A T-Section Dual-Band Matching Network for Frequency-Dependent Complex Loads Incorporating Coupled Line With Dc-Block Property Suitable for Dual-Band Transistor Amplifiers

Maktoomi, Mohammad A.; Hashmi, Mohammad S.; Ghannouchi, and Fadhel M.

doi:10.2528/pierc14090403

Cited by 27 publications

(9 citation statements)

References 24 publications

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“…In this approach, the existing T-network for frequency-dependent complex load (FDCL) [22,32] has been modified by incorporating a TSTL as shown in Fig. 1d.…”

Section: Dual-frequency T-type Network Employing Tstlmentioning

confidence: 99%

“…Smith chart based method is approximate [26] and its analytical design requires complicated mathematical computations [27]. Dual-band matching utilising coupled lines is effective in some matching scenarios [28][29][30][31][32], but these require compensation in microstrip technology due to difference in their even-odd mode velocities. Furthermore, lumped component based dual bands are also effective in some situations [33], but their fabrication is difficult at higher frequencies and maintaining their value over wide frequency range is also difficult [34].…”

Section: Introductionmentioning

confidence: 99%

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Dual‐frequency impedance matching networks based on two‐section transmission line

Maktoomi

Yadav

Hashmi

et al. 2017

IET Microwaves, Antennas & Propagation

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In this study, a practical and useful dual‐frequency property of two‐section transmission line (TSTL) terminated into a real impedance is reported. Moreover, to demonstrate some of its potential applications for the performance enhancement in dual‐frequency impedance transformation problems, modified L‐ and T‐type dual‐frequency matching networks are presented. Specifically, the property is used to modify the conventional L‐type matching network to improve its transformation‐ratio and frequency‐ratio performance. Furthermore, improvement in conventional dual‐frequency T‐type matching network is also demonstrated through the incorporation of the TSTL. All the results are analytical and in closed form with simple design equations. For validation, prototypes of the proposed L‐ and T‐type matching networks operating concurrently at 1 GHz/1.45 GHz and 1 GHz/2 GHz, respectively, are designed and fabricated on FR‐4 substrate. The obtained simulated and measured results clearly exhibit the usefulness of the proposed design schemes.

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“…In this approach, the existing T-network for frequency-dependent complex load (FDCL) [22,32] has been modified by incorporating a TSTL as shown in Fig. 1d.…”

Section: Dual-frequency T-type Network Employing Tstlmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Dual‐frequency impedance matching networks based on two‐section transmission line

Maktoomi

Yadav

Hashmi

et al. 2017

IET Microwaves, Antennas & Propagation

Self Cite

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show abstract

“…Design equations for Sections A and B are detailed in [9], but for the sake of completeness they are discussed briefly in Subsections 3.1 and 3.2, respectively. Finally, design of Section C is discussed in Subsection 3.3.…”

Section: Implementation Of the Transformermentioning

confidence: 99%

A DUAL-FREQUENCY MATCHING NETWORK FOR FDCLS USING DUAL-BAND Λ/4-Lines

Maktoomi¹,

Hashmi

Panwar³

2015

PIER Letters

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Abstract-A new approach to design a dual-band matching network using a dual-band quarter-wave line is presented. The proposed matching network is capable of simultaneously matching frequencydependent complex loads (FDCLs) having different values at two arbitrary frequencies to a real source impedance, Z 0 . A very simple step-wise design procedure is discussed for the transformer along with closed-form design equations which are very simple in nature. For experimental verification, two PCB prototypes have been fabricated using FR-4 material, operating at 1 GHz and 2.42 GHz. The measurements results matches well with that obtained from simulation, exhibiting good performance.

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“…A lumped components based dual-band impedance transformers was also reported [22], but it had inherent weaknesses as the operating frequency increased [6]. Recently, coupled lines have been utilized in matching complex load impedances to real source impedance [19][20][21]23]. Lastly, very few tri-band/quad-band real to real impedance transformers have also been reported [24,25].…”

Section: Introductionmentioning

confidence: 99%

A Coupled-Line Based L-Section Dc-Isolated Dual-Band Real to Real Impedance Transformer and Its Application to a Dual-Band T-Junction Power Divider

Maktoomi¹,

Hashmi²

2014

PIER C

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This paper presents a dual-band impedance transformer for real source and load impedances that is capable of providing matching at two arbitrary frequencies. There are two possible configurations of the proposed technique, and both the configurations are simple and possess flexibility to cater to wide range of impedance environments. A very useful feature of the design is its inherent ability to provide DC isolation. A prototype, which works at 1 GHz and 2 GHz, fabricated using Roger's RO4350B laminate validates the proposed design with a good match between theoretical and experimental results. In addition, a dual-band T-junction power divider is reported to demonstrate the usefulness of the proposed impedance transformer.

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A T-Section Dual-Band Matching Network for Frequency-Dependent Complex Loads Incorporating Coupled Line With Dc-Block Property Suitable for Dual-Band Transistor Amplifiers

Cited by 27 publications

References 24 publications

Dual‐frequency impedance matching networks based on two‐section transmission line

Dual‐frequency impedance matching networks based on two‐section transmission line

A DUAL-FREQUENCY MATCHING NETWORK FOR FDCLS USING DUAL-BAND Λ/4-Lines

A Coupled-Line Based L-Section Dc-Isolated Dual-Band Real to Real Impedance Transformer and Its Application to a Dual-Band T-Junction Power Divider

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