Antennas: Fundamentals, design, measurement

Blake, Lamont V.; Long, Maurice W.

doi:10.1049/sbew040e

Cited by 44 publications

(32 citation statements)

References 11 publications

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“…This may be due to the less cross-polarization effect for both E-and H-plane near the operating frequency bands, the value of which are almost less than −30 dB. The radiation performance of the patch antenna is further numerically verified by measuring the gain where two identical antennas have been used along with the test antenna [19]. The measured gain and corresponding radiating efficiencies of the antenna prototype are depicted in Fig.…”

Section: Numerical Results and Discussionmentioning

confidence: 96%

Miniature size multiband planar patch antenna fabricated on a bioplastic substrate

Ahsan

Islam²,

Ullah

et al. 2015

Bulletin of the Polish Academy of Sciences Technical Sciences

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Abstract. In this article, a simple design of rectangular microstrip feed planar antenna with wide arcs and square shape slot is proposed for Radio Frequency Identification (RFID), Worldwide Interoperability for Microwave Access (WiMAX) and C/X-band wireless communications. The prototype of the antenna has been fabricated 1.0 mm thick ceramic filled bioplastic substrate by using optimal dimension obtained from design/simulations and antenna performances are experimentally tested. The experimental results confirm the impedance bandwidths for S11≤ −10 dB are of 712 MHz (0.355-1.067 GHz), 1.38 GHz (2.92-4.3 GHz) and 2.46 GHz (6.55-9.01 GHz) for 0.788, 3.34 and 8.01 GHz band respectively. The proposed antenna shows almost steady and symmetrical radiation patterns for all three bands with the maximum gains of 1.37, 2.8 and 3.56 dBi respectively. Based on the antenna performances, it can successfully cover the frequency band requirement for RFID, WiMAX and C/X-band applications.

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Section: Numerical Results and Discussionmentioning

confidence: 96%

Miniature size multiband planar patch antenna fabricated on a bioplastic substrate

Ahsan

Islam²,

Ullah

et al. 2015

Bulletin of the Polish Academy of Sciences Technical Sciences

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“…A half wave dipole antenna deputised as a source antenna and located at a distance such that both antennas are at each other's far field zone. This is to ensure that the AUT exposed to a plane wave of uniform amplitude, phase, and polarization [24]. The far field distance for both antenna was calculated using the following formula [25]:…”

Section: Radiation Patternmentioning

confidence: 99%

Hermetic Implantable Antenna Inside Vitreous Humor Simulating Fluid

Permana¹,

Fang²,

Rowe³

2013

PIER

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Abstract-Retinal prosthesis system is currently being developed in various places around the world. This system involved data transfer between an implanted antenna inside an eyeball and an external camera that is located just in front of the eyeball. While there are plenty of publications about the stimulating electrodes or the processing unit of the system itself, very limited amount has been published regarding the wireless communication link between the two antennas despite the fact that the electromagnetic wave will propagate through a complex medium in the form of Vitreous Humor. This paper will discuss about the constraints associated with implanting an antenna into an eyeball. An antenna design and simulation was performed with the aid of High Frequency Structure Simulator (HFSS) and its Finite Element Method (FEM) mathematical solver in the operating frequency of 402-405 MHz. The antenna, which was a 4 layer microstrip antenna, was positioned at the centre of a spherical model filled with homogeneous Vitreous Humor material. Antenna performances that include return loss, bandwidth, gain, radiation pattern, and SAR value are analysed and compared against those of other implantable antennas operating in Medical Implant Communication Service (MICS) band. Free space and simulating fluid measurements were also conducted on the fabricated antenna to validate the simulation results. It was concluded that the fabricated antenna was able to produce the similar performance to the simulation results and hence at the same level as the other antennas operating in material with lower dielectric constants and conductivities.

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“…Log-periodic antennas are designed for specific purpose to fulfill the large bandwidth requirement. The beginning research of Log-periodic antennas or frequency independent antennas are started in 1957at the university of Illinais by D.U.Hamal and Isbell [2]. With the proper design of these antennas a bandwidth of 10:1 can be obtained.…”

Section: Introductionmentioning

confidence: 99%

Design of Four Arm Log Periodic Antenna for MIMO Applications

Kishore¹

2015

IJIRCCE

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ABSTRACT:The log-periodic antennas are very effectively useful to achieve large bandwidth. The planar logperiodic antennas are having advantage of getting large bandwidth with careful design of impedance matching. The chebyshev impedance matching is one of the techniques to provide feed for the antenna followed by impedance matching. In This paper the log-periodic antenna is designed with chebyshev impedance matching technique. The four arm log-periodic antenna is designed for the both linear and circular polarization. The antenna gives circular polarization when the 90 0 phase delay applied between the two dipoles. The antenna is operated at 3GHz gives the band of operation up to k/ka band from 2GHz. The antenna is designed and simulated by using HFSS software, the VSWR, S 11 and axial ratio plots are generated from 2GHz to 18GHz.

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Antennas: Fundamentals, design, measurement

Abstract: The publisher and the author make no representations or warranties with respect to the accuracy or completeness of the contents of this work and specifi cally disclaim all warranties, including without limitation warranties of fi tness for a particular purpose.

Cited by 44 publications

References 11 publications

Miniature size multiband planar patch antenna fabricated on a bioplastic substrate

Miniature size multiband planar patch antenna fabricated on a bioplastic substrate

Hermetic Implantable Antenna Inside Vitreous Humor Simulating Fluid

Design of Four Arm Log Periodic Antenna for MIMO Applications

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