Photoconductive THz Antenna Designs With High Radiation Efficiency, High Directivity, and High Aperture Efficiency

Zhu, Ning Hua; Ziolkowski, Richard W.

doi:10.1109/tthz.2013.2285568

Cited by 70 publications

(32 citation statements)

References 21 publications

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“…The peak measured aperture efficiency for this ERA was found to be 135% at 12.75 GHz and the average aperture efficiency over the 3 dB bandwidth was approximately 90%. It has been confirmed in the literature that η ap can, in some cases, exceed 100% . This occurs because such antennas, for instance the spline profile horn antenna in and the microstrip arrays in and , are not pure aperture antennas and their total radiation is the sum of radiation from the aperture and other sources such as structure edges, or flanges.…”

Section: Discussionmentioning

confidence: 96%

“…It has been confirmed in the literature that η ap can, in some cases, exceed 100% . This occurs because such antennas, for instance the spline profile horn antenna in and the microstrip arrays in and , are not pure aperture antennas and their total radiation is the sum of radiation from the aperture and other sources such as structure edges, or flanges. Similarly, unlike the classical ERAs, the ERA proposed in this letter is not a pure aperture‐type antenna due to strong truncation, however, as in the case of the horn antennas in , η ap can still be a useful figure of merit to quantify its ability to provide high gain in a small lateral area.…”

Section: Discussionmentioning

confidence: 96%

“…It has a measured peak gain of 14.9 dBi and a bandwidth of 18.4%. A capacitive‐loaded printed dipole array, proposed in , has a predicted aperture efficiency of 144%, a peak gain of 11.6 dBi and a bandwidth of 7.1%.…”

Section: Discussionmentioning

confidence: 99%

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A wideband EBG resonator antenna with an extremely small footprint area

Hashmi

Esselle

2015

Micro & Optical Tech Letters

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An electromagnetic band gap resonator antenna (ERA) with an extremely small footprint is presented. The proposed ERA has a peak measured gain of 15.6 dBi and an excellent measured 3dB gain‐bandwidth of 27%. The four‐layer composite superstructure used in this ERA takes the shape of a circular disc with the ground plane radius equal to that of the superstructure. Its footprint area is only 1.7λ02 at the lowest operating frequency. The average measured aperture efficiency of this ERA is nearly 90%. The side lobe levels are well below −12 dB over most of the operating bandwidth and the cross polarization levels are below −17 dB. © 2015 Wiley Periodicals, Inc. Microwave Opt Technol Lett 57:1531–1535, 2015

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Section: Discussionmentioning

confidence: 96%

Section: Discussionmentioning

confidence: 96%

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A wideband EBG resonator antenna with an extremely small footprint area

Hashmi

Esselle

2015

Micro & Optical Tech Letters

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“…Along with these, the terahertz region shows the application in the communication field, especially in point‐to‐point communication . Several broadband applications have also been proposed in terahertz frequency range by the incorporation of lumped resistances in the equivalent circuit modelling . Split‐ring resonators (SRRs), being asymmetric in nature, are sensitive to the polarization orientation of incidence due to the gap in the SRRs .…”

Section: Introductionmentioning

confidence: 99%

Meander‐line‐based defected ground microstrip antenna slotted with split‐ring resonator for terahertz range

Ghosh

Das

Samantaray

et al. 2020

Engineering Reports

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In this article, the performance of a meander-line-based microstrip patch antenna with split-ring resonator (SRR)-based slots and defected ground is analyzed at the terahertz frequency range. The designed antenna shows a multiband application within a frequency range of 3.77 to 6.60 THz and operates over six different frequencies (viz. 3.83 THz, 4.24 THz, 5.12 THz, 5.50 THz, 5.95 THz, and 6.50 THz). A maximum return loss of 37 is achieved over the band of 5.85 to 6.18 THz, while a maximum realized gain of 7.54 dBi and a total efficiency of 54% is obtained at 4.24 THz. The ground and radiating elements of the antenna are made of gold. Silicon dioxide is used as a substrate material. The antenna simulation is performed and reported in this study. The proposed antenna finds its applications in the detection of colon cancer, skin cancer, brain tumor, drug detection, and communication fields for point-to-point communication purposes. K E Y W O R D S defected ground, meander line, microstrip antenna, SRR slot, terahertz range 1This is an open access article under the terms of the Creative Commons Attribution License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited.

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“…However, in both of these studies a thin ∼ 12 µm grounded GaAs substrate has been used in conjunction with a cavity that has been created underneath the photomixer leaving an unsupported 1.5 µm layer. A number of THz antenna configurations have been reported in [15] with a realized gain of 14.3 dBi assuming a photoconductive switch source impedance of 50 Ω, and using a GaAs substrate thickness range of 56-79 µm. In a recent study, measured and simulated results have been reported for a THz meander dipole with improved radiation and matching efficiencies [16].…”

Section: Introductionmentioning

confidence: 99%

A Photomixer Driven Terahertz Dipole Antenna With High Input Resistance and Gain

Yin¹,

Kennedy²,

Sarma³

et al. 2015

PIER M

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Abstract-A terahertz (THz) antenna is proposed that offers high input resistance and gain in the presence of an electrically thick GaAs substrate. The antenna is centrally fed using two vertical probes connected to a photomixer on a thin low temperature grown gallium arsenide (LTG-GaAs) film which is supported by the GaAs substrate. An input impedance of ∼ 3.3 kΩ has been achieved using a dipole antenna that is printed on a thin dielectric slab, and isolated from the supporting substrate using a metal ground plane. A square aperture has been introduced to facilitate the illumination of the photomixer with two laser beams. Furthermore, a frequency selective surface (FSS) has been incorporated in the configuration, which results in a broadside gain of ∼ 19 dBi at a resonance frequency of 0.97 THz.

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Photoconductive THz Antenna Designs With High Radiation Efficiency, High Directivity, and High Aperture Efficiency

Cited by 70 publications

References 21 publications

A wideband EBG resonator antenna with an extremely small footprint area

A wideband EBG resonator antenna with an extremely small footprint area

Meander‐line‐based defected ground microstrip antenna slotted with split‐ring resonator for terahertz range

A Photomixer Driven Terahertz Dipole Antenna With High Input Resistance and Gain

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