le005-r2 mode-uv linear transponder
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LE005-R2Mode-UV Linear Transponder
William Leijenaar,PE1RAH
William Leijenaar, PE1RAH
About myself:• Name :
• Callsign :
• Occupation :
• HAM interrest:
• Membership :
William Leijenaar
PE1RAH (The Netherlands)
RF Development EngineerNXP Semiconductors The Netherlands(CATV Hybride module designer)
Designing linear transponders for AMSATcommunity.
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 testingFeatures:
• 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 :
Output frequency :
Output power :
Supply voltage :
Current standby :
Current when DX :
Protections :
Size :
Weight :
Onboard CW Beacon :
Optional :
70cm (Frequency is programmable)
2m (Frequency is programmable)
+23dBm PEP (single tone)
+3.7Vdc
650mA
760mA
- Low voltage switch off
- High current fuse
9cm x 9cm x 0.5cm
< 30grams
Freq, Message, Power programmable
External ref osc, LNA tap, IF tap
William Leijenaar, PE1RAH
LE005-R2 small missions:The transponder weight < 30 grams
Balloon missions
Flying on kite
CubeSat projects
William Leijenaar, PE1RAH
LE005-R2 with higher output power:
M57727
PA Module
2m output 40W70cm input
LE005-R2
William Leijenaar, PE1RAH
LE005-R2 in U/S mode example:
V
S
2.3GHz output70cm input
2m to 13cm up-converter
LE005-R2
William Leijenaar, PE1RAH
Thank you for your interrest
Hope to meet you on the satellites
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