Wilkinson power divider incorporating quasi-elliptic filters for improved out-of-band rejection

Shao, Jinghai; Huang, Shanshan; Pang, Yi-Hsin

doi:10.1049/el.2011.2766

Cited by 94 publications

(89 citation statements)

References 6 publications

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“…In the comparison table, it can be seen that references [4][5][6][7] present very high IL while maintaining reasonable input/output port RL and isolation. On the other hand, [8][9][10] have good IL, but with some compromise on the RL and isolation.…”

Section: Comparison Of the Proposed Methodology With Previous Workmentioning

confidence: 99%

On the design of equal division single-band filtering dividers with an extended transmission line and resistor as isolation elements

Khan¹,

Zhao²

2017

Turk J Elec Eng & Comp Sci

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This paper introduces a new scheme for effective output port isolation and return loss in RF-filtering divider design. The proposed design incorporates an extended transmission line and a conventional resistor as isolation elements.The technique has a simpler microstrip circuit implementation when it comes to the integration of a single-band bandpass filter with a Wilkinson power divider to achieve simultaneous filtering-dividing action. It is established that if a band-pass filter with a certain fractional-bandwidth is matched to 70.7 Ω , a transmission line section and isolation resistor are sufficient for achieving reasonable output port return loss and isolation in the resulting filtering divider.In experimental validation, two single-band band-pass filters, namely a coupled-line filter and an open-loop coupled resonator triangular filter with center frequencies of 3 GHz and 1 GHz, respectively, effectively replace the conventional quarter-wavelength transformers for equal division of power. The proposed filtering divider structures were fabricated and a reasonable agreement was observed between respective simulated and measured S-parameter responses. The experimental results for a coupled-line filtering power divider and an open-loop triangular filtering power divider were as follows: 1 dB fractional-bandwidths of 15.3% and 12%, port isolations better than 31 dB and 20 dB, and good out-of-band performances up to 2.67f 0 and 2.85f 0 , respectively.

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Section: Comparison Of the Proposed Methodology With Previous Workmentioning

confidence: 99%

On the design of equal division single-band filtering dividers with an extended transmission line and resistor as isolation elements

Khan¹,

Zhao²

2017

Turk J Elec Eng & Comp Sci

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“…To design the filtering power divider, the design procedures can be summarized as follows [13,15]. Firstly, determine the geometry parameters of resonators to be resonant at the centre frequency.…”

Section: Circuit Implementationmentioning

confidence: 99%

“…Recently, a few integrated designs have been developed [6][7][8][9][10][11][12][13][14]. In [6][7][8], the filtering and power splitting functions are realized by cascading a filtering structure with a Wilkinson power divider.…”

Section: Introductionmentioning

confidence: 99%

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Novel Filtering Power Divider Using Multiple Internal Resistors

Dai²

2014

PIER Letters

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Abstract-In this paper, we present a novel 3rd filtering power divider with high in-band isolation. The proposed device employs six quarter-wavelength resonators and six internal isolation resistors symmetrically arranged to require the power division and filtering function. Based on the circuit topology, the multiple resistors can be integrated to obtain a good isolation and port impedance matching. Compared to the conventional power divider with bandpass response, the new device is easy to realize a high-order design with a good isolation. For demonstration, a prototype operating at 1.5 GHz with more than 20 dB in-band isolation is implemented. Simulated and experimental results agree well, validating the proposed methodologies.

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“…Thus, it is necessary to integrate the two functions into one device for miniaturization. In the past, some integrated designs were proposed [9][10][11][12][13][14][15][16][17][18][19][20]. In [9], the filtering structure is cascaded with the T-junction, resulting in dual functions of power dividing and filtering.…”

Section: Introductionmentioning

confidence: 99%

Filtering Power Divider Based on Lumped Elements

Xu¹,

Pan²,

Gao³

et al. 2014

PIER Letters

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Abstract-This paper presents a novel method to design filtering power divider with compact size. Based on lumped elements, a novel topology is proposed and theoretically analyzed. The equivalent power splitting circuits and filtering circuits are characterized by even-odd-mode analysis. Closedform design equations are obtained, and all the unknown parameters can be derived. Meanwhile, two transmission zeros are produced near the passband edges, resulting in high-selectivity quasi-elliptic responses. For demonstration, a filtering power divider is implemented. The circuit operating at 600 MHz occupies only 15 mm × 14 mm.

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Wilkinson power divider incorporating quasi-elliptic filters for improved out-of-band rejection

Cited by 94 publications

References 6 publications

On the design of equal division single-band filtering dividers with an extended transmission line and resistor as isolation elements

On the design of equal division single-band filtering dividers with an extended transmission line and resistor as isolation elements

Novel Filtering Power Divider Using Multiple Internal Resistors

Filtering Power Divider Based on Lumped Elements

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