Download LE005-R2 Mode-UV Linear Transponder

LE005-R2
Mode-UV Linear Transponder
William Leijenaar,PE1RAH
About myself:
• Name
:
William Leijenaar
• Callsign
:
PE1RAH (The Netherlands)
• Occupation :
RF Development Engineer
NXP Semiconductors The Netherlands
(CATV Hybride module designer)
• HAM interrest:
Designing linear transponders for AMSAT
community.
• Membership :
Member of AMSAT-NA
William Leijenaar, PE1RAH
About Linear Transponders:
For user:
• Many users at same time
• Many modes (CW, SSB, FM, RTTY, SSTV……..)
– Different mode at the same time
For Satellite:
• Difficult to design (need great RF experience)
– Must be linear under every condition
•
More expensive to make
– Need special components (Crystal filters)
– Need many stages  Need many components
William Leijenaar, PE1RAH
My ham activities:
• Indian VO-52: Dutch transponder design
Launched May 2005
Operational in orbit
William Leijenaar, PE1RAH
My ham activities:
• AMSAT-DL: P3e Mode-UV transponder design
(100% tested and working, not selected  SDR option)
William Leijenaar, PE1RAH
My ham activities:
• LE002-R1
– VO-52 size Mode-UV Linear Transponder
- Difficult to make  many tuning
- Stability problems
- Not many launch options
 Only for bigger satellites
** Project has been stopped **
William Leijenaar, PE1RAH
My ham activities:
• LE005-R2
– CubeSat size Mode-UV Linear Transponder
Design criteria:
- Must fit single CubeSat size
- 3.7Vdc power supply
- Fully programmable
- Design with no tuning
William Leijenaar, PE1RAH
LE005-R2 in detail:
Total size 9cm x 9cm x 0.5cm
– (Included mounting strip)
Transponder in CubeSat model
-Transponder needs very small space
- Good secondary CubeSat payload
William Leijenaar, PE1RAH
LE005-R2 in detail:
Power supply = 3.7Vdc
- One cell Li-Ion
- E.g Cell-phone battery
William Leijenaar, PE1RAH
LE005-R2 in detail:
Programming option:
- All frequencies
- Beacon message
- Beacon power
** MSP430 **
William Leijenaar, PE1RAH
LE005-R2 in detail:
Demo board available:
For easy testing
Features:
• 5…15Vdc input voltage
• 3.7Vdc regulator included
• All connectors SMA
Demo board can also be use
as terrestrial transponder
For example on mountain
William Leijenaar, PE1RAH
LE005-R2 in detail:
Complete system example:
William Leijenaar, PE1RAH
LE005-R2 features:
Input frequency
: 70cm (Frequency is programmable)
Output frequency
: 2m
Output power
: +23dBm PEP (single tone)
Supply voltage
: +3.7Vdc
Current standby
: 650mA
Current when DX
: 760mA
Protections
: - Low voltage switch off
(Frequency is programmable)
- High current fuse
Size
: 9cm x 9cm x 0.5cm
Weight
: < 30grams
Onboard CW Beacon : Freq, Message, Power  programmable
Optional
: External ref osc, LNA tap, IF tap
William Leijenaar, PE1RAH
LE005-R2 small missions:
The transponder weight < 30 grams
CubeSat projects
Balloon missions
Flying on kite
William Leijenaar, PE1RAH
LE005-R2 with higher output power:
70cm input
2m output 40W
LE005-R2
M57727
PA Module
William Leijenaar, PE1RAH
LE005-R2 in U/S mode example:
2.3GHz
output
70cm input
LE005-R2
V
S
2m to 13cm
up-converter
William Leijenaar, PE1RAH
Thank you for your interrest
Hope to meet you on the satellites
William Leijenaar, PE1RAH