A novel circularly polarized waveguide slot array for satellite communications is proposed. The antenna features a unique feeding network and a unit cell that consists of a pair of simple T-shaped waveguide slots. The proposed configuration not only eliminates grating lobes, which are often seen in conventional waveguide slot arrays, but also simplifies the fabrication process without any sacrifice in the performance, while also allowing scalability. A prototype 6 × 8 array antenna is designed at 29.5 GHz, and fabricated by dip brazing. A high gain of 21.9 dBi and a -10 dB impedance bandwidth of 1 GHz are achieved with an axial ratio (AR) of 1.3 dB without any grating lobes. The measured results are in very good agreement with the simulated results.
Bibliographical noteFunding Information:
Manuscript received October 31, 2019; revised December 10, 2019; accepted December 12, 2019. Date of publication December 23, 2019; date of current version February 6, 2020. This work was supported by the Intellian Technologies Inc. (Corresponding author: Yongshik Lee.) K. C. Dimitrov, Y. Lee, and B.-W. Min are with the Department of Electrical and Electronic Engineering, Yonsei University, Seoul 03722, South Korea (e-mail: email@example.com; firstname.lastname@example.org; email@example.com).
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All Science Journal Classification (ASJC) codes
- Electrical and Electronic Engineering