A Wide-Frequency-Tuning Micro-Loop-Gap Resonator for Miniature Rubidium Vapor-Cell Atomic Frequency Standards

被引:1
作者
Su, Yuanyan [1 ]
Affolderbach, Christoph [2 ]
Pellaton, Matthieu [2 ]
Mileti, Gaetano [2 ]
Skrivervik, Anja K. [1 ]
机构
[1] Ecole Polytech Fed Lausanne, Microwave & Antenna Grp MAG, CH-1015 Lausanne, Switzerland
[2] Univ Neuchatel, Lab Temps Frequence, CH-2000 Neuchatel, Switzerland
关键词
Atomic clock; cavity; equivalent circuit model; loaded cavity; loop-gap resonator; lumped-element model; microwave resonator; printed circuit board (PCB); rubidium (Rb) atomic frequency standard; satellite navigation; TEMPERATURE COEFFICIENT; CAVITY; CLOCK;
D O I
10.1109/TMTT.2023.3276194
中图分类号
TM [电工技术]; TN [电子技术、通信技术];
学科分类号
0808 ; 0809 ;
摘要
To miniaturize the double-resonance (DR) rubidium (Rb) vapor-cell atomic clocks, a new type of micro-loop-gap microwave resonator (mu-LGR) is proposed for TE011-like mode where the magnetic field inside the cavity is homogeneous and oriented along its longitudinal axis over a large volume. It provides more design degrees of freedom by elaborating the printed pattern in the middle layer, while the mechanical strength of the cavity is strong. It also possesses a wider tuning range of the resonances in order to compensate the fabrication tolerances on such miniature precision devices. A theoretical analysis of the general mu-LGR without tuning is presented first, serving as the basic guideline to design the tunable mu-LGR. To demonstrate the wide tuning mechanism, an equivalent circuit model and different tuning schemes are discussed. The measured results show that the proposed tunable mu-LGR can operate at 6.835 GHz by properly adjusting the tuning screw position. Compared to the existing mu-LGRs, this new design can achieve a 40% volume reduction (572 mm(3), approaching the physical limit) and a comparable magnetic field quality, and enlarges the frequency tuning range to 260 MHz (twofold) in measurement. Thus, the proposed compact tunable mu-LGR has a high potential in miniature vapor-cell atomic frequency standards.
引用
收藏
页码:5135 / 5146
页数:12
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