The effect of the substrate structure on the radiation properties of microstrip array feed networks is investigated with the space-domain integral equation approach. Numerical and analytical techniques are employed to produce efficient computer algorithms. Results for space and surface wave losses are presented for corner discontinuities printed on substratelsuperstrate, and two-layer substrate...

The purpose of this paper is to present a complete design and analysis of new HMIC 3.5-4.5 GHz broadband balanced amplifier modules using microstrip technology. Two different modules are designed and analyzed. Each module is implemented in a single substrate. The first module used Lange couplers as power splitters and combiners while the second used branch couplers. The components of the module...

In the present paper, design and analysis of a 2.4 GHz printed dipole antenna for wireless communication applications are presented. Measurements on return loss and radiation pattern of this antenna configuration are included in this investigation. The printed dipole is combined with the feeding structure of a microstrip via-hole balun and is fabricated on an FR-4 printed-circuit-board substrat...

A broadband millimetre-wave passive spatial combiner using a microstrip probe array and an oversized coaxial waveguide is successfully designed and tested. The equivalent circuit approach of transverse electromagnetic (TEM) lines is adopted to synthesise the coaxial stepped impedance transformer from a K connector with the oversized coaxial waveguide and to analyse the microstrip probe array. T...

Abstract High-speed and high-frequency PCB interconnect solutions with the slightest discontinuities in physical geometry along microstrip transmission line can significantly degrade integrity of signal being transferred. This paper presents an analysis SMT component pads their impact on successive impedance. During 0805, 1206 2512 package size pad discontinuity evaluations it was spotted, that...

1. Abstract: This paper describes a conformal Finite Difference Time Domain (FDTD) software package and presents its applications to RF antennas and mcrostrip circuit components. The program includes a Visual Basic GUI for graphically inputting the object geometries, setting source and boundary conditions, generating a non-uniform mesh, and post processing of the data. A robust Conformal Finite...

This paper presents a new approach for measuring dielectric properties of materials. The proposed approach is based on applying the synthetic time domain reflectometry to a dielectric filled waveguide. The compromising measurement results show that this algorithm can be successfully applied for measuring other parameters of the materials. Also, the approach has been successfully applied to dete...