Follow the links to read the full papers in the IET Digital Library.
A fluid solution
Researchers in the UK and Germany have used the electrical properties of liquid crystals to create an electronically scanned Rotman lens phased array antenna that works at microwave frequencies. The liquid crystals produce electronic beam scanning, providing very wide coverage - necessary for target acquisition - without physically moving the antenna.
A multichannel spectral surface plasmon resonance sensor module has been designed and fabricated by researchers in the US. Their design provides a time-divison scanning capability, which is achieved by altering the optical media rather than conventional mechanical movements, so SPR sensors can now be simpler and miniaturised.
Remote and scattered
Mobility coupling effects due to remote Coulomb scattering have been demonstrated by researchers in France for the first time in fully depleted SOI CMOS devices, subjected to front and back interface electrical degradation. The results could play an increasing role in associated devices by further limiting the transport properties and reinforcing the static and dynamic interface coupling.
Rings of power
A dual-modulus prescaler based on heterodyne phase locking technique is presented in work from China and Singapore. Injection locked ring oscillators are used in place of VCOs and significant reduction in settling time and low power consumption are achieved. The 40nm CMOS prototype operates at 6.3 GHz and consumes 0.6 mW from a 1.1V supply.
A high-performance bulk silicon interdigital capacitive temperature microsensor based on graphene oxide has been created in work from China. Fabricated using a post-CMOS MEMS process the sensor operates in the range -70°C to 40°C, which is suitable for use in radiosonde balloon low temperature measurements.