Uniplanar one-dimensional photonic-bandgap structures and resonators

Yun, Tae‐Yeoul; Chang, Kai

doi:10.1109/22.910561

Cited by 139 publications

(48 citation statements)

References 4 publications

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“…In practice, those have been already discussed well in the previous works by Radisic, Kim, Yun, Coulombe et al [3][4][5][6]. On the contrary, it is the aim of this work to propose a new method to calculate the characteristic impedance of those MTLs.…”

Section: Modified Transmission Line Structuresmentioning

confidence: 86%

“…Recently, microstrip transmission lines combined by perturbation or modified ground structures (MGS) such as defected ground structure (DGS), photonic bandgap (PBG), and substrate integrated artificial dielectric (SIAD) structures have been proposed and studied popularly [2][3][4][5][6]. In addition, those structures have been widely applied to high frequency circuits such as filters, dividers, couplers, mixers, amplifiers, multipliers, baluns, and antennas [7][8][9][10][11][12][13][14][15][16][17][18][19][20][21][22][23][24][25].…”

Section: Introductionmentioning

confidence: 99%

“…It is well known that modified transmission lines (MTL) -transmission lines with a perturbation such as periodicity or modified dielectric and ground structures -have some modification in the electrical length, slow wave factor (SWF), characteristic impedance (Z c ), and effective dielectric constant from the typical values [2][3][4][5][6].…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

A New Calculation Method for the Characteristic Impedance of Transmission Lines With Modified Ground Structures or Perturbation

Lim¹,

Lee²,

Lee³

et al. 2010

PIER

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Abstract-In this paper, a new calculating method for the characteristic impedance (Z c ) of transmission lines with perturbation and periodic modified ground structure (MGS), such as defected ground structure (DGS), photonic bandgap (PBG), and substrate integrated artificial dielectric (SIAD), is discussed. The proposed method is based on simple transmission line theories and proper related equations. The previous method to find Z c of transmission lines with MGS or perturbation produces the fluctuating Z c value depending on frequency, while the proposed method results in a constant value without frequency-dependence. As examples, several microstrip lines with DGS, PBG, and SIAD structure are simulated and measured, and their Z c values are calculated from S-parameters by the previous and proposed methods. It is shown that the Z c obtained by the proposed method is much more reliable than that calculated by the previous method for all examples.

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Section: Modified Transmission Line Structuresmentioning

confidence: 86%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

A New Calculation Method for the Characteristic Impedance of Transmission Lines With Modified Ground Structures or Perturbation

Lim¹,

Lee²,

Lee³

et al. 2010

PIER

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“…EBG structures are useful for constructing filters including bandstop filters and low-pass filters. EBG structures can be patterned on the microstrip transmission line on the ground plane [5] or the coplanar waveguide (CPW) EBG structures with rectangular aperture patterns etched on the ground plane and located adjacent to the gap between the signal and ground [6]. CPW Fig.…”

Section: Introductionmentioning

confidence: 99%

A Novel Reconfigurable Filter Using Periodic Structures

Karim

Liu

Alphones

et al. 2006

2006 IEEE MTT-S International Microwave Symposium Digest

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-In this paper, a reconfigurable filter is realized using electromagnetic bandgap structures (EBG) which can be switched from bandpass to bandstop filter at the same frequency by PIN diodes. A unit model for the reconfigurable filter is derived by equivalent circuit approach and full wave electromagnetic simulation is used for extracting the values of the lumped elements. The extracted parameters show that the bandpass and bandgap effect of the EBG cells. The dispersion diagram is obtained for the structure by combining the commercial software and the Floquet's theorem. The PIN diodes are used to switch from bandpass to bandstop filter. The measurement results show that the insertion loss in bandpass filter is around 2.1 dB and the 3-dB bandwidth is around 5.2 GHz which is suitable for wideband applications. For the bandstop filter, the 20 dB rejection bandwidth is 5.3 GHz and the insertion loss in the pass band is 1.6 dB.

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“…To cite some examples, the method has been successfully applied to the elimination of spurious bands in distributed bandpass filters [16], to enhance efficiency in broad-band power amplifiers by harmonic tuning [17], or to reduce phase noise in microwave oscillators [18]. In coplanar waveguide technology, uniplanar EBG structures have been recently proposed for the fabrication of filters and resonators based on the perturbation of line geometry [19], and EBG effects have been experimentally demonstrated where perturbation is implemented by etching patterns in the ground plane following a periodic structure [20]. Also, a miniaturized low pass filter has been recently proposed based on the slow wave effect and stop band characteristics of a CPW structure with capacitive and inductive coupling at periodic positions [21].…”

Section: Introductionmentioning

confidence: 99%

Analysis of the Reflection Properties in Electromagnetic Bandgap Coplanar Waveguides Loaded with Reactive Elements

Martín¹,

Falcone²,

Bonache³

et al. 2003

PIER

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Abstract-In this work, we study the reflection properties of coplanar waveguides (CPW) periodically loaded with shunt connected capacitances and periodically perturbed by varying the slot width. These structures are of interest because the low pass frequency response with spurious frequency bands, inherent to the presence of capacitors, can be improved. This is achieved through the attenuation of frequency parasitics that is obtained by the introduction of slot width modulation. Both sinusoidal and square wave patterns are considered and the effects of the relative position of reactive elements with regard to the perturbation geometry is analysed. According to coupled mode theory, the central frequencies of the rejected bands in periodic transmission media are given by the spectrum of the perturbation function. However, it is demonstrated that, due to the presence of capacitors, multiple spurious bands can be simultaneously suppressed even in the case of a singly tuned (sinusoidal) perturbation geometry. This result points out that the frequency selective behaviour associated to the presence of slot width modulation can not be interpreted in the framework of coupled mode theory, since the rejection of spurious bands in periodic loaded CPWs is not merely given by the spectrum of the perturbation geometry.

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Uniplanar one-dimensional photonic-bandgap structures and resonators

Cited by 139 publications

References 4 publications

A New Calculation Method for the Characteristic Impedance of Transmission Lines With Modified Ground Structures or Perturbation

A New Calculation Method for the Characteristic Impedance of Transmission Lines With Modified Ground Structures or Perturbation

A Novel Reconfigurable Filter Using Periodic Structures

Analysis of the Reflection Properties in Electromagnetic Bandgap Coplanar Waveguides Loaded with Reactive Elements

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