Broadband high frequency balun专利检索-巴伦电子功率变换器变压器和转换设备专利检索查询-专利查询网

Broadband high frequency balun

阅读：435发布：2022-01-12

专利汇可以提供Broadband high frequency balun专利检索，专利查询，专利分析的服务。并且A broadband high frequency balun is connectable between balanced and unbalanced transmission lines so that these lines are essentially colinear. The balun comprises a coaxial cable and a shorted stub in approximately a half-loop configuration, the balanced line being connected to the cable and stub within a conductive housing or shield. The cable-stub spacing is substantially greater than the effective length of the stub, thereby decreasing the lower frequency operating limit of the balun. The addition of a lossy layer to the inner surface of the housing permits a substantial increase in the operating bandwidth of the balun by suppressing adverse resonance effects within the housing.，下面是Broadband high frequency balun专利的具体信息内容。

权利要求

1. A device for transforming an unbalanced transmission line to a balanced transmission line comprising an electrically conductive casing having a side wall and parallel end walls connected to opposite ends of the side wall and defining a cavity therewithin, one of said end walls having an opening through which the balanced line extends into the cavity transversely of and insulated from said one end wall, said unbalanced line comprising a coaxial cable projecting into the cavity from the other end wall and having an outer conductor connected at opposite ends to said other end wall and to one conductor of said balanced transmission line, respectively, said cable also having an inner conductor connected within the cavity to the other conductor of said balanced line, a conductive stub electrically connecting the other conductor of said balanced line to said other end wall, said stub and said cable having substantially equal outer diameters and substantially equal lengths, and having first parallel portions, respectively, projecting into the cavity from said other end wall and being spaced apart by a distance substantially greater than the length of each of said first portions.

2. The device according to claim 1 with a thin layer of lossy material on the interior of said side wall.

3. A balun for interconnecting an unbalanced transmission line with a balanced transmission line comprising a cylindrical conductive housing having an axis and axially spaced end walls, one of said end walls having a central opening therein through which said balanced line extends axially into and insulated from said housing, an L-shaped coaxial cable having a first leg extending into the housing from the other end wall parallel to and offset from said axis and having a second leg extending radially inwardly from the first leg toward said balanced line, said cable having an inner conductor and an outer conductor, said outer conductor being electrically connecTed to said housing, means for electrically connecting said unbalanced line on the outside of said housing to said first leg of the cable whereby the unbalanced and balanced lines extend substantially parallel to one another, an L-shaped conductive stub in said housing having a first leg connected to said other end wall and extending parallel to and offset from said axis, said stub also having a second leg connected to and extending radially inwardly toward said balanced line colinearly with the second leg of the coaxial cable, said balanced line having first and second conductors connected to the outer and inner conductors, respectively, of said cable, said second conductor also being connected to said second leg of said stub, the spacing between the first legs of said cable and said stub being substantially greater than the length of said first leg of the stub.

4. The balun according to claim 3 in which said housing has a side wall, and a resistive coating on the inner surface of said side wall.

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Broadband high frequency balun

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