The principles of frequency mixing technique and its application to detect PD signals at ultrahighfrequency (UHF) are introduced in this paper.
介绍了混频技术的原理及其在超高频局部放电信号提取中的应用。
2
In terms of operation frequency, RFID systems can be divided into four categories: low frequency (LF), highfrequency (HF), ultrahighfrequency (UHF), and microwave.
根据工作频率来分,RFID系统可以分为低频,高频,超高频和微波四个波段。
3
MUOS will augment and replace the legacy UltraHighFrequency (UHF) Follow-On system (UFO) providing assured communications, including simultaneous voice, video and data, for mobile warfighters.