High Gain, Linear, Low Cost Digitally Controlled VHF-UHF Analog Transponder for Nano Satellites

Ceylan O., Ozen O. E. , Canbey H. H. , Cam Z. G. , Yağcı H. B.

3rd Asia-Pacific Microwave Conference Proceedings (APMC), Seoul, Güney Kore, 5 - 08 Kasım 2013, ss.1027-1029 identifier identifier

  • Yayın Türü: Bildiri / Tam Metin Bildiri
  • Doi Numarası: 10.1109/apmc.2013.6695013
  • Basıldığı Şehir: Seoul
  • Basıldığı Ülke: Güney Kore
  • Sayfa Sayıları: ss.1027-1029


Nano satellites are generally developed by universities for scientific researches because of low design cost and time. On the other hand a nano satellite has small power and limited volume; therefore there are several restrictions for circuit design. In this project, a digitally controlled VHF to UHF analog transponder is presented for nano satellites. System has -115 dBm receive sensitivity. Output power is 1W at 437.225 MHz with +/-35 kHz narrow bandwidth. Transponder is controlled by a microcontroller to keep output power stable as 30 dBm (1W) with +/-1.5dB ripple. Circuit size is 9x9 cm(2) and includes a metal shield. System was tested under space conditions such as vacuum and very high temperature changes. System is pin to pin compatible with other commercial nano satellite devices' bus structures.