Cost-effective 60-GHz modules with the local-oscillator having the temperature-coefficient of 0 ppm/°C for "Digital@Home"-systems

Cost-effective 60 GHz modules were developed for "Digital@Home"-systems which needed the bit rate of several Gbps. The module have the lowest cost local-oscillators which is composed of only two component, a negative-resistance MMIC and ∼3/4λg microstrip planar resonator. The temperature coefficient of the local oscillation frequency was 0 ppm/°C in the range of 20-40°C, and the maximum deviation was 420 ppm at 80°C. The module package is made of plastic materials and the size is 26 × 20 × 4.5 mm³. A patch antenna with the gain of 5, 10, or 13 dBi is printed on the backside of the package. The typical output power of the transmitter module Tx was 8 dBm, and the noise-figure of the receiver module Rx was less than 9 dB. The combination of Tx and Rx modules with the antenna gain of 13 dBi enable us to transmit the video signals with the bandwidth of 2.5 GHz and the C/N of 17 dB at the distance between the transmitter and the receiver D = 10 m in the "Digital@Home"-systems.