Influence of the SMA connector and its modeling on electromagnetic simulation

Abstract

The modeling of subminiature version A (SMA) connectors is occasionally neglected when simulating microwave components or when an approximated model is used to represent its characteristics. In this article, SMA connector modeling is investigated and an appropriate simulation modeling is discussed. It was observed that modeling the inner part of the SMA connector using the coaxial cable model is adequate when no electromagnetic field exist outside of the SMA connector. However, modeling the exterior structure including a receptacle, if it exists, is required when an electromagnetic field exist outside the connector. © 2015 Wiley Periodicals, Inc. Microwave Opt Technol Lett 57:2168–2171, 2015

Substrate integrated waveguide slot antenna with shorting vias for broadband applications

“…However, SMA connector is modeled as a lumped port (50 Ω) from the ground plane to the top plane in simulation. This is used as an excitation element as the simulated and measured amplitudes in the presence and the absence of SMA connector are close to each other, when there is no electromagnetic field on the outer face of SMA connector and it also reduces computational time while simulation. The simulated 10 dB impedance bandwidth of full mode loaded SIW is 21% from 10.2 to 12.6 GHz and the simulated results matches with the measured results which is fabricated perfectly using PCB technology.…”

A CPW-Fed Structure Shaped Substrate Wideband Microstrip Antenna for Wireless Applications

“…The small difference between measured and simulated result is due to the effect of SMA (sub miniature version A) connector soldering and fabrication tolerance. This small difference is also due to the impingement of the electromagnetic wave radiated from the antenna on the receptacle and the outer conductor of the connector [20].…”

“…[20]. The outer structure and receptacle of the SMA connector are modeled because the electromagnetic field affects them.…”

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“…The difference of electric field distribution between two models (w/o cable and w/ cable) is significant at 2.45 GHz while it is not significant at 5.5 GHz. Therefore the modeling of the cable connector, not only the SMA connector [6], is important at 2.45 GHz due to strong perturbation of the field. The measured −10 dB relative bandwidths of the reflection coefficient were 4.7% at 2.45 GHz (2.5 GHz to 2.62 GHz), and 9% at 5.5 GHz (5.28 GHz to 5.78 GHz).…”

“…The inner and outer conductors are connected to the upper and lower conductor layers of the FR-4 substrate, respectively. Both the SMA connector and the FR-4 substrate material properties are modeled (for simulation purposes) as in [6]. …”