A Low-Cost High-Gain Dual-Beam Antenna With Large Beam Tilt Angle for Through-Wall FTTR Applications

In this letter, a high-gain dual-beam antenna with large beam tilt angle is proposed as a cost-effective solution for through-wall fiber-to-the-room (FTTR) applications. The dual-beam radiation is realized by the anti-phase currents distribution on the antenna, and two pairs of parasitic elements are loaded to significantly elevate the beam tilt angle and improve the bandwidth. The measured bandwidth of the proposed antenna is 1100 MHz (4.88-5.98 GHz), well covering the FTTR operation bands. Besides, the maximum tilt angle for the symmetrical dual beams reaches <inline-formula xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink"><tex-math notation="LaTeX">$53^{\circ }$</tex-math></inline-formula>, and the peak gain is 10.05 dBi at 5.3 GHz. Moreover, received signal strength indicator (RSSI) and throughput experiments are conducted to verify the efficacy of the proposed antenna in terms of through-wall functionality. The experimental results demonstrate that the proposed antenna exhibits superior through-wall and multi-room coverage capability in comparison to the conventional monopole antenna.