This article presents a novel application of the time-gating technique to the field of propagation channel study. The time-gating technique is well known in the field of antenna measurement and it is used to eliminate reflected components in outdoor measurements or anechoic chambers. In this article, we present a new measurement configuration for shielded chambers that allows to configure different propagation scenarios. In this configuration, the chamber is covered in one part with absorbers and in the other without absorbers (in order to generate reflected components). Applying the time-gating technique, we can modify, adjust and tune the reflections that a certain propagation environment has. This yields a relative control of the propagation environment in both far field and near field regions and allows to quantify the spectral efficiency and signal correlation that MIMO systems would display operating in those propagation environments.INDEX TERMS Anechoic chamber, impulse response, MIMO, recreate scenarios, reverberation chamber, time-gating.

Multiple communication and identification systems are taking advantage of inkjet‐printing techniques for the production of flexible, low‐cost, and lightweight printed radiating elements. In this paper, we bring the advantages of inkjet printing to the design of efficient and low‐cost wideband radio‐frequency (RF) energy harvesters. We present the design, manufacturing, and measurement of two inkjet‐printed ultrawideband monopole antennas. Both elliptical and circular monopoles are printed with a silver conductive ink on a thin polyethylene terephthalate film that lays on a foam substrate. Measurements show that the antennas operate efficiently from 0.6 to 8 GHz, covering the most relevant power contributions coming from the radio spectrum. In addition, the antennas show omnidirectional characteristics, highly desirable for broad spatial coverage in RF energy harvesting.

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