Enhanced Center Frequency of Terahertz Pulse Emission from Photoconductive Antenna

Diao, Junming; Du, Liang; Ouyang, Jun; Yang, Peng; Nie, Zaiping

doi:10.1163/156939311798147006

Cited by 4 publications

(2 citation statements)

References 18 publications

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“…[11][12][13][14] Most studies on photoconductive antennas reported in the literature have thus far used the DC bias coplanar stripline, with little consideration of its effects on the overall performance of the antenna. [15] The DC bias stripline must be considered as a radiating element, because its magnitude and orientation surface currents influence the emitted power and the polarization of the terahertz radiation characteristics.…”

Section: Introductionmentioning

confidence: 99%

Impact of varying the DC bias stripline connection angle on terahertz coplanar stripline dipole antenna characteristics

Nguyen

Kim²

2013

Journal of Electromagnetic Waves and Applications

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We investigated the dependence of the input impedance and radiation characteristics on the connection angle between the DC bias stripline and the center dipole of a terahertz coplanar stripline dipole antenna in a semi-infinite substrate. Three connection angles, namely 0°(typical horizontal connection), 45°(diagonal connection), and 90°(vertical connection), were examined and an overall performance comparison was provided. The antenna with a sufficiently long bias stripline exhibited a traveling-wave behavior with stable impedance variation, regardless of the connection angle between the DC bias stripline and the center dipole. The antenna with diagonal and vertical bias connections performed much better than the typical H-shaped electrode with a horizontal bias connection in terms of radiation characteristics exhibiting flat gain and low frequency cut-off of the radiation efficiency. In addition, the antenna with a diagonal bias connection exhibited a better radiation pattern and more efficient use of a given substrate area than that with a vertical bias connection. The result indicates that in terms of the overall aspect of the terahertz stripline dipole antenna designs on a high-dielectric-constant substrate, the antenna with a diagonal bias connection is the best configuration.

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Section: Introductionmentioning

confidence: 99%

Impact of varying the DC bias stripline connection angle on terahertz coplanar stripline dipole antenna characteristics

Nguyen

Kim²

2013

Journal of Electromagnetic Waves and Applications

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“…Although various components have been developed for THz applications [5][6][7][8][9][10][11][12][13][14][15][16][17][18], high power, low cost, and compact THz sources are not readily available [19]. With the rapid advancement of multi-physics based codes, which provide the possibility of simulating the nonlinear beam-wave interaction dynamics [20][21][22][23][24], extending the operating frequency of the existing microwave tube designs [25][26][27][28][29] has become a promising approach for developing compact and powerful THz sources [30][31][32][33][34][35][36].…”

Section: Introductionmentioning

confidence: 99%

DESIGN AND 3-D PARTICLE-IN-CELL SIMULATION OF A 140 GHz SPATIAL-HARMONIC MAGNETRON

Esfahani¹,

Tayarani²,

Schunemann³

2013

PIER

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Abstract-This paper discusses design procedure and 3-D numerical simulation of a 140 GHz spatial-harmonic magnetron (SHM). The well known scaling laws and an approximate approach based on single harmonic analysis are used to determine the interaction space dimensions and the optimum geometrical parameters of the side resonators. Numerical simulations of the SHM were performed using CST-Particle Studio. Since the simulations are not based on artificial RF priming or assuming restrictive assumptions on the mode of operation or on the number of harmonics to be considered, electromagnetic oscillations grow naturally from noise. The presented SHM shows stable operation in the π/2 − 1-mode at 140 GHz over a range of DC anode voltages extending from 11.3 kV to 11.5 kV and for an axial magnetic flux density equal to 0.79 T. Output power of the SHM varies from 2 kW to 11 kW over these voltages with a maximum efficiency of about 6.8%.

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A traveling-wave stripline dipole antenna on a substrate lens at terahertz frequency

Nguyen

Rotermund

2014

Current Applied Physics

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Enhanced Center Frequency of Terahertz Pulse Emission from Photoconductive Antenna

Cited by 4 publications

References 18 publications

Impact of varying the DC bias stripline connection angle on terahertz coplanar stripline dipole antenna characteristics

Impact of varying the DC bias stripline connection angle on terahertz coplanar stripline dipole antenna characteristics

DESIGN AND 3-D PARTICLE-IN-CELL SIMULATION OF A 140 GHz SPATIAL-HARMONIC MAGNETRON

A traveling-wave stripline dipole antenna on a substrate lens at terahertz frequency

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