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International Journal of Antennas and Propagation
Volume 2013, Article ID 747629, 12 pages
http://dx.doi.org/10.1155/2013/747629
Research Article

A Small Ku-Band Polarization Tracking Active Phased Array for Mobile Satellite Communications

1Institute of Communication Engineering, PLA University of Science and Technology, Nanjing 210016, China
2Antenna Research Laboratory, Nanjing Telecommunication Technology Institute, Nanjing 210007, China
3State Key Laboratory of Millimeter Waves, Southeast University, Nanjing 210096, China
4Department of Micro-systems, Nanjing Electronic Device Institute, Nanjing 210096, China

Received 19 April 2013; Revised 21 September 2013; Accepted 22 September 2013

Academic Editor: Z. N. Chen

Copyright © 2013 Wei Shi et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

A compact polarization tracking active phased array for Ku-band mobile satellite signal reception is presented. In contrast with conventional mechanically tracking antennas, the approach presented here meets the requirements of beam tracking and polarization tracking simultaneously without any servo components. The two-layer stacked square patch fed by two probes is used as antenna element. The impedance bandwidth of 16% for the element covers the operating frequency range from 12.25 GHz to 12.75 GHz. In the presence of mutual coupling, the dimensional parameters for each element of the small 7 × 7 array are optimized during beam scanning and polarization tracking. The compact polarization tracking modules based on the low-temperature cofired ceramic (LTCC) system-in-package (SiP) technology are proposed. A small active phased array prototype with the size of 120 mm (length) × 120 mm (width) × 55 mm (height) is developed. The measured polarization tracking patterns of the prototype are given. The polarization tracking beam can be steered in the elevation up to 50°. The gain of no less than 16.0 dBi and the aperture efficiency of more than 50% are obtained. The measured and simulated polarization tracking patterns agreed well.