An injection-molded case having one or more antenna patterns, the injection-molded case comprising: one or more antenna patterns fabricated by a press process; and an injection-molded case having the antenna patterns provided therewithin, in which the injection molded case is fabricated by fixing the antenna patterns on an injection mold and performing single insert injection molding process; wherein each antenna pattern comprises: one or more first fixing holes formed in the antenna pattern and arranged to fixedly couple with at least one of ribs or fixing protrusions formed on an injection mold; one or more second fixing holes formed at positions adjacent to the first fixing holes in the antenna patterns, in which the one or more second fixing holes are arranged to fixedly couple with ribs or fixing protrusions formed on the injection-molded case after the single insert injection molding process; and one or more third fixing holes formed at positions adjacent to the first and second fixing holes in the antenna patterns, characterized in that the third fixing holes are formed with jaws arranged to receive an injected resin inserted into the jaws during the single insert injection molding process such that the resin rises in and over the jaws of the third fixing holes thereby forming a "T" shape, so as to fix the antenna patterns in place within the injection-molded case. one or more antenna patterns fabricated by a press process; and an injection-molded case having the antenna patterns provided therewithin, in which the injection molded case is fabricated by fixing the antenna patterns on an injection mold and performing single insert injection molding process; wherein each antenna pattern comprises: one or more first fixing holes formed in the antenna pattern and arranged to fixedly couple with at least one of ribs or fixing protrusions formed on an injection mold; one or more second fixing holes formed at positions adjacent to the first fixing holes in the antenna patterns, in which the one or more second fixing holes are arranged to fixedly couple with ribs or fixing protrusions formed on the injection-molded case after the single insert injection molding process; and one or more third fixing holes formed at positions adjacent to the first and second fixing holes in the antenna patterns, characterized in that the third fixing holes are formed with jaws arranged to receive an injected resin inserted into the jaws during the single insert injection molding process such that the resin rises in and over the jaws of the third fixing holes thereby forming a "T" shape, so as to fix the antenna patterns in place within the injection-molded case. one or more first fixing holes formed in the antenna pattern and arranged to fixedly couple with at least one of ribs or fixing protrusions formed on an injection mold; one or more second fixing holes formed at positions adjacent to the first fixing holes in the antenna patterns, in which the one or more second fixing holes are arranged to fixedly couple with ribs or fixing protrusions formed on the injection-molded case after the single insert injection molding process; and one or more third fixing holes formed at positions adjacent to the first and second fixing holes in the antenna patterns, characterized in that the third fixing holes are formed with jaws arranged to receive an injected resin inserted into the jaws during the single insert injection molding process such that the resin rises in and over the jaws of the third fixing holes thereby forming a "T" shape, so as to fix the antenna patterns in place within the injection-molded case.