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Inductorless LNA and Harmonic-rejection Mixer for Wideband Direct-conversion Receiver

Chu, Anh LU (2015) EITM02 20142
Department of Electrical and Information Technology
Abstract
In this master thesis, combinations of noise-canceling LNA and harmonic-rejection
mixers are investigated and compared to find an optimal inductorless receiver
front-end for low-band (600-960MHz) FDD LTE-A network. The work was carried
out in a modem development project at Ericsson Modems, Lund. Three receiver
versions with different harmonic rejection techniques are compared in terms of
noise figure (NF) and power consumption and the receiver with 6 LO phases is
selected for optimization. The LNA combines noise cancellation for matching stage
and nonlinearity cancellation for output stages so both low noise figure and high
linearity are achieved.
The final circuit show great potential for FDD LTE-A system with support up
to 3... (More)
In this master thesis, combinations of noise-canceling LNA and harmonic-rejection
mixers are investigated and compared to find an optimal inductorless receiver
front-end for low-band (600-960MHz) FDD LTE-A network. The work was carried
out in a modem development project at Ericsson Modems, Lund. Three receiver
versions with different harmonic rejection techniques are compared in terms of
noise figure (NF) and power consumption and the receiver with 6 LO phases is
selected for optimization. The LNA combines noise cancellation for matching stage
and nonlinearity cancellation for output stages so both low noise figure and high
linearity are achieved.
The final circuit show great potential for FDD LTE-A system with support up
to 3 aggregated carriers for higher bandwidth. Low NF at 1.62 dB after the LNA
and 1.75 dB after the mixer are observed from 0.4-1GHz. The LNA IIP2 is above
12 dBm and robust with process and temperature. Gain switching with possible
reduction of 6 and 12 dB is integrated and the LNA linearity is not significantly
suffered by low gain. Input return loss (S11) is better than -12dB regardless of
gain, number of carriers and temperature (-30 – 110°C). Inductorless operation
saves a lot of chip area and avoid dead package area, which then save cost and
make the solution competitive. (Less)
Popular Abstract
This master’s thesis done at Ericsson Modem aimed to investigate an inductorless receiver front-end for low-band LTE-A user terminals. The circuit combined noise-canceling technique and push-pull stage for LNA and harmonic-rejection technique for mixer, so three main issues of inductorless operation are solved. The issues include LNA noise and linearity, and noise folding effect caused by 3rd harmonics of LO signals.
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author
Chu, Anh LU
supervisor
organization
course
EITM02 20142
year
type
H2 - Master's Degree (Two Years)
subject
keywords
Ericsson, inductorless, harmonic-rejection, Noise-cancelling LNA, Mixer, LNA, Receiver, LTE-A, 4G Network
report number
LU/LTH-EIT 2015-429
language
English
id
7454707
date added to LUP
2015-09-23 07:57:24
date last changed
2015-09-23 07:57:24
@misc{7454707,
  abstract     = {In this master thesis, combinations of noise-canceling LNA and harmonic-rejection
mixers are investigated and compared to find an optimal inductorless receiver
front-end for low-band (600-960MHz) FDD LTE-A network. The work was carried
out in a modem development project at Ericsson Modems, Lund. Three receiver
versions with different harmonic rejection techniques are compared in terms of
noise figure (NF) and power consumption and the receiver with 6 LO phases is
selected for optimization. The LNA combines noise cancellation for matching stage
and nonlinearity cancellation for output stages so both low noise figure and high
linearity are achieved.
The final circuit show great potential for FDD LTE-A system with support up
to 3 aggregated carriers for higher bandwidth. Low NF at 1.62 dB after the LNA
and 1.75 dB after the mixer are observed from 0.4-1GHz. The LNA IIP2 is above
12 dBm and robust with process and temperature. Gain switching with possible
reduction of 6 and 12 dB is integrated and the LNA linearity is not significantly
suffered by low gain. Input return loss (S11) is better than -12dB regardless of
gain, number of carriers and temperature (-30 – 110°C). Inductorless operation
saves a lot of chip area and avoid dead package area, which then save cost and
make the solution competitive.},
  author       = {Chu, Anh},
  keyword      = {Ericsson,inductorless,harmonic-rejection,Noise-cancelling LNA,Mixer,LNA,Receiver,LTE-A,4G Network},
  language     = {eng},
  note         = {Student Paper},
  title        = {Inductorless LNA and Harmonic-rejection Mixer for Wideband Direct-conversion Receiver},
  year         = {2015},
}