An Enhanced/Permanent Amateur Radio Station Proposal L. McFadin, W5DID K. Banke N6IZW

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 Microprocessor SDR DSP and Interface Controller RF Switch RF Switch Input Audio Interface Output Audio Interface Station Audio Packet System SSTV System Other Station Audio Packet System SSTV System Other Power Conditioner/ Isolator Station Power Ipad User Interface Wireless Audio Proposed overall Block Diagram

2.4 GHz LNA 1.2 GHz LNA 435 MHz LNA 29 MHz LNA Up converter 145 MHz LNA Rx RF SDR Radio MHz Receiver Audio Data Serial Control Port Audio Output Interface Control Lines RF Selector Switch Interface Controller To 29MHz Circulator To 145 MHz Circulator To 435 MHz Circulator To 1.2 GHz Antenna To 2.4 GHz Circulator Proposed ISS Receiver Block Diagram

Proposed ISS Transmitter Block Diagram 2.4 GHz Amplifier 435 MHz Amplifier 145 MHz Amplifier 29 MHz Dwn Conv 29 MHz Amplifier Tx RF SDR Radio MHz Transmitter 29 MHz Antenna 2.4 GHz Antenna 435 MHz Antenna 145 MHz Antenna Control Lines Audio Data Serial Port Control Input Audio Interface Interface Controller RF Selector Switch 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