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Article

A Low-Profile Dual-Polarized High-Gain Low Cross-Polarization Phased Array for Ku-Band Satellite Communications

by
Yuhan Huang
1,2,
Jie Zhang
1,2,*,
Xiuping Li
2,3,4,5,*,
Zihang Qi
2,3,4,5,
Fan Lu
1,
Hua Jiang
1,
Xin Xue
1,
Hua Zhu
6 and
Xiaobin Guo
2,3,4,5
1
Beijing Institute of Spacecraft System Engineering, Beijing Engineering Research Center of EMC and Antenna Test Technology, Beijing 100094, China
2
School of Electronic Engineering, Beijing University of Posts and Telecommunications, Beijing 100876, China
3
State Key Laboratory of Information Photonics and Optical Communications, Beijing 100876, China
4
Key Laboratory of Universal Wireless Communications of Ministry of Education, Beijing 100876, China
5
Beijing Key Laboratory of Work Safety Intelligent Monitoring, Beijing 100876, China
6
Key Laboratory of Optoelectronic Devices and Systems of Ministry of Education and Guangdong Province, College of Physics and Optoelectronic Engineering, Shenzhen University, Shenzhen 518060, China
*
Authors to whom correspondence should be addressed.
Sensors 2025, 25(13), 3986; https://doi.org/10.3390/s25133986
Submission received: 13 May 2025 / Revised: 13 June 2025 / Accepted: 15 June 2025 / Published: 26 June 2025
(This article belongs to the Special Issue Design and Measurement of Millimeter-Wave Antennas)
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Abstract

A low-profile dual-polarized shared-aperture phased array antenna is proposed for Ku-band satellite communications in this paper. The stacked octagonal patches loaded with Via-rings are proposed as dual-polarized shared-aperture radiation elements, with the characteristics of wide impedance bandwidth, high gain, and weak coupling. Furthermore, innovative minimized three-port ring couplers are utilized for the differential-fed antenna array, further suppressing the cross-polarization component. Substrate integrated coaxial line (SICL) and microstrip line (MS) feed networks are employed for the excitation of transmitting band (Tx) horizontal polarization and receiving band (Rx) vertical polarization, respectively. The non-uniform subarray architecture is optimized to minimize the sidelobe levels with the reduced number of transmitter and receiver (T/R) radio frequency phase-shifting modules. As proof-of-concept examples, 16 × 24 and 32 × 24 array antennas are demonstrated and fabricated. The measured impedance bandwidths of the proposed phased array antennas are around 21.1%, while the in-band isolations are above 36.7 dB. Gains up to 29 dBi and 32.4 dBi are performed by two prototypes separately. In addition, the T/R phase-shifting modules are utilized to validate the beam-scanning characteristic, which is of value for dynamic satellite communications.
Keywords: dual-polarized; phased array; Ku-Band satellite communications; shared-aperture; nonuniform subarray; differential-fed; substrate integrated coaxial line dual-polarized; phased array; Ku-Band satellite communications; shared-aperture; nonuniform subarray; differential-fed; substrate integrated coaxial line

Share and Cite

MDPI and ACS Style

Huang, Y.; Zhang, J.; Li, X.; Qi, Z.; Lu, F.; Jiang, H.; Xue, X.; Zhu, H.; Guo, X. A Low-Profile Dual-Polarized High-Gain Low Cross-Polarization Phased Array for Ku-Band Satellite Communications. Sensors 2025, 25, 3986. https://doi.org/10.3390/s25133986

AMA Style

Huang Y, Zhang J, Li X, Qi Z, Lu F, Jiang H, Xue X, Zhu H, Guo X. A Low-Profile Dual-Polarized High-Gain Low Cross-Polarization Phased Array for Ku-Band Satellite Communications. Sensors. 2025; 25(13):3986. https://doi.org/10.3390/s25133986

Chicago/Turabian Style

Huang, Yuhan, Jie Zhang, Xiuping Li, Zihang Qi, Fan Lu, Hua Jiang, Xin Xue, Hua Zhu, and Xiaobin Guo. 2025. "A Low-Profile Dual-Polarized High-Gain Low Cross-Polarization Phased Array for Ku-Band Satellite Communications" Sensors 25, no. 13: 3986. https://doi.org/10.3390/s25133986

APA Style

Huang, Y., Zhang, J., Li, X., Qi, Z., Lu, F., Jiang, H., Xue, X., Zhu, H., & Guo, X. (2025). A Low-Profile Dual-Polarized High-Gain Low Cross-Polarization Phased Array for Ku-Band Satellite Communications. Sensors, 25(13), 3986. https://doi.org/10.3390/s25133986

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