Tech News: Higher Temperature Operation and 5G Radio Synchronization

  • May 22, 2020

TCXOs are designed to provide a stable frequency despite temperature changes. With typical TCXOs, you can only reach operating temperatures around +85°C, which has long been considered the upper range for industrial applications. Nevertheless, the tight packaging requirements for small cells cause the internal temperatures in system enclosures to exceed industrial norms. Even systems using active cooling — brushless DC fans, for example — to keep temperatures within the specified operating range may face disruptions due to breakdowns. With a lower MTBF compared to the electronic components, cooling fans can malfunction. Because of this risk, using components with a greater maximum temperature range provides allowances in case of a cooling system failure. 

Dynamic Engineers has introduced both the TCXO7502BM and TCXO5302BM temperature-compensated crystal oscillators (TCXO), which provide high stability and dynamic performance up to +105°C operating temperatures. The TCXO7502BM and TCXO5302BM are designed for IEEE 1588-based synchronization in 5G and LTE-Advanced mobile networks, which support smaller, more densely integrated radios for mounting on lamp posts, traffic lights, telephone poles, and the sides of buildings, where the radio has limited heat sinking and will run hotter. Without higher temperature components, radio performance can degrade, including a loss of synchronization. Synchronization enables networks to maintain service quality and operating reliability, and the use of eCPRI and distributed architectures in the latest generation of 4G and 5G networks increases the timing complexity for synchronization. 

Dynamic Engineers TCXO7502BM and TCXO5302BM TCXOs are available with an extended -40°C to +105°C operating temperature range, ensuring better stability and vigorous performance under harsh environments due to temperature changes, vibration, mechanical shock, power supply noise, limited air flow, and electromagnetic interference.

For additional information regarding 5G synchronization or other RF / microwave topics, please contact your local Dynamic Engineers sales representative or