This presentation on training engineers on Thales 300/100 kW new generation solid state MW Transmitters.

1. Evolution of High power AM transmitter technology
and
Comparison of type S7HP and TMW2100 transmitters

2. AM-DSB modulation in communication
 AM is the least efficient mode of
communication
 Hence, the process of generation of high
power AM-DSB signals needs to be highly
efficient

3. Evolution of AM Transmitter technology
 Class-C PA and Class-B modulator using triodes
 Class-D PA and Class-B modulator using
tetrodes
 PSM modulator using GTOs replaces Class-B
modulator
 Dynamic carrier control for electrical energy
saving
 MOSFET as high speed switching element and
DSP to implement the switching algorithm

4. Connection topology of RF modules in
series
DSPem
Ec

5. Connection topology of RF modules in parallel

6. Connection topology of RF modules in series || parallel

7. Comparison of the topology
S E R IA L P A R A L L E L M IX E D
O P E R A T IO N
M O D U L E V O L T A G E A D D E D
S A M E C U R R E N T
M O D U L E C U R R E N T A D D E D
S A M E V O L T A G E
M O D U L E V O L T A G E A N D
C U R R E N T
A D D E D A N D C O M B IN E D
S T A B IL IT Y W IT H O N E O R
M O R E M O D U L E O U T O F
O R D E R
S T A B L E
P O W E R D E C R E A S E S
U N S T A B L E
P O W E R R E M A IN S C O N S T A N T
S T A B L E U N D E R C O N D IT IO N
S M A L L U N B A L A N C E D V O L T A G E
D IF F E R E N C E
D IS A B L E D M O D U L E
M O D U L E F A U L T A L L O W E D
S H O R T - C IR C U IT
T H E N O R M A L T R A N S IS T O R
F A IL U R E M O D E
O P E N C IR C U IT
N E E D A D D IT IO N A L
P R O T E C T IO N
S H O R T C IR C U IT L IM IT E D
N U M B E R O F F A U L T Y M O D U L E
L IM IT E D
L IM IT A T IO N
H IG H V O L T A G E L IN E L E N G T H
L O A D V A R IA T IO N
H IG H C U R R E N T
L O W IM P E D A N C E
IN C R E A S E D L O S S E S
V O L T A G E A N D
C U R R E N T C O M B IN E D
T H O M C A S T S O L U T IO N
1 2 0 T O 1 6 0 M O D U L E S
IN S E R IA L
1 5 0 k W
N IL
2 L IN E S O F 1 2 8 M O D U L E S IN
S E R IA L
4 0 0 k W
P H A S E V A R IA T IO N A L L O W E D F O R B ID D E N A L L O W E D

8. Comparison of S7HP and TMW 2100

9. Similarities in S7HP and TMW 2100
 The electronic designs are very much similar
 Solid state modules are used in RF power building
 Uses MOSFETs as high speed Switching devices in a
H-bridge configuration for developing the final RF power
 Uses DSP processors for implementing the algorithms for
module switching, thermal balancing, rotation etc
 No hot plugging of PA modules
 Uses phase modulation to get fine envelope
 Control through MMI, remote terminal etc
 Boards are not inter-changeable
 Built in DCC
 DRM ready

10. Differences in S7HP and TMW 2100
PA connection
topology
Series – parallel Series
Cooling Water and air Air
Phase control 7 Dedicated PAs All PAs
Signal
distribution
Through
distribution
board one each
for 16 modules
Through
distribution
board one for
block of each 5
modules

11. Differences in S7HP and TMW 2100
Power output of each
module 2.34 kW 1.25 kW
Number of PAs 255 80
PA Module monitoring
Through fuse
status
Through fuse
status and
differential phase
of I/P and O/P
signals
Power build up
239 CSM
controlled PA
All 80 are CSM cum
phase controlled

12. 5 kW Power pack of TMW2100

13. Schematic of PA used in TMW 2100

14. Timing diagram of the control signals fc+
and fc-
in
PA module of TMW 2100

15. Schematic of PA used in S7HP