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Showing 1 to 20 of 37 for “"Microstrip Antennas"”.
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Conformal microstrip antennas
Microstrip antennas are widely used in several different technological areas including communication and navigation systems, weapons systems, radars, and telemetry and tracking systems. The microstrip antennas' physical features and simplicity of construction make them especially suited for these …
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Multimode and Multiband Microstrip Antennas
… work on the broadband and multiband matching of microstrip patch antennas. Microstrip patch antennas suffer from many constraints on their performance. One major restriction is their narrow impedance bandwidth. An effective method to resolve this is adding more resonators to the antenna structure …
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Reconfigurable microstrip antennas with tunable radiation pattern characteristics
… dissertation, designs for reconfigurable beam microstrip antennas with tunable radiation characteristics have been proposed. The method to achieve these designs is the reconfigurable parasitic element (s) of tunable electrical size, placed in close proximity to the driven patch. A tuning …
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Theory and applications of chirality in microstrip antennas
… of chiral materials as substrates of microstrip antennas offers novel radiation properties over achiral microstrip antennas. A number of representative antennas are analyzed with respect to radiation pattern, main beam position, and directivity.
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Fast Electromagnetic Modeling of Multilayer Microstrip Antennas and Circuits
… together, a fast integral equation solver for microstrip structures in multilayer media is developed. Examples of circuits and antennas are presented to demonstrate the accuracy and efficiency of this solver.
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Microstrip Antennas: Broadband Radiation Patterns Using Photonic Crystal Substrates
… investigate a novel method to develop broadband microstrip (patch) antennas using substrates containing photonic crystals. Photonic crystals are a class of periodic dielectric, metallic, or composite structures that when introduced to an electromagnetic signal can exhibit a forbidden band of …
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An Empirical Study of Computational Optimisation Techniques for Microstrip Antennas
… applied to real world problems, such as wire antennas, building structures and turbine blade profiles. Some of these techniques are relatively well known within the scientific and engineering communities, such as genetic algorithms. Microstrip antennas (MSAs) are widely used, especially for …
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Arbitrarily Oriented Biaxially Anisotropic Media: Wave Behavior and Microstrip Antennas
… employed in full-wave analyses of rectangular microstrip antennas printed on biaxial substrates.</p> <p>The general characteristics of electrically biaxially anisotropic (biaxial) media are presented including permittivity tensors, optic axes, orientation of the medium, and birefringence. After …
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ANALYSIS AND DESIGN OF BROADBAND AND DUAL BAND MICROSTRIP ANTENNAS
The concept of using microstrip antennas to provide printed radiating structures, which are electrically thin, lightweight, and low cost, is a relatively new and exciting development in antenna engineering. The application of this phenomenon to design useful antennas started only in the early 1970s …
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Design and analysis of miniaturized implantable and wearable microstrip antennas
… is the development of implantable and wearable antennas as a part of MBAN that could be used by saving their collected data in PDAs or any portable device or mainframe computers. In this work, two antenna types, the wearable and the implantable antennas are researched for MBAN applications. The …
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Analysis and modeling of microstrip antennas with electromagnetically coupled feeds
A rectangular microstrip patch which is excited by an electromagnetically coupled microstripline is analyzed and modeled. Moment method analysis is employed to obtain approximate representations for the patch and feedline current distributions, and input impedances are found by examining the …
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Ground Plane Slot Structures for Isolation of Cosited Microstrip Antennas
… been shown to reduce coupling between cosited antennas. Although some such structures have already been reported, no analytical model exists to describe their behavior and there are no design guidelines. In this work, the behavior of reported ground plane structures is used as a clue to obtain …
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Analysis and design of electrically small, circularly polarized cylindrical microstrip antennas
… innovative conformal GPS antenna solutions. Microstrip antennas are well suited for this type of application due to their inherently low profile package and ability to conform to the shape of a given platform. Since their inception over four decades ago, a significant body of literature has …
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Numerical Methods for the Electromagnetic Modeling of Microstrip Antennas and Feed Systems
The importance of low-cost printed circuit antennas has brought about a continued effort to improve and simplify the analysis of multilayered or stratified media. This thesis derives the dyadic Green functions for the electromagnetic fields in a multilayered medium and shows their relationship to …
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Novel feeds for microstrip and slot antennas: Theory and experiment
Microstrip and slot antennas with novel feeds suitable for monolithic microwave integrated circuit (MMIC) applications are investigated both experimentally and theoretically, using the cavity model as well as a full-wave analysis. The input impedance of a microstrip antenna fed by an arbitrarily …
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A Numerical and Experimental Investigation of Planar Inverted-F Antennas for Wireless Applications
… has grown significantly. Devices having internal antennas have appeared to fill this need. Antenna size is a major factor that limits device miniaturization. In the past few years, new designs based on the microstrip antennas (MSA) and planar inverted-F antennas have been used for handheld …
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Efficient modeling of passive electronic devices using the finite-difference time domain method
… with fine features, e.g., electronic packages, microstrip antennas and cavity resonators, that are analyzed using the Finite Difference Time Domain (FDTD) algorithm for solving Maxwell's equations. One of the fundamental problems associated with analyzing this class of structures is that …
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Development of compact antenna for RFID application
In recent years, microstrip antennas have met commercial requirements. The advent of wireless applications requires a compact antenna, easy to manufacture. The goal of the project is to develop a microstrip monopole antenna for RFID tag applications that reduce size. The purpose of this antenna is …
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ΜΕΛΕΤΗ ΟΡΘΟΓΩΝΙΚΩΝ ΚΑΙ ΤΡΙΓΩΝΙΚΩΝ ΜΙΚΡΟΤΑΙΝΙΑΚΩΝ ΚΕΡΑΙΩΝ
THE ANALYSIS OF MICROSTRIP ANTENNAS WITH RECTANGULAR AND THREE TYPES OF TRIANGULAR PATCHES IS GIVEN IN THIS DISSERTATION. THE THEORETICAL ANALYSIS IS CARRIED OUT BY THE USE OF THE OPTICAL RAYS (GEOMETRIC OPTICS THEORY) METHOD. CLOSED FORM EXPRESSIONS FOR THE TOTAL INTERNAL FIELD (UNDER THE PATCH) …
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