小型化2.49 ghz低相位噪声温度稳定SAW振荡器

0 ENGINEERING, ELECTRICAL & ELECTRONIC

IEEE microwave and wireless technology letters Pub Date : 2025-03-18 DOI:10.1109/LMWT.2025.3546238

Tangfei Kang;Haoshen Zhu;Jiajian Liang;Bin Jia;Wenquan Che;Quan Xue

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引用次数: 0

摘要

在这封信中，使用温度补偿表面声波（TC-SAW）谐振器实现了2.49 ghz温度稳定振荡器。采用交叉耦合拓扑结构抑制电源变化，增强输出摆幅。采用带温度补偿层的TC-SAW来提高振荡器的温度稳定性。测量结果表明，该振荡器的相位噪声为145 dBc/Hz@1 MHz偏置，品质因数（FoM）为215 dB。在1 V的电源电压下，振荡器消耗0.6 mW的直流功率。在$- 40~^{\circ}$ C至$85~^{\circ}$ C的温度范围内，振荡器的频率漂移小于248 ppm，在$- 40~^{\circ}$ C至$65~^{\circ}$ C的温度范围内，振荡器的频率漂移小于90 ppm。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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A Miniaturized 2.49-GHz Low-Phase-Noise Temperature-Stable SAW Oscillator

In this letter, a 2.49-GHz temperature-stable oscillator is implemented using a temperature-compensated surface acoustic wave (TC-SAW) resonator. The cross-coupled topology is adopted to suppress power supply variations and enhance output swing. The TC-SAW with a temperature-compensated layer is used to improve the temperature stability of the oscillator. Measurement results show that the oscillator achieves a phase noise of 145 dBc/Hz@1 MHz offset with a figure of merit (FoM) of 215 dB. The oscillator consumes a dc power of 0.6 mW under a supply voltage of 1 V. Over a temperature range of

$- 40~^{\circ }$

C to

$85~^{\circ }$

C, the oscillator’s frequency drift is less than 248 ppm and within 90 ppm over a range of

$- 40~^{\circ }$

C to

$65~^{\circ }$

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