A terahertz Yagi-Uda antenna for high input impedance

Park, Y.; Kim, S.; Han, Haewook; Park, I.; Lim, H.

doi:10.1109/icimw.2008.4665532

Cited by 6 publications

(4 citation statements)

References 5 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In contract, the reported THz antenna shows the good total efficiency performance in wideband. This comparison demonstrates that the proposed antenna overall performance is superior to the antenna designs described in References 9,10,16,20‐22,25‐27.…”

Section: Comparison With State Of the Artmentioning

confidence: 75%

“…The proposed PCA with lens have wideband impedance (5 THz), 3 dB AR bandwidth (~4 THz), high directivity (7.7‐11 dBi), and half‐power beam width (HPBW) (34°‐62°) characteristics. The observed performance of the developed antenna is overall superior than that of the reported characteristics of impedance matching bandwidth, AR bandwidth, directivity, and HPBW in References 9,10,16,20‐22,25‐27. It makes the proposed design a favorable candidate for the aforementioned applications in THz imaging and sensing domain.…”

Section: Introductionmentioning

confidence: 87%

“…Table 4 lists the comparison of the proposed log‐spiral PCA with the legacy designs. Table 4 clearly shows that the impedance bandwidth of the proposed CP THz antenna is 5 THz which is highest among all the legacy designs 9,10,16,20‐22,25‐27 . The reported design of 22 have the directivity of 18.52, however this design is reported only for single‐frequency operation at 0.8 THz with limited bandwidth as compared to the proposed design.…”

Section: Comparison With State Of the Artmentioning

confidence: 92%

See 2 more Smart Citations

Full wave numerical analysis of wideband and high directive log spiralTHzphotoconductive antenna

Dhiflaoui

Yahyaoui

Yousaf

et al. 2020

Int J Numerical Modelling

View full text Add to dashboard Cite

This study presents, for the first time, a novel design of ultra-wideband (UWB), circularly polarized and highly directive log-spiral THz photoconductive antenna. The proposed antenna is simulated in High Frequency Structure Simulator using gold as the antenna electrode material which is backed by a quartz substrate (ε r = 3.78, tan δ = 0.0001) and hemispherical silicon-based lens with a diameter of 140 μm. A comprehensive detailed parametric study of the antenna design parameters is performed in the frequency range of 1 to 6 THz for the optimal design of the developed antenna structure. The optimal antenna structure with integrated lens has UWB characteristics with −10 dB impedance bandwidth of 5 THz and 3 dB axial ratio bandwidth of around 4 THz. The observed directivity and half-power beam width of the presented design varies in the range 5 to 12 dBi and 34 to 62 , respectively, for the frequency range of 1 to 4 THz. The wideband, high directivity as well as highefficiency (>50%) characteristics of the proposed design make it a favorable choice for the THz sensing and imaging applications.

show abstract

Section: Comparison With State Of the Artmentioning

confidence: 75%

Section: Introductionmentioning

confidence: 87%

Section: Comparison With State Of the Artmentioning

confidence: 92%

See 1 more Smart Citation

Full wave numerical analysis of wideband and high directive log spiralTHzphotoconductive antenna

Dhiflaoui

Yahyaoui

Yousaf

et al. 2020

Int J Numerical Modelling

View full text Add to dashboard Cite

show abstract

“…Therefore, the reduced input resistance of the THz antenna leads to a poorer matching efficiency. A full wavelength dipole has been used to drive a Yagi-Uda array to achieve an input resistance of 2.6 kΩ [ 30 ]. Moreover, a 3.3 kΩ input resistance has been achieved by implementing an isolating metallic ground plane with a dipole placed on a thin dielectric slab [ 31 ].…”

Section: Introductionmentioning

confidence: 99%

An Efficient Photomixer Based Slot Fed Terahertz Dielectric Resonator Antenna

Yin

Khamas

2021

Sensors

View full text Add to dashboard Cite

A slot fed terahertz dielectric resonator antenna driven by an optimized photomixer is proposed, and the interaction of the laser and photomixer is studied. It is demonstrated that in a continuous wave terahertz photomixing scheme, the generated THz power is proportional to the 4th power of the surface electric field of photocondutive layer. Consequently, the optical to THz conversion efficiency of the proposed photomixer has an enhancement factor of 487. This is due to the fact that the surface electric field of the proposed photomixer with a 2D-Photonic Crystal (PhC) superstrate has been improved from 2.1 to 9.9 V/m, which represents a substantial improvement. Moreover, the electrically thick Gallium-Arsenide (GaAs) supporting substrate of the device has been truncated to create a dielectric resonator antenna (DRA) that offers a typical radiation efficiency of more than 90%. By employing a traditional coplanar strip (CPS) biasing network, the matching efficiency has been improved to 24.4%. Therefore, the total efficiency has been considerably improved due to the enhancements in the laser-to-THz conversion, as well as radiation and matching efficiencies. Further, the antenna gain has been improved to 9dBi at the presence of GaAs superstrate. Numerical comparisons show that the proposed antenna can achieve a high gain with relatively smaller dimensions compared with traditional THz antenna with Si lens.

show abstract

Yagi-Uda antenna with U-shaped dipole for a THz photomixer

Nguyen

Han

2009

2009 34th International Conference on Infrared, Millimeter, and Terahertz Waves

View full text Add to dashboard Cite

A terahertz Yagi-Uda antenna for high input impedance

Cited by 6 publications

References 5 publications

Full wave numerical analysis of wideband and high directive log spiralTHzphotoconductive antenna

Full wave numerical analysis of wideband and high directive log spiralTHzphotoconductive antenna

An Efficient Photomixer Based Slot Fed Terahertz Dielectric Resonator Antenna

Yagi-Uda antenna with U-shaped dipole for a THz photomixer

Contact Info

Product

Resources

About