A Compact and High-Linearity 140–160 GHz Active Phase Shifter in 55 nm BiCMOS

Río, David; Gurutzeaga, Iñaki; Berenguer, Roc; Huhtinen, Ismo; Sevillano, Juan F.

doi:10.1109/lmwc.2020.3037162

Cited by 26 publications

(4 citation statements)

References 15 publications

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“…In each quadrant, only one I and one Q amplifier are active. To avoid using inverting and non-inverting amplifiers, the architecture with crossed outputs shown in Figure 2 c is often used [ 3 , 4 , 5 ].…”

Section: State-of-the-art and Proposed Vector Modulatormentioning

confidence: 99%

A 17.8–20.2 GHz Compact Vector-Sum Phase Shifter in 130 nm SiGe BiCMOS Technology for LEO Gateways Receivers

Pino

Khemchandani

San-Miguel-Montesdeoca³

et al. 2023

Micromachines

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This paper presents a novel and compact vector modulator (VM) architecture implemented in 130 nm SiGe BiCMOS technology. The design is suitable for use in receive phased arrays for the gateways of major low Earth orbit (LEO) constellations that operate in the 17.8 to 20.2 GHz frequency range. The proposed architecture uses four variable gain amplifiers (VGA) that are active at any given time and are switched to generate the four quadrants. Compared to conventional architectures, this structure is more compact and produces double the output amplitude. The design offers 6-bit phase control for 360°, and the total root mean square (RMS) phase and gain errors are 2.36° and 1.46 dB, respectively. The design occupies an area of 1309.4 μm × 1783.8 μm (including pads).

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Section: State-of-the-art and Proposed Vector Modulatormentioning

confidence: 99%

A 17.8–20.2 GHz Compact Vector-Sum Phase Shifter in 130 nm SiGe BiCMOS Technology for LEO Gateways Receivers

Pino

Khemchandani

San-Miguel-Montesdeoca³

et al. 2023

Micromachines

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“…Phase-shifters are implemented as vector modulators similar to [5] and the 22-bit coefficient word is used to specify the gains in the I and Q components of the vector modulator and the quadrant. In the rest of the document, we refer to a set of 256 of these 22-bit coefficients as a beam configuration.…”

Section: B Beam Controlmentioning

confidence: 99%

Beam Alignment Strategy Under Hardware Constraints for D-Band Communications

Laurent¹,

Cassiau²,

Marnat³

et al. 2022

2022 Joint European Conference on Networks and Communications &Amp; 6G Summit (EuCNC/6G Summit)

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This paper describes the antenna beam alignment strategy of a D-band backhaul link adopted in the DRAGON project. The aim is to continuously compensate for antenna vibrations. This strategy is based on a periodic assessment of beams stored in a codebook, and can be implemented independently in both ends of the link. Hardware requirements coming from the envisioned architecture of the whole transceiver are taken into consideration. In particular, communications among the different involved boards restrict the periodicity at which the beams of the codebook can be assessed. The design of the codebook and the algorithm for beams selection are also discussed. Simulations based on a software specifically developed demonstrate that the solution meets the tracking specifications for an D-band link associated to realistic antenna movements.

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“…Based on system requirements, an on-off switch inside the last stage of a TDM system [22], [23], [24], [25], binary phase-shifter for phase-coded systems [1], [18], [26], [27], [28] or a phase-shifter for phased-array systems [29], [30], [31] is needed. The most common approaches using SiGe for designing a VM are variable gain amplifiers (VGAs) in combination with multiple coupler paths or switching elements [32], [33], [34], [35], [36], [37], Gilbert Cells (GCs) with analog tuning voltages [38], [39], [40], [41], [42], [43], [44], [45], [46], [47], [48], [49], [50], and reflection type phase-shifters [51], [52], [53], [54]. Besides that, GCs with on-chip digital-analog converters (DACs) [55], [56], switchable delay lines [57], modified Doherty amplifier [58], modified GCs [59], and tunable attenuators [60] have been presented.…”

Section: Introductionmentioning

confidence: 99%

Compact and Digitally Controlled D-Band Vector Modulator for Next-Gen Radar Applications in 130 nm SiGe BiCMOS

2023

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Radar systems got very popular in sensing applications in the last two decades besides the traditional military sector. Nowadays, many applications favor multiple-input multiple-output (MIMO) radar over phased-array radar. Here, time-division multiplexing (TDM) and code-division multiplexing (CDM), like a phase-modulated continuous wave (PMCW), are well-known techniques. However, every method needs special components on the MMIC. In this article, a 125 GHz vector modulator (VM) circuit is presented, which can operate as a switchable amplifier in TDM systems, as a binary-phase modulator in CDM systems, and as a phase-shifter in phased-array systems. Based on simulations and S-parameter measurements, the VM itself and the three different operating modes are analyzed. We also present a technique to separate coupler imperfections from the S-parameter measurements to analyze the VM separately. We designed the VM with the B11HFC silicon-germanium technology ( f t / f max = 250/370 GHz), using both HBTs (heterojunction bipolar transistors) and CMOS transistors. Inside the VM, two cross-connected power amplifiers (PAs) are fed by an in-phase (I), and two cross-connected PAs are fed by a quadrature-phase (Q) signal. The four PAs are controlled by a 4-bit interface to switch them on or off, thus generating output signals in the range of 0 • to 360 • .

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A Compact and High-Linearity 140–160 GHz Active Phase Shifter in 55 nm BiCMOS

Cited by 26 publications

References 15 publications

A 17.8–20.2 GHz Compact Vector-Sum Phase Shifter in 130 nm SiGe BiCMOS Technology for LEO Gateways Receivers

A 17.8–20.2 GHz Compact Vector-Sum Phase Shifter in 130 nm SiGe BiCMOS Technology for LEO Gateways Receivers

Beam Alignment Strategy Under Hardware Constraints for D-Band Communications

Compact and Digitally Controlled D-Band Vector Modulator for Next-Gen Radar Applications in 130 nm SiGe BiCMOS

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