A Modified Marchand Balun Configuration With Tunable Phase Balance

Michaelsen, Rasmus S.; Johansen, Tom K.; Tamborg, Kjeld M.; Zhurbenko, Vitaliy

doi:10.1109/lmwc.2013.2238913

Cited by 20 publications

(12 citation statements)

References 7 publications

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“…When this occurs, then S CLIN is ideally expressed by (3). Within the assumptions of the procedure described so far, B P4 can only degrade the balun's performance [3] as (7) shows. However, perfect match at each port may not be achieved and other discrepancies from the ideal matrix (3) may take place.…”

Section: Discussionmentioning

confidence: 99%

“…Among the possible approaches [1], Marchand baluns [2] have been demonstrated to achieve very good performance at mm-wave frequencies in integrated form [3]- [5] despite the considerable Silicon substrate loss.…”

Section: Introductionmentioning

confidence: 99%

“…However, it also presents an opportunity to make the balun tunable by setting the AC ground at the frequency of interest. Recent work [3] opted for adding a susceptive element between the coupled lines and ground with interesting results. Instead, this paper will provide a detailed analysis on how to exploit port P4 to make a Marchand balun tunable and will present measurements to validate the analysis.…”

Section: Introductionmentioning

confidence: 99%

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Analysis of tunable Marchand baluns

Boglione

Goodman

2014

2014 IEEE Radio Frequency Integrated Circuits Symposium

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-The paper tackles the issue of designing tunable Marchand baluns and provides an insight on available approaches for integrating the structure in a semiconductor process. Limitation of the approach and possible solutions are also discussed. The analysis is applied to a Marchand balun fabricated in IBM 8HP SiGe process to demonstrate the feasibility of the approach. A mix of measured and simulated data is used to support the analysis at Q band. State-of-theart performance is achieved.

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Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Analysis of tunable Marchand baluns

Boglione

Goodman

2014

2014 IEEE Radio Frequency Integrated Circuits Symposium

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“…The Marchand type balun has found widespread application, due to its wide bandwidth. Several modifications and enhancements has been reported, among these are techniques for bandwidth enhancement [2], miniturization [3], tuning of phase balance [4] or center frequency [5] and impedance scaling [6]. The impedance scaling is only suggested between real valued generator and load impedances.…”

Section: Introductionmentioning

confidence: 99%

Analysis and design of complex impedance transforming marchand baluns

Michaelsen

Johansen

Tamborg³

2014

2014 20th International Conference on Microwaves, Radar and Wireless Communications (MIKON)

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Abstract-A new type of Marchand balun is presented in this paper, which has the property of complex impedance transformation. To allow the Marchand balun to transform between arbitrary complex impedances, three reactances should be added to the circuit. A detailed analysis of the circuit gives the governing equations. To verify the theory, a design and electromagnetic simulation of a lumped element Marchand balun is made in a SiGe BiCMOS technology. The lumped element impementation is favorable because capacitors are placed where the additional reactances should be added. Thus it is possible to absorb a positive reactance by reducing a capacitor. At the design frequency of 10.5 GHz it matches 50Ω to 50 − j66Ω. It has an insertion loss of 5.1 dB, an input reflection of -20.8 dB, as well as phase and magnitude imbalance better than 0.2• and 0.12 dB, respectively.

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“…Following the procedure explained in [140], it is possible to prove that the power division ratio (PDR) between two output ports has the following relation with design parameters:…”

Section: Configuration and Analysismentioning

confidence: 99%

Multi-functional and Tunable Microwave Devices and Sub-systems for Wideband Applications

Zhu¹

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Microwave components and sub-systems have been widely investigated in recent years since they play essential roles in microwave systems. With the rapid development and explosive extension of microwave techniques, high speed, large data volume, and electromagnetic compatibility are not the only issues that concern designers, practitioners, and researchers. Features like multi-functionality, reconfigurability, portability, low energy consumption, miniaturization of circuit size and simple construction have come into focus more and more in recent years. Currently, microwave devices are suffering from several drawbacks: huge losses from a lack of integration of individual components, lack of new functionality, poor adaptability to different environments, low efficiency, flexibility and controllability, high cost and energy consumption, and insufficient miniaturization of circuit size.With these existing challenges and the huge call for innovation in microwave components and subsystems, new design approaches and structures are extremely in demand and a high point of focus.This thesis aims to solve some of the current challenges mentioned above by making four main contributions.The first contribution is the development of new design approaches to design microwave devices with multiple functions to replace cascaded devices with a single function. The main target is to reduce the overall number of components used in constructing microwave systems. With a large number of cascaded devices, huge losses will be produced which decrease systems" reliability and overall performance, not to mention the current large circuit volumes, high cost, and energy consumption. Multi-functional componentry is a suitable and proper solution to solve these problems. In wireless microwave systems, power dividers are usually cascaded with bandpass filters, to get rid of unwanted signals and transmit the desired ones. When the number of output terminations is raised, more filters are required, which makes it more difficult for design and implementation. A four-way power divider integrated with filtering characteristics is proposed to replace the cascaded structures. The proposed design shows equal power division, great selection of filtering signals and reduction in device numbers and overall cost.The second contribution is the development of multiple tunable microwave devices which can be controlled and adapted to different environments. An electrical tuning method is used by loading varactors on microstrip lines. To begin with, tunable bandpass filters were investigated to achieve high tunability of both centre frequency and bandwidth. To that end, several new designs with varactor-loaded coupled-line sections were proposed and verified. Relocatable transmission zero was realised to control the cut-off of the passband at two edges. The concept was applied in the II design of a tunable balanced bandpass filter with a wide tuning range and high common-mode suppression. Wideband power dividers with tunable power division at output termi...

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A Modified Marchand Balun Configuration With Tunable Phase Balance

Cited by 20 publications

References 7 publications

Analysis of tunable Marchand baluns

Analysis of tunable Marchand baluns

Analysis and design of complex impedance transforming marchand baluns

Multi-functional and Tunable Microwave Devices and Sub-systems for Wideband Applications

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