antenna research papers 2012 section 6

antenna research papers 2012 section 6




Design and Laboratory Evaluation of the Phase II LMR Multiband Antenna System
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This report documents the design, construction, and laboratory evaluation of a prototype land mobile radio (LMR) multiband antenna system, intended for vehicular installations. This antenna system is being developed as part of our project Antenna Systems for Multiband

FEM Modelling and Experimental Research of Die Forging of Ni-Mo-Fe Alloy AntennaComponents
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This work was focused on the design of hot forging process for a selected element of Ni-Mo- Fe alloy. The research included numerical FEM simulation, testing in industrial conditions as well as laboratory tests. The numerical FEM simulation of hot forging of a selected forging

A novel frequency-selective metamaterial to improve helix antenna
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ABSTRACT A novel frequency-selective metamaterial with negative permittivity and permeability for improving directivity and gain of a helix antenna is presented in this paper. The proposed metamaterial is composed of two Z-shape resonators printed on opposite

Phenomenology and system engineering of micro-and nano-antenna FPA sensors for detection of concealed weapons and improvised explosive devices
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ABSTRACT The ability of millimetre wave and terahertz systems to penetrate clothing is well known. The fact that the transmission of clothing and the reflectivity of the body vary as a function of frequency is less so. Several instruments have now been developed to exploit

CPW Fed Rectangular Slot Antenna for Wideband Applications
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ABSTRACT A Coplanar Waveguide (CPW) fed slot antenna for wideband applications is presented. The slot antenna is excited by a CPW with a U-shaped tuning stub. The simulations were performed for S11 and the radiation patterns. The structure was

Optimization of characteristics of Dipole antenna with high impedance surface at 2.4 GHz
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ABSTRACT A design of a High Impedance Surface (HIS) with dipole antenna at 2.4 GHz is achieved. According to the simulated performances of this HIS, an ideal HIS is defined as a Perfect Magnetic Conductor (PMC). Based on this, simulations a study about the

Single-antenna Low-power Spread Spectrum Adaptive Echo Cancellation System
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ABSTRACT Full-duplex wireless communication networks need to deal with echo signals in order to obtain good performance, which could be achieved by using an echo canceller. By using multiple transmitters and receivers to relay the desired signal, dynamic ranges are

Ultra-Wide-Band Microstrip Concentric Annular Ring Antenna for Wireless Communications
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ABSTRACT In this paper, a new design technique for bandwidth enhancement of concentric microstrip annular ring slot antennas is presented. Using this technique, an Ultra-Wide-Band antenna is designed with simulated bandwidth of 111.29%. Keywords: Microstrip antenna,

Low Cost Antenna Multi-band for Mobile Application
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ABSTRACT A new antenna is proposed, that works on the bands: UMTS (1920-2170 MHz) and WiMax (2500~ 2690 MHz and 3400-3800 MHz) for mobile applications. The proposed antenna is a circular sector microstrip antenna (CSMA). It has a miniature size, low cost

HIGH GAIN ANTENNA CALIBRATION ON THREE SPACECRAFT
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ABSTRACT This paper describes the alignment calibration of spacecraft High Gain Antennas (HGAs) for three missions. For two of the missions (the Lunar Reconnaissance Orbiter and the Solar Dynamics Observatory) the calibration was performed on orbit. For the third

A Compact Multiband Fractal Cantor Antenna for Wireless Applications
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ABSTRACT A Compact Multiband antenna is a prospective new exemplar in communication. The miniaturized antenna which tends to accommodate DCS 1.8 GHz (1710-1880) MHz, fGSM-Higher1. 85GHz, PCS 1.9 GHz, IMT 2GHz, UMTS 2.100 GHz, fWiFi 2.44 GHz and

Study of Circular Sector Patch Array Antenna with Two and Four Elements for C and X Band
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ABSTRACT In this paper, an array of two circular sector patch antenna is studied: feeding network, spacing between the elements and the choice of the substrate are chosen to have a bandwidth wide enough and a directional radiation pattern. Then we performed a

Printed Leaf Shaped Monopole Antenna
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ABSTRACT This paper presents a printed leaf shaped antenna with a rectangular ground plane which belongs to the class of printed monopole antenna and is small (16 cm2), compact, conformal and provides an ultra wide band performance giving very good

Design and Simulation of Miniaturized Minkowski Fractal Aperture-Coupled Antenna for 5.8 GHz RFID Applications
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ABSTRACT A miniaturized 3rd-order Minkowski fractal aperture-coupled antenna is designed for 5.8 GHz RFID applications using particle swarm optimization (PSO) technique. The PSO technique runs on MATLAB environment and synchronously coupled with an

8.3. 2.1. 1_1 TDD PDSCH Single-layer Spatial Multiplexing on antenna port 5 (Release 9 and forward)
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Note 2: These physical resource blocks are assigned to an arbitrary number of virtual UEs with one PDSCH per virtual UE; the data transmitted over the OCNG PDSCHs shall be uncorrelated pseudo random data, which is QPSK modulated. Note 3: The modulation

Preliminary results of radiometric measurements of clear air and clouds brightness (antenna) temperatures at 37GHz
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ABSTRACT In this paper the results of polarization measurements of clear air and clouds brightness temperatures at 37GHz are presented. The results were obtained during the measurements carried out in Armenia from the measuring complex built under the

Numerical Analysis of Mushroom-Like and Uniplanar EBG Structures Utilizing Spin Sprayed Ni (–Zn)–Co Ferrite Films for Planar Antenna
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ABSTRACT In this paper, the mushroom-like and uniplanar EBG structures integrated with spin spray (Ni1-xCox) Fe2O4 ferrite films that exhibit such highly capable complex permeability spectra. These films would act much the same way as the metal magnetic films, but at the

8.4. 2.1 TDD PCFICH/PDCCH Single-antenna Port Performance
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This test verifies the demodulation performance of PCFICH/PDCCH for a single-antenna port with a given SNR for which the average probability of miss-detection of the Downlink Scheduling Grant, tested jointly on PDCCH and PCFICH of the specified reference

New Broadband Optimal Directional Gain Microstrip Antenna for Pervasive Wireless Communication By Hybrid Modeling
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ABSTRACT In this paper, hybrid modeling of Micro-strip antenna is presented. Broadband frequency of operation demonstrated by single geometry. for broadening the bandwidth and maximum directional gain (6.6 dBi-8dBi) gap-coupled multi-resonator loaded on parasitic

Novel microstrip patch antenna to use in 2× 2 sub arrays for DBS reception
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ABSTRACT Antennas for direct broadcast satellite (DBS) reception often consist of a parabolic reflector and a LNB are realized in different technologies (the feed in hollow waveguide technology and the signal-processing unit in planar waveguide technology) and are very

Long Range Ultra-High Frequency (UHF) Radio Frequency Identification (RFID) AntennaDesign
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The objective of this research is to design a novel ultra-high frequency (UHF) radio frequency identification (RFID) tag antenna, which has a low profile, long range, and is mountable on metallic surfaces. The antenna will be designed on a 3-D electromagnetic

Analysis on the Inter-carrier Interference of MIMO OFDM with Distributed Antenna Systems?
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ABSTRACT The effect of Doppler spreading destroys the orthogonality of the subcarrier in OFDM giving rise to inter-carrier interference (ICI), and the Doppler spectrum types of MIMO with distributed antenna systems (DAS) may not be the same. This paper focuses on the

Non-Foster Augmentation of a Multiband LMR Antenna System
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This report describes a possible non-Foster augmentation for a multiband land mobile radio (LMR) antenna system being developed under our project Antenna Systems for Multiband MobilePortable Radio[1]. The antenna system is intended for use in multiband vehicle-

Antenna Miniaturization Based on Supperscattering Effect
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ABSTRACT. Antennas are essential components of all existing radio equipments. The miniaturization of antenna is a key issue of antenna technology. Based on supperscattering effect, we found that when a small horn antenna is located inside of a dielectric core and

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