Periodic Reporting for period 1 - SCATTERERID (Analysis and synthesis of wideband scattered signals from finite-size targets – aspect-independent RF analog footprint)
Reporting period: 2018-09-01 to 2020-02-29
For instance, totally imprinted CBRAM RF switches have been achieved using transfer printing techniques. One of the most relevant results about this topic is that we are now able to control the resistance of these switches by controlling the tension / current applied to the CBRAM cell. We also have observed some nonlinear behaviors, and we are now trying to exploit these phenomena that could be very interesting for the communicating part of the project. Regarding WP2, we have introduced a totally planar resonant scatterer with roll invariant cross polarization. This work has been first driven from a theoretical point of view, and then an original implementation has been proposed. The characterization of this device shows good agreement with the theory and the simulations. About WP3, a Chipless RFID label with identification and touch sensing capabilities has been introduced.
A test bench has been built and automated to perform chipless tag characterization. With this dedicated bench designed and based on the Starlab platform, it is now possible to measure the RCS of objects in 3D.
In addition, members of the ScattererID project participated in several national and international conferences. A significant number of papers (more than 10) have been submitted to international scientific journals. Two workshops with 3 invited guests have also been organized.
- A novel methodology for achieving a variable resistance for CBRAM cells for microwave applications has been introduced.
- Electronically rewritable chipless RFID tags have been designed, fabricated through thermal transfer printing on flexible PET substrates and characterized.
- A smart and robust chipless RFID label with identification and touch sensing capabilities is being developed. First results are encouraging.
- About sensing, for the first time we have shown that contactless characterization of thermal expansion coefficient (CTE) of metals can be realized based on free-space RF measurements. This concept is now used to convert chipless tags to temperature sensors.
- Last but not least, we have introduced the first planar resonant scatterer with roll invariant cross polarization. Based on the introduced theory related to this concept, new ideas have emerged, and we continue to work on the implementation of some of them.
Expected results until the end of the project are still the ones described in the Annex 1 to the Grant Agreement (Description of the Action).