A low cost, dual band antenna has been proposed and studied in this paper. The antenna consists of two elementsa T-shaped element and an F-shaped element. A microstrip feed line with a characteristic impedance of 50? has been used to feed the T-element which is responsible for the generation of the higher band of operation. The F-element is placed on the other side of the dielectric and is coup...

We report on results from high-energy spectroscopic measurements on CeFe2, a system of particular interest due to its anomalous ferromagnetism with an unusually low Curie temperature and small magnetization compared to the other rare-earth iron Laves phase compounds. Our experimental results, obtained using core-level and valence-band photoemission, inverse photoemission and soft x-ray absorpti...

The electronic structure of f-electron systems is calculated with the selfinteraction-corrected local-spin-density (LSD) approximation. This scheme allows for a splitting of the f-electron manifold into an integral number of localized electrons and self-consistently determined fractional number of band electrons. Therefore, in comparison with the LSD approximation, where all f states are pinned...

Band dispersions and Fermi surfaces of the three-dimensional Mott-Hubbard system SrVO3 are directly observed by angle-resolved photoemission spectroscopy. An observed spectral weight distribution near the Fermi level (E(F)) shows cylindrical Fermi surfaces as predicted by band-structure calculations. By comparing the experimental results with calculated surface electronic structures, we conclud...

A tunable dual-band inverted F antenna (IFA) is presented in this paper. By placing a LC resonator on the radiating arm, dual-band characteristic is achieved. Especially, the capacitor in the resonator is a tunable thin-film BST capacitor, which has a 3.3:1 tuning ratio. The capacitance of the BST capacitors can be tuned by an external DC bias voltage. By varying the capacitance, both the lower...

The two-dimensional, free-electron-like band structure of noble metal surfaces can be radically transformed by appropriate nanostructuration. A case example is the triangular dislocation network that characterizes the epitaxial Ag/Cu(111) system, which exhibits a highly featured band topology with a full band gap above E(F) and a hole-pocket-like Fermi surface. Here we show that controlled dopi...

F1P1 V F 8 6.2 8.8 390 2 LM 1:1 ND CDA II band 3 Y462C/Y462C F2P1 V M 9 5.5 12.5 384 <0.2 LM 1:4 ND CDA II band 3 Y462C/Y462C F3P1 V M 6 10.8 6.4 368 0.4 LM 1:2 POS CDA II band 3 Y462C/Y462C F4P1 V M < 1 7.5 4.1 311 2.5 LM, EM 1:5 ND CDA II band 3 Y462C/Y462C F4P2 V M < 1 7.1 4.1 282 3.3 LM, EM 1:3 ND ND Y462C/Y462C F5P1a V M 21 8.4 3.2 301 2.6 LM, EM 1:3 ND CDA II band 3 Y462C/Y462C F6P1a V F ...