In brief

Abstract

PAGE 1146 A team working in Australia have achieved wideband gain enhancement of a slot antenna by placing a quarter-wavelength-thick unprinted dielectric slab above it. In addition to having a high gain with a large bandwidth, the antenna is easy to fabricate and has a low vertical profile, with a total height of 0.593λ0. PAGE 1140 The specific differential attenuation reflectivity, phase and reflectivity exhibited by large rand drops and melting hail have been computed and studied by a team from the USA. The work addresses the ‘hot spots’ in C-band polarimetric radar observations in storms. The measured peak gain is 16.95 dBi and the 3dB gain bandwidth is 16.25% PAGE 1172 Gerald Küstler, working in Germany, reports on a simultaneous inline triple levitation system using permanent magnets. The system allows for the inline levitation of three different bodies without energy input or feedback control, and could find application in seismometers or accelerometers after further study. Melting hailstones take the form of a water torus surrounding an ice core PAGE 1170 A team from the USA and Korea build on their previous work by investigating surface plasmon resonant splitting and merging due to infrared incidence through a thermal imaging lens. The team analyse the transmission of a plasmonic perforated gold film (PGF) against the incident light in both polar and azimuth angles. The future challenge is to characterise the system response behaviour PAGE 1132 A team working in China have achieved adjustable electromagnetically induced transparency (EIT) using a slotted circle ring structure. EIT can create a narrow transmission window in a wide absorption band, and such structures that create this effect can be used as angle modulators or state sensors. The sample was fabricated with a PGF on a semi-insulating GaAs substrate The proposed structure can also be used in frequency selective surface design