Miniaturized Composite Right/Left-Handed Stepped-Impedance Resonator Bandpass Filter

Karimian, Shokrollah; Hu, Zhirun

doi:10.1109/lmwc.2012.2206018

Cited by 37 publications

(26 citation statements)

References 10 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…It can be simply shown that the values of famous purely capacitive or purely inductive admittance inverters could be found via equations (9) and (10); In other words, if we assume that L 2 ¼ 0, L 1 1 and C 2 ¼ 2C 1 ¼ C, C . 0 in Fig.…”

Section: V a N A L Y S I S O F A D M I T T A N C E I N V E R T E mentioning

confidence: 99%

“…On the other hand, one of the activities in the field of microwave bandpass filters is to apply composite right/left handed (CRLH) cells, which support right/left-handed waves for the purpose of miniaturization and rejection's improvement [6][7][8][9]. In one group, one or more CRLH cells are series and provide the required passband [6,7] and the other group uses CRLH cells to implement bandpass filters in the form of coupled resonator filters [8][9][10]. In one group, one or more CRLH cells are series and provide the required passband [6,7] and the other group uses CRLH cells to implement bandpass filters in the form of coupled resonator filters [8][9][10].…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Switchable bandpass filter using CRLH cells based on a new kind of admittance inverter

Keshavarzi

Atlasbaf

2016

Int. J. Microw. Wireless Technol.

View full text Add to dashboard Cite

Switchable bandpass filter using CRLH cells based on a new kind of admittance inverter samaneh keshavarzi and zahra atlasbafIn this paper, a new kind of admittance inverter and design of a switchable microstrip bandpass filter using composite right/ left-handed (CRLH) cells has been presented. The proposed filter has two states (or passbands). One of the two passbands, is accessible at each time by on/off state of three PIN diodes. This filter is a three-pole, coupled resonator filter, composed of short-circuited shunt resonators. These resonators are coupled using admittance inverters. With regard to the characteristics of the equivalent circuit of CRLH cells, a new structure of admittance inverter (J-inverter) has been introduced. This novel J-inverter has PI-section equivalent circuit and it consists of both inductive and capacitive elements. In our work, the proposed J-inverter was mathematically studied and the switchable filter was simulated and implemented. The results of simulations for the first and second state of the filter, which are frequency bands of (D1 ¼ 0.11 and f1 ¼ 1.26 GHz) and (D2 ¼ 0.12 and f2 ¼ 1.5 GHz), are verified by measurements.

show abstract

Section: V a N A L Y S I S O F A D M I T T A N C E I N V E R T E mentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Switchable bandpass filter using CRLH cells based on a new kind of admittance inverter

Keshavarzi

Atlasbaf

2016

Int. J. Microw. Wireless Technol.

View full text Add to dashboard Cite

show abstract

“…It has been shown in that two coupled CRLH transmission lines can have very high backward coupling that can reach 0 dB [13]. Thanks to these properties, compact microwave resonators [14] filters [15] - [17] and couplers [18] are designed.…”

Section: Introductionmentioning

confidence: 99%

Coupled CRLH transmission lines for compact and high selective bandpass filters

Ibrahim

Abdalla

Budimir

2017

Microw. Opt. Technol. Lett.

View full text Add to dashboard Cite

In case of abuse or copyright appearing without permission e-mail repository@westminster.ac.uk > REPLACE THIS LINE WITH YOUR PAPER IDENTIFICATION NUMBER (DOUBLE-CLICK HERE TO EDIT) < 1  Abstract-A compact size and high selective bandpass filter is presented in this paper. The filter is designed to serve at 3.5 GHz with two transmission zeros at 3.35 GHz and 3.85 GHz. The filter is designed as two gap capacitor coupled to coupled composite right left handed transmission lines. The coupled lines were designed to demonstrate a zeroth order phase at 3.5 GHz. Also, the transmission zeros were achieved as a consequence of the electrical / magnetic couplings between the two coupled transmission lines. The employed cell, filter design equations are emphasized. The filter S-parameters were extracted based on the circuit model, full wave simulation and experimental measurements. A good agreement between modeled, simulated and measured results is achieved. The measured centre frequency of the bandpass filter is 3.55 GHz and 100 MHz bandwidth which is suitable for WiMAX applications. Also, the filter has low measured insertion loss which does not exceed 1 dB within passband. Finally, the filter has advantageous of compactness (size is only 20 × 18 mm 2 ) which is only 50% compared to conventional non-selective one stage coupled line filter.

show abstract

“…Left-handed metamaterials have been approved to be able to reduce the dimensions of passive circuits. In [12], a miniaturized SIR BPF based on CRLH-TLs is presented, which has a single passband with a complicated structure.…”

Section: Introductionmentioning

confidence: 99%

A Novel Compact Tri-Band Bandpass Filter Based on Dual-Mode CRLH-Tl Resonator and Transversal Stepped-Impedance Resonator

Cao

Yi²,

Chen³

et al. 2015

PIER Letters

View full text Add to dashboard Cite

Abstract-A novel compact tri-band band-pass filter (BPF) with transversal signal interaction concepts, based on composite right/left-handed transmission lines (CRLH-TLs) resonator and parallel stepped impedance resonator (SIR), is presented. The main path is based on a dual-mode CRLH-TL resonator, which exhibits the first two passbands. The secondary path is a SIR, which contributes to the third passband and generates another transmission zero between the first and second passbands simultaneously. The proposed filter has been simulated, fabricated and measured. Both the simulated and measured results show that the filter has a high selectivity with a compact size as small as 0.18λg × 0.12λg.

show abstract

Miniaturized Composite Right/Left-Handed Stepped-Impedance Resonator Bandpass Filter

Cited by 37 publications

References 10 publications

Switchable bandpass filter using CRLH cells based on a new kind of admittance inverter

Switchable bandpass filter using CRLH cells based on a new kind of admittance inverter

Coupled CRLH transmission lines for compact and high selective bandpass filters

A Novel Compact Tri-Band Bandpass Filter Based on Dual-Mode CRLH-Tl Resonator and Transversal Stepped-Impedance Resonator

Contact Info

Product

Resources

About