T. H. I. Jaakola

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In the grocery business online start-ups, e-grocers, have in the last few years developed new business models to challenge the traditional bricks-and-mortar supermarkets. However, many of the big players in the e-grocery business, such as Peapod and Webvan in the USA, still operate in the red. They have financed rapid growth by collecting hundreds of(More)
This paper reports on research on two generic shielded vertical transitions in low-temperature cofired ceramic technology. These interconnections are simulated and optimized by three-dimensional electromagnetic simulations. The first circuit, a coplanar waveguide (CPW) or microstrip-to-stripline transition, presents great experimental performances from dc(More)
We propose a new low-temperature co-fired ceramic (LTCC) U-shaped resonator. The advantages of LTCC technology are employed to design this three-dimensional (3-D) lambda<sub>g</sub>/2 resonator. The latter is modeled and optimized by 3-D electromagnetic simulations and is validated by experimental results. In order to validate the coupling between these(More)
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