An All-Solid-State Broad-Band Frequency Multiplier Chain at 1500 GHz

Chattopadhyay, Goutam; Schlecht, Erich; Ward, J.; Gill, John; Javadi, Hamid; Maiwald, Frank; Mehdi, Imran

doi:10.1109/tmtt.2004.827042

Cited by 160 publications

(70 citation statements)

References 19 publications

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“…With current terahertz frequency multipliers, power is measured in microwatts rather than milliwatts. The current state-of-the-art at room temperature is 3 W at 1.9 THz [12], 15-20 W at 1.5-1.6 THz [13], [14], and 100 W at 1.2 THz [15]. As predicted in [16], these powers improve dramatically upon cooling: the same sources produce, respectively, 30, 100, and 200 W at 120 K.…”

Section: Introductionmentioning

confidence: 84%

A Frequency-Multiplied Source With More Than 1 mW of Power Across the 840–900-GHz Band

Maestrini

Ward

Gill

et al. 2010

IEEE Trans. Microwave Theory Techn.

113

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Abstract-We report on the design, fabrication, and characterization of an 840-900-GHz frequency multiplier chain that delivers more than 1 mW across the band at room temperature with a record peak power of 1.4 mW at 875 GHz. When cooled to 120 K, the chain delivers up to 2 mW at 882 GHz. The chain consists of a power amplifier module that drives two cascaded frequency triplers. This unprecedented output power from an electronic source is achieved by utilizing in-phase power-combining techniques. The first stage tripler uses four power-combined chips while the last stage tripler utilizes two power-combined chips. The source output was analyzed with a Fourrer transform spectrometer to verify signal purity.

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Section: Introductionmentioning

confidence: 84%

A Frequency-Multiplied Source With More Than 1 mW of Power Across the 840–900-GHz Band

Maestrini

Ward

Gill

et al. 2010

IEEE Trans. Microwave Theory Techn.

113

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“…By using the several commercially available multipliers in chain, THz radiation can be generated starting from an MW synthesizer. Recently, the JPL group has produced a multiplier chain of the GaAs SB diodes (Chattopadhyay et al 2004) by monolithic process on membrane substrate, named as GaAs monolithic membrane diode (MOMED). The output frequency of MOMED has reached 3 THz.…”

Section: Frequency Multipliermentioning

confidence: 99%

THz and Submillimeter‐wave Spectroscopy of Molecular Complexes

Tanaka

Harada

Yamada

2011

Handbook of High‐resolution Spectroscopy

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This article reviews the recent progress of terahertz (THz) and submillimter‐wave (SMMW) spectroscopy in the frequency range of 10–300 cm −1 and its application to the study of weakly bound molecular complexes. The first section describes the light sources used for generating THz radiation, which includes the backward‐wave oscillators (BWO), the multipliers with the GaAs monolithic membrane diode (MOMED), and the supperlattice electronic devices (SLED), as well as the tunable far infrared (TuFIR) lasers. In the following section, we introduce extremely sensitive spectrometers developed for observing very weakly bound molecular complexes, such as the intra‐cavity OROTRON spectrometer and the millimeterwave‐Fourier transform microwave (MMW‐FTMW) double resonance spectrometer. We also review the traditional millimeter‐wave spectrometers, electric‐resonance optothermal spectrometers (EROS), and the tunable far‐infrared (TuFIR) laser spectrometers, which have also been applied successfully to study weakly bound molecular complexes. In the last section, the recent topics of the THz and millimeterwave spectroscopy of molecular complexes are reviewed in the four subsections; (i) Rare gas‐molecule complexes: Rg‐HX, Rg‐CO, and Rg‐HCN, (ii) dimers: (CO) 2 , CO‐N 2 , HCN‐H 2 , and (H 2 O) 2 , (iii) water complexes (H 2 O) n , with n up to 6, and (iv) ion and radical complexes: ArSH, ArH 2 O, H 2 OHO 2 , and ArH 3 + .

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“…The cross-bar balanced mixers and multipliers are preferred in millimeterwave bands for merits of low loss, high isolation and broad band, owing to the inherent mode isolation between the radio frequency (RF) and local oscillator (LO) signals or between the input and output signals [1][2][3][4][5][6][7][8]. In cross-bar mixers, the cross-bar balanced architecture with a pair of balanced diodes physically locates inside either the LO waveguide [1] or the RF waveguide [2][3][4].…”

Section: Introductionmentioning

confidence: 99%

“…In cross-bar mixers, the cross-bar balanced architecture with a pair of balanced diodes physically locates inside either the LO waveguide [1] or the RF waveguide [2][3][4]. In cross-bar multipliers, the cross-bar balanced architecture with a pair of balanced diodes physically locates inside either the input waveguide [5][6][7] or the output waveguide [8]. However, the design of the cross-bar hybrid relies on the cross-bar structure with a pair of balanced diodes, which cannot be pre-designed as a simplex hybrid like the rat-race hybrid or the others [9,10].…”

Section: Introductionmentioning

confidence: 99%

An Improved Wideband 180-Degree Hybrid Applied to Balanced Mixer

Zhao¹,

Zhang²,

Liu³

et al. 2015

PIER Letters

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Abstract-In this paper, an improved wideband millimeter-wave 180 • hybrid is proposed to apply to balanced mixers and multipliers. The proposed hybrid consists of a transition of standard waveguide to suspended coplanar waveguide (SCPW) and a transition of SCPW to suspended stripline. According to the inherent electromagnetic field characteristics of the two transitions, the proposed hybrid has merits of broadband power distribution and high isolation, which does not rely on resonant circuits. The measured insertion losses and isolation of two transitions at Ka-band are typically 1.4 dB and 25 dB, respectively. To verify the application of the proposed hybrid, A W-band single balanced mixer based on the hybrid has been designed and fabricated. The measured single-sideband (SSB) conversion losses of the fabricated mixer are less than 9.5 dB for the radio frequency (RF) range from 80 to 108 GHz. The presented hybrid has been proven to be efficient for the design of millimeter-wave balanced mixers and could be well applied in multipliers and other integrated circuits.

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An All-Solid-State Broad-Band Frequency Multiplier Chain at 1500 GHz

Cited by 160 publications

References 19 publications

A Frequency-Multiplied Source With More Than 1 mW of Power Across the 840–900-GHz Band

A Frequency-Multiplied Source With More Than 1 mW of Power Across the 840–900-GHz Band

THz and Submillimeter‐wave Spectroscopy of Molecular Complexes

An Improved Wideband 180-Degree Hybrid Applied to Balanced Mixer

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