Title :
Circularly polarised mode-converting antenna
Author :
Yuan, C.W. ; Liu, Q.X. ; Zhong, H.H. ; Qian, B.L. ; Li, Z.Q.
Author_Institution :
Coll. of Optoelectric Sci. & Eng., Nat. Univ. of Defense Technol., Changsha, China
Abstract :
A novel mode converter that transforms coaxial transverse electromagnetic mode into circularly polarised coaxial TE11 mode is proposed by inserting several metal plates into the coaxial waveguide. A circularly polarised mode-converting antenna with length of 36 cm and aperture diameter of 30.8 cm is designed by combining the mode converter with a special conical horn. The antenna has a gain of 19.2 dBi with an aperture efficiency of 50% and an axial ratio of 1.2 at 4 GHz. Measured results agree well with the simulated ones.
Keywords :
aperture antennas; coaxial waveguides; conical antennas; electromagnetic wave polarisation; horn antennas; 30.8 cm; 36 cm; 4 GHz; circular polarised coaxial mode; circularly polarisation; coaxial transverse electromagnetic mode; coaxial waveguides; conical horns; mode converters; mode-converting antenna;
Journal_Title :
Electronics Letters
DOI :
10.1049/el:20063673
