A new class of wideband microstrip falcate patch antennas with reconfigurable capability at circular‐polarization

Abstract

A new wideband microstrip antenna, based on the falcate-shaped patch, with reconfigurable capability at circular-polarization is presented in this article. To achieve both properties of stable radiation characteristics and impedance matching across a broad bandwidth, the combination of the L-probe feeding and falcate-shaped patch is used. An RF-switch is utilized to excite the L-probes and generate either left-hand circular polarization or right-hand circular polarization over the wide operating bandwidth. A prototype of the proposed antenna is fabricated. An excellent agreement exists between the simulation and measurement results. The results reveal a wide impedance matching (|S 11 | < − 10 dB), bandwidth of 55% (1.42-2.5 GHz), and a 3 dB axial ratio bandwidth of 44% (1.6-2.5 GHz). Furthermore, results confirm good radiation and impedance matching performance of the fabricated antenna over the wide bandwidth in comparison with previous related investigations. The reported reconfigurable antenna can be used as a suitable choice for GPS, ISM band, or RFID applications

Chiroptical Metasurfaces: Principles, Classification, and Applications

“…Moreover, metasurfaces are much easier to fabricate due to their planar nature. To fully take advantage of metasurfaces, various applications have been studied, such as metaholograms [ 11 , 12 , 13 , 14 , 15 , 16 , 17 , 18 , 19 , 20 ], metalenses [ 21 , 22 , 23 , 24 ], absorbers [ 25 , 26 , 27 ], structural colors [ 28 , 29 , 30 , 31 , 32 , 33 , 34 , 35 , 36 ], beam splitters [ 37 , 38 , 39 ], optical diodes [ 40 , 41 ], LiDAR applications [ 42 , 43 ], wide bandwith antennas [ 44 , 45 , 46 , 47 , 48 , 49 , 50 ], on-chip antennas [ 51 , 52 , 53 ], and MIMO and SAR antennas [ 54 , 55 , 56 ]. In particular, due to their ability to enhance chiral signals by field localization, chiral material sensing based on metasurfaces has sparked significant attention in recent years.…”

Miniaturized microstrip patch antenna with high inter‐port isolation for full duplex communication system

“…1,8 Miniaturization and high isolation are two important factors in IBFD portable systems and wireless applications. [9][10][11][12][13][14][15][16][17][18][19][20] Therefore, microstrip patch antennas are one of the good options to achieve the miniaturization due to their low profile. [21][22][23][24][25][26] When an antenna is used commonly between Tx and Rx, usually a circulator is applied.…”

A Wideband Reflector-Backed Antenna for Applications in GPR

“…is back radiation can be used to illuminate the ground. us, some solutions are suggested for constructively enhancing the gain of planner antennas [11][12][13][14][15][16]. In the antenna casing of GPR, the use of a reflector, cavity, electromagnetic band-gap (EBG) structure, loop directors, and choke rings [17][18][19][20][21] is proposed for high gain GPR applications.…”