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Detail
Journal Article
Ka-band flat panel circularly polarized antenna array for LEO satellite communication systems
- Authors
- Woo-Hee Lim, Seong-Mo Moon, Han Lim Lee
- Issue Date
- 2023-09
- Citation
- AEJ - Alexandria Engineering Journal, v.78, pp.584-591
- ISSN
- 1110-0168
- Publisher
- Alexandria University
- Language
- English
- Type
- Journal Article
- Abstract
- In this paper, a high gain circularly-polarized antenna array with a flat panel structure for low Earth orbit (LEO) satellite communication systems is proposed. This new CP structure can efficiently achieve high directivity and can easily be integrated with beamforming ICs (BFIC) when designing an antenna module, resulting in a good candidate for Ka-band satellite communications. Furthermore, the proposed FPAA can easily be extended to a larger scale array from a base unit in a 2 × 2 sub-array structure. Each sub-array is configured by four high-gain planar segmented antenna (PSA) elements with a sequentially rotating arrangement, where a single 4-channel BFIC can drive CP radiation. Unlike previously reported PSA elements that have limited CP performance, the proposed PSA-CP configuration adopts additional conductors and ground-via structures to further improve the CP gain, axial-ratio (AR), and cross-polarization (XPD) characteristics. To verify the performance of the proposed PSA-CP, a 2 × 2 left-hand circular polarization (LHCP) sub-array was fabricated at 28 GHz and tested with a BFIC. The measured 10-dB impedance and 3-dB AR bandwidths of the proposed 2 × 2 array were 13.92% and 12.5%, respectively. In addition, the measured peak gain was 15.2 dBic at 28.5 GHz with an XPD level of less than 15 dB.
- KSP Keywords
- 28 GHz, 5 GHz, Axial Ratio, Cross polarization(CP), High Gain, High directivity, Ka-Band, Left-hand circular polarization(LHCP), Low earth orbit (LEO) satellite, Panel structure, antenna array
This work is distributed under the term of Creative Commons License (CCL)
(CC BY NC ND)
(CC BY NC ND)
