Abstract: A extension case adaptable onto a mobile terminal device to enable extended functions, includes a sheath, an electrical connector, a battery, and a radio frequency identification (RFID) antenna. The sheath is configured to shieldingly receive the mobile terminal device and comprises a covering portion and a buckling portion curvedly extended from an outer edge of the covering portion. The electrical connector is arranged on the buckling portion of the sheath for establishing electrical connection with the mobile terminal device. The battery is disposed on the covering portion and is accessible to the mobile terminal device through the electrical connector. The RFID antenna is electrically connected to the electrical connector and embeddedly disposed in the covering portion adjacent to the battery in a non-overlapping manner.

Abstract: A extension case adaptable onto a mobile terminal device to enable extended functions, includes a sheath, an electrical connector, a battery, and a radio frequency identification (RFID) antenna. The sheath is configured to shieldingly receive the mobile terminal device and comprises a covering portion and a buckling portion curvedly extended from an outer edge of the covering portion. The electrical connector is arranged on the buckling portion of the sheath for establishing electrical connection with the mobile terminal device. The battery is disposed on the covering portion and is accessible to the mobile terminal device through the electrical connector. The RFID antenna is electrically connected to the electrical connector and embeddedly disposed in the covering portion adjacent to the battery in a non-overlapping manner.

Abstract: An antenna module capable includes a substrate unit and an antenna unit. The substrate unit includes at least one carrier substrate having a dielectric constant substantially between 7 and 13. The carrier substrate includes a dielectric body and a plurality of nano-scale microparticle structures distributed inside the dielectric body, and each nano-scale microparticle structure includes at least one nano-scale carbon particle and a nano-scale insulating encapsulation layer for totally encapsulating the nano-scale carbon particle. The antenna unit includes at least one antenna track disposed on the carrier substrate. The antenna track has an antenna usage volume that is adjustable within a predetermined volume range according to the VSWR value and the antenna efficiency maintained within a first and a second predetermined ranges, and the antenna track has at least one feeding portion and at least one grounding portion.