Journal: IEEE Transactions on Microwave Theory and Techniques

Abbreviation

IEEE Trans. Microwave Theor. Tech.

Publisher

IEEE

Journal Volumes

ISSN

0018-9480
1557-9670

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Publications 1 - 10 of 68
  • Integrated Active Pulsed Reflector for an Indoor Local Positioning System
    Item type: Journal Article
    Wehrli, Silvan; Gierlich, Roland; Hüttner, Jörg; et al. (2010)
    IEEE Transactions on Microwave Theory and Techniques
  • Spectrum of corrugated and periodically loaded waveguides from classical matrix eigenvalues
    Item type: Journal Article
    Amari, Smain; Vahldieck, Rüdiger; Bornemann, Jens; et al. (2000)
    IEEE Transactions on Microwave Theory and Techniques
    The paper presents a rigorous full-wave analysis of propagation in corrugated and periodically loaded waveguides. The propagation constants are determined from the classical eigenvalues of a canonical matrix eigenvalue problem instead of a determinant. The entries of the matrix are computed only once per frequency point. The entire k/sub 0/-/spl beta/ diagram of a corrugated circular waveguide, a circular waveguide periodically loaded with dielectric disks, and a rectangular waveguide periodically loaded with capacitive irises are determined and compared with results of other researchers. Excellent agreement is documented in each case.
  • A 23-37-GHz Autonomous 2D MIMO Receiver Array with Rapid Full-FoV Spatial Filtering for Unknown Interference Suppression
    Item type: Journal Article
    Huang, Tzu-Yuan; Lin, Boce; Ahmed, Amr; et al. (2023)
    IEEE Transactions on Microwave Theory and Techniques
    Millimeter-wave (mm-Wave) receiver (RX) array systems are widely employed to address a plethora of applications for telecommunication, radar sensing, localization, imaging, and weather monitoring. Many future mm-Wave arrays need to operate in increasingly dynamic and mobile scenarios with complicated electromagnetic (EM) environments. With their wide deployment, they are more likely to be exposed to strong interferences with unknown angle-of-arrival (AoA), frequency, and modulation schemes. In this work, we propose and implement a 23–37-GHz autonomous 2-D multiple-input and multiple-output (MIMO) RX array system with rapid full field-of-view (FoV) spatial filtering and beamforming to manage interferences and signals from unknown direction-of-arrival (DoA). The implemented RX array system architecture provides multiple deep spatial notches to relax the dynamic range requirement of downstream analog-to-digital converter (ADC) circuits and is also extendable to a larger 2-D array. The implemented RX array system includes a broadband mm-Wave frontend and two autonomous spatial filter stages (ASFs) in cascade without losing MIMO capability. A prototype is demonstrated in a 45-nm RF CMOS silicon on insulator (SOI) process. The broadband mm-Wave frontend achieves $S_{11}$ $<$ $-$ 10 dB from 26 to 36 GHz with 23–37-GHz 3-dB bandwidth and 4.9-dB minimum noise figure (NF) within the operating band. Our autonomous MIMO array demonstrates $>-$ 2.4 dB normalized array factor over full FoV and spatial notch with $>$ 27.1 dB cancellation. With two ASFs stages in cascade, we demonstrate two individual spatial notches, each with $>$ 28.3 dB spatial cancellation on unknown blockers. Furthermore, co-channel wideband modulated blockers are autonomously rejected, and the desired signal is successfully demodulated for 2.4-Gb/s 64 QAM (highest speed) with $-$ 22.02-dB error vector magnitude (EVM) rms (25% interference/signal co-channel overlap), for 0.6-Gb/s 64 QAM with $-$ 26.32-dB EVMrms (50% co-channel overlap) and for 1.2-Gb/s 64 QAM with $-$ 26.16-dB EVMrms (25% co-channel overlap).
  • Optimal Matched Rectifying Surface for Space Solar Power Satellite Application
    Item type: Journal Article
    Wang, Rong; Ye, Dexin; Dong, Shiwei; et al. (2014)
    IEEE Transactions on Microwave Theory and Techniques
  • A Stable Bayesian Vector Network Analyzer Calibration Algorithm
    Item type: Journal Article
    Hoffmann, Johannes; Leuchtmann, Pascal; Ruefenacht, Juerg; et al. (2009)
    IEEE Transactions on Microwave Theory and Techniques
  • High peak SAR exposure unit with tight exposure and environmental control for in vitro experiments at 1800 MHz
    Item type: Journal Article
    Schuderer, J.; Samaras, T.; Oesch, W.; et al. (2004)
    IEEE Transactions on Microwave Theory and Techniques
  • Noncontact Measurement of Complex Permittivity Based on the Principle of Mid-Range Wireless Power Transfer
    Item type: Journal Article
    Shen, Fazhong; Salamin, Yannick; Dong, Jing; et al. (2014)
    IEEE Transactions on Microwave Theory and Techniques
  • Uniaxial and Radial Anisotropy Models for Finite-Volume Maxwellian Absorber
    Item type: Journal Article
    Sankaran, Krishnaswamy; Fumeaux, Christophe; Vahldieck, Rüdiger (2006)
    IEEE Transactions on Microwave Theory and Techniques
  • On the application of model-order reduction in the fast and reliable optimization of microwave filters and diplexers
    Item type: Journal Article
    Krohne, Klaus; Vahldieck, Rüdiger (2004)
    IEEE Transactions on Microwave Theory and Techniques
  • A Transformer-Based Poly-Phase Network for Ultra-Broadband Quadrature Signal Generation
    Item type: Journal Article
    Park, Jong Seok; Wang, Hua (2015)
    IEEE Transactions on Microwave Theory and Techniques
    This paper presents a transformer-based poly-phase network to generate fully differential quadrature signals with low loss, compact area, and high-precision magnitude and phase balance over an ultra-wide bandwidth. A fully differential high-coupling 8-port folded transformer-based quadrature hybrid serves as the basic building block for the poly-phase unit stage to achieve significant size reduction and low loss. Multiple poly-phase unit stages can be cascaded to form the multistage poly-phase network to substantially extend the quadrature signal generation bandwidth. The designs of the high-coupling transformer-based quadrature hybrid, the poly-phase unit stage, and the multistage transformer-based poly-phase network are presented with the closed-form design equations in this paper. As a proof-of-concept design, a 3-stage transformer-based poly-phase network is implemented in a standard 65 nm bulk CMOS process with a core area of 772 μm × 925 μm. Measurement results of this poly-phase network over 3 independent samples demonstrate that the output In-Phase and Quadrature (I/Q) magnitude mismatch is less than 1 dB from 2.8 GHz to 21.8 GHz with a passive loss of 3.65 dB at 6.4 GHz. The measured output I/Q phase error is less than 10 ° from 0.1 GHz to 24 GHz. The effective Image Rejection Ratio (IRR) based on the measured I/Q balancing is more than 30 dB from 3.7 GHz to 22.5 GHz. The 3-stage transformer-based poly-phase network design achieves high-quality quadrature signal generation over a first-ever one-decade bandwidth together with low-loss and compact area.
Publications 1 - 10 of 68