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Impedance Tuning Unit for DVB-H Front-End

Sjöblom, Peter LU orcid and Sjöland, Henrik LU orcid (2006) SSoCC (Swedish System-on-Chip Conference), 2006
Abstract
When implementing low frequency antennas in small devices, e.g., mobile phones using DVB-H, a large mismatch is inevitable. If a impedance tuning unit is introduced reflection losses and noise are reduced while gain is improved. A ITU consisting of 6 switched capacitances and 2 fixed LTCC inductors is studied. Simulations show that since a VSWR = 10 mismatch is reduced to better than VSWR = 2, the ITU increases the power delivered by 2.9 dB to 4.2 dB for an antenna mismatch between VSWR = 4 and VSWR = 8. In the same time, the average noise figure for VSWR = 4 is reduced by 1.4 dB from 4.6 dB to 3.2 dB; and for VSWR = 8 it is reduced by 2.8 dB from 6.4 dB to 3.7 dB. The highest noise figure for VSWR = 8 is reduced by 4.2 dB from 9.1 dB to... (More)
When implementing low frequency antennas in small devices, e.g., mobile phones using DVB-H, a large mismatch is inevitable. If a impedance tuning unit is introduced reflection losses and noise are reduced while gain is improved. A ITU consisting of 6 switched capacitances and 2 fixed LTCC inductors is studied. Simulations show that since a VSWR = 10 mismatch is reduced to better than VSWR = 2, the ITU increases the power delivered by 2.9 dB to 4.2 dB for an antenna mismatch between VSWR = 4 and VSWR = 8. In the same time, the average noise figure for VSWR = 4 is reduced by 1.4 dB from 4.6 dB to 3.2 dB; and for VSWR = 8 it is reduced by 2.8 dB from 6.4 dB to 3.7 dB. The highest noise figure for VSWR = 8 is reduced by 4.2 dB from 9.1 dB to 4.9 dB. (Less)
Please use this url to cite or link to this publication:
author
and
organization
publishing date
type
Chapter in Book/Report/Conference proceeding
publication status
published
subject
keywords
impedance matching, front-end, DVB, CMOS, capacitor bank, switched capacitor, ATU, reconfigurable matching, ITU
host publication
[Host publication title missing]
pages
4 pages
publisher
SSoCC (Swedish System on Chip Conference)
conference name
SSoCC (Swedish System-on-Chip Conference), 2006
conference location
Kålmården, Sweden
conference dates
2006-05-04 - 2006-05-05
language
English
LU publication?
yes
id
820116e5-9368-4ad7-972f-c9305324d6ae (old id 619894)
date added to LUP
2016-04-04 12:23:15
date last changed
2024-04-17 02:49:20
@inproceedings{820116e5-9368-4ad7-972f-c9305324d6ae,
  abstract     = {{When implementing low frequency antennas in small devices, e.g., mobile phones using DVB-H, a large mismatch is inevitable. If a impedance tuning unit is introduced reflection losses and noise are reduced while gain is improved. A ITU consisting of 6 switched capacitances and 2 fixed LTCC inductors is studied. Simulations show that since a VSWR = 10 mismatch is reduced to better than VSWR = 2, the ITU increases the power delivered by 2.9 dB to 4.2 dB for an antenna mismatch between VSWR = 4 and VSWR = 8. In the same time, the average noise figure for VSWR = 4 is reduced by 1.4 dB from 4.6 dB to 3.2 dB; and for VSWR = 8 it is reduced by 2.8 dB from 6.4 dB to 3.7 dB. The highest noise figure for VSWR = 8 is reduced by 4.2 dB from 9.1 dB to 4.9 dB.}},
  author       = {{Sjöblom, Peter and Sjöland, Henrik}},
  booktitle    = {{[Host publication title missing]}},
  keywords     = {{impedance matching; front-end; DVB; CMOS; capacitor bank; switched capacitor; ATU; reconfigurable matching; ITU}},
  language     = {{eng}},
  publisher    = {{SSoCC (Swedish System on Chip Conference)}},
  title        = {{Impedance Tuning Unit for DVB-H Front-End}},
  year         = {{2006}},
}