Design of a dual-band Wilkinson power divider using metamaterial transmission lines

A Simple and Adjustable Technique for Effective Linearization of Power Amplifiers Using Harmonic Injection

“…Considering the main harmonic power level at the PA output (40 dBm) and the main harmonic power level required at the SHG input (20 dBm such that each amplifier of PDP has an input power of around 16-17 dBm), a directional coupler with a coupling coefficient of 20 dB and minimum insertion loss at the PA operating frequency was designed and placed at the output of the PA. Also, to combine the power of the input signal and the injection signal (including the SH and the main harmonics) at the input of the circuit, a wideband two-stage Wilkinson combiner covering 1.4 GHz to 3.2 GHz was designed [28].…”

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].…”