CN110571522A - 宽频毫米波天线罩及其制备方法 - Google Patents
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Abstract
本发明公开了一种宽频毫米波天线罩及其制备方法,属于天线罩技术领域。所述天线罩为C型夹层结构,自上而下分别为石英纤维增强氰酸酯树脂、PMI泡沫、石英纤维增强氰酸酯树脂、PMI泡沫、石英纤维增强氰酸酯树脂。本发明用石英纤维增强氰酸酯树脂与PMI泡沫制备的C型夹层结构的天线罩在27~40GHz Ka波段下的面板透波率不小于95%,在80~100GHz W波段下的面板透波率不小于90%。
Description
技术领域
本发明属于天线罩技术领域,具体涉及一种宽频毫米波天线罩及其制备方法。
背景技术
现代雷达技术已由早期探测、火控、气象和导航功能,进一步发展出电子侦察、敌我识别、电子干扰和精确制导等功能。天线罩工作频率也由单频发展为宽频,直至多波段全频带。
毫米波一般是指电磁波谱中频率为30~300GHz这一部分,对应波长为1~10mm。毫米波天线罩与传统的分米波、厘米波天线罩相比,在结构、材料、性能及工艺技术等各方面都提出了更高的要求。
CN108274879A公开了一种高频透波夹层结构复合材料5G天线罩的制备方法,该天线罩由内外蒙皮和芯层材料组成,蒙皮材料采用玻璃纤维增强氰酸酯改性环氧树脂复合材料,芯层材料选用芳纶蜂窝芯。该天线罩在28GHz的工作频率下的面板透波率大于90%,即该天线罩只在单频下具有优异的透波性,而现在的天线罩并不仅仅接收一个频率的信号,需要同时接收多个频段、高带宽的信号。
CN104103898A公开了一种高透波低RCS天线罩,包括透波夹层结构薄层单元,每层透波夹层结构薄层单元固联于采用碳纤维敷制的金属化法兰围框区域,形成透波窗口,并采用一层接一层敷制的方式层叠结构,天线罩透波区域外形采用菱形或类似杏仁核类的流线型外形,并采用安装于低RCS载体平台之上进行仿真或测试,直接对天线罩进行仿真或者测试不能真实反映其RCS水平,其中,透波夹层结构薄层单元为一种三层结构,自上而下分别为石英纤维玻璃布、PMI泡沫、石英纤维玻璃布敷制而成的层叠结构。该天线罩也只满足高透波率,在多频段以及高带宽下的透波率并不理想。
发明内容
为了解决上述技术问题,本发明提供了一种宽频毫米波天线罩,天线罩为C型夹层结构,自上而下分别为石英纤维增强氰酸酯树脂、PMI泡沫、石英纤维增强氰酸酯树脂、PMI泡沫、石英纤维增强氰酸酯树脂。
进一步地,上述的宽频毫米波天线罩,所述石英纤维增强氰酸酯树脂的厚度为0.1~0.3mm。
进一步地,上述的宽频毫米波天线罩,所述石英纤维增强氰酸酯树脂的厚度为0.1mm。
进一步地,上述的宽频毫米波天线罩,所述PMI泡沫为蜂窝型。
进一步地,上述的宽频毫米波天线罩,所述PMI泡沫的厚度为1.5~2mm。
进一步地,上述的宽频毫米波天线罩,所述PMI泡沫的厚度为1.5mm。
进一步地,上述的宽频毫米波天线罩,所述天线罩在27~40GHz Ka波段下的面板透波率不小于95%,在80~100GHz W波段下的面板透波率不小于90%。
本发明还提供了上述宽频毫米波天线罩的制备方法,包括以下步骤:
(1)氰酸酯树脂胶液浸渍石英玻璃纤维制成预浸料;
(2)在模具表面从下到上依次铺覆预浸料、PMI泡沫、预浸料、PMI泡沫、预浸料;
(3)将铺覆完成的模具置于热压罐内一次固化成型。
进一步地,上述宽频毫米波天线罩的制备方法,其特征在于:步骤(1)中。所述预浸料的含胶量为30%-40%。
进一步地,上述宽频毫米波天线罩的制备方法,其特征在于:步骤(3)中,所述固化的温度为150~190℃,固化时间为4~6h,压力为0.2~0.4MPa。
本发明的有益效果:
本发明用石英纤维增强氰酸酯树脂与PMI泡沫制备的C型夹层结构的天线罩在27~40GHz Ka波段下的面板透波率大于95%,在80~100GHz W波段下的面板透波率大于90%。本发明选用了一种夹心材料,发泡倍率高且均匀性十分优异,介电常数低于1.05,该夹心层对各个高频段的毫米波波段具有较高的传输效率;且C型夹层结构为对称结构,可以展宽入射角和频带宽度,在频域和入射角域内低反射区较宽,能保证天线罩电性能裕度和容忍较大公差都是有益的,故而本发明的宽频天线罩在频率较宽的范围内都能使用。
显然,根据本发明的上述内容,按照本领域的普通技术知识和惯用手段,在不脱离本发明上述基本技术思想前提下,还可以做出其它多种形式的修改、替换或变更。
以下通过实施例形式的具体实施方式,对本发明的上述内容再作进一步的详细说明。但不应将此理解为本发明上述主题的范围仅限于以下的实施例。凡基于本发明上述内容所实现的技术均属于本发明的范围。
附图说明
图1为本发明宽频毫米波天线罩的结构示意图。
具体实施方式
实施例1
一种宽频透波夹层结构天线罩的制备方法,所述的天线罩为C型夹层结构,包括石英纤维增强氰酸酯树脂(0.1mm)、PMI泡沫(1.5mm)、石英纤维增强氰酸酯树脂(0.1mm)、PMI泡沫(1.5mm)、石英纤维增强氰酸酯树脂(0.1mm),制备方法如下:首先将氰酸酯树脂胶液浸渍石英玻璃纤维制成预浸料预浸料的含胶量为30%,在相应的模具表面从下到上依次铺覆预浸料、PMI泡沫、预浸布、PMI泡沫、预浸布,将铺覆完成的模具置于热压罐工艺一次固化成型,固化工艺为:固化温度170℃、保温时间4h,压力为0.4MPa,最后对天线罩面板进行喷漆及机加工后处理。
表面漆层厚度34μm,天线罩在27~40GHz Ka波段下的面板透波率为95%,在80~100GHz W波段下的面板透波率为90%。
实施例2
一种宽频透波夹层结构天线罩的制备方法,所述的天线罩为C型夹层结构,包括石英纤维增强氰酸酯树脂(0.3mm)、PMI泡沫(2mm)、石英纤维增强氰酸酯树脂(0.3mm)、PMI泡沫(2mm)、石英纤维增强氰酸酯树脂(0.3mm),制备方法如下:首先将氰酸酯树脂胶液浸渍石英玻璃纤维制成预浸料预浸料的含胶量为40%,在相应的模具表面从下到上依次铺覆预浸料、PMI泡沫、预浸布、PMI泡沫、预浸布,将铺覆完成的模具置于热压罐工艺一次固化成型,固化工艺为:固化温度190℃、保温时间4h,压力为0.4MPa,最后对天线罩面板进行喷漆及机加工后处理。
表面漆层厚度40μm,天线罩在27~40GHz Ka波段下的面板透波率为97%,在80~100GHz W波段下的面板透波率为93%。
Claims (10)
1.宽频毫米波天线罩,其特征在于:天线罩为C型夹层结构,自上而下分别为石英纤维增强氰酸酯树脂、PMI泡沫、石英纤维增强氰酸酯树脂、PMI泡沫、石英纤维增强氰酸酯树脂。
2.根据权利要求1所述的宽频毫米波天线罩,其特征在于:所述石英纤维增强氰酸酯树脂的厚度为0.1~0.3mm。
3.根据权利要求2所述的宽频毫米波天线罩,其特征在于:所述石英纤维增强氰酸酯树脂的厚度为0.1mm。
4.根据权利要求1所述的宽频毫米波天线罩,其特征在于:所述PMI泡沫为蜂窝型。
5.根据权利要求4所述的宽频毫米波天线罩,其特征在于:所述PMI泡沫的厚度为1.5~2mm。
6.根据权利要求5所述的宽频毫米波天线罩,其特征在于:所述PMI泡沫的厚度为1.5mm。
7.根据权利要求1~6任一项所述的宽频毫米波天线罩,其特征在于:所述天线罩在27~40GHz Ka波段下的面板透波率不小于95%,在80~100GHz W波段下的面板透波率不小于90%。
8.权利要求1~7任一项所述宽频毫米波天线罩的制备方法,其特征在于:包括以下步骤:
(1)氰酸酯树脂胶液浸渍石英玻璃纤维制成预浸料;
(2)在模具表面从下到上依次铺覆预浸料、PMI泡沫、预浸料、PMI泡沫、预浸料;
(3)将铺覆完成的模具置于热压罐内一次固化成型。
9.根据权利要求8所述宽频毫米波天线罩的制备方法,其特征在于:步骤(1)中。所述预浸料的含胶量为30%-40%。
10.根据权利要求8所述宽频毫米波天线罩的制备方法,其特征在于:步骤(3)中,所述固化的温度为150~190℃,固化时间为4~6h,压力为0.2~0.4MPa。
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CN113471691A (zh) * | 2021-06-30 | 2021-10-01 | 航天特种材料及工艺技术研究所 | 一种w波段天线罩及其制备方法 |
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