STEMlab RED PITAYA SDR Transceiver Build Part 2

Now that the Stemlab Red Pitaya 125-14 module has been modified for use as an SDR (software defined radio), it is time to design and build a front end module with filtering, RF amplification and digital attenuation.

The Red Pitaya board has very wideband, high-speed ADC's that will digitize everything from DC up to tens of MHz and while this is desirable for a software-defined radio receiver, it is not without some downsides.

Band Pass Filtering For The G6LBQ Irwell HF Transceiver Part 3

 For part 1 of the BPF module click here.

For part 2 of the BPF module click here.

HF Transceiver - Band Pass Filter Module

"High Performance RF Band Pass Filtering For The G6LBQ Irwell HF Transceiver"

In this blog post, I conclude the development of my high performance RF Band-Pass Filter suitable for the Irwell HF Transceiver as well as SDR receivers and other transceiver builds.

Band Pass Filtering For The G6LBQ Irwell HF Transceiver Part 2

For part 1 of the BandPass Filter click here.

HF Transceiver - Band Pass Filter Module

"High Performance RF Band Pass Filtering for the G6LBQ Irwell HF Transceiver"

Band Pass Filtering For The G6LBQ Irwell HF Transceiver Part 1

 

HF Transceiver - Band-Pass Filter Module

"High Performance RF Band Pass Filtering for the G6LBQ Irwell HF Transceiver"

In this blog post, I lay the foundations for a high-performance RF Band Pass Filter  suitable for the Irwell HF Transceiver as well as SDR receivers and other transceiver builds.

For my own transceiver project, the filter module needs to meet the following criteria:

• Have a sufficient number of filters to enable general coverage reception of 0.5MHz to 30MHz and provide uniform high performance for any given frequency within this range.
  
  
• Be usable on the transmit path with a rf power handling rated at 1 watt.
  
  
• Provide good suppression to frequencies that fall below or above the desired frequency pass band.
  
  
• Provide low insertion loss within the wanted pass band & good return loss.