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A Miniaturized Marchand Balun in CMOS With Improved Balance for Millimeter-Wave Applications

Xu, Leijun ; Sjöland, Henrik LU orcid ; Törmänen, Markus LU orcid ; Tired, Tobias LU ; Pan, Tianhong and Bai, Xue (2014) In IEEE Microwave and Wireless Components Letters 24(1). p.53-55
Abstract
The analysis and design of a millimeter-wave passive balun on silicon substrate with small size and good balance is presented. The reason for the imbalance of the balun is analyzed and a novel method using two grounded T bars beneath the coupled lines to tune the balance is proposed. The balun was fabricated in a 65 nm CMOS process, by using broadside coupled lines with small separation, the length of balun is reduced, resulting in a size of only 0.01 mm$^{2}$. In the 57–67 GHz band, the measured amplitude imbalance is less than 0.5 dB and the phase imbalance is less than 1 $^{circ}$. This method for optimizing the imbalance of balun is efficient and it does not increase the size of balun.
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author
; ; ; ; and
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
Broadside coupled line, CMOS, Marchand balun, millimeter-wave, imbalance
in
IEEE Microwave and Wireless Components Letters
volume
24
issue
1
pages
53 - 55
publisher
IEEE - Institute of Electrical and Electronics Engineers Inc.
external identifiers
  • wos:000329873700019
  • scopus:84892443850
ISSN
1531-1309
DOI
10.1109/LMWC.2013.2288270
language
English
LU publication?
yes
id
d537d7f7-5323-49db-b8d1-0731be4bb076 (old id 4194569)
date added to LUP
2016-04-01 14:49:50
date last changed
2024-01-10 09:09:30
@article{d537d7f7-5323-49db-b8d1-0731be4bb076,
  abstract     = {{The analysis and design of a millimeter-wave passive balun on silicon substrate with small size and good balance is presented. The reason for the imbalance of the balun is analyzed and a novel method using two grounded T bars beneath the coupled lines to tune the balance is proposed. The balun was fabricated in a 65 nm CMOS process, by using broadside coupled lines with small separation, the length of balun is reduced, resulting in a size of only 0.01 mm$^{2}$. In the 57–67 GHz band, the measured amplitude imbalance is less than 0.5 dB and the phase imbalance is less than 1 $^{circ}$. This method for optimizing the imbalance of balun is efficient and it does not increase the size of balun.}},
  author       = {{Xu, Leijun and Sjöland, Henrik and Törmänen, Markus and Tired, Tobias and Pan, Tianhong and Bai, Xue}},
  issn         = {{1531-1309}},
  keywords     = {{Broadside coupled line; CMOS; Marchand balun; millimeter-wave; imbalance}},
  language     = {{eng}},
  number       = {{1}},
  pages        = {{53--55}},
  publisher    = {{IEEE - Institute of Electrical and Electronics Engineers Inc.}},
  series       = {{IEEE Microwave and Wireless Components Letters}},
  title        = {{A Miniaturized Marchand Balun in CMOS With Improved Balance for Millimeter-Wave Applications}},
  url          = {{http://dx.doi.org/10.1109/LMWC.2013.2288270}},
  doi          = {{10.1109/LMWC.2013.2288270}},
  volume       = {{24}},
  year         = {{2014}},
}