公开(公告)号：US11121471B2

公开(公告)日：2021-09-14

申请号：US16961977

申请日：2018-01-18

Applicant: SAAB AB

Inventor： Ola Forslund

IPC: H01Q11/10 ,  H01Q21/24

Abstract: The invention relates to an antenna. The antenna comprises a feed line having first and second ends on opposite sides of the feed line, wherein a transmission axis is defined as the axis extending between the first and second ends of the feed line. Further, the antenna comprises a plurality of antenna elements arranged along the feed line, protruding from the transmission axis. The antenna also comprises a first port at the first end of the feed line, wherein, at a first part of the antenna, the feed line, from the first port towards a reference point along the transmission axis, comprises antenna elements of gradually increasing length, configured to radiate in a first direction along the transmission axis from the reference point towards the first port during excitation in the first port. Yet further, the antenna comprises a second port at the second end of the feed line, wherein, at a second part of the antenna, the feed line, from the second port towards the reference point along the transmission axis, comprises antenna elements of gradually increasing length, configured to radiate in a second direction along the transmission axis from the reference point towards the second port during excitation in the second port.

公开(公告)号：US09368859B2

公开(公告)日：2016-06-14

申请号：US14420187

申请日：2012-10-09

Applicant: SAAB AB

Inventor： Ola Forslund ,  Henrik Holter

IPC: H01Q1/32 ,  H01Q1/27 ,  H01Q17/00 ,  H01Q21/06 ,  H01Q9/04

CPC classification number: H01Q1/27 ,  H01Q1/3291 ,  H01Q9/0407 ,  H01Q17/00 ,  H01Q21/065

Abstract: An antenna frame for reducing radar cross section of a vehicle provided with a flat microstrip patch antenna array comprising a number of microstrip patches arranged in an array pattern, the antenna frame: —being arranged to surround the outer periphery of the flat antenna array —the frame comprising a first conductive sheet; —the first conductive sheet extending from the most peripheral patches and outward in a sloping manner; wherein dielectric and magnetic absorbent material are arranged to improve impedance transition from a point of the antenna to a point on the periphery of the frame, which is also contemplated as adjoining a vehicle fuselage.

Abstract translation: 一种用于减少具有扁平微带贴片天线阵列的车辆的雷达横截面的天线框架，该平面微带贴片天线阵列包括以阵列图形排列的多个微带贴片，天线框架：被布置成围绕平面天线阵列的外周边 框架，包括第一导电片; - 第一导电板从最外围的补片延伸并以倾斜的方式向外延伸; 其中布置介电和磁吸收材料以改善从天线点到框架周边上的点的阻抗转变，其也被设想为邻近车辆机身。

公开(公告)号：US20150207213A1

公开(公告)日：2015-07-23

申请号：US14420187

申请日：2012-10-09

Applicant: SAAB AB

Inventor： Ola Forslund ,  Henrik Holter

IPC: H01Q1/27 ,  H01Q17/00 ,  H01Q9/04

CPC classification number: H01Q1/27 ,  H01Q1/3291 ,  H01Q9/0407 ,  H01Q17/00 ,  H01Q21/065

Abstract: An antenna frame for reducing radar cross section of a vehicle provided with a flat microstrip patch antenna array comprising a number of microstrip patches arranged in an array pattern, the antenna frame:—being arranged to surround the outer periphery of the flat antenna array—the frame comprising a first conductive sheet;—the first conductive sheet extending from the most peripheral patches and outward in a sloping manner; wherein dielectric and magnetic absorbent material are arranged to improve impedance transition from a point of the antenna to a point on the periphery of the frame, which is also contemplated as adjoining a vehicle fuselage.

Abstract translation: 一种用于减少车​​辆的雷达横截面的天线框架，该天线框架设置有平面微带贴片天线阵列，该平面微带贴片天线阵列包括以阵列图案排列的多个微带贴片，所述天线框架被设置为围绕平面天线阵列的外围 框架，包括第一导电片; - 第一导电片从最外围的片延伸并以倾斜的方式向外延伸; 其中布置介电和磁吸收材料以改善从天线点到框架周边上的点的阻抗转变，其也被设想为邻近车辆机身。

公开(公告)号：US20160308284A1

公开(公告)日：2016-10-20

申请号：US15100844

申请日：2013-12-19

Applicant: SAAB AB

Inventor： Ola Forslund ,  Henrik Holter ,  Andreas Wikstroem

IPC: H01Q21/00 ,  H01Q1/50 ,  H01Q21/24 ,  H03H7/42

CPC classification number: H01Q21/0006 ,  H01P5/10 ,  H01Q1/50 ,  H01Q21/061 ,  H01Q21/24 ,  H03H7/422 ,  H05K1/0298 ,  H05K1/16

Abstract: The present disclosure relates to a balun suitable for realising a wideband transition in the radio frequency band from an unbalanced transmission line to a balanced transmission line. The balun comprises an input terminal; a two conductor output terminal; and a layered structure comprising a number of conducting layers and dielectric layers alternatingly arranged on top of each other. The layered structure comprises at least one ground plane layer and at least one signal transmission layer. The input terminal has a signal connection point and a screen connecting point. An unbalanced signal path is connected to the signal connection point and the screen connecting point of the input terminal. A balanced signal path is connected to the output terminal and being part of the layered structure. A balun transition region transforms the signal from an unbalanced signal to a balanced signal. The balun transition region comprises a non-conducting gap between the screen of the unbalanced signal and a dummy screen structure. The dummy screen structure is a mirror structure, mirrored in a plane of the gap, of a horizontal portion of the unbalanced signal path before the gap. A central conductor or signal conductor of the unbalanced signal path traverses the gap and enters a volume defined by the dummy screen structure. The screen of the unbalanced signal in the vicinity of the gap forms a first balanced conductor being part of the layered structure and the screen of the dummy screen structure, in vicinity of the gap, forms a second balanced conductor being part of the layered structure.

Abstract translation: 本公开涉及适用于实现从不平衡传输线到平衡传输线的无线电频带中的宽带转变的平衡 - 不平衡变压器。 平衡 - 不平衡转换器包括输入端子; 一个双线输出端子; 以及包括交替布置在彼此顶部的多个导电层和电介质层的分层结构。 分层结构包括至少一个接地层和至少一个信号传输层。 输入端子具有信号连接点和屏幕连接点。 不平衡信号路径连接到信号连接点和输入端子的屏幕连接点。 平衡信号路径连接到输出端并且是分层结构的一部分。 平衡不平衡转换转换区域将信号从不平衡信号转换为平衡信号。 平衡 - 不平衡变压器过渡区域包括不平衡信号的屏幕与虚拟屏幕结构之间的非导通间隙。 虚拟屏幕结构是在间隙之前的不平衡信号路径的水平部分的间隙的平面中的镜像结构。 不平衡信号路径的中心导体或信号导体穿过间隙并进入由虚拟屏幕结构限定的体积。 在间隙附近的不平衡信号的屏幕形成作为层状结构的一部分的第一平衡导体，并且在间隙附近的虚拟屏幕结构的屏幕形成作为层状结构的一部分的第二平衡导体。

公开(公告)号：US11936117B2

公开(公告)日：2024-03-19

申请号：US17436181

申请日：2019-03-04

Applicant: SAAB AB

Inventor： Ola Forslund

IPC: H01Q25/04 ,  H01P1/16 ,  H01P1/213 ,  H01Q13/02 ,  H01Q15/22

CPC classification number: H01Q25/04 ,  H01P1/16 ,  H01P1/2131 ,  H01Q13/025 ,  H01Q15/22

Abstract: Provided is a dual-band multimode antenna feed for a high-frequency band and a low-frequency band. The feed includes four high-frequency waveguide ports, where each high-frequency waveguide port is connected to a respective high-frequency input/output waveguide. Each high-frequency input/output waveguide includes a high-frequency waveguide aperture facing a first section for mixing electromagnetic modes in the E-plane. The first section is connected to a second section for mixing electromagnetic modes in the H-plane. The feed further includes a low-frequency waveguide port connected to a low-frequency input/output waveguide. A filter is arranged inside the first section to be transparent for plane wave modes exhibited at lower frequencies and reflecting for plane wave modes exhibited at higher frequencies.

公开(公告)号：US09583841B2

公开(公告)日：2017-02-28

申请号：US15100844

申请日：2013-12-19

Applicant: SAAB AB

Inventor： Ola Forslund ,  Henrik Holter ,  Andreas Wikstroem

IPC: H01P5/10 ,  H03H7/42 ,  H01Q21/00 ,  H01Q21/06 ,  H01Q21/24 ,  H01Q1/50 ,  H05K1/02 ,  H05K1/16

CPC classification number: H01Q21/0006 ,  H01P5/10 ,  H01Q1/50 ,  H01Q21/061 ,  H01Q21/24 ,  H03H7/422 ,  H05K1/0298 ,  H05K1/16

Abstract: The present disclosure relates to a balun suitable for realizing a wideband transition in the radio frequency band from an unbalanced transmission line to a balanced transmission line. The balun comprises an input terminal; a two conductor output terminal; and a layered structure comprising a number of conducting layers and dielectric layers alternatingly arranged on top of each other. The layered structure comprises at least one ground plane layer and at least one signal transmission layer. The input terminal has a signal connection point and a screen connecting point. An unbalanced signal path is connected to the signal connection point and the screen connecting point of the input terminal. A balanced signal path is connected to the output terminal and being part of the layered structure. A balun transition region transforms the signal from an unbalanced signal to a balanced signal. The balun transition region comprises a non-conducting gap between the screen of the unbalanced signal and a dummy screen structure. The dummy screen structure is a mirror structure, mirrored in a plane of the gap, of a horizontal portion of the unbalanced signal path before the gap. A central conductor or signal conductor of the unbalanced signal path traverses the gap and enters a volume defined by the dummy screen structure. The screen of the unbalanced signal in the vicinity of the gap forms a first balanced conductor being part of the layered structure and the screen of the dummy screen structure, in vicinity of the gap, forms a second balanced conductor being part of the layered structure.

Abstract translation: 本公开涉及适用于实现从不平衡传输线到平衡传输线的无线电频带中的宽带转变的平衡 - 不平衡变压器。 平衡 - 不平衡转换器包括输入端子; 一个双线输出端子; 以及包括交替布置在彼此顶部的多个导电层和电介质层的分层结构。 分层结构包括至少一个接地层和至少一个信号传输层。 输入端子具有信号连接点和屏幕连接点。 不平衡信号路径连接到信号连接点和输入端子的屏幕连接点。 平衡信号路径连接到输出端并且是分层结构的一部分。 平衡不平衡转换转换区域将信号从不平衡信号转换为平衡信号。 平衡 - 不平衡变压器过渡区域包括不平衡信号的屏幕与虚拟屏幕结构之间的非导通间隙。 虚拟屏幕结构是在间隙之前的不平衡信号路径的水平部分的间隙的平面中的镜像结构。 不平衡信号路径的中心导体或信号导体穿过间隙并进入由虚拟屏幕结构限定的体积。 在间隙附近的不平衡信号的屏幕形成作为层状结构的一部分的第一平衡导体，并且在间隙附近的虚拟屏幕结构的屏幕形成作为层状结构的一部分的第二平衡导体。