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 73 for “"Patch Antenna"”.
-
Design of microstrip patch antenna for the NPSAT1
… presents the design of two circularly polarized patch antennas for operation at 1.767 GHz and at 2.207 GHz (for receiving and transmitting, respectively) on NPSAT1 satellite. The design requirements for the antennas include a VSWR of less than or equal to 2:1 for 50 omega reference impedance. The …
-
Multi- Gigabit Patch Antenna Wireless Links: An Experimental Investigation.
… To accomplish this, a wide bandwidth suspended patch antenna was developed and modelled using Agilent ADS software. Difficulties with the antenna feed were overcome using an integrated stub tuning method. Three antennas were designed to operate at centre frequencies of 2.4 GHz, 4 GHz, and 6 GHz, …
-
Performance of defected ground structure for rectangular microstrip patch antenna
… or received signal. Rectangular microstrip patch antenna (RMPA) is designed in order to obtain the required parameter responses at 2 GHz. The proposed antenna is excited through the microstrip feed line which is connected directly to the patch antenna. RMPA of length 35.8462 mm and width …
-
Improving port isolation in dual-polarized microstrip patch antenna arrays
… arrays. The advantages of using dual-polarized antennas are the frequency band reuse and simultaneous receive/transmit capability. To fully exploit these advantages the isolation between orthogonally polarized ports must be maximized and radiation cross-polarization minimized. To prevent the …
-
Reconfigurable Wideband Circularly Polarized Microstrip Patch Antenna for Wireless Applications
… thesis, developments of rectangular microstrip patch antenna to have circular polarization agility with wideband performance, for wireless applications are presented. First, a new technique to achieve circularly polarized (CP) probe feed single-layer microstrip patch antenna with wideband …
-
The Effects of Atomic Oxygen on Patch Antenna Performance and Lifetime
… commercial off the shelf parts (COTS), such as antenna, could degrade the satellite’s ability to communicate with ground systems. This thesis looks at how AO erosion affects the performance of patch antennas for CubeSat applications. Patch antennas are small, cheap, low-profile antennas that can …
-
A frequency reconfigurable circularly polarized microstrip patch antenna using liquid metal microswitches
Reconfigurable antennas with adaptable frequency, pattern, and polarization offer flexibility and size reduction for wireless systems that must increasingly execute multiple missions with less volume. These antennas will also complement anticipated cognitive radio systems, which promise more …
-
An investigation of nanoscale materials and their incorporation in patch antenna for high frequency applications
… substrate in the fabrication of Microstrip Patch Antenna (MPA). Antenna technology can strongly gain from the utilisation of low-cost, flexible, light weight with suitable fabrication techniques. The uniqueness of this work is the use of variety of common but unexplored different polymer …
-
Performance characteristics on patch antenna with sar reduction using artificial magnetic conductor (amc) for wban applications
… navigation entertainment. Several types of antennas have been developed for WBANs and they have achieved narrow bandwidth, decrease gain, low radiation efficiency, a high specific absorption rate (SAR) value, high front-to-back ratio (FBR) and structural complexity. However, it is necessary …
-
Design, Simulation and Analysis of A Low Radar Cross Section Uhf Circular Microstrip Patch Antenna and Radome For United States Naval Fleet Broadcast Applications
… that's the topside radiators, also known as her antennas. One of the dominant scatters of large RCS ships are her topside mounted antennas.</p> <p>The intended result of this research effort was to develop a design for a low RCS replacement for the existing AN/SSR-1A antenna, designated as the …
-
Analysis of three different dielectric substrates on square ring microstrip antenna for wireless application
… 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 commercially …
-
Design and Analysis of An Active Integrated Antenna
<p>In this thesis, an active integrated antenna (AIA) system is proposed for potential applications in an RF receiver front end for mobile and wireless communication devices. The AIA system consists of a microstrip patch antenna and a low noise amplifier (LNA), which are integrated together with a …
-
Ultra-wideband miniaturized microstrip patch antennas for wireless communications: design guidelines and modeling
… than what is normally utilized with traditional antenna techniques. The interest for compact consumer electronics is growing in the meantime, creating a demand on efficient and low profile antennas which can be integrated on a printed circuit board. The main objective of this thesis is to study, …
-
Design of microstrip ultra wide band antenna with two notch filters for wireless communication
This research develops a small size UWB patch antenna with two notch filters. U-shaped and J-shaped slots are loaded in the patch of the antenna for WiMAX and WLAN frequency band rejection. The antenna is simulated using the commercially available CST Microwave Studio software. The slots dimensions …
-
Study of Optical OFDM System for Wireless LAN Applications
… laser sources. Identical rectangular microstrip patch antennas have been used at the transmitter and the receiver as well. The simulations were carried out for different SMF and MMF lengths, and the variable wireless distance between the transmitting and receiving antennas was in a range of 40 dB …
-
Ultra-Wideband Imaging System For Medical Applications. Simulation models and Experimental Investigations for Early Breast Cancer & Bone Fracture Detection Using UWB Microwave Sensors
… using radar approach. An actively tuned UWB patch antenna and a UWB Vivaldi antenna are designed and utilised as sensing elements in the aforementioned applications. Both UWB antennas were developed over a range of frequency spectrum, and then characteristics were tested against their ability …
-
Manipulation of antenna-mode radar cross-section in patch antennas
The Radar Cross-Section (RCS) of an antenna has two main components: structural RCS and antenna-mode RCS. Structural RCS is due to the physical geometry of the antenna. The antenna-mode RCS component is due to load impedance mismatches and can be manipulated by changing the load impedance connected …
-
Single Layered Periodic Structure Loaded Textile Patch Antennas
… Single Layered Periodic Structure Loaded Textile Patch Antenna with probe feed excitation. Specifically, this thesis is concentrated on the application of wearable antenna arrays with space suit, since this thesis has collaboration with the University of North Dakota (UND) Space Suit Laboratory in …
-
Simulation of Rectangular, Single-Layer, Coax-Fed Patch Antennas Using Agilent High Frequency Structure Simulator (HFSS)
The Range Limited Antenna (RLA) is a device, which accurately estimates the range of incoming signals and rejects those that arrive from outside a certain, pre-determined range. This task is accomplished by using two multi-element arrays and applying direction finding (DF) algorithms on each of …
Page 1 of 4