Dual-Band Wilkinson Power Dividers Using a Series RLC Circuit

A New Simplified Approach for Design of Dual-Band Wilkinson Power Divider with Two and Three Transmission Line Sections Using Only Even-Mode Analysis

“…With the advent of multiband transceiver systems, research focus has been shifted towards design of multi-band WPDs, digressing from the well-established design guidelines of conventional single frequency band WPD [1]. For example, for dual-band operations (such as, but not limited to, GSM and PCS for cellular phones), many techniques have been proposed for dual-band WPD design encompassing two Transmission lines (TL) sections equal split [2][3][4][5][6][7], rat-race couplers [8], three TL sections equal-split [9], unequal division [10][11] and meta-material based implementation of WPD [12][13] [14][15]. A two TL sections WPD with length equal to one third of the design wavelength was proposed in [2].…”

“…Subsequently, in order to improve S-parameters response like insertion loss, return loss and ports isolation (S21/S31, S11/S22/S33, and S23 respectively), RLC component were used in [4][5][6][7]. Clearly for formulation of generic design guidelines over a wide frequency band, LC components response may vary with the change in frequency and may additionally have increasing parasitic effects as the frequency goes higher.…”

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

“…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.…”

“…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. 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 [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].…”