Fujitsu Corporation

Takumi Itoh

Hiroki Hayashi

Yasuhiro Nakasha

A radio communication apparatus for generating a pulse signal corresponding to a data signal, amplifying the generated pulse signal, and transmitting the amplified pulse signal as a radio signal, the apparatus including: a reference pulse signal generation unit which generates a reference pulse signal of opposite phase to the pulse signal and amplifies the reference pulse signal; and a combining unit which combines the amplified pulse signal and the amplified reference pulse signal, wherein a combined pulse signal output from the combining unit is transmitted as the radio signal.

Radio communication apparatus and pulse signal transmission method in radio communication apparatus

A communication apparatus includes: a pulse generation unit configured to alternately generate a positive pulse and a negative pulse indicating presence or absence of a pulse in accordance with a value of a data signal; a band-pass filter configured to filter the pulse generated by the pulse generator; and a transmission amplifier configured to amplify a signal filtered by the band-pass filter, and to output the signal as a transmission signal.

Communication apparatus

A communication device includes: a converting part converting a data signal from a non-return-to-zero signal to a return-to-zero signal; a trigger flip-flop inverting an output signal every time the return-to-zero signal changes in one cycle; a first filter outputting a positive pulse and a negative pulse alternately, which indicate existence and absence of the pulse corresponding to a value of the data signal, by removing a low frequency component of an output signal of the trigger flip-flop.

Pulse converting and shaping communication device

A multilayer printed-circuit board includes at least one inner-layer signal line, first and second ground layers between which the inner-layer signal line is sandwiched via a frame member made of an insulating material in a thickness direction of the multilayer printed-circuit board, and metallic wall members which are provided on inner walls of slits formed in the frame member and extending along the inner-layer signal line. The first and second ground layers and the metallic wall members shielding the inner-layer signal line.

Growing community of inventors

Sakura, Japan

Takumi Itoh