This paper presents the design and preliminary testing results of a linear polarization HF monitoring very compact lightweight active phased array that produces a radiation pattern with a sufficient front-to-back ratio specially designed to be installed in locations where limited space imposes a limitation. A similar limitation applies for the dipoles of the Log Periodic antenna. The goal of this laboratory is to learn some useful features of the Multisim simulation software and to highlight some differences between the computations as they are done in class and the results of Multisim simulations and benchtop experiments. You should obtain something similar to Figure 1b graph. Sketch the Bode plot of the magnitude frequency response of the CS amplifier from Figure 3. To display a Bode plot of the output voltage, including phase. Directional HF antennas, like the Yagi, that employs passive elements such as reflectors and directors cannot be shorter than the proper dimensions and still function properly. Find the high 3dB frequency and open-circuit (RL ) gain-BW product for CL 20 pF. Figure 20 dB magnitude curves for gain at Mid and Out. Although an HF short dipole's efficiency is lower than the half wave dipole, it can be enhanced by the use of active circuits for usable monitoring purposes. This is because an HF antenna must be designed around the proper wavelengths to operate at a satisfactory efficiency, especially when a certain level of directivity is also a requirement. One of the most vital issues regarding the installation of HF antennas is their sizable dimensions.
