Safety analysis of 2-pin capacitor as 4-pin capacitor with frequency response




fail-safe, 4-pin capacitor, open fault, parallel coupled line


This paper presents an experiment to verify the safety effect of resolving an open capacitor failure by 4-pin capacitor structures or 2-pin capacitor structures by cut the copper pattern of the printed circuit board (PCB). Both solutions to the problem of open capacitor failure do not affect the next part of the circuit or devices in the operating frequency range of 100 kHz to 500 kHz. This research analyses the effect of using a 2-pin capacitor by cutoff the printed circuit board. The results of parallel patterns of copper stripes were analyzed at different stages and frequency responses analysis in the range of 100 kHz to 4.50 GHz based on a frequency response analysis (FRA), which are experimental results of insertion loss (S21) and return loss (S11). Using a conventional capacitor instead of a 4-pin capacitor of RT2010 type did not show any harmful effects from self-oscillation within the circuit or from the external circuit. The accuracy was verified by simulating the computer program and measuring the test circuit.


S. Deeon, Y. Hirao, K. Tanaka, A Relay Drive Circuit for a Safe Operation Order and its Fail-safe Measures, J. Rel. Eng. Association of Japan. 34(7) (2012) 489 – 500.

S. Deeon, A. Pilikeaw, Anti Self-oscillation of CMOS Invertors ICs for a Fail-safe Relay Drive Circuit, Electrical Engineering Network of Rajamangala University of Technology 2015 Conference, Chonburi, Thailand, 25 – 27 May 2015, 428 – 431.

C. Summatta, W. Khamsen, A. Pilikeaw, S. Deeon, Design and Simulation of Relay Drive Circuit for Safe Operation Order, AIP Conf Proc. 1775(1) 030031.

C. Summatta, S. Deeon, Simple Anti Capacitor Open-Circuit Self-oscillation in a CMOS Schmitt Trigger-invertor Oscillator Circuit, Prz. Elektrotech. 3(23) (2019) 97 – 100.

L. Chruszczyk, J. Rutkowski, Tolerance Maximisation in Fault Diagnosis of Analogue Electronic Circuits, 2011 20th European Conference on Circuit Theory and Design (ECCTD) Linkoping, Sweden. 29 – 31 August 2011, 881 – 884.

D.M. Pozar, Microwave Engineering, fourth ed., John Wiley & Sons, Hoboken, NJ, 2011.

J.S. Hong, M.J. Lancaster, Microstrip Filters for RF / Microwave Applications, John Wiley & Sons, New York, 2004.

J.F. White, High Frequency Technique: An Introduction to RF and Microwave Engineering, first Edition., Wiley-IEEE Press, New York, 2004.

R.T. Hentges, J.D. Pro, M.E. Roen, G.J. VanHecke, G.H. Kimball, Exploring Low loss suspension interconnects for high data rates in hard disk drives, IEEE Trans. Magn. 44(1) (2007) 169 – 174.

J. Obma, N. Angkawisittpan, Crosstalk Reduction in Microwave Microstrip Transmission Line, UBU Eng J. 9(1) (2016) 118 – 130.

S. Mikucionis, V. Urbanavicius, A. Gurskas, A. Krukonis, The Influence of the Air Gap on the Characteristics of the Double-Shielded Microstrip Delay Devices, Prz. Elektrotech. 90(6) (2014) 275 – 279.

S. Sonasang, N. Angkawisittpan, Design of Microstrip Parallel-Coupled Lines with High Directivity using Symmetric-Centered Inductors, Appl. Comput. Electromagn. Soc. J. 36(6) (2021) 657 – 663.




How to Cite

Summatta, C. ., & Sonasang, S. (2022). Safety analysis of 2-pin capacitor as 4-pin capacitor with frequency response. Creative Science, 14(3), 245038.