CN1473377A - 宽带相控阵天线及其相关方法 - Google Patents
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Abstract
宽带相控阵天线包括位于柔性基底上的偶极天线单元阵列。每个偶极天线单元具有媒体馈送部分和一对向外伸出的引线,而且邻接的偶极天线单元的邻接引线具有各自的间隔端部以在邻接的偶极天线单元之间提供增加的电容耦合。每条引线具有细长体部分和连接到细长体部分的端部的加宽端部。利用紧密封装的、具有大互电容耦合的偶极天线单元可以获得具有宽频带宽和宽扫描角的相控阵天线。
Description
本发明涉及通信领域,具体地说,本发明涉及相控阵天线。
现有的微波天线包括用于诸如卫星接收、远程广播或军事通信的各种应用的各种大量结构。通常,利用印刷电路天线可以实现要求的特性:成本低、重量轻、外形小以及生产率高。最简单形式的印刷电路天线是微带天线,其中平板导电单元与一个基本上连续的接地单元被均匀厚度的介质片分离。第3,995,277号美国专利说明书对微带天线的例子进行了披露。
以阵列方式设计这种天线,而且这种天线可以用于诸如敌我识别(IFF)系统、个人通信业务(PCS)系统、卫星通信系统以及航天系统的通信系统中,它们需要诸如成本低、重量轻、外形小以及旁瓣低的特性。
然而,这种天线的带宽和方向性能力会限制某些应用。尽管利用电磁耦合的微带接线对(patch pair)可以增加带宽,但是获得此益处对设计提出了极大挑战,特别是在要求保持外形小以及宽波束带宽方面。此外,通过设置预定扫描角,使用微带接线阵列可以提高方向性。然而,采用微带接线阵列提出了一个难题。如果各阵列单元更靠近在一起,则可以提高扫描角,但是更近的间隔会增加天线单元之间的所不希望的耦合,因此降低了性能。
此外,尽管微带接线天线的优点在于,要求共形(conformal)结构的应用,例如在航天系统中,但是对于将符合满意辐射覆盖和具有满意辐射覆盖反馈而保持方向性并减小围绕表面的损失的方式,安装天线提出了挑战。更具体地说,通常,通过将频率范围划分为多个频带,实现利用宽扫描角来提高相控阵天线的带宽。这种方法会显著提高天线的大小和重量,同时还产生无线电频率(RF)干扰问题。此外,利用机械方法,采用万向架(gimbal)获得要求的扫描角。同样,这种方法增加了天线的大小和重量,而且导致较慢的响应时间。
因此,需要一种具有宽频带宽和宽扫描角的、可以共形安装到表面上的重量轻的相控阵天线。
本发明包括...“X”...权利要求1
本发明还包括...“Y”...权利要求10
本发明的目的是提供一种具有宽频带宽和宽扫描角的、可以共形安装到表面上的重量轻相控阵天线。
宽带相控阵天线适于包括位于柔性基底上的偶极天线单元(dipole antenna element)。每个偶极天线单元包括媒体馈送部分和一对从其向外伸出的引线,邻接的偶极天线单元的邻接引线具有各自的间隔端部(spaced apart end portion)以在邻接的偶极天线单元之间提供增加的电容耦合。该间隔端部具有预定形状和相对位置以在邻接的偶极天线单元之间提供增加的电容耦合。邻接引线上的间隔端部最好包括叉指式部分,而且每条引线分别包括:细长体部分;连接到细长体部分的端部的加宽(enlarged width)端部;以及从所述加宽端部向外伸出的多个指状物(例如4个)。
宽带相控阵天线具有要求的频率范围,而且邻接引线的两个端部之间的间隔约小于最高要求频率的波长的一半。此外,偶极天线单元阵列可以包括第一组和第二组正交偶极天线单元以实现双极化。最好在偶极天线单元阵列的附近设置接地面,而且接地面与偶极天线单元阵列之间的间隔约小于最高要求频率的波长的一半。
每个偶极天线单元最好分别包括印刷导电层,而且以每平方英尺约100至900个的密度设置偶极天线单元阵列。确定偶极天线单元阵列的大小和相对位置,以便宽带相控阵天线可以在约2至30Ghz频率范围内、而且以约±60度的扫描角工作。可以在偶极天线单元阵列上至少有一个介质层,而且非平面三维形状的刚性安装件支持所述柔性基底。
一种制造宽带相控阵天线的方法,该方法的优点在于包括:在柔性基底上成型偶极天线单元阵列,其中每个偶极天线单元包括媒体馈送部分和一对从其向外伸出的引线。成型偶极天线单元阵列的过程包括成型并定位邻接的偶极天线单元的邻接引线的各自间隔端部,以在邻接的偶极天线单元之间提供增加的电容耦合。成型并定位各间隔端部的过程最好包括成型叉指式部分。
现在,将参考附图,以示例的方式说明本发明,附图包括:
图1是示出例如安装在飞机的头部、根据本发明的宽带相控阵天线的原理图。
图2是图1所示宽带相控阵天线的部件分解图。
图3是图1所示宽带相控阵天线的印刷导电层的示意图。
图4A和4B是图1所示宽带相控阵天线的邻接的偶极天线单元的邻接引线的间隔端部的放大示意图。
图5是本发明另一个实施例的宽带相控阵天线的印刷导电层的示意图。
图1和图2示出宽带相控阵天线10。天线10安装在例如飞机或航天飞机的头部12,或者具有非平面三维形状的其它刚性安装件上,而且熟练技术人员应当理解,还可以将它连接到发送与接收控制器14。
宽带相控阵天线10由多个柔性层构成,如图2所示。这些柔性层包括位于接地面(ground plane)30与盖层28之间的偶极子层20或电流板。此外,还设置泡沫介质层24和外部泡沫介质层26。各粘合层22将偶极子层20、接地面30、盖层28以及泡沫介质层24、26固定在一起形成柔性、共形天线10。为了改进扫描角,介质层24、26可以具有递变介电常数。例如,接地面30与偶极子层20之间的介质层24的介电常数可以为3.0,位于偶极子层20对面的介质层24的介电常数可以为1.7,而外部介质层26的介电常数可以为1.2。
现在,参考图3、4A和4B说明偶极子层20的第一实施例。偶极子层20是在柔性基底23上具有偶极天线单元40的印刷导电层。每个偶极天线单元40包括媒体馈送部分42和延伸到其外部的一对引线44。各馈线可以从基底23的相对侧连接到每个馈送部分42。为了在邻接的偶极天线单元之间提供增加的电容耦合,邻接的偶极天线单元40的邻接引线44具有各自的间隔端部46。为了提供增加的电容耦合,邻接的偶极天线单元40具有预定形状和相对位置。例如,邻接的偶极天线单元40之间的电容在约0.016至0.636皮法(pF),最好在0.159至0.239pF之间。
如图4A所示,邻接引线44上的间隔端部46具有交叠部分或叉指式部分47,而且每个引线44包括:细长体部分49;加宽端部51,连接到细长体部分的端部;以及多个指状物53,例如4个,从加宽端部向外伸出。
作为一种选择,如图4B所示,邻接的偶极天线单元40的邻接引线44’可以具有各自的间隔端部46’,以在邻接的偶极天线单元之间提供增加的电容耦合。在此实施例中,邻接引线44’的间隔端部46’包括加宽端部51’,加宽端部51’连接到细长体部分49’的端部以在邻接的偶极天线单元之间提供增加的电容耦合。在此,例如,间隔端部46’之间的距离K约为0.003英寸。
以每平方英尺约100至900个的密度设置偶极天线单元40的阵列。确定偶极天线单元40阵列的大小和相对位置,以使宽带相控阵天线10可以在约2至30Ghz的频率范围内、以约±60度(低扫描损耗)的扫描角工作。这种天线10还可以具有10∶1或者更大的带宽,这种天线10包括共形表面安装,同时重量较轻,而且容易以低成本制造。
例如,图4A是示出具有各自的间隔端部46以在邻接的偶极天线单元之间提供增加的电容耦合的邻接的偶极天线单元40的邻接引线44的以大倍数放大的放大视图。在此例中,邻接引线44和各自的间隔端部46可以具有如下尺寸:加宽端部51的长度E等于0.061英寸,细长体部分49的宽度F等于0.034英寸,邻接加宽端部51的组合宽度G等于0.044英寸,邻接引线44的组合高度H等于0.276英寸,多个指状物53中每个指状物的宽度I等于0.005英寸,邻接指状物53之间的间隔J等于0.003英寸。在此例中(参考图3),偶极子层20可以具有如下尺寸:宽度A为12英寸,高度B为16英寸。在此例中,沿宽度A的偶极天线单元40的数量C为43,而沿长度B的偶极天线单元的数量D为65,产生2795个偶极天线单元的阵列。
宽带相控阵天线10具有要求的频率范围,例如2GHz至18GHz,而且邻接引线44的端部46之间的间隔约小于最高要求频率的波长的一半。
参考图5,熟练技术人员应当理解,偶极子层20’的另一个实施例可以包括互相正交的第一组和第二组偶极天线单元40以实现双极化。
根据本发明的方法方面包括通过在柔性基底23上成型偶极天线单元40的阵列,制造宽带相控阵天线10。这最好包括在基底23上印刷和/或蚀刻偶极天线单元40的导电层。如图5所示,为了实现双极化,可以互相正交成型第一组和第二组偶极天线单元40。
此外,每个偶极天线单元40分别包括媒体馈送部分42和从其向外伸出的引线44对。成型偶极天线单元40的阵列的过程包括成型并定位邻接的偶极天线单元的邻接引线44的各间隔端部46以在邻接的偶极天线单元之间提供增加的电容耦合。成型并定位各间隔端部46的过程包括成型叉指式部分47(参考图4A)或加宽端部51’(参考图4B)。最好在偶极天线单元40阵列的附近,成型接地面30,而且在中间具有粘合层22的情况下,在偶极子层20的两侧成型一个或者多个介质层24、26。
成型偶极天线单元40的阵列的过程可以进一步包括成型:具有细长体部分49的每个引线44;连接到细长体部分的端部的加宽端部51;以及从加宽端部向外伸出的多个指状物53。此外,宽带相控阵天线10具有要求的频率范围,而且邻接引线44的端部46之间的间隔约小于最高要求频率的波长的一半。接地面30与偶极天线单元40的阵列之间的间隔小于最高要求频率的波长的一半。
确定偶极天线单元40的阵列的大小和相对位置,以使宽带相控阵天线10可以在约2至30GHz的频率范围内工作,而且可以在约±60度的扫描角内工作。该方法还可以包括在非平面三维形状的刚性安装件12,例如飞机或航天飞机的头部(参考图1)上安装天线10。
因此,利用具有大互电容耦合的、紧密封装的偶极天线单元40,可以获得具有宽频带宽和宽扫描角的相控阵天线10。传统方法试图降低偶极子之间的互耦合,但是本发明却利用并提高紧密间隔偶极天线单元之间的互耦合来防止栅波瓣(grating lobe)而且实现宽带宽。可以利用波束形成装置扫描天线10,而且每个偶极天线单元40具有宽波束宽度。可以调节单元40在柔性基底23或印刷电路板上的布局,或者波束形成装置可以用于调节各单元的通路长度以使它们同相。
宽带相控阵天线包括位于柔性基底上的偶极天线单元阵列。每个偶极天线单元分别具有媒体馈送部分和一对向外伸出的引线,而且邻接的偶极天线单元的邻接引线具有各自的间隔端部以在邻接的偶极天线单元之间提供增加的电容耦合。每条引线具有细长体部分和连接到该细长体部分的端部的加宽端部。利用具有大互电容耦合的紧密封装偶极天线单元,可以获得具有宽频带宽和宽扫描角的相控阵天线。
Claims (13)
1、一种宽带相控阵天线,该宽带相控阵天线包括:柔性基底;以及位于所述柔性基底上的偶极天线单元阵列,每个偶极天线单元包括媒体馈送部分和一对从其向外伸出的引线,邻接的偶极天线单元的邻接引线包括具有预定形状和相对位置的各间隔端部以在邻接的偶极天线单元之间提供增加的电容耦合。
2、根据权利要求1所述的宽带相控阵天线,其中每条引线分别包括细长体部分、连接到细长体部分的端部的加宽端部,邻接引线上的间隔端部包括叉指式部分,每条引线分别包括:细长体部分;连接到细长体部分的端部的加宽端部;以及从所述加宽端部向外伸出的多个指状物。
3、根据权利要求1所述的宽带相控阵天线,其中邻接的偶极天线单元之间的电容耦合约在0.159至0.239pF之间,宽带相控阵天线具有要求的频率范围;而且邻接引线的端部之间的间隔约小于最高要求频率的波长的一半。
4、根据权利要求1所述的宽带相控阵天线,其中所述偶极天线单元阵列包括第一组和第二组正交偶极天线单元以实现双极化,在所述偶极天线单元阵列的附近包括接地面,而且其中宽带相控阵天线具有要求的频率范围,所述接地面与所述偶极天线单元阵列之间的间隔约小于最高要求频率的波长的一半。
5、根据权利要求1所述的宽带相控阵天线,其中每个偶极天线单元均包括印刷导电层,所述偶极天线单元阵列以每平方英尺约100至900个的密度被设置,其中所述偶极天线单元阵列的大小和相对位置被确定,以便宽带相控阵天线可以在约2至30Ghz频率范围内工作。
6、根据权利要求1所述的宽带相控阵天线,其中所述偶极天线单元阵列的大小和相对位置被确定,以便宽带相控阵天线可以在约±60度的扫描角内工作,所述偶极天线单元阵列至少包括一个介质层,而且非平面三维形状的刚性安装件支持所述柔性基底。
7、一种宽带相控阵天线,该宽带相控阵天线包括偶极天线单元阵列,每个偶极天线单元包括媒体馈送部分和一对从其向外伸出的引线,邻接的偶极天线单元的邻接引线具有各自的间隔叉指式端部以在邻接的偶极天线单元之间提供增加的电容耦合。
8、根据权利要求7所述的宽带相控阵天线,其中每条引线:细长体部分;连接到细长体部分的端部的加宽端部;从所述加宽端部向外伸出的多个指状物,其中多个指状物至少包括4个指状物,宽带相控阵天线具有要求的频率范围;而且邻接引线的端部之间的间隔约小于最高要求频率的波长的一半,所述偶极天线单元阵列包括第一组和第二组正交偶极天线单元以实现双极化。
9、根据权利要求7所述的宽带相控阵天线,该宽带相控阵天线进一步包括:承载所述偶极天线单元阵列的基底;邻接所述偶极天线单元阵列的接地面,宽带相控阵天线具有要求的频率范围;而所述接地面与所述偶极天线单元阵列之间的间离约小于最高要求频率的波长的一半,每个偶极天线单元分别包括印刷导电层,其中所述偶极天线单元阵列以每平方英尺约100至900个的密度被设置,而且所述偶极天线单元阵列的大小和相对位置被确定,以便宽带相控阵天线可以在约2至30Ghz的频率范围内工作,以便宽带相控阵天线可以在约±60度的扫描角内工作。
10、一种制造宽带相控阵天线的方法,该方法包括:提供柔性基底,在柔性基底上成型偶极天线单元阵列,每个偶极天线单元包括媒体馈送部分和一对从其向外伸出的引线,其中成型偶极天线单元阵列的过程包括成型并定位邻接的偶极天线单元的邻接引线的各自间隔端部,以在邻接的偶极天线单元之间提供增加的电容耦合。
11、根据权利要求10所述的方法,其中成型偶极天线单元阵列的过程包括成型每条引线,该引线分别具有细长体部分、连接到细长体部分的端部的加宽端部,成型并定位各间隔端部的过程包括成型叉指式部分,其中成型偶极天线单元阵列的过程包括成型每条引线,该引线具有:细长体部分;加宽端部,连接到细长体部分的端部;以及多个指状物,从所述加宽端部向外伸出。
12、根据权利要求10所述的方法,其中宽带相控阵天线具有要求的频率范围;而且邻接引线的端部之间的间隔约小于最高要求频率的波长的一半,偶极天线单元阵列包括成型第一组和第二组正交偶极天线单元以实现双极化,该方法包括在偶极天线单元阵列附近成型接地面,该宽带相控阵天线具有要求的频率范围,而且其中接地面与偶极天线单元阵列之间的间隔约小于最高要求频率的波长的一半。
13、根据权利要求10所述的方法,其中成型偶极天线单元阵列的过程包括印刷导电层以成型每个偶极天线单元,确定偶极天线单元阵列的大小和相对位置,以便宽带相控阵天线可以在约2至30Ghz的频率范围内工作,确定偶极天线单元阵列的大小和相对位置,以便宽带相控阵天线可以在约±60度的扫描角内工作,在偶极天线单元阵列上至少具有一个介质层,将承载偶极天线单元阵列的柔性基底安装到非平面、三维形状的刚性安装件上。
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CA1290450C (en) * | 1987-09-09 | 1991-10-08 | Thomas Tralman | Polarization selective surface for circular polarization |
US5485167A (en) | 1989-12-08 | 1996-01-16 | Hughes Aircraft Company | Multi-frequency band phased-array antenna using multiple layered dipole arrays |
CA2011298C (en) * | 1990-03-01 | 1999-05-25 | Adrian William Alden | Dual polarization dipole array antenna |
US6057802A (en) * | 1997-06-30 | 2000-05-02 | Virginia Tech Intellectual Properties, Inc. | Trimmed foursquare antenna radiating element |
US6362906B1 (en) * | 1998-07-28 | 2002-03-26 | Raytheon Company | Flexible optical RF receiver |
-
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- 2000-10-31 US US09/703,247 patent/US6512487B1/en not_active Expired - Fee Related
-
2001
- 2001-07-31 US US09/919,449 patent/US6417813B1/en not_active Expired - Lifetime
- 2001-10-31 CN CNA018182461A patent/CN1473377A/zh active Pending
- 2001-10-31 AT AT01987209T patent/ATE306126T1/de not_active IP Right Cessation
- 2001-10-31 DE DE60113872T patent/DE60113872T2/de not_active Expired - Fee Related
- 2001-10-31 JP JP2002543741A patent/JP3871266B2/ja not_active Expired - Fee Related
- 2001-10-31 WO PCT/US2001/045679 patent/WO2002041443A2/en active IP Right Grant
- 2001-10-31 AU AU2002239448A patent/AU2002239448A1/en not_active Abandoned
- 2001-10-31 BR BR0115387-0A patent/BR0115387A/pt not_active IP Right Cessation
- 2001-10-31 EP EP01987209A patent/EP1330850B1/en not_active Expired - Lifetime
- 2001-10-31 CA CA002425941A patent/CA2425941C/en not_active Expired - Fee Related
- 2001-10-31 MX MXPA03003597A patent/MXPA03003597A/es unknown
Cited By (8)
Publication number | Priority date | Publication date | Assignee | Title |
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CN1989652B (zh) * | 2004-06-28 | 2013-03-13 | 脉冲芬兰有限公司 | 天线部件 |
US8786499B2 (en) | 2005-10-03 | 2014-07-22 | Pulse Finland Oy | Multiband antenna system and methods |
CN102394349A (zh) * | 2011-07-08 | 2012-03-28 | 电子科技大学 | 一种基于强互耦效应的八角环平面双极化宽带相控阵天线 |
CN102394349B (zh) * | 2011-07-08 | 2014-12-10 | 电子科技大学 | 一种基于强互耦效应的八角环平面双极化宽带相控阵天线 |
CN105518933A (zh) * | 2013-08-08 | 2016-04-20 | 曼彻斯特大学 | 宽带阵列天线 |
CN105518933B (zh) * | 2013-08-08 | 2018-06-26 | 曼彻斯特大学 | 宽带阵列天线 |
CN110323575A (zh) * | 2019-05-09 | 2019-10-11 | 电子科技大学 | 电磁超材料加载的双极化强耦合超宽带相控阵天线 |
CN113113783A (zh) * | 2021-03-09 | 2021-07-13 | 北京航空航天大学 | 一种适用于高速飞行器头部的高增益共型天线 |
Also Published As
Publication number | Publication date |
---|---|
DE60113872D1 (de) | 2005-11-10 |
US20020050951A1 (en) | 2002-05-02 |
DE60113872T2 (de) | 2006-04-20 |
US6417813B1 (en) | 2002-07-09 |
WO2002041443A3 (en) | 2002-12-27 |
CA2425941C (en) | 2005-06-28 |
WO2002041443A2 (en) | 2002-05-23 |
MXPA03003597A (es) | 2003-08-20 |
JP3871266B2 (ja) | 2007-01-24 |
CA2425941A1 (en) | 2002-05-23 |
AU2002239448A1 (en) | 2002-05-27 |
EP1330850B1 (en) | 2005-10-05 |
BR0115387A (pt) | 2004-01-27 |
JP2004514363A (ja) | 2004-05-13 |
EP1330850A2 (en) | 2003-07-30 |
ATE306126T1 (de) | 2005-10-15 |
US6512487B1 (en) | 2003-01-28 |
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