The Oxford English Dictionary answers the first clearly enough: incent is "apparently a backformation".
《牛津英语词典》非常明确地回答了前一问题。 :Incent“明显是一个逆成词”。
3
Some technological problems such as precision of antenna ca-liber, one-side welding with backformation, etc. were solved. EBW procedure of pyramidal horn antenna was applied successfully.