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    Compact vertical bias networks for LTCC millimeter wave circuits
    (IEEE Operations Center, 2006)
    Baras, Torben
    ;
    Jacob, Arne
    A novel, vertical filter structure for millimeter wave LTCC circuits is presented. The design is based on a circular shielded plate arrangement with embedded inductor loops. Finite element simulations are consulted in order to study the filter response depending on various geometric parameters. Measurements on 8-layer LTCC test vehicles confirm the software predicted performance for frequencies up to 35 GHz. © 2006 EuMA.
    Publicationtype: Conference Paper
      44
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    Full wave analysis of composite absorbing layers
    (IEEE Operations Center, 2006)
    Meiners, Christian
    ;
    Jacob, Arne
    A two layer absorbing structure is investigated. It is built from small lossy dielectric spheres. Their density is adjusted such that the wave Impedance increases linearly. The different layers are further loaded with metallic helices. These give high losses at resonance. A scattering approach based on the dipole-polarizabilities of the helices and the Mie-solution of the dielectric spheres is compared to the Maxwell-Garnett theory. It is shown that due to strong mutual coupling some differences arise. These are assessed in view of design considerations for such materials. © 2006 EuMA.
    Publicationtype: Conference Paper
      46
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    Experimental investigation of an external calibration scheme for 30 GHz circularly polarized DBF transmit antenna arrays
    (2006-09)
    Pawlak, Holger
    ;
    Charaspreedalarp, Adisak
    ;
    Jacob, Arne F.
    This paper deals with an external calibration scheme for planar DBF transmit antenna arrays. Amplitude and phase of the individual array elements are determined by several external probe antennas located at the edges of the array. Focus of this paper is on the measurement setup and first experimental results of the calibration scheme applied to an elementary 2×2 transmit module operating at 30 GHz. © 2006 EuMA.
    Publicationtype: Conference Paper
      48