Non-Magnetic Non-Reciprocal Microwave Components — State of the Art and Future Directions

Nagulu, Aravind; Krishnaswamy, Harish

doi:10.1109/jmw.2020.3034301

Cited by 16 publications

(3 citation statements)

References 88 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…While there have been several non-IC-based circulator implementations [83]- [89], in this paper we focus specifically on recent IC-based circulator implementations. For a more comprehensive overview on different (both integrated and non-integrated) circulator implementations, we refer the reader to [90].…”

Section: B Integrated Circulatorsmentioning

confidence: 99%

“…To provide a comprehensive and fair comparison between the shared antenna interfaces, we discuss two figures of merit (FOM): (i) antenna interface efficiency, denoted by η ANT , which evaluates the degradation in the power-amplifier efficiency due to the presence of the antenna interface by taking into account its TX power handling, TX-ANT insertion loss, RX noise figure (NF) degradation, and DC power consumption [90], [98], and (ii) isolation-fractional bandwidth product, where the fractional bandwidth (FBW) is the ratio of the bandwidth of isolation and the center frequency.…”

Section: Comparison and Figure Of Merit (Fom)mentioning

confidence: 99%

“…However, typical distributed PA architectures have reduced PA efficiency while the antenna interface efficiency can remain high. Ferrite circulators can have very high antenna interface efficiencies of 60-90% [90] due to their extremely low insertion losses. For example, [99] is a commercial off the shelf ferrite circulator having >83% efficiency.…”

Section: ) Antenna Interface Efficiencymentioning

confidence: 99%

See 2 more Smart Citations

A Survey and Quantitative Evaluation of Integrated Circuit-Based Antenna Interfaces and Self-Interference Cancellers for Full-Duplex

Chen

Garikapati

Nagulu

et al. 2021

IEEE Open J. Commun. Soc.

Self Cite

View full text Add to dashboard Cite

Full-duplex (FD) wireless -simultaneous transmission and reception on the same frequency -is a promising technique that can significantly improve spectrum efficiency and reduce communication latency in future wireless networks. To enable FD operation, the powerful self-interference (SI) signal leaking from the transmitter (TX) into the receiver (RX) needs to be suppressed and canceled to an extreme degree at the antenna interface as well as in the RF/analog and digital domains. Various approaches to achieve TX-RX isolation at the antenna interface and SI cancellation (SIC) in the RF/analog and digital domains have been demonstrated, with a focus on using bench-top off-the-shelf components. Recent advances in integrated circuit (IC) implementations of various types of shared antenna interfaces and cancellers in the RF and/or analog baseband (BB) domains have further pushed the frontier of realizing FD wireless in small-form-factor/hand-held devices. Moreover, it is still important to fundamentally study the SIC performance that can be achieved by different types of cancellers. In this paper, we present a first-of-its-kind comprehensive overview on the implementation and comparison of various state-of-theart integrated shared antenna interfaces and SI cancellers in both the RF and analog BB domains. We define two figures of merit (FOM) for the IC-based shared antenna interfaces and SI cancellers, which capture various design considerations and performance tradeoffs including the achievable isolation/SIC, bandwidth, noise figure degradation, TX/SI power handling, and power consumption. In particular, we focus on two types of integrated shared antenna interfaces including electrical-balance duplexers and circulators. We also discuss two types of SI cancellers based on the time-domain and frequency-domain approaches, which respectively employ parallel delay lines and bandpass filters to emulate the SI channel. Based on realistic measurements, we perform extensive numerical evaluations to illustrate and compare the achievable RF SIC performance in different scenarios, as well as discuss various design tradeoffs. Finally, we provide an overview of the IC-based implementations and performance evaluations of both types of cancellers based on our recent work. INDEX TERMS Full-duplex wireless, integrated circuit (IC), antenna interface, self-interference cancellation, systems and testbeds. TINGJUN CHEN (Member, IEEE) received the B.Eng. degree in electronic engineering from Tsinghua University in 2014, and the Ph.D. degree in electrical engineering from Columbia University in 2020. He is an Assistant Professor with the Department of Electrical and Computer Engineering, Duke University and was a Postdoctoral Associate with Yale University from 2020 to 2021. His research interests are in the area of networking and communications with a specific focus on next-generation wireless networks and Internet-of-Things systems.

show abstract

Section: B Integrated Circulatorsmentioning

confidence: 99%

Section: Comparison and Figure Of Merit (Fom)mentioning

confidence: 99%

Section: ) Antenna Interface Efficiencymentioning

confidence: 99%

See 1 more Smart Citation