Stargates didn't originate with the movie, show, and spin-off containing that name. It's a legitimate sci-fi concept used in lots of games and shows. Don't judge me.
About this creation
Following the discovery of jump pads , the Shogunate sought to use this technology for military applications. However, the device itself does not lend itself to such. The transfer of material over the fields of each jump pad made it excellent for trade, by this could allow enemies to come through. It can only send one soldier through at a time, and it is way too small to send fighters through. A bigger device would be needed.
The attempt to create a bigger version of the jump pad was one of the most embarrassing incidents in Shogunate history. Any pictures of this monstrousity are, by law, required to be destroy by anyone who is unlucky enough to come across such hideousness. It was almost impossible to make the eight equidistant parts of the disintigrator/reintegrator array on a bigger scale that could properly fit on a horizontal plane. Soldier squads had to bunch to together really tightly to be able to fit all of them and their gear. It was even worse for ships. They would need to be very compact to fit into the transfer field. Attempts to place the vessels vertically on the pads were disaterous. Something a bit different would be required.
It was theorized that far more things could be sent through if the jump pad was placed on its side. Plus, fighters could fly toward it instead of having to hover over the thing. Some said that this could cause the ship to crash if the device malfunctioned. Also, parts of a ship could crash into something that was being transfered at the same time.
Soon after this dicussion began, a discovery was made on the nature of the instant transfer system. Researchers found that alot of complicated hardware under the pad was used for calculating the instant transfer, while the wormhole generator complex was contained in eight parts that where just below the d/r array. Scaling these parts, an open ring perpendicular to the ground could allow one-way transfer from the device that initiated to wormhole to the device that it was sending things to. Without the instant transfer hadware, the device only transported matter that was in the middle of the ring. Special hardware was placed in the d/r array to control what would be sent and what would not. when solid matter is near the center, there is a gravational pull exerted on it so that if the control of the thing has already gone through, the rest of it will be pulled in after it. As this device didn't have a pad, and matter no longer "jumped" through it, a new name was needed. It was like a gateway to the heavens, and, therefore, it would be known as a stargate.
Now, you may say, "that is so unrealistic. How can a civilization create a stargate by reverse-engineering another ancient device?" Remember, my friends, they are Japanese. We begin at the back, where we can see the wormhole generators. Those black, bulgy things.
On the sides, we can clearly see, uh, trans-orange grills, which have no known purpose. Just there to get some trans-orange in the moc.
The d/r array can be seen from the front. For some reason, some of the things are blue. It's a Blue Shogunate moc; you gotta have some blue in there, people.
A close-up of a wormhole generator an d/r array part.
Here we see the Shogun (left) in front of the stargate. A samurai, (right) in full dress uniform, bears a flag. Not the flag of the Blue Shogunate, just a flag. We have no idea where he got it.