Stubbed Branch Line Balun

Park, Myun‐Joo; Lee, Byungje

doi:10.1109/lmwc.2006.890445

Cited by 39 publications

(42 citation statements)

References 1 publication

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“…It is similar to a branch-line coupler with the fourth port open-circuited, forming the three-port balun. This balun can be analyzed using the even-odd mode method [9], [10]. Fig.…”

Section: Theoretical Analysis Of the Proposed Dual-band Balunmentioning

confidence: 99%

A Tapped Stepped-Impedance Balun With Dual-Band Operations

Zhang

Peng

Xin

2008

Antennas Wirel. Propag. Lett.

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This letter presents the design of a dual-band balun using tapped stubs and stepped-impedance structures. By adjusting the impedances of the tapped stubs properly, the two output signals of the balun are out-of-phase at the two operating frequencies which is essential for the balun operation. Meanwhile, the stepped-impedance structure is designed to satisfy the dual-band matching condition at the input port. Closed form design equations are derived using the even-odd mode method. Based on these equations, a microstrip balun on Rogers' duroid/RT 5880 substrate operating at 2.45 GHz/5.25 GHz is designed, fabricated, and measured. The measurement results verify the dual-band operations of the balun. Finally, the impedance transformation property of the proposed dual-band balun is discussed.

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“…It is similar to a branch-line coupler with the fourth port open-circuited, forming the three-port balun. This balun can be analyzed using the even-odd mode method [9], [10]. Fig.…”

Section: Theoretical Analysis Of the Proposed Dual-band Balunmentioning

confidence: 99%

A Tapped Stepped-Impedance Balun With Dual-Band Operations

Zhang

Peng

Xin

2008

Antennas Wirel. Propag. Lett.

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“…Compared with conventional single-ended circuits, balanced circuits can easily meet and even exceed requirements. Balunselectrical devices that convert between a balanced and unbalanced signal and thereby enable the transition from unbalanced circuits to balanced ones -are used as interface devices [1][2][3]. Baluns can take many forms and may include devices that transform impedances.…”

Section: Introductionmentioning

confidence: 99%

Using Open Stubs and Tuning the Width of Output Microstrip Lines of a Balun Diplexer to Obtain the Matching Output Impendence With Rf Output Transceiver

Peng¹,

Chen²,

Zhang³

et al. 2017

PIER C

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Abstract-Two novel compact 2.6/5.2 GHz diplexers with high common-mode suppression are designed and fabricated on an FR4 substrate. The diplexers are based on two open-loop rectangle-ring (OLRR) resonators, and two different resonant frequencies are easily obtained by tuning the lengths of the OLRR resonators. In the past, the traditional balun diplexer needed a matching circuit to achieve low loss when transferring a signal to a radio frequency (RF) transceiver, because of unmatched impedances between them. To improve efficiency and lower the cost of circuit fabrication, we propose a novel method for tuning the output impedance of the balun diplexer so that it matches that of the RF transceiver. The resulting balun diplexer has two stub-loaded microstrip lines; the required output impedance can be tuned by changing the widths of the microstrip lines and stubs and adjusting the stubs' length and position. If the output impedance is well tuned, this balun diplexer is more efficient and less costly because a matching circuit is unnecessary.

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“…They perform an important function in balanced circuit topologies such as balanced mixers, push pull amplifiers, antenna feeding network, and so on. In the past, various balun structures have been investigated for applications in microwave circuits [1][2][3]. Most of them can be easily realized using microstrip lines, but are not suited for very high frequency use due to significant and undesirable parasitic effects caused by junction discontinuities.…”

Section: Introductionmentioning

confidence: 99%

Multi-Function Patch Element

Zheng¹,

Chan²,

Man³

2010

PIER

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Abstract-Integration of multiple functions is for the first time achieved within a single patch circuit element. Firstly, out of phase equal power division and bandpass filter characteristics are combined within a patch element. The novelty of the proposed structure is to use simple asymmetric cross slots in the patch element to achieve this integration. A simplified equivalent circuit model to describe operation of this patch element is proposed. Coplanar waveguide/microstrip broadside coupling is then investigated to enhance the performance of the patch balun filter and eliminate narrow coupling gaps and microstrip lines. Subsequently, transition between microstrip and coplanar waveguide is then added to the patch element by using certain electromagnetic coupling methods for higher level integration without introducing additional loss. Different patch elements operating at 2.4 GHz are developed to validate the feasibility of the proposed structures. The circuits were designed, fabricated and measured. The measured results agree quite well with the simulation, exhibiting small amplitude and phase imbalance at the output ports throughout the desired passband, and good rejection levels elsewhere.

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Stubbed Branch Line Balun

Cited by 39 publications

References 1 publication

A Tapped Stepped-Impedance Balun With Dual-Band Operations

A Tapped Stepped-Impedance Balun With Dual-Band Operations

Using Open Stubs and Tuning the Width of Output Microstrip Lines of a Balun Diplexer to Obtain the Matching Output Impendence With Rf Output Transceiver

Multi-Function Patch Element

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