Design of Circularly-Polarized Cavity-Backed Slot Array Antenna Using Higher-Order Mode Excitation Based on Gap Waveguide Technology

2018 ◽  
Author(s):  
Ali Keivaan ◽  
Homayoon Oraizi ◽  
Amrollah Amini
Keyword(s):  
Higher Order ◽  
Array Antenna ◽  
Order Mode ◽  
Circularly Polarized ◽  
Mode Excitation ◽  
Higher Order Mode

Circularly polarized high-power antenna with higher-order mode excitation

2021 ◽  
pp. 1-5
Author(s):  
Swati Varun Yadav ◽  
Ashish Chittora
Keyword(s):  
High Power ◽  
Mode Conversion ◽  
Axial Ratio ◽  
High Gain ◽  
Higher Order ◽  
Order Mode ◽  
Circularly Polarized ◽  
Metal Plates ◽  
Mode Excitation ◽  
Higher Order Mode

Abstract A circularly polarized high-power antenna with higher-order mode excitation (TM01) is presented in this paper. The proposed structure consists of metal plates placed on the conical horn antenna's aperture for achieving TM01 to circular polarized TE11 mode conversion at the output. The structure is simulated on CST Microwave Studio. The designed antenna exhibits high gain and a directive radiation pattern. The axial ratio of the proposed structure is below 3 dB. The simulated and measured reflection coefficient for TM01 mode excitation is below −10 dB over a frequency range of 2.95–3.13 GHz. The structure is purely metallic, and the calculated high-power microwave (HPM) capability is up to the MW level. The proposed antenna is helpful for portable HPM systems.

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