Wideband mm-Wave CMOS Slow Wave Coupler

Parveg, Dristy; Varonen, Mikko; Karaca, Denizhan; Halonen, K.

doi:10.1109/lmwc.2019.2892845

Cited by 19 publications

(9 citation statements)

References 7 publications

(8 reference statements)

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The 185-GHz coupler, even though better results may be expected from a 4-port characterization, presents a magnitude imbalance of 0.8 dB, which is of the same order of magnitude as the coupler reported in [19]. In addition, it presents an isolation and return loss also comparable to the other couplers.…”

Section: Comparison To the State-of-the-artmentioning

confidence: 54%

“…To put the obtained performance figures into perspective, we present a direct comparison between our experimental measurements and state-of-the-art designs in the literature. Table V summarizes this comparison. In [19] authors report a coupled-line coupler using the CS-CPW architecture at 90 GHz with the floating shield connected Fig. 16 Phase difference between the through port (i.e.…”

Section: Comparison To the State-of-the-artmentioning

confidence: 99%

See 1 more Smart Citation

Design of mm-Wave Slow-Wave-Coupled Coplanar Waveguides

Margalef‐Rovira

Lugo-Alvarez

Bautista³

et al. 2020

IEEE Trans. Microwave Theory Techn.

View full text Add to dashboard Cite

This paper focuses on the design of highperformance Coupled Slow-wave CoPlanar Waveguide (CS-CPW) in CMOS technologies for the mm-wave frequency bands. First, the theory as well as the electrical model of the CS-CPW are presented. Next, the analytical approach for the calculation of the model parameters is discussed. Then, by using the developed model, two millimeter-wave backward directional 3-dB couplers are designed in a Bipolar Complementary-Metal-Oxide-Semiconductor (BiCMOS) 55-nm technology for 120 and 185-GHz operation, respectively. Simulation and experimental results demonstrate that the use of the CS-CPW concept leads to state-ofthe-art performance, with a good agreement between the analytical model, electromagnetic simulations and measurement results.

show abstract

Section: Comparison To the State-of-the-artmentioning

confidence: 54%

Section: Comparison To the State-of-the-artmentioning

confidence: 99%

Design of mm-Wave Slow-Wave-Coupled Coplanar Waveguides

Margalef‐Rovira

Lugo-Alvarez

Bautista³

et al. 2020

IEEE Trans. Microwave Theory Techn.

View full text Add to dashboard Cite

show abstract

“…In this work, authors explored the performance and versatility of the structure, introducing a cut on the fingers giving the designer an extra degree of freedom. After that, several works have reported the use of CS-CPWs for the integration of different RF functions such as: phase shifting [14], impedance matching [15], Marchand balun design [16], and for coupler design [17].…”

Section: The 3-db Couplermentioning

confidence: 99%

mm-Wave Through-Load Switch for in-situ Vector Network Analyzer on a 55-nm BiCMOS Technology

Margalef‐Rovira

Saadi

Bourdel

et al. 2020

2020 18th IEEE International New Circuits and Systems Conference (NEWCAS)

View full text Add to dashboard Cite

In this paper, an innovative millimeter-wave (mmwave) through-load switch for in-situ reflectometers and on-wafer calibration is proposed. This two-port device can switch between two states: (i) a through connection or (ii) a 50 Ω load for both of its ports. The through-load switch is composed of a 3-dB directional coupler and two nMOS transistors controlled through a biasing voltage applied to their gate. Measurement results of a 120-GHz 3-dB directional coupler are provided up to 145 GHz together with EM simulations and circuit-level simulations up to 220 GHz of the through-load switch. A wide bandwidth is obtained, from 73 GHz to 179 GHz, with limited insertion loss of 2 dB.

show abstract

“…Such couplers can be realized in The associate editor coordinating the review of this manuscript and approving it for publication was Abhishek K. Jha . integrated circuits, where occupied area and insertion losses are critical [13], [14], or can be used to obtain a circuit with tunable center frequency and differential phase [15]. Broader bandwidths are obtained with the use of multisection coupled-line directional couplers realized as a cascade connection of quarter wavelength coupled-line sections with different coupling coefficients or tapered-line couplers in which coupling coefficient changes smoothly from the maximum value to zero [16]- [24].…”

Section: Introductionmentioning

confidence: 99%

Broadband Equal-Split Directional Couplers Composed of Cascade- and Tandem-Connected Coupled-Line Sections Having Unequal Lengths

et al. 2021

View full text Add to dashboard Cite

A new concept of broadband equal-split coupled-line directional couplers is proposed. The proposed couplers are based on coupled-line sections, all having the same coupling coefficient, and feature frequency characteristics similar to the ones obtained for classic symmetrical three-section coupled-line couplers. It is shown that appropriate cascade-and tandem-connected coupled-line sections, having all the same coupling coefficients and different electrical lengths allow for achieving equal power split in a broadband frequency range together with the quadrature differential phase response. Therefore, a very flexible design process is possible, in which directional couplers with different bandwidths and coupling imbalances can be realized by changing solely the electrical lengths of the coupled-line sections. Moreover, the proposed networks require significantly lower coupling coefficients and feature slightly shorter overall electrical lengths than their classic counterparts. The theoretical analysis of the proposed circuits is shown in the paper and is followed by the design and measurements of two broadband equal-split quadrature directional couplers operating at the center frequency of 2 GHz.

show abstract

Wideband mm-Wave CMOS Slow Wave Coupler

Cited by 19 publications

References 7 publications

Design of mm-Wave Slow-Wave-Coupled Coplanar Waveguides

Design of mm-Wave Slow-Wave-Coupled Coplanar Waveguides

mm-Wave Through-Load Switch for in-situ Vector Network Analyzer on a 55-nm BiCMOS Technology

Broadband Equal-Split Directional Couplers Composed of Cascade- and Tandem-Connected Coupled-Line Sections Having Unequal Lengths

Contact Info

Product

Resources

About