Saisi Ultra-Low Noise & High Second Stability OCXO

If a CPU is the "super brain" governing the digital circuits of electronic products, crystal oscillators act like the heart sustaining steady blood circulation. They not only supply stable clock signals to the CPU, but also regulate the operating rhythm of circuits with precise frequencies to ensure orderly operation of all circuit modules. Without the precise tuning of crystal oscillators, the entire system will lose synchronization, resulting in data loss or processing errors. Therefore, selecting a suitable crystal oscillator is critical to optimizing circuit design and improving product performance and reliability.

Driven by the vigorous development of key sectors including 5G communications, radar electronic countermeasures, satellite navigation and precision instruments, the market demands for crystal oscillators are evolving toward ultra-low phase noise, high stability, low power consumption, miniaturization and higher operating frequencies. Against this backdrop, the Oven Controlled Crystal Oscillator (OCXO) has emerged. As the most high-precision frequency source solution based on quartz oscillators available today, OCXO features low phase noise and compact size, making it the preferred premium frequency source for high-demand digital circuits.

1. Booming Demands Across 5G, Radar, Instrumentation & More: Low Phase Noise OCXOs Become Highly Sought-After

Fueled by the robust growth of 5G communications, radar electronic countermeasures, satellite navigation, precision instruments and other industries, the market demand for crystal oscillators remains strong. Statistics and forecasts show that the global crystal oscillator market reached a sales volume of 34.77 billion RMB in 2023, and is projected to hit 50.912 billion RMB by 2030, representing a compound annual growth rate (CAGR) of 5.7% from 2024 to 2030. The global crystal oscillator market boasts enormous potential.

As a core indicator for evaluating signal sources, phase noise plays a decisive role in communications, radar, satellite navigation, precision measurement and other fields. Reducing phase noise helps minimize signal interference and improve overall system signal quality and reliability.

Communications: In high-frequency, high-data-rate 5G/6G wireless communication systems, phase noise can cause severe signal distortion, data transmission errors and timing deviation, undermining communication reliability and efficiency.

Satellite Navigation: Satellite navigation systems such as GPS and BeiDou rely heavily on accurate RF signal transmission and reception. Oscillators with low phase noise deliver more stable carrier signals, which directly determines positioning accuracy and navigation stability.

Precision Instruments: As signal generators, testing instruments require higher precision than the signals under test — a rigid performance benchmark. Excellent phase noise performance is fundamental to superior testing capability.

Radar & Electronic Countermeasures: Radars transmit pulses at specific frequencies and analyze frequency shifts of reflected pulses. Excessive phase noise degrades Doppler shift data. Poor local oscillator (LO) phase noise will submerge weak target echoes in the sidebands of strong reflected signals, leading to detection failures and errors in measuring target distance, speed and direction.

This explains why OCXOs, as high-precision frequency sources with outstanding low phase noise performance, are widely favored in applications with stringent phase noise requirements.

2. Saisi Ultra-Low Noise & High Second Stability Solution

To meet market demands for low phase noise OCXOs, Saisi has independently developed ultra-low noise and high second stability OCXO solutions available for mass production. Our products deliver superior second stability, with temperature stability better than 0.5 ppb across the temperature range of -40℃ to 85℃.

Beyond standard OCXOs, we also develop customized clock products including phase-locked oscillators, disciplined oscillators and multi-output oscillators, gradually building a comprehensive clock signal chain ecosystem. We deliver tailored industry clock solutions featuring low phase noise, high stability, low power consumption, miniaturization and high frequency for customers across diverse sectors.

3. Conclusion

Driven by the advancement of intelligent technologies, time and frequency applications are expanding into broader and deeper fields. Saisi has focused on the time & frequency industry for over a decade and keeps forging ahead.

We started with high-performance clock system products to achieve breakthroughs in segmented industries. Then we expanded our product portfolio to cover timing modules, time & frequency testing instruments and integrated network management platforms, enriching our full lineup of time & frequency products. Looking ahead, we have made forward-looking layouts in core electronic components, innovatively developing clock chips (clock buffers, clock generators, clock SoCs), subscriber line interface circuit (SLIC) chips, crystal devices (OCXO, TCXO, SPXO, crystal resonators) and atomic clocks (rubidium clocks, CPT clocks, chip-scale atomic clocks).