To date, CubeSat radars and imagers have been limited to operations beyond S-band due the challenges associated with design of wideband, compact, low-frequency antennas. Concurrently, frequencies at VHF/UHF bands can image through clouds foliage, are very attractive for ice, water biomass sensing. There is thus a need develop wideband antennas that operate which low cost, light-weight, packable...

Within the context of modern digital phased array (DPA) radios, differential Radio Frequency (RF) front-ends provide much greater immunity to noise and distortion by suppressing second order harmonics. Recent advancements in RF offer high dynamic range, linearity, low transceiver chain. However, a major roadblock fully systems is presence common-mode resonances. In this article, we present nove...

An origami-based Tightly Coupled Dipole Array (TCDA) is proposed for small satellite applications. The array formed by a two-layered structure using rigid and flexible substrates to enable accordion-like folding. TCDA operates across 0.4-2.4 GHz with VSWR < 3 at broadside 0.6-2.4 when scanning down 45∘ in the E-, D-, H-plane. 8 × prototype was fabricated Kapton Polyimide FR4 tested verify bandw...

NBO analysis, hybrid density functional theory (B3LYP/6-311+G**) and ab initio molecular orbital (HF/6-311+G**) based methods were used to study the anomeric effects (AE), electrostatic interactions, dipole-dipole interactions and steric repulsion effects on the conformational properties of 2-methoxy- (1), 2-methylthio- (2), 2-methylseleno- (3), 2-fluoro- (4), 2-chloro- (5) and 2-bromocyclohexa...

The recoil of atoms in arrays due to the emission or absorption photons is studied for subwavelength interatomic spacing. array interact with each other through collective dipole-dipole interactions and incident laser field low-intensity limit. Shining uniform light on gives rise patterns excitation array. They arise interference different eigenmodes excitation. relation between decay dynamics ...