Abstract
This article presents a new design of a differentially fed substrate integrated planar antenna array with dual-polarization. Compared with the traditional dual-polarized antenna arrays, the proposed array antenna has the advantages of simple configuration, high cross-polarization discrimination (XPD), and high gain. The 2×2-element subarray design with a via-loaded crossover structure is used, which reduces the complexity of the array antenna. The operation bandwidth is improved by generating three resonances in the subarray. An 8×8 antenna array is designed, prototyped, and tested to exemplify its potential applications in large dual-polarized antenna arrays. A planar orthomode transducer is used to achieve differential excitation for the antenna array. The measured results show that the proposed antenna array has an impedance bandwidth of 19.2-20.7 GHz for |S <sub xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">11</sub> | <; -10 dB and port isolation higher than 20 dB. The array antenna exhibits a high XPD of 43 dB and a flat gain of about 22.2 dBi within the bandwidth.
Highlights
T O meet the requirements from various scenarios, the wireless communications have increasing demand for high data rate and multi-functionality [1]–[3]
In order to enhance the operation bandwidth, triple resonance is excited in the subarray antenna
The separations between the antenna elements are larger than 0.5λ0. This is because a) the physical size of the square cavity should be more than 1λ0 so as to support TE410 and TE140 modes, b) the length of the substrate integrated waveguide (SIW) connected to the crossover needs to be tuned and the element separation should be further increased in order to realize in-phase uniform excitation among the elements
Summary
T O meet the requirements from various scenarios, the wireless communications have increasing demand for high data rate and multi-functionality [1]–[3]. X. Yang is with the School of Communication and Information Engineering, Shanghai University, Shanghai 200444, China. In [14]–[17], coaxial probe fed patches and Vivaldi antennas are used to design the dual-polarized antenna arrays to achieve wideband operation The disadvantages of these arrays are high profile and low integration with the RF front-end. In [18], [19], the center and corner patch antenna arrays are designed with the microstrip feed lines on a single laminate, but they have high loss and severe spurious radiation caused by the feed lines To overcome these problems, the antenna arrays realized by using rectangular waveguides are widely used because they have low insertion loss, high power handling capacity and excellent self-consistent electrical shielding performance. The proposed antenna array is mainly aimed at geostationary satellite communications that can deliver fixed beams for areas with high density of users since dual-polarization and high gain are highly required in such a circumstance
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Free) 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
