Low Cost Prototype of an Outdoor Dual Patch Antenna Array for the Openly TV Frequency Ranges in Mexico (original) (raw)

Analysis of Different Types of Antenna for Television Network and Extracting C Band Channels

Asian Journal of Applied Science and Technology (AJAST), 2023

Television network is a system of transmitting and receiving television signals over a large area. Antenna is a device that converts electromagnetic waves into electric currents or vice versa. Antenna plays a crucial role in the performance and quality of television network. In this paper, we will analyze different types of antenna for television network, such as dipole antenna, yagi antenna, parabolic antenna and fractal antenna. We will compare their advantages and disadvantages, and suggest some criteria for choosing the best antenna for different scenarios. Dipole antenna is the simplest and most common type of antenna for television network. It consists of two metal rods or wires of equal length that are connected to a transmitter or receiver. Dipole antenna can receive signals from any direction in a horizontal plane, but has a low gain and a narrow bandwidth. Dipole antenna is suitable for local television stations or indoor applications. Yagi antenna is a directional antenna that consists of a dipole antenna and several parasitic elements, such as reflectors and directors. Yagi antenna can focus the signals in one direction and reject the signals from other directions, thus increasing the gain and reducing the interference. Yagi antenna has a moderate bandwidth and can be easily adjusted to different frequencies. Yagi antenna is suitable for long-distance television network or outdoor applications. Parabolic antenna is another directional antenna that consists of a parabolic reflector and a feed horn. Parabolic antenna can concentrate the signals into a narrow beam and achieve a high gain and a wide bandwidth. Parabolic antenna can also receive signals from satellites or other high-altitude sources. Parabolic antenna is suitable for satellite television network or high-definition television network. Fractal antenna is a novel type of antenna that uses fractal geometry to design its shape and structure. Fractal antenna can have multiple resonant frequencies and a large effective area, thus increasing the bandwidth and the efficiency. Fractal antenna can also have self-similarity and scalability, which means it can be miniaturized or enlarged without affecting its performance. Fractal antenna is suitable for digital television network or wireless communication network. In conclusion, different types of antenna have different characteristics and applications for television network. Depending on the factors such as distance, frequency, direction, interference, quality and cost, one can choose the best antenna for their specific needs.

Antenna Technology: Past, Present and Future

The evolution of antenna technology is reviewed, from the days of Marconi to the present. Various periods over which antenna technology has been revitalized are reviewed, and the various antenna configurations developed during those periods are summarized along with some of their respective key characteristics. The history starts at the beginning of the 20 th century and the respective technologies developed in the decades that follow are identified. Individuals that played a key role, especially during the early stages of antenna technology, are identified. Future trends and needs are speculated. Key technologies that will contribute to future advancements are identified and will be presented at the conference.

IJERT-Design Optimization of Yagi -Uda Antenna using Antenna Toolbox

International Journal of Engineering Research and Technology (IJERT), 2019

https://www.ijert.org/design-optimization-of-yagi-uda-antenna-using-antenna-toolbox https://www.ijert.org/research/design-optimization-of-yagi-uda-antenna-using-antenna-toolbox-IJERTCONV7IS11081.pdf The Yagi-Uda antenna is a widely used radiating structure for a variety of applications in commercial and military sectors. This antenna has been popular for reception of TV signals in the VHF-UHF range of frequencies [1]. The Yagi is a directional traveling-wave antenna with a single driven element, usually a folded dipole or a standard dipole, which is surrounded by several passive dipoles. The passive elements form the reflector and director. This paper optimizes a 6-element Yagi-Uda antenna for both directivity and 300 ohms input match using a global optimization technique. The radiation patterns and input impedance of antennas are sensitive to the parameters that define their shapes.