Ku-band bandpass filter

Ku-band Waveguide Bandpass Filter (WR75) is a precision-engineered RF filter designed to pass only the desired 11.7–12.2 GHz band while suppressing out-of-band emissions, transmitter spurious signals, and broadband noise. Built on a Chebyshev/Batervord characteristic, this bandpass filter delivers sharp roll-off, stable passband response, and excellent rejection performance, making it a vital component for microwave transmitters, RRL systems, and protected front-end receiver architectures.

With passband ripple within ±0.5 dB, insertion loss ≤1 dB, and stopband rejection ≥45 dB at 100 MHz offset, the Ku-band Waveguide Bandpass Filter (WR75) ensures highly selective frequency discrimination and protects RF chains from unwanted spectral content. Whether used for limiting transmitter noise bandwidth, suppressing out-of-band emissions, or improving signal-to-noise ratio in diplexer-type receiver applications, this filter provides exceptional microwave performance and mechanical durability. The aluminium alloy housing and UBR120/PBR120 flange compatibility ensure high stability, long-term reliability, and seamless integration into Ku-band waveguide networks.

✅ Selective 11.7–12.2 GHz bandpass filtering for microwave transmitters

The filter suppresses broadband noise, harmonics, and adjacent-channel interference, allowing only the target Ku-band segment to pass. This enhances spectral purity and ensures compliance with emission masks in high-power transmission systems.

✅ High rejection ≥45 dB for strong out-of-band suppression

Sharp roll-off characteristics prevent unwanted frequencies from entering the RF chain, reducing IMD products and protecting sensitive downlink components. This ensures cleaner link performance in satellite and RRL communication systems.

✅ Stable WR75 waveguide integration with low-loss construction

The combination of ≤1 dB insertion loss, low passband ripple, and UBR120/PBR120 flanges delivers excellent transmission efficiency. This provides reliable amplitude-frequency behavior across the operational band, supporting high-performance microwave operation.

🛠️ Engineered for transmitters, diplexers and RRL front ends This bandpass filter is optimized for microwave transmitters requiring precise bandwidth control and minimal insertion loss. It also serves as an effective diplexer filter in RRL receiver assemblies, improving SNR by rejecting out-of-band interference and ambient noise.

🛒 Ideal choice for satellite RF chains and broadband microwave systems Its robust aluminium housing, stable electrical characteristics, and controlled impedance make it suitable for satellite terminals, terrestrial microwave links, broadcast uplinks, and laboratory RF equipment requiring sharp bandpass performance.

📌 Key features

• Ku-band waveguide bandpass filter with selective 11.7–12.2 GHz passband

The filter provides precise band selection for microwave transmitters and receiver assemblies, allowing only the desired operational band to pass. This enhances spectral purity and supports high-performance satellite and RRL systems.

• Low insertion loss ≤1 dB with ±0.5 dB passband ripple

Engineered for efficient RF transfer, the filter maintains a flat amplitude response across the passband. This ensures minimal distortion and supports stable modulation for high-data-rate Ku-band links.

• ≥45 dB rejection at 100 MHz offset for strong interference suppression

Its steep roll-off characteristic eliminates unwanted emissions and protects RF front ends from overload or intermodulation. This guarantees clean signal propagation across demanding microwave environments.

• VSWR ≤1.5 and robust impedance matching

The filter maintains stable integration into WR75 waveguide networks, reducing reflections and optimizing RF performance. This low-VSWR behavior enhances overall system efficiency and reduces return loss.

• Durable aluminium alloy cavity with UBR120/PBR120 flanges

The precision-machined housing provides excellent thermal stability and mechanical rigidity. Standardized flange types ensure compatibility with professional RF equipment and satellite hardware.

⚙️ Main functions

• Selective transmission of the 11.7–12.2 GHz Ku-band segment

The filter passes only the desired operational band while attenuating all other frequencies, improving overall channel definition. This ensures clean microwave transmission and prevents unwanted mixing products in RF chains.

• Suppression of transmitter noise and out-of-band emissions

By reducing broadband transmitter noise and eliminating spurious components, the filter stabilizes spectral output. This protects adjacent channels and supports regulatory compliance in satellite and terrestrial communication systems.

• Enhancement of receiver noise performance in diplexer applications

Used as a diplexer filter in RRL stations, it significantly increases the signal-to-noise ratio by blocking ambient and out-of-range interference. This enhances receiver sensitivity and improves link reliability under challenging RF conditions.

• Stable waveguide integration with minimal reflection and distortion

Its optimized VSWR and controlled impedance reduce reflections and maintain clean in-band propagation. This ensures predictable behavior in feed systems, transmitter chains, and precision RF equipment.

🧩 Applications

• Ku-band transmitters and microwave uplink systems

The filter ensures clean transmission by limiting bandwidth, reducing noise, and suppressing out-of-band emissions. Its selective passband design enhances spectral efficiency and protects RF infrastructure.

• RRL diplexer and receiver enhancement modules

Used as a diplexer filter, it improves the receiver’s signal-to-noise ratio by blocking unwanted interference. This results in more stable reception in long-distance RRL communication systems.

• Satellite communication terminals and ground station RF paths

The filter provides precise in-band selection and strong out-of-band suppression, supporting high-quality satellite downlinks and uplinks. It is ideal for parabolic feed systems and modular RF front ends.

• Microwave laboratory setups and frequency-selective research systems

With controlled ripple, high rejection, and stable VSWR, the filter supports RF measurements, EMC testing, and development of frequency-selective hardware. It ensures repeatable and stable results for engineering research.

💡 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 Bandpass 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.