mm-wave telecommunication & big-data processing solutions...

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Mm-wave telecommunication & big-data processing solutions

Technology overview

06 June 2017

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How do we contribute

To create small and cheap mm-wave

telecommunication and data processing solutions

in CMOS and BiCMOS technology nodes.

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Miniaturization and full monolithic integration of

ultra high bandwidth wireless transceivers in

commercial silicon technologies:

Developing communications grade tunable mm-wave (Ka – W band) on-chip bandpass filters.1Developing ASP/DSP to process the high bandwidth signals (5 GHz for 5G).

Developing communications grade amplifiers such as LNAs and PAs.

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4 Developing other front-end components such as oscillators, mixers, phase shifters and antenna.

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Silicon basedSince our systems are silicon

based they are cheaper,

offer full analogue/digital

integration and have a large

manufacturing capacity

worldwide.

Skilled teamOur expertise and skilled

team in bleeding-edge mm-

wave telecommunication IC

sub-systems gives us the

rare ability to design other

such systems to stringent

customer requirements as

necessitated for future

wireless mm-wave systems.

Intellectual propertyMultifractal Semiconductors

will commercialize this

technology portfolio by

licencing it to integrated

device manufacturers (IDMs)

and fabless semiconductor

companies.

Multifractal has developed novel on-chip bandpass filters and digital signal processing (DSP) blocks as necessitated by future 5G technologies.

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High Q-factors

Offer a 100X increase in unloaded Q factors over existing solutions, which for the first time make a monolithic integrated circuit approach viable.

Post-production tunable

Are post-production tunable and cover the L –X and Ka – W bands.

Risk free licensing with support

Silicon proven functionality and technical support during integration reduces

production risk for customers.

Small size

The filters are smaller than 1 mm2 and thus cheap to mass manufacture as they occupy

very little chip real estate.

The bandpass filters

proposed by Multifractal:

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High speed

Boast multi-gigahertz bandwidths (speeds 30X higher (5000X under certain conditions) than SOTA).

Paradigm shift

Rely on an analogue internal mode of operation (paradigm shift – big data problem).

Low power

Boast power consumptions 40x lower to existing SOTA DSPs.

Small size

The ASPs are smaller than 4 mm2 and thus cheap to mass manufacture as they occupy

very little chip real estate.

The first ever, specialised

set of (A)DSPs have been

developed by Multifractal,

which:

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Mm-wave telecommunication & big data

processing solutions.

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Large bandwidths (800 MHz – 350 nm CMOS).

High accuracy (feedback mechanism) – voltage and current following to within 0.5 %.

Stability of the feedback loop (post-production tunable phase margin).

Post-production peaking control (reduce ripple) to account for process tolerances.

1. High-precision CMOS CCII with stability and peaking control

Figure 1. CCII+ – measurement setup. Figure 2. CCII+ – micrograph.

A CCII is a versatile analogue building block.

Prototyped and measured.

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A second-order all-pass network is the fundamental building block of any analogue signal processor (ASP).

Traditionally bulky soft-substrate passive microstrip solutions are used.

First-ever active on-chip second-order all-pass network.

Low insertion loss ripple ( < 1 dB),occupies 0.0625 mm2 real-estate,frequency agile in all two degrees of freedom, reduced sensitivity to process tolerances, based on the CCII.

2. Tunable active second-order all-pass network (CMOS)

Figure 5. Second-order all-pass network – micrograph.

100 microns

Prototyped and measured.

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A CCII is a versatile analogue building block capable of achieving large bandwidths.

Mm-wave bandwidths (27 GHz) –first time ever.

Feedback mechanism to improve precision (to within 1 %).

Peaking reduction (reduce passband ripple).

3. Mm-wave bandwidth CCII with peaking reduction (BiCMOS)

Figure 8. First-ever mm-wave bandwidth CCII.

150 microns

Prototyped, measurements pending.

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A second-order all-pass network is the fundamental building block of any analogue signal processor (ASP).

Mm-wave bandwidths (50 GHz).

Peak-to-peak group delay of 43 ps.

Average output noise of 0.69 nV/√Hz.

4. Mm-wave active second-order all-pass network (BiCMOS)

Figure 9. Mm-wave bandwidth CCII – simulated results.150 microns

42.6 ps

0 30.6 GHzf

38 ps

2.136 dB

1.5 dB

Prototyped, measurements pending.

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Analogue signal processing (ASP) is a promising alternative to digital signal processing (DSP) techniques in future high-speed telecommunication and data-processing solutions, since analogue devices outperform their digital counterparts in terms of cost, power consumption and the maximum attainable bandwidth.

5. Our (D)ASPs with 5 GHz bandwidth

Figure 10. Real-time Fourier transformation system.

200 microns

The fundamental building block of any ASP is a dispersive delay structure (DDS) of prescribed response. Any dispersive response can, in turn, be synthesized with first- and second-order all-pass networks. For instance, linear group delays are used for real-time Fourier transformation, stepped group delays for distortionless frequency discrimination, Chebyshev delays for distortion-encoding multiple-access communication channels, etc. Furthermore, electronic building blocks such as antennas, filters and amplifiers often have a frequency dependent dispersion profile which can be compensated (to minimize signal distortion) using all-pass networks rather than DSPs.

R&D is ongoing

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SOTA Q0 of ≈10, Our Q0 of ≈1000.

SiGe BiCMOS processes.

E-band (71-76 and 81-86 GHz.

Centre frequency and Q-factor tunable with control voltages.

6. Fully tunable, active, enhanced, high Q-factor mm-wave resonators

Figure 11. Simulation results of the tunable, high-Q mm-wave resonators.

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Fractional bandwidths of 0.5%.

Filters as narrow as 500 MHz.

Applicable to E-Band 71-76 and 81-86 GHz.

Resonator Q0 enhanced from 10 to 1000.

7. Narrowband coupled resonator bandpass filters

Figure 12. Simulation results of the tunable, high-Q mm-wave resonators.

300 microns

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An LNA is a key component of any transceiver.

56-92 GHz operating range.

8. Mm-wave LNA

Figure 13. Mm-wave LNA.

15 GHz bandwidth.

Gain of > 13 dB.

NF < 8 dB.

150 microns

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We look forward to forming a partnership

Pretoria, South Africa

Nish: [email protected]: [email protected]

Nish: +27 723452957

Address

Contact Info

Telephone

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