Smart antenna with automatic beam switching for mobile communication

Abstract

A new kind of smart antenna capable of automatically switching its main beam to track a moving target is presented. The antenna, which is suitable for mobile communication in long straight spaces, such as railways or highways, integrates a sensing element, signal processing element, and radiating element. The sensing element works based on a frequency-modulated continuous wave and delivers a beat frequency signal containing environmental information to the signal processing element, which is used to control the excitation of the radiating element. To verify the efficiency of the proposed antenna, a prototype is fabricated and implemented in a real corridor scenario. Furthermore, the error vector magnitude (EVM) along the test path is investigated to evaluate the system performance when using the proposed antenna. The results show that this kind of smart antenna is capable of improving mobile communication quality and decreasing energy consumption. Therefore, it is a promising candidate for mobile communication.

Concentric Annular Leaky Wave Antenna Array and Its Application to Self-Sensing Smart Antenna for Radio Wave Coverage in 2-D Confined Spaces

“…So, by feeding the two input ports of LWAs individually, the array provides two types of beams covering different regions. For acquiring the position of the user, all the detection information is extracted from the images of camera, and the two zone scores is given individually by [16] , , , b…”

“…Although these antennas are capable of changing their beams, to further improve the communication quality, smart antennas with automatic beam-changing are preferable. In [16], a smart antenna with automatic beam switching based on Frequency Modulated Continuous Wave (FMCW) is proposed, which is designed for one-dimensional radio wave coverage. In [17], an image-aware smart antenna providing beam tracking is designed for two-dimensional scenarios.…”

“…In this paper, a beam-changeable concentric annular LWA array is proposed. Comparing to the multi-beam antennas in [1][2][3][4][5][6][7][8]16,17] which mostly provides only directive switchable beams, this work generates multi-beams including directive beam, omnidirectional beam and synthetic beam. This adapts to more coverage demands.…”

Adaptive Beamforming Algorithm Based on MVDR for Smart Linear Dipole Array with Known Mutual Coupling

“…Recently wireless communication engineers are faced with the challenge of designing highly efficient systems that rely on adaptive intelligent antennas to improve coverage and capacity [1,2]. Smart antenna plays a major role to improve the performance of wireless communication systems [3]. This antenna uses an advanced signal processor which improves the performance of a wireless communication system with a good choice of formation adaptive beamforming algorithm [1].…”

An Optimized Design of Antenna Arrays for the Smart Antenna Systems

“…The concept of smart antennas has existed for many years, and it has received a wide attention [1]. Cellular networks require coverage, and coverage depends on the type of antenna and the antenna radiation pattern [2].…”