Computer Sciences and Information Technology
Title : | Frequency reconfigurable/multi-band RF Passive Circuits and Load Modulated Balanced Amplifier for 5G |
Area of research : | Computer Sciences and Information Technology |
Focus area : | Electrical Engineering, Telecommunications |
Principal Investigator : | Dr. Aijaz Mehdi Zaidi, Dr. B R Ambedkar National Institute Of Technology, Jalandhar, Punjab |
Timeline Start Year : | 2024 |
Timeline End Year : | 2026 |
Contact info : | aijaz.zaidi72@gmail.com |
Details
Executive Summary : | RF design engineers are looking for frequency re-configurable/multi-band RF circuits/systems that can function for 5G provide support to 4G and easily migrate to 6G. The latest and upcoming wireless standards (4G, 5G, 6G) are using more complex modulation schemes such as QAM or multiple access schemes such as OFDM. These signals have fast envelope variation which leads to a high peak-to-average power ratio (PAPR). In presence of such high PAPR signals, the PA has to be operated at a certain average power level backed off from the peak power. The conventional PA shows poor efficiency at back-off. Several manufacturers, including Ericsson, Samsung, Nokia, and Huawei are utilizing the load modulation technique to increase the effectiveness of PA at the back-off level to manage waveforms with high PAPR. Two architectures are available to perform load modulation: Doherty PA and Load Modulated Balanced Amplifier (LMBA). The Doherty structure has some drawbacks, such as: 1) the operating bandwidth is constrained by the inclusion of a ʎ/4 transmission line (TL) and 2) Doherty load modulation and auxiliary power recovery are interdependent. These drawbacks make Doherty's architecture a poor choice for 5G applications. The LMBA is a promising remedy for the aforementioned problems and can meet the broadband capacity needed for 5G. In LMBA, the load is modulated by injecting a control signal power (CSP) at the isolated port of the output 90° coupler and recovered at the output of the balanced PA. It has a number of benefits over the Doherty design, which can be summed up as follows: 1) It offers more bandwidth than the Doherty architecture since the coupler offers more bandwidth than the ʎ/4 TL transformer. 2) The CSP power recovery and LMBA load regulation operate independently. A frequency reconfigurable/multi-band LMBA is a preferable option because it can be designed first it can be designed for 5G operating band for India and further can be reconfigured for another technology or band. Reconfigurable passive RF circuits such as power combiner/coupler, power divider, and matching circuits must be developed if a re-configurable LMBA is to be created. In addition to being necessary for PA design, these passive circuits are also crucial for transceiver design. Therefore, the objective of this project is to develop reconfigurable RF passive circuits and LMBA for 5G. A few works are reported for LMBA architecture (Check references list). Yet, several research gaps (Check State of Art) are existing in this domain. The objectives of this proposal also fulfill several research gaps present in this domain. Furthermore, the outcome of this project will be beneficial in many ways, new theories will be introduced for designing reconfigurable RF circuits, and prototypes of them will be delivered to the funding agency. In addition, the outcome will be published in journals of international repute, and researchers/students across the world will get benefit from them. |
Total Budget (INR): | 22,04,710 |
Organizations involved