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Antennas can be classified in various ways, and various writers organize the different aspects of antennas with different priorities, depending on whether their text is most focused on specific frequency bands; or antenna size, construction, and placement feasibility; or explicating principles of radio theory and engineering that underlie, guide, and constrain antenna design.
A quadrant antenna is a 'V' antenna with an unusual overall length of a full wavelength, with two half-wave horizontal elements meeting at a right angle where it is fed. [14] Quadrant antennas produce mostly horizontal polarization at low to intermediate elevation angles and have nearly omnidirectional radiation patterns. [15]
For this, a new quadrant-antenna was installed for transmissions to Europe. Quadrant-Antenna (omnidirectional for 6 and 7 MHz) to serve central Europe. In the background are the main towers of the Wertachtal shortwave transmitter site. Other broadcasters using the site included Adventist World Radio from 1996, et Family Radio from 2001.
Antenna (radio) In radio engineering, an antenna (American English) or aerial (British English) is an electronic device that converts an alternating electric current into radio waves, or radio waves into an electric current. [1][2] It is the interface between radio waves propagating through space and electric currents moving in metal conductors ...
Monopulse radar is a radar system that uses additional encoding of the radio signal to provide accurate directional information. The name refers to its ability to extract range and direction from a single signal pulse. Monopulse radar avoids problems seen in conical scanning radar systems, which can be confused by rapid changes in signal strength.
A monopole antenna is a class of radio antenna consisting of a straight rod-shaped conductor, often mounted perpendicularly over some type of conductive surface, called a ground plane. [1][2][3] The driving signal from the transmitter is applied, or for receiving antennas the output signal to the receiver is taken, between the lower end of the ...
This is a list of television networks and stations in Indonesia. Since the establishment of TVRI , Indonesians could only watch one television channel. In 1989, the government allowed RCTI to broadcast as the first private television network in Indonesia, although only people who had a decoder could watch; it was opened to the public on 24 ...
Main contractor. PT Waskita Karya (Persero) Tbk. Kajima Corporation. The TVRI Tower (or Indonesian: Menara TVRI ) is a 144-meter high television transmitter tower located in Jakarta, Indonesia. Started construction on 1 April 1975 and completed on 24 August 1977, this tower was at one time one of the tallest structures in Jakarta and Indonesia.