Browsing by Subject "Filter structures"

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    H ∞-filter based target tracking under time delayed measurements
    (IEEE, 2012) Ateş, Ezgi; Özbay, Hitay
    In this paper a new filter structure is proposed for the H ∞ estimation under delayed measurements for continuous time processes. As an example, target tracking problem is considered and results obtained from the classical H 2-optimal and the proposed H ∞-optimal filters are compared. © 2012 IEEE.
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    Novel SIW based interdigital bandpass filter with harmonic suppression
    (IEEE, 2014) Kurudere, S.; Ertürk, Vakur B.
    A novel configuration for substrate integrated waveguide (SIW) based bandpass filter with interdigital type resonators is presented. In the proposed structure, interdigital type resonators consisting of vias and circular caps at top of them are combined into a bowtie SIW structure. SIW is fed by a tapered microstrip line transition providing low loss and good matching. In order to improve harmonic suppression performance of the filter, the dumbbell shaped defected ground structure (DGS) is etched to the ground side of the microstrip line feeding section. The proposed filter structure is put in a conducting box in order to improve attenuation levels at the band edges and prevent radiation to the outside. The prototype is designed at 9 GHz center frequency with 500 MHz bandwidth, analyzed and fabricated for verification. The measurement results are in good agreement with the simulations, and the filter exhibits more than 30 dB harmonic suppression.