An Improved Wideband All-Pass I/Q Network for Millimeter-Wave Phase Shifters

Kim, Sang Young; Kang, Dong-Woo; Koh, Kwang-Jin; Rebeiz, Gabriel M.

doi:10.1109/tmtt.2012.2212027

Cited by 105 publications

(29 citation statements)

References 20 publications

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“…8. The power consumption of the high-resolution phase shifter is P h = 15mW [30], that of the moderate-resolution phase shifter is P m = 14mW [42] and that of the 1-bit low-resolution phase shifter is P l = 10mW [43]. The power consumption of switches is P SW = 1mW [44].…”

Section: A Simulation Results Of Mmwave Point-to-point Mimo Systemsmentioning

confidence: 99%

Dynamic Hybrid Precoding Relying on Twin- Resolution Phase Shifters in Millimeter- Wave Communication Systems

Feng

Shen

Gao

et al. 2021

IEEE Trans. Wireless Commun.

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Hybrid analog/digital precoding in millimeter-wave (mmWave) multi-input multi-ouput (MIMO) systems is capable of achieving the near-optimal full-digital performance at reduced hardware cost and power consumption compared to its full-RF digital counterpart. However, having numerous phase shifters is still costly, especially when the phase shifters are of high resolution. In this paper, we propose a novel twin-resolution phase-shifter network for mmWave MIMO systems, which reduces the power consumption of an entirely high-resolution network, whilst mitigating the severe array gain reduction of an entirely low-resolution network. The connections between the twin phase shifters having different resolutions and the antennas are either fixed or dynamically configured. In the latter, we jointly design the phase-shifter network and the hybrid precoding matrix, where the phase of each entry in the analog precoding matrix can be dynamically designed according to the required resolution. This method is slightly modified for the fixed network's hybrid precoding matrix. Furthermore, we extend the proposed method to multiuser MIMO systems and provide its performance analysis. Our simulation results show that the proposed dynamic hybrid precoding method strikes an attractive performance vs. power consumption trade-off. Index Terms-Dynamic hybrid precoding, twin-resolution phase-shifter network, millimeter-wave communication. I. INTRODUCTION M ILLIMETER-wave (mmWave) solutions have become one of the key techniques for next-generation wireless communication systems [1]-[3]. Having plenty of bandwidth at mmWave frequencies relieves the scarcity of spectral resources caused by the explosive growth of data traffic and electronic devices [4]. Nevertheless, mmWave signals inevitably suffer from high path loss [5]. Fortunately, the short wavelength of mmWave carriers enables the application of compact

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Section: A Simulation Results Of Mmwave Point-to-point Mimo Systemsmentioning

confidence: 99%

Dynamic Hybrid Precoding Relying on Twin- Resolution Phase Shifters in Millimeter- Wave Communication Systems

Feng

Shen

Gao

et al. 2021

IEEE Trans. Wireless Commun.

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“…It has good performance in voltage gain, bandwidth and phase error, but it suffers from the capacitance loading effect especially in high frequency. Therefore, an improved degenerated-Q QAF which is not sensitive to the loading capacitance is proposed in [22,23]. In this design, resistor R is connected in series to the inductor L and capacitor C in the orthogonal differential network to reduce the Q value of the QAF and its sensitivity to the loading capacitance.…”

Section: Quadrature All-pass Filter (Qaf)mentioning

confidence: 99%

“…For this application, high resolution and high accuracy are necessary for better beam performance. Fully integrated phase shifters have a variety of topologies including passive topology such as LC-based circuit [1,2,3,4], active topology such as active vector generator [5], RC vector generation filter [6], transformer based poly-phase [7], polyphase filter (PPF)-based [8,9,10,11,12,13,14] and quadrature all-pass filter (QAF)-based [15,16,17,18,19,20,21,22,23]. Although the passive phase shifters can achieve high linearity and low power consumption, it lacks high phase resolution, which leads to higher insertion loss, larger chip area and narrow bandwidth.…”

Section: Introductionmentioning

confidence: 99%

A 6–18 GHz 6-bit active phase shifter in 0.13-µm SiGe BiCMOS

Luo

Yao

et al. 2019

IEICE Electron. Express

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A 6-bit digitally controlled active phase shifter is implemented in 0.13-µm SiGe BiCMOS process for 6-18 GHz phased-arrays. An input passive balun with center open stub is applied to split the single input to differential and achieve high amplitude/phase balance. A degenerated-Q quadrature all-pass filter (QAF) is used to generate two orthogonal vectors with high I/Q accuracy over a wide bandwidth and a main digital-toanalog convertor (DAC) controls the I/Q amplitude to achieve 6-bit phase resolution. In addition, a calibration DAC is adopted to compensate the amplitude variations and the phase error introduced by balun and QAF. Consequently, high resolution along with low gain/phase error can be achieved. The phase shifter has achieved root mean square (RMS) phase error of <4.36°, and RMS gain error of <1.04 dB for all 6-bit phase states at 6-18 GHz. The power gain ranges from 0.95 dB at 6 GHz to −1.85 dB at 18 GHz. Input 1 dB compression point (IP −1dB) is 5.4-8 dBm at 6-18 GHz for 0°-phase state. The total power consumption is 74.4 mW, and the overall chip size is 1.8 × 1.3 mm 2 .

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“…In addition, differential quadrature vectors are needed to synthesize all four quadrant phases. In this work, a degenerated Q value quadrature all-pass filter [11] is employed to generate the differential in-phase and quadrature vectors as shown in Fig. 2(a).…”

Section: Differential Quadrature Signal Generator Designmentioning

confidence: 99%

“…Switched-type passive phase shifter [4,5,6,7] has high linearity, but suffers from high insertion loss in silicon process and consumes large chip area to achieve high phase resolution. Active phase shifter [8,9,10,11,12,13] applying vector summing method provides high phase resolution and compact size. These features make it suitable for both handset-side which demands small form factor and basestation-side that applies large-scale phased array for mm-wave massive MIMO.…”

Section: Introductionmentioning

confidence: 99%

A 6-bit 38 GHz SiGe BiCMOS phase shifter for 5G phased array communications

Wang

Liu

et al. 2017

IEICE Electron. Express

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This paper presents a 6-bit 38 GHz vector-summing phase shifter developed for 5G phased array communications. A linear gain adjustment VGA with modified gain control method is presented and is used in phase shifter for vectors weighting. Combined with a degenerated-Q quadrature all-pass filter (QAF) for accurate I/Q generation, high phase resolution is achieved with easy control and compact size. Fabricated in 0.13 um SiGe BiCMOS process, the phase shifter has a measured average insertion loss of 5.7 dB at 38 GHz center frequency, with −3 dB bandwidth of 12 GHz. The RMS phase and gain errors are less than 1.7°and 1.5 dB respectively across 20-45 GHz frequency range over 64 phase states. The chip has a compact core size of 373 um × 311 um and it consumes 11.2 mA from 3 V supply.

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An Improved Wideband All-Pass I/Q Network for Millimeter-Wave Phase Shifters

Cited by 105 publications

References 20 publications

Dynamic Hybrid Precoding Relying on Twin- Resolution Phase Shifters in Millimeter- Wave Communication Systems

Dynamic Hybrid Precoding Relying on Twin- Resolution Phase Shifters in Millimeter- Wave Communication Systems

A 6–18 GHz 6-bit active phase shifter in 0.13-µm SiGe BiCMOS

A 6-bit 38 GHz SiGe BiCMOS phase shifter for 5G phased array communications

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