CN2116969U - 一种改型背射天线 - Google Patents
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Abstract
本实用新型公开了一种改型背射天线,它由圆锥
反射面、围边、波纹环、馈源、小反射器、极化套筒、刚
性同轴杆、俯仰装置等部分组成。本实用新型采用围
边加波纹环结构,使天线具有很宽的工作频带,很高
的前后比特性和增益高的辐射特性。并本实用新型
结构制作简单、体积小、成本低廉、使用调整方便,寿
命长,无需特殊保养,不但适用于通信、雷达等无线电
设备,更是战术移动无线中继通信的理想天线,具有
推广应用价值。
Description
本实用新型涉及无线电通信、雷达等设备用的一种改型背射天线,特别适用于作战术移动无线中继通信天线。
目前国内外战术移动无线中继通信用天线,普通常用角反射器、八元偶极子阵和抛物面天线等,随着通信手段的发展,上述几种常用的天线远远不能满足使用要求,如角反射器天线尺寸太大,安装使用不便。八元偶极子阵其馈电网络复杂,技术难度大,成本高、结构复杂,抛物面天线的增益和前后比不能满足战术移动无线中继通信要求,而且使用时变换极化,调整俯仰角都不方便。
本实用新型目的在于避免上述现有技术中不足之处而提供一种宽频带的改型背射天线,本实用新型不仅具有很宽的工作频带,而且具有很高的前后比和较高的增益,本实用新型还具有体积小、结构简单,调整使用方便,成本低廉等特点。
本实用新型的目的是这样实现的:它由园锥反射面1、围边2、波纹环3、馈源4、小反射器6、极化套筒7、俯仰度盘8、俯仰装置9、刚性同轴杆10、连接杆11组成。其中俯仰装置9上支点与园锥反射面1背面上端用销钉活动联接安装,并作园锥反射面1安装上支点,俯仰装置9调节螺杆安装在连接杆11顶端底板上与调节螺杆相配合的调节螺母内,为俯仰装置9可调支点,俯仰度盘8安装在连接杆11顶端底板上并用销钉活动联接园锥反射面1背面下端上,作园锥反射面1的安装下支点,连接杆11插装在天线杆顶端安装轴孔内,围边2焊接安装在园锥反射面1口径上,波纹环3焊接在围边2内径上,极化套筒7安装在园锥反射面1中心用螺母固定,刚性同轴杆10插装在极化套筒7内用紧固件锁紧,馈源4与刚性同轴杆10用法兰连接成一体,小反射器6套装在刚性同轴杆10前端并用螺钉固定。
本实用新型馈源4由板线平衡器13、对称振子12组成,板线平衡器13与刚性同轴杆10用法兰连接成一体,对称振子12螺纹结构安装在板线平衡器13两侧。
而且本实用新型园锥反射面1的园锥角5大于或等于15度,其口径尺寸14大小为30至440厘米,围边2高度尺寸15大小为6至90厘米,波纹环3内径尺寸16大小为22至330厘米。
本实用新型相比现有技术有如下优点:
1、本实用新型由于在园锥反射面1上加有较高的围边2和附加波纹环3、小反射器6,增加了天线增益、频带宽度和提高前后比性能,使天线技术指标明显提高。
2、本实用新型的馈源4馈电简单,使用调整方便,维修简易,使用寿命长。
3、本实用新型结构简单,加工制造容易要求低,并且体积小,成本低廉,是一种具有推广应用价值的改型背射天线,特别适合应用于战术移动无线中继通信作天线。
以下结合附图对本实用新型作进一步详细描述。
图1是本实用新型的安装结构示意图。
图2是本实用新型图1的左视图。
图3是本实用新型馈源4的结构示意图。
参照图1、图2、图3,本实用新型由园锥反射面1,围边2、波纹环3、馈源4、小反射器6、极化套筒7、俯仰度盘8、俯仰装置9、刚性同轴杆10、连接杆11组成,俯仰装置9上支点与园锥反射面1背面上端用销钉活动联接安装,并作园锥反射面1安装上支点,俯仰装置9调节螺杆安装在连接杆11顶端底板上与调节螺杆相配合的调节螺母内,为俯仰装置9可调支点,当调节俯仰装置9的调节螺母时,使调节螺杆作上下移动,从而达到天线的俯仰角度改变。实施例俯仰装置9采用市售20型优质结构钢机械加工而成。
俯仰度盘8安装在连接杆11顶端底板上并用销钉活动联接园锥反射面1背面下端上,并作园锥反射面的安装下支点,当天线的俯仰角度改变时,可从俯仰度盘8上直接读出俯仰角度大小,实施例俯仰度盘8安装在连接杆11顶端底板上的固定件加工成刻度盘,用销钉活动联接的活动件加工成指针装置,俯仰度盘8采用市售钢板材料制作而成。连接杆11插装在天线杆顶端安装轴孔内,实施例连接杆11采用钢板、钢棒材料机械加工而成。
天线的围边2焊接安装在园锥反射面1口径上,园锥反射面1的园锥角5的大小大于或等于15度,其口径尺寸14的大小为30至440厘米,围边2的高度尺寸15的大小为6至90厘米,实施例园锥反射面1的园锥角5的大小为20度,天线口径尺寸为105厘米,园锥反射面1上底的直径为30厘米,围边2的高度15尺寸为23厘米,围边2也可铆接安装在园锥反射面1口径上,其作用可以增加天线增益和提高前后比性能,实施例园锥反射面1、围边2均采用市售LF21-M型铝板制作,并在其上加工若干个小孔,小孔直径为φ13毫米,实施例园锥反射面1上加工有576个孔,围边2上加工有432个孔。
天线的波纹环3焊接在围边2的内径上,波纹环3按性能要求可以设置若干个用来展宽工作频带,实施例设置2个波纹环3即可,波纹环3内径尺寸16的大小为22至330厘米,外径尺寸与天线口径尺寸相同,实施例波纹环3内径尺寸16为84厘米,并用市售LF21-M型铝板制作而成。
本实用新型的极化套筒7安装在园锥反射面1中心,用螺母固定,刚性同轴杆10插装在极化套筒7内用紧固件锁紧,馈源4与刚性同轴杆10用法兰连接成一体,小反射器6套装在刚性同轴杆10前端并用螺钉固定。馈源4由板线平衡器13、对称振子12组成,板线平衡器13与刚性同轴杆10用法兰连接成一体,对称振子12螺纹结构安装在板线平衡器13两侧。小反射器6根据用途不同可设置不同个数量,用来增加天线增益,在结构上最前端的小反射器6直径小于后面的直径,实施例设置2个小反射器6,前端的直径为φ176毫米,后面的直径为190毫米,相互之间的安装距离为185毫米,采用市售LY12-C2型铝板材料制作而成,实施例极化套筒7、刚性同轴杆10均采用市售LY12-C2型铝棒材料加工而成,馈源4的板线平衡器13采用市售铜板材料制作成园柱型结构,套装在刚性同轴杆10外径上,对称振子12采用铝棒材料加工而成,安装结构距园锥反射面1的中心距离为195毫米,馈源4其作用辐射电磁波信号,改善匹配特性。
本实用新型简要电气原理如下,当来自发信机的高频信号能量,沿刚性同轴杆10并经馈源4的对称振子12辐射,在后面的小反射器6的反射作用下,电磁波入射到园锥反射面1、围边2、纹波环3上,这些电磁波经园锥反射面1反射,与围边2、波纹环3的二次辐射电磁波相叠加,再由前端小反射器6对电磁波的引向作用,使电磁波能量集中在天线轴方向辐射出去,保证天线在很宽工作带宽内,有较高的增益和很高的前后比特性。
Claims (3)
1、一种改型背射天线,由俯仰度盘8、俯仰装置9、连接杆11组成,其特征在于还有园锥反射面1、围边2、波纹环3、馈源4、小反射器6、极化套筒7、刚性同轴杆10组成,其中俯仰装置9上支点与园锥反射面1背面上端用销钉活动联接安装,并作园锥反射面1安装上支点,俯仰装置9调节螺杆安装在连接杆11顶端底板上,与调节螺杆相配合的调节螺母内,为俯仰装置9可调支点,俯仰度盘8安装在连接杆11顶端底板上并用销钉活动联接园锥反射面1背面下端上,作园锥反射面1的安装下支点,连接杆11插装在天线杆顶端安装轴孔内,围边2焊接安装在园锥反射面1口径上,波纹环3焊接在围边2内径上,极化套筒7安装在园锥反射面1中心,用螺母固定,刚性同轴杆10插装在极化套筒7内用紧固件锁紧,馈源4与刚性同轴杆10用法兰连成一体,小反射器6套装在刚性同轴杆10前端并用螺钉固定。
2、根据权利要求1所述的一种改型背射天线,其特征在于馈源4由板线平衡器13、对称振子12组成,板线平衡器13与刚性同轴杆10用法兰连接成一体,对称振子12螺纹结构安装在板线平衡器13两侧。
3、根据权利要求1或2所述的一种改型背射天线,其特征在于园锥反射面1的园锥角5大于或等于15度,其口径尺寸14大小为30至440厘米,围边2高度尺寸15大小为6至90厘米,波纹环3内径尺寸16大小为22至330厘米。
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