A MEMS reconfigurable pixel microstrip patch antenna for conformal load bearing antenna structures (CLAS) concept

Ali, Mohd. Hasan; Bishop, Nicholas A.; Baron, William; Smyers, Brian; Tuss, James; Zeppettella, David

doi:10.1109/aps.2014.6904873

Cited by 15 publications

(14 citation statements)

References 7 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Figure 4b shows the radiation pattern with a gain of 4.26 dB for Configuration 1, 3.52 dB for configuration 2 and 4.35 dB for configuration 3. This result is comparable to the gain of 5 dB attained with RO 4003 (Ɛ r = 3.55, tan δ = 0.002) substrate reported in [3].…”

Section: Modelling and Simulation In Hfss Softwaresupporting

confidence: 87%

See 1 more Smart Citation

A low profile reconfigurable antenna for defense aircrafts

et al. 2019

View full text Add to dashboard Cite

In this paper a low profile frequency reconfigurable antenna is proposed that can conform to the host surface. The proposed design is a pixelated antenna structure with a grid of small metallic patches with RF switches for re-configurability. The prototype of the proposed design is designed on an FR4 substrate with the relative dielectric constant of 4.4 and thickness of 1.6 mm. This antenna is capable of resonating in three different frequencies. The prototype resonates at 10 GHz with return loss of − 12.47 dB and gain of 4.35 dB, 3.9 GHz with return loss of − 19.95 dB and gain of 3.52 dB and 2.6 GHz with a return loss of − 14.22 dB and gain of 4.26 dB. The simulated result shows that the gain of the pixel antenna on FR4 substrate ~ 4 dB comparable to gain attained by pixel antenna on substrates with low tangent loss and low dielectric constant. It is observed that the measured results are in good agreement with the simulated result.

show abstract

Section: Modelling and Simulation In Hfss Softwaresupporting

confidence: 87%

“…Pixel patch antennas are one of the most promising antenna architectures for the next generation of reconfigurable antenna [2]. It consists of a grid of electrically small metallic patches where each pair of adjacent patches is interconnected by RF MEMS switch [3].…”

Section: Introductionmentioning

confidence: 99%

A low profile reconfigurable antenna for defense aircrafts

et al. 2019

View full text Add to dashboard Cite

show abstract

“…Generally, composites with programmable strength properties can be used where it is not necessary to transfer loads on the entire surface of the composite, but only on selected fragments, such as beams, ribs, and mesh stiffeners [19]. The composites obtained in this way can be used in the automotive industry, for example, as a car spare wheel, having a lower weight than its steel counterpart, alternator covers, and elements reinforcing the seat belt attachment points [28]. On the other hand, in the aviation industry, composites based on embroidered structures have been used as a conformal structure of a carrier antenna (CLAS), providing, on the one hand, Wi-Fi communication and, on the other hand, radar scanning of space in order to avoid collisions [29][30][31][32][33].…”

Section: Introductionmentioning

confidence: 99%

Experimental Study of Soft Ballistic Packages with Embroidered Structures Fabricated by Using the Tailored Fiber Placement Technique

Gloger

Stempień

2022

Materials

View full text Add to dashboard Cite

Textile ballistic shields are the basis of protection against bullets and fragments with low kinetic energy. They are usually made of para-aramid fabrics or unidirectional structure (UD) sheets of ultra-high molecular weight polyethylene (UHMWPE). The aim of the research presented in the article was to obtain ballistic packages made of embroidered structures and to compare their ballistic properties with those of woven structures in terms of deformation of the standardized ballistic substrate after impact with a 9 mm bullet at a velocity of 380 ± 3 m/s. Using the tailored fiber placement method, embroidered structures were fabricated by embroidering two sets of para-aramid threads at an angle of 90°. As the woven structures, the use of para-aramid fabric made of the same yarn and with a surface weight comparable to that of embroidered structures was adopted. Ballistic packages consisted of 26 layers in five variants, also taking into account the hybrid arrangement of woven and embroidered layers. Ballistic tests have shown that the best ballistic properties have hybrid packages made by folding 13 woven and then 13 embroidered layers, where the maximum deformation of the plasticine substrate is below 23 mm. The conducted research confirmed that embroidered structures in appropriate combination with woven structures can significantly improve the ballistic properties of textile packages.

show abstract

“…Past efforts to achieve a programmable conducting surface generally fall into two categories: either patterning a PCM film with a spatially programmable heater array as was simulated in [9], [10], or interconnecting conducting regions with switches. The conducting regions are either traditional microwave structures such as patch antennas [11], [12] or dipole arrays [13], or they are sub-wavelength metallic structures as proposed in [14]. This continuum is depicted in Fig.…”

Section: Introductionmentioning

confidence: 99%

Dynamically Reconfigurable Microwave Circuits Leveraging Abrupt Phase-Change Material

Connelly,

Chisum

2020

Preprint

View full text Add to dashboard Cite

This article proposes a concept for dynamically reconfigurable distributed microwave circuits by leveraging the abrupt conductivity transition in phase-change materials (PCM). Metallic surface-inclusions ( λ) are embedded in the PCM film-vanadium dioxide (VO2)-to provide low-loss and reconfigurability. To validate this concept, a variety of co-planar waveguide transmission lines are designed and fabricated with metallic surface-inclusions in VO2 films, and the lines' performance are characterized up to 50 GHz. The measured results are used to develop a transmission-line based model and an equivalent circuit model of the VO2 with surface-inclusions to aid in the rapid design of new structures. Additionally, an electromagnetic model was developed and indicates that loss can be close to that of conventional metallic distributed circuits with 100 to 200 nm thick VO2 films. With these thicker films, two practical realizations of this concept were designed and simulated: a tunable dipole from 2.13 to 9.07 GHz and a tunable triple-stub matching network from 5 to 40 GHz with high |Γ|. Therefore, the proposed method appears viable for the realization of arbitrary programmable distributed circuits and antennas in the microwave and lowmillimeter-wave bands.

show abstract

A MEMS reconfigurable pixel microstrip patch antenna for conformal load bearing antenna structures (CLAS) concept

Cited by 15 publications

References 7 publications

A low profile reconfigurable antenna for defense aircrafts

A low profile reconfigurable antenna for defense aircrafts

Experimental Study of Soft Ballistic Packages with Embroidered Structures Fabricated by Using the Tailored Fiber Placement Technique

Dynamically Reconfigurable Microwave Circuits Leveraging Abrupt Phase-Change Material

Contact Info

Product

Resources

About