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Dual-polarized architecture for channel sounding at 60 GHz with digital/analog phase control based on 0.25µm SiGe BiCMOS and LTCC technology

Dual-polarized architecture for channel sounding at 60 GHz with digital/analog phase control based on 0.25µm SiGe BiCMOS and LTCC technology,Alexis Pa

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Dual-polarized architecture for channel sounding at 60 GHz with digital/analog phase control based on 0.25µm SiGe BiCMOS and LTCC technology   (Citations: 2)
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Channel sounders that are used to investigate 60 GHz multipath propagation and multi-user access techniques under time-variant shadowing environments require challenging technical characteristics, e.g., ultra-wideband (UWB) real-time operation (7 to 9 GHz bandwidth), multiple antennas, and high dynamic range. In addition, dual-polarization and phase adjustment have become in a need not only for full channel characterization extracting polarimetric information, but also for consumer user cases under polarization mismatch and misalignment. This paper presents a novel 60 GHz UWB dual- polarized (DP) air interface architecture (AIA) incorporating 360° phase shifters on chip fulfilling the previous requirements. The AIA is based on a 0.25μm SiGe BiCMOS chip-set, and low- temperature co-fired ceramics (LTCC) technology for antennas and packaging. Measurement results using our first prototype are addressed in this paper. The phase adjustment capability is verified and also its usability for cross-polarized real-time measurements including disturbances due to human activity.
Published in 2011.
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    • ...We specified requirements for their integration within a novel channel sounding architecture [12], including high isolation between the RF and IF ports and good heat dissipation...
    • ...The main focus of the designs described in this paper is the coherent balanced dual-channel/dualpolarized channel sounding architecture described in [12]...
    • ...We designed the first DP frontend version (see Fig.1 left) based on SiGe technology for active components, with an IF range from 3.5 GHz to 10.5 GHz and an RF range from 59.5 to 66.7 GHz using a local oscillator (LO) at 56 GHz [12]...
    • ...Thus, we designed two solutions based on LTCC which provided the bandwidth (9 GHz), met the space requirements and provided the required RF power for our dual-polarized concept [12]...
    • ...The results of the measurements are discussed in [12]...

    Robert Muller, et al. 60 GHz ultrawideband hybrid-integrated dual-polarized front-end in LTC...

    • ...While acquiring data for both polarizations sequentially is possible, in general, a simultaneous approach is preferable, although at the expense of higher frontend complexity [2]...
    • ...ISM-band, more specifically 59.5 to 66.5 GHz [2]...
    • ...The approach proposed in [2] incorporates adjustable phase shifters, to facilitate switching between LHCP, RHCP, and linear polarization...

    Frank Wollenschlager, et al. A compact dual-polarized wideband patch antenna array for the unlicens...

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