Ka-Band Marchand Balun with Edge- and Broadside-Coupled Hybrid Configuration

Yan, Jun; Liu, Hang; Zhu, Xi; Men, Kai; Yeo, Kiat Seng

doi:10.3390/electronics9071116

Cited by 5 publications

(4 citation statements)

References 15 publications

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“…The final stage 6 for a 180° shift is designed in the form of a Marchand balun [ 16 ] followed by a single-pole double-throw (SPDT) switch. It steers the signal into either the inverting (180°) or non-inverting (0°) path, producing the 180° phase shift.…”

Section: Circuit Designmentioning

confidence: 99%

“…Its four ports are P1, P2, P3, and P4, in which P1 is the input port, P2 is open-ended, P3 is the non-inverting output port, and P4 is the inverting output port. The SPDT switch comprising M6nb,6ns and M6ib,6is turns The final stage 6 for a 180 • shift is designed in the form of a Marchand balun [16] followed by a single-pole double-throw (SPDT) switch. It steers the signal into either the inverting (180 • ) or non-inverting (0 • ) path, producing the 180 • phase shift.…”

Section: Circuit Designmentioning

confidence: 99%

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A 28 GHz GaN 6-Bit Phase Shifter MMIC with Continuous Tuning Calibration Technique

Seo,

Lee,

Lee

et al. 2024

Sensors

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A 28 GHz digitally controlled 6-bit phase shifter with a precision calibration technique in GaN high-electron mobility transistor (HEMT) technology is presented for Ka-band phased-array systems and applications. It comprises six stages, in which stages 1 and 2 for 5.625° and 11.25° are designed in the form of a switched-line circuit, and stages 3, 4, and 5 for 22.5°, 45°, and 90° are designed in the form of a switched-filter circuit. The final stage 6 for 180° is designed in a single-to-differential balun followed by a single-pole double-throw (SPDT) switch for achieving an efficient phase inversion. A novel continuous tuning calibration technique is proposed to improve the phase accuracy. It controls the gate bias voltage of off-state HEMTs at the stage 6 SPDT switch for fine calibration of the output phase. Fabricated in a 0.15 μm GaN HEMT process using a die size of 1.75 mm2, the circuit produces 64 phase states at 28 GHz with a 5.625° step. The experimental results show that the Root-Mean-Square (RMS) phase error is significantly improved from 8.56° before calibration to 1.08° after calibration. It is also found that the calibration does not induce significant changes for other performances such as the insertion loss, RMS amplitude error, and input-referred P1dB. This work successfully demonstrates that the GaN technology can be applied to millimeter-wave high-power phased-array transceiver systems.

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Section: Circuit Designmentioning

confidence: 99%

Section: Circuit Designmentioning

confidence: 99%

A 28 GHz GaN 6-Bit Phase Shifter MMIC with Continuous Tuning Calibration Technique

Seo,

Lee,

Lee

et al. 2024

Sensors

View full text Add to dashboard Cite

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“…A passive balun for the K band (18.4-32.2 GHz) composed of a pair of coupled spiral inductors has dimension of only 410 µm × 180 µm [10]. A passive balun can be implemented as a transformer [8,11,14,20,25] or as coupled transmission lines [11,18,26,27]. Balun circuit solutions using coupled transmission lines are solutions with very wide bandwidths.…”

Section: Introductionmentioning

confidence: 99%

“…Balun circuit solutions using coupled transmission lines are solutions with very wide bandwidths. The bands of the coupled transmission-line baluns presented in previous articles [18,26,27] are as follows: 50-67 GHz (bandwidth of 17 GHz), 29-46 GHz (bandwidth of 17 GHz) and 88-224 GHz (bandwidth of 136 GHz).…”

Section: Introductionmentioning

confidence: 99%

Active Balun with Center-Tapped Inductor and Double-Balanced Gilbert Mixer for GNSS Applications

2021

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A new 1.575 GHz active balun with a classic double-balanced Gilbert mixer for global navigation satellite systems is proposed herein. A simple, low-noise amplifier architecture is used with a center-tapped inductor to generate a differential signal equal in amplitude and shifted in phase by 180°. The main advantage of the proposed circuit is that the phase shift between the outputs is always equal to 180°, with an accuracy of ±5°, and the gain difference between the balun outputs does not change by more than 1.5 dB. This phase shift and gain difference between the outputs are also preserved for all process corners, as well as temperature and voltage supply variations. In the balun design, a band calibration system based on a switchable capacitor bank is proposed. The balun and mixer were designed with a 110 nm CMOS process, consuming only a 2.24 mA current from a 1.5 V supply. The measured noise figure and conversion gain of the balun and mixer were, respectively, NF = 7.7 dB and GC = 25.8 dB in the band of interest.

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