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The design of more than one antenna system called antenna arrays. Patch antenna arrays are used extensively due to their high directivity and gain, also light weight and low cost. In antenna arrays energy is wasted in backward radiation as well as losses due to mutual coupling. Placing of elements close to each other can minimize the overall size of an array. On the other hand, a major drawback of...
A RF-microwave broadband power amplifier using the Si-Bipolar transistor is presented in this work. The power amplifier operates in several frequency ranges 1.70–2.20GHz. Which covers the following bands: DCS (Digital Cellular System) (1710MHz–1880MHz) in Europe, PCS (Personal communication Services/System) (1850MHz–1990MHZ) in the United States, UMTS (Universal Mobile Telecommunication System) (1920MHz–2170MHz)...
A novel 5.8 GHz RF-DC rectifier has been developed for wireless power transmission applications. It's about a voltage multiplier topology including 5 schottky diodes well known by their low threshold (150 mv) implemented using microstrip lines technology on an FR4 substrate with dielectric permittivity constant 4.4, thickness of 1.6mm and loss tangent of 0.025. The rectifier is loaded by a 160Ω resistive...
In this paper, a new broadband microwave microstrip power limiter is designed and validated into simulation by using ADS (Advanced Design System) from Agilent technologies. The Power Limiter is based on microstrip technology and Zero Bias commercial Schottky diodes HSMS286x associated as a bridge rectifier. The circuit is validated in two steps. The first and basic circuit is formed from one bridge...
In this paper, a novel study on the design and analysis of a compact printed antenna for multi-band applications are presented. The structure of the entire area is 45×45.5 mm2 and is printed on an FR-4 epoxy substrate. It is suitable for GSM/GPS/PCS applications by using an M-shaped antenna which is formed of different arms and an L-shaped shorted strip connected between the feeding line and the ground...
In this paper, a compact diplexer based on coupled stepped impedance resonators (SIRs) is designed for Digital Communication System and the industrial, scientific and medical applications. The diplexer is composed from two band-pass filters operated at 1.8 and 2.45 GHz respectively. The size and the position of the SIR and the feed lines are determined through the theoretical design and the simulation...
In this paper we have developed and designed a low cost fractal Multi band microstrip antenna structure. This antenna is validated in the ISM (Industrial Scientific and Medical) band at 2.45 GHz and 5.8 GHz. The aim of this work is to develop an antenna which can be associated with an RF-DC rectifier to design a rectenna system for wireless power transmission “WPT”. The technique used to have a multiband...
This paper comes with a new study on the conception of a CPW-Fed multi bands planar antenna. The design takes into account that this structure can be integrated with circuits behind, that why the Fed is a CPW one. The antenna validated is suitable for GSM, DCS and ISM band. The entire area of the antenna is 36×72.5 mm2 and it is printed on an FR4 substrate. The printed U-shaped antenna is formed from...
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