Conference on Precision Electromagnetic Measurements (CPEM)
Year: 2024 | Conference Paper |
This paper summarizes the results of the Key Comparison CCEM.RF-K26: Attenuation at 18 GHz, 26.5 GHz and 40 GHz using a step attenuator which has been performed from January 2015 to February 2018. Fourteen National Metrology Institutes (NMIs) participated in this key comparison, and the Key Comparison Reference Values (KCRVs) were determined from the measurement results of five to ten participatin...Show More

Summary of CCEM Key Comparison CCEM.RF-K26: Attenuation at 18 GHz, 26.5 GHz and 40 GHz using a Step Attenuator

Anton Widarta

Year: 2024 | Conference Paper |

A 30 MHz Phase Shifting Circuit for Calibration of Dual Channel RF Attenuation and Phase Measurement Systems

Anton Widarta

2024 Conference on Precision Electromagnetic Measurements (CPEM)
Year: 2024 | Conference Paper |
A precision 30-MHz phase-shifting circuit has been experimentally constructed for accuracy testing and calibration of dual-channel RF attenuation and phase-shift measurement systems. The circuit is a re-routing circuit that can recombine RF input signals with the same amplitude but whose phase can be set arbitrarily, resulting in calculable RF attenuation and phase-shift values.Show More

A 30 MHz Phase Shifting Circuit for Calibration of Dual Channel RF Attenuation and Phase Measurement Systems

Anton Widarta

Year: 2024 | Conference Paper |

Antenna Measurement System Using the Lock-in Amplifier

S. Kurokawa;A. Widarta

2023 IEEE-APS Topical Conference on Antennas and Propagation in Wireless Communications (APWC)
Year: 2023 | Conference Paper |
We have proposed a microwave and antenna measurement system using the intermediate frequency (IF) substitution method. The proposed method is based on the RF attenuation standard measurement method in the frequency range from 9 kHz to 50 GHz that have been established at the National Metrology Institute of Japan (NMIJ/AIST) [1] [2].Show More

Antenna Measurement System Using the Lock-in Amplifier

S. Kurokawa;A. Widarta

Year: 2023 | Conference Paper |

Optical Fiber Link Millimeter Wave Antenna Measurement System Using the Lock-in Amplifier

Satoru Kurokawa;Anton Widarta;Michitaka Ameya;Masanobu Hirose;Yoshikazu Toba

2023 Antenna Measurement Techniques Association Symposium (AMTA)
Year: 2023 | Conference Paper |
Cited by: Papers (2)
We have newly developed an optical fiber link millimeter wave band vector measurement system. The system consists of an optical fiber link millimeter wave transmission system, an optical fiber link millimeter wave receiving system, and the IF substitution method configuration using a lock-in amplifier (without a vector network analyzer). In this paper, we show the developed millimeter wave measure...Show More

Optical Fiber Link Millimeter Wave Antenna Measurement System Using the Lock-in Amplifier

Satoru Kurokawa;Anton Widarta;Michitaka Ameya;Masanobu Hirose;Yoshikazu Toba

Year: 2023 | Conference Paper |

Precision Phase Shift Measurement System in the Frequency Range of 1-18 GHz

Anton Widarta

2020 50th European Microwave Conference (EuMC)
Year: 2021 | Conference Paper |
Cited by: Papers (1)
The precision phase shift measurement system and standard of the National Metrology Institute of Japan (NMIJ) - the dual channel intermediate (IF) substitution null system using a unique programmable IF phase shifter as a reference standard- is improved to cover the frequency measurement range of 1-18 GHz. The features of the improved circuit and its functions are described. The basic characterist...Show More

Precision Phase Shift Measurement System in the Frequency Range of 1-18 GHz

Anton Widarta

Year: 2021 | Conference Paper |

Primary Standard of Attenuation in the Frequency Range of 1 kHz to 10 MHz

Anton Widarta

2020 Conference on Precision Electromagnetic Measurements (CPEM)
Year: 2020 | Conference Paper |
Cited by: Papers (3)
Primary standard of attenuation in the frequency range of 1 kHz to 10 MHz is developed to meet the demands in recent EMC regulations that require traceability of measurements to national standards. A null detection system with an IVD as a reference standard is constructed to allow attenuation at 1 kHz, 9 kHz, and 10 kHz to be measured accurately by comparing to the voltage ratio of the IVD. Attenu...Show More

Primary Standard of Attenuation in the Frequency Range of 1 kHz to 10 MHz

Anton Widarta

Year: 2020 | Conference Paper |

Broadband RF Attenuation Standards for Traceability of Antenna and EMC Measurements in Japan

Anton Widarta

2019 IEEE Conference on Antenna Measurements & Applications (CAMA)
Year: 2019 | Conference Paper |
Cited by: Papers (1)
Attenuation standards in the frequency range of 9 kHz to 50 GHz have been established at the National Metrology Institute of Japan (NMIJ/AIST) for ensuring traceability of antenna and EMC measurements in Japan. The standards were realized by two originally developed precision attenuation measurement systems based on the intermediate frequency (IF) substitution method. The first system works in the...Show More

Broadband RF Attenuation Standards for Traceability of Antenna and EMC Measurements in Japan

Anton Widarta

Year: 2019 | Conference Paper |

Null Technique for Precision RF Phase Shift Measurements

Anton Widarta

IEEE Transactions on Instrumentation and Measurement
Year: 2019 | Volume: 68, Issue: 6 | Journal Article |
Cited by: Papers (3)
A dual-channel intermediate frequency (IF) substitution null system is developed for precision phase shift measurements and standards in the frequency range from 1 MHz to 1 GHz. A particular programmable IF phase shifter equipped with a calibrated phase monitor is used as a phase reference standard. High-sensitivity nature of the null technique provides accurate measurements to the device under te...Show More

Null Technique for Precision RF Phase Shift Measurements

Anton Widarta

Year: 2019 | Volume: 68, Issue: 6 | Journal Article |

Null Technique for Precision RF Phase Shift Measurements

Anton Widarta

2018 Conference on Precision Electromagnetic Measurements (CPEM 2018)
Year: 2018 | Conference Paper |
Cited by: Papers (2)
A dual channel IF substitution null system is developed for precision phase shift measurements and standards in frequency ranges of 1 MHz to 1 GHz. A particular programmable IF phase shifter equipped with a calibrated phase monitor is used as a phase reference standard. High sensitivity nature of the null technique provides accurate measurements to the DUT even with large attenuation. Measurement ...Show More

Null Technique for Precision RF Phase Shift Measurements

Anton Widarta

Year: 2018 | Conference Paper |

Establishment of attenuation standards in the frequency range of 110 GHz to 170 GHz using a millimeter wave VNA system

Anton Widarta

2016 Conference on Precision Electromagnetic Measurements (CPEM 2016)
Year: 2016 | Conference Paper |
Cited by: Papers (3)
Establishment of an attenuation reference primary standard in the frequency range of 110 GHz to 170 GHz conducted at NMIJ is described. A millimeter wave VNA system, which consists of an intermediate frequency VNA and a set of millimeter wave S-parameter test extenders, is used as a measurement system. The traceability is ensured by the calibration to the intermediate frequency VNA using the calib...Show More

Establishment of attenuation standards in the frequency range of 110 GHz to 170 GHz using a millimeter wave VNA system

Anton Widarta

Year: 2016 | Conference Paper |

Development of RF attenuation measurement standard using VNA

Windi Kurnia Perangin-angin;Anton Widarta

2014 Asia-Pacific Microwave Conference
Year: 2014 | Conference Paper |
Development of RF attenuation standard using a commercial VNA is presented. Linearity of the VNA is measured and evaluated in detail for determining attenuation measurement ability and accuracy. An effective procedure to ensure the traceability to the attenuation primary standard is demonstrated by simply performing calibration on a single frequency. The nonlinearity of 0.001 dB for measurements u...Show More

Development of RF attenuation measurement standard using VNA

Windi Kurnia Perangin-angin;Anton Widarta

Year: 2014 | Conference Paper |

A consideration of traceability on the linearity of a millimeter wave VNA

Anton Widarta;Masahiro Horibe

2014 Asia-Pacific Microwave Conference
Year: 2014 | Conference Paper |
A technique to obtain traceability of the linearity of a millimeter wave VNA ranging from 110 GHz to 170 GHz is described. Calibration to IF receiver using the calibrated step attenuator at 10.3 MHz, ensures the traceability of the system to the attenuation primary standard. Good linearity was obtained with the difference at 0.005 dB for measurements range up to 40 dB.Show More

A consideration of traceability on the linearity of a millimeter wave VNA

Anton Widarta;Masahiro Horibe

Year: 2014 | Conference Paper |

Establishment of RF attenuation standard in the frequency range of 30 GHz to 50 GHz at NMIJ

Anton Widarta;Yuuto Katou

29th Conference on Precision Electromagnetic Measurements (CPEM 2014)
Year: 2014 | Conference Paper |
Cited by: Papers (1)
Establishment of RF attenuation standard in the frequency range of 30 GHz to 50 GHz conducted in NMIJ is described. Measurement system is constructed by adopting the simple and high stable IF receiver technique using a resistive step-attenuators, as an IF attenuation reference standard operated at 30 MHz and a general-purpose receiver, as a level detector. Traceability of the system is ensured by ...Show More

Establishment of RF attenuation standard in the frequency range of 30 GHz to 50 GHz at NMIJ

Anton Widarta;Yuuto Katou

Year: 2014 | Conference Paper |

Standards Research in Japan: Latest Development of Millimeter-Wave and Submillimeter-Wave Measurements

Masahiro Horibe;Kazuhiro Shimaoka;Katsumi Fujii;Anton Widarta;Hitoshi Iida;Ryoko Kishikawa

IEEE Microwave Magazine
Year: 2013 | Volume: 14, Issue: 7 | Magazine Article |
Cited by: Papers (6)
In recent communication networks, 100 Gb/s passive optical Ethernet networks have been established and started becoming widely used. In consumer broadcasting, the use of high-definition television in studio and live-relay broadcasts has been planned by the Japanese government. These high-speed wireless technologies require the millimeter-wave frequency band from 30 to 300 GHz to provide sufficient...Show More

Standards Research in Japan: Latest Development of Millimeter-Wave and Submillimeter-Wave Measurements

Masahiro Horibe;Kazuhiro Shimaoka;Katsumi Fujii;Anton Widarta;Hitoshi Iida;Ryoko Kishikawa

Year: 2013 | Volume: 14, Issue: 7 | Magazine Article |

Investigation of leakage in broadband RF and microwave attenuation measurement systems

A. Widarta

2013 International Conference on Electromagnetics in Advanced Applications (ICEAA)
Year: 2013 | Conference Paper |
Cited by: Papers (3)
A simple technique to estimate the attenuation uncertainty due to the leakage in RF and microwave high attenuation is presented. The principle applied in this technique is to execute high attenuation measurements of the device under test (DUT) in networks having phase differences of 0, 90, 180, 270 degrees, created using particular length of addition lines. Investigation on the measurement of 100 ...Show More

Investigation of leakage in broadband RF and microwave attenuation measurement systems

A. Widarta

Year: 2013 | Conference Paper |

Determination of RF source reflection coefficients using step attenuator measurement technique

Anton Widarta

2012 Conference on Precision electromagnetic Measurements
Year: 2012 | Conference Paper |
A simple technique based on the loss measurement of a step attenuator is presented to determine the source reflection coefficient of RF generators. The result is basically achieved from the difference between the substitution loss of the step attenuator in the network and the attenuation value. Experimental results on pseudo source reflection coefficients generated by the stub tuner and isolator a...Show More

Determination of RF source reflection coefficients using step attenuator measurement technique

Anton Widarta

Year: 2012 | Conference Paper |

Double step attenuation measurement technique for high attenuation of variable attenuators

Anton Widarta

2012 Conference on Precision electromagnetic Measurements
Year: 2012 | Conference Paper |
Cited by: Papers (3)
An accurate solution of a double step attenuation measurement technique with an internal gauge block for variable attenuators is presented. The solution is obtained by solving the signal flow graph of the circuit model with a small reflection coefficient (<;0.1) on each I/O port. Experimental results both of low and high attenuation values show good agreement with measurements of the conventional ...Show More

Double step attenuation measurement technique for high attenuation of variable attenuators

Anton Widarta

Year: 2012 | Conference Paper |

Attenuation-Measurement Technique With a Small Mismatch Uncertainty Using Phase Characteristics of Multiple Reflected Signals

Anton Widarta;Michiyuki Endo;Tomoteru Kawakami

IEEE Transactions on Instrumentation and Measurement
Year: 2011 | Volume: 60, Issue: 7 | Journal Article |
Cited by: Papers (5)
An accurate radio-frequency and microwave attenuation-measurement technique with a small mismatch uncertainty for continuous-frequency application has been developed by shifting the phase characteristics of the multiple reflected signals. A loss-measurement system in four different phase networks is set for this purpose by introducing two low-reflective lines (airlines) where the phase-shift value...Show More

Attenuation-Measurement Technique With a Small Mismatch Uncertainty Using Phase Characteristics of Multiple Reflected Signals

Anton Widarta;Michiyuki Endo;Tomoteru Kawakami

Year: 2011 | Volume: 60, Issue: 7 | Journal Article |

Mismatch correction in RF attenuation measurement using precision airlines

A. Widarta;M. Endo;T. Kawakami

CPEM 2010
Year: 2010 | Conference Paper |
Cited by: Papers (1)
The RF attenuation measurement technique with a small mismatch uncertainty [3] is improved to extend the frequency effectiveness. Three additional substitution loss measurements to the variable attenuator in different phases are realized by using precision airlines of arbitrary lengths where the phase shifts are known. As a result, attenuation measurements of arbitrary frequencies could be also ob...Show More

Mismatch correction in RF attenuation measurement using precision airlines

A. Widarta;M. Endo;T. Kawakami

Year: 2010 | Conference Paper |

Attenuation Standard in the Frequency Range of 50–75 GHz

Hitoshi Iida;Anton Widarta;Tomoteru Kawakami;Koji Komiyama

IEEE Transactions on Instrumentation and Measurement
Year: 2010 | Volume: 59, Issue: 11 | Journal Article |
Cited by: Papers (11)
An accurate primary standard has been constructed for RF attenuation measurements in the frequency range of 50-75 GHz. Based on the IF substitution method, it employs an inductive voltage divider (IVD) working at 10 kHz as a reference standard. A highly stable IF signal is obtained for precision measurement using phase-lock technology on the frequency-converted local signal. The IVD component is a...Show More

Attenuation Standard in the Frequency Range of 50–75 GHz

Hitoshi Iida;Anton Widarta;Tomoteru Kawakami;Koji Komiyama

Year: 2010 | Volume: 59, Issue: 11 | Journal Article |

A Simple RF Attenuation Measurement Technique With a Small Mismatch Uncertainty

Anton Widarta;Tomoteru Kawakami

IEEE Transactions on Instrumentation and Measurement
Year: 2009 | Volume: 58, Issue: 4 | Journal Article |
Cited by: Papers (2)
An accurate radio frequency (RF) and microwave attenuation measurement method is described, where source and load do not have to be matched to the line impedance and where the contribution of a mismatch effect to the uncertainty is reduced to about 0.002 dB. From loss measurements carried out for variable attenuators, as well as for attenuators of fixed attenuation values as devices under test, wh...Show More

A Simple RF Attenuation Measurement Technique With a Small Mismatch Uncertainty

Anton Widarta;Tomoteru Kawakami

Year: 2009 | Volume: 58, Issue: 4 | Journal Article |

A simple technique for precision RF attenuation measurement

A. Widarta;T. Kawakami

2008 Conference on Precision Electromagnetic Measurements Digest
Year: 2008 | Conference Paper |
Cited by: Papers (2)
An accurate RF attenuation measurement, with small mismatch effect, is achieved without source and load being matched to the line impedance. Insertion loss measurements to the DUT and to the DUT fitted by quarter-wavelength lines are carried out, then the attenuation is obtained simply, unrelated to the source and load reflection coefficients. Experiment results on two 20-dB attenuators at 11 GHz ...Show More

A simple technique for precision RF attenuation measurement

A. Widarta;T. Kawakami

Year: 2008 | Conference Paper |

An automated 1-kHz null-balance receiver for precision RF and microwave attenuation measurements and standards

Anton Widarta;Hitoshi Iida;Tomoteru Kawakami

2007 69th ARFTG Conference
Year: 2007 | Conference Paper |
Cited by: Papers (2)
An automated 1-kHz null-balance receiver for the RF attenuation measurement system based on the dual-channel intermediate frequency substitution method was constructed and examined. A commercial programmable inductive voltage divider (IVD) was applied as its attenuation reference; however, highly accurate voltage ratios were ensured by the developed voltage ratio standard system. It is shown that ...Show More

An automated 1-kHz null-balance receiver for precision RF and microwave attenuation measurements and standards

Anton Widarta;Hitoshi Iida;Tomoteru Kawakami

Year: 2007 | Conference Paper |

Attenuation-Measurement System in the Frequency Range of 18–40 GHz

Anton Widarta;Hitoshi Iida;Tomoteru Kawakami

IEEE Transactions on Instrumentation and Measurement
Year: 2007 | Volume: 56, Issue: 2 | Journal Article |
Cited by: Papers (9)
The attenuation-measurement system of the National Metrology Institute of Japan - the dual-channel intermediate-frequency (IF)-substitution method using an inductive-voltage divider (IVD) as a reference standard - is improved to cover the frequency measurement range of 18-40 GHz. Higher accuracy is obtained by raising the IF to 10 kHz and employing two seven-decade IVDs in cascade arrangement. The...Show More

Attenuation-Measurement System in the Frequency Range of 18–40 GHz

Anton Widarta;Hitoshi Iida;Tomoteru Kawakami

Year: 2007 | Volume: 56, Issue: 2 | Journal Article |

Perfect isolation in microwave dual channel measurement systems using an optical fiber assembly

A. Widarta;H. Iida;T. Kawakami;K. Komiyama

2005 European Microwave Conference
Year: 2005 | Conference Paper |
An optical fiber assembly consisted of a laser diode, optical fibers, optical modulator and photo detector is applied to obtain sufficient extremely high isolation between the channels in microwave dual channel measurement systems. Basic properties of the assembly are investigated and high accuracy measurement capabilities of the experimental setup of microwave attenuation measurement system using...Show More

Perfect isolation in microwave dual channel measurement systems using an optical fiber assembly

A. Widarta;H. Iida;T. Kawakami;K. Komiyama

Year: 2005 | Volume: 2 | Conference Paper |

IEEE Account

Purchase Details

Profile Information

Need Help?

A not-for-profit organization, IEEE is the world's largest technical professional organization dedicated to advancing technology for the benefit of humanity.
© Copyright 2025 IEEE - All rights reserved. Use of this web site signifies your agreement to the terms and conditions.