Product Overview
The 50W RF Bandpass Filter (920.1-922.8MHz) is a high-reliability component designed to enhance receiver selectivity and increase transmitter isolation. By providing a narrow passband with low insertion loss and high out-of-band rejection (≥50dB), it effectively eliminates interference when multiple antennas are mounted in close proximity. Featuring a rugged IP67 waterproof design and compact form factor, this filter is ideal for 2G/3G/4G/LTE In-building Solutions and outdoor base station deployments.
Technical & Mechanical Specifications
| Model No. | MFR1-RU900-NF/F |
| Frequency Range(MHz) | 920.1-922.8MHz |
| Insertion Loss(dB) | ≤4.0dB |
| Return Loss | ≥18dB |
| Out of band Rejection(dB) | ≥50dB@915MHz |
| Out of band Rejection(dB) | ≥50dB@925MHz |
| Impedance(ohms) | 50 |
| Input power(W) | 50 max |
| Temperature Range | -10℃ to +55℃ |
| Storage Temp Range | -40℃ to +85℃ |
| Relative Humidity | 5%-95% |
| Barometric Pressure | 55KPa-106KPa |
| Connectors (In/Out) | N-Female / N-Female |
| Waterproof Grade | IP67 |
| Outer Dimension(mm) | 140*84*47 |
| Finish / Packing | As Req / 1 Pce in box |
NOTE: All technical parameters can be adjusted as per the customer's requirement. Our company provides professional customization for specific frequency bands, different connector types, and varied outer finishes to suit your project needs.
Frequently Asked Questions
- Q1: How does this bandpass filter improve system performance?
- A: By isolating the specific 920.1-922.8MHz range, the filter significantly improves receiver selectivity. It suppresses unwanted signals and noise from nearby transmitters, ensuring that only the target signal is amplified and processed.
- Q2: Is this filter suitable for harsh outdoor environments?
- A: Yes, it features an IP67 waterproof rating, meaning it is completely protected against dust and can withstand temporary immersion in water. It is designed for reliable long-term operation in both indoor DAS and outdoor base station applications.
- Q3: Can the out-of-band rejection levels be customized?
- A: Absolutely. While the standard rejection is ≥50dB, we offer OEM/ODM customization. Our engineering team can adjust the cavity design to achieve steeper roll-offs or higher rejection levels based on your specific interference environment.
- Q4: Why is the insertion loss specified at ≤4.0dB?
- A: This specific design balances extreme narrow-band selectivity with power efficiency. For a high-rejection filter in this compact size, 4.0dB ensures optimal signal integrity while maintaining high stop-band attenuation at the ±5MHz offsets.
- Q5: What options are available for connectors and finishing?
- A: Standard units come with N-Female connectors, but we can provide SMA, DIN, or 4.3-10 types upon request. Additionally, the outer finish (paint color, plating) can be customized to match your existing equipment aesthetics or salt-spray resistance requirements.
Mechanical Drawing
