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    • 1. 发明授权
    • Dual polarization waveguide including means for reflecting and rotating
dual polarized signals
    • 双极化波导包括用于反射和旋转双极化信号的装置
    • US5619173A
    • 1997-04-08
    • US167893
    • 1994-05-02
    • Gerard KingAndrew P. BairdStephen J. Flynn
    • Gerard KingAndrew P. BairdStephen J. Flynn
    • H01P1/161H04B1/22H01P1/165
    • H01P1/161
    • A dual polarisation waveguide probe system for use with a satellite dish (10) for receiving satellite signals orthogonally polarised in the same frequency band and for providing improved isolation between these polarised satellite signals is disclosed. The probe system has a waveguide (28) incorporated in a low-noise block receiver (12) into which two probes (34, 38) are located for receiving linearly polarised energy of both orthogonal senses. The probes (34, 38) are located in the same longitudinal plane on opposite sides of a single cylindrical bar reflector (36) which reflects one sense of polarisation and passes the orthogonal signal with minimal insertion loss, and then reflects the rotated orthogonal signal. The probes (34, 38) are spaced .lambda./4 from the reflector (36). A reflection rotator (44) is also formed using a thin plate which is orientated at 45.degree. to the incident linear polarisation with a short circuit (46) spaced approximately a quarter wavelength (.lambda./4) behind the leading edge of the plate (43). This structure splits the incident energy into two equal components in orthogonal planes, one component being reflected by the leading edge (43) and the other component being reflected by the waveguide short circuit (46). The resultant 180.degree. phase shift between the reflected components causes a 90.degree. rotation in the plane of linear polarisation upon re-combination so that the waveguide outputs (34a, 38a) are located in the same longitudinal plane. Various embodiments and advantages of the invention are described.
    • PCT No.PCT / GB92 / 01065 Sec。 371日期:1994年5月2日 102(e)日期1994年5月2日PCT提交1992年6月15日PCT公布。 公开号WO92 / 22938 日期1992年12月23日公开了一种与卫星天线(10)一起使用的用于接收在相同频带中正交极化的卫星信号并且用于提供这些极化卫星信号之间的改进隔离的双极化波导探测系统。 探针系统具有并入到低噪声块接收器(12)中的波导(28),两个探针(34,38)被定位成用于接收两个正交感测的线性极化能量。 探针(34,38)位于单个圆柱形反射器(36)的相对侧的同一纵向平面中,该反射器反射一种极化感并以最小的插入损耗通过正交信号,然后反射旋转的正交信号。 探针(34,38)与反射器(36)间隔开λ/ 4。 反射旋转体(44)也使用薄板形成,该薄板以相对于入射线性偏振为45°的薄板以在板(43)的前边缘之后隔开大约四分之一波长(λ/ 4)的短路(46) )。 该结构将入射能量分为正交平面中的两个相等的分量,一个分量被前沿(43)反射,另一个分量被波导短路(46)反射。 反射分量之间的所得180°相移在重新组合时在线偏振平面中产生90度旋转,使得波导输出(34a,38a)位于相同的纵向平面中。 描述本发明的各种实施例和优点。
    • 10. 发明授权
    • High isolation switch
    • 高隔离开关
    • US5521562A
    • 1996-05-28
    • US162168
    • 1994-05-02
    • Stephen J. Flynn
    • Stephen J. Flynn
    • H04M3/00H01P1/15H03F3/72H03K17/693
    • H01P1/15H03F3/72H03K17/693
    • A switch for transmitting a signal with gain from one of a plurality of input transmission lines (10A,10B,10N) to a common output line (14) is described which achieves high isolation by omitting the transmission line between the output matching section and the junction of the input and the output. In one embodiment the output of each amplifier, a field effect transistor (38,40), is coupled directly to a common output (34) and the output matching circuitry is also omitted from the input lines, there being provided a common output matching and bias network located in the output line. In another embodiment the output matching network (26a,26b;64a,64b) is coupled directly to the common junction (16;56) and the transmission line length between the output matching network and the junction is omitted for each input line.
    • PCT No.PCT / GB92 / 01064 Sec。 371日期:1994年5月2日 102(e)日期1994年5月2日PCT提交1992年6月15日PCT公布。 公开号WO92 / 22937 日期:1992年12月23日。描述了一种用于从多个输入传输线(10A,10B,10N)中的一个传输信号到公共输出线(14)的增益信号的开关,其通过省略传输线 在输出匹配部分和输入和输出的结点之间。 在一个实施例中,每个放大器,场效应晶体管(38,40)的输出直接耦合到公共输出(34),并且输出匹配电路也从输入线路中省略,提供了公共输出匹配和 偏置网络位于输出线路。 在另一个实施例中,输出匹配网络(26a,26b; 64a,64b)直接耦合到公共结点(16; 56),并且对于每个输入线,省略了输出匹配网络和结点之间的传输线路长度。