A improved branch resonator and it's application in microstrip equalizer designing

Zhao, Ying; Zhou, Donghua; Zhong-xia, Niu; Bin, Zhao

doi:10.1109/icmmt.2007.381316

Cited by 7 publications

(7 citation statements)

References 1 publication

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“…Microwave amplitude equalizers can be divided into two types: active and passive. Since a passive structure has better advantages in terms of system burden, response time, and power capacity, it has been widely studied [3][4][5][6][7][8][9]. Since integrated transmission line equalizer has the advantages of small size, light weight, and convenient integration with solid state circuit, it is widely used [10].…”

Section: Introductionmentioning

confidence: 99%

A Novel Microwave Equalizer Based on SIR Loading with Internal Coupled-lines

Yang,

Zhang,

Ren

et al. 2024

PIER Letters

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This paper proposes the design of a microwave equalizer based on stepped impedance resonator (SIR) loading with an internal coupled-line. By loading a ring-type stepped impedance resonator (SIR) with internal coupled-lines, a microwave equalizer with positive slope transmission characteristics is presented. The frequency response is synthesized using a second-order SIR, and a detailed theoretical derivation of the equalizer is presented. A prototype of the equalizer is fabricated and measured to validate its expected performance, with the measurements showing good agreement with the predictions. The microwave amplitude equalizer demonstrates the necessary gain slope across its entire operational frequency range. Finally, a potential design scheme for a microwave amplitude equalizer is proposed.

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Section: Introductionmentioning

confidence: 99%

A Novel Microwave Equalizer Based on SIR Loading with Internal Coupled-lines

Yang,

Zhang,

Ren

et al. 2024

PIER Letters

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“…Various types of broadband CPW-to-RWG transitions have been proposed in the literature [1][2][3][4][5][6][7][8][9][10][11][12][13]. Since 1990, ridge waveguide has been used to accomplish broadband CPW-to-RWG transitions [1][2][3][4][5].…”

Section: Introductionmentioning

confidence: 99%

“…However, the size of the ride waveguide is large, and the mechanical process used to fabricate the ridge waveguide is complicated, increasing the transition cost. To tackle the complex fabrication process of the ridge waveguide, CPW-to-RWG transitions using the planar type transitions are proposed [6][7][8][9][10][11][12][13]. First, a broadband CPW-to-RWG transition using the fin-line taper is presented [6].…”

Section: Introductionmentioning

confidence: 99%

Compact and Broadband CPW-to-RWG Transition Using Resonator with Impedance-matching Element

Tseng,

Zheng,

Cho

et al. 2024

PIER Letters

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This paper proposes a compact and broadband coplanar waveguide (CPW)-to-rectangular waveguide (RWG) transition using a resonator with an impedance-matching element. The transition size is as small as 7.66 mm, and the frequency range for which the reflection coefficient is smaller than −15 dB covers from 8.05 GHz to 12.18 GHz (FBW = 40.83%), almost encompassing the full Xband (8.2-12.4 GHz). To reduce the size of the transition, a short-circuited stub phase shifter is used to replace the half-wavelength phase shifter, resulting in a miniaturized CPW-to-RWG transition using the resonator with the impedance-matching element. The transition size is further reduced from 7.7 mm to 5.9 mm. Besides, the frequency range for which the reflection coefficient is smaller than −15 dB covers from 8.05 GHz to 12.38 GHz (FBW = 42.38%), nearly encompassing the full X-band (8.2-12.4 GHz) as usual. To verify the simulation results, both CPW-to-RWG transitions using the resonator with the impedance-matching element are fabricated and measured. The simulation and measurement results are in reasonable agreement.

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“…The parameter that estimates the microwave energy loss in waveguide is attenuation coefficient. According to [6], it has been calculated that the attenuation coefficient of rectangular waveguide at TE 01 mode is much lower that of cylinder waveguide at TE 11 mode. Based on this statement, better performance of the developed ECR ion source with a rectangular waveguide is expected and the relevant primary study is plasma diagnostics within this ion source to find the space distribution of the plasma parameters.…”

Section: Introductionmentioning

confidence: 99%

Bended probe diagnostics of the plasma characteristics within an ECR ion source with a rectangular waveguide

Yang¹,

Fu²,

Liu³

2018

Plasma Sci. Technol.

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To reveal the argon plasma characteristics within the entire region of an electron cyclotron resonance (ECR) ion source, the plasma parameters were diagnosed using a bended Langmuir probe with the filament axis perpendicular to the diagnosing plane. Experiments indicate that, with a gas volume flow rate and incident microwave power of 4 sccm and 8.8 W, respectively, the gas was ionized to form plasma with a luminous ring. When the incident microwave power was above 27 W, the luminous ring was converted to a bright column, the dark area near its axis was narrowed, and the microwave power absorbing efficiency was increased. This indicates that there was a mode transition phenomenon in this ECR ion source when the microwave power increased. The diagnosis shows that, at an incident microwave power of 17.4 W, the diagnosed electron temperature and ion density were below 8 eV and 3×10 17 m −3 , respectively, while at incident microwave power levels of 30 W and 40 W, the maximum electron temperature and ion density were above 11 eV and 6.8×10 17 m −3 , respectively. Confined by magnetic mirrors, the higher density plasma region had a bow shape, which coincided with the magnetic field lines but deviated from the ECR layer.

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A improved branch resonator and it's application in microstrip equalizer designing

Cited by 7 publications

References 1 publication

A Novel Microwave Equalizer Based on SIR Loading with Internal Coupled-lines

A Novel Microwave Equalizer Based on SIR Loading with Internal Coupled-lines

Compact and Broadband CPW-to-RWG Transition Using Resonator with Impedance-matching Element

Bended probe diagnostics of the plasma characteristics within an ECR ion source with a rectangular waveguide

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