Low-profile reflective polarization conversion metasurface with frequency selective characteristics

2019 ◽  
Vol 6 (8) ◽  
pp. 085807
Author(s):  
Zhaosong Liu ◽  
Ying Liu ◽  
Wenbo Zhang ◽  
Yongtao Jia
Keyword(s):  
Polarization Conversion ◽  
Low Profile ◽  
Frequency Selective

Low-profile and Dual-polarization Water-based Frequency Selective Rasorber with Ultra-wideband Absorption

2021 ◽  
pp. 1-1
Author(s):  
Xiangkun Kong ◽  
Lingqi Kong ◽  
Shunliu Jiang ◽  
Xuemeng Wang ◽  
Yukun Zou ◽  
...  
Keyword(s):  
Ultra Wideband ◽  
Dual Polarization ◽  
Low Profile ◽  
Water Based ◽  
Frequency Selective

Miniaturized frequency selective surface with high angular stability

Frequenz ◽  
2021 ◽  
Vol 0 (0) ◽  
Author(s):  
Zain Ul Abidin ◽  
Qunsheng Cao ◽  
Gulab Shah ◽  
Zaheer Ahmed Dayo ◽  
Muhammad Ejaz
Keyword(s):  
Resonant Frequency ◽  
Electric Field Distribution ◽  
Equivalent Circuit Model ◽  
Surface Current ◽  
Frequency Selective Surface ◽  
Angular Stability ◽  
Working Mechanism ◽  
Low Profile ◽  
Simple Geometry ◽  
Frequency Selective

Abstract In this paper, a miniaturized bandstop frequency selective surface (FSS) with high angular stability is presented. Each FSS element consists of four sets each consisting eight octagonal concentric interconnected loops. The four sets are connected with each other through outermost octagonal loop. The unit size is miniaturized to 0.066 λ0 at the resonant frequency of 1.79 GHz. The proposed configuration achieves excellent angular stability (only 0.025 GHz resonant frequency deviation is observed upto 83° oblique angles). The working mechanism of FSS is explained with the help of equivalent circuit model (ECM), electric field distribution, and corresponding surface current distribution. A prototype of the designed bandstop FSS is fabricated to verify the simulated frequency response. The experimental results are consistent with the simulation results. Simple geometry, low profile, high angular stability, and compact cell size are prominent features of the proposed structure.

A Low-Profile Third-Order Bandpass Frequency Selective Surface

2009 ◽  
Vol 57 (2) ◽  
pp. 460-466 ◽  
Author(s):  
Nader Behdad ◽  
Mudar Al-Joumayly ◽  
Mohsen Salehi
Keyword(s):  
Frequency Selective Surface ◽  
Third Order ◽  
Low Profile ◽  
Frequency Selective

scholarly journals A Novel 2.4-GHz Low-Profile Smart MIMO Antenna with Reconfigurable Frequency-Selective Reflectors

2020 ◽  
Vol 9 (2) ◽  
pp. 42-51
Author(s):  
C.-H. Tsai ◽  
J.-S. Sun ◽  
S.-J. Chung ◽  
J.-H. Tarng
Keyword(s):  
Multiple Input Multiple Output ◽  
Antenna System ◽  
Switching Network ◽  
Ieee 802.11A ◽  
Mimo Antenna ◽  
Low Profile ◽  
Specific Direction ◽  
Input Multiple Output ◽  
Frequency Selective ◽  
Beam Switching

In this paper, a new low-profile smart multiple-input multiple-output (MIMO) antenna system is presented for WiFi IEEE 802.11a/b/g/n/ac/ax applications. The proposed compact 2.4-GHz antenna system employs two beam-switching antenna cells for MIMO operation. Each antenna cell is composed of four reconfigurable frequency-selective reflectors (RFSRs) and a one-to-four switching feeding network. The RFSRs are constructed using a one-wavelength metal loop resonator, which functions as a radiating antenna or a wave reflector to reflect beams along a specific direction, as controlled by the switching network. The feeding switching network utilizes PIN diodes to adjust the phase and impedance required for changing the operational status of each RFSR. The overall dimensions of the antenna system, including the metallic ground, are 120 mm ´ 120 mm ´ 9.5 mm. Moreover, the measured operational bandwidth of the 2.4-GHz antenna is approximately 100 MHz, and the radiation efficiency of each directed beam is 40%–70%.

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