Gain enhanced multipattern reconfigurable antenna for vehicular communications

Abstract

This article presents the design and implementation of a high-gain tunable dual-band pattern reconfigurable antenna for vehicular communications. The proposed antenna consists of a slotted patch loaded with a double-side FSS acting as superstrate. The proposed slotted antenna operates at 2.45 and 3.5 GHz and the frequency tuning over the dual-band is accomplished by employing a varactor diode for tuning the center frequency from 2.41 to 2.62 GHz and from 3.38 to 3.65 GHz at lower and upper frequency bands, respectively. To obtain pattern reconfiguration, the slotted patch is divided into four regions by using two diagonal lines of vias. By properly choosing the excitation port combinations, 14 different radiation patterns are realized with a maximum realized gain of 8.4 and 7.9 dB. Further enhancement of gain is achieved using frequency-selective surface (FSS) screens which act as a partially reflecting surface. The unique feature of this design is to provide reflection coefficient with high reflectivity in two predetermined frequency ranges. The prototype antenna is fabricated and the measurement results are reported. The experimental results show that the prototype antenna with FSS offers tunable dualband with beam reconfigurable properties. K E Y W O R D Sfrequency-selective surface, multipattern antenna, pattern reconfiguration

Inductively coupled triple layers of ultra‐miniaturized frequency selective surface for L‐band applications

“… The resonant frequency along with size miniaturization is proportional to the electrical length of the FSS unit cell. By adopting this inductive coupling methodology, the FSS unit cell size is 89%, 29%, 65%, 87%, 41%, 98%, 92%, 88%, 36%, 85%, and 400% smaller on comparing to literatures 1–10,16 The proposed FSS gives a stable response with a wide operating bandwidth of 400 MHz for various incident angles of EM waves up to 60°.…”

“…The complexity and the cost of production also increase with the increase in the number of metallization layers. The researchers in Reference 16 demonstrates the usage of novel miniaturized FSS as a superstrate over a multipattern reconfigurable antenna increases the strength of 14 different radiation patterns and made it suitable for low SNR environment.…”

Performance Improved Triangular Multi Band Antenna Using Reactive Impedance Substrate and Frequency Selective Surface

“…During the EM wave transmission, the unit cells will act as equivalent resonance circuit. The frequency of resonance is given as The gain enhanced Multipattern FSS based reconfigurable antenna was proposed and designed [14]. A compact dual band antenna with single layered FSS was proposed and the gain of the antenna was improved over 50% [15].…”

Design of a Novel 60 GHz Millimeter Wave Q-Slot Antenna for Body-Centric Communications

“…e antenna maintained stable gain ranging from 7.1 to 7.65 dBi over the whole operating band. Various designs of MIMO antennas and techniques, reconfigurable, tunable, and array antennas for different applications, are presented in [12][13][14][15][16][17][18][19][20]. A U-slot microstrip patch antenna for the 28 GHz band is presented in [21].…”