Just finished copper plating my 3D printed 8 GHz dual mode feed ! I plan on using it for X-Band weather sat reception. This is a down-scaled / resimulated version of the 1296 MHz W2IMU/N2UO dual mode septum feed.
Experimenting with S/X feeds, now replacing the S band patch with a precisely cut FR4 board . The ground plane has the phasing circuit on the back. All feeds below employ 3-point sequential feeding. Showing two single pol (L and R) feeds and a dual simutaneous L+R one.
Working on a dual S/X feed supporting simultaneous RHCP/LHCP RX . There are 2x S band BPFs, 2x LNAs connected to Lime's Ch1/Ch2. A simple GRC flowgraph streams over UDP to 2 SatDump instances.
The coupler/120 deg phase shifter has been based on Maarten Baert's inspiring work.
Working on a dual S/X feed supporting simultaneous RHCP/LHCP RX . There are 2x S band BPFs, 2x LNAs connected to Lime's Ch1/Ch2. A simple GRC flowgraph streams over UDP to 2 SatDump instances.
The coupler/120 deg phase shifter has been based on Maarten Baert's inspiring work.
@uhf_satcom Thanks! Yes a septum , X band is pretty straightforward as I have already been using an L/X feed. The goal here was to have both polarizations simultaneously R/L on S band.
Experimental HRPT 1.7 GHz setup with a simple honey-can feed and 2 probes for linear orthogonal polarization.
Then V/H components are combined in a GNU Radio flowgraph to form RHCP/LHCP.
There are sliders to adjust gain and phase differences.