Question
Download Solution PDFThe discone antenna is
Answer (Detailed Solution Below)
Detailed Solution
Download Solution PDFExplanation:
- The discone antenna or discone aerial is often used where an omnidirectional wideband or bandwidth RF antenna design is needed.
- The discone antenna is used for many radio communication applications from radio scanning and monitoring for commercial or military services to the home scanner enthusiasts.
- Given their size, weight, and windage or wind resistance, these antennas are normally used for frequencies above 30 MHz (VHF Range)
A discone antenna consists of three main parts: the disc, the cone, and the insulator.
The disc: The disc should have an overall diameter of 0.7 times a quarter wavelength of the antenna's lowest frequency. The antenna's feed point is at the center of the disc.
The cone: The length of the cone should be a quarter wavelength of the antenna's lowest operating frequency.[2] The cone angle is generally from 25 to 40 degrees.
The insulator: The disc and cone must be separated by an insulator, the dimensions of which determine some of the antenna's properties, especially near its high-frequency limit.
Last updated on Jun 23, 2025
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