| 单词 | ultra wideband | 
| 释义 | > as lemmasultra wideband   ultra wideband  n.  Brit. , U.S. (also ultra wide band)	 Electronics and Telecommunications a very broad bandwidth; (in later use) spec. a radio communications technology which uses the transmission of very narrow and low-energy pulses over a broad bandwidth to achieve high communication speeds; frequently attributive. ΚΠ 1943    Indian Jrnl. Physics 17 		(title)	 167  				On the theory of performance of wide and ultra-wide band lattice type crystal band-pass filters containing stabilised negative impedance elements. 1989    Aviation Week & Space Technol. 4 Dec. 38  				Rapid advances in ultra-wideband radar technology, while increasing the potential for detecting and imaging extremely small cross-section targets, have created a bitter controversy between the stealth community and proponents of new radar concepts. 2002    Wall St. Jrnl. 18 Nov.  b4/6  				An entirely new communications technology, dubbed Ultra Wideband, that could be used for short-range communications by many consumer products, in addition to computing devices. 2005    Glasgow Herald 		(Nexis)	 26 Aug. 32  				[It] specialises in ultra-wideband systems that transfer large amounts of data over short distances wirelessly and without interference from other signals. < as lemmas | 
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