Product Summary

Lenolink RF Filter is a high-performance passive RF filtering solution designed for GSM 900, DAS (Distributed Antenna System) and mobile communication networks.

The filter provides selective RF filtering between uplink and downlink frequency bands while maintaining low insertion loss, high rejection, low passive intermodulation (PIM) and reliable high-power performance.

With up to 400W power handling, ≤-160dBc PIM performance, ≥80dB TX-RX isolation, high out-of-band rejection and DC/AISG bypass capability, this RF filter is designed for professional telecom infrastructure and wireless coverage applications.

Product Description

Lenolink is a professional RF passive component manufacturer providing RF filters, combiners, duplexers, hybrid couplers and DAS solutions for global wireless communication networks.

This GSM 900 RF Filter is designed to provide selective filtering between the uplink and downlink frequency ranges while suppressing unwanted signals outside the operating bands.

The filter supports:

Uplink: 890-915MHz

Downlink: 935-960MHz

Its high-selectivity filtering characteristics provide strong rejection of unwanted out-of-band signals while maintaining low insertion loss within the required uplink and downlink bands.

The product provides:

• Low insertion loss
• High rejection
• VSWR ≤1.22
• PIM ≤-160dBc
• Power handling up to 400W
• DC/AISG bypass up to 2500mA
• 10kA lightning protection
• IP66 environmental protection

The rugged design supports both indoor and outdoor installation for demanding mobile communication applications.

Key Features

• GSM 900 RF Filter for DAS and mobile networks
• 890-915MHz uplink / 935-960MHz downlink
• Low insertion loss ≤0.6dB
• TX-RX isolation ≥80dB
• High rejection up to ≥85dB
• Low PIM performance ≤-160dBc
• High power handling up to 400W
• VSWR ≤1.25
• DC/AISG transparency up to 2500mA
• 10kA lightning protection
• IP66 indoor/outdoor protection
• DIN Female RF connectors
• Wall or mast mounting
• Customized RF filter configurations available

Technical Advantages

• High-Selectivity RF Filtering

The RF Filter provides strong rejection outside the required passbands, helping suppress unwanted RF signals and protect the wireless communication system from interference.

• Low Insertion Loss

Optimized RF filter design minimizes signal attenuation within the required operating bands, helping preserve RF signal strength and system coverage.

• High Power Handling

With power handling capability up to 400W, the filter is suitable for high-power RF infrastructure and professional DAS applications.

• Low Passive Intermodulation

With PIM performance of ≤-160dBc (@2×43dBm), the RF filter helps reduce unwanted intermodulation products generated by high-power RF carriers.

This is particularly important in high-capacity mobile communication systems where RF noise and interference can affect network performance.

• DC/AISG Transparent Design

The DC/AISG bypass function allows DC power and antenna control signals to pass through the RF filtering system, supporting remote antenna system applications.

• Outdoor Telecom Deployment

The IP67 enclosure, 10kA lightning protection and -40°C to +70°C operating temperature range make the product suitable for demanding outdoor wireless infrastructure environments.

• High Rejection and TX-RX Isolation

With rejection of up to ≥85dB and TX-RX isolation of ≥80dB, the RF filter provides strong suppression of unwanted signals between uplink and downlink paths.

This helps reduce cross-band interference and supports stable RF performance in GSM 900 wireless networks.

Item
Operating Frequency	890~915MHz/935~960MHz
Insertion Loss	≤ 0.6dB
VSWR	≤1.25
Rejection（TX to ANT）	≥85dB @935-960MHz
Rejection（RX to ANT）	≥85dB @890-915MHz
TX-RX Isolation	≥80dB
Rejection (Other)	≥60dB @DC-869MHz ≥50dB @869-888.75MHz
PIM (3rd Order)	≤ -160dBc (@2*43dBm)
Power Handling	≤ 400W
I/O Impedance	50Ω
DC/AISG Transparency	By-pass (max. 2500mA)
Lighting Protection	10kA,8/20us pulse
RF connector	DIN Female
Operating Temperature	-40ºC~+70ºC
Application	Indoor or Outdoor (IP66)
Dimension	283x147x61.5mm
Weight	≤ 2.4kg
Mounting	Wall Mounting or Mast Mounting

Why Choose Lenolink RF Filter Solution?

• Professional RF Passive Component Manufacturer

Lenolink specializes in RF passive components for telecom and DAS applications, including RF filters, combiners, duplexers, hybrid couplers and customized RF solutions.

Our RF passive components are designed for telecom operators, DAS integrators, system contractors and wireless infrastructure providers.

• Customized RF Filter Engineering

Different wireless networks require different filtering characteristics.

Lenolink provides customized RF filter solutions including:

✓ Operating frequency
✓ Passband configuration
✓ Rejection requirements
✓ Insertion loss requirements
✓ Power handling
✓ Connector configuration
✓ Mechanical dimensions

• High-Power RF Design

The RF Filter supports up to 400W power handling, making it suitable for high-power telecom infrastructure and DAS applications.

• Low PIM RF Performance

Low PIM performance is critical for modern mobile communication networks.

The ≤-160dBc PIM specification helps minimize unwanted intermodulation interference in high-power RF environments.

• Professional RF Testing

Lenolink can provide RF testing including:

• Insertion loss testing
• Rejection testing
• Isolation testing
• VSWR measurement
• PIM testing
• Power handling verification

Frequently Asked Questions (FAQ)

Q1: What is an RF filter?

A: An RF filter is a passive RF component that allows selected frequency bands to pass while attenuating unwanted signals outside the required frequency range.

RF filters are widely used in DAS, base stations, mobile networks and wireless communication systems.

Q2: What is this RF filter designed for?

A:This RF filter is designed for GSM 900 and mobile communication applications, providing selective filtering between uplink and downlink frequency ranges.

The specified uplink range is 890-915MHz and the downlink range is 935-960MHz.

Q3: Why is rejection important in an RF filter?

A:High rejection reduces unwanted out-of-band signals and interference, helping protect the desired RF signal and improve system performance.

Q4: What is the maximum power handling of this RF filter?

A: The filter supports power handling up to 400W, making it suitable for high-power RF and DAS applications.

Q5: What does low PIM mean for an RF filter?

A: Low Passive Intermodulation (PIM) performance reduces unwanted intermodulation products generated when multiple high-power RF signals pass through passive components.

This helps maintain a cleaner RF environment and improves network reliability.

Q6: Does this RF filter support AISG?

A: Yes. The filter provides DC/AISG bypass with a maximum current of 2500mA, allowing DC power and antenna control signals to pass through the RF system.

Q7: Can the RF filter be used outdoors?

A: Yes. The product is designed for indoor and outdoor applications and features IP67 protection, 10kA lightning protection and an operating temperature range of -40°C to +70°C.

Q8: Can Lenolink customize RF filters?

A: Yes. Lenolink provides customized RF filters according to required frequency bands, passband characteristics, rejection requirements, power levels, connectors and mechanical specifications.

Q9: Who uses RF filters for DAS systems?

A: RF filters are commonly purchased by:

• Telecom operators
• DAS system integrators
• RF contractors
• Wireless infrastructure providers
• Network equipment suppliers

Q10: Can Lenolink provide RF engineering support?

A:Yes. Lenolink provides RF engineering support for frequency selection, filter configuration, RF performance requirements and customized mechanical design.

Q11: What is the difference between an RF filter and a duplexer?

A: An RF filter is generally designed to pass or reject specific frequency ranges, while a duplexer typically uses multiple filtering paths to separate transmit and receive signals and allow them to share a common antenna port.

For applications requiring specific uplink and downlink separation, the appropriate RF architecture depends on the required frequency bands, isolation, insertion loss and port configuration.

Request RF Filter Solution

Need a Customized RF Filter?

Please provide:

✓ Required frequency range
✓ Passband / stopband requirements
✓ Rejection requirements
✓ RF power level
✓ Connector type
✓ Indoor or outdoor application

Lenolink RF engineers will provide a customized RF filter solution.

Contact: info@lenolink.com