A concurrent 2.6/3.5GHz dual-band Doherty power amplifier with matching network based on composite right/left-handed unit cell

Abstract

This paper presents a dual-band matching network based on composite right/left-handed transmission line (CRLH-TL) unit cell to optimize the impedance matching of dual-band Doherty power amplifier (DPA). The number of CRLH unit cells in the matching network can be flexibly determined by theoretical calculation to achieve impedance matching at any two frequencies. Moreover, A dualband DPA is designed and fabricated using GaN HEMT CGH40010H to verify the performance of the proposed network. The designed DPA can deliver a saturation output power over 43.3 dBm and the drain efficiency (DE) over 55.2% in the frequencies of 2.6 GHz and 3.5 GHz. Meantime, the drain efficiency at the 5dB output power back-off (OPBO) is over 44% at 2.6 GHz and 3.5 GHz.

Design of Efficient Concurrent Dual-Frequency Doherty Power Amplifier Based on Step Impedance Low-Pass Filter

“…If the amplitude of the maximum allowable reflection coefficient in the passband is Γ m , then we can obtain Γ m = |A| from Equation (20), because in the passband for θ m < θ < π − θ m there is |secθ m cosθ| < 1, So there is |secθ m cosθ| ≤ 1 in the same range.…”

“…In one of these modes, the dual-frequency Doherty amplifier can obtain a bandwidth of 400 MHz. For high PAPR multi-band system applications, broadband DPAs and dual-band DPAs [15][16][17][18][19][20][21] are widely used.…”

Design of High-Efficiency Dual Band Power Amplifier Based on GaN HEMT

“…As the most expensive and energy-consuming device in base station equipment [1], the efficiency improvement of power amplifiers directly affects the performance of the entire transmitter and the energy consumption index of the entire base station and is also widely used in non-communication fields such as medical-surgical diagnosis, plasma lighting, and industrial heating and welding [2][3][4]. In today's increasingly crowded spectrum resources, amplifiers need to consider a wider range of frequency bands to meet different applications, therefore, the study of dual-band high-efficiency amplifiers is of great significance and value [5][6][7][8][9].…”

Dual band power amplifier with adjustable transmission zeros based on the parallel and series two section transmission line

“…As one of the most important devices, the PA has been received increasing attention for their performance such as output power, efficiency, bandwidth, etc. Common design techniques for DB PA include reconfigurable devices [3,4,5,6], DB IMN approaches [7,8,9,10,11,12,13,14] and real frequency techniques [15,16,17]. As the most developed approach, DB IMN enables efficient operation by transforming the required frequency-dependent complex load impedance at two arbitrary frequencies to the term impedance.…”