The concept of the circuit looks simple enougth to me, two mosfets back to back, when mosfet 1 conducts due to Vgs, mosfet 2 is in reverse polarity so it's internal diode conducts, when you invert the voltage, it's the other way around, mosfet 1 is in reverse polarity so it's internal diode conducts, mosfet 2 conducts because of it's Vgs value.
But when I try to simulate it it does not work, I'm still pretty new to electronics so I'm not quite sure what's going on.
What I notice is that when the voltage source is at -5V the switch does not conduct (and it should), this is because the MOSFET on the left has a Vgs of around 0V so yeah, that's not going to close the circuit.
The publication does advertise at page 2 that "A bidirectional powers witch(BPS)is an active switch which can support bidirectional current flow when it is in the ON condition and bidirectional voltage blocking whenit is turned OFF" and proceeds to show this circuit.
So that leaves me with the question, am I interpreting the paper/tutorial wrong? as I understand this should work according to those sources when the polarity is inverted (that's the whole point), I guess I must have messed up the circuit somehow?
Circuit as showin in the tutorial