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Sökning: LAR1:lu > Sjöberg Daniel > Lunds universitet > Wernersson Lars Erik

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  • Ohlsson, Lars, et al. (författare)
  • A transmission line model for co-designed slot-coupled dielectric resonator antennas
  • 2017
  • Ingår i: European Microwave Week 2016: "Microwaves Everywhere", EuMW 2016 - Conference Proceedings; 46th European Microwave Conference, EuMC 2016. - Institute of Electrical and Electronics Engineers Inc.. - 9782874870439 ; s. 333-336
  • Konferensbidrag (refereegranskat)abstract
    • Co-design of monolithically-integrated millimetre-wave front-ends and antennas is alleviated by accurate device models. In this paper, a novel transmission line model for slotcoupled dielectric resonator antennas is proposed and verified. It describes distributed interaction between the coupling-structure and the radiating dielectric body of the antenna. This model thereby provides a simplistic and intuitive description of the main radiation mechanism. It fits with excellently to numerical full-wave simulation results, both in terms of input characteristics and radiation efficiency. Furthermore, the radiated signal fidelity predicted by the model is found in line with experimental results from a co-designed millimetre-wave wavelet transmitter. This antenna model promise further development into a generic scalable model that will reduce the need for iterative simulations.
  • Ohlsson, Lars, et al. (författare)
  • Admittance Matching of 60 GHz Rectangular Dielectric Resonator Antennas for Integrated Impulse Radio
  • 2010
  • Ingår i: [Host publication title missing]. - IEEE--Institute of Electrical and Electronics Engineers Inc.. ; s. 253-256
  • Konferensbidrag (refereegranskat)abstract
    • Methods to achieve admittance matching of rectangular dielectric resonator antennas intended for 60~GHz impulse radio are reported. The motivation is to find a suitable antenna that may be integrated in the V-band gated tunnel diode wavelet generator, replacing its tank circuit and forming a low complexity transmitter. Probed one- and two-port scattering parameter measurements have been performed to characterise the fabricated antennas. Changing the feed structure from a tapered dipole to an offset fed and tapered slot, a change from capacitive to inductive characteristics is observed, and the matching to the gated tunnel diode is improved. Deembedded admittance resonance frequencies of fabricated antennas were found at 53.6 and 52.2~GHz for dipole and slot fed antennas, respectively. Characterising the transmission link between dipole fed antennas, a maximum antenna gain of 10.5~dBi and a 3~dB power bandwidth of 1.5~GHz were found at 53.3~GHz.
  • Ohlsson, Lars, et al. (författare)
  • Codesign of Compact III-V Millimeter-Wave Wavelet Transmitters with On-Chip Antennas
  • 2018
  • Ingår i: IEEE Transactions on Microwave Theory and Techniques. - IEEE--Institute of Electrical and Electronics Engineers Inc.. - 0018-9480. ; 66:1, s. 273-279
  • Tidskriftsartikel (refereegranskat)abstract
    • Monolithically integrated millimeter-wave wavelet transmitters are presented and analyzed in this paper. Two designs that include compact dielectric resonator antennas with either inductive or self-resonant input characteristics are compared. The efficient transmitter front-end core consists of a resonant tunneling diode oscillator that is quenchable by a transistor switch. A physical diode model is used to formulate small-signal matching criteria and study codesign conditions. Fabricated transmitters provide up to 11-dBm equivalent isotropically radiated power in down to 80-ps wideband wavelets at V-band carrier frequencies. Analyses of the radiated waveform envelope and time-frequency characteristics give insight in the circuit operation.
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  • Resultat 1-5 av 5
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Ärlelid, Mats, (2)
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