Inventor

TAKEI KEN

JP74 patents

⚠️ This page may combine multiple inventors who share the name “TAKEI KEN”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.

TAKEI KEN

HITACHI LTD

Wireless handset

RF amplifier with plural combiners

Wireless handset

Tunable slot antenna

TEM slot array antenna

Coaxial resonant slot antenna, a method of manufacturing thereof, and a radio terminal

Multi-carrier RF amplifiers

Tunable slot antenna with capacitively coupled slot island conductor for precise impedance adjustment

Tunable slot antenna with capacitively coupled slot island conductor for precise impedance adjustment

System and method for detecting biological and chemical material

Wireless handset

Traveling wave power combiner and radio base station

System for transmitting/receiving a signal having a carrier frequency band for a radio base station

Small antenna for portable radio phone

Antenna system including a plurality of meander conductors for a portable radio apparatus

Antenna for radio apparatus

Communication terminal, automobile communication terminal, and automobile

Wireless communication method and system using beam direction-variable antenna

Output-controlled power amplifier, radio communication terminal and radio communication base station

Handy-phone with shielded high and low frequency circuits and planar antenna

Wireless handset using a slot antenna

Traveling wave power combiner and radio base station

Antenna, and wireless module, wireless unit and wireless apparatus having the antenna

Wireless communication system

Wireless communication system

High-speed phase-locked loop circuit

Radio apparatus

RFID tag

Small multi-mode antenna and RF module using the same

PLL frequency synthesizer

PLL frequency synthesizer

Antenna, and wireless module, wireless unit and wireless apparatus having the antenna

Transmitter

Rotationally polarized antenna, transmission/reception module, elevator control system, and substation control system

Wireless communication system having a transmission unit that transmits or receives based on a detected timing

HITACHI CABLE

Antenna and method of manufacturing the same, and portable wireless terminal using the same

Antenna and wireless apparatus

Wireless monitoring system and child station therefor

Antenna module, radio device and mobile radio terminal

Leakage loss line type circularly-polarized wave antenna and high-frequency module

Small size thin type antenna, multilayered substrate, high frequency module, and radio terminal mounting them

Circular polarized antenna, antenna design simulator, and wireless module with the antenna

TAKEI KEN

Low/high frequency shared leakage antenna, base station apparatus and close-range detection system using the antenna

Polarization-angle-division diversity wireless transmitter, wireless receiver, and wireless communication system

Frequency variable power transmitter and receiver in Fresnel region and power transmitting system

Wireless transmitter, wireless receiver, wireless communication system, elevator control system, and transformer equipment control system

Control of transmitter peak power and duty ratio in a wireless system to maintain average transmitter power and increase communication range

HITACHI METALS LTD

Antenna element and radio communication apparatus

Antenna, method for manufacturing the antenna, and communication apparatus including the antenna

HITACHI DISPLAYS LTD

Communication system by electrostatic coupling and electromagnetic induction