Low-Loss Highly Linear Integrated Passive Phase Shifters for 5G Front Ends on Bulk CMOS

Elkholy, Mohamed; Shakib, Sherif; Dunworth, Jeremy; Aparin, V.; Entesari, Kamran

doi:10.1109/tmtt.2018.2859994

Cited by 45 publications

(16 citation statements)

References 16 publications

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“…These advancements counteract the trade-off in STPS, where an increase in resolution typically comes with increase in area and losses, as it is often obtained by cascading extra sections. Although adding varactors does not lead to a direct increase in area, it is not possible in standard STPS topologies, as they normally switch between two different network topologies, and not different capacitors (e.g., Bypass/Low-pass in [35]).…”

Section: Discussionmentioning

confidence: 99%

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Variable-Phase All-Pass Network Synthesis and Its Application to a 14–54 GHz Multiband Continuous-Tune Phase Shifter in Silicon

Anjos

Schreurs

Vandenbosch

et al. 2020

IEEE Trans. Microwave Theory Techn.

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This work presents a novel synthesis procedure to implement variable-phase all-pass networks (VP-APNs). The synthesis procedure is based on linear-phase all-pass transfer functions, enabling implementation at millimeter-waves. Using the proposed synthesis, VP-APNs with analog and digital control are implemented for the first time in silicon. Using 0.25 µm BiCMOS, the VP-APNs are manufactured and measured, validating the synthesis procedure. Finally, the validated VP-APNs are combined to realize a phase-shifter. By combining the analog and digital controlled networks, we obtain a continuous-tune phase-shifter with multi-band capabilities, successfully covering several bands from 14 to 54 GHz. This includes Ku-, K-, Ka-and V -band, as well as both 5G bands around 28 GHz and 39 GHz.

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Section: Discussionmentioning

confidence: 99%

“…The phase-difference between two perfectly matched APNs is given by (35). When ω → 0, ∆φ P M (jω) → 0, and also when ω → ∞, ∆φ P M (jω) → 0.…”

Section: A Phase Difference Between Two Apnsmentioning

confidence: 99%

Variable-Phase All-Pass Network Synthesis and Its Application to a 14–54 GHz Multiband Continuous-Tune Phase Shifter in Silicon

Anjos

Schreurs

Vandenbosch

et al. 2020

IEEE Trans. Microwave Theory Techn.

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“…The bi-directional phase shifter architecture also requires design considerations. To support the bi-directional operation, passive phase shifters with reciprocal characteristics have been widely used [20], [21], [24]- [26]. However, to maintain enough phase-shifting coverage and resolution, an insertion loss of around −8 dB is usually induced at RF path by the passive phase-shifting circuitry [27]- [29].…”

Section: Active Bi-directional Phase Shiftermentioning

confidence: 99%

A 28-GHz CMOS Phased-Array Beamformer Utilizing Neutralized Bi-Directional Technique Supporting Dual-Polarized MIMO for 5G NR

Pang

Zheng

Kubozoe

et al. 2020

IEEE J. Solid-State Circuits

106

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This article presents a low-cost and area-efficient 28-GHz CMOS phased-array beamformer chip for 5G millimeter-wave dual-polarized multiple-in-multiple-out (MIMO) (DP-MIMO) systems. A neutralized bi-directional technique is introduced in this work to reduce the chip area significantly. With the proposed technique, completely the same circuit chain is shared between the transmitter and receiver. To further minimize the area, an active bi-directional vector-summing phase shifter is also introduced. Area-efficient and high-resolution active phase shifting could be realized in both TX and RX modes. In measurement, the achieved saturated output power for the TX-mode beamformer is 15.1 dBm. The RX-mode noise figure is 4.2 dB at 28 GHz. To evaluate the over-the-air performance, 16 H+16 V sub-array modules are implemented in this work. Each of the sub-array modules consists of four 4 H+4 V chips. Two subarray modules in this work are capable of scanning the beam from −50 • to +50 •. A saturated EIRP of 45.6 dBm is realized by 32 TX-mode beamformers. Within 1-m distance, a maximum SC-mode data rate of 15 Gb/s and the 5G new radio downlink packets transmission in 256-QAM could be supported by the module. A 2 × 2 DP-MIMO communication is also demonstrated with two 5G new radio 64-QAM uplink streams. Thanks to

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“…STPS, shown in Fig. 2(b), work by switching between different signal paths with a phase-difference between those paths [11], [29]- [32]. The increase of phase resolution in STPS is done by cascading many stages, leading to higher losses and an increase in area.…”

Section: B Ps Topologymentioning

confidence: 99%

A 14–50-GHz Phase Shifter With All-Pass Networks for 5G Mobile Applications

Anjos

Schreurs

Vandenbosch

et al. 2020

IEEE Trans. Microwave Theory Techn.

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In this work, an ultra-broadband phase-shifter (PS) with a 14-50 GHz bandwidth (defined by a phase-error below 1/2 LSB) is presented to address the multi-band requirements of 5G milimeter-wave (mm-wave) systems. The PS construction is based on all-pass networks (APNs), which have shown broad bandwidth capabilities in a lower frequency range. Aiming towards 5G mobile applications, the proposed 2-bit, 45 • phase resolution PS was implemented in 0.25 µm BiCMOS, manufactured and measured, achieving an insertion loss (IL) of 7.4 ± 0.26 dB at 28 GHz and 10 ± 0.22 dB at 39 GHz, with an RMS gain and phase error < 0.27 dB and < 4 • from 24-30 GHz, respectively, and < 0.33 dB and < 6 • from 37-43.5 GHz, demonstrating its capabilities to cover the 5G mm-wave spectrum. Index Terms-All-pass networks (APN), beamforming, broadband, milimeter-wave (mm-wave), multi-band, phase-array transceivers, switched-type phase-shifter (STPS), 5G.

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Low-Loss Highly Linear Integrated Passive Phase Shifters for 5G Front Ends on Bulk CMOS

Cited by 45 publications

References 16 publications

Variable-Phase All-Pass Network Synthesis and Its Application to a 14–54 GHz Multiband Continuous-Tune Phase Shifter in Silicon

Variable-Phase All-Pass Network Synthesis and Its Application to a 14–54 GHz Multiband Continuous-Tune Phase Shifter in Silicon

A 28-GHz CMOS Phased-Array Beamformer Utilizing Neutralized Bi-Directional Technique Supporting Dual-Polarized MIMO for 5G NR

A 14–50-GHz Phase Shifter With All-Pass Networks for 5G Mobile Applications

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