Temperature Dependency (25 &lt;spl deg&gt;C - 400 &lt;spl deg&gt;C) of a Planar Folded Slot Antenna on Alumina Substrate

Scardelletti, Maximilian C.; Jordan, Jennifer L.; Ponchak, George E.

doi:10.1109/lawp.2008.2006068

“…In another study, a detailed characterisation of folded dipole antenna made of gold on alumina substrate was carried out for temperature range of 25-400°C. It has been reported that 1% resonant frequency shift was observed [3].…”

Section: Introductionmentioning

confidence: 98%

Pattern diversity antenna with high‐temperature tolerance for body area networks

Faiz

¹

,

Gogosh

²

,

Rehman

³

et al. 2016

IET Microwaves, Antennas & Propagation

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A high‐temperature tolerant pattern diversity antenna is presented for body wearable applications in hostile conditions. The proposed system consists of a dielectric resonator antenna (DRA) placed at the centre of a slot loop antenna. The combination yields pattern diversity with broadside and endfire radiation patterns from slot loop and DRAs, respectively. The antenna system offers common bandwidth of 4.95% with port isolation of better than 13 dB at 2.4 GHz. The thermal characteristics of antenna have been studied for high‐temperature operation and no discernible change in the radiation behaviour is noted. The antenna undergoes 2% resonant frequency shift when operated at elevated temperature. The antenna diversity has been measured for three on‐body communication channels. The antenna offers 9.5 dB diversity gain in a pure non‐line‐of‐sight channel surrounded by a rich fading environment subjected to the selection combining scheme. The antenna has dimensions of 0.4λo × 0.4λo × 0.1λo.

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“…Dans ce cas, le maintien du fonctionnement de l'antenne est testé après l'application de conditions sévères telles que l'atmosphère saline, la projection d'eau. Les antennes de positionnement GLONASS pour les applications GPS sont validées suivant ce processus [1]. La plupart des effets thermiques ont un impact sur la déformation des parties métalliques des antennes, qui est d'une importance particulière dans le cas des antennes à réflecteur, la variation de température peut aussi affecter la phase et l'amplitude des composants actifs [2] Les courbes de température sont enregistrées sur la figure 6.…”

Section: Introductionunclassified

Mesure des paramètres d’une antenne sous une température controllée

Sage¹,

Charles²,

Lerat³

2015

17th International Congress of Metrology

0

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Antenna design for aeronautical application requires the verification strict environmental conditions with important temperature and atmospheric constraints. The verification of performances of an antenna design is usually performed by measuring its electrical performances before and after thermal and hygrometric cycling to simulate the exposure to outdoor conditions. In this process the impact of temperature variation on antenna gain, radiation pattern or phase, is not tested while it may affect the antenna performance and modify the readout of the associated sensors which are dependent on amplitude of the signal and also on phase information. In particular the design of antennas based on innovative substrate or radome materials may require the validation of environmental withstanding of the antennas in the early design phase. Several solutions have been developed to perform the measurement of antennas under a temperature constraint; most of them involve a low dielectric permittivity enclosure containing the antenna itself. The temperature variation is obtained either by putting some part of the antenna (preferably metallic) in contact with a thermostat at high or low temperature; other solutions are based on the circulation of fluid, especially for cold temperature variations. In this work a thermal enclosure has been developed to test antenna performances at a temperature ranging from 0°C to 50°C. The thermal enclosure is manufactured from extruded polystyrene; it integrates a set of PT100 temperature sensors to measure the temperature grade inside the enclosure. The antenna complex gain is measured at ambient temperature without the enclosure shell and compared to the measurement inside the shell. The temperature variation is obtained by applying an air flux extracted from a laboratory oven. The measurement achieves traceability of the temperature applied antenna and of the antenna parameters through Sparameters traceable measurements. The process is used to measure Commercial Off-The-Shelf (COTS) and may be applied to prototypes.

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“…Dans ce cas, le maintien du fonctionnement de l'antenne est testé après l'application de conditions sévères telles que l'atmosphère saline, la projection d'eau. Les antennes de positionnement GLONASS pour les applications GPS sont validées suivant ce processus [1]. La plupart des effets thermiques ont un impact sur la déformation des parties métalliques des antennes, qui est d'une importance particulière dans le cas des antennes à réflecteur, la variation de température peut aussi affecter la phase et l'amplitude des composants actifs [2] et ainsi que les propriétés diélectriques du substrat et du radôme de l'antenne, ainsi que celle des câbles intégrés à l'antenne.…”

Section: Introductionunclassified

Mesure des paramètres d’une antenne sous une température controllée

Sage

¹

,

Charles

²

,

Lerat

³

2015

17th International Congress of Metrology

0

View full text Add to dashboard Cite

Antenna design for aeronautical application requires the verification strict environmental conditions with important temperature and atmospheric constraints. The verification of performances of an antenna design is usually performed by measuring its electrical performances before and after thermal and hygrometric cycling to simulate the exposure to outdoor conditions. In this process the impact of temperature variation on antenna gain, radiation pattern or phase, is not tested while it may affect the antenna performance and modify the readout of the associated sensors which are dependent on amplitude of the signal and also on phase information. In particular the design of antennas based on innovative substrate or radome materials may require the validation of environmental withstanding of the antennas in the early design phase. Several solutions have been developed to perform the measurement of antennas under a temperature constraint; most of them involve a low dielectric permittivity enclosure containing the antenna itself. The temperature variation is obtained either by putting some part of the antenna (preferably metallic) in contact with a thermostat at high or low temperature; other solutions are based on the circulation of fluid, especially for cold temperature variations. In this work a thermal enclosure has been developed to test antenna performances at a temperature ranging from 0°C to 50°C. The thermal enclosure is manufactured from extruded polystyrene; it integrates a set of PT100 temperature sensors to measure the temperature grade inside the enclosure. The antenna complex gain is measured at ambient temperature without the enclosure shell and compared to the measurement inside the shell. The temperature variation is obtained by applying an air flux extracted from a laboratory oven. The measurement achieves traceability of the temperature applied antenna and of the antenna parameters through Sparameters traceable measurements. The process is used to measure Commercial Off-The-Shelf (COTS) and may be applied to prototypes.

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Temperature Dependency (25 <spl deg>C - 400 <spl deg>C) of a Planar Folded Slot Antenna on Alumina Substrate

Cited by 13 publications

References 8 publications

Pattern diversity antenna with high‐temperature tolerance for body area networks

Pattern diversity antenna with high‐temperature tolerance for body area networks

Mesure des paramètres d’une antenne sous une température controllée

Mesure des paramètres d’une antenne sous une température controllée

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