| Power Combiners, Impedance Transformers and Directional Couplers: Part I - IV Andrej Grebennikov |
| Power Combiners, Impedance Transformers and Directional Couplers: Part I https://www.researchgate.net/profile/Andrei-Grebennikov/publication/264047867_Power_combiners_impedance_transformers_and_directional_couplers_part_I/links/0f31753cc37a6c6c40000000/Power-combiners-impedance-transformers-and-directional-couplers-part-I.pdf |