RC sequence asymmetric polyphase networks for RF integrated transceivers

Galal, Shereen M.; Ragaie, H.F.; Tawfik, Mohamed

doi:10.1109/82.818891

Cited by 83 publications

(29 citation statements)

References 11 publications

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“…Such filters are symmetric (structurally) and can be cascaded to improve IRR over a wider bandwidth. However, cascading a large number of stages can introduce significant loss in the signal path, requiring additional amplification stages [22]. A two-stage filter is used in the present implementation.…”

Section: Polyphase Filtersmentioning

confidence: 99%

A 6–20 GHz Adaptive SiGe Image Reject Mixer for a Self-Healing Receiver

Saha

Howard

Shankar

et al. 2012

IEEE J. Solid-State Circuits

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A wideband (6-20 GHz) Silicon-Germanium (SiGe) adaptive image-reject mixer with an intermediate frequency (IF) of 1.8 GHz is presented. The mixer can be "self-healed" to deliver consistent performance by nullifying the effects of process variations, environmental changes, or aging. Various performance metrics of the mixer can also be adapted to different specifications across multiple frequency bands. A conversion gain greater than 15 dB, an image rejection ratio (IRR) exceeding 35 dB, and an output 1-dB compression point greater than 10 dBm, were obtained in measurement. An automated self-healing procedure is developed and shown to be effective for improving the measured performance of the mixer. The mixer was fabricated in a 150 GHz peak , 200 nm SiGe BiCMOS process technology and consumes 215 mA of current operating off a 4 V rail.

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Section: Polyphase Filtersmentioning

confidence: 99%

A 6–20 GHz Adaptive SiGe Image Reject Mixer for a Self-Healing Receiver

Saha

Howard

Shankar

et al. 2012

IEEE J. Solid-State Circuits

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“…This method, however, is limited by the low quality factor of the tunable capacitors used, thus, increasing loss and reducing bandwidth, which is especially critical at millimeter-wave frequencies. The second possible method is the use of multistage networks [22], where each stage has a different resonance frequency. This method also is less sensitive to process variations relative to a single-stage network.…”

Section: Wideband Multistage Polyphase Networkmentioning

confidence: 99%

A 70–90-GHz High-Linearity Multi-Band Quadrature Receiver in ${\hbox{0.35-}}\mu{\hbox {m}}$ SiGe Technology

Nasr

Laemmle

Aufinger

et al. 2013

IEEE Trans. Microwave Theory Techn.

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An integrated frequency agile quadrature -band receiver is presented in this paper. The complete receiver is realized in a commercial m SiGe:C technology with an of 170/250 GHz. The receiver covers the two point-to-point communication bands from 71 to 76 GHz and from 81 to 86 GHz and the automotive radar band at 77 GHz. A wide tuning range modified Colpitts oscillator provides a local oscillator (LO) tuning range 30 . A two-stage constant phase RC polyphase network is implemented to provide wideband in-phase quadrature LO signals. The measured phase imbalance of the network stays below 8 over the receiver's frequency range. In addition the chip includes a wideband low-noise amplifier, Wilkinson power divider, down conversion mixers, and frequency prescaler. Each of the chip's receiver I/Q paths shows a measured conversion gain above 19 dB and an input referred 1-dB compression point of 22 dBm. The receiver's measured noise figure stays below 11 dB over the complete frequency range. Furthermore, the receiver has a measured IF bandwidth of 6 GHz. The complete chip including prescaler draws a current of 230 mA from a 3.3-V supply, and consumes a chip area of 1628 m 1528 m.Index Terms--band, low-noise amplifier (LNA), polyphase, quadrature generation, voltage-controlled oscillator (VCO), wideband receiver.

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“…The PPF features constant 90 o phase offset over frequency while gain during signal adding is equal only at ω 1 . Two poles were chosen to cover the complete bandwidth with low quadrature mismatch, [8]. Fig.…”

Section: B Quadrature Summingmentioning

confidence: 99%

Building a circle with squares: A polar phase shifter based on cartesian methods

Erkens

Zhang

Wunderlich

2009

2009 Ph.D. Research in Microelectronics and Electronics

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A phase shifter with polar output has been implemented with techniques commonly used for quadrature phase shifters. The hybrid approach employs dual-path programmable gain amplifiers and polyphase filters as cascaded quadrature phase shifter stages. Each stage is implemented using active components as well as differential RC filters which consume less area than the typical LC low-pass/high-pass approach. 5-bit phase resolution has been implemented. A 4-bit linear PGA follows the phase shifter chain for antenna tapering.The RFIC employing LNA and balancing devices has been been designed in a 0.25 μm SiGe BiCMOS technology which guarantees a low cost solution for medium scale integration such as in phased arrays. According to simulation results, a very homogeneous distribution of phase/gain states can be expected over a wide bandwidth. Achieved gain and noise figure in the band of interest (2.9 GHz ... 3.1 GHz) exhibit 25.9 dB and 11.6 dB, respectively, with a power consumption of 114 mW.

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RC sequence asymmetric polyphase networks for RF integrated transceivers

Cited by 83 publications

References 11 publications

A 6–20 GHz Adaptive SiGe Image Reject Mixer for a Self-Healing Receiver

A 6–20 GHz Adaptive SiGe Image Reject Mixer for a Self-Healing Receiver

A 70–90-GHz High-Linearity Multi-Band Quadrature Receiver in ${\hbox{0.35-}}\mu{\hbox {m}}$ SiGe Technology

Building a circle with squares: A polar phase shifter based on cartesian methods

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