Dual-frequency power divider with isolation stubs

Wu, Yongle; Liu, Y.; Liu, Xin

doi:10.1049/el:20082420

Cited by 39 publications

(22 citation statements)

References 9 publications

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“…Most of them are inphase between the two output ports [1][2][3][4][5][6][7][8]. But in some applications such as baluns, push-pull amplifiers and antenna feeding networks, out-of-phase characteristic is respected between the two output ports.…”

Section: Introductionmentioning

confidence: 99%

A Symmetrical Outputs Uniplanar Out-of-Phase Power Divider Without Phase Shifter

Miao¹,

Zheng²,

Yang³

et al. 2014

PIER Letters

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Abstract-A new out-of-phase power divider (PD) without phase shifter at the output ports is proposed. Based on admittance matrix, a new topology of uniplanar power divider with symmetrical outputs is designed. Under conditions of good matching, perfect isolation, and 180 • phase difference between two output ports, the corresponding design equations and synthesis procedures are derived and given with admittance matrix. To verify the design approach, an out-of-phase power divider operating at 2 GHz with equal power division ratio is designed, fabricated, and measured. Experimental results demonstrate that the input return loss is better than 32 dB, the insertion loss is less than 0.29 dB and the isolation is better than 33 dB. The amplitude imbalance between the output ports is 0.03 dB and the phase difference between the two output ports is 181.6 • at the operation frequency. Further more, 49.9% relative bandwidth of 15 dB return loss and 39.4% relative bandwidth of 20 dB port isolation are achieved.

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Section: Introductionmentioning

confidence: 99%

A Symmetrical Outputs Uniplanar Out-of-Phase Power Divider Without Phase Shifter

Miao¹,

Zheng²,

Yang³

et al. 2014

PIER Letters

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“…Rapid developments in modern wireless communication have imposed their components to operate at dual-band and multiple bands. The corresponding dual-frequency power divider with analytical design method was developed after Dr. Monzon derived the closed-form design equations for the dual frequency impedance transformer [2], and various novel structures have been proposed in 32]. To satisfy the ideal isolation and improve the matching characteristics, new isolation structures including parallel RLC and series RLC are proposed in [3][4][5][6].…”

Section: Introductionmentioning

confidence: 99%

A Generalized Coupled-Line Dual-Band Wilkinson Power Divider With Extended Ports

Li¹,

Wu²,

Liu³

et al. 2012

PIER

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Abstract-A generalized two-way coupled-line power divider with extended ports for dual band is proposed in this paper. The power divider is composed of two section coupled-lines, one conventional transmission line, and an isolation resistor, and employs extension of a transmission line or coupled-line at each port. The design equations are obtained based on even-and odd-mode analysis, and analytical ideal closed-form scattering parameter expressions derived. Because the traditional ring structure is a special case of coupled line, four cases of this generalized power divider are discussed and compared. In addition, the six power dividers simulated results of three special cases are shown. Finally, three fabricated power dividers measurements are used to certify this proposed structure and corresponding design parameters.

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“…In usual, the conventional power dividers are designed at a single band [8][9][10][11]. Recently, many researches have been made in designing new Wilkinson power dividers for dual-frequency application [12][13][14][15][16][17][18][19][20]. In obtaining ideal isolation effect in various dualfrequency power dividers, three novel isolation structures including parallel RLC [13], series RLC [14], and combining of parallel R and series LC [15] demonstrate better isolating effect than traditional single resistor isolators on the same layouts.…”

Section: Introductionmentioning

confidence: 99%

“…In obtaining ideal isolation effect in various dualfrequency power dividers, three novel isolation structures including parallel RLC [13], series RLC [14], and combining of parallel R and series LC [15] demonstrate better isolating effect than traditional single resistor isolators on the same layouts. In [16][17][18][19][20], other modified types of Wilkinson power dividers without reactive components have been proposed to operate at dual band. In order to break the limit of equal output power at the two outports of these dual band power dividers in [12][13][14][15][16][17][18][19][20], dual band power dividers with unequal power dividing have been proposed in [21] and [22], however, the design parameters cannot be obtained using analytical approach [21] while the perfect matching of outports in the corresponding design procedure are not theoretically considered [22].…”

Section: Introductionmentioning

confidence: 99%

“…In [16][17][18][19][20], other modified types of Wilkinson power dividers without reactive components have been proposed to operate at dual band. In order to break the limit of equal output power at the two outports of these dual band power dividers in [12][13][14][15][16][17][18][19][20], dual band power dividers with unequal power dividing have been proposed in [21] and [22], however, the design parameters cannot be obtained using analytical approach [21] while the perfect matching of outports in the corresponding design procedure are not theoretically considered [22]. Furthermore, to obtain the perfect matching at all of ports and isolation between the two outports, a new unequal Wilkinson power divider for a frequency and its first harmonic has been proposed in [23].…”

Section: Introductionmentioning

confidence: 99%

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An Unequal Dual-Frequency Wilkinson Power Divider With Optional Isolation Structure

Wu¹,

Liu²,

Li³

2009

PIER

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Abstract-In this paper, we propose a generalized Wilkinson power divider operating at two arbitrary frequencies with unequal power dividing ratio. To achieve unequal power division and perfect matching at dual-frequency, a novel structure consisted of four dual-frequency transformers in two sections is proposed. For the compact power divider, the parallel and series RLC structures can be chosen to obtain effective isolation between the two outports according to different frequency ratios. Furthermore, the closed-form design equations of the unequal dual-frequency power divider are derived based on circuit theory and transmission line theory. Finally, simulation and experiment results of two examples including parallel and series RLC structures indicate that all the theoretical features of these unequal power dividers can be fulfilled at dual-frequency simultaneously.

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Dual-frequency power divider with isolation stubs

Cited by 39 publications

References 9 publications

A Symmetrical Outputs Uniplanar Out-of-Phase Power Divider Without Phase Shifter

A Symmetrical Outputs Uniplanar Out-of-Phase Power Divider Without Phase Shifter

A Generalized Coupled-Line Dual-Band Wilkinson Power Divider With Extended Ports

An Unequal Dual-Frequency Wilkinson Power Divider With Optional Isolation Structure

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