Extension of operating ranges of coaxial matched loads

Abstract

The new coaxial matched load design with chip resistor and stepped transformer is described in this study. The proposed structure exhibits lower reflection and a wider range of operating frequencies than standard coaxial loads. Electromagnetic energy is absorbed in this design by a tantalum resistor on an Al₂O₃ substrate, which makes the manufacturing process simple and inexpensive. The reflection characteristics of the load under study were simulated numerically using a simplified model that included only the main parts of the load structure. Additional experimental studies made it possible to find the dimensions of the chip and other parts of the load design that provide improved electromagnetic characteristics.

KEYWORDS:

• Coaxial load
• reflection
• planar resistor
• substrate

Disclosure statement

No potential conflict of interest was reported by the author(s).

Additional information

Notes on contributors

Vyacheslav V. Komarov

Vyacheslav V. Komarov received the Ph.D. degree in Radio Physics from the Saratov State University in 1994, and the D.Sc. degree in Antennas and Microwave Devices from the Yuri Gagarin State Technical University of Saratov, Russia, in 2007. He is currently professor at the Department of Radio Electronics and Telecommunications of the Yuri Gagarin State Technical University of Saratov, Saratov, Russia. In 2014 he has been awarded the Premium of Russian Federation Government in Science and Engineering. His current research interests include mathematical modeling and CAD of passive microwave and terahertz devices, frequency selective surfaces, mm-wave mesh devices, and propagation of electromagnetic waves in complex media.

Valeriy P. Meschanov

Valeriy P. Meschanov received the Ph.D. degree in microwave engineering from the All-Union Research Institute of Radio Engineering, Moscow, Russia, in 1972, and the D.Sc. in microwave engineering from the Moscow Physics and Engineering Institute, Moscow, Russia, in 1985. Since 1965, he has been with the Central Institute of Measuring Equipment, Saratov, Russia, as a Researcher, Chief of the Laboratory, and Head of the Department of Microwave Device Development. He is currently the director of the open joint-stock company «NIKA-SVCH» (Saratov, RF). Dr. Meschanov was the recipient of the 1993 State Prize of the Russian Federation and in 2014 he has been awarded the Premium of Russian Federation Government in Science and Engineering. His research interests include synthesis of microwave devices, optimization methods, mathematical modeling, and microwave measuring equipment.

Nataliya F. Popova

Nataliya F. Popova received the PhD degree in microwave engineering from the Belarusian State University of Informatics and Radio Electronics in 1990. Since 1973, she has been with the Central Institute of Measuring Equipment, Saratov, Russia, as a researcher. She is the vice-director in science of the open joint-stock company «NIKA-SVCH» (Saratov, RF). Her research interests include analysis and CAD of microwave devices, and microwave measuring equipment.