An Enhanced/PermanentAmateur Radio Station

Proposal

L. McFadin, W5DIDK. Banke N6IZW

http://www.ariss.org

• Uses an SDR transceiver and amplifiers to provide all modes and all bands.

• Modular design• Easily expandable• Portable• Dual/Cross Band capability• New software uploadable from ground• Mode/frequency selectable from ground

• Can be software based/controlled.• Requires Ipad for local user interface.• Can limit access to permitted bands via software• Can connect to ISS audio/video system• Can connect TNC’s, SSTV, Digital voice memory

modules,DATV, etc.• System suitable for DATV bandwidths.• Switch for manually selecting preset modes/freqs

• Modes– FM, SSB, packet, SSTV,DATV

• Uplink bands– 10m, 2m, 70cm, 23cm, 13cm

• Downlink bands– 10m, 2m, 70cm, 13cm

SDR Transmitter

SDR Receiver

Transmit Amplifiers

Receive Amplifiers

MicroprocessorSDR DSP andInterface Controller

RFSwitch

RFSwitch

Input AudioInterface

Output AudioInterface

Station AudioPacket SystemSSTV SystemOther

Station AudioPacket SystemSSTV SystemOther

Power Conditioner/IsolatorStation Power

Ipad UserInterface

Wireless Audio

Proposed overall Block Diagram

2.4 GHz LNA

1.2 GHz LNA

435 MHzLNA

29 MHz LNAUp converter

145 MHzLNA

Rx RF

SDR Radio70-6000 MHzReceiver

Audio Data

Serial ControlPort

Audio OutputInterface

Control Lines

RFSelectorSwitch

Interface Controller

To 29MHzCirculator

To 145 MHzCirculator

To 435 MHz Circulator

To 1.2 GHzAntenna

To 2.4 GHzCirculator

Proposed ISS Receiver Block Diagram

Proposed ISS Transmitter Block Diagram

2.4 GHzAmplifier

435 MHzAmplifier

145 MHzAmplifier

29 MHzDwn Conv 29 MHz

Amplifier

Tx RF

SDR Radio70-6000 MHzTransmitter

29 MHzAntenna

2.4 GHz Antenna

435 MHz Antenna

145 MHz Antenna

Control Lines

AudioData

Serial PortControl

Input AudioInterface

Interface Controller

RFSelectorSwitch

Bandpass Filter &Circulator

Bandpass Filter &Circulator

Bandpass Filter &Circulator

Bandpass Filter &Circulator

• Tasks– SDR Transmitter/Receiver module – RF switching & coupling module– Audio interface module– Controller interface module– Controller interface software– Packet software

• Tasks (continued)– Antennas – RF, power, & control penetrations– Power Supply– Internal & External wiring– Wireless remote station– Integration & configuration control

• Issues• funding• need to decide who does what (hardware, software, testing,

safety, etc.)• frequencies

• Summary– flexible, upgradeable, expandable– Meets all ARISS requirements and ISS specifications– promotes international participation