In brief

Abstract

PAGE 752 With security in free-space optical communications mounting in importance, a novel 2D encryption scheme for such channels has been proposed which uses two spatial patterns as encryption keys. The team from Japan, including one Electronics Letters Associate Editor, hopes the system will reduce the risk of unauthorised third-party intrusion. PAGE 723 Samsung Electronics researchers present a dual-layer substrate integrated waveguide cavity filtering antenna with a controllable radiation band and two radiation nulls. The designed and fabricated prototype exhibits good filtering performance, with a radiation band that can be independently controlled without affecting the radiation nulls. Simulated intensity results on varying patterns. PAGE 756 Dielectric metasurfaces composed of arrays of subwavelength structures can manipulate the properties of electromagnetic waves. These effects have been utilised by researchers from China to produce a metasurface grating with blazing behaviour which imitates saw-tooth gratings for use in an imaging spectrometer. Electric field distribution on the ground plane. PAGE 737 A team of researchers from China outline a finite element-based domain decomposition method with a novel transmission condition for electromagnetic (or other type of fields) computation. It operates by splitting an original large domain into several non-overlapping smaller sub-domains and is verified with calculations on 3D electro- and magnetostatic models. Schematic of the designed Metamaterial Blazed Grating (MBG). PAGE 749 A low-cost and passive medical examination solution based on near field communication technology has been proposed by Chinese researchers. The presented time-sharing control energy accumulation method is extended to a medical detection system temperature measuring prototype and demonstrates that this method can be used in conjunction with a smart phone for portable healthcare monitoring applications. Permanent magnet structure and computational model. Load time variation with charge time with different capacitors.