LE005-R2 Mode-UV Linear Transponder

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


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


My ham activities:

• Indian VO-52: Dutch transponder design

Launched May 2005

Operational in orbit


My ham activities:

• AMSAT-DL: P3e Mode-UV transponder design (100% tested and working, not selected SDR option)


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 **


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


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


LE005-R2 in detail:

Power supply = 3.7Vdc

- One cell Li-Ion

- E.g Cell-phone battery


LE005-R2 in detail:

Programming option:

- All frequencies

- Beacon message

- Beacon power

** MSP430 **


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


LE005-R2 in detail:Complete system example:


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


LE005-R2 small missions:The transponder weight < 30 grams

Balloon missions

Flying on kite

CubeSat projects


LE005-R2 with higher output power:

M57727

PA Module

2m output 40W70cm input

LE005-R2


LE005-R2 in U/S mode example:

V

S

2.3GHz output70cm input

2m to 13cm up-converter

LE005-R2


Thank you for your interrest

Hope to meet you on the satellites

LE005-R2 Mode-UV Linear Transponder

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