On the Dual-Frequency Impedance/Admittance Characteristic of Multisection Commensurate Transmission Line

Maktoomi, Mohammad A.; Akbarpour, Mohammadhassan; Hashmi, Mohammad S.; Ghannouchi, Fadhel M.

doi:10.1109/tcsii.2016.2604425

Cited by 9 publications

(15 citation statements)

References 13 publications

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“…The first part of the matching unit is a simple microstrip line (TL1) with the characteristics impedance

Z_{normalchar}

and the electrical length

θ_{normalchar false(normali false)}

(

i = 1

for

f_{1} = 1.5 GHz

i = 2

for

f_{2} = 2.6 GHz

). The line TL1 basically transforms the frequency dependent uncorrelated load impedances (

Z_{normalL}^{^{'}} = R_{1} + j X_{1}

f_{1}

and

Z_{normalL}^{^{'}} = R_{2} + j X_{2}

f_{2}

) to the impedances

Z_{in 1}

(

f_{1}

) and

Z_{in 1}

(

f_{2}

), which are complex conjugate to each other [32–34]. The simple microstrip line (TL1) is taken here while considering the ratio ( r ) of two extreme frequencies as

r = f_{2} / f_{1}

(where

f_{2} > f_{1}

).…”

Section: Differential Rectifying Circuit Designmentioning

confidence: 99%

Broadband integrated rectenna using differential rectifier and hybrid coupler

Chandravanshi

Katare²,

Akhtar³

2020

IET Microwaves, Antennas & Propagation

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“…The first part of the matching unit is a simple microstrip line (TL1) with the characteristics impedance

Z_{normalchar}

and the electrical length

θ_{normalchar false(normali false)}

(

i = 1

for

f_{1} = 1.5 GHz

i = 2

for

f_{2} = 2.6 GHz

). The line TL1 basically transforms the frequency dependent uncorrelated load impedances (

Z_{normalL}^{^{'}} = R_{1} + j X_{1}

f_{1}

and

Z_{normalL}^{^{'}} = R_{2} + j X_{2}

f_{2}

) to the impedances

Z_{in 1}

(

f_{1}

) and

Z_{in 1}

(

f_{2}

), which are complex conjugate to each other [32–34]. The simple microstrip line (TL1) is taken here while considering the ratio ( r ) of two extreme frequencies as

r = f_{2} / f_{1}

(where

f_{2} > f_{1}

).…”

Section: Differential Rectifying Circuit Designmentioning

confidence: 99%

Broadband integrated rectenna using differential rectifier and hybrid coupler

Chandravanshi

Katare²,

Akhtar³

2020

IET Microwaves, Antennas & Propagation

View full text Add to dashboard Cite

“…The best configuration of PLS is possible when the gaps of both frequencies are zero, but it can not be implemented. There are several techniques to perform dual-impedance matching [6–8], but it is difficult to derive design parameters satisfying a narrow frequency gap. To design an implementable impedance transformer, we propose a method using T-shaped T-lines with double-section shunt stubs, as shown in Fig 3.…”

Section: Dual-state Impedance Transformermentioning

confidence: 99%

“…Alternatively, if we use a double-section stub, the characteristic impedances Z n ( n = 3, 4) can be selected within the feasible impedance range. Using an open stub, Y in ,3 for cold and hot states are respectively given as follows [8]: …”

Section: Dual-state Impedance Transformermentioning

confidence: 99%

“…There are works of impedance matching for a plasma bulb [2, 4, 9], but they use a single matching for an impedance of one plasma state. The dual impedance matching methods [6–8] are not designed for a narrow frequency band gap because they do not consider very different impedances within a narrow frequency band gap. The proposed method is a new attempt to match two very different impedances in the near frequency band as far as the authors know.…”

Section: Dual-state Impedance Transformermentioning

confidence: 99%

See 1 more Smart Citation

Modeling and impedance matching for radio frequency driven plasma lamp considering cold and hot states

Kang

2018

PLoS ONE

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A new dual-state impedance matching scheme for a microwave driven plasma lamp using a solid-state power amplifier (SSPA) is presented. The impedance of the plasma lamp depends on the amount of input radio frequency (RF) energy, and therefore has very different values for hot and cold states. First, a method for effectively modeling the electrical characteristics of a plasma lamp that depends on RF power has been proposed. Second, a new technique has been proposed to achieve dual-state impedance matching for two state impedances at two very close frequencies using a T-shaped matching network with two section shunt stub and additional transmission line. The proposed method can achieve dual state impedance matching in two frequency bands located very closely when compared to the conventional methods. The accuracy of the proposed model and the effectiveness of the proposed dual-state matching are verified via a plasma lamp system with a 2.45 GHz 300 W GaN SSPA.

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“…In this paper, a new and rigorous analytical design methodology for the classic tri-section cascaded coupled-line-based topology is presented to maximize the bandwidth performance for all the S-parameters simultaneously. Furthermore, as depicted in Figure 1 b, the proposed design methodology utilizes a dual-band design concept [ 37 ] to arrive at a wideband design. This dual-band design approach guarantees that the resonance frequencies are always located at f 1 and f 2 , and therefore, the achieved bandwidth is BW = f H − f L = ( f 2 − f 1 ) + 2 f ex , where 2 f ex is the extra bandwidth that provides a margin for process/component variations.…”

Section: Introductionmentioning

confidence: 99%

A Novel Analytical Design Technique for a Wideband Wilkinson Power Divider Using Dual-Band Topology

Omi

Islam

Maktoomi

et al. 2021

Sensors

Self Cite

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In this paper, a novel analytical design technique is presented to implement a coupled-line wideband Wilkinson power divider (WPD). The configuration of the WPD is comprised of three distinct coupled-line and three isolation resistors. A comprehensive theoretical analysis is conducted to arrive at a set of completely new and rigorous design equations utilizing the dual-band behavior of commensurate transmission lines. Further, the corresponding S-parameters equations are also derived, which determine the wideband capability of the proposed WPD. To validate the proposed design concept, a prototype working at the resonance frequencies of 0.9 GHz and 1.8 GHz is designed and fabricated using 60 mils thick Rogers’ RO4003C substrate. The measured result of the fabricated prototype exhibits an excellent input return loss > 16.4 dB, output return loss > 15 dB, insertion loss < 3.30 dB and a remarkable isolation > 22 dB within the band and with a 15 dB and 10 dB references provide a fractional bandwidth of 110% and 141%, respectively.

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On the Dual-Frequency Impedance/Admittance Characteristic of Multisection Commensurate Transmission Line

Cited by 9 publications

References 13 publications

Broadband integrated rectenna using differential rectifier and hybrid coupler

Broadband integrated rectenna using differential rectifier and hybrid coupler

Modeling and impedance matching for radio frequency driven plasma lamp considering cold and hot states

A Novel Analytical Design Technique for a Wideband Wilkinson Power Divider Using Dual-Band Topology

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