Circular High-Impedance Surfaces Characterization

Sarrazin, Julien; Lepage, Anne Claire; Begaud, Xavier

doi:10.1109/lawp.2012.2189349

Cited by 42 publications

(24 citation statements)

References 9 publications

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“…Among them, we find AMC made by periodic or quasi-periodic metal-dielectric structures. In this paper, an annular configuration is proposed to obtain an AMC like behavior [20]. The characterization method for an annular AMC is similar to a traditional cell (square, rectangular, etc.)…”

Section: B Crossed Dipole Antenna With a Pec Cavitymentioning

confidence: 99%

New compact S-band antenna for Nanosatellite TeleMetry and TeleCommand applications - EyeSat program

Bellion

Elis

Gaetano

2016

2016 10th European Conference on Antennas and Propagation (EuCAP)

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This paper presents a new compact single-feed circularly polarized S-band antenna for Nanosatellite TT&C applications. The antenna is composed of two crossed dipoles printed on both sides of a substrate, center-fed by a 50Ω coaxial cable. It provides a unidirectional pattern thanks to a reflector placed below the antenna. In order to reduce the size of the structure, this reflector is composed of an Artificial Magnetic Conductor (AMC). The bandwidth of the antenna is 17% (1.98 -2.35 GHz) and covers the 2.025-2.110GHz TeleCommand band and the 2.2-2.29 GHz TeleMetry band. The size of the entire structure including the radome and the satellite interface is 0.58λ min of diameter and 0.081λ min of height where λ min is the wavelength at the lowest frequency. This new antenna concept will be used in the EYESAT CNES Program in 2017.

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Section: B Crossed Dipole Antenna With a Pec Cavitymentioning

confidence: 99%

New compact S-band antenna for Nanosatellite TeleMetry and TeleCommand applications - EyeSat program

Bellion

Elis

Gaetano

2016

2016 10th European Conference on Antennas and Propagation (EuCAP)

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“…These structures are also utilized for miniaturization and bandwidth enhancement [16][17][18][19][20][21]. Although most of the literature focus on the rectangular AMCs, the circularly symmetric ground planes are addressed in [22][23][24][25][26][27] however, they mostly concentrate on the electromagnetic bandgap properties rather than on reflection types which take place at a different frequency band. In Section 3 the reflection properties of a circular AMC and its design guidelines are presented.…”

Section: Introductionmentioning

confidence: 99%

Applications of AMC-based impedance surfaces

et al. 2018

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Abstract. The recent and major enhancements of artificial magnetic conductor (AMC) and their applications namely RCS reduction, low-profile antennas and holographic leaky wave antennas are reviewed. Full-wave simulations are compared to measurements of fabricated models, and a good agreement is attained. All of the measurement were conducted in the Arizona State University electromagnetic anechoic chamber (EMAC).

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“…In this paper, we design antenna over Finite size High Impedance Surface (HIS). Use of HIS [7], [10] helps us to design compact and low profile antenna. The antenna is analyzed both in free space and four layer hand model.…”

Section: Introductionmentioning

confidence: 99%

Design of Circular Loop Antenna using High Impedance Surface (HIS) for Wearable Applications

M¹

2018

IJRASET

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Design of an antenna for wearable application is a challenging task, thus it need to be specially designed to function well on while being worn. In this paper, we present a circular loop antenna mounted over High Impedance Surface (HIS) operating at 2.4 GHz frequency band for wearable application. The designed antenna is simulated using CST Microwave Studio Suite. The antenna is simulated both in free space and four layer model (skin, fat, muscle, bone). It is observed that the VSWR is less than 2 and Specific Absorption Rate (SAR) is below threshold value for Cellular Telephones. The efficiency of the antenna is better on human hand and SAR simulated value is low. S-parameter, gain and SAR of the proposed antenna were calculated. Keywords: wearable, circular loop antenna, High Impedance Surface, Four layer model, Specific Absorption Rate (SAR). I.INTRODUCTION Due to development of Wireless Communication, many portable handsets has been invented. The recent invention is wearable devices such as Smart watch, Google glass, devices for medical application, etc. In medical field wearable devices are used for measuring Blood Pressure, Heart rate, Fitness Tracking, etc. The wearable technology has become boon to the society. At the same time, wearable antenna face increasing challenge in terms of Specific Absorption Rate. Nowadays, Smart Watches are becoming more popular. In recent invention Smart watches [1] act as a wearable computers, which can synchronized with mobile handsets via Bluetooth or Wi-Fi. For this purpose, the designated antenna for transmitting/receiving signals should be small and concealed within the devices. For design of compact and low profile antenna, AMC (Artificial Magnetic Conductor) based antenna are introduced and studied in [2]- [6]. Different types of antenna is used as radiator above the AMC to improve the performance of the antenna. Working principle of AC is Image Theory. According to Image theory, when an antenna is placed over a Perfect Magnetic Conductor (PMC), the images of currents are in the same direction to the antenna current direction which result in constructive Interference. In [2] slot antenna has been designed that operates at 2.45GHz frequency. The efficiency in free space is about 85%, not suitable for wearable application. In [3] monopole antenna is designed and it operates at 2.4-2.48 frequency band. The gain of the antenna is about 4.2 dB and efficiency in free space and human hand model is not given. In [4] PIFA is designed and the gain and efficiency in free space is around 6.3 dB and 50% respectively. In [5] integrated metal frame antenna is designed and it operates at 2.4-2.49 frequency band. The efficiency in free space is about 70% and in one layer model the efficiency drastically reduces to 26%. In [6] slot antenna is designed, the efficiency in phantom hand is about 65%. Phantom hand is made of bone, but the EM waves are absorbed by skin, muscle and fat is not considered. Thus due to these the efficiency decreases rapidly. The author didn't present ...

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Circular High-Impedance Surfaces Characterization

Cited by 42 publications

References 9 publications

New compact S-band antenna for Nanosatellite TeleMetry and TeleCommand applications - EyeSat program

New compact S-band antenna for Nanosatellite TeleMetry and TeleCommand applications - EyeSat program

Applications of AMC-based impedance surfaces

Design of Circular Loop Antenna using High Impedance Surface (HIS) for Wearable Applications

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