Active CPW MMIC Circulator for the 40 GHZ Band

Kother, D.; Hopf, B.; Sporkmann, T.; Wolff, I.; Koblowski, S.

doi:10.1109/euma.1994.337266

Cited by 15 publications

(5 citation statements)

References 5 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…8 Since then, numerous approaches using different configurations of active components have been explored to achieve circulator functionality. [9][10][11][12] According to a study conducted in Reference 13, active circulators using Monolithic Microwave Integrated Circuits (MMIC) offer better solutions for integrated system-on-a-chip (SOC) applications. They offer the benefit of increased bandwidth and high-frequency operation at a similar level of insertion loss compared to conventional systems.…”

Section: Introductionmentioning

confidence: 99%

“…In 1965, the concept of using semiconductor devices to create active circulators was introduced, which marked a significant departure from traditional circulators that relied on bulk physical properties 8 . Since then, numerous approaches using different configurations of active components have been explored to achieve circulator functionality 9–12 …”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Active quasi circulator: Comprehensive review and performance comparison

Hasan,

Chowdhury,

Zaman

2024

Engineering Reports

View full text Add to dashboard Cite

Designing circulator as an antenna interface device becomes a daunting task, particularly active‐quasi circulator. This article focuses on demonstrating the basic operation principle, design methods, technical parameters, and performance metrics of active quasi‐circulator. In addition, the study provides an analogy of the circuits and structures proposed by the researchers to enhance certain performance metrics. Active signal cancellation and passive signal cancellation are identified as the major design approaches. Tunable, wideband, and wideband‐tunable are the major types of circulators found in existing literature. Moreover, this article provides a performance comparison of the active‐quasi circulators available in existing literature. Several active quasi‐circulators were able to operate in high frequencies such as 60 GHz with acceptable isolation levels. On the other hand, several designs have over 30 dB isolation, which is a highly desired parameter. At last, the future design challenges associated with active‐quasi circulators have been discussed to provide insight into future research.

show abstract

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Active quasi circulator: Comprehensive review and performance comparison

Hasan,

Chowdhury,

Zaman

2024

Engineering Reports

View full text Add to dashboard Cite

show abstract

“…Apart from full three‐way active circulators, quasicirculators were also the subject of interest for many due to its practical application for phase shifters and T/R modules [ 7–15]. Unlike a full three‐way active circulator, a quasicirculator does not permit full unidirectional microwave signal propagation for all the ports.…”

Section: Introductionmentioning

confidence: 99%

A modular approach to design a full three‐way 8 to 18 GHz MMIC active circulator

Lim

Ang

et al. 2012

Micro & Optical Tech Letters

View full text Add to dashboard Cite

A modular approach to design full three‐way active circulator is presented. Derived S‐parameters for the modular design approach illustrates that broadband performance can be achieved with broadband performance modules. A full three‐way 8 to 18 GHz MMIC active circulator was designed and fabricated with broadband feedback amplifiers and broadband 180° hybrids. © 2012 Wiley Periodicals, Inc. Microwave Opt Technol Lett 54:2858–2861, 2012; View this article online at wileyonlinelibrary.com. DOI 10.1002/mop.27202

show abstract

“…anti-clockwise direction. This directivity property of a circulator is represented in the s-parameters for an ideal circulator shown in Figure 6 Apart from full three way active circulators, quasi-circulators were also the subject of interest for many due to its practical use in phase shifters and T/R modules [104]- [112]. Different from the full three way circulators, quasi-circulators do not support the unidirectional microwave signal propagation for all the microwave ports.…”

Section: Active Circulatormentioning

confidence: 99%

Modeling in microelectronics at microwave/millimeter-wave frequencies and innovative circuit design

Lim¹

View full text Add to dashboard Cite

Monolithic microwave integrated circuits (MMICs) have become an important and integral part of our lives today. Modern day MMICs can be found in a wide range of applications ranging from commercial products such as the cellular communication systems to complex satellite systems and radar systems used in the defence industries. The advancement in the field of MMICs in terms of its performance and compactness in size is the result of the union between the understanding in microwave/millimeter-wave frequencies theories and microelectronics fabrication competencies. The active device which is the key component for MMICs has seen tremendous progress over the past fifty years not solely in terms of the frequency of operation but also the achievable output power density [1]. For example, indium phosphide (InP) based double heterojunction bipolar transistors had demonstrated a f max of greater than 800 GHz [2], silicon germanium (SiGe) and CMOS based RFICs working above 100 GHz [3], and AlGaN/GaN based power amplifiers operating in the W-band frequency spectrum [4],[5]. A GaN power amplifier design capable of achieving pulsed output power of greater than 400W with PAE greater than 40% across the frequency range from 2.9 GHz to 3.5 GHz was demonstrated [6]. GaN power amplifier capable of achieving pulse output power of 750W was also demonstrated but has a narrow bandwidth performance at 2.14GHz [7].As listed above, each material will have traits superior to others and selecting the appropriate material system to be used in circuit design will depend on the intended application. Certain materials such as InP and GaAs are more proficient in high frequency operation (beyond w-band operation) while material such as GaN display superiority when used in high power applications.

show abstract

Active CPW MMIC Circulator for the 40 GHZ Band

Cited by 15 publications

References 5 publications

Active quasi circulator: Comprehensive review and performance comparison

Active quasi circulator: Comprehensive review and performance comparison

A modular approach to design a full three‐way 8 to 18 GHz MMIC active circulator

Modeling in microelectronics at microwave/millimeter-wave frequencies and innovative circuit design

Contact Info

Product

Resources

About