Study on High Resolution Video Signal Distribution System for Wall-Hanging Displays Based on the Millimeter-Wave Wireless Technology

随着多媒体通信时代的开启，光纤网络中正在建设比特率超过几百Mb/S的高速通信系统。毫米波也因为构建具有如此高比特率的无线通信系统而引起了人们的极大关注。考虑到这一事实，我们开发了一种基于毫米波无线技术的壁挂显示器高分辨率视频信号分发系统。由于毫米波前端在这类系统中起着关键作用，发射机和接收机都是采用我们的NRD导引技术制作的，有望提供高性能的毫米波集成电路。NRD导频收发信机是为60 GHz无线局域网而研制的，具有工作速度超过400 Mbps、体积比名片小等优点。考虑到这一点，基于千兆位的发送器和接收器已经被开发用于…更多IEEE 1394和SDI系统。发射端由输出功率为12dBm的耿氏二极管振荡器、肖特基势垒二极管制作的ASK调制器和环行器组成，接收端由本机输出功率为10dBm的耿氏二极管振荡器和转换损耗为12dBm的平衡混频器组成。NRD导频发射机采用1Gbps时钟对频率为59.75 GHz的毫米波进行调制，并将间隔约5 mm的窄厅内NRD导频接收机接收到的解调波下变频到2.25 GHz的中频。然后放大并检测中频波。用示波器观察到的调制和解调波形形状相同，从而证实了发射信号在接收机中可以清晰地恢复。该发射机和接收机可应用于IEEE1394系统和基于SDI的HDTV信号分配系统中的无线部分。还提出了一种形状简单、性能多功能的新型毫米波天线。该天线具有从宽波束到窄波束方向图变化简单的显著优点。因此，可以在发射机和接收机中分别构建用于基站和信息终端的宽波束和窄波束天线。较少

With the opening of the multi-media communication era, high-speed communication systems with a bit rate of more than several hundreds Mb/s are being built in optical fiber networks. Millimeter-waves have also attracted much attention for the constructions of wireless communication systems having such high bit rate. Having this fact in mind, we have developed a high resolution video signal distribution system for wall-hanging displays based on the millimeter-wave wireless technology. Since millimeter-wave front ends play key role in such systems, the transmitter and receiver have been fabricated by using our NRD guide technology that promises to provide a high-performance millimeter-wave integrated circuits. NRD guide transceiver, fabricated for wireless LAN at 60GHz, has great advantages such as high speed operation beyond 400Mbps as well as small size less than that of the name card. With this in mind, Giga-bit based transmitter and receiver have been developed for applications to the … More IEEE 1394 and SDI systems. The transmitter consists of Gunn diode oscillator with the output power of 12dBm, ASK modulator made by Schottky barrier diode, and circulator, while the receiver consists of local Gunn diode oscillator with the LO power of 10dBm and balanced mixer with the conversion loss of 12dB. Millimeter-wave with the frequency of 59.75GHz is modulated by the 1Gbps clock in the NRD guide ASK transmitter, and the demodulated wave which is received by the NRD guide receiver separated by a distance of about 5mm in a narrow hall is down-converted to the intermediate frequency (IF) of 2.25GHz. And then the IF wave is amplified and detected. The modulating and demodulated wave forms, observed by oscilloscope are identical in shape, thus, it is confirmed that the transmitted signal can be clearly recovered in the receiver. The transmitter and receiver can be applied to wireless portion in IEEE1394 systems and SDI-based HDTV signal distribution systems. New type of millimeter-wave antenna which are simple in shape but multifunctional in performance have been also proposed. The antenna has notable advantage of changeable radiation pattern from wide beam to narrow beam by using simple manner. Thus, the wide beam and narrow beam antennas can be built in the transmitter and receiver for base station use and information terminal use, respectively. Less