Title :
Double ridged horn antenna designs for wideband applications
Author :
Ghorbani, M. ; Khaleghi, A.
Author_Institution :
K.N. Toosi Univ. of Technol., Tehran, Iran
Abstract :
In this paper, different double ridged horn antenna (DRHA) designs are investigated for wideband applications. A classic design of 1-18 GHz DRHA with exponential ridges is modelled and the antenna pattern deficiencies are detected at frequencies above 12 GHz. The antenna pattern is optimized by modification of the antenna structure. However, the impedance matching is affected and the VSWR is increased at the frequencies below 2 GHz. The matching problem can be resolved by adding lossy materials to the back cavity of antenna. We have shown reduction of the antenna efficiency by 15% over the whole frequency range, except at the lower frequencies.
Keywords :
antenna radiation patterns; horn antennas; impedance matching; microwave antennas; DRHA designs; VSWR; antenna pattern deficiency; double ridged horn antenna designs; efficiency 15 percent; frequency 1 GHz to 18 GHz; impedance matching; wideband applications; Antenna radiation patterns; Broadband antennas; Cavity resonators; Electromagnetic compatibility; Horn antennas; Materials; Antenna; Double ridged horn; EMC tests; Wideband;
Conference_Titel :
Electrical Engineering (ICEE), 2011 19th Iranian Conference on
Conference_Location :
Tehran
Print_ISBN :
978-1-4577-0730-8
Electronic_ISBN :
978-964-463-428-4
