A Wideband E-plane Pattern Reconfigurable Antenna with Enhanced Gain

Abstract

A novel method of steering antenna beam in its E‐plane is introduced and a design of wideband pattern reconfigurable antenna with enhanced gain is proposed in this paper. A bowtie antenna is used as the driven radiator, and two parasitic bowtie‐shaped microstrip stubs with two diodes are loaded beside each arm of the driven radiator. With the introducing of a low profile artificial magnetic conductor (AMC) beneath the bowtie radiator, unidirectional radiation pattern can be obtained. By altering the working states of the diodes, the main beam of the antenna can be switched in its E‐plane. The biasing circuit of the antenna is simple and easy to be implemented. The prototype of the antenna is fabricated, and good agreement can be observed between the simulated and measured results. Compared to other pattern reconfigurable antennas, the proposed antenna has advantages of a wide operating band, ability of beam switching in E‐plane, and high gain. These advantages makes it a good candidate for the wireless communication systems.

Beam Steering Using Active Artificial Magnetic Conductors: A 10-Degree Step Controlled Steering

“…This case is known when an incoming electromagnetic wave is incident to a HIS. We can work (12) to obtain an expression that englobe the reflection phase in one term, as seen in (14);…”

“…For the second category, there has been significant research in the area of low profile antennas. Three of the most relevant include [14], where the authors employ an AMC as ground plane for a bowtie antenna with re-configuration capabilities to generate a beam steering in the H-plane. In [15], the authors propose to steer the radiation pattern of a slot antenna using an AMC as reflecting surface.…”

“…Another draw back of this work is the high cost. Unlike the method presented in [14] and [15], this contribution generates beam steering by changing the properties of the AAMC, while our technique is cheaper to implement than [16].…”

Design optimization of a pattern reconfigurable microstrip antenna using differential evolution and 3D EM simulation‐based neural network model

“…The design complexity of reconfigurable pattern antennae are relatively high; however, there had been many studies that provides solutions for this challenging design problem such as usage of mechanical gears, modification of feeding systems phase, and modifications of surface currents via use of switches …”

“…[7][8][9][10][11][12][13][14][15][16][17][18][19][20] The design complexity of reconfigurable pattern antennae are relatively high; however, there had been many studies that provides solutions for this challenging design problem such as usage of mechanical gears, 21 modification of feeding systems phase, 22 and modifications of surface currents via use of switches. [23][24][25][26][27][28][29] One of the commonly used methods for design of reconfigurable pattern antenna is integration of PIN diodes on the surface of the antenna design. Microstrip antenna are optimal design due to their low cost, low profile, conformal ability, and easiness to be integrated with PIN diodes or RF-MEMS switches.…”