Abstract
| Original language | English |
|---|---|
| Pages (from-to) | 735-746 |
| Number of pages | 12 |
| Journal | IEEE journal of solid-state circuits |
| Volume | 52 |
| Issue number | 3 |
| DOIs | |
| State | Published - 4 Jan 2017 |
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Keywords
- EWI-26902
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A Beamformer with constant-gm vector modulators and its spatial intermodulation distortion. / Soer, M.C.M.; Klumperink, Eric A.M.; van den Broek, Dirk-Jan; Nauta, Bram ; van Vliet, Frank E.
In: IEEE journal of solid-state circuits, Vol. 52, No. 3, 04.01.2017, p. 735-746.Research output: Scientific - peer-review › Article
TY - JOUR
T1 - A Beamformer with constant-gm vector modulators and its spatial intermodulation distortion
AU - Soer,M.C.M.
AU - Klumperink,Eric A.M.
AU - van den Broek,Dirk-Jan
AU - Nauta,Bram
AU - van Vliet,Frank E.
PY - 2017/1/4
Y1 - 2017/1/4
N2 - Spatial interference rejection in analog adaptive beamforming receivers can improve the distortion performance of the circuits following the beamforming network, but is susceptible to the non-linearity of the beamforming network itself. This paper presents an analysis of intermodulation product cancellation in analog active phased array receivers and verifies the distortion improvement in a 4-element adaptive beamforming receiver for low power applications in the 1.0 to 2.5 GHz frequency band. In this architecture, a constant-Gm vector modulator is proposed which produces an accurate equidistance square constellation, leading to a sliced frontend design that is duplicated for each antenna element. By moving the transconductances to RF, a four-fold reduction in power is achieved, while simultaneously providing input impedance matching. The 65-nm implementation consumes between 6.5 and 9 mW per antenna element, and shows a +1 to +20 dBm in-band, out-of-beam IIP3 due to intermodulation distortion reduction.
AB - Spatial interference rejection in analog adaptive beamforming receivers can improve the distortion performance of the circuits following the beamforming network, but is susceptible to the non-linearity of the beamforming network itself. This paper presents an analysis of intermodulation product cancellation in analog active phased array receivers and verifies the distortion improvement in a 4-element adaptive beamforming receiver for low power applications in the 1.0 to 2.5 GHz frequency band. In this architecture, a constant-Gm vector modulator is proposed which produces an accurate equidistance square constellation, leading to a sliced frontend design that is duplicated for each antenna element. By moving the transconductances to RF, a four-fold reduction in power is achieved, while simultaneously providing input impedance matching. The 65-nm implementation consumes between 6.5 and 9 mW per antenna element, and shows a +1 to +20 dBm in-band, out-of-beam IIP3 due to intermodulation distortion reduction.
KW - EWI-26902
U2 - 10.1109/JSSC.2016.2639545
DO - 10.1109/JSSC.2016.2639545
M3 - Article
VL - 52
SP - 735
EP - 746
JO - IEEE journal of solid-state circuits
T2 - IEEE journal of solid-state circuits
JF - IEEE journal of solid-state circuits
SN - 0018-9200
IS - 3
ER -