A Compact Dual-Band Coupled-Line Balun With Tapped Open-Ended Stubs

Shao, Jinghai; Zhang, Hualiang; Chen, Chang; Tan, S.C.; Chen, Kevin J.

doi:10.2528/pierc11050205

Cited by 24 publications

(12 citation statements)

References 20 publications

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“…With the rapid advance in wireless communications, the designs of microwave circuits are facing new challenges including compact size [1-2], wide bandwidth [3][4][5] and multi-band [6][7][8][9][10][11][12][13][14] operations. For example, high data-rate wireless communication systems, such as worldwide interoperability for microwave access (W iMAX) and wireless local area network (W LAN), require wide bandwidth up to several hundred of megahertz and flexibility of operating in multiple frequency bands.…”

Section: Introductionmentioning

confidence: 99%

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Designs of dual band microwave components and their applications

et al. 2013

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This paper presents the designs and the applications of dual band microwave components. For the designs of microwave components, we introduced a dual band coupler, a dual band crossover and a dual band balun. Analytical equations are derived to design the proposed dual band components. To demonstrate the applications of proposed dual band devices, we present a dual band Butler matrix and a dual band RF sensor. Both of them have shown improved performance (e.g. robustness, and measurement stability).

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Section: Introductionmentioning

confidence: 99%

“…In section II, a dual band coupler [11], a dual band crossover [12], and a dual band balun [13] are introduced. The dual band coupler utilized a tapped stub ( T -shape) to realize a 90° phase difference at two frequencies.…”

Section: Introductionmentioning

confidence: 99%

Designs of dual band microwave components and their applications

et al. 2013

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“…Meanwhile, in today's engineering field, dual‐band technology has been well developed. Many novel dual‐band components have been investigated such as: dual‐band power divider [8–11], dual‐band balun [12], dual‐band rat‐race coupler [13], and dual‐band bandpass filter [14, 15]. Recently, the application of dual‐band technology has been further extended to the area of metamaterials, where dual‐band invisible cloak was designed [16].…”

Section: Introductionmentioning

confidence: 99%

Dual‐band microwave device for sensing dielectric property changes in microfluidic channels

Shao

Manandhar

Arigong

et al. 2012

Micro & Optical Tech Letters

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We propose a dual‐band microwave device to detect the dielectric changes in polydimethylsiloxane microfluidic channels. Such a device, which consists of two dual‐band Wilkinson power dividers (working at 2 and 5 GHz) and two 90° dual‐band microstrip lines (providing 180° phase difference at two operating frequencies), is very sensitive for identifying dielectric material changes. Moreover, by operating at two frequencies simultaneously, it can improve the measurement stability/robustness. Compared with other existing microwave microfluidic sensors, the proposed device features enhanced measurement stability with the same level of measurement sensitivity (up to −80 dB cancellation level). © 2012 Wiley Periodicals, Inc. Microwave Opt Technol Lett 54:2691–2694, 2012; View this article online at wileyonlinelibrary.com. DOI 10.1002/mop.27188

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“…In hybrid circuits passive baluns are commonly used [8][9][10][11], while in RFIC and MMIC designs both active baluns and passive baluns are widely implemented. For ICs work below 4 GHz, since the passive baluns are too bulky to realize on chip, usually active baluns are implemented [12][13][14].…”

Section: Introductionmentioning

confidence: 99%

Design and Integration of Compact K-Band Baluns Using Impedance Tuning Approach

Zhang¹,

Subramanian²

2012

PIER C

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Abstract-Compact K-Band CMOS baluns are designed, fabricated and characterized in a 130 nm CMOS technology. These baluns include a tunable active balun, a L-C lumped element balun, and two asymmetric planar transformer baluns. The detailed design processes are presented, including the topology selection, the transistor, inductor and transformer sizing, and the layout considerations. These topologies are compared in various aspects such as insertion loss, phase and amplitude imbalance, bandwidth, chip area, power consumption, and the difficulty to design and integration. An impedance tuning approach is implemented to chose the proper balun topology and to simply the balun integration. The baluns are on-wafer characterized and the measurement results compare the state-of-the-art realizations.

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A Compact Dual-Band Coupled-Line Balun With Tapped Open-Ended Stubs

Cited by 24 publications

References 20 publications

Designs of dual band microwave components and their applications

Designs of dual band microwave components and their applications

Dual‐band microwave device for sensing dielectric property changes in microfluidic channels

Design and Integration of Compact K-Band Baluns Using Impedance Tuning Approach

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