A compact tunable directional coupler with continuously tuned differential phase... To realize the variable-length lines, a novel concept of tunable phase shifting unit, which includes a pair of inductor-varactor loaded coupled lines, is proposed....
Fragile states, commodity booms and export performance: an analysis of the sub-saharan african case... Specifically, we investigate the price-elasticity response of African ex-porters in the lightof dramatically shifting unit prices....
A high-power microwave reflectarray antenna based on perforated dielectric substrate... Variable diameter air-filled holes through a host dielectric material are exploited as the phase-shifting unit cells because of the advantage of higher power handling capacity....
A phased array antenna employing reconfigurable defected microstrip structure (rdms)... In this paper, a compact phase-shifting unit based on reconfigurable defected microstrip structure (RDMS) is used to provide controllable phase shift for a 1×4 phased array antenna....
