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RF Filters
Low Pass, High Pass, Band Pass, Band Reject/Notch
Bredengen offers a complete and extensive range of RF filters from RLC Electronics and Huber+Suhner. These solutions cover everything from advanced microwave and defense applications to telecom, railway, WiFi networks, and industrial RF systems.
Our filters are used to control, shape, and protect RF signals in demanding environments—both at high frequencies up to 40 GHz and in robust applications where low loss, high selectivity, and reliability are critical.
Note: Products that combine or split multiple frequency bands—such as diplexers, triplexers, quad‑ and pentaplexers—are now available on the Couplers & Combiners page.
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Filterkategorier
Low-Pass FiltersLow-pass filters allow low frequencies to pass while attenuating higher frequencies. This is one of the most commonly used filter types in RF design.
From RLC Electronics
- Standard low-pass filters (100 MHz – 18 GHz)
- Custom low-pass (10–26,000 MHz, up to 10 sections)
- High-frequency low-pass up to 50.5 GHz
- High-power low-pass (100–4000 MHz / up to 500 W)
- Absorptive and tubular Bessel low-pass for pulse systems
- Cable-based low-pass filters (semi-rigid / conformable coax)
Applications
EMC protection, radar systems, high-speed digital systems, amplifier chains, microwave transmission.
High-Pass FiltersHigh-pass filters attenuate lower frequencies and allow higher frequencies to pass through.
From RLC Electronics
- Standard high-pass (100 MHz – 18 GHz)
- Wideband high-pass (20 MHz – 18 GHz)
- Surface-mount high-pass (SMT)
- High-pass cable filters (.141 / .086 coax)
From Huber+Suhner
- High-pass / interference mitigation filter (2–13 GHz) for railway WiFi and “Internet On-Board” solutions
Applications
Telecom, microwave, transportation communication, radio front-end, laboratory testing.
Band-Pass FiltersBand-pass filters allow only a defined frequency range to pass and block everything outside that range.
From RLC Electronics
- Micro miniature BPF (10–12,400 MHz)
- Surface-mount BPF (10–6,000 MHz)
- Tubular BPF (15 MHz – 8 GHz)
- Cavity, combline, and interdigital BPF (500 MHz – 36 GHz)
- Tunable cavity band-pass (2,000–12,000 MHz)
- Ceramic resonator BPF (500–2,500 MHz)
From Huber+Suhner (Railways)
- WiFi band-pass filters for trains (2 models)
- Dual-band WiFi filter (2.4 & 5 GHz) – reduces LTE 2600 interference
Applications
WiFi systems, trains and transportation, mobile networks, military systems, sensors, UAVs, radar.
Blocks narrow or wide frequency bands to eliminate interference.
From RLC Electronics
- Standard band reject (10–12,000 MHz)
- Tunable notch (±7.5% tuning range)
- Wireless band reject for mobile standards
- 2–9 sections, 0.5–40% bandwidth
From Huber+Suhner
- GSM‑R Rejecting Filter – prevents interference between GSM‑R and LTE/5G
Applications
Interference suppression, railway, base stations, defense radio, sensitive RF infrastructure.
Waveguide filters are designed for extremely high Q-factor and minimal insertion loss.
- Covers 1–40 GHz
- 0.1–10% bandwidth
- 2–12 resonator sections
- Supplied with cover or choke flange
- Can be combined with coaxial transitions
Applications
Radar, satellite, high-frequency telemetry, defense, and aerospace.
Equalizers smooth out the frequency response in RF chains or compensate for loss across frequency.
Line Loss Equalizers
- 10 MHz – 18 GHz
- Linear compensation for cables and long transmissions
Gain Equalizers
- Linearly increasing or decreasing attenuation
- Half-sine profiles
- Used to correct amplifiers, couplers, and filters
