Design of a double balanced mixer based on a novel planar UWB balun

Cao, Xin; Tang, Zongxi; Wang, Fei

doi:10.1587/elex.13.20160026

Cited by 3 publications

(3 citation statements)

References 5 publications

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“…LO power level at 7 GHz with IF=100 MHz Table 1 is the summary and comparison between the proposed mixer and other mixers based on different techniques at UWB frequency range. Thus, the advantage of this design is the implementation of coupled-line balun in UWB mixer design in order to minimize the complexity of the circuit in [16][17][18] that have been used two baluns circuit and four diodes for double balanced mixer. Another important trend is that narrow bandwidth mixers tend to have lower conversion loss in part due to the difficulty in maintaining circuit balance over the wider bandwidth, however, the single balanced mixer in [19] achieves a conversion loss around 12.5 dB and isolation of 20 dB.…”

Section: Coupled-line Balun and Mixer Design 21 Multi-section Coupled-line Balun Designmentioning

confidence: 99%

A coupled-line balun for ultra-wideband single-balanced diode mixer

et al. 2019

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A multi-section coupled-line balun design for an ultra-wideband diode mixer is presented in this paper. The multi-section coupled-line balun was used to interface with the diode mixer in which it can deliver a good impedance matching between the diode mixer and input/output ports. The mixer design operates with a Local Oscillator (LO) power level of 10 dBm, Radio Frequency (RF) power level of -20 dBm and Intermediate Frequency (IF) of 100 MHz with the balun characteristic of 180° phase shift over UWB frequency (3.1 to 10.6 GHz), the mixer design demonstrated a good conversion loss of -8 to -16 dB over the frequency range from 3.1 to 10.6 GHz. Therefore, the proposed multi-section coupled-line balun for application of UWB mixer showed a good isolation between the mixer's ports.

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Section: Coupled-line Balun and Mixer Design 21 Multi-section Coupled-line Balun Designmentioning

confidence: 99%

A coupled-line balun for ultra-wideband single-balanced diode mixer

et al. 2019

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“…The two most popular types of doubly balanced mixers (DBMs) are doubly balanced star mixers (DBSMs) and doubly balanced ring mixers (DBRMs). Research on broadband doubly balanced star mixer (DBSM) and doubly balanced ring mixer (DBRM) has been welldeveloped for decades [6,7,8,9,10,11,12,13,14,15,16].…”

Section: Introductionmentioning

confidence: 99%

Design of a 35–95 GHz fundamental monolithic mixer based on a novel IF extraction structure

Lin

Zhang²,

Jia³

et al. 2019

IEICE Electron. Express

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The letter presents a high-performance doubly balanced ring mixer (DBRM) fabricated by a 0.1 µm GaAs pHEMT process that achieves ultrawide radio-frequency (RF) and intermediate frequency (IF) bandwidths. A multiple-coupled-line Marchand balun is optimized to extend the RF bandwidth. A novel structure is designed to directly extract the IF current from the RF balun without an additional IF coupler. Due to the proposed IF extraction structure, the IF bandwidth is broadened with decreased complexity. The size of the whole chip including the probe GSG pads is 0.95×0.65 mm 2 . The measured results show that the conversion loss is 7.2-11.9 dB for the RF frequency range of 35-95 GHz with an LO power level of 14 dBm and a fixed IF frequency of 1 GHz. In addition, the conversion loss is better than 12 dB for the IF frequency range from DC to 30 GHz under a fixed LO frequency. key words: ultrawide bandwidth, doubly balanced ring mixer (DBRM), Marchand balun, monolithic microwave integrated circuit (MMIC) Classification: Microwave and millimeter-wave devices, circuits, and modules

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“…In the past years, a lot of improvements on baluns have been proposed for lower loss and better phase performance [1,2,3,4]. However, the studies of baluns in mixers are still limited to the impedance transformation [5] and expansion of RF bandwidth [6]. Only a few papers have studied its effect on IF bandwidth, and the bandwidth can hardly exceed the lowest RF frequency [7].…”

Section: Introductionmentioning

confidence: 99%

A GaAs passive mixer with an ultra-wide IF bandwidth

Zhang

Wang

et al. 2017

IEICE Electron. Express

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This paper presents a GaAs double-balanced mixer (DBM) applying an improved Marchand balun. This structure is achieved by adding a frequency-tuning tail capacitor to the end of the imbalanced coil. By using this tail capacitor, the size of balun is greatly reduced and the IF bandwidth is largely extended. The equivalent circuit modeling and working principle of this structure are described in this paper. The RF bandwidth of the proposed mixer is from 6 GHz to 18 GHz. The measurement result shows that the mixer's IF bandwidth ranges from DC to 8 GHz with the conversion loss less than 10 dB. Because of the good amplitude and phase performance of the proposed balun, the LO to IF isolation is also improved. The total chip area is 950 × 600 µm 2 .

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Design of a double balanced mixer based on a novel planar UWB balun

Cited by 3 publications

References 5 publications

A coupled-line balun for ultra-wideband single-balanced diode mixer

A coupled-line balun for ultra-wideband single-balanced diode mixer

Design of a 35–95 GHz fundamental monolithic mixer based on a novel IF extraction structure

A GaAs passive mixer with an ultra-wide IF bandwidth

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