DEVICE FOR SEPARATING TRANSMISSION AND RECEPTION SIGNALS
    2.
    发明公开
    DEVICE FOR SEPARATING TRANSMISSION AND RECEPTION SIGNALS 有权
    安排独立的传输和接收信号

    公开(公告)号:EP1344274A1

    公开(公告)日:2003-09-17

    申请号:EP01270920.0

    申请日:2001-12-04

    CPC classification number: H01P1/2131

    Abstract: The invention proposes a transmitting/receiving device comprising at least one transition zone (2 and 3) which comprises a means (7) of transforming a polarized wave of a first polarization into an electrical signal; a second means (8) of transforming an electrical signal into a polarized wave of the second polarization; and a first filtering zone (4) placed between the antenna and the transition zone, the first filtering zone comprising a waveguide filter polarized in the second polarization direction, the said filter being transparent in the first polarization direction.

    VHF ADAPTER FOR CABLE NETWORK
    3.
    发明公开
    VHF ADAPTER FOR CABLE NETWORK 有权
    VHF适配器电缆网

    公开(公告)号:EP1540814A1

    公开(公告)日:2005-06-15

    申请号:EP03765113.0

    申请日:2003-06-25

    CPC classification number: H03D7/163

    Abstract: The invention relates to VHF adapters for cable networks of the ODU type. It consists in using two conversion chains, up and down, in which a very stable single reference oscillator (403) drives means (404, 405, 410, 423) of generating the VHF and IF local frequencies common to these two conversion chains. A very selective surface wave filter (417) makes it possible to reject the frequency of the local oscillator at the level of the first intermediate frequency. It makes it possible to obtain a DOCSIS compatible millimetre MWS ODU whose frequency stability and spectral purity satisfy the constraints of the cable standard without undertaking spectral inversion of the signals transmitted and received.

    BANDPASS FILTER WITH PSEUDO-ELLIPTIC RESPONSE
    4.
    发明公开
    BANDPASS FILTER WITH PSEUDO-ELLIPTIC RESPONSE 有权
    伪椭圆带通滤波器

    公开(公告)号:EP1570541A1

    公开(公告)日:2005-09-07

    申请号:EP03796060.6

    申请日:2003-11-26

    CPC classification number: H01P1/208

    Abstract: The invention proposes an H-plane filter with inductive irises which exhibits a quasi-elliptic response while retaining the same compactness as a filter having a Chebyshev response. The invention furthermore makes it possible to use a large number of transmission zeros. For this purpose, there is proposed a waveguide filter comprising at least one cavity (4) delimited by at least two inductive irises (7). The filter furthermore comprises at least one floating insert (1) placed in one of the inductive irises (7). The invention is also a process for manufacturing the waveguide filter incorporating at least one insert.

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