Paper A Power Efficient BiCMOS Ka-Band Transmitter Front-End … 1 day ago · "A Modular...
Transcript of Paper A Power Efficient BiCMOS Ka-Band Transmitter Front-End … 1 day ago · "A Modular...
Th2G-3
A Power Efficient BiCMOS Ka-Band
Transmitter Front-End for SATCOM
Phased-Arrays
S. Rasti-Boroujeni, A. Wyrzykowska, M. Mazaheri, A. Palizban, S. Ituah, A. El-Gouhary, G. Chen, H. Gharaei-
Garakani, M. Nezhad-Ahmadi, S. Safavi-Naeini
University of Waterloo, Waterloo, Canada
Student
Paper
Finalist
Th2G-3
• Motivation and Background
• Proposed Solution
• Circuit Implementation
• Measurement Results
• Conclusion
2
Outline
Th2G-3 3
Mobile SATCOM
Courtesy of Telesat
• Broadband in-flight internet access.
• Hundreds of satellite form a constellation at LEO for a global
connectivity.
Th2G-3
• Fast Beam-Steering
• Conformal and Low Profile
• Polarization Control
• Controlled Radiation Mask
• Affordable Power Consumption
4
Mobile SATCOM Requirements and
Challanges
VS
Th2G-3
• More than 4000 dual-polarized antenna elements is
needed.
• Power consumption of existing SATCOM beam-former
solutions > 500-700 W
• Our Goal is to reduce the power consumption to below
200 W for a 4000 elements dual-polarized array for 48
dBW EIRP.
5
Motivation and Background
Th2G-3
• Modular phased array configuration is a highly flexible
and cost-effective solution for large phased arrays.
• 1024 elements active phased arrays is developed with
this method [1].
6
Modular Scalable Phased Arrays
2 cm
2 cm
[1] W. M. Abdel-Wahab et al., "A Modular Architecture for Wide Scan Angle Phased Array Antenna for K/Ka Mobile SATCOM," 2019
IEEE MTT-S International Microwave Symposium (IMS), Boston, MA, USA, 2019, pp. 1076-1079
Th2G-3 7
Summary of CIARS Active Phased Array
Development
This Work
Th2G-3 8
Circuit Implementation
• GF-BiCMOS 0.13 µm with ft / fMax of 250/340 GHz is used.
• The TX channel is designed for a 4000 elements phased-array
antenna. OP1dB=11dBm
• The architecture is designed for independent amplitude and phase
shift control.
Th2G-3 9
Circuit Implementation
-2 to -17 dB
Gain Control
-4 dB
1-bit phase
inverter
16 dB
Fixed Gain
Stage
-9 to -7 dB
Reflective
Type Phase
Shifter
23 dB-38%
Peak PAE
Two Stage
Power Amplifier
Th2G-3 10
Measurement Results-Small Signal
• 3dB bandwidth from 27.5 to 31.5 GHz
• 15 dB gain control
• ± 5 degree phase error
Th2G-3 11
Measurement Results-Small Signal
• 200 degree continuous phase control.
• 1-bit 180 degree phase inverter.
• ±1.1 dB amplitude variation @ 30 GHz
Th2G-3
• Amplitude-Phase variation over the bandwidth.
12
Measurement Results-Small Signal
27 GHz 28 GHz 29 GHz 30 GHz
Th2G-3 13
Measurement Results-Large Signal
• TX channel PAE and P1dB over frequency at nominal
supply voltage of 1.8 V
Th2G-3 14
Measurement Results-Large Signal
• Thousands of elements operate in deep back-off in
large phased arrays.
• Adaptive supply is used to enhance the efficiency at
back-off.
Th2G-3
• 12% average efficiency for a 300MS/s 64QAM signal at 30
GHz.
15
Measurement Results-Large Signal
Th2G-3
Technology PackageN
Channels
Freq.
(GHz)
𝑷𝟏𝒅𝑩/𝑷𝒔𝒂𝒕(𝒅𝑩𝒎)
Gain
(dB)
𝑷𝑫𝑪/𝑪𝒉.
(mW)
PAE
@ 𝑷𝟏𝒅𝑩
Gain Control
(dB)
Phase
Res.
This Work
U-Waterloo
130nm-
SiGe8xp- 1-TX 27-31 10.8/12 23 45 26.7 15
Continu
ous
Anokiwave - QFN 8-TX27.5-
3012/- 22 112.5 14 32x0.5 5 bits
Anokiwave - WLCSP 8-TX27.5-
318/- 20 - - 32x0.5 6 bits
University of
Ulm
250nm-SiGe- 2TX-1RX
29.5-
30.8
12.9/15
.337.7 81 19.5 30 8 bits
Qualcomm 28nm-CMOS - 24-TRX26.5-
29.512/14 44 122 13 8x1 3 bits
Qualcomm -
TAMU40nm-CMOS - 1-TRX 27-30 14.6/15 12.4 137 21 9x1 3 bits
IBM130nm-
SiGe8hp- 32-TRX
27.2-
28.713.6/16 30 144 15.9 8x1 5 bits
UCSD 180nm-SiGe - 4-TRX 28-32 11/13 19 220 5.7 20 6 bits
16
Performance ComparisonS
AT
CO
M5
G
Th2G-3
• A power-efficient RF front-end for Ka-Band SATCOM
phased array transmitter is presented.
• Peak PAE of 27% is achieved for OP1dB of 11.5 dBm.
• 400 degree phase and 15 dB gain control is achieved.
• Adaptive supply is employed to enhance efficiency.
• Achieving 200 W of DC Power for a 4000 elements array
is feasible with the implemented solution.
17
Conclusion