QWS - Quarter-Wavelength Stub
The QWS Series from NexTek offers robust, always-on protection for RF systems operating at high frequencies. These coaxial surge protectors utilize a quarter-wavelength stub design to short high-energy transient events—such as ESD, EMP, and lightning-induced surges—directly to ground, while allowing uninterrupted signal flow during normal operation. Unlike gas discharge tube-based devices, QWS units are inherently broadband and maintenance-free, with no components to wear out or degrade over time.
Engineered for systems where DC pass-through is not required, the QWS line is especially suited for mission-critical applications where performance and reliability are non-negotiable. These arrestors maintain low insertion loss across their operating bandwidth and exhibit excellent return loss characteristics, preserving the integrity of sensitive RF signals even in the most demanding environments.
Available in a compact, inline form factor with N-type connectors, QWS models cover operating frequencies from 2.2 GHz to 18 GHz — supporting a broad range of applications in commercial wireless, aerospace, military communications, and satellite infrastructure. For engineers and system designers seeking long-term protection with zero maintenance and high-frequency transparency, QWS surge protectors offer a powerful and proven solution.
*example product shown
Connector Types
- N-Type
Frequency Range
- 2.200 – 18 GHz
Threat Types
- ESD
- EMP
- LEMP
Design Highlights
- Quarter Wavelength Stub
Applications for QWS Quarter-Wavelength Stub
Quarter-Wavelength Stub (QWS) arrestors are ideal for protecting high-frequency RF systems where reliability, low maintenance, and minimal signal interference are critical. Their always-on, DC-blocked design makes them a preferred solution for mission-critical communications, radar, and satellite applications. These protectors are especially suited for environments that demand wideband performance and immunity to EMP, ESD, or other fast transient events, such as defense platforms, test equipment, and broadband antenna systems.
QWS Quarter-Wavelength Stub Products
NexTek offers several QWS models to suit a range of RF performance requirements. All utilize a T-style form factor for convenient retrofit or integration, and deliver ultra-fast protection with minimal insertion loss.
Here is a selection of available products in the QWS family:
- QWSNFNM0600: Quarter‑wave stub, N‑Female to N‑Male, wideband design
- QWSNFNM0500: Quarter‑wave stub, N‑Female to N‑Male, extended frequency range
- QWSNFNF0600: Quarter‑wave stub, N‑Female to N‑Female, wideband design
- QWSNFNF0500: Quarter‑wave stub, N‑Female to N‑Female, extended frequency range
Each product combines excellent RF characteristics with rugged protection against transient threats, without aging or requiring regular replacement.
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