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。

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。