TestConX China 2020 Khaled Elmadbouly: RF Simulation Technique for high speed test socket

Описание: TestConX China 2020 - https://www.testconx.org/
"RF Simulation Technique for high speed test socket"
Khaled Elmadbouly - Smiths Interconnect
Kevin DeFord - Smiths Interconnect
Robert Friedt - Smiths Interconnect
recorded October 29, 2020

The rise of Internet of Things, 5G, artificial intelligence, autonomous cars, Deep Learning, self-driving vehicles have increased consumer demand for products requiring higher speed digital and analog Integrated Circuits (ICs), therefore, the demand for designing high performance test sockets must keep pace.

In this paper, we will discuss the challenge of RF simulation and will focus on a new Enhanced Simulation Technique that can improve the accuracy of simulation, validation methods with advanced measurement to show correlation study between simulation and actual measurement.

In Signal Integrity simulation, HFSS software is commonly used especially for high frequency. As Data rates and Bandwidth continue to increase, a paradigm shift is emerging in the industry which is driving socket suppliers to provide more detailed simulations to include the Device Package and PCB interfaces in the analysis. It is critical that the socket impedance is matched as closely to the PCB impedance for maximum performance.

VNA measurement verification. A Vector Network Analyzer play a key role to achieve correlation between simulations and measurement, The VNA measures the amount of energy transmitted through the DUT and reflected by the DUT at different frequencies. It then provides these results in scattering-parameter (S-parameter) of the entire test setup. The test socket is then de-embedded and gated to try and provide basic performance data, such as the -1 dB Insertion Loss (IL), -10 dB Return Loss (RL), Loop Inductance (L), Mutual Capacitance (Cm) IL, without the effects of test fixtures and PCB.

In conclusion, SI simulations using HFSS become critical in developing new high-speed test sockets. Extensive simulation can reduce development time. More importantly, optimized simulation methodology by including package and test board structures can generate more accurate or reliable simulation results