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Showing 1 to 15 of 15 for “"broadband antenna"”.
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Analysis and Design of a Broadband Antenna for Software Defined Radio
This work presents the design and analysis of a broadband antenna capable of achieving an instantaneous 3:1 VSWR bandwidth and omnidirectional radiation coverage spanning a bandwidth greater than 20:1. The antenna is designed to accommodate the very large bandwidth requirements of software-defined …
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An historical, theoretical and experimental study of the broadband antenna problem with application to short pulse probing radars
… signals is considered. A description of simple broadband radiators is given together with a detailed explanation of both frequency independent and travelling wave phenomena as applied to antennas. The response, to transient excitation, of conventional broadband radiators is examined on the basis …
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Wideband Electromagnetic Band Gap (EBG) Structures, Analysis and Applications to Antennas
In broadband antenna applications, the antenna's cavity is usually loaded with absorbers to eliminate the backward radiation, but in doing so the radiation efficiency of the antenna is decreased. To enhance the radiation efficiency of the antennas EBG structures are used, but they operate over a …
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Novel Fast Algorithms for Time Domain Integral Equation Analysis of Antennas and Circuits
… for analyzing electromagnetic transients in broadband antenna systems and circuits. This is achieved by (i) constructing efficient marching-on-in-time solvers suitable for analysis of scattering and radiation from perfect electrically conducting surface-wire and penetrable dielectric …
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Development of an Electrically Small Vivaldi Antenna: The CReSIS Aerial Vivaldi (CAV-A)
… from the CReSIS Meridian UAV requires a broadband antenna array composed of lightweight, thin, end-fire antenna elements. Toward this goal four Vivaldi antenna designs were simulated, fabricated, and characterized. The final design, dubbed the CReSIS Aerial Vivaldi - Revision A (CAV-A) …
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A Compact RF/Photonic Antenna using a Quantum Dot Mode Locked Laser as a Source
… on achieving an active compact RF/Photonic antenna module based on a broadband antenna design integrated with a quantum dot mode-locked laser (QDMLL). A two-section QDMLL is used to produce pulsed microwaves signals to feed the radiating antenna. To realize the microwave signal radiation …
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Analysis and characterization of the integrated dielectric slab waveguide-wedge antenna using iterative mode-matching technique
… TB and TM polarization to the dielectric wedge antenna fed by a slab waveguide of the same material is presented. The method of solution involves modeling the wedge as a sequence of step discontinuities and using an iterative procedure to track forward and backward partial wave fields, expressed …
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AN INVESTIGATION OF SHORT RANGE ELECTROMAGNETIC WAVE COMMUNICATION FOR UNDERWATER ENVIRONMENTAL MONITORING UTILISING A SENSOR NETWORK PLATFORM
… of the art. The frequency of operation and the antenna are the big challenges that if unlocked, will present many advantages. The aim of this research is to investigate short range electromagnetic wave communication for underwater environmental monitoring utilising a sensor network platform. …
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Miniaturized Antenna for Satellite Broadband Application
User antenna is a crucial component of a high-speed satellite internet system. High directivity, broadband characteristics, and circularly polarized radiations are essential for a user antenna to maintain a reliable connection with the overhead LEO satellite constellation. For commercialization and …
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An investigation of series LC resonant circuits within a sleeve balun to achieve wideband operation
In antenna measurements, it is not recommended to connect a balanced antenna directly to the coaxial cable feed. A balun is required to prevent surface current from flowing onto the outer shield of the feed cable. Balun chokes like the sleeve balun, also known as bazooka balun or quarter-wavelength …
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High-fidelity microwave control of single-atom spin qubits in silicon
… characterisation of a novel nanoscale coplanar antenna for spin control, designed to work at frequencies up to 50 GHz. These tools have allowed us to demonstrate the first ever single-atom spin-qubits in natural silicon, leading the way to demonstrating record qubit performances in isotopically …
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Differentially fed active antennas
… benefits of differentially fed balanced transmit antenna in modern communication system. Extensive experimental studies have established the fact that a true differential amplifier feeding a balanced antenna offers higher linearity and lower distortions compared to the single ended feeding …
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UHF RFID Antenna Impedance Matching Techniques
… retail theft prevention. An RFID tag includes an antenna connected to a Radio Frequency Integrated Circuit (RFIC). RFID tags in the ultra-high frequency (UHF), industrial, scientific and medical (ISM) 902-928MHz band and global Electronic Product Code (EPC) 860‑960MHz band are powered passively …
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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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Unified conformal/nonconformal domain decomposition methods for solving large-scale multi-region electromagnetic problems
… rate, computation time, and memory usage through broadband antenna and antenna array examples. Various numerical examples such as wave propagation, radiation by broadband antennas and phased-array antennas, and cavity scattering are presented to validate the proposed algorithms and demonstrate …