![]() They often consist of a single ‘feed’ or ‘driven’ element, typically a dipole or a folded dipole antenna. ![]() Yagi antenna is a directional antenna consisting of multiple parallel elements in a line. Thus, they are often used in communication systems.Ī monopole antenna is one-half of a dipole antenna, mounted perpendicularly over some type of conductive surface, called a ground plane.The directivity (gain) of a monopole antenna is twice the directivity of a dipole antenna of twice the length because no radiation occurs below the ground plane hence, the antenna is effectively twice as “directive”, due to higher directivity a monopole antenna can transmit wave further distance with similar transmitting power. So the length of the dipole elements is determined by the wavelength of the radio waves used.ĭipoles are Omni-directional antennas. Dipoles are resonant antennas, meaning that the elements serve as resonators, with standing waves of radio current flowing back and forth between their ends. Each side of the feedline to the transmitter or receiver is connected to one of the conductors. Antennas are often distinguished by their beam shape and efficiency.Ī dipole antenna or doublet is the simplest and most widely used class of antenna.It consists of two identical conductive elements such as metal wires or rods, which are usually bilaterally symmetrical.The driving current from the transmitter is applied, or for receiving antennas the output signal to the receiver is taken, between the two halves of the antenna. During the reception, or listening time, the function of the antenna is to collect the returning radar energy, contained in the echo signals, and deliver these signals to the receiver. The function of the antenna during transmission is to concentrate the radar energy from the transmitter into a shaped beam that points in the desired direction. Apart from that, in this video working of Raster Scan display, advantages, disadvantages, and application area also discussed in detail.Antenna is an electrical device which converts electric power into radio waves, and vice versa, antenna are used not only on radar but also on jammers, RWR and communication system. On the opposite hand, within the random scan, the non-particulate radiation is guided on simply those regions of the screen wherever the image really lies. The most distinction between a raster scan and a random scan lines within the drawing of an image wherever the raster scan points the non-particulate radiation at the whole screen however incorporating only one line at a time within the downward direction. Raster Scan associated with a degree and random scan square measure the mechanisms employed in displays for rendering the image or picture. This video also focused on the difference between the Raster Scan display and the Random Scan display. Typically display processors are utilized to interface input devices, such as mice, joysticks. Display processors can perform various other tasks like creating different line styles, displaying color areas, etc. The purpose of display processors is to relieve the CPU from graphics jobs. This process is referred to as scan conversion. An important function of the Raster-Scan display process is to digitize a picture definition given in an application program into a set of pixel intensity values for storage in the refresh buffer. This video focused on Raster Scan Display. In a raster scan system electron beam sweeps across the screen, from top to bottom covering one row at a time. Raster Scan Displays are the most common type of graphics monitor which employs CRT. The rendering can be done in this manipulation and creation of the new image and hence computer graphics is used. Computer Graphics is the manipulation of the image in a pictorial manner.
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