A Novel Dual Band Transmitter Using Microstrip Defected Ground Structure

Chen, Xiaoqun; Shi, Xiaowei; Guo, Yuchun; Xiao, Min-Xiao

doi:10.2528/pier08041503

Cited by 32 publications

(17 citation statements)

References 19 publications

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“…1) [10][11][12][13][14][15][16]. DGSs increase the effective values of dielectric constant of substrates (ε eff ), decrease the wavelength and eventually decrease the overall length of the Wilkinson divider.…”

Section: Design Proceduresmentioning

confidence: 99%

Miniaturization of Wilkinson Power Dividers by Using Defected Ground Structures

Oraizi¹,

Esfahlan²

2008

PIER Letters

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Abstract-It is proposed that the application of defected ground structures (DGS) and electromagnetic bandgap (EBG) reduce the phase velocity, increase effective permittivity of microstrips and reduce the effective the wavelength which eventually lead to the reduction of overall length of Wilkinson power dividers. Furthermore, the adjacent strip lines may approach each other, which cause coupling problems. The undesired coupling maybe cancelled by connecting a capacitance in parallel with the isolation resistor of Wilkinson power divider. Application of DGS and EBG will not only reduce the dimensions of the divider, but also improves its scattering parameters.

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Section: Design Proceduresmentioning

confidence: 99%

Miniaturization of Wilkinson Power Dividers by Using Defected Ground Structures

Oraizi¹,

Esfahlan²

2008

PIER Letters

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“…Hence, they are applicable in passive circuits such as dual-band filters, dual-band power dividers and so forth [6][7][8][9]. In terms of active circuits, complex impedance transformers are required such as a dual-band amplifier [10][11][12]. Wu et al [13] extended a two-section transformer to deal with equal complex loads at two frequencies using unequal transmission lines.…”

Section: Introductionmentioning

confidence: 99%

A Dual-Band Impedance Transforming Technique With Lumped Elements for Frequency-Dependent Complex Loads

Moon¹,

Myung²

2013

PIER

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Abstract-In this paper, a new technique to realize lumped dual-band impedance transformers for arbitrary frequency-dependent complex loads is proposed. For the complex impedance transforming, closedform design equations are presented for a series-shunt and a shuntseries type and a concept of combination is also presented. They use the proposed equation of input impedance. This equation can easily and exactly obtain the input impedance of any two-port network using the ABCD matrix. Then in order to realize dualband operation, four topologies comprising two types and a design method are presented. This technique is numerically demonstrated by various examples with excellent results and it has advantages of simplicity, intuitiveness and versatility because it is a general solution for complex impedance transforming. The proposed dualband impedance transforming technique can be utilized for practical matching problems such as microwave amplifiers and other devices.

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“…One of which is to employ shunt open-circuited resonators that are quarterwavelength long, which fits more to filter out narrowband signals [1]. However, other techniques, like the use of periodic structures, defected ground plane structure are more desirable for wideband communication systems [2]- [5]. Recently, subwavelength resonators, well-known in literature as metamaterials, have received much attention, especially for the synthesis of filters design and harmonics suppression [6]- [8].…”

Section: Introductionmentioning

confidence: 99%

Miniaturized Bandstop Filters Using Slotted-Complementary Resonators

Bait-Suwailam

2014

IJDIWC

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This paper presents a technique to miniaturize bandstop filters applicable for radiofrequency/microwave applications. The technique comprises the use of small resonant inclusions bridged with a slot, etched from the metallic ground plane underneath the filter's microstrip line segment. Unlike artificial magnetic materials, for instance split-ring resonators (SRRs) that respond to vertical magnetic field, complementary SRRs (CSRRs) resonate upon an excitation of an axial time-varying electric field. Numerical full-wave studies are presented here to validate and proof the proposed concepts. It is found that high miniaturization factors can be achieved for the filters loaded with the proposed slotted complementary resonators in comparison to nonslotted resonators. Furthermore, sensitivity analysis is conducted to study the effect of geometrical parameters of the proposed slotted resonators as well as the effect of the choice of host media on the suppression bandwidth and rejection level of such filters. Miniaturized bandstop filters based on developed slotted-complementary spiral resonators are also proposed and numerically evaluated.

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A Novel Dual Band Transmitter Using Microstrip Defected Ground Structure

Cited by 32 publications

References 19 publications

Miniaturization of Wilkinson Power Dividers by Using Defected Ground Structures

Miniaturization of Wilkinson Power Dividers by Using Defected Ground Structures

A Dual-Band Impedance Transforming Technique With Lumped Elements for Frequency-Dependent Complex Loads

Miniaturized Bandstop Filters Using Slotted-Complementary Resonators

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