Microwave power transfer is expected to support
various applications. However, there are strict regulations for
radio emissions and leakage levels. We attempt to avoid the
regulation and transmission loss in free space by employing a
waveguide method for microwave power transfer. We
experimentally investigated the frequency-division multiple
access techniques as a method of microwave power and
communication transmission. Results indicated that the
communication quality did not deteriorate for a carrier
frequency distance of 7-8 MHz between the microwave power
carrier and each modulated signal. The experimental prototype
of the microwave power transfer system comprising a batteryless
and powerless ZigBee communication unit confirmed continuous
operation and use ofthe waveguide wireless system.