A compact Gysel power divider with ultra‐wide rejection band and high fractional bandwidth

A compact, broadband three-way substrate integrated waveguide power divider with improved isolation

Circuit World ◽

10.1108/cw-04-2020-0074 ◽

2021 ◽

Vol ahead-of-print (ahead-of-print) ◽

Author(s):

Arun Kumar Gande ◽

Souma Guha Mallick ◽

Bijit Biswas ◽

Sayan Chatterjee ◽

Dipak Ranjan Poddar

Keyword(s):

Return Loss ◽

Power Divider ◽

Substrate Integrated Waveguide ◽

Fractional Bandwidth ◽

Coupling Region ◽

Content Type ◽

Power Dividers ◽

Power Coupling ◽

Input And Output ◽

Input Matching

Purpose This paper aims to present a compact, broadband substrate integrated waveguide (SIW) three-way power divider with improved isolation based on six-port SIW coupler. Design/methodology/approach The power coupling among the three output ports occurs due to short openings in the narrow walls of the central SIW channel. Performance improvement in the isolation and return loss among ports is achieved using matching posts placed at the input and output ends of the coupling region. This enhances the coupling between TE10 and TE30 modes. The input matching ports enhance the return loss, whereas the isolation is alleviated by both the input and output matching posts. The bandwidth enhancement is achieved by optimizing the outer SIW channel widths. Findings The measured fractional bandwidth of 27.3% with over 15 dB of isolation and return loss is achieved. The coupling length is 1.55 λg at the centre frequency. The power divider achieves better than 15 dB isolation between non-adjacent output ports. The measured reflection and isolation coefficients are in close agreement with simulated results over 8.2 to 10.8 GHz. Practical implications Isolation between the adjacent and non-adjacent ports is an important parameter as the reflections from these ports will interfere with signals from other ports reducing the fractional bandwidth of the power divider and affecting the overall performance of the transmitters and receivers. Originality/value The authors present the enhancement of isolation between the output non-adjacent ports by optimizing the SIW channel width and matching post in the coupling region to reduce the reflected signals from non-adjacent ports entering into other ports. To the author’s knowledge, this is the only SIW three-way power divider paper showing non-adjacent port isolation among six-port couplers based three-way power dividers.

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COMPACT WILKINSON PASS-BAND FILTERING POWER DIVIDER BASED ON QUARTER-WAVELENGTH SIDE-COUPLED RING

Journal of Circuits System and Computers ◽

10.1142/s0218126614501357 ◽

2014 ◽

Vol 23 (10) ◽

pp. 1450135

Author(s):

YONGLE WU ◽

QIANG LIU ◽

JUNYU SHEN ◽

YUANAN LIU

Keyword(s):

Low Cost ◽

Single Layer ◽

Power Divider ◽

Pass Band ◽

Fractional Bandwidth ◽

Coupled Line ◽

Quarter Wavelength ◽

Wilkinson Power Divider ◽

Isolation Performance ◽

Wavelength Side

A Wilkinson power divider with improved bandpass filtering and high isolation performance is proposed. These characteristics are achieved by replacing the quarter-wavelength transmission line in the conventional coupled line Wilkinson power divider with quarter-wavelength side-coupled ring (QSCR). Additional features such as DC blocking between arbitrary two ports, single-layer via-less structure for low-cost fabrication and convenient integration (as only one isolation resistor required) are highlighted. A 2-GHz Wilkinson microstrip power divider with a fractional bandwidth of 4% has been fabricated and experimentally characterized. The consistency between simulated and measured results validates the effectiveness of our proposed design.

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Miniaturization of Broadband Wilkinson Power Dividers

Indonesian Journal of Electrical Engineering and Computer Science ◽

10.11591/ijeecs.v10.i1.pp241-247 ◽

2018 ◽

Vol 10 (1) ◽

pp. 241

Author(s):

Nadera Najib ◽

Kok Yeow You ◽

Chia Yew Lee ◽

Mohamad Ngasri Dimon ◽

Nor Hisham Khamis

Keyword(s):

Transmission Lines ◽

Power Divider ◽

Center Frequency ◽

Fractional Bandwidth ◽

Power Dividers ◽

The Third ◽

Operating Frequency Range ◽

Phase Balance ◽

Line Design ◽

Wilkinson Power Dividers

This paper proposed three modified Wilkinson power dividers in order to achieve a size reduction and a wide bandwidth. The first structure presented the power divider using compact folded step impedance transmission lines rather than the uniform microstrip line design for operating center frequency of 3 GHz. The second structure showed the power divider with delta-stub for 2.4 GHz. Finally, the third modified structure introduced the two-section Wilkinson power divider using series-delta stub for center frequency of 2.4 GHz as well. The study managed to get an overall dimension of 15 mm × 9.5 mm for the first proposed design achieving a reduction of 75.6 % and fractional bandwidth of 133 %. For the second proposed structure, the size was 15 mm × 15 mm with a reduction of 56 % and fractional bandwidth of 56 %. While the third design size was 17 mm × 15 mm with a reduction of 63.6 % and the structure achieved a broadband bandwidth with fractional bandwidth of 220 %. The proposed power dividers used RT/duroid 5880 substrate with a thickness of 0.38 mm. Simulation and measurement results indicated that the modified power dividers showed equal power division, good phase balance, high isolation between output ports, and good return loss better than -12 dB covering the operating frequency range<strong>.</strong>

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A Novel Analytical Design Technique for a Wideband Wilkinson Power Divider Using Dual-Band Topology

Sensors ◽

10.3390/s21196330 ◽

2021 ◽

Vol 21 (19) ◽

pp. 6330

Author(s):

Asif I. Omi ◽

Rakibul Islam ◽

Mohammad A. Maktoomi ◽

Christine Zakzewski ◽

Praveen Sekhar

Keyword(s):

Transmission Lines ◽

Return Loss ◽

Power Divider ◽

Dual Band ◽

Design Technique ◽

Fractional Bandwidth ◽

Coupled Line ◽

Analytical Design ◽

Resonance Frequencies ◽

Wilkinson Power Divider

In this paper, a novel analytical design technique is presented to implement a coupled-line wideband Wilkinson power divider (WPD). The configuration of the WPD is comprised of three distinct coupled-line and three isolation resistors. A comprehensive theoretical analysis is conducted to arrive at a set of completely new and rigorous design equations utilizing the dual-band behavior of commensurate transmission lines. Further, the corresponding S-parameters equations are also derived, which determine the wideband capability of the proposed WPD. To validate the proposed design concept, a prototype working at the resonance frequencies of 0.9 GHz and 1.8 GHz is designed and fabricated using 60 mils thick Rogers’ RO4003C substrate. The measured result of the fabricated prototype exhibits an excellent input return loss > 16.4 dB, output return loss > 15 dB, insertion loss < 3.30 dB and a remarkable isolation > 22 dB within the band and with a 15 dB and 10 dB references provide a fractional bandwidth of 110% and 141%, respectively.

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A novel Wilkinson power divider using lowpass filter with harmonics suppression and high fractional bandwidth

Microelectronics Journal ◽

10.1016/j.mejo.2017.11.011 ◽

2018 ◽

Vol 71 ◽

pp. 61-69 ◽

Cited By ~ 3

Author(s):

Gholamreza Karimi ◽

Samira Menbari

Keyword(s):

Power Divider ◽

Lowpass Filter ◽

Fractional Bandwidth ◽

Wilkinson Power Divider

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Wilkinson Power Divider with Band-pass Filtering Response and Harmonics Suppression Using Open and Short Stubs

Frequenz ◽

10.1515/freq-2019-0200 ◽

2020 ◽

Vol 74 (5-6) ◽

pp. 169-176

Author(s):

Saeedeh Lotfi ◽

Saeed Roshani ◽

Sobhan Roshani ◽

Maryam Shirzadian Gilan

Keyword(s):

Transmission Lines ◽

Power Divider ◽

Initial Structure ◽

Fractional Bandwidth ◽

Transmission Zeros ◽

Measurement Results ◽

Good Accordance ◽

Operational Frequency ◽

Band Pass ◽

Wilkinson Power Divider

AbstractIn this paper, a new Wilkinson Power Divider ‎‎(WPD) using open and short stubs is proposed. ‎Open and short stubs are utilized instead of 1/4 wave transmission lines in initial ‎structure to achieve harmonics suppression. The proposed WPD is designed for ‎operational frequency of 0.9 GHz and creates 3 transmission ‎zeros at 1.8 GHz, 2.7 GHz and 3.6 GHz, for suppressing second, third and fourth harmonics. The proposed WPD has been fabricated and the ‎measurement results are in good accordance with simulation results. The designed ‎WPD has a 22 % fractional bandwidth with 0.1 dB insertion loss.‎

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Wideband isolation-improved substrate-integrated waveguide power dividers/combiners

International Journal of Microwave and Wireless Technologies ◽

10.1017/s1759078718000995 ◽

2018 ◽

Vol 10 (9) ◽

pp. 1019-1027

Author(s):

Yong Mao Huang ◽

Haiyan Jin ◽

Yuliang Zhou ◽

Supeng Leng ◽

Maurizio Bozzi

Keyword(s):

Insertion Loss ◽

The Other ◽

Power Divider ◽

Substrate Integrated Waveguide ◽

Fractional Bandwidth ◽

Balance Performance ◽

Power Dividers ◽

Lumped Resistors ◽

Better Than ◽

Good Agreement

AbstractIn this paper, a 3 dB H-plane substrate-integrated waveguide (SIW) power divider/combiner with improved isolation is reported. By adding two isolated ports into the Y-junction, it will perform like a multi-port coupler, so that the isolation between its dividing ports can be effectively improved as the newly-added ports are properly matched. To verify the availability and effectiveness of this concept, two prototypes, one is terminated by coaxial terminations and the other is loaded with lumped resistors, are developed. Their measured results are separately in good agreement with their corresponding simulations. Meanwhile, isolations better than 16 dB with fractional bandwidth (FBW) of 35 and 25% are achieved, respectively, as well as low phase and amplitude imbalances. Compared with some reported similar SIW power dividers, the proposed ones exhibit wider FBW with similar isolation, insertion loss, phase, and amplitude balance performance.

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