研制了采用蓝宝石加载微波腔的蓝宝石主动型氢原子频标,腔体外径18 cm,高度20 cm,重量约2.5kg.由于微波腔体积的减小,整钟体积较传统大氢钟明显减小.经中国计量科学研究院测试,该蓝宝石主动型氢原子频标的技术指标为3.0 × 10-13@1 s、3.8 ×10-15@1 d,是目前国内体积最小的高指标、高可靠主动型氢原子频标,可在实验室、车载等环境下使用.%A compact active hydrogen maser is described.It uses the active mode of operation, cavity which is dielectrically loaded by the sapphire. The cavity is 18 cm outside diameter and 20 cm high, and weighs only 2. 5 kg. Based on the sapphire-loaded cavity design, the volume of the total hydrogen maser has been reduced remarkably. The most recent stability data from the compact hydrogen masers is presented, which was measured by National Institutive of Metrology (3. 0 × 10-13 @ 1 s,3. 8 × 10-15@ 1 day). The compact hydrogen maser can be used for portable application.
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