A 150 GHz amplifier in digital 65 nm CMOS process is presented. Matching loss is reduced and bandwidth extended by simplistic topology: no dc-block capacitor, shunt-only tuning and radial stubs for ac ground. Dummy-prefilled microstrip lines, with explicit yet efficient dummy modeling, are used as a compact, density-rule compliant matching element. Transistor layout with parallel gate feed yiel...

This paper presents a low-cost Ultra Wideband (UWB) pulse generator that can vary the pulse duration digitally by using a Step Recovery Diode (SRD), microstrip transmission lines and PIN diodes. First, a sharp edge is generated by using a SRD circuitry. Then a pulse is formed from the sharp edge through the use of transmission lines and the PIN diodes. Based on the number of transmission lines ...

In this paper, a 77 GHz microstrip dipole antenna is integrated on a layered 11.4 μm SiO2 and a silicon substrate with thickness of 670 μm. The unbalanced microstrip line is balanced by using a lumped LC circuit balun to feed both of the dipole arms. To decrease the substrate loss and hence increase the antenna gain, Localized Backside Etch (LBE) module offered by IHP is utilized to etch the ar...

Member of the Graduiertenkolleg (DFG GK-GRK 410/1) In the new GSI project stochastic cooling of secondary particles will be used. The efficiency of stochastic cooling is mainly influenced by the coupling of the electrodes to the beam. This performance has to be investigated and optimised. The investigation is done via a three dimensional numerical electromagnetic field analysis with use of the ...

184 LLE Review, Volume 72 Current target designs for laser-driven inertially confined fusion experiments require that the laser drive pulse be tailored to the target, i.e., that the pulse have some temporal shape other than Gaussian. On the 60-beam OMEGA1 laser system this is accomplished by placing an electro-optic modulator at the input of the system, which is driven by an electrical pulse fr...

A simple and compact microstrip line -fed ultrawideband planar monopole antenna with single band-notch characteristics is presented. Wide impedance bandwidth is achieved by inserting two rectangular slots on both sides of the microstrip feed line on the ground plane. Band notching is achieved by embedding a half wavelength C shaped slot on the radiator. The antenna is investigated numerically a...

An enhanced particle swarm optimization (EPSO) algorithm is proposed. To improve convergence accuracy and velocity, we introduce a quadratic interpolation method and perturbation to personal best particles in EPSO. Then, a design procedure based on the EPSO is proposed for the design and optimization of equal split broadband microstrip Wilkinson power dividers (MWPDs). A set of numerical exampl...

A Microstrip Patch Antenna is a type of radio antenna with a low profile, which can be mounted on a flat surface. It is a narrowband, wide-beam fed antenna fabricated by etching the antenna element pattern in metal trace bonded to an insulating dielectric substrate such as a printed circuit board with a continuous metal layer bonded to the opposite side of the substrate which forms a ground pla...

A novel dual-band microstrip antenna for an internal notebook antenna for WLAN operation is presented. The antenna has a simple structure consisting of a spiral strip. The proposed antenna has a low profile and can easily be fed by using a 50 Ω microstrip line. It is believed that the size of the antenna is about the smallest among the existing internal laptop antennas for 2.4/5.8GHz WLAN opera...

Abstract: In this microstrip antenna design multi frequencies are used. Here working frequencies are 1.9 GHz and 2.0 GHz. Rectangular patch shape technique is used for designing this microstrip antenna. In our model electric field lines, conductance and input resistance have obtained by transmission line model whereas charge distribution, directivity and gains have brought by cavity model of re...