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We present a new fractal slot edge antipodal Vivaldi antenna (AVA). When compared to a conventional AVA, it simultaneously extends the low‐end bandwidth limitation, mitigates the side lobe level, and increases the main lobe gain. © 2016 Wiley Periodicals, Inc. Microwave Opt Technol Lett 59:337–346, 2017

Subjects related to electromagnetics in undergraduate electrical engineering courses are normally seen as problematic by students, due to the inherent complexity and abstract concepts. The effect is that students are drawn away from related research areas. Some approaches were developed to enhance the motivation and physical insight of the concepts seen in class. Electromagnetic compatibility is used as a source of real world examples where students see that applied electromagnetics is not a field unrelated with their experiences. In addition to that, final projects with handmade antennas help guide students through a complete design cycle, from analytical formulation to the actual measurement, so that the connections concerning the theory, simulation, prototyping, and measurements are closed. These techniques were applied and provided good results, increasing the understanding and motivation among students toward radio-frequency and antenna-related areas.

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Abstract-We present a new Ultra Wide Band (UWB) TimedArray Transmitter System with Beamforming capability for high-resolution remote acquisition of vital signals. The system consists of four identical channels, where each is formed of a serial topology with three modules: programmable delay circuit (PDC or τ), a novel UWB 5 th Gaussian Derivative order pulse generator circuit (PG), and a planar Vivaldi antenna. The circuit was designed using 0.18µm CMOS standard process and the planar antenna array was designed with filmconductor on Rogers RO3206 substrate. Spice simulations results showed the pulse generation with 104 mVpp amplitude and 500 ps width. The power consumption is 543 µW, and energy consumption 0.27 pJ per pulse using a 2V power supply at a pulse repetition rate (PRR) of 100 MHz. Electromagnetic simulations results, using CST Microwave (MW) Studio 2011, showed the main lobe radiation with a gain maximum of 13.2 dB, 35.5º x 36.7º angular width, and a beam steering between 17º and -11º for azimuthal (θ) angles and 17º and -18º for elevation (φ) angles at the center frequency of 6 GHz.