Bandwidth Optimization Method for Reflective-Type Phase Shifters

Müller, D.; Haag, Alexander; Bhutani, Akanksha; Tessmann, A.; Leuther, A.; Zwick, Thomas; Kallfass, Ingmar

doi:10.1109/tmtt.2017.2779156

Cited by 12 publications

(3 citation statements)

References 22 publications

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“…3. The stub-loaded coupler exhibits lower phase imbalance than the branch-line coupler (below 2°) across the band of interest, which translates into a wider operating band for the RTPS [9].…”

Section: Comparative Designsmentioning

confidence: 99%

“…It has been determined recently, in theory, that the phase imbalance of the coupler used in the design of a RTPS has a dramatic influence on the fractional bandwidth (FBW) of the RTPS [9]. In that context, this work proposes the novel combination of the coupler previously developed in [8], which has a low phase imbalance across a large bandwidth, and the reflective load circuit in [2], to implement a compact and wideband X-band RTPS in single-layer RF PCB.…”

Section: Introductionmentioning

confidence: 99%

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<inline-formula> <tex-math notation="LaTeX">$X$ </tex-math> </inline-formula>-Band Reflection-Type Phase Shifters Using Coupled-Line Couplers on Single-Layer RF PCB

Venter

Stander

Ferrari

2018

IEEE Microw. Wireless Compon. Lett.

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In this paper, an X-band reflection-type phase shifter is presented. It is based on a single layer stub-loaded coupled line coupler loaded by two-varactor tuning circuits. This choice of coupler significantly improves on the phase shifter bandwidth achievable with a branch-line coupler, as it features lower phase imbalance across the band of interest. The proof-ofconcept prototype achieves better than 10-dB return loss across a 20 % fractional bandwidth. The phase shifter further exhibits insertion loss of 2.1 ± 1.3 dB and maximum phase shift of 392° at 10 GHz, leading to a state-of-the-art figure of merit at X-band of 115 °/dB. The occupied area is 0.25 λg 2 .

show abstract

Section: Comparative Designsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

<inline-formula> <tex-math notation="LaTeX">$X$ </tex-math> </inline-formula>-Band Reflection-Type Phase Shifters Using Coupled-Line Couplers on Single-Layer RF PCB

Venter

Stander

Ferrari

2018

IEEE Microw. Wireless Compon. Lett.

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“…Numerous remarkable studies have proposed terahertz amplitude and phase modulation techniques [12,13], including quasi-optical [14][15][16][17][18][19][20][21] and on-chip devices [22][23][24][25][26][27]. However, they still suffer from the following problems: first, they can only realize single modulation of amplitude and phase, which requires designing multiple devices if we want to manipulate amplitude and phase in frequency division multiplexing systems, increasing the design and processing costs.…”

Section: Introductionmentioning

confidence: 99%

Low terahertz frequency on-chip multi-functional modulator with amplitude and phase modulation

Liang,

Zeng,

Zhao

et al. 2023

J. Phys. D: Appl. Phys.

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Terahertz amplitude and phase modulation technologies are crucial for terahertz communication, radar, and imaging. However, most current approaches can only achieve either amplitude or phase modulation. In this paper, we present a low terahertz frequency on-chip multi-functional modulator that consists of a hybrid coupler and reflection meta-structure. High-performance amplitude modulation is achieved by combining series resonant absorption of series coupling branch (SCB) with resonance enhancement of parallel coupling branch (PCB) in the reflection meta-structure. Meanwhile, the enhanced resonance provides a larger range of phase shifts, enabling effective amplitude and phase modulation in two different frequency regions. Therefore, we realize an amplitude modulation in the range of 115-135 GHz with a minimum transmission loss of 4 dB and a modulation depth of over 10 dB. At the same time, we achieved a continuous phase shift in the 103-113 GHz region, as well as a 180-degree 2-bit phase shift in the 107-109 GHz range with only 5.7 dB transmission loss. Our simple method for terahertz amplitude and phase multi-functional modulation offers the potential to construe terahertz multifunctional integrated systems.

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A 28GHz RF Phase Shifter with High Phase Resolution in 180-nm CMOS Technology

2020

2020 IEEE Asia-Pacific Microwave Conference (APMC)

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Bandwidth Optimization Method for Reflective-Type Phase Shifters

Cited by 12 publications

References 22 publications

<inline-formula> <tex-math notation="LaTeX">$X$ </tex-math> </inline-formula>-Band Reflection-Type Phase Shifters Using Coupled-Line Couplers on Single-Layer RF PCB

<inline-formula> <tex-math notation="LaTeX">$X$ </tex-math> </inline-formula>-Band Reflection-Type Phase Shifters Using Coupled-Line Couplers on Single-Layer RF PCB

Low terahertz frequency on-chip multi-functional modulator with amplitude and phase modulation

A 28GHz RF Phase Shifter with High Phase Resolution in 180-nm CMOS Technology

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