Improved frequency tripler with integrated single-barrier varactor

Meola, Renato; Freyer, J.; Claassen, Manfred

doi:10.1049/el:20000618

Cited by 19 publications

(7 citation statements)

References 3 publications

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“…Power output in this case was limited only by the maximum available input power. These results represent an essential improvement in efficiency as compared to the mainly applied HBV triplers [18,24,42] and make the ASV a promising candidate for frequency multipliers at millimetre-or submillimetre-wave applications.…”

Section: Resultsmentioning

confidence: 95%

Power generation at millimetre‐wave frequencies using GaAs/GaAlAs triplers

Krach

Freyer

Claassen

2004

phys. stat. sol. (c)

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In this project, two frequency tripler concepts for the generation of output power in the millimetre-wave range up to 230 GHz have been investigated. Both concepts make use of the advantages of symmetrical devices, whereby the first is based on a HBV (Hetero-Barrier Varactor) monolithically integrated into the rf-circuit on GaAs-substrate whereas the second one uses an ASV (Anti-serial Schottky Varactor) as nonlinear device, realised by quasi-monolithic integration on quartz-substrate. By the help of a theoretical model of both structures, design and optimisation criteria for the varactors and the tripler circuits have been deduced and verified experimentally. The results lead to an output power of 10 mW at a frequency of 210 GHz with a conversion efficiency of 13.5 % for the HBV and an output power of 15 mW at 228 GHz with a conversion efficiency of 22 % for the ASV frequency tripler.

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Section: Resultsmentioning

confidence: 95%

Power generation at millimetre‐wave frequencies using GaAs/GaAlAs triplers

Krach

Freyer

Claassen

2004

phys. stat. sol. (c)

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“…HBV triplers (x3) have been shown to provide almost 100 mW around 100 GHz [3] and also recently a state-of-the-art efficiency of more than 21% at an output frequency of 102 GHz has been achieved [4]. At short millimetre wavelengths, corresponding to a frequency of 250 GHz, 10 mW and at least 10% efficiency have been demonstrated [5][6][7]. According to detailed analysis, there is room for a five fold improvement in terms of output power in the millimetre wavelength range [8,9].…”

Section: Introductionmentioning

confidence: 99%

High Efficiency HBV Multipliers

Stake

Emadi

Sadeghi

et al. 2006

2006 European Microwave Integrated Circuits Conference

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We report on the design and MBE-growth of heterostructure barrier varactor (HBV) diode materials. The quality and performance of in-house HBV materials are presented. The design methodology and electro-thermal simulations of high power HBV multipliers for signal generation in the frequency range 100 -300 GHz are also presented. Finally, a state-of-the-art tripler efficiency of 21% and a quintupler efficiency of 11% for W-band multipliers have been demonstrated.Index Terms -Heterostructure barrier varactor, Frequency multiplier, Reliability study, Millimetre wave source.

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“…A major advantage of using HBVs rather than e. g. reverse-biased Schottky varactors is that the power handling capacity can be improved by stacking several barriers epitaxially, and thereby increasing the breakdown voltage. State-of-the-art output power level results from HBV frequency triplers of 1250 mW at 99 GHz [3], 10 mW at 210 GHz [4] and 9 mW at 247.5 GHz [5] have been demonstrated. However, the device geometries and circuit topologies used are generally optimized for a high conversion efficiency at high frequencies rather than for a maximum power handling capacity.…”

Section: Introductionmentioning

confidence: 99%