In brief

Abstract

PAGE 1325 A passive device presented by a team from RWTH Aachen University, Germany, will enable an increase in the efficiency of solar panels. By integrating antennas with solar panels, the team were able to adjust the angle of the panel as well as the antenna autonomously. This integration allows more effective power collection without comprising the radio link. PAGE 1353 In a letter from the Graduate School of Advanced Sciences of Matter, Japan, the performance of a 300 GHz CMOS transmitter is reported. The frequency band above 275 GHz currently remains unallocated, as transmission at those frequencies has been difficult to realise. The team's letter shows that this spectrum allocation is now certainly worthy of further discussion. The proposed device operates up to a rotation of ±45° PAGE 1342 An X-band gallium-nitride high electron mobility transistor transformer-based Doherty power amplifier (TBD PA) module with a phase lineariser has been presented. This was developed by a team from Seoul National University, Korea, to overcome the difficulties faced in developing a millimetre-wave PA that covers wideband modulation signals. The CMOS transmitter turns out to be comparable in performance to other 0.3 THz or higher systems PAGE 1286 A letter reporting collaborative work undertaken by Beijing University of Posts and Telecommunications, China, and Queen Mary University, London, United Kingdom, clearly demonstrates that low cross-polarisation in a tri-reflector compact antenna test range (CATR) can be achieved with appropriate antenna geometry. It also shows that strategies for cross-polarisation control in the shaping procedure can be avoided. A future communication standard such as fifth generation is expected to be realised at frequency-band of millimetre-waves PAGE 1290 A team from the Indian Institute of Information Technology present a method of pattern retrieval for computed tomography images. One way to analyse an image is to compare it with similar images from a database, and the team used dissimilarities between the images to improve comparison. Novel antenna geometry can be used to overcome the problems faced by CATRs Images from computed tomography are among the most important source of information for medical analysis