Miniaturized multi‐frequency Wilkinson power dividers based on nonuniform coplanar waveguide

Abstract

In this work, the design of miniaturized dual‐ and triple‐ frequency Wilkinson power dividers using nonuniform coplanar waveguides is presented. The miniaturized configurations are achieved by replacing the conventional uniform arms with their equivalent multi‐frequency nonuniform transmission lines. The nonuniform width variation is governed by a truncated Fourier series expansion with coefficients optimized to obtain the desired multi‐frequency operation. The optimization process is carried out through the analysis of the even/odd mode circuits. The proposed dividers are simulated, fabricated, and measured to validate the design methodology. Simulated and measured results agree very well, and show input/output ports return loss and isolation better than 14.4 dB and transmission parameters in the range of −3 ± 2 dB at the design frequencies. Size reduction of 16.7% and 17.6% are achieved for the fabricated dual‐ and triple‐frequency dividers, respectively.

Multiple design approach of dual‐band Wilkinson power divider with arbitrary transmission line ratio

“…Nowadays, the rapid increase of wireless communication leads to a great demand in designing multiband components. [4][5][6] Many dual-band (DB) WPDs have been presented with only resistors, [7][8][9][10][11] open/short-ended stubs, 12,13 or lumped elements. [14][15][16][17][18][19][20] The WPD topology consisted of two-section transmission lines (TLs) and resistors are proposed in References 7-9, which has limited frequency ratio range (from 1 to 3) due to using equal physical lengths of TLs.…”

“…Conventional WPDs are normally designed and optimized at one single frequency. Nowadays, the rapid increase of wireless communication leads to a great demand in designing multiband components . Many dual‐band (DB) WPDs have been presented with only resistors, open/short‐ended stubs, or lumped elements …”