Design and Implementation of an Analog High Power Broadband Self Interference Canceller for In Band Full Duplex

A Self-Interference Canceler is the principle component that allows for Simultaneous Transmit And Receive (STAR) of radio signal broadcasting. Previous research and designs by other groups have resulted in systems that either operate at high powers or are capable of cancellation over a wide bandwidth. This work seeks to build upon previous research in order to design an analog SIC that is capable of both high power (∼100W) and wide instantaneous bandwidth (∼1GHz) cancellation. The system is designed as a vector modulator using off-the-shelf hybrid couplers and switches with a custom variable attenuator designed using PIN diodes in a Waugh attenuator architecture. The system was fabricated on a four layer PCB and measured with a network analyzer. Simulated results for variable attenuator and overall vector modulator are presented.

Name thesis:degree_name

Master

Department dc:contributor.department

Massachusetts Institute of Technology. Department of Electrical Engineering and Computer Science

Grantor dc:publisher

Massachusetts Institute of Technology

Year dc:date.issued

2025

Author dc:creator

• Hanly, Bianca Marie

Advisors dc:contributor.advisor

• Kolodziej, Kenneth E.
• Notaros, Jelena

Statement dc:rights

• In Copyright - Educational Use Permitted
• Copyright retained by author(s)

Licence dc:rights.uri

• https://rightsstatements.org/page/InC-EDU/1.0/

Handle dc:identifier.uri

https://hdl.handle.net/1721.1/162679

OAI identifier oai:identifier

oai:dspace.mit.edu:1721.1/162679