It is well-known that filter is an essential component in wireless communication systems.
Recently the development of wireless communication systems requires a compact and …

The substrate integrated waveguide (SIW) has been proposed as a reliable alternative to the
rectangular waveguide due to its small size, low cost, high performance, ease of …

Designing a filter with desired characteristics is made easy. A filter (1) includes a plurality of
resonators (10 to 50) which are electromagnetically coupled. The plurality of resonators (10 …

Abstract A diplexer (100) includes: first and second directional couplers (106A, 106B); and
first and second filters (101A, 101B). The filters (101A, 101B) each include a plurality of …