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Design and development of Bluetooth antenna for compact application.

Tushar Mansingrao Desai
  • Technical Paper
  • 2019-28-2432
To be published on 2019-11-21 by SAE International in United States
This paper presents the design of Inverted F antenna and its effects in size, efficiency and compactness. The antenna is analyzed in terms of return loss, bandwidth, directivity and gain by using same and different dielectric substrate materials with same and different thickness of Inverted F antenna. The important parameters of Inverted F antenna are L, W, S and ξr has its own impact in antenna characteristics. This parametrical effect is studied and verified. As thickness of dielectric substrate increases, the gain & directivity of rectangular Inverted F antenna decreases and bandwidth increases. As ξr increases, the size of the antenna decreases but when height of dielectric substrate increase antenna size also increases. There will be always a compromise between miniaturization and other antenna characteristics. This antenna is designed for microstrip feed line technique and with center frequency (f0) at 2.4GHz. The parametric analysis is obtained by comparing the simulated results of Inverted F antenna for different cases. The proposed antenna is simulated using ADS tool at resonance frequency of 2.4 GHz.
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Determine Thermal Fatigue Requirements for PEPS Antenna Copper Wire over Vehicle Lifetime with defined Reliability Requirements.

GMTCI-Abhinav Jauhri
  • Technical Paper
  • 2019-28-2582
To be published on 2019-11-21 by SAE International in United States
Reliability states the degree to which the result of a measurement, calculation, or specification can be depended on to be accurate. And, tests according to GMW specifications represents a minimum of 15 years of vehicle life time with defined Reliability and Confidence level. In this work, actual number of thermal cycles for Thermal Fatigue tests (Thermal Shock and Power Temperature Cycle) are calculated for Copper Wire whose Coffin Manson exponent is 5. Overstressing the PEPS Antenna under thermal fatigue requirement (defined number of thermal cycles based on Reliability and Confidence requirements) will lead to broken Copper wire which will result in component’s functional failure and thus impossible to continue reliability testing. The objective of this paper is to determine thermal fatigue requirements for Antenna’s Copper wire whose Coffin Manson exponent is 5. Testing with exact number of thermal cycles will reduce the validation failures owing to broken Copper wire and thus save incurred revalidation cost. The current study is limited to only adjusting the thermal fatigue requirements (Number of Thermal Cycles) for only specific E/E…
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Shape-Shifting Origami Could Help Antenna Systems Adapt On-the-Fly

Aerospace & Defense Technology: September 2019

  • Magazine Article
  • 19AERP09_05
Published 2019-09-01 by SAE International in United States

Conventional reconfigurable electrical and radio frequency (RF) structures commonly used in applications involving real-time reconfigurability in response to fast varying operational scenarios require specialized substrates or complex electrical circuits. Origami-based RF reconfigurable components and modules offer a solution with unique properties. First, they enable reconfigurability over continuous-state ranges (as opposed to discrete states). Second, they do not require specialized mechanical support for multilayer frequency-selective surface structures. Moreover, deployable origami-based RF structures can achieve large surface reconfigurability ratios from folded to unfolded states. Finally, these structures allow for independent control of multiple figures of merit: bandwidth, frequency of operation, and angle of incidence.

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Hybrid Ultra-Low VOC and Non-HAP Rain Erosion Coatings

  • Magazine Article
  • TBMG-34877
Published 2019-08-01 by Tech Briefs Media Group in United States

Numerous military aircraft and shipboard surfaces, such as radomes, antennas, gun shields, wing leading edges, and helicopter blade leading edges, are coated with a specialized erosion-resistant protective coating possessing strict performance requirements. These protective coatings must provide excellent rain erosion resistance, superior mechanical properties, good adhesion to the substrate and meet a host of other metrics outlined in MIL-PRF-32239 and SAE AMS-C- 83231A.

Products of Tomorrow: July 2019

  • Magazine Article
  • TBMG-34757
Published 2019-07-01 by Tech Briefs Media Group in United States

This column presents technologies that have applications in commercial areas, possibly creating the products of tomorrow. To learn more about each technology, see the contact information provided for that innovation.

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Multi-Agent RF Propagation Simulator

Aerospace & Defense Technology: June 2019

  • Magazine Article
  • 19AERP06_07
Published 2019-06-01 by SAE International in United States

Adesirable interface between multiagents is through over-the-air RF connections that include not only the intended direct RF communications paths but also highly variable multiray propagation, range attenuation, external RF influences, and near-earth influence. These influences are all difficult to predict, control, and repeat in an outdoor environment. This outdoor testing, as has traditionally been done, is extremely expensive while simultaneously providing fewer data points than more controlled events and the testing events are generally not repeatable.

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Multi-Agent RF Propagation Simulator

  • Magazine Article
  • TBMG-34531
Published 2019-06-01 by Tech Briefs Media Group in United States

A desirable interface between multi-agents is through over-the-air RF connections that include not only the intended direct RF communications paths but also highly variable multi-ray propagation, range attenuation, external RF influences, and near-earth influence. These influences are all difficult to predict, control, and repeat in an outdoor environment. This outdoor testing, as has traditionally been done, is extremely expensive while simultaneously providing fewer data points than more controlled events and the testing events are generally not repeatable.

Q&A: Dr. Mahmooda Sultana, Multifunctional Sensor Researcher/Engineer at NASA Goddard

  • Magazine Article
  • TBMG-34405
Published 2019-05-01 by Tech Briefs Media Group in United States

Dr. Sultana won funding to advance a nanomaterial-based detector platform that can sense environmental parameters from minute concentrations of target gases and vapors, to atmospheric pressure and temperature, and then transmit that data via a wireless antenna — all from the same 3 × 5’’ self-contained platform.

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Antenna Design Methodology for Remote Keyless Entry: The Effects of the Human Body and Vehicular Antenna Positions on Coverage

Altair Engineering-Dipen Kumar Das, Aseim Elfrgani
Published 2019-04-02 by SAE International in United States
In this era of technologies, Remote Keyless Entry (RKE) system has become an integral part of motor vehicles. Over the years, a lot of functionalities have been added to RKE systems. To achieve functional communication between key-fob antennas and vehicular receiving antennas, it is necessary to analyze the impact of a human body as well as the receiving antenna placements on the vehicle’s body. Taking these variations into account during the antenna development phase becomes expensive and tedious since achieving an efficient design would require several iterations, testing, and modification, in the design. Hence, Computational Electromagnetic (CEM) techniques become a feasible solution to explore such scenarios and adopt necessary modifications as needed. This paper introduces a methodological process of designing RKE antennas using 3D CEM Simulation tool; namely Altair Feko. Moreover, the presented methodology includes an analysis of variations of remote keyless entry system’s radiation characteristics while placed in the vicinity of the human body. The effects of the vehicular receiving antenna position on the RKE system’s coverage are also investigated and analyzed. This paper…
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A Three-Dimensional Inverted-F Antenna as a LTE Antenna in a Rooftop Antenna Module

TE Connectivity-Jane X. Yun
Published 2019-04-02 by SAE International in United States
The demand for wireless connectivity of vehicles is growing rapidly. Today, a typical modern vehicle may have more than 10 antennas to provide wireless services. Some of these antennas can be mounted on the rooftop of the vehicle to access to an open field of view from the horizon to the sky. A rooftop antenna module integrates several antenna elements into one package for different services, such as broadcast radio, satellite digital audio radio service (SDARS), global navigation satellite system (GNSS), long-term evolution (LTE), Wi-Fi, Car-2-Car communications, etc.However, the rooftop location limits the allowable size and the shape of the antenna module, because these features must have acceptable minimal impacts on the aerodynamic performance of a vehicle. This size limitation brings challenges to the designs of the antenna elements packaged in the same antenna module. Besides meeting each antenna’s performance requirements, an important design goal is to minimize the mutual couplings between the antenna elements. A known challenge is to minimize the impacts from other antenna elements to the SDARS antenna in the rooftop antenna…
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