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This paper introduces a broadband conductor-backed coplanar waveguide (CBCPW) to double-sided parallel strip line (DSPSL) transition structure. The performance is demonstrated in a back-to-back (B2B) configuration on 0.127 mm thick FR408 with relative permittivity of 3.75 and loss tangent of 0.018. AWR AXIEM and ANSYS HFSS simulations have been used to optimize all the structures. Simulation and measurement...
Low-profile, power-efficient antennas are required for body-worn devices applicable for long-term healthcare monitoring. The paper is focused on the fabrication of fold cylindrical helix (FCH) antennas, and measurement of their performance on the human body. The study considers one-element and two-element FCH arrays. It is found that the fabricated FCH antenna can excite the same on-body propagation...
This paper focuses on analyzing orbital angular momentum in radio frequency systems by studying Laguerre-Gaussian beams. A MATLAB toolkit for optics has been utilized to provide a predictive framework for generating and multiplexing signals that experience orbital angular momentum at 73 GHz. A horn antenna and spiral phase plates are used to verify MATLAB results. Comparing the two methods in terms...
The minimum phase property is of interest in broadband antennas, particularly pulse-forming antennas, because it determines whether it is feasible to perform broadband equalization of the antenna transfer function. We show that directional aperture antennas lose the minimum phase property at angles significantly off boresight, and give some simple analytical expressions for the angles within which...
This paper presents pyramidal horn antennas operating at 28 GHz, which are manufactured by 3D printing technology. A printed antenna based on a WR-28 waveguide standard gain horn designed for 20 dBi gain is then metalized using two different methods. Copper tape and conductive copper paint are applied to the 3D printed geometry surface. A full-wave electromagnetic simulator, HFSS, is used to design...
A new approach is introduced for wireless detection of electromagnetic signals generated at low frequencies on macula by light pulses. The signal detection is based on a resonant condition created externally and no part of the device touches the patient. Since most biological signals are excited at low frequencies, the proposed method will be applicable to other wireless detection systems including...
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