Main Product Introduction
This Dual-Band RF Cavity Bandpass Filter is optimized for the 900MHz spectrum, offering discrete passbands at 900.1-915MHz and 945.1-960MHz. Built for high-performance infrastructure, it features an ultra-low PIM rating of ≤-150dBc, which is critical for maintaining high data throughput and reducing noise floor in modern wireless systems. The unit handles up to 100W of average power while maintaining excellent return loss (≥20dB) and steep out-of-band rejection (≥30dB). Equipped with DIN Female connectors and a ruggedized housing capable of operating from -20 to +60°C, it provides the mechanical and electrical stability required for mission-critical telecommunications environments.
Electrical Specifications
| Parameters | Specifications |
|---|---|
| Frequency Range | 900.1 – 915 & 945.1 – 960 MHz (Dual Pass Band) |
| Power Handling | 100 W (Average) |
| Return Loss | ≥ 20 dB (Excellent Matching) |
| Insertion Loss | ≤ 1.0 dB @ 900.1 – 915 MHz ≤ 0.4 dB @ 945.1 – 960 MHz |
| Out of Band Rejection | ≥ 30 dB |
| Intermodulation (PIM3) | ≤ -150 dBc |
| Impedance | 50 Ω |
| Connector Type | DIN Female (7/16 DIN) |
| Operating Temperature | -20 to +60℃ |
FAQ
- What are the typical application scenarios for this dual-band cavity filter?
- This filter is specifically designed for GSM/LTE 900MHz base stations and Distributed Antenna Systems (DAS). It is used to isolate specific uplink and downlink frequency segments, ensuring that only the target 900.1-915MHz and 945.1-960MHz bands are transmitted or received while suppressing noise from adjacent bands.
- Why is a PIM3 rating of -150dBc important for this device?
- A low PIM (Passive Intermodulation) rating of ≤-150dBc is essential for high-sensitivity cellular sites. It prevents the generation of interference signals that occur when multiple high-power frequencies interact, ensuring that your network maintains high signal-to-noise ratios and maximum data speeds.
- How does the insertion loss vary between the two bands?
- The filter is optimized for efficiency, providing an insertion loss of ≤1.0dB for the 900.1-915MHz segment and a very low ≤0.4dB for the 945.1-960MHz segment. This ensures minimal power wastage and maximizes coverage range for both bands.
- What are the benefits of using DIN Female connectors?
- DIN Female (7/16 DIN) connectors are the industry standard for high-power, low-PIM applications. They provide a more robust mechanical connection and better electrical contact than smaller connectors, which helps maintain the -150dBc PIM rating even under high power loads of 100W.
- Can this filter be integrated into existing 50Ω systems?
- Yes, it features a standard 50Ω impedance and a return loss of ≥20dB, ensuring excellent impedance matching and minimal signal reflection when connected to standard RF amplifiers, antennas, and cabling.
