A Broadband Wide-Angle Scanning Linear Array Antenna With Suppressed Mutual Coupling for 5G Sub-6G Applications

A broadband wide-angle scanning array antenn a with suppressed mutual coupling for fifth-generation (5G) sub-6G mobile communication applications is presented in this letter. The metal columns are positioned below the edge of the dipole, leading to the improved the impedance matching characteristics, the suppressed mutual coupling and a wider scanning angle. A 1x8 prototype of the suggested design has been manufactured and tested to ensure its usefulness. The overall dimension is 2.33 lambda(0)x0.28 lambda(0)x0.24 lambda(0) (lambda(0) is the free-space wavelength at 2.5 GHz). The measured and simulated results are quite consistent. The main lobe achieves a scanning range of +/- 60 degrees at 2.5-4.5 GHz (57.1%) and yields a scanning range of +/- 75 degrees at 3-4 GHz (28.6%) with a gain loss of less than 2.5 dB. The sidelobe levels are mostly less than or equal to -7.9 dB and the isolation between the antenna elements can yield a maximal additional 14.7 dB enhancement.