Compact QMSIW bandpass filter using composite right/left‐handed transmission line in grounded coplanar waveguide

2018 ◽  
Vol 28 (9) ◽  
Author(s):  
Sambaiah Pelluri ◽  
M. V. Kartikeyan
Keyword(s):  
Transmission Line ◽  
Bandpass Filter ◽  
Coplanar Waveguide ◽  
Left Handed

scholarly journals Ultra Wide Band (UWB) 3.4 - 4.8 Ghz Bandpass Filter Menggunakan Saluran Transmisi CRLH Satu Sel

2016 ◽  
Vol 2 (1) ◽  
pp. 18-26
Author(s):  
Andika Atmaja
Keyword(s):  
Transmission Line ◽  
Transmission Lines ◽  
Bandpass Filter ◽  
Wide Band ◽  
Ultra Wide Band ◽  
Double Negative ◽  
Transmission Line Model ◽  
Artificial Material ◽  
Left Handed ◽  
Highpass Filter

Penelitian studi tentang Metamaterials (MTMs) dalam beberapa tahun terakhir telah meningkat sangat pesat. Metamaterials yang di sebut juga artificial material atau  Left Handed (LH) material adalah material yang tidak ada dialam dimana strukturnya direkayasa oleh manusia yang memiliki dua atau lebih properties yang khusus, misalkan pada Double Negative (DNG) material yang memiliki μ negative dan  ε negative. Beberapa pendekatan dalam mendesign metamaterial yaitu pendekatan resonant dan pendekatan Transmission line. Model transmision line yang pertama adalah Right Handed Transmission lines (RH TL) yang dimodelkan dalam sebuah unit sel sebagai rangkaian dan shunt kapasitor shunt(CR), yang kedua adalah Left Handed Transmission Line (LH TL) dimodelkan dalam sebuah unit sel sebagai rangkaian kapasitor seri(CL) dan induktansi shunt(LL). gabungan dari dua buah model transmission line ini disebut Composite Right-left Handed Transmission Line(CRLH TL)  dan ini menjadi dasar dalam mendesign metamaterial. CRLH transmission line dimodelkan dalam sebuah unit sel sebagai rangkaian kapasitor seri(CL), induktansi seri(LR) dan induktansi shunt (LL) serta induktansi shunt(LL). CRLH TL memiliki negatif, nol dankonstanta propagasi positif sesuai dengan karakteristik dari permitivitas efektif dan permeabilitas[1]. Hasil pengukuran bandpass filter menggunakan saluran transmisi CRLH satu sel menunjukkan frekuensi cutoff pada -10dB terletak pada frekuensi 3.016 GHz pada highpass filter dan 5.359GHz pada lowpass filternya. Sedangkan frekuensi 3.4 GHz terletak pada -4.8415 dB sedangkan frekuensi 4.8 Ghz terletak pada -4.753 dB. Hasil dari perancangan menunjukkan bahwa saluran transmisi CRLH satu sel dapat memenuhi spesifikasi yang diminta.

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.

A CRLH TL Transmission Line Structure and its Application to Bandpass Filter Design

2013 ◽  
Vol 446-447 ◽  
pp. 865-868
Author(s):  
Ya Lin Guan ◽  
Xin Kun Tang ◽  
Shi Lei Zhou
Keyword(s):  
Transmission Line ◽  
Insertion Loss ◽  
Bandpass Filter ◽  
Filter Design ◽  
Left Handed ◽  
Relative Bandwidth ◽  
Low Pass ◽  
Band Pass ◽  
Low Insertion Loss ◽  
High Pass

In this paper, a novel bandpass filter (BPF) using the composite right/left-handed transmission line (CRLH-TL) theory is presented.The composite right/left-handed TL with the high-pass characters of left-handed transmission line (LH-TL) and the low-pass characters of right-handed transmission line (RH-TL) are used to construct the bandpass filter.Using this theory,we design a bandpass filter which have an obvious band pass response with a wide passband range from 5.1to 12.9GHz and a low insertion loss of less than 3.1dB. The relative bandwidth is close to 110%. Simulation using ADS demonstrated the viability of the approach.

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