In this paper, an exact closed-form solution is presented for free vibration analysis of Euler-Bernoulli conical and tapered beams carrying any desired number of attached masses. The concentrated masses are modeled by Dirac’s delta functions which creates no need for implementation of compatibility conditions. The proposed technique explicitly provides frequency equation and corresponding mode ...

In this paper, a 4.2–7.2 GHz (52.6%) beam-steering microstrip antenna was proposed. The proposed consists of three tapered slots and feeds. radiation directions the on plane are independent each other, feeds correspond to structures. Symmetry isolation trenches introduced improve between different ports. Radiation pattern simulation measurement show horizontal beam steering at sampled frequenci...

For the CLIC two-beam scheme, a high-current, longpulse drive beam is required for RF power generation. Taking advantage of the 3 GHz klystrons available at the LEP injector once LEP stops, a 180 MeV electron accelerator is being constructed for a nominal beam current of 3.5 A and 1.5 Ps pulse length. The high current requires highly effective suppression of dipolar wakes. Two concepts are inve...