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A Ka-Band Circular Polarized Waveguide Slot Antenna with a Cross Irisopen access
- Authors
- Yoon, Sung-Joon; Choi, Jaehoon
- Issue Date
- Oct-2020
- Publisher
- MDPI
- Keywords
- waveguide antenna; slot antenna; circular polarization; axial ratio enhancement
- Citation
- APPLIED SCIENCES-BASEL, v.10, no.19, pp.1 - 15
- Indexed
- SCIE
SCOPUS
- Journal Title
- APPLIED SCIENCES-BASEL
- Volume
- 10
- Number
- 19
- Start Page
- 1
- End Page
- 15
- ISSN
- 2076-3417
- Abstract
- Featured Application Segment waveguide slot antenna for a satellite communication and radar. A Ka-band circularly polarized (CP) waveguide slot antenna with a cross iris is proposed. To achieve the CP characteristic (LHCP) in the antenna, a hexagonal shaped cavity is used. The impedance matching is improved by adjusting the sizes of the hexagonal cavity and a rectangular matching cavity. To enhance the axial ratio bandwidth, a cross iris is used with two arms of different lengths. From experimental results, the proposed antenna has a 3 dB axial ratio bandwidth of 6810 MHz (31.72 GHz-38.53 GHz). The -10 dB reflection coefficient bandwidth of the proposed antenna ranges from 31.51 GHz to 39.21 GHz (7700 MHz).
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