GaAs Schottky Components for 300 GHz Communication Systems using a Resonator Impedance Matching Approach

Lancaster, M.J.; Guo, Cheng; Powell, Jeff R.; Wang, Hui; Parow-Souchon, Kai; Huggard, P. G.; Wang, Yi

doi:10.1109/irmmw-thz.2019.8874014

Cited by 3 publications

(2 citation statements)

References 4 publications

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“…These simulated results demonstrate that a maximum phase shift of 195° at around 41.5 GHz can be achieved with average losses of 2.5 dB, when using a periodic array of the unit cells. When paired with the nano-second switching speed enabled by GaAs air-bridged Schottky diodes, this demonstrates an unprecedented combination of low loss phase shift and switching speed 19 .…”

Section: Resultsmentioning

confidence: 95%

Air-bridged Schottky diodes for dynamically tunable millimeter-wave metamaterial phase shifters

Vassos

Churm

Powell

et al. 2021

Sci Rep

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A low loss metamaterial unit cell is presented with an integrated GaAs air-bridged Schottky diode to produce a dynamically tunable reflective phase shifter that is capable of up to 250° phase shift with an experimentally measured average loss of 6.2 dB at V-band. The air-bridged Schottky diode provides a tuneable capacitance in the range between 30 and 50 fF under an applied reverse voltage bias. This can be used to alter the resonant frequency and phase response of a split patch unit cell of a periodic metasurface. The air-bridged diode die, which is flip-chip soldered to the patch, has ultra-low parasitic capacitance and resistance. Simulated and measured results are presented which verify the potential for the attainment of diode switching speeds with acceptable losses at mmWave frequencies. Furthermore the study shows that this diode-based unit cell can be integrated into metamaterial components, which have potential applications in future mmWave antenna beam-steering, intelligent reflecting surfaces for 6G communications, reflect-arrays, transmit-arrays or holographic antennas.

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Section: Resultsmentioning

confidence: 95%

Air-bridged Schottky diodes for dynamically tunable millimeter-wave metamaterial phase shifters

Vassos

Churm

Powell

et al. 2021

Sci Rep

Self Cite

View full text Add to dashboard Cite

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“…Waveguide filters can be used to simultaneously match the output of one device and the input of the subsequent device, as shown in [51] and in Figure 20…”

Section: Towards Thz Applicationsmentioning

confidence: 99%

Integrated Filter–Amplifiers: A Comprehensive Review

Gao

Shang

et al. 2022

IEEE Microwave

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Optimization of terahertz monolithic integrated frequency multiplier based on trap-assisted physics model of THz Schottky barrier varactor

Qi¹,

Jin²,

Liu³

et al. 2020

Chinese Phys. B

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The optimization of high power terahertz monolithic integrated circuit (TMIC) is systemically studied based on the physical model of the Schottky barrier varactor (SBV) with interface defects and tunneling effect. An ultra-thin dielectric layer is added to describe the extra tunneling effect and the damping of thermionic emission current induced by the interface defects. Power consumption of the dielectric layer results in the decrease of capacitance modulation ration (C max/C min), and thus leads to poor nonlinear C–V characteristics. The proposed Schottky metal-brim (SMB) terminal structure could improve the capacitance modulation ration by reducing the influence of the interface charge and eliminating the fringing capacitance effect. Finally, a 215 GHz tripler TMIC is fabricated based on the SMB terminal structure. The output power is above 5 mW at 210–218 GHz and the maximum could exceed 10 mW at 216 GHz, which could be widely used in terahertz imaging, radiometers, and so on. This paper also provides theoretical support for the SMB structure to optimize the TMIC performance.

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GaAs Schottky Components for 300 GHz Communication Systems using a Resonator Impedance Matching Approach

Cited by 3 publications

References 4 publications

Air-bridged Schottky diodes for dynamically tunable millimeter-wave metamaterial phase shifters

Air-bridged Schottky diodes for dynamically tunable millimeter-wave metamaterial phase shifters

Integrated Filter–Amplifiers: A Comprehensive Review

Optimization of terahertz monolithic integrated frequency multiplier based on trap-assisted physics model of THz Schottky barrier varactor

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