In this paper, a parametric study of conventional Uniplanar Compact Photonic Band Gap (UC-PBG) structures, with different dimensions, is investigated. The studied structure operates as an Artificial Magnetic Conductor (AMC) in which the performance is mainly characterized by the resonant frequency and bandwidth. Simulation and numerical analysis have been carried out using CST Microwave Studio ...

This paper proposed a radio frequency identification (RFID) Reader Antenna which operates on ISM band with frequency range from 902 to 928 MHz and bandwidth of the antenna is 58MHz. Antenna consist of rectangular patches on Rogers RO4360 substrate with microstrip feed line. Return loss of the antenna comes out to be about -39.98 dB on behalf of the frequency 907MHz. Gain of the proposed antenna...

This article presents the design of rectangular microstrip antenna. The prototype antenna is designed and fabricated on FR4 substrate of dielectric constant Єr = 4.4 and thickness h = 1.66 mm. The proposed antenna is excited using co-axial probe feed. The experimental result of rectangular-shaped microstrip antenna exhibits the excellent radiation characteristic corresponding to impedance bandw...

An improved novel printed wideband flat-plate monopole antenna is presented. The proposed antenna consists of a pentagonal monopole embedded in a corner notch in the antenna ground plane part. Simulated and measured results of the input return loss for the proposed antenna are in good agreement. The antenna has been shown to operate satisfactorily in the 0.47–6 GHz frequency range, and is there...

Our aim is to develop a microwave antenna whose radiation pattern is electronically controlled. The radiation pattern of regular antennas is determined by the Fourier-transform of the complex illumination function on the antenna aperture. This radiation pattern is mechanically fixed so its alteration is impossible. Therefore we construct an antenna system of several antenna elements. All elemen...

A low-cost and portable vector network analyzer (VNA) which covered operating frequency between 1MHz to 3GHz is used for vector reflection coefficient and standing wave ratio (swr) of the various microstrip antennas. This paper presents measurements of various ultra wideband (uwb) microstrip antennas for applications in biomedical field. Selection of antenna is an important key for detection of...

Compact Circularly Polarized Slot-Ring Antenna and Microstrip Bandpass Filter Using Triangular Open-Loop Resonators. (December 2006) Muhammad Fahad Farooqui, B.E., NED University Chair of Advisory Committee: Dr. Kai Chang In this thesis two different research topics are undertaken, both in the area of compact RF/microwave circuits design. The first topic involves the design of a compact circula...

A microwave brain imaging system model is envisaged to detect and visualize tumor inside the human brain. A compact and efficient microstrip patch antenna is used in the imaging technique to transmit equivalent signal and receive backscattering signal from the stratified human head model. Electromagnetic band gap (EBG) structure is incorporated on the antenna ground plane to enhance the perform...

This paper presents a full-wave, whole-system modeling of Microwave Imaging Tomography (MWT) systems, to be used as forward model in reconstruction (inverse) algorithms. The full geometry including antennas and their ports is simulated via a Finite Element Method (FEM) approach. A new technique is used to compute the antenna operation in the system, which provides a general method to enforce th...

The microwave band fixed wireless access (FWA) systems are expected to operate in non-line-of-sight (NLOS) environments in order to loosen the restrictions on antenna installation at a subscriber station (SS). In addition, it is planning to adopt array antenna at a SS in the next generation FWA. In this case, Direction of arrival (DOA) is a one of the important propagation parameters. We carrie...