August 5, 2017

    The dog days of summer are upon us. For most of the northern hemisphere, air conditioning and ice cream cravings are on full blast. Even微波杂志编辑Pat Hindle和Gary Lerude正在寻找在年度海滩版中冷却的方法频率很重要

    Heat is a challenge for RF devices too. What do you call an RF signal at high temperature?

    热浪。(groan)

    除了笑话,热管理是一项大问题。“获得散热”可确保RF系统在更长的寿命上可靠地运行。不幸的是,保持在检查中的温度并不像接受你的功率放大器或者bulk acoustic wave (BAW) filter游泳。

    Temperature is a shared concern for the连接的车and phased array radar. Yes, they do share something. Here’s why these applications get hot, and what you can do about it.

    用斜角和甘盖保持凉爽

    连接的汽车依赖于裸滤器避免相邻频带之间的干扰。这些过滤器通常位于鲨鱼鳍安装在汽车的屋顶上, where they’re subjected to high heat and intense temperature variations.

    Filter frequency response — how a filter interacts with signals to allow some and block others — tends to drift over temperature. This is problematic when trying to avoid interference between closely spaced frequency bands. While drifting seems like an efficient way to create smoke and increase tire wear, filter drift can turn your favorite satellite radio channel into white noise.

    Temperature compensated filters provide the solution. These先进的过滤技术, like Qorvo’sLowdrift™和Nodrive™BAW,在热量和变化方面更稳定,使司机锁定在他们最喜欢的曲调和谈话广播电台上。

    Thermal management is also important in high power RF systems like相控阵雷达。By nature, these applications generate more heat. The key is keeping temperatures low enough for reliable operation.

    我们这样做GaN, a semiconductor technology that can handle the heat of power-hungry RF systems. With superior thermal characteristics, GaN can operate reliably at higher temperatures than competing technologies, like GaAs or silicon.

    我们说超过200°C,我可能看起来很酷f you’re visiting Mercury — but that’s twice as hot as boiling water on Mother Earth.

    Specifically,Gan-On-SiC具有优异的热性能,可在较高温度下操作,同时保持系统足够冷却以正常工作 - 并且在温度和寿命之间存在直接关系。与GaN建造的下一个Gen雷达系统可以比传统技术更长的七大年度可靠地运行。

    那么,我们可以处理热量吗?

    Yes, we GaN!(groan)

    本文首先出现在布伦特的沉思微波杂志

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    Brent Dietz.

    About the Author

    Brent Dietz.
    Director of Corporate Communications

    在技​​术产业30多年,布伦特在30年内看到了很多工程技术。他的主要作用是使极客对非极客,记者和非技术分析师造成的。这是挑战 - 在不扭曲的情况下简化 - 它有助于有一种幽默感。Brent确实,他不时与读者共享。