Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
Results
Showing 1 to 20 of 40 for “"Microstrip antenna"”.
-
Design of microstrip antenna based on different material properties
Microstrip antenna has several advantages compared to conventional microwave antenna. These type of antenna are light weight, low volume and thin profile configurations, which can be made conformal. The cost of fabrication is also low and can be manufactured in a large quantities. This project will …
-
Finite difference time domain analysis of microstrip antenna-circuit modules
Compact microstrip antenna-circuit modules, which could be used as front-ends for future wireless systems applications, require electromagnetic modelling due to the close interaction of the circuit with the antenna. Spectrum crowding and EMC/EMI issues call for modelling of the radiation of such …
-
Analysis of three different dielectric substrates on square ring microstrip antenna for wireless application
… modern integrated circuit technology. However, microstrip antenna suffers from low bandwidth. The objective of this project was to improve the bandwidth by proposing square ring technique and investigation for the enhancement strategy of bandwidth performance and analysis of different …
-
Reconfigurable phased microstrip antenna array with defected ground structure and defected microstrip structure for beam steering application
… to electronically steer the beam maximum of an antenna electric field pattern to some predefined point in space. The performance of a phased antenna array for beam steering without moving the antennas is important to military and civil applications. A steerable antenna with tunable phase shifter …
-
A Dual Resonant Microstrip Antenna for UHF RFID in the Cold Chain Using Corrugated Fiberboard as a Substrate
… we propose a novel dual-resonant planar UHF RFID microstrip antenna designed to be both insensitive to the content/environmental conditions of the corrugated fiberboard box and economically feasible. We provide simulated performances and experimental validations to show that the proposed …
-
The design and analysis of a linear low profile ultra-wide band tightly coupled U-slot microstrip antenna array
Submission published under a 24 month embargo labeled 'Closed Access', the embargo will last until 2025-12-01
-
Investigation of a Novel Dual Band Microstrip/Waveguide Hybrid Antenna Element
Microstrip antennas are low in profile, light in weight, conformable in structure and are now developed for many applications. The main difficulty of the microstrip antenna is its narrow bandwidth. Several modern applications like satellite communications, remote sensing and multi-function radar …
-
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 …
-
Compact integrated designs of microwave filters and antennas with dual-polarization
Microwave antenna and filter circuits are key components in all types of communication systems. In order to achieve high compactness and high performance for next generation wireless networks, this thesis investigates the use of a material with a high dielectric constant (approximately 20) and low …
-
Investigation of Low Profile Antenna Designs for Use in Hand-Held Radios
Antennas in hand-held radios must be compact and unobtrusive. Electrically small and low-profile antennas experience high input reactance, low input resistance, and low radiation efficiency.Further degradation of radiation efficiency occurs in hand-held radios due to size-reduced ground planes, …
-
Development of compact circular polarized antenna for WLAN application
… in both the transmitter and receiver antennas is important in terms of decreasing transmission losses. The use of circularly polarized antennas presents an attractive solution to achieve this polarization match which allows for more flexibility in the angle between transmitting and …
-
Single-band and Dual-band Beam Switching Systems and Offset-fed Beam Scanning Reflectarray
… capability and multi-band operation of the microstrip reflectarray have been main research topics in the reflectarray design. Narrow bandwidth of the reflectarray is the main obstacle for the various uses of the reflectarray. The wideband antenna element with a large phase variation range …
-
Analysis and design of electrically small, circularly polarized cylindrical microstrip antennas
… that require 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 …
-
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 …
-
Efficient THz lasers and broadband amplifiers based on quantum cascade gain media
… design, fabrication and characterization of the microstrip antenna coupled third-order distributed feedback QC lasers aimed for 2.060 THz atomic oxygen line. THz travelling-wave QC amplifiers are highly desired to achieve broadband amplification of THz radiation in free space. The second part of …
-
Polarization diverse tracking antenna with high sensitivity
The design of an S-band aperture coupled microstrip antenna array for use on airborne telemetry platforms is presented. The High Sensitivity Diverse Tracking Antenna (HSDTA) is capable of receiving both left and right hand circular polarizations and has RF auto-tracking capability. Novel placement …
-
Array antenna synthesis including element and feed coupling
Precise radiation pattern control for an array antenna requires precise control of array element excitations. One application is that of low side lobe patterns. Classical synthesis methods for the desired pattern may not be realized in practice due to coupling effects. Coupling occurs in two forms: …
-
Reduction Of Mutual Coupling In Antenna Technology Using Elliptically Shaped Metasurfaces
… of mutual coupling between closely spaced antennas and the increase of antenna bandwidth. This is done first using a graphene monolayer as a cloak to decrease mutual coupling and restore radiation patterns for closely spaced antennas at THz frequencies. The introduction of the graphene …
-
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 …
-
A Radiation Reconfigurable Magnetic Line Source Antenna: Modeling, Integration With RF MEMS, and Applications
… work and progress of a radiation reconfigurable microstrip antenna. It has been designed to reconfigure its radiation pattern between broadside and endfire directions. Each configuration operates within an impedance bandwidth common to both states, and the desired radiation characteristics in …
Page 1 of 2