
(电磁超材料)
一块普通的化工材料聚四氟乙烯板,上面覆盖着一层铜箔,铜箔被蚀刻成不同的图案。这块普通的材料就变成了超材料,在5G新基建中大显身手。这种超材料的研发者,西安电子科技大学副教授、博士生导师赵鲁豫最近很忙。
去年11月,赵鲁豫在西咸新区沣东新城注册成立了西安朗普达通信科技有限公司(以下简称朗普达公司)。
今年2月,疫情尚在爆发期,赵鲁豫的团队就与台湾的集成电路加工商合作,将他们设计的5G手机信号去耦合芯片量产。
今年4月,疫情刚有好转,他们又与深圳一家企业合作,将他们设计的超材料5G天线设备生产出来销往国外。
“随着5G技术的推广和5G新基建的大力实施,我们研发数年的多天线技术和天线去耦合技术有了用武之地。”赵鲁豫在接待来客时说。
5G时代,传输速率之所以这么快,天线的作用至关重要。

(系统误差校准)
在朗普达公司的工作台上,一个5G基站天线正在等待检测。120多个天线阵子整齐地排列在板子上,上面覆盖一层刻有十字图案的超材料。

(天线阵子)
原来,天线阵子如果距离过近,各自传输的信号就会形成干扰。普通的4G基站天线上排布着最多40个天线阵子,而5G基站天线则要排布128个至192个天线阵子,后续随着技术发展,基站天线阵子的数目还会进一步增加至上千个。如何在同样面积里,容纳更多的天线阵子,减少天线阵子之间的信号干扰就成为工程师们头疼的问题。而这正是赵鲁豫的研究强项。

(检查天线阵子)
2009年,赵鲁豫在香港中文大学攻读博士期间,就开始研究天线之间的信号干扰问题。赵鲁豫研究团队所研发的超材料,就是一种人工电磁材料,超材料上的图案可以产生一种电磁场环境,相当于让两个天线之间的距离等效变长,从而减少天线间的信号干扰。
“超材料的应用,可以将原来天线产品的尺寸缩小至少30%,且核心性能不发生退化,实现天线物理面积大幅度缩减。”赵鲁豫介绍,“这就类似于给两个靠得很近的人,穿上隔音服,防止两个人说话相互干扰。我们就是用这种超材料,给天线穿上了件‘隔音服’。”
经过4次迭代,超材料终于从一个设计方案变成产品。如今这项技术的研发和应用已经走到国际前列,正在申请1项国际专利、5项发明专利。

(满足多天线系统通信标准的去耦芯片)
“手机越来越小,而手机内的天线越来越多。经过在大学里7年的研发,我们的手机去耦合芯片已经能应用于手机,解决手机天线信号干扰问题。”赵鲁豫说。他手中拿着的芯片只有3平方毫米大小,而他们能做到的最小去耦合芯片只有0.5平方毫米大小,如同一颗小米粒,非常适合应用于5G手机。
面对5G技术的发展浪潮,多年的技术积累迎来了转化应用的机遇期。
在西安电子科技大学的支持下,赵鲁豫与他的创业伙伴一起在沣东新城成立朗普达公司,对相关技术进行产品转化。为了加速企业成长,沣东新城为企业提供了良好的创业办公环境,及时推送各类政策资讯,争取各类扶持资金,帮助企业申请高新技术企业认证。
“到2023年,国内5G基站天线建设的市场规模将超过500亿元,我们希望公司能够快速发展,在其中有所作为。”赵鲁豫说。
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