14,544 research outputs found
Microstrip Patch Antenna for GPS Application
The study and the design of rectangular microstrip patch antenna for multiband applications are presented in this paper. They can be simulated on antenna design softwareâs such as High Frequency Simulation Software (HFSS), Advanced Design System Momentum (ADS) and Agilent Vector Network Analyzer (E8361A) where different feeding techniques have been deployed to get the desired results. Two rectangular microstrip patch antennas of frequencies 1.5 GHz and 2.4 GHz are designed and simulated on HFSS
Microstrip Patch Antenna for GPS Application
The study and the design of rectangular microstrip patch antenna for multiband applications are presented in this paper. They can be simulated on antenna design softwareâs such as High Frequency Simulation Software (HFSS), Advanced Design System Momentum (ADS) and Agilent Vector Network Analyzer (E8361A) where different feeding techniques have been deployed to get the desired results. Two rectangular microstrip patch antennas of frequencies 1.5 GHz and 2.4 GHz are designed and simulated on HFSS
Antenna Measurements Using the Mirror Method with Gating in a Time Domain
This paper provides a principal overview of the time domain measurement instrumentation and information about the implementation of the time domain option in the Agilent PNA microwave network analyzer E8364A. The paper also presents practical experiences with antenna measurements realized by sweep mode of a vector network analyzer with data processing in a time domain. The new single antenna methods of gain and antenna radiation patterns measurements are presented. These mirror methods with gating in a time domain are based on the reflection coefficient measurements realized in the frequency domain with time domain data processing. These methods seem to be promising for measurements of gain and radiation patterns of ultra-wideband linearly polarized antennas. The paper compares the results of the new methods with the results of standard measurements
Ultra-Wideband (UWB) rectenna design for Electromagnetic Energy Harvesting
Projecte fet en col.laboraciĂł amb Pontificia Universidad CatĂłlica del PerĂș i Centre TecnolĂČgic de Telecomunicacions de CatalunyaThis work focuses on designing, fabricating, measuring and testing each component of a Rectenna. A rectenna consists of an antenna and a rectifier circuit that is optimized for incoming signals of low power density. This rectenna is used to harvest electric energy from the RF signals that have been radiated at:
ï· GSM-850
ï· GSM-900 (downlink: 935-960MHz)
ï· GSM-1800 (downlink: 1805-1880MHz)
ï· ISM band centered in 2.45 GHz.
This work contains antenna design techniques using Ansoft HFSS software and methods to simulate rectennas using Harmonic Balance and electromagnetic full-wave Momentum with the Agilent Advanced Design Software (ADS2008).
For the antenna fabrication it was used a LPKF Milling machine. And for measurements a Vector Network Analyzer (VNA), spectral analyzer, analog signal generator, multimeter, and anechoic chamber were used
Microwave Measurements Part I: Linear Measurements
An Overview of the most relevant issues concerning RF and microwave linear measurements is presented. Vector Network Analyzer foremost used instrumentation for this kind of measures is describe
Efficient Rectenna Design for Ambient Microwave Energy Recycling
Projecte realitzat en col.laboraciĂł amb el Centre TecnolĂČgic de TelecomunicacionsThe work focuses on designing, measuring and testing an antenna and recti er circuit
(RECTENNA) optimized for incoming signals of low power density. The rectenna is
used to harvest electric energy from the RF signals that have been radiated by communication
and broadcasting systems at ISM band centred in 2.45 GHz., This work
contains methods to simulate rectennas with Harmonic Balance and electromagnetic
full-wave Momemtum by Agilent Advanced Design Software, used of LPKF Milling
machine for antenna fabrication , Vector Network Analyzer, spectral analyzer, digital
generator, multimeter, and anechoic chamber for antenna and recti er measurements.
The work is motivated by two types of applications: powering of low-power sensor and RF energy recycling being aware of the energy consumption and e ect to the
natural environment. The goal of this work is to determine the usefulness of low-power
recti catio
Integrated Open Loop Resonator Filter Designed with Notch Patch Antenna for Microwave Applications
This paper presented the design of integrated open loop resonator bandpass filter with notch type antenna for the use in microwave applications. Chebyshev type filter is selected as the filter characteristics and cascaded design with the antenna to produce a single module, Integrated Filter Antenna (IFA). Special feature of the antenna is the implementation of notch on the patch antenna to improve the efficiency. IFA is then simulated in electromagnetic simulation tool, Agilent Advance Design System (ADS) version 2016 and measured using R&S Vector Network Analyzer. It shows that the proposed IFA produced good measured return loss >-30dB with both vertical and horizontal gain of 9.11dBi and 8.01dBi respectively
The random component of mixer-based nonlinear vector network analyzer measurement uncertainty
The uncertainty, due to random noise, of the measurements made with a mixer-based nonlinear vector network analyzer are analyzed. An approximate covariance matrix corresponding to the measurements is derived that can be used for fitting models and maximizing the dynamic range in the measurement setup. The validity of the approximation is verified with measurements
Group-delay measurement of frequency-converting devices using a comb generator
We propose a new method for the measurement of (group) delay from the radio-frequency (RF) input to the intermediate-frequency (IF) output of a mixer or a receiver. The method is particularly convenient for measuring the change in group delay with the local-oscillator (LO) tuning frequency of the receiver since the method does not require access to, or even knowledge of, the LO signal. The method employs a calibrated comb (impulse) generator. Other required equipment is limited to a reference signal generator and a digitizer of modest bandwidth, allowing the measurement to rely on a low-frequency generator and an oscilloscope. Simulated and measured data are presented to verify the approach
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