PE1RAH
P3e MODE-UV
Final
Transponder Design
On this
webpage I show some pictures of the MODE-UV transponder what I made for P3e of
AMSAT-DL.
The MODE-UV
transponder has a RX and TX PCB.
The RX PCB:
Input : Lineair (all mode) 70cm UHF
Output : 2x 10,7MHz IF wide-band for command radio and
RUDAK uplinks.
: 2x 10,7MHz IF narrow band (100kHz)
for transponder use (downlinks on 2m and 13cm)
Extra : AGC circuit and radar protection circuit
The TX PCB:
Input : 4x 10,7MHz IF è from: RUDAK, Beacon, 70cm RX, 10m RX
Output : 2m VHF è Split into a phase (10mW) and envelope
(amplitude) signal for the HELAP PA.
To have
more experiments on board of the P3e satellite space is needed and therefor the
transponder has been designed to be very small in size. This has been done by
using SMD technology. The components used are 95% 0805 size SMD’s.
The
inductors are self-wound 5mm type to keep height as minimum as possible.
Because of the small component height, the RX and TX PCBs can be mount on top
off eachother and still fit into a 3cm high box.
The design
has been made 3D small sized J
Below some
pictures of the transponder PCB’s:
A picture
of the two flight model PCB’s on my working table. (2x TX PCB, 2x RX PCB)
A close-up
view
Top view of
one MODE-UV transponder
Bottom view
of one MODE-UV transponder
73 de PE1RAH, William Leijenaar
73 de PE1RAH, William Leijenaar.
E-mail: [email protected]il.com