The Active Loop Antenna Model ALA100HG is a large aperture antenna designed to provide improved performance compared to traditional active and passive antennas. The ALA100HG has two modes of operation; at Medium and Low Frequencies the antenna is a high efficiency broadband Loop; for High frequencies the antenna has a response similar to a Longwire. The ALA100HG is primarily designed to reduce ...

In this paper several developments in RF front end technology based upon the active antenna concept are presented. RF front ends utilizing active antenna concepts have shown improvements in such areas as power added efficiency, compactness, low noise figure, and increased func-tionality. These improvements are illustrated in this paper with a Class F transmitter with integrated circular patch a...

in this paper a new low profile substrate integrated waveguide (siw) probe-fed h-plane horn antenna structure with improved gain is proposed. the proposed antenna consists of two waveguides including a rectangular and a taper one, in which both, first and third modes of the structure are simultaneously excited leading to a uniform field distribution along the radiating aperture of the antenna a...

This paper shows that an optimal antenna pattern for active phased array synthetic aperture radar (SAR) has been synthesized to meet the best performances based on particle swarm optimization (PSO) and adaptively selected weighting factors. Because the antenna radiation pattern has a very close relation with the performance of an active phased array SAR system, the authors derived the multi-obj...

Microwave systems like radar, missile guidance and communication equipment which require large amplifiers to produce high power beam, wave-guides for its low loss and higher power capabilities and motors for scanning are bulky, occupy large space and are not easily routed. Most efficient replacements have been found in the active antenna array where active devices are integrated directly into t...

Source: Robot whiskers used to sense features-Seals track the hydrodynamic trails of their prey w w w .d o c u-tra c k .c o m Conclusions • 3D flow patterns possible (complex config.) • Animals also use information about moment –Recordings rat trigeminal ganglion –At whisker base à could be low frequency counterpart to the whisker vibrations

Abstract— This work investigates the improvement of the active reflection coefficient of waveguide-fed phased-array antenna using liquid crystal layers. The anisotropy properties of liquid crystal layer can be employed to eliminate blind scan angle and improve the wide angle impedance matching of the waveguide-fed phased array antennas. The authors have expressed the modal analysis of the waveg...

An antenna integrated sensor implementation for hand or finger proximity recognition is developed. Capacitive sensor was installed on the antenna of functional Nokia 6021 phone. The sensitivity of the phone with planar inverted F antenna (PIFA) integrated sensor was measured with active TRP (total radiated power) and TIS (total isotropic sensitivity) measurements. Phone active measurements were...