Low Cost Smart Antennas for Fixed and

surprisesameSemiconductor

Nov 1, 2013 (4 years and 7 days ago)

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Low Cost Smart Antennas
for Fixed
and
In
-
Motion
Satcom

Terminals

Greg
Mockett

Founder
& President

Karl
Warnick

Co
-
Founder
and Chief Scientist


Associate
Professor


Electrical
and Computer Engineering


Brigham
Young University







Sept 2010




CONFIDENTIAL

Ku Band
SmartLNBF
/BUC Phased Array Feed


Ku Band or Ka Band


D = 40 cm to 1.2 m


f/D = 0.4 to 0.8


G/T = 19 dB/K (Ku, 1 m reflector)


Polarization options:

Tx

h
-
pol
, Rx h/v
-
pol

RH/LHCP

30 dB XPD


Field of view options:

±
2 degrees


Mispointing

compensation

±

10 degrees by
±

2 degrees


Failover retargeting




FoV
:
±
2 degrees


±
10 degrees





Sept 2010




CONFIDENTIAL

ASIC Development Path


Ku band Rx/
Tx

chipset


samples November 2010


Ka band Rx/
Tx

chipset beginning design (early 2012
availability)


LSCX band Rx/
Tx

chipset designed (2011 availability)





Rx

Tx





Sept 2010




CONFIDENTIAL

Ku Band Beamformer Chipset


Ad
-
A
-
Beam™ = Adaptive
-
Analog
-
Beamformer


Digital control but analog process


Digital beamforming preferred . . . EXCEPT for cost


100 element array (if Digital)

500Mhz=1Gbps processing

1Gbps = $500 (?)

100Gbps = $50,000


100 element array (if Analog)

100 x $5 = $500


Broadband/Many
-
Element Sweet Spot

Satcom

Radar

Broadband Wireless


Volume driving design







Sept 2010




CONFIDENTIAL

Ku Band Beamformer Chipset


Rx chip:

Eight RF inputs, independent 3 bit phase shifters and VGAs

One RF beam output


Tx

chip:

One RF input, eight RF beam outputs, PA for each element


Low per
-
element cost makes phased arrays economical for commercial
applications


On
-
chip 2
nd

stage LNA reduces gain requirement for off
-
chip front end LNA
or allows direct element feeding


Broadband

analog

design


Low

power

consumption

for

mobile

applications


Receive and transmit beamformer chipset for bidirectional arrays allows
shared or separate
Tx

and Rx apertures


Overvoltage

protection

on

all

RF

pins


Die

size

4
.
8

mm

x

2
.
4

mm






Sept 2010




CONFIDENTIAL

Ku Band Rx Chip Functional Diagram





Sept 2010




CONFIDENTIAL

Ku Band
Tx

Chip Functional Diagram





Sept 2010




CONFIDENTIAL

Ku Band Beamformer Specifications (Rx)

Address High


3.3 V

Address Low

0 V

Gain/Phase Control High

3.3 V

Gain/Phase Control Low

0 V

Control Line Bandwidth

10 MHz

RF
Input/Output

Frequency

10
-

13 GHz

RF Input/Output Impedance

50


Gain (One RF IN To RF OUT)

At Maximum VGA Setting

13 dB

VGA Gain Range

0 dB to 12 dB

Gain Settling Time

1 μs

Gain Stability Over Temperature

0.015 dB/
°
C

Gain Flatness Over Any 50 MHz
Bandwidth

0.2 dB

Gain Stability Over Phase States

±
1 dB

Phase Range

360
°

Phase Settling Time

1 μs

Phase Stability Over Temperature

0.1
°
/
°
C

VGA Phase Stability

0.1
°
/dB

Maximum Phase Length Difference
Over All Eight RF Signal Paths

2
°

Group Delay Flatness Over Any 50
MHz bandwidth

50 ps

RF Input VSWR

1.8:1

RF Output VSWR

1.5:1

Noise Figure

3 dB

Maximum RF signal crosstalk

20 dB

Intermodulation Distortion

-
60 dBc

P1dB at LNA Output

0
dBm

RF Specifications

Digital Control Inputs

Supply Voltages

1.8 V, 3.3 V

Power Consumption

600
mW

DC Specifications

Thermal Specifications:

Continuously operable without heat sinking over
ambient temperature range
-
30


C to 50

C.






Sept 2010




CONFIDENTIAL

Ku Band
Tx
/Rx Layouts

Flipchip

in BGA package





Sept 2010




CONFIDENTIAL

LSCX Receiver


4 bit gain control and 4 bit phase control





Sept 2010




CONFIDENTIAL

LSCX Receiver

DC Specifications

Supply Voltages

TBD

DC Supply Power At
Maximum RF Output
Power

100 mW

RF Specifications

RF Input/Output Frequency

0.8

to 12 GHz

RF Input/Output Impedance

50 Ω

Gain (RF IN to One RF OUT)

At Maximum VGA Setting

20

dB

VGA Gain Range

20

dB

Number of Gain States

16 (4 bit control)

Gain Settling Time

1
0

n
s

Gain Stability Over Temperature

0.01 dB/
°
C

Gain Flatness Over Any 50 MHz
Bandwidth

0.2 dB





Sept 2010




CONFIDENTIAL

Gain Stability Over Phase States

±
1 dB

Phase Range

360
°

Number of Phase States

16 (4 bit control)

Phase Settling Time

1
0

n
s

Phase Stability Over Temperature

0.
02
°
/
°
C

VGA Phase Stability

0.1
°
/dB

Maximum Phase Length Difference
Over All Eight RF Signal Paths

1
°

Group Delay Flatness Over Any 50
MHz bandwidth

50 ps

RF Input VSWR

1.5:1

RF Output VSWR

1.5:1

Noise Figure

1.5

dB

Maximum RF signal crosstalk

20 dB

Intermodulation Distortion

-
60 dBc

Output Power for 1 dB
Compression (OP1dB)

8 dBm

Output Third Order Intercept (OIP3)

1
8 dBm

LSCX Receiver





Sept 2010




CONFIDENTIAL

Ka Band Chip Functional Diagram (Rx)





Sept 2010




CONFIDENTIAL

Ka Band Preliminary Specifications (Rx)

RF
Input/Output

Frequency

17 to 23 GHz

RF Input/Output Impedance

50


Gain (One RF IN to RF OUT)

At Maximum VGA Setting

16 dB

VGA Gain Range

20 dB

Number of Gain States

16 (4 bit control)

Gain Settling Time

10 ns

Gain Stability Over Temperature

0.015 dB/
°
C

Gain Flatness Over Any 100 MHz
Bandwidth

0.2 dB

Gain Stability Over Phase States

±
1 dB

Phase Range

360
°

Number of Phase States

16 (4 bit control)

Phase Settling Time

10 ns

Phase Stability Over Temperature

0.04
°
/
°
C

VGA Phase Stability

0.1
°
/dB

Maximum Phase Length Difference
Over All Eight RF Signal Paths

1
°

Group Delay Flatness Over Any 100
MHz bandwidth

50 ps

RF Input VSWR

1.5:1

RF Output VSWR

1.5:1

Noise Figure

3 dB

Maximum RF Signal Crosstalk

20 dB

Intermodulation Distortion

-
60 dBc

Output Power for 1 dB Compression
(OP1dB)

8 dBm

Output Third Order Intercept (OIP3)

18
dBm

RF Specifications

Thermal Specifications:

Continuously operable without heat sinking over
ambient temperature range
-
30


C to 85

C.






Sept 2010




CONFIDENTIAL

Phased Array Tile Modules


Integrated module built
around 1
-
4+ beamformer
chips


Tile size:

4 x 2 (dual polarization)

8 x 2


two chips

16 x 2


four chips


Interconnects:

Beamformer control
(digital)

RF (
equiphase
)

Power








Sept 2010




CONFIDENTIAL

Linear Signal Development Teams


Washington State University

Analog, RF, and Mixed signal Application Group (ARMAG)

Center for Design of Analog
-
Digital Integrated Circuits (CDADIC)

Prof.
Deuk

Heo

RFIC design and layout



Brigham Young University

Center for Smart Antenna Systems (CSAS)

Prof. Karl
Warnick

Phased array antenna design and systems engineering



Other Partners/Collaborators

Antenna stabilization platform

RF ASIC design consultants

Maxtex
,
FlipChip

Inc. (chip packaging)

Phased array tile IP (patent pending)




CSAS





Sept 2010




CONFIDENTIAL

Linear Signal Development Teams









Sept 2010




CONFIDENTIAL

CSAS Phased Array Research


10 years of continuous National Science Foundation funding for signal
processing and phased array antenna research for radio astronomy


First demonstration of astronomical image formation using an L
-
band
phased array on the Green Bank 20
-
Meter Telescope


First demonstration of adaptive interference cancellation using a
phased array feed


Lowest system temperature and highest sensitivity ever measured for
a microwave phased array


Current projects:

Focal L
-
band Array Feed for Green Bank Telescope (FLAG)

Phased Array Feed feasibility study for Arecibo Radio Telescope

Cryogenic phased array feeds

Real time broadband multichannel digital signal processing

Phased array antennas and phased array feeds for
Satcom

Phased arrays for magnetic resonance imaging (MRI)








Sept 2010




CONFIDENTIAL

Contact Info

Linear Signal, LLC


86 N University Ave, Suite #400

Provo, Utah 84601


Phone: 801
-
337
-
9100

Fax: 815
-
301
-
3687


http://www.linearsignal.com

info@linearsignal.com