Hello :O)

I have some problems for the past 2 years with wireless networks cause of distance/signal quality issues and i am FED UP.
I saw that there are extension cables and antennas you can buy to increase DBi of wireless networks.
My question is, what is the proffesional name of the CONNECTORS that are connecting the antennas to the router ? Is it RP SMA (male ? female ?)
I am planning to buy some and prepare a home made extension cable to routers antennas to increase communication capabilities of wireless networks.
I have an RG58 connector presser, it can be helpful connecting this connectors ?
Thank you