A wideband and broadband radio-frequency bidirectional coupler with power divider/combiner functionality (200A, 200B, 300, 400A, 400B, 400C) for signals with frequency reaching up to 300 GHz, comprising:
- a free propagation region substrate (210) with a pair of opposed edges (240A, 240B);
- a first group of access ports (P-L1-P-LM) established along a first edge (240A) of said pair of opposed edges (240A, 240B);
- and
- a second group of access ports (P-R1-P-RM) established along a second edge (240B) of said pair of opposed edges (240A, 240B), wherein the first and second groups of access ports (P-L1-P-LM), (P-R1-P-RN) comprise:
- dielectric waveguide structures (DW-L1-DW-LM), (DW-R1-DW-RN) providing a high-pass filter transfer function operating over a high frequency range starting from a low cut-off frequency fez in the microwave range or in the millimeter-wave range.