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Abstract
In In-Band Full Duplex (IBFD) transceivers, Electrical Balance Duplexers (EBDs) provide Transmit (TX)-Receive (RX) isolation to implement a form of self-interference (SI) cancellation to facilitates simultaneous transmission and reception from a single antenna. EBD works by coupling transmitter, receiver, antenna, and balancing impedance using a hybrid coupler. The balancing impedance in the EBD needs to be equal as much as possible to the antenna impedance to achieve a high isolation while the antenna impedance variations limit the isolation bandwidth. Hybrid couplers are also not ideal elements, and their S parameters are variable in frequency domain. An antenna with a stable impedance, designed by authors, has been connected in this work to two different hybrid couplers in the EBD stages. One coupler is a commercial coupler and the other one, designed by the authors, has more S parameter stability in the frequency domain than the commercial one. It is shown that by using the designed coupler in the front-end EBD stage more stable isolation bandwidth and 45% better isolation value at ultra-wideband range of 1.5- 3.5GHz are obtained, in comparison when using the commercial one.
Original language | English |
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Title of host publication | 2021 IEEE International IOT, Electronics and Mechatronics Conference (IEMTRONICS) |
Publisher | Institute of Electrical and Electronics Engineers (IEEE) |
Number of pages | 6 |
ISBN (Electronic) | 978-1-6654-4067-7 |
ISBN (Print) | 978-1-6654-1160-8 |
Publication status | Published - 14 May 2021 |
Event | International IOT, Electronics and Mechatronics Conference: IEMTRONICS 2021 - Toronto, Canada Duration: 21 Apr 2021 → 24 Apr 2021 |
Conference
Conference | International IOT, Electronics and Mechatronics Conference |
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Abbreviated title | IEMTRONICS 2021 |
Country/Territory | Canada |
City | Toronto |
Period | 21/04/21 → 24/04/21 |
Keywords
- Interference cancellation
- Frequency-domain analysis
- Transmitting antennas
- Receiving antennas
- Couplers
- Bandwidth
- Stability analysis
Fingerprint
Dive into the research topics of 'How Stability of Hybrid Coupler Characteristic Affects Front-End Isolation of In-Band Full Duplex System'. Together they form a unique fingerprint.Projects
- 1 Finished
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SENSE: Scalable Full Duplex Dense Wireless Networks
Beach, M. A. (Principal Investigator)
1/11/16 → 31/03/21
Project: Research