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This paper provides details on the design, fabrication and measurement of a beam steerable co-linear dipole array for mobile applications at the 28GHz frequency band. The array is designed and fabricated on an industry standard circuit board stack-up, including the non-high performance substrate layers. The 4-element array measures 7.5dBi peak gain and has a 3dB coverage of 90° in elevation and 25°...
This paper presents an embroidered body-worn antenna using conductive fibers (E-fibers). The antenna's conductive surfaces were fabricated using precise and automated embroidering techniques to produce fully flexible and conformal antenna elements attached to regular fabrics and clothing. These E-fiber antennas offer desirable mechanical properties without undermining electrical performance for body-worn,...
In this paper, the concept of a current sheet array (CSA) is expanded to design a broadband bowtie-shaped antenna array. The present approach has the potential to achieve a 7∶1 bandwidth over the VHF and UHF frequency bands with wide-angle beam. A 3 by 3 array of overlapping bowtie-shaped elements, with center feeding, was simulated. Printing was carried out on both faces of the dielectric slab and...
We present an omnidirectional UHF body-worn antenna specifically designed for vests worn by law enforcement agencies. Typically, body-worn antennas suffer from pattern nulling that decreases communication reliability. The proposed antenna system consists of a compact diversity module (794128 mm) and four antennas mounted on a typical body-worn vest to achieve an omnidirectional...
In this paper a dome-dipole antenna for ultra wideband operation is presensted. The antenna is a 3D generalization of the wideband flare dipole. For wideband impedance matching, the outer surface of the dome dipole was exponentially tapered. This design also led to a more uniform radiation pattern over larger bandwidth. Additionally, a 24" wide and 20" tall prototype of the dome-dipole antenna...
In this paper, we present new body-worn antennas specifically designed for armored vests used by the military and law enforcement agencies. Typically, these vests have hard ceramic reinforced plates protecting the abdomen. The proposed antennas are mounted on these plates. New designs are shown for front, back and side armor plates and the simulations are validated using measurements. A diversity...
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