47.8 GHz InP HBT quadrature VCO with 22% tuning range

Hadziabdic, Dzenan; Johansen, Tom K.; Krozer, Viktor; Konczykowska, A.; Riet, M.; Jorge, F.; Godin, J.

doi:10.1049/el:20073347

Cited by 6 publications

(1 citation statement)

References 3 publications

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“…Wireless transceivers usually adopt the quadrature local oscillation signaling scheme to reject unwanted image signals during the up-or down-conversion of the communication signals. In published papers, the most commonly used structure is the one using two pairs of cross-coupled VCOs connected by parallel or series coupling transistors [1][2][3][4]. However, such a structure is difficult to operate above 20 GHz because of the device delay of the cross-coupling transistors and the parasitic effect of the interconnections inside the circuits [5][6][7][8].…”

Section: Introductionmentioning

confidence: 99%

Design of Cmos Quadrature Vco Using on-Chip Trans-Directional Couplers

Shie¹,

Cheng²,

Chou³

et al. 2010

PIER

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Abstract-This work presents a quadrature voltage-controlled oscillator (QVCO) realized by on-chip trans-directional (TRD) couplers. The TRD coupler is implemented by sections of parallelcoupled lines connected by shunt capacitors periodically. The TRD couplers allow decoupling the DC path between input and output. Thus, it can make connections with active circuits easier, eliminating some off-chip biasing circuits. Since the quadrature signals are generated by 90 • hybrid couplers, the oscillator core can be optimized for circuit performance without considering the generation of quadrature signals. A Ka band QVCO fabricated in CMOS 0.18 µm technology was designed to verify the effectiveness of the proposed QVCO structure. The measurement results reveal that the quadrature output signals of QVCO have about −1.52 dBm output powers with less than 1 dB amplitude imbalance and less than 6 • phase difference in the frequency range of 31.9 to 32.7 GHz. The best measured phase noise of the QVCO is −110.6 dBc/Hz at 1 MHz offset from the center frequency. The figure-of-merit of the circuit is 187.5 dBc/Hz.

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Section: Introductionmentioning

confidence: 99%

Design of Cmos Quadrature Vco Using on-Chip Trans-Directional Couplers

Shie¹,

Cheng²,

Chou³

et al. 2010

PIER

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InP DHBT MMICs for millimeter-wave front-ends

Johansen

Hadziabdic

Krozer

2009

2009 SBMO/IEEE MTT-S International Microwave and Optoelectronics Conference (IMOC)

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Millimeter-Wave Integrated Circuit Design for Wireless and Radar Applications

et al. 2006

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Abstract-This paper describes a quadrature voltagecontrolled oscillator (QVCO), frequency doubler, and subharmonic mixer (SHM) for a millimeter-wave (mm-wave) frontend implemented in a high-speed InP DHBT technology. The QVCO exhibits large tuning range from 38 to 47.8 GHz with an output power around -15 dBm. The frequency doubler is based on a novel feedback network and demonstrates an output power of -11.5 dBm at an input frequency of 31.4 GHz. The SHM shows a maximum conversion gain at 45 GHz of 10.3 dB with an LO power of only 0 dBm. The mixer is broad-band with more than 7 dB conversion gain from 40-50 GHz. To the authors knowledge the QVCO, frequency doubler, and SHM presents the first mmwave implementations of these circuits in InP DHBT technology.

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47.8 GHz InP HBT quadrature VCO with 22% tuning range

Cited by 6 publications

References 3 publications

Design of Cmos Quadrature Vco Using on-Chip Trans-Directional Couplers

Design of Cmos Quadrature Vco Using on-Chip Trans-Directional Couplers

InP DHBT MMICs for millimeter-wave front-ends

Millimeter-Wave Integrated Circuit Design for Wireless and Radar Applications

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