FSS characteristics of a coplanar waveguide left handed transmission line on ferrite substrate

2007 ◽  
Author(s):  
M.A. Abdalla ◽  
Zhirun Hu Zhirun Hu
Keyword(s):  
Transmission Line ◽  
Coplanar Waveguide ◽  
Left Handed ◽  
Ferrite Substrate

scholarly journals Compact Wideband Dual-Frequency Antenna Based on a Simplified Composite Right/Left-Handed Transmission Line with Hilbert Curve Loading

2019 ◽  
Vol 2019 ◽  
pp. 1-8
Author(s):  
Tianpeng Li ◽  
Jian Zhang ◽  
Baowei Cheng ◽  
Xue Lei ◽  
Zhijian Xu ◽  
...  
Keyword(s):  
Transmission Line ◽  
Coplanar Waveguide ◽  
Antenna Design ◽  
Dual Frequency ◽  
Hilbert Curve ◽  
Order Resonance ◽  
Line Structure ◽  
Left Handed ◽  
Antenna Length ◽  
Bandwidth Broadening

This paper addresses the issues of low bandwidth, gain, and efficiency of miniaturized microwave antennas by proposing a novel wideband dual-frequency coplanar waveguide antenna design based on a simplified composite right/left-handed (SCRLH) transmission line structure with Hilbert curve loading. The multifrequency characteristics of the SCRLH transmission line structure are evaluated theoretically, and the antenna parameters promoting bandwidth broadening under zeroth-order resonance (ZOR) and first-order resonance (FOR) mode operation are evaluated. The bandwidth broadening in the ZOR and FOR modes is accordingly revealed to be independent of the antenna length, and the structure therefore facilitates wideband operation under miniaturization. Finally, the dual-frequency ZOR and FOR mode antenna design with center frequencies of f0 = 1.865 GHz and f1 = 2.835 GHz is validated via simulation, and the performance of a compact prototype antenna is evaluated experimentally. The −10 dB return loss bandwidths at f0 and f1 are 187 MHz (from 1.773 GHz to 1.96 GHz) and 368 MHz (from 3.002 GHz to 3.37 GHz), and the corresponding relative bandwidths are 10.1% and 11.5%, respectively. The experimentally measured peak gains and radiation efficiencies at f0 are 1.54 dB and 81.3%, respectively, and those at f1 are 1.71 dB and 74.2%, respectively.

The research of equivalent circuit of left-handed coplanar-waveguide transmission line element

2010 ◽  
Vol 107 (9) ◽  
pp. 09A941
Author(s):  
Jia-Hui Fu ◽  
Qun Wu ◽  
Kuang Zhang ◽  
Guo-Hui Yang ◽  
Fan-Yi Meng
Keyword(s):  
Transmission Line ◽  
Equivalent Circuit ◽  
Line Element ◽  
Coplanar Waveguide ◽  
Left Handed ◽  
Waveguide Transmission

scholarly journals NOVEL COMPACT DUAL-BROADBAND PLANAR METAMATERIAL ANTENNA

2017 ◽  
Vol 55 (3) ◽  
pp. 334
Author(s):  
Dang Nhu Dinh ◽  
Huynh Nguyen Bao Phuong ◽  
Dinh Thanh Liem ◽  
Hoang Phuong Chi ◽  
Dao Ngoc Chien
Keyword(s):  
Transmission Line ◽  
Resonance Frequency ◽  
Coplanar Waveguide ◽  
Dual Band ◽  
Frequency Bands ◽  
Left Handed ◽  
Dual Band Antenna ◽  
Metamaterial Antenna ◽  
Measurement Results

This paper proposes a novel uni-planar dual-band antenna using Composite Right Left Handed (CRLH) transmission line (CRLH-TL). Proposed antenna is designed based on the fringing effects of metamaterials and combined with coplanar waveguide (CPW) feeding in order to create two frequency bands for WLAN applications at the 2.4 and 5.5 GHz bands. Principle of gradual transform is applied to the antenna for extending the resonance frequency ranges. Optimized metamaterial antenna are fabricated and measured. Measurement results showed that the antenna operates in two broad frequency ranges spreading from 1.8 to 3.62 GHz and from 4.85 to 7.52 GHz with very compact overall dimensions of 18 mm × 16 mm (0,147 λ0 × 0.13λ0).

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