Suspended Substrate Stripline RF Filters
Suspended Substrate Stripline (SSS) is a printed circuit board topology that can be used for RF filter applications ranging in frequency from 500 MHz to 28 GHz.
This bandwidth is suitable for high and low pass filters that can be combined to form broadband filters and multiplexers. These designs result in highly selective band edges, low insertion loss and a broad range of impedance values.
In addition, the SSS technology provides very repeatable performance characteristics. This is mechanically achieved by compressing a double sided printed circuit board between two metallic planes with air cavities.
Due to the shielded structure, RF leakage is minimized, package size and cost is reduced. High power applications can be realized using machined conductive metal and either air or Teflon material in place of the printed circuit board copper and substrate.