Abstract: A case body of a fan case in a jet engine is formed by use of a composite material of carbon fiber reinforced plastic. Metal rings are respectively attached to a leading edge and a trailing edge of the case body. The metal rings are electrically connected together by a conductive cable. Both of the metal rings and the conductive cable constitute a path of a lightning current.

Abstract: A control system includes a vehicular device equipped to a vehicle and a portable device carried by a user. The vehicular device transmits, at a first transmission time interval, an RF signal in synchronization with an RF clock signal after a transmission of an LF signal. The portable device counts a reception time interval of the RF signal and determines, based on the reception time interval, a second transmission time interval of a response signal, and transmits the response signal at the second transmission time interval. The vehicular device further determines whether a duration time from transmission of the LF signal or the RF signal to reception of the response signal is within an appropriate range set based on the RF clock signal, and permits a predetermined manipulation to the vehicle when the duration time is within the appropriate range.

Abstract: A case body of a fan case in a jet engine is formed by use of a composite material of carbon fiber reinforced plastic. Metal rings are respectively attached to a leading edge and a trailing edge of the case body. The metal rings are electrically connected together by a conductive cable. Both of the metal rings and the conductive cable constitute a path of a lightning current.

Abstract: A control system includes a vehicular device equipped to a vehicle and a portable device carried by a user. The vehicular device transmits, at a first transmission time interval, an RF signal in synchronization with an RF clock signal after a transmission of an LF signal. The portable device counts a reception time interval of the RF signal and determines, based on the reception time interval, a second transmission time interval of a response signal, and transmits the response signal at the second transmission time interval. The vehicular device further determines whether a duration time from transmission of the LF signal or the RF signal to reception of the response signal is within an appropriate range set based on the RF clock signal, and permits a predetermined manipulation to the vehicle when the duration time is within the appropriate range.

Abstract: A branching filter has a group of terminals including an antenna terminal, a transmission signal terminal, reception signal terminals, and a ground terminal; a transmitting filter located between the antenna terminal and the transmission signal terminal; a second filter located between the antenna terminal and the reception signal terminals and; a first connection line connecting the parallel resonators and the ground terminal; a second connection line connecting the receiving filter and the ground terminal; and a third connection line which connects the first connection line and the second connection line and which is electromagnetically coupled with at least one of the resonators and lines configuring the transmitting filter.

Abstract: A duplexer has an antenna terminal, a first terminal, and second terminals and provided with a first filter arranged between the antenna terminal and first terminal and including a parallel resonator for forming a ladder type filter circuit, a second filter arranged between the antenna terminal and the second terminal and having a passband higher than a passband of the first filter, and an electromagnetic coupling element arranged between the parallel resonator of the first filter and a ground part and electromagnetically coupled with the antenna terminal.

Abstract: A branching filter has a group of terminals including an antenna terminal, a transmission signal terminal, reception signal terminals and, and a ground terminal; a transmitting filter located between the antenna terminal and the transmission signal terminal; a second filter located between the antenna terminal and the reception signal terminals and; a first connection line connecting the parallel resonators and the ground terminal; a second connection line connecting the receiving filter and the ground terminal; and a third connection line which connects the first connection line and the second connection line and which is electromagnetically coupled with at least one of the resonators and lines configuring the transmitting filter.

Abstract: [Problem] To provide a duplexer able to improve the isolation characteristic and the attenuation characteristic and a communication device using the same. [Solution] A configuration having an antenna terminal 4, a first terminal 1, and second terminals 2, 3 and provided with a first filter 5 arranged between the antenna terminal 4 and first terminal 1 and including a parallel resonator for forming a ladder type filter circuit, a second filter 6 arranged between the antenna terminal 4 and the second terminal 2 and having a passband higher than a passband of the first filter 5, and an electromagnetic coupling element 8 arranged between the parallel resonator of the first filter 5 and a ground part G and electromagnetically coupled with the antenna terminal 4.

Abstract: A rewriting tool for rewriting a content of a nonvolatile memory including vehicle information and the like provides a supplemental authentication process that detects a wireless authentication medium associated to an authorized rewriting tool user by wireless polling on an unconditional basis besides authenticating the authorized rewriting tool user based on an input from the rewriting tool for the purpose of an improved security.