Design of Wide-band Power Amplifier based on Power Combiner Technique with Low Intermodulation Distortion

Abstract

RF power amplifiers are one of challenging blocks in designing radio frequency transceivers, this is due to non-linearity behavior of power amplifiers that leads to inter-modulation distortion. This paper presents the design of wide-band power amplifier which combined with parallel coupled line band pass filter at the input and output of power amplifier to allow the only required frequency band to pass through the power amplifier. Class-A topology and ATF-511P8 transistor are used in this design. Advanced Design System software used as a simulation tool to simulate the designed wide-band power amplifier. The simulation results showed an input return loss (S11) which less than -10dB, and gain (S21) is higher than 10 dB over the entire frequency band and considers as flat as well. The designed amplifier is stable over the bandwidth (K>1). Inter-modulation distortion is -56.919dBc which is less than -50dBc with 10dBm input power. The designed amplifier can be used for the microwave applications which include weather radar, satellite communication, wireless networking, mobile, and TV.

Design of high power amplifier based on wilkinson power combiner for wireless communications

“…PA is the most important block that amplifies the RF signal to power the antenna and provides the highest possible gain with the lowest possible reflectance. There have been many studies on designing and manufacturing power amplifiers performed in different frequency bands [1]- [25] and solving issues such as: increase power and efficiency [3], [6]- [8], [12], [16], increase circuit bandwidth and reduce intermodulation distortion [1], [5], [9]- [11], [13]- [15], [17]- [25].…”

A two-stage power amplifier design for ultra-wideband applications

“…Digital pulse wireless, more commonly known as ultra-wideband is a high bandwidth radio technology is used for short range and low-power communications [1][2][3][4][5]. UWB has come to be known as a direct competitor to bluetooth and WiMax as it can fully utilize high data rate along with wide spectrum efficiency while using less or very low power transmission [6][7][8][9][10][11][12][13][14][15].…”

“…Two solutions have been proposed by the IEEE802.15.3a. The first proposal is the multiband orthogonal frequency division multiplexing (MBOFDM) UWB and the second represents the direct sequence code division multiple access (DS_CDMA) UWB [16][17][18][19][20][21][22][23][24][25]. The first generation UWB system uses a low-frequency band of 3.5 to 5.1 GHz in its required approach.…”

Design and simulate a doherty power amplifier using GaAs technology for telecommunication applications

“…The rapid growth of mobile telecommunication services has increased demand for low-cost, high-efficiency, and compact equipment. Generally, power amplifier (PA) is one of the most important subsystems for radio frequency (RF) transmitters [6]. Power Amplifiers (PA) are very indispensable components in the design of numerous types of communication transmitters employed in microwave technology [7].…”