Two-Stage Broadband High-Gain W-Band Amplifier Using 0.1-&amp;lt;tex&amp;gt;$mu$&amp;lt;/tex&amp;gt;m Metamorphic HEMT Technology

We have developed a 400-500 GHz low-noise balanced SIS (Superconductor Insulator Superconductor) mixer, which is based on a waveguide RF quadrature hybrid coupler. The RF quadrature hybrid was designed and fabricated as a broadband hybrid with good performance at 4 K. The fabricated RF quadrature hybrid was measured at room temperature with a submillimeter vector network analyzer to check amplitude and phase imbalance between two output ports. Then the balanced mixer was assembled with the RF hybrid, two DSB mixers, and a 180 • IF hybrid. Several important parameters such as noise temperature, LO power reduction, and IF spectra were measured. The LO power reduction is defined as how much LO power the balanced mixer saves compared with a typical single-ended mixer. The measured noise temperature of the balanced mixer was ∼ 55 K at the band center which corresponds to ∼ 3 times the quantum noise limit (hf/k) in DSB, and ∼ 120 K at the band edges. The noise performance over LO frequency was almost the same as that of the worse DSB mixer used in the balanced mixer. In addition the LO power required for the balanced mixer is ∼ 11 dB less than that of the single-ended mixers.

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“…The covering frequencies are mainly around W band (eg. [27][28][29][30][31]) and 150 GHz band (eg. [32]).…”

Section: Introductionmentioning

confidence: 99%

A 400–500 GHz Balanced SIS Mixer with a Waveguide Quadrature Hybrid Coupler

Serizawa

Sekímoto

Kamikura

et al. 2008

Int J Infrared Milli Waves

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“…Si RF MOSFETs compete successfully with GaAs-based RF FETs in terms of speed. The only GaAs-based FETs showing much higher f T and f max (and much lower noise figures) than Si MOSFETs are metamorphic GaAs HEMTs (GaAs mHEMT) [24][25][26]. This transistor type is still under development and commercially not yet available.…”

Section: Resultsmentioning

confidence: 99%

Performance trends of Si-based RF transistors

Schwierz

Schippel

2007

Microelectronics Reliability

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“…Dual-mode filter is the most common multiple-mode filter, which has been analyzed deeply in many literatures with various configurations [2]. Triple-mode or other multimode microstrip planar filters are reported in [3][4][5][6][7][8][9][10][11]. Xue and coworkers proposed a compact microstrip resonant cell structure, which is essentially a triple-mode resonator [3].…”

Section: Discussionmentioning

confidence: 99%

Low‐loss W‐band CPW bandpass filter using annular CPW branch‐line coupler with open load stubs

Van

Anh

Kim

et al. 2011

Micro & Optical Tech Letters

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A W‐band coplanar waveguide (CPW) low‐loss annular branch‐line bandpass filter for planar integrated millimeter‐wave circuits is presented. It is designed by using the annular branch‐line coupler as a transversal filtering section by loading the coupled ports of the coupler with suitable open load stubs and taking the isolated port as the output node. The proposed W‐band bandpass filter shows very good performance, insertion‐loss of 0.7 dB with a 14.9% of 3 dB relative bandwidth at center frequency of 94 GHz and return loss is better than −27 dB at the center frequency. The designed and fabricated bandpass filter exhibits the good performance for monolithic integrated millimeter‐wave circuit applications. © 2011 Wiley Periodicals, Inc. Microwave Opt Technol Lett 53:2400–2403, 2011; View this article online at wileyonlinelibrary.com. DOI 10.1002/mop.26264

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Two-Stage Broadband High-Gain W-Band Amplifier Using 0.1-<tex>$mu$</tex>m Metamorphic HEMT Technology

Cited by 32 publications

References 6 publications

A 400–500 GHz Balanced SIS Mixer with a Waveguide Quadrature Hybrid Coupler

A 400–500 GHz Balanced SIS Mixer with a Waveguide Quadrature Hybrid Coupler

Performance trends of Si-based RF transistors

Low‐loss W‐band CPW bandpass filter using annular CPW branch‐line coupler with open load stubs

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