Abstract: Provided are a device detecting the spatial variation of the complex permittivity and an article presence/absence detection system which are capable of detecting the presence or absence of an article by using a UHF-band RFID tag. A device detecting the spatial variation of the complex permittivity includes an RFID tag, a conductor electrode unit, and a dielectric tag base material. The RFID tag performs communication using an electromagnetic wave in a UHF band. The conductor electrode unit communicates with the RFID tag by using the electromagnetic wave in the UHF band. The dielectric tag base material is provided between the RFID tag and the conductor electrode unit and separates the RFID tag from the electrode unit.

Abstract: One embodiment provides a cooling structure of a battery, including: a battery; an intake port, from which air in an vehicle interior is taken in; and an intake duct, which is in communication with the intake port and from which the air in the vehicle interior is introduced to the battery, wherein the intake duct is connected with a discharge port of an air conditioning duct, which is connected with an air conditioning system, and from which air discharged from the air conditioning system is introduced.

Abstract: Provided are a device detecting the spatial variation of the complex permittivity and an article presence/absence detection system which are capable of detecting the presence or absence of an article by using a UHF-band RFID tag. A device detecting the spatial variation of the complex permittivity includes an RFID tag, a conductor electrode unit, and a dielectric tag base material. The RFID tag performs communication using an electromagnetic wave in a UHF band. The conductor electrode unit communicates with the RFID tag by using the electromagnetic wave in the UHF band. The dielectric tag base material is provided between the RFID tag and the conductor electrode unit and separates the RFID tag from the electrode unit.

Abstract: There are provided an antenna device that comprises: a conductor plate; at least two antenna elements arranged near an end of the conductor plate; a first slotline formed into the conductor plate, the first slotline having a characteristic impedance of an optional numerical value Z1; a second slotline formed into the conductor plate, the second slotline having a characteristic impedance of an optional numerical value Z2 larger than Z1; one end of the first slotline being an open end in an area between the antenna elements within the conductor plate end; the other end of the first slotline connecting with one end of the second slotline; and the other end of the second slotline being short-circuited inside the conductor plate, and wireless terminal apparatus using this.

Abstract: A cooling structure having a sufficient cooling efficiency in cooling an electricity storage device while securing a living space in a vehicle cabin when installed in a compact vehicle having a short distance from a rear seat to the rear end of the vehicle. A battery is contained in an IPU installed in the vehicle. The cooling structure for the battery has an air inlet opened into the vehicle cabin, an air intake duct extending from the air inlet to the IPU and a cover disposed to cover the air inlet and having a hole communicating the air intake duct with the inner side of the vehicle cabin. The air inlet has an opening inclined toward the inner side of the vehicle cabin in one side section of a rear portion of the vehicle cabin near a C-pillar located obliquely posterior to a rear seat.

Abstract: A cooling structure having a sufficient cooling efficiency in cooling an electricity storage device while securing a living space in a vehicle cabin when installed in a compact vehicle having a short distance from a rear seat to the rear end of the vehicle. A battery is contained in an IPU installed in the vehicle. The cooling structure for the battery has an air inlet opened into the vehicle cabin, an air intake duct extending from the air inlet to the IPU and a cover disposed to cover the air inlet and having a hole communicating the air intake duct with the inner side of the vehicle cabin. The air inlet has an opening inclined toward the inner side of the vehicle cabin in one side section of a rear portion of the vehicle cabin near a C-pillar located obliquely posterior to a rear seat.