Antenna coupling and self-interference cancellation bandwidth in SAW-less diversity receivers

Montanari, D.; Silvestri, Lorenzo; Bozzi, Maurizio; Manstretta, Danilo

doi:10.1109/eumc.2016.7824447

Cited by 6 publications

(4 citation statements)

References 8 publications

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“…The RF SIC block taps the TX output signal and injects it at the LNA input to reduce the TX leakage signal power, and hence non-linear and reciprocal mixing effects of the RX. Antennaantenna coupling has a typical delay of 2-3 ns [14], which limits SIC bandwidth. Since SIC is optimized for the TX band, it is not effective in cancelling the receive-band TX noise.…”

Section: System Specifications a System Architecturementioning

confidence: 99%

“…18(c). Cancellation bandwidth for an antenna pair [planar inverted-F antenna (PIFA) from [14]], with a −25 dB coupling and 2.8 ns group delay is shown in Fig. 19(a).…”

Section: A Diversity Rx Performancementioning

confidence: 99%

“…Most mobile terminals are also equipped with a diversity antenna and use SAW filters in front of the diversity antenna receiver to attenuate blockers and TX leakage. In fact, given the limited antenna isolation (in the order 20-30 dB [14]), diversity receiver linearity and reciprocal mixing with the receiver local oscillator phase noise are major issues [15]- [21]. TX leakage cancellation techniques, where a vector modulator connected to the transmitter or an auxiliary transmitter [22]- [26] injects a replica TX signal at the receiver input, have been proposed to relax the receiver requirements.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

An FDD Wireless Diversity Receiver With Transmitter Leakage Cancellation in Transmit and Receive Bands

Montanari

Castellano

Kargaran

et al. 2018

IEEE J. Solid-State Circuits

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Antenna-coupling group delay limits the cancellation bandwidth of conventional self-interference cancellers (SICs), making it difficult to ensure isolation in both transmit (TX) and receive (RX) bands. Isolation over both bands is achieved in the dual-path receiver architecture proposed in this paper. The main path consists of a highly linear current-mode RX with a passive RF SIC. The auxiliary path implements a notch in the TX band followed by an adaptive digital equalizer whose output is used to suppress the TX noise leakage in the RX band. The main and auxiliary receiver prototypes, implemented in 28-nm CMOS technology, operate between 1 and 2 GHz, occupy an area of 0.51 and 0.12 mm 2 , and have a power dissipation of 32-40 and 26-64 mW, respectively. The stand-alone RX has a noise figure (NF) of 4-5 dB and an out-of-band IIP3 of 18 dBm. Turning on the passive canceller results in an effective IIP3 of 25-29 dBm and a degradation of the NF of less than 0.8 dB. Thanks to its high dynamic range, the auxiliary path suppresses the TX noise by >29 dB while degrading the RX NF by only 1 dB at 23-dBm TX output power.

show abstract

Section: System Specifications a System Architecturementioning

confidence: 99%

“…18(c). Cancellation bandwidth for an antenna pair [planar inverted-F antenna (PIFA) from [14]], with a −25 dB coupling and 2.8 ns group delay is shown in Fig. 19(a).…”

Section: A Diversity Rx Performancementioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

An FDD Wireless Diversity Receiver With Transmitter Leakage Cancellation in Transmit and Receive Bands

Montanari

Castellano

Kargaran

et al. 2018

IEEE J. Solid-State Circuits

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“…This paper describes an active SI cancellation technique for a SAW-less diversity receiver, extending the conference publication [23]. In this work, the design is extended including the down-conversion mixers and baseband trans-impedance amplifiers (TIAs).…”

Section: Introductionmentioning

confidence: 99%

A Low-Power Active Self-Interference Cancellation Technique for SAW-Less FDD and Full-Duplex Receivers

Tijani

Manstretta

2017

JLPEA

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An active self-interference (SI) cancellation technique for SAW-less receiver linearity improvement is proposed. The active canceler combines programmable gain and phase in a single stage and is co-designed with a highly-linear LNA, achieving low noise and low power. A cross-modulation mechanism of the SI canceler is identified and strongly suppressed thanks to the introduction of an internal resistive feedback, enabling high effective receiver IIP3. TX leakage of up to −4 dBm of power is suppressed by over 30 dB at the input of the LNA, with benefits for the entire receiver in terms of IIP3, IIP2, and reciprocal mixing. The design was done in a 40 nm CMOS technology. The system, including receiver and active SI canceler, consumes less than 25 mW of power. When the canceler is enabled, it has an NF of 3.9-4.6 dB between 1.7 and 2.4 GHz and an effective IIP3 greater than 35 dBm.

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A low power control system for real-time tuning of a hybrid transformer-based receiver

Castellano¹,

De²,

Strollo³

et al. 2016

2016 IEEE International Conference on Electronics, Circuits and Systems (ICECS)

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Antenna coupling and self-interference cancellation bandwidth in SAW-less diversity receivers

Cited by 6 publications

References 8 publications

An FDD Wireless Diversity Receiver With Transmitter Leakage Cancellation in Transmit and Receive Bands

An FDD Wireless Diversity Receiver With Transmitter Leakage Cancellation in Transmit and Receive Bands

A Low-Power Active Self-Interference Cancellation Technique for SAW-Less FDD and Full-Duplex Receivers

A low power control system for real-time tuning of a hybrid transformer-based receiver

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