CMOS fully integrated quasi-circulator with self-interference cancellation technique

CMOS fully integrated quasi-circulator with self-interference cancellation technique

For access to this article, please select a purchase option:

Buy article PDF
(plus tax if applicable)
Buy Knowledge Pack
10 articles for $120.00
(plus taxes if applicable)

IET members benefit from discounts to all IET publications and free access to E&T Magazine. If you are an IET member, log in to your account and the discounts will automatically be applied.

Learn more about IET membership 

Recommend Title Publication to library

You must fill out fields marked with: *

Librarian details
Your details
Why are you recommending this title?
Select reason:
Electronics Letters — Recommend this title to your library

Thank you

Your recommendation has been sent to your librarian.

In this Letter, the authors propose a novel fully integrable architecture for a quasi-circulator. It is comprised of an inductorless and wideband structure and off-chip components are not required. This solution is appropriate for use in backscattering systems, such as RFID-tag readers. The proposed quasi-circulator differs from passive off-chip circulators because the power amplifier is embedded and the terminals have non-standard impedances. Thus, they propose a leakage figure as a figure-of-merit, which is related to the isolation of conventional circulators. The structure described herein is applied to a wireless power transfer system with an output power of 25 dBm at 990 MHz.


    1. 1)
    2. 2)
    3. 3)
    4. 4)
    5. 5)
      • 5. Cabrera, F.L., Sousa, F.R.: ‘A 25-dBm 1-GHz power amplifier integrated in CMOS 180 nm for wireless power transferring’. Proc. of the 28th Symp. on Integrated Circuits and Systems Design, Salvador, Brazil, 31 August–4 September 2015, pp. 16.
    6. 6)

Related content

This article has following corresponding article(s):
This is a required field
Please enter a valid email address