Ku-band Waveguide High-Pass Filter (WR75) is a precision-engineered RF filtering component designed to pass only frequencies above 12.75 GHz while effectively suppressing low-frequency noise, ambient interference, and short-term signal fluctuations. Based on a Chebyshev/Batervord high-pass characteristic, this filter provides sharp cutoff behavior, stable passband uniformity, and excellent out-of-band rejection. It is ideal for satellite communication systems, microwave front ends, telemetry links, and RF environments requiring precise high-frequency selection.
With low insertion loss ≤1 dB, passband ripple contained within ±0.5 dB, and rejection ≥45 dB at 100 MHz below the cutoff, the Ku-band Waveguide High-Pass Filter (WR75) ensures clean and accurate high-frequency propagation. Its aluminium alloy construction and WR75 interface with UBR120/PBR120 flanges guarantee high mechanical stability and seamless integration into Ku-band waveguide structures. By reducing low-frequency interference and stabilizing the usable spectrum, the filter plays a critical role in improving system noise figure and overall link clarity.
✅ Sharp 12.75 GHz high-pass cutoff for filtering low-frequency interference
The filter suppresses unwanted lower-spectrum components, ensuring only the required high-frequency range is transmitted. This improves signal clarity and enhances performance in satellite and microwave RF chains.
✅ High rejection ≥45 dB to eliminate out-of-band noise
Strong attenuation of spectral components below the cutoff prevents interference, system distortion, and overload of sensitive downstream modules. This is essential for clean operation in precise high-frequency RF environments.
✅ Low-loss, low-ripple WR75 waveguide design
With ≤1 dB insertion loss and ±0.5 dB ripple, the filter maintains uniform passband transmission while minimizing signal distortion. The WR75 interface with UBR120/PBR120 flanges ensures consistent impedance across Ku-band waveguide networks.
🛠️ Engineered for high-frequency separation and RF purification The high-pass filter is optimized for removing low-frequency components, stabilizing the microwave spectrum, and improving SNR in high-frequency systems. Its aluminium alloy cavity provides superior thermal and structural durability for outdoor and indoor RF installations.
🛒 Ideal choice for microwave receivers, transmitters and front-end modules Its precise filtering performance makes it suitable for satellite terminals, airborne microwave systems, laboratory test setups, and broadband RF networks requiring reliable high-pass characteristics and minimal signal degradation.
📌 Key features
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Ku-band waveguide high-pass filter with 12.75 GHz cutoff frequency
This WR75 high-pass filter provides selective transmission of high-frequency Ku-band signals while blocking lower-frequency interference. Its Chebyshev/Batervord design ensures precise cutoff behavior and excellent spectral shaping in advanced RF systems.
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Low insertion loss ≤1 dB with ±0.5 dB passband ripple
The filter maintains clean passband characteristics, supporting stable modulation and high-quality microwave transmission. Low ripple ensures predictable amplitude behavior across the usable spectrum.
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≥45 dB rejection at 100 MHz below the passband
Strong rejection guarantees effective suppression of lower-frequency spurious components, harmonics, and ambient electromagnetic noise. This ensures reliable signal propagation in satellite and terrestrial microwave networks.
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VSWR ≤1.5 and impedance-stable integration
The optimized design maintains low mismatch losses, promoting efficient coupling with WR75 systems. This reduces reflections and enhances overall RF performance in feed assemblies and transmission lines.
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Durable aluminium alloy housing with UBR120/PBR120 flanges
The precision-machined body ensures mechanical stability, environmental resistance, and long-term operational reliability. Standardized flange types guarantee straightforward integration into waveguide systems.
⚙️ Main functions
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High-pass filtering for the removal of low-frequency interference and noise
The filter blocks unwanted components below the 12.75 GHz threshold, improving signal purity and reducing noise ingress into the RF chain. This helps stabilize communication links and enhances system sensitivity.
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Stabilization of high-frequency passband for clean microwave propagation
The combination of low insertion loss and minimal passband ripple ensures precise high-frequency transmission without distortion. This supports complex modulation schemes and maintains RF performance under dynamic loading conditions.
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Suppression of short-term fluctuations and out-of-range emissions
By eliminating undesirable fluctuations and broadband ambient noise, the filter provides a stable, well-defined spectrum. This enhances the reliability of satellite, telemetry, and high-data-rate microwave links.
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Impedance-matched integration into WR75 waveguide networks
Low VSWR promotes efficient transmission and reduces reflections that could degrade link performance. This function ensures consistent behavior in high-frequency feed systems and front-end chains.
🧩 Applications
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Ku-band microwave receivers and sensitive front-end assemblies
The filter improves signal-to-noise ratio by blocking low-frequency interference and stabilizing the usable microwave band. It is ideal for satellite ground stations, telemetry receivers, and precision RF monitoring equipment.
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High-frequency transmitters and microwave uplink systems
By removing unwanted low-frequency emissions and fluctuations, the filter ensures cleaner spectral output from transmitters. This minimizes interference with adjacent channels and enhances regulatory compliance.
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Waveguide-based RF feed assemblies and antenna modules
Integrated into WR75 feed chains, the filter provides accurate high-pass filtering for parabolic antennas, feedhorn systems, and modular RF front ends. Its stable cutoff characteristics enhance antenna system performance.
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Laboratory test setups, calibration environments and EMC research
With predictable high-pass behavior, high rejection, and stable passband ripple, the filter supports precise RF measurements and controlled testing environments. It is suitable for advanced research requiring frequency-selective filtering.
💡 Why you should buy from us❓
- 1.5 years warranty
- 7 years after-sales support
- Remote support team of engineers
- Discount program for regular customers 🎁
💬 Contact Us
For additional details or assistance regarding the Ku-band Waveguide High-Pass Filter (WR75), feel free to contact our team. We provide professional consultation and aftersales support to help with installation and setup, ensuring you get the most out of your equipment.
