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    Dual slot cavity antenna with slots of differing resonant frequencies
    21.
    发明专利
    Dual slot cavity antenna with slots of differing resonant frequencies 未知

    公开(公告)号：GB2411524A

    公开(公告)日：2005-08-31

    申请号：GB0510672

    申请日：2002-03-22

    Applicant: HRL LAB LLC

    Inventor： SIEVENPIPER DANIEL

    IPC: H01Q1/32 ,  H01Q13/10 ,  H01Q13/18 ,  H01Q21/24

    Abstract: An antenna comprises a cavity 20 with conductive material on opposing surfaces 24, 26. Two slots 16-1, 16-2 in the conductive material, which may cross at 90 degrees, are of different lengths and have resonant frequencies above and below the resonance of the antenna as a whole. The conductive surfaces may be formed on a dielectric body 20. The antenna is adapted to receive both linearly polarised and circularly polarized signals. The antenna may be adapted for mounting on a vehicle with a mounting bracket and a protective cover. The conductive surface with the slots may be dome shaped and the protective cover may be formed on the surface. Alternatively, the protective cover may form a radome. The lengths of the slot may be calculated from the required frequency and bandwidth and the dielectric constant of the slots using a disclosed method.

    A textured surface having high electromagnetic impedance in multiple frequency bands
    22.
    发明专利
    A textured surface having high electromagnetic impedance in multiple frequency bands 未知

    公开(公告)号：GB2385994A

    公开(公告)日：2003-09-03

    申请号：GB0310485

    申请日：2001-10-04

    Applicant: HRL LAB LLC

    Inventor： SCHAFFNER JAMES H ,  SIEVENPIPER DANIEL

    IPC: H01Q15/14 ,  H01Q1/38 ,  H01Q1/48 ,  H01Q15/00

    Abstract: A high impedance surface having a reflection phase of zero in multiple frequency bands and a method of making same. The high impedance surface includes a ground plane; a plurality of conductive plates disposed in a first array spaced a distance from the ground plane, thedistance being less than a wavelength of the radio frequency beam, said first array having a first lattice constant; and a plurality of conductive elements associated with said plurality of conductive plates, said plurality of conductive elements defining a second array, said second array having a lattice constant greater than the lattice constant of the first array.

    Vivaldi cloverleaf antenna
    24.
    发明专利
    Vivaldi cloverleaf antenna 未知

    公开(公告)号：AU3076401A

    公开(公告)日：2001-09-24

    申请号：AU3076401

    申请日：2000-12-22

    Applicant: HRL LAB LLC

    Inventor： SIEVENPIPER DANIEL

    IPC: H01Q21/26 ,  H01Q1/24 ,  H01Q1/28 ,  H01Q1/32 ,  H01Q9/40 ,  H01Q13/02 ,  H01Q13/08 ,  H01Q13/10

    Abstract: An antenna for receiving and/or transmitting a radio frequency wave. The antenna includes a plurality of flared notch antennas disposed adjacent to each other and arranged such that their directions of maximum gain point in different directions, each of the flared notch antennas being associated with a pair of radio frequency radiating elements and wherein each radio frequency radiating element serves as a radio frequency radiating element for two different flared notch antennas and has a gap therein having a length equal to approximately one quarter wavelength of the radio frequency wave.

    Crossed slot cavity antenna
    28.
    发明专利
    Crossed slot cavity antenna 未知

    公开(公告)号：GB2391712A

    公开(公告)日：2004-02-11

    申请号：GB0323588

    申请日：2002-03-22

    Applicant: HRL LAB LLC

    Inventor： SIEVENPIPER DANIEL

    IPC: H01Q1/42 ,  H01Q13/10 ,  H01Q13/18 ,  H01Q21/24 ,  H01Q23/00 ,  H01Q1/32

    Abstract: A crossed slot antenna, a method of fabricating same and a method of designing same. The antenna includes a cavity structure having conductive material on opposed surfaces thereof; and two slots in said conductive material, the slots having slightly different lengths and intersecting each other at or close to a 90 degree angle.

    TUNABLE FREQUENCY SELECTIVE SURFACE
    30.
    发明申请
    TUNABLE FREQUENCY SELECTIVE SURFACE 审中-公开
    可选频率选择表面

    公开(公告)号：WO2007123504A8

    公开(公告)日：2008-09-18

    申请号：PCT/US2006006025

    申请日：2006-04-20

    Applicant: HRL LAB LLC ,  SIEVENPIPER DANIEL

    Inventor： SIEVENPIPER DANIEL

    IPC: H01Q1/24

    CPC classification number: H01Q1/425 ,  H01Q3/44 ,  H01Q15/002 ,  H01Q19/06

    Abstract: An apparatus and methods for operating a frequency selective surface are disclosed. The apparatus can be tuned to an on/off state or transmit/reflect electromagnetic energy in any frequency. The methods disclosed teach how to tune the frequency selective surface to an on/off state or transmit/reflect electromagnetic energy in any frequency.

    Abstract translation: 公开了一种用于操作频率选择表面的装置和方法。 该装置可以被调谐到开/关状态或者以任何频率发射/反射电磁能。 所公开的方法教导了如何将频率选择性表面调谐到开/关状态或者以任何频率发射/反射电磁能。

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