Title :
Broadband Tunable Third-Order IMD Cancellation Using Left-Handed Transmission-Line-Based Phase Shifter
Author :
Hongwoo Park ; Hyoungsuk Yoo ; Sungtek Kahng ; Hongjoon Kim
Author_Institution :
Dept. of Electr. Eng., Kyungpook Nat. Univ., Daegu, South Korea
Abstract :
We demonstrate a broadband tunable third-order intermodulation distortion (IMD) cancellation architecture using a left-handed transmission line (LHTL)-based phase shifter for a feedforward amplifier. The fabricated circuit reduces the third-order IMD of the main amplifier up to 17 dB after adjusting for any frequencies between 1.5 and 2.4 GHz when the frequency difference between the two tones is 2 MHz. In addition, the circuit maintains a spurious-free dynamic range that is greater than 55 dBc at the output. This effective broadband third-order IMD cancellation method is possible because of the broadband and linearly phase-tunable characteristics of the LHTL-based phase shifter.
Keywords :
UHF amplifiers; UHF phase shifters; feedforward amplifiers; interference suppression; intermodulation distortion; transmission lines; LHTL; broadband tunable third-order IMD cancellation architecture; feedforward amplifier; frequency 1.5 GHz to 2.4 GHz; intermodulation distortion; left-handed transmission-line-based phase shifter; linea phase-tunable characteristics; spurious-free dynamic range; Attenuators; Bandwidth; Broadband communication; Feedforward neural networks; Insertion loss; Phase shifters; Wireless communication; Amplifier; feedforward; intermodulation distortion; left-handed; phase shifter; transmission line;
Journal_Title :
Microwave and Wireless Components Letters, IEEE
DOI :
10.1109/LMWC.2015.2427655
