Aries 0.4 mm Socket Test and Model Results Gert Hohenwarter 4/21/2014 6200 Gisholt Dr. Ste. 205 MADISON,WI 53713 USA 608-224-1250 [email protected] 1 Objective • Test socket • Return loss (S11) • Insertion loss • Impedance 6200 Gisholt Dr. Ste. 205 MADISON,WI 53713 USA 608-224-1250 [email protected] 2 Setup • • • • Agilent HP8722C VNA option 10 50 MHz-40.05 GHz Effective risetime ~ 25 ps Custom probes •ANSYS HFSS 3D field modeler 6200 Gisholt Dr. Ste. 205 MADISON,WI 53713 USA 608-224-1250 [email protected] 3 Return loss S11 measured Return loss from PCB side 6200 Gisholt Dr. Ste. 205 MADISON,WI 53713 USA 608-224-1250 [email protected] 4 Return loss S22 measured Return loss from DUT side 6200 Gisholt Dr. Ste. 205 MADISON,WI 53713 USA 608-224-1250 [email protected] 5 Insertion loss S21 measured Insertion loss from PCB to DUT side 6200 Gisholt Dr. Ste. 205 MADISON,WI 53713 USA 608-224-1250 [email protected] 6 Impedance measured Ohms TDR from PCB toward DUT side 6200 Gisholt Dr. Ste. 205 MADISON,WI 53713 USA ns 608-224-1250 [email protected] 7 HFSS model 3x4 array for 3D model 6200 Gisholt Dr. Ste. 205 MADISON,WI 53713 USA 608-224-1250 [email protected] 8 Return loss S11 Return loss from PCB side – ‘M’ = model 6200 Gisholt Dr. Ste. 205 MADISON,WI 53713 USA 608-224-1250 [email protected] 9 Return loss S22 Return loss from DUT side– ‘M’ = model 6200 Gisholt Dr. Ste. 205 MADISON,WI 53713 USA 608-224-1250 [email protected] 10 Insertion loss S21 Insertion loss from PCB to DUT side – ‘M’ = model 6200 Gisholt Dr. Ste. 205 MADISON,WI 53713 USA 608-224-1250 [email protected] 11 Impedance TDR from PCB toward DUT side ‘M’ = model (risetime is faster than measurement and will lead to higher peaks) 6200 Gisholt Dr. Ste. 205 MADISON,WI 53713 USA 608-224-1250 [email protected] 12 Summary • Return loss performance is best for the edge case since impedance is closest to 50 Ohms in that configuration • There is reasonable agreement between model and measurement up to about 10 GHz. • It appears a few coils never close completely. This introduces some uncertainty in the model as their number is not known. 6200 Gisholt Dr. Ste. 205 MADISON,WI 53713 USA 608-224-1250 [email protected] 13